One Burrard Place - One of the deepest excavations (105ft) in Vancouver history

[@agartha8942]

How those excavators will be lift up or back on the exact ground level? What is the process of that. As they are 105 + ft down and digging the ground. . What they do to lift up the excavators to make them reach at ground level or any top to bottom they made temporary path or small road

[@Zepfancouver]

They used a heavy lift crane like this one kzbin.info/www/bejne/eWicdp2eabeZgtU

[@superman-mf7jb]

I've seen helicopters used to pull machinery out. But this looks like a pretty populated area, so they most likely used a crane

[@dave_in_florida]

Derrick crane

[@agartha8942]

@@dave_in_florida oh okay

[@Zepfancouver]

@@agartha8942 Here are the same excavators at a different site kzbin.info/www/bejne/e3aWZ5aXnp6sZ5o being lifted out.

[@badgerabrasives8848]

With the price of Vancouver real estate, they went this deep to get 8 stories of underground condos with the sales pitch stating, "Bedrock View".

[@philrabe910]

rock garden terraces.

[@mr.l6615]

With starting prices for 450 square feet starting at the low low price of 8 million dollars. Lol.

[@Mrwesmrwes]

Rock bottom prices

[@johnfoltz8183]

When you hit rock bottom

[@markbuilder7395]

No doubt they were looking at the plans upside-down.

[@Snaffer01]

Underrated comment

[@joeyork9891]

Lol

[@fairlyobvious8320]

Crap we were supposed to build up!

[@esobofh]

These deep excavations are mesmerizing when you are standing at the edge... it feels very surreal to see a giant box excavated out of the earth. The Georgia Hotel rebuild was 110ft deep - very impressive. To those saying conveyor belts would be better, it really just doesn't work in this environment, this is a hard heavy material, and a conveyor belt would have a hard time lifting it vertically. At an incline, it would literally need to be wrapped around the inside of the excavation in a spiral to get useful production volume, and just would not be practical. Triple handling the load between three excavators that are sitting in place is actually not that bad efficiency wise - when they need to move, that's where major efficiency impacts occur. Regardless, it's a slow methodical process and strict safety rules for shoring and stabilization need to occur throughout the process. Near the end, cranes with claw buckets are used to extract the last of the material, and often it's incorporated as ballast within the core pour if the material is suitable. As a last step, large cranes hoist these 120,000+ lb machines out of the whole like little toys. Next time you walk by a site like this, stop and appreciate, they are marvels!

[@Will91289]

i had actually wondered how they got the excavators out, as the only crane i could see was that tower crane.

[@Zepfancouver]

Heavy lift crane like this one kzbin.info/www/bejne/eWicdp2eabeZgtU

[@rommelong6617]

Reiles.ko

[@caserasera4776]

Nice. We finished boaring pile ons in Melbourne 150ft down into the swamp. This is lovely work to see.

[@caserasera4776]

@Slopalong Joe lol fanks

[@ShredForth]

I’ve seen multiple comments about a conveyor system. The steepest angle a standard conveyor works at (around 30 degrees) would require a much larger hole or many conveyors to get to the bottom. Either way they would be in the way of the shot Crete shoring process, excavation and the constant changing depth would require constant modification to the system. A drag slat conveyor or bucket elevator system would possibly work but again the angle is probably too great as those max out at near 50 degrees, are not typically modular, usually aren’t longer than 100 ft and again would need to be constantly modified to accommodate excavation/ would be in the way of the shot Crete shoring process. This is the most efficient way to do this in this depth/footprint of excavation…… that why it’s basically done this way everywhere.

[@Zepfancouver]

Came across this construction site, using a conveyor to extract the dirt from a swallow pit imgur.com/a/KdhPeP8

[@ShredForth]

@@Zepfancouver Those pictures illustrate what I’m talking about. The angle becomes a problem as the depth increases. In a shallow hole it would work. But realistically…. 2 349 excavators would still be much faster/more cost effective on that site too.

[@CritterFritter]

Amazing how level, plumb and the hole is. Great job!

[@crispindry]

Cool video, I've just been watching a company excavating some foundations in Manhattan, got me wondering how they do it and I found your video. Thanks for taking the time to put it all together.

[@benjarongprojects]

Why didn’t they use a conveyor?

[@johncuervo3019]

Because that would of been to easy and they couldn't of charged as much for the work

[@firstnamelastnameisallowed7943]

I was thinking the same thing. Probably would be a huge chunk of change to make a custom setup then to have it not be used again or for at least a long time and having to keep it somewhere afterward until needed again or until scraped or sold. Sounds like a headache really to me lol. I could be way wrong tho idk.

[@richardcox8409]

The angle required would have been too steep at some point to function properly and that pit is way past that point.. The different materials it would need to transport out would be a factor and would also impact the operational angle in addition to placing a size restriction on the material that can be loaded on the conveyor therefore possibly requiring more equipment and manpower to break down.. You could do it in stages but they take up a lot of room and would be in the way but your comment certainly brings a few ideas to mind...like a hydraulic powered, varying angle, wall hugging, modular step conveyor system, or maybe a vertical screw tube system..you could prob adapt an existing scissor lift platform and add conveyors as a conceptual design....im just thinking out loud here Im no expert but your light bulb inducing comment caught my attention

[@johncuervo3019]

@@richardcox8409 They have different kinds of converyers. That's a good point about the angle but you could have a converyer that has buckets and you would only need minimum angle. They probably just made best with what they already had.

[@richardcox8409]

I thought about the belts that have the small bars on them after i posted and never thought of buckets like a dredge...and yeah Im with you on the "just made the best"

[@JkVersus]

This is "Umbrella Corp" - beginning.

[@mysteryMachinePL]

You mean, BENINGING (:

[@mixed167]

*I dig as deep as that trying to find a pair of matching socks every morning*

[@jknewb6276]

😂 too true!

[@jknewb6276]

@rats arsed I can't wear them long with a hole I get bothered by said hole and ultimately go hulk on the hole and tear it until it can't be worn by hulk anymore.

[@docugraf]

@rats arsed the good one have one hole, the bad have more then one :-)

[@yardfowl3149]

you made my morning with that simple but very relateable (sp?) comment!

[@lepeejon2955]

Line it with decorative tile and you have a pretty impressive swimming pool.

[@TheNefastor]

LOL I'd call that a drowning pool, myself :-D or a submarine pen.

[@mysteryMachinePL]

I like when building owner think about parking space. We need this guy in Krakow.

[@Gyppor]

That's a deep one! must be twice as deep as anything I've ever worked on, very cool to see.

[@Cello69.]

That is gonna be one heck of a pool once completed.

[@THECARKUS]

I wonder if they were tempted to just keep digging and see where they ended up?

[@geuvsa]

Superb work, and in the video we only see the result of the real critical work : to do the contention walls to avoid collapses. That is the structural key of the whole further works, if you imagine the soil load against all that long and tall wall you can get scared. Congrats to those who calculated and made that critical part and thank you for upload video.

[@joansparky4439]

Looks like they drilled in anchors.. wonder how they managed to not hit utilities of the buildings surrounding the site.

[@joansparky4439]

@@frontrowal8656 Anchors (the machine for that is visible, mostly covered with tarps, 2:12 for example) and spray on concrete (visible in the vid around 1:12, right rear corner) and probably steel mesh (not shown afaik).

[@theonlybuzz1969]

A time lapse video showing this would have been one of the best things to happen, oh well, thanks anyway

[@brandleeshadden5913]

Those are some realistic looking RC toys.

[@BigCroca]

lol 😂

[@Zepfancouver]

Like these -"donsiggio" KZbin Page kzbin.infovideos?view=0&sort=dd&shelf_id=1

[@Tax2Me]

Some places have sinkholes. This one looks like a shithole. Unless of course you give us a follow up and turn out to be a DTT. Then it would really be something right?

[@rasoulkhoshravan5912]

Good job. We are going to have such a job, digging 10 meters (one third of yours). We will make a ramp while excavating and send dump trucks down to load the excavated soil. At the end, the excavator will dig the ramp from bottom to top to finish the job. In your case, with 105 ft, I don't think ramping would be possible. Have you considered this alternative?

[@cormackeenan8175]

I love to see a video on how you got those big digger out of the hole

[@Dan23_7]

Cormac Keenan A crane

[@ksr9t]

Manitowac 18000. All out in 8hr shift.

[@ConstructionMachineryChannel]

Cool urban construction video. I'm looking forward to recording the same in Chicago as soon as it gets warm again here.

[@dwcoop5390]

My old man worked for Lafarge and before Lafarge came around, he's been on almost every jobsite in city, including rebuilding the footing under lions gate bridge, Stanley park side, I went with him on that job, BC Place Stadium, skytrain etc, it's endless. This hole is shallow compared to some of the buildings

[@grasshopperplus8318]

Wow, omg, u are a national hero!

[@jbonegw]

Being that close to the edge my stomach would have butterflies every time I reached inside the hole to scoop material.

[@haweater1555]

4:51 The topside excavator is working blind.... the operator can't even see into the pit.

[@kinkietas]

they've got cameras

[@MrTheRythan]

i miss the part when they got the excavators out the hole great video anyway, good job

[@A.J.PMotivation]

They use cranes and lift them out

[@nolanmake1443]

I saw an excavation like that , when they make one of the Casino in the Las Vegas Strip, they use the depth , to put the parking garage in the bottom.

[@joeyork9891]

Interesting which one on strip or off

[@brianbrewster6532]

Hey Zep - some narration would've been really nice here. Some Qs: 1 - are the four retaining walls coated in concrete, what keeps them from collapsing? 2 - Around halfway point, those extended backhoes could no longer reach down below, so how did they remove this loose material? 3 - does anyone know why the Burrard Place Tower needed to go so deep for its foundation? 4 - How many dumptrucks did this require to remove so much material?

[@Zepfancouver]

Drilled horizontal tie back rods and meshing and shotcrete (concrete spaying) - I missed that part, maybe clam shell bucket like this one kzbin.info/www/bejne/fXWQhYSwma2Vhbc - Parking, 9 or 10 levels. - How many dumptrucks? Guess exactly right and win a condo suite in the building 😉

[@brianbrewster6532]

@@Zepfancouver I suppose one could work out how many dump trucks it took by knowing 1- how many cu yds each truck holds, 2- exact dimensions of pit. Relatively easy math equation.

[@jamestrotter7852]

@@brianbrewster6532 No, because you are implying every dump truck gets filled exactly the same amount every time.

[@whyusojelly7989]

@@jamestrotter7852 Nice, and you also assume many other variables, Math is amazing but the instant an assumption is introduce math is just a toy.

[@2000sborton]

I am amazed at all of the armchair quarterbacks proposing clamshells or conveyor belts to do this excavation. They so obviously know nothing about construction sites in a downtown core and the challenges that go along with them. But common sense should tell them that the companies contracted for this job just might have a little knowledge about what they are doing. These jobs are put up for tender and the lowest bid usually gets the job. Sure some contracts are awarded on a cost plus basis, but those are usually government contracts or large utilities like nuclear power plants and hydroelectric dams. Even then the costs have to be justified and are scrutinized every step along the way.

[@lewiemcneely9143]

Great job and VERY nice drilling and shooting!

[@piotrpapiernik]

Great video, super. Greatings from Poland

[@excavatorguy]

Wow... this is cool. Thanks for sharing!

[@Nudnik1]

A very large Manitowoc 7 yard cable clam shell bucket crane up top be more efficient.Could reach most of pit floor. Nice job.

[@brianbranson2306]

yah clamshells have really gone out of style for some reason

[@Nudnik1]

Brian Branson Still used in beach front dredging and break water jetty rocks alot. New ones are hydraulic .I learned on pure friction rigs.

[@sumeetchaudhari8505]

How did they do waterproofing of basements? What was the methodology? Was there in soil backfilling between basement walls and pit walls?

[@Gyppor]

Usually the shoring walls (the concrete-covered walls that you see in the video ) act as the outside form for the actual walls of the building. There isn't an space left when they;re poured. Sometimes they even spray shotcrete directly on the shoring wall and finish that with trowels, that makes u the inside walls of the parkade.

[@comptoncivil7143]

I have a question. What if the excavators are down there while it’s raining really hard. Will it start to flood down there?

[@Zepfancouver]

At 1:14 - 2:00 - 3:16 and 4:20 I see only one pump getting the water out. I guess that's all they needed to control pit flooding.

[@ShopperPlug]

how long did it took to dig that deep? how much was it? I wanted to see how u guys were able to take that huge excavation machine out from the base.

[@Zepfancouver]

It took 10 months. I don't know how much it costed, I would like to know. I don't work for NorLand Limited. I missed the removal of the excavators, was at work that day, NorLand Limited posted a great video of removing the excavator on a different project norlandlimited.com/news/lifting-two-excavators-100ft-deep

[@ShopperPlug]

@@Zepfancouver wow 10 months, not bad. Thanks

[@grumpyoldman336]

why not just run a conveyor system to the top? that seems so inefficient

[@duck0fdeathc336]

My guess would be they used the equipment they owned . As a business owner I’d rather use my equipment and have it take a little longer than spend a bunch of money on the perfect system for each job

[@TimSchmidt_art]

But...how did they get the digging machines out of the hole?

[@fitnesswithsteve]

_“No, no. Dig up stupid”_ -Chief Wiggum

[@norlandlimited]

The Machines taken out of the hole by using a 200 + Ton Mobile Crane.

[@fraserhenderson7839]

a pair of giant helicopters took them away.

[@charlesdarwin7253]

That would be a really great place for a building once they're finished excavations.

[@PDRM-b6b]

Hi, these are very informative. Can you tell me whether blasting method was used here or this is entirely through jackhammer? thanks

[@Zepfancouver]

Blasting was used multiple times, at 5:09 you can see large fragments of shale rock from blasting and some blasting mats stacked up next to the pile of shale rock.

[@mwnciboo]

Surely they have heard of conveyors and cranes..

[@Zepfancouver]

They're using a dredge bucket at a dig not for from this site kzbin.info/www/bejne/fXWQhYSwma2Vhbc "Alberni by Kengo Kuma"

[@jigginjohnson2893]

I wonder how many cool artifacts, bones, fossils, etc are digger up and never found in construction like this. They just get relocated and used as clean fill somewhere.

[@62Cristoforo]

Anyone know the soil type for this part of Vancouver? Looks like very hard clay from these angles, and from the types of equipment being used.

[@Zepfancouver]

Shale Rock, compacted mud and clay. This construction site is only 350 metres from the shoreline so the hardpan on this dig began only a few metres from the surface. (Disclosure: I'm no expect or geologist.)

[@QiuyuanChenRyan916]

Rock flour, very common in this region. It can be found as far as west Langley.

[@1985singhraj]

Could you please explain how soil collapse has been protected in such deep excavation

[@Zepfancouver]

This is the method for the excavated perimeter walls - Shotcrete (spray-on concrete) - Drilled holes in wall for tie rods, installed meshing then spray on concrete, like this kzbin.info/www/bejne/pV6ZqIGvjqibjJI a site (Alberni by Kengo Kuma) not far from here.

[@1985singhraj]

@@Zepfancouver Thanks... That means step down process is followed. First excavation of few feet depth then shotcrete is done ... Then again further excavation is done and Shen shotcrete is done. This is repeated till desired bottom of excavation. Otherwise for such vertical cut soil wil collapse.

[@jebj1]

In NYC the unions would have 250 people on that job. 1 to operate the excavator and the other 249 to "supervise".

[@Subaruej20]

Lol that's pretty good....here in Australia things are very similar at times...especially our local council workers....I remember once I drove past some local works and someone had spray painted a sign that said.....more padded shovels required...says it all.

[@BassMaann]

You're thinking of city workers buddy. UNION for life

[@Subaruej20]

Yeh well unions can be a bad thing also.....building sites being held to ransom by unions over the most stupid things...we have one atm here....a 300million dollar high rise tower stopped because the government acused them of getting underworld figures here to stand over workers that complain about unsafe working conditions. And at the other end of the spectrum we have unions that demand unrealistic wages for workers...e.g..$38 per hour for a site cleaner....picking up offcuts!!! And wonder developers go bust!!! So union for life my ass!!!

[@RipVDub]

Q: how did they get the Excavators out of the hole: 1) first guess - disassembled and lifted out with the crane 2) see first guess

[@Zepfancouver]

No disassembly required, they used a heavy lift crane like this one kzbin.info/www/bejne/eWicdp2eabeZgtU

[@Elchapo62]

This project will stop once we hear Indian burial ground.

[@BESTOFDASHCAM]

nice cuts nice video :)

[@pmarcus911]

In America OHSA would of shut this site down. It’s not the job it’s not the tool it’s how you use the tool that keeps everyone safe

[@2000sborton]

And why would they have shut the job down exactly? Canadian safety standards tend to be more stringent than OSHA's as a rule. What did you see in this video that you deem to be unsafe?

[@ORGANIZEDCoNfUsioN]

My question is where do they put all the dirt that comes out of the hole. I dig a small hole in my backyard and I struggle to get rid of it.

[@kim79710]

Dump trucks haul it off

[@Bushcraft-xz6xd]

They dig another hole somewhere else and put it in there!

[@carlogambino2160]

ORGANIZED CoNfUsioN Lmao your right

[@rightdudehere1352]

Land fills

[@manuellezamizsantos1736]

Magnifica perspectiva de un solar en construcción y el empleo por parte de una de las excavadoras de una especie de uña en el lugar del cazo.No lo había visto en obras en España!!!!!

[@ethanallenhawley1052]

At about the six minute mark that bottom excavator started to remind me of the times I have tried to repair broken relationships.

[@Zepfancouver]

Lol...Distanced and maybe a little out of reach.

[@ethanallenhawley1052]

@@Zepfancouver and still digging!

[@01gtbdaily30]

It was at the 104 ft Mark when they realized you can’t actually dig to China and the new trade route was doomed to fail.

[@danielbarton1161]

Seems like a conveyor belt would be more efficient getting the dirt out.

[@DIRT-BOSS]

I agree a super stacker like Parker on Gold Rush would work great!

[@MrJenten10]

@@DIRT-BOSS to steep,,, Crane and bins

[@rogeronslow1498]

The remove the same weight of earth as the final building weighs. This is so that the pressure of the building on the ground is no higher than the original pressure due to the earth alone.

[@yardfowl3149]

wtf are you smoking son? that was an extreme line of BS :D

[@SteamCrane]

Gotta wonder what they were thinking. It would have been much more efficient to use a medium size Manitowoc or similar crane with a moderately large clamshell, with front end loaders instead of hoes feeding the pile for it to dig. Wouldn't even need to be a very big crane to beat this production rate, and footprint on the street wouldn't be much larger than the hoe up on the surface. These mid-size cranes are readily available to rent, so you don't need to buy one. Agreed that conveyors might have trouble with the big rocks they turned up. This is a real misapplication of excavators. One or 2 would still be needed for the detail work that excavators are good at. Not rocket surgery!

[@imchris5000]

crane operators cost way more on the hour than a excavator operator

[@SteamCrane]

@@imchris5000That's probably the reason, the difference in required skill level.

[@joansparky4439]

@@SteamCrane The skill level of the excavator guys was pretty high thoo. ;-)

[@tallbadger]

This is what they need to do on oak island

[@Jake_Hynds]

Lmao yea pretty much

[@nigelb5341]

.....and they still wouldn't find anything!

[@roberthungerford9019]

now that is funny. you could miss a whole season and still be at the same point.

[@allanadam4553]

They spent $2.3 million to do the 48” bore holes. Forget about the beach, should have lowered the ground to sea level 300 foot around the money pit. Once at sea level either sink a wall as in this video or a sheet pile like they did on the beach, would cut any flood tunnels. Dig down slowly like an archeological dig. Since the pad looks to be about 40 feet above sea level, they would need to only sink a pit about 140 foot to bed rock and reveal all attempts at searching as well as flood tunnels and hopefully a money pit? Only hitch is if there are caves or cracks with access to water lower down and fill up from below hard to seal and pump out. Had they done this 4 years ago they could have saved money, dug through the winter with a covered pit and we would have had some kind of resolution, show is getting kind of boring with constant rehashing of what we already know.

[@get-the-lead-out.4593]

I'll admit that I'm ignorant concerning construction on these levels and so with that being said I was wondering was the whole depth of concrete walls already there and so when they kept digging down it kept exposing more of the concrete walls, or more likely the workers somehow kept adding to the wall as they dug deeper

[@Zepfancouver]

Kept adding to the wall as they dug deeper called shotcrete (sprayed concrete). You can see them at 1:06 far right corner spraying. By the way i like your call name.

[@get-the-lead-out.4593]

@@Zepfancouver thanks for the heads-up...I would have never seen that guy spraying concrete even when I'm viewing the video with a nineteen inch pc monitor

[@wooodrow99]

Looks like they were drilling and post tensioning the wall as they ascended as well. That’s what those little stubs of cable are sticking out of the face.

[@Zepfancouver]

That's right wooodrow99... building walls with low velocity spayed concrete kzbin.info/www/bejne/mpeqnWOEZs2iqac in the Burrard place Office tower and Toyota Dealership site next door (same project imgur.com/cTiRvlo ).

[@СтэндофферСтэндофферчик]

SUPER

[@ZeidGho]

How they got the excavators out, and how they put that crane in, is what I was hoping to see

[@Zepfancouver]

Me too. Tried to capture the egress of these excavators, but was working that day, got home and they were gone. Still trying to catch one, lots of digging in Downtown Vancouver. They used a heavy lift crane like this one kzbin.info/www/bejne/eWicdp2eabeZgtU

[@HubertofLiege]

They did this in Seattle way back with steam electric shovels and conveyors that loaded barges and dumped it into the bay. Denny regrade I believe

[@ExcavatorDaily]

Extreme Excavator work! Really amazing.

[@terryleimonis]

Is it legal not to have the scaffold stairs end with a 20 foot ladder? what if someone is injured and needs to be evac'd?

[@Zepfancouver]

They need to dig, shore and shotcrete that area as they dig down. I guess it's needless work to build and breakdown scaffolding.

[@DIRT-BOSS]

What type of material was that I seen no shoring on the sides!

[@Zepfancouver]

They call it shotcrete (spray-on concrete) - Drilled holes in wall for tie rods, installed meshing then spray on concrete, like this kzbin.info/www/bejne/pV6ZqIGvjqibjJI a site (Alberni by Kengo Kuma) not far from here.

[@doubleT84]

As a German, that seems inefficient. There have to be more efficient and faster ways. brb., designing something.

[@imgonnagogetthepapersgetth8347]

As a German, do you have any suggestions, or just the knowledge that there "have to be more efficient and faster ways. brb., designing something." ? "brb"?

[@FloHilux69]

Irgendwelche Tiefbau Erfahrung das du sowas sagst? Nein ? Dann halte Maul. Wir machen das auch so

[@FloHilux69]

@@imgonnagogetthepapersgetth8347 he's stupid, we germans would do the same. Look Germany is like 80% idiots relying on 20% hard working people.

[@lasalleman]

Pretty amazing piece of work.

[@Tomekj185]

By chance, you didn’t happen to get any video of them removing the excavators once the digging was completed? Given the depth of the hole combined with the weight of each piece of equipment the removal would have been an interesting video as well.

[@Zepfancouver]

No missed the heavy lift. Always asking when. Then one day a worker telling me "tomorrow" but I was working that day. Disappointed.

[@nathangonzales3768]

I'm not an expert but I'm guessing they took them apart to lift them out

[@leopold7148]

@@nathangonzales3768 Using a big telescopic crane seems a more logical (and cheaper) solution to me.

[@Zepfancouver]

Like this one kzbin.info/www/bejne/eWicdp2eabeZgtU

[@azanudniy]

In this logic they should lift them by constructing building under them

[@mariotorres6287]

Fabulous video!! I am from NYC, and have never seen an excavation go that deep, since in many parts of NYC rock is not too far below the surface. The deepest I have seen for building foundations go down perhaps 50 to 60 feet. This video is impressive at 105 feet to bottom grade. Looking at this excellent video, I have a few questions: I see the tiebacks in the excavation walls. What kind of geology exists there in Vancouver? No hammering was evident, but a single-tooth ripper was in use. I saw that rock was a good ways down. Spoil had to brought up via relay, from excavator to excavator, working on benches to get the spoil loaded into trucks. Another question: The excavator at the street level was digging at maximum depth, well before bottom grade was reached. How was the spoil pile against that corner finally removed? I am guessing by clamshell? Thanks for posting this fine video. As a construction buff, I always enjoy seeing how things are done in different parts of the world. Thanks again for posting this.

[@Zepfancouver]

There was blasting done forum.skyscraperpage.com/showthread.php?t=186101&page=49

[@Zepfancouver]

Same project - Office Tower. This is how they got it all out in the adjacent pit (shallower pit) kzbin.info/www/bejne/ioKogJelaNeWnq8 A view from Tate on Howe penthouse of Burrard One project site i.imgur.com/cTiRvlo.jpg

[@johnfoltz8183]

In DC, almost all new construction has deep excavation

[@williamd4707]

Nothing new here. People need to make a journey to Lebanon and check out Petra and see what the Greeks and Romans built 2,00 years ago. Amazing dig.

[@ricbarker4829]

Thanks to this video it is news to me.

[@deankawaja9634]

Why didn’t you all use a conveyor belt to send the dirt and rock up ?

[@rodwallace6237]

Thought this was one of those billionaire basement stories: guy buys small house in London, Manhattan and can't go up so they dig down. More than one story from England where they had to leave the backhoe down in the hole. Took it down in pieces and couldn't fit the pieces up.

[@bencarter2932]

With such a deep excavation , wouldn't it be cheaper and more efficient to use a belt system or two?

[@xxxmikeyjock]

if it was cheaper that is how they would do it.

[@oldgordo61]

Why did they dig so deep for this particular building?

[@Zepfancouver]

For 9 levels of parking. I thinking enough space for each tenant (if needed) having 2 parking stalls.

[@TechyBen]

@@Zepfancouver Wow. I don't know if that's clever or crazy. Seems a little claustrophobic. Around here, they just give up on parking and expect you to figure out a solution yourself. XD (Though to be fair, I have no idea how they solve it in London, they may just take the bus...)

[@Jagonath]

What are the cylinder things for at 7:00? It looks like a tunnel that men can climb down, but for what? How high up does it go?

[@Zepfancouver]

Those are catch basins, they don't go higher, they're about 10 to 15 feet deep, it catches water that trickles down into the parkade. They're installed with pumps so they can be drained when needed.

[@Jagonath]

@@Zepfancouver Thanks, awesome. So they're drains under the whole building that pump water out? Amazing!

[@qzqx3047]

How do those dozers and digger buckets get out of the hole eventually?? This is amazing

[@Zepfancouver]

NorLand Limited posted a great video of removing the excavator on a different project norlandlimited.com/news/lifting-two-excavators-100ft-deep

[@bustedaxleoffroad9408]

The real question is how do you get them out

[@Zepfancouver]

Using a heavy lift crane like this one kzbin.info/www/bejne/eWicdp2eabeZgtU

[@Stephen1455]

Surely they could use conveyor belts for the finer stuff!

[@gracefool]

There's a reply below: conveyors aren't good at lifting heavy stuff. You'd have to build a massive spiral of conveyors, or an elevator. Either wouldn't be much more efficient than the excavators. You're only losing significant power efficiency when the excavators move on their tracks. A better question is why they didn't leave in a spiralling ramp as they went that trucks could drive down, and then excavate the ramp bottom-up at the end. Wouldn't even need to lift them out that way.

[@seanmcguire7974]

Why does the dirt look like that? N how are the walls staying up. Are they putting concrete on them every few feet or is that the gray dirt that there digging ?

[@Zepfancouver]

Hardpan (a hard layer of clay). Yes, it's shotcrete, you can see them staying concrete on to the far right lower wall at 1:06

[@missionDan]

Wonder why the dont have a clamshell bucket on a line to get the spoil out?

[@joansparky4439]

Rarely needed and would thus be expensive?

[@missionDan]

Joan Sparky with respect the right tool for the job is always cheaper.

[@2000sborton]

One of the largest problems on a construction site is the lack of space around it. Where exactly would they set the clamshell up. Plus you have to park the trucks on downtown streets to load and there would be zero tolerance of spillage. Trust me, the contractors on these sites are well experienced and know how to do their jobs in the most efficient and cost effective way possible.

[@missionDan]

steve borton i cant see a clam shell and wire set up on a 360 excavator would use any more room than the machine thats being used here. Remove boom, fit hydraulic winch and wire with bucket. Theres more than one way to skin and cat i guess and i dont work on projects of this size but that would be my method if i did

[@2000sborton]

@@missionDan and how do you load the truck? Where does it park in relation to everything? Trust me, theses holes have been excavated in downtown locations for over a hundred years now. The details were worked out long ago and this is the best way possible. Do you really think that the experts in excavating are not aware of clamshell excavators. If it worked they would be using them.

[@Zorgongola]

Do we see the CATS digging their own graves at 6:58, then at 7:12 they have crawled in and been concreted over in those two large rectangular holes? There's no ducting or vertical reinforcement coming up from the graves, so what other purpose can they be for...

[@UnitSe7en]

No. Don't be silly.

[@chappy726]

I"ve casually seen a few deep excavations in Vancouver - like the Canada Line section of Skytrain. What is that blue-grey ground material and how deep does it go? It seems endless and not to bad to work with for stability and consistency. Looks like glacial (marine) till - but sooo deep

[@Chastity_Belt]

Why didn't they use a conveyor? Well, because it's must been installed somehow in that pit, but excavators will work there anyway, so it's doesn't have sense to spend time and money installing a conveyor.

[@gary24752]

So are the side walls slurry walls? How did they get the excavators out afterwards?

[@Zepfancouver]

Yes, shotcrete (concrete spaying 1:06 ) Heavy lift crane.

[@ziyaadhoosaindelavega3081]

How did u get the excavators out of there and the balance of the soil

[@Zepfancouver]

With a crane like this one kzbin.info/www/bejne/eWicdp2eabeZgtU and the last of the spoils with a clam shell bucket crane like this kzbin.info/www/bejne/fXWQhYSwma2Vhbc

[@wcresponder]

Does that have a hydro station planned in the basement? Do you have a video of the excavators getting removed?

[@Zepfancouver]

No I missed the heavy lift, was disappointing.

[@paagou3496]

Thats wat i wanna watch

[@rickferrier3496]

One of my favorite jokes in a blueprint reading course was a guy yelling stop digging the new guy had the plans upside down.

[@MrJenten10]

Worked on a building project half built, the engineer was walking /reading the prints and walked backwards right off the edge didnt make it home

[@adminilham344]

3 dene texnikani ora yigincax birdene 17 metrelik uzun qol getirerdiler bir normal qolu olan da iceride isdiyerdi bu daha yaxsi olmazdimi ?

[@waltersanda836]

Thanks for the great video! My question is: how is the excavator retrieved from the pit/excavation ?

[@Zepfancouver]

I missed the egress of those excavators, I knew the day is was going to happen but I had to work that day. Here are the same excavators at a different site kzbin.info/www/bejne/e3aWZ5aXnp6sZ5o being lifted out. One day I will capture an excavator being lifted out of the pit.

[@lt4324]

wondering if the walls are natural or did they make slurry walls prior to the excavation ? Anyone here know?

[@Zepfancouver]

Has they dug down, drilled holes in wall for tie rods, installed meshing and shotcrete like this kzbin.info/www/bejne/pV6ZqIGvjqibjJI a site not far from here.

[@caseycross8496]

what is that retaining wall method called? is it a Diaphragm cut off wall?

[@Zepfancouver]

Shotcrete method - Drilled holes in wall for tie rods, installed meshing then spray on concrete, like this kzbin.info/www/bejne/pV6ZqIGvjqibjJI a site (Alberni by Kengo Kuma) not far from here.

[@brotangyoust9252]

A conveyor would work or even a crane lifting bins on rotation system and putting straight onto flatbeds, when your double or triple handling the same material you gotta just stop and look at more efficient ways.

[@brotangyoust9252]

@@jaquigreenlees over head powerlines in a city? Like tram and bus lines or actual power lines? Usually that all runs underground I thought. They must have an area for loading available so why not just park the trucks under conveyor? You don't start stop it you use a spotter with a radio to tell excavator when to stop loading the belt. Then as new trucks lining up he radios to start loading again. Who the heck would think to try start stop a loaded conveyor?

[@mattywho8485]

@@jaquigreenlees If there is room to load a truck with that long stick excavator, there is certainly room for the "head of the conveyor" to empty into the truck !

[@wrenchingandwheeling1589]

I can’t stop thinking about the cost of the fuel for this type of project. 🤯

[@iwrotethis4712]

How about the cost of the entire project?

[@khadijagwen]

There is one in Portland, Oregon that is 8 parking levels. Don't know how many feet.

[@FlatTruth]

Khadijah Brown average story level is 10ft...so 8 storys...this is 10.5 storys down...it is deep.

[@mrbat0003]

So the million dollar question, is how did they get those 2x excavators out of this big hole when the job was finished??

[@DorianWilson]

kzbin.info/www/bejne/Zl67g32OmbplsM0

[@kova1577]

How exactly are they going to get those vehicles out? Just imagining the expense of digging the hole and building the foundations make me sick. It’s probably millions I assume, it make’s me wonder how can anyone just afford to do something like that it’s very fascinating and sad that I would never have the ability to have something like this done

[@Zepfancouver]

Sadly I was working that day they lifted the Excavators. Here are the same vehicles on a different site kzbin.info/www/bejne/e3aWZ5aXnp6sZ5o being lifted out.

[@DavidMay-t9b]

What are the average size of the meshed panels? Standsrd 7'x10'? Or do you larger panels for a job this size?

[@Zepfancouver]

From what I saw, they looked like your standered 7×10.

[@damienwilliams3108]

I would like to know how are they going to remove they heavy equipment from 105ft from down there

[@cooliobob1274]

A crane.

[@wcresponder]

@@cooliobob1274 Or an american bald eagle.

[@cooliobob1274]

@@wcresponder Fuck yeah, bud! I like your style!

[@hygrometer]

When she said "Deeper", he took it far too literally, spilling over into the following days and well into his place of work as a construction/excavation foreskin on a job site.

[@kreed1004]

will this place end up requiring like a permanent bilge pump?

[@xgtmg]

I don't care for working underground one bit. That is always where the serious accidents happen.People get killed or messed up. Twenty stories up and I'm fine.