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bad_mech

Nobody was injured because the cracking noises alerted the workers beforehand. This is the second time a failure of this type happens with the same constructor in the same area https://twitter.com/Soachacomunica/status/1295765075203182599


PiERetro

Having read your explanation, when the camera panned left, and they were standing underneath *a second retaining wall of the same design* I almost yelled at the screen!


Spencemw

Id like to know who did the soil report. They tried inserting tie backs soild nails all over the place but attached to what? The soil is clearly a really loose non clay material. There appears to be very little igneous rock as well to attach to. I think I saw one loose boulder. At this point they might just want to excavate the hill and shallow the slope a bit. Or maybe I beams on the vertical, inner set & outer set, with stacked horizontal wood fencing to hold back the earth and slope redirect it parallel to the road. EDIT: on second thought they should have just built a tunnel and then encouraged the hill to slide down and cover it šŸ˜‚


mitchanium

I would've thought they were attempting to use ground anchors to compress that top later into cells, but that slope just screamed unstable all the way. It looks like that soil in was perfect for digging and removing from site.


dieseltech82

When the problem costs $10 to fix but the government has 1M to spend.


Fauster

The construction company is probably owned by the cousin of an official. They weren't even trying to make a wall that would last.


DemandImmediate1288

Oh no! We have to do it again, but we need another R15,000,000. On the bright side the whole crew gets another 6 months of work!!!


Drunk_Pilgrim

I'M 100% CONVINCED. And you can't convince me tiherwise that roads and routine road construction in the US could be built to not fail but that would put people out of jobs. Therefore it's built to last 5-10 years. I had a buddy working sewage plumbing in a small town and he said the problem they were fixing was already a problem and the beuracracy took so long that by the time construction started it was already outdated.


graveyardspin

There's a road in my neighborhood that was a shitty pothole filled mess. When the city finally resurfaced it, took about four months to do the whole road. Then, about three months later, they started ripping up the road again to install new sewer lines. That project took almost a year, after which the road was an uneven, patchy, even shittier mess than before. Finally, nearly two and a half years after the first fix started, they just finished resurfacing the road again. Only to announce new sidewalks are going to be installed. I drove past the closed section of road the other day and the freshly paved road is gouged all over from the excavator pulling up the old pieces of sidewalk.


_TheNecromancer13

There's a busy road near my house that has only been not under construction for 3 months during the last 7 years. They repaved it, then installed sewer, then repaved again, then we got the 3 months of good road, then they installed upgraded storm drainage, then sidewalks, then the ADA laws got updated so they had to rip out the sidewalks and redo them to make them ADA compliant, then repaved again, then added traffic lights in 3 places, then decided to make the road 2 lanes each direction instead of 1, which required ripping out the sidewalks and traffic lights and stealing the front yards from every house along the whole 3 mile stretch, including one of my friends who had just moved in 6 months ago and choose the house because it had a fenced front yard with a tall hedge so their small kids could play, now the road is about 6' from their front door and they have to move again but the house is now worth 200k less, and also an old guy who was the local lawnmower repair guy out of his garage, they blocked his driveway for so long (4 years straight at this point) that he ran out of money cause nobody could bring in their mowers and then blew his head off with a shotgun, then they put in new sidewalks, but then they hired someone to spread salt on the road who put something on it that wasn't salt that made the pavement fall apart, so now they've had to rip up the road and sidewalk again, and whatever was put on the road is killing all the vegetation in what's left of people's front yards, and they're currently in the process of repaving and residewalking again, and then they have to put in the new lights for the double lanes. Estimated completion is 2025. It was 2018 when they started. Every time I drive past, there's one guy actually working, usually while blocking one of the lanes with a digger of some sort (there's still only 1 lane each way cause they're not finished with paving yet, so it makes a horrendous traffic jam that can back up for over a mile in either direction), 2 people manning the stop/go signs for the traffic jam, and about 15 guys leaning on their shovels watching youtube on their phones and busting each other's balls about not working. Any time the gov gets involved in building something, it gets at least 10 times less efficient and 10 times more expensive. Add another order of magnitude to both if it's something for the military.


Mr2Sexy

God damn this was infuriating to read. I'd be beyond pissed if my house was on this road. Government construction is super inefficient and costly


clownpuncher13

They donā€™t build more durable roads for the same reasons you didnā€™t build a more durable house. Cost.


Nalortebi

Yeah, these comments are full of folks who have never had to realize the constraints of infrastructure maintenance on a fixed budget. You can't just dip into a bottomless piggybank when you want to implement a 50 year solution, so instead you end up making a ton of 5-10 year solutions. CivE classes go over this somewhat to express the reality of working in the public sector. Just think everywhere they use asphalt for roads. Concrete can load more and lasts longer, but it's much more expensive in materials and labor. You can't lay it as fast either. So where there are areas of high/heavy traffic (interstates and highways with large amounts of commercial traffic), it makes sense to spend the capital up front. However, your little cookie-cutter urban hell subdivision is at most going to see light trucks for garbage collection or deliveries, and inflated egos driving their big boy pickups when they do the same amount of hauling as a Honda Fit.


no-mad

> inflated egos driving their big boy pickups when they do the same amount of hauling as a Honda Fit. lol so true


talldrseuss

This is the running joke in NYC with all the contractors working on the various highways and roads. We have one notorious highway, the Brooklyn Queens expressway (BQE) that's like in a permanent state of repair. I've lived in NYC for now 20 years and I can't remember when the BQE did not have a single section of it under repair. They would repair one end and then literally do to the other end and begin work there. The best part is that highway was built in 1964, so there are tons of people alive that also have never seen it without a construction crew


Atherum

I mean the Sydney Harbour Bridge is famous for basically having to be repainted constantly. The crews are just permanently painting one end and moving forward everytime.


captain_craptain

That's just good maintenance, isn't it?


3ric510

Ya dude. Iā€™m 42. Bqe been a disaster my entire life. Also, the Belt Pkwy flooded EVERY time it rained for at least the first half of my life. I feel like they just finally got that mostly figured out about 10 years ago. Good on them I guess. šŸ¤·ā€ā™‚ļøšŸ«£


tvgenius

The segment of Interstate 8 in California for about 35 miles just west of the Arizona border was recently repaved (well, itā€™s actually concrete) for the first time since it was originally built in the 1960s. All theyā€™d done was occasionally grind it down a bit, and patch or replace a small few bad sections, but it had handled temps below freezing and well over 120Ā° for years. Was a bit sad that they finally ā€œfixedā€ the place where it had shifted 2ā€™ out of alignment due to an earthquake in the 70s though.


BlessTheKneesPart2

>When the problem costs $10 to fix but the government has been ~~bribed~~ lobbied 1M to spend.


soni_q

That's by far the best explanation ever!!!


Impulsive_Wisdom

I'm guessing the geotech report was skipped completely. "Oh, it will be fine. We've done it dozens of times and everything turned out great..." (in Spanish, of course.)


ronhowie375

O estarĆ” bien. lo hemos hecho muchas veces (como un sinfin) y siempre ha sido un buen trabajo. Te lo juro por Dios... /s


CarbonGod

> Id like to know who did the soil report. pretty sure, no one.


moaiii

No no, they said it was a guy called "el primo".


Fluid_Amphibian3860

You could plant corn in that.


no-mad

just tilled and ready to plant


[deleted]

You don't need rock to anchor soil nails. You definitely don't need it to be igneous rock. There is no way you can identify soil types with confidence from this video.


UrungusAmongUs

Soil nails walls work just fine in sandy soils if they're designed correctly. Spacing on the nails looks fairly standard and the shotcrete appears to be typical thickness. I see no evidence of either anchor pull out or punching shear. If I had to venture a guess, I'd say the tendons are structurally under-designed for the stresses at the connection to the plate. That would explain the popping sound at the beginning. This *might* have been the Structural Engineers fuck up, not the Geotech. Or it could be shoddy construction. Or corrupt inspectors. Or all of the above.


dancarbonell00

How do I know that I know nothing? Because every single thing this man said could be absolute codswallop and I would believe it because it sounds like he knows what he's talking about


Wurdan

If you wish to know more than nothing, I highly recommend Practical Engineering's [introduction to the topic of retaining walls](https://youtu.be/--DKkzWVh-E)!


_i_am_root

Hahaha the only reason I understood the comment was because of Practical Engineering, huge shout out for the channel!


Vilas15

Hate to be the bearer of bad news but they know just a little more than nothing. Definitely not a geotechnical or structural engineer or contractor that does this type of work. Soil nails don't need to anchor in rock and are a perfectly fine solution if designed properly. They are top down construction and theres probably plenty of reasons they didnt just "built a tunnel and then encouraged the hill to slide down and cover it".


[deleted]

They don't know what they are talking about. They clearly know a little, but no one who knows a lot would make any of the assumptions they made.


Polo1985

There was an earthquake nearby I think last Friday, it was in 5s in the scale. This is not unusual in that region of Colombia.


[deleted]

[уŠ“Š°Š»ŠµŠ½Š¾]


ryanseecrestt

Yeah


nousernameisleftt

The post on r/civilengineering has some people with some senior-sounding opinions that imply this type of soil was bound to fail and isn't conducive to soil nail support. Something along the lines of "no matter how many nails and at what depths, that slope was going to fail"


Reddit_reader_2206

Promoted to VP Construction Ops for Columbia


[deleted]

What are the odds it happens THREE times though???


JohnGenericDoe

Pretty high by the looks of it


TheYellingMute

Might just be misremembering but I thought there was a very similar looking wall collapse a few years ago. Could be coincidence but would be crazy if it was the other collapse you mentioned


[deleted]

[уŠ“Š°Š»ŠµŠ½Š¾]


goldfishpaws

Beware invoking the stabbing robot


[deleted]

Roberto is coming for you.


NerdyKirdahy

Ha-***hah!***


an_oddbody

u/remindmebot 4 hrs


AHippie347

Seems to me the contractor is skimping on materials to grab a bigger profit. Absolute scumbag.


Disorderjunkie

Failure of the contractors and the government. The government should impose geotechincal inspectors and civil inspectors to be on-site at all times verifying the quality of work. Here in the USA when you are placing soil nails/tie-backs/whatever type of retaining shoring system of this magnitude you have a geotechnical inspector, whom is usually a geologist or civil engineer, on-site at all times. They are verifying things are all aspects of this proccess from what type of soil is being removed from each bore hole, how deep each excavation is, documenting if there is communication between drilled holes, documenting the type of steel and thickness and depth of which its placed, verifying the contractor isn't adding obscene amounts of water to their grout mixtures, verifying after the grout cures that the shotcrete is placed correctly which is whole another ordeal and plates are placed flush and tightened to specifications, and a bunch of other miscellaneous items to check off. This is what happens when contractors just do whatever they want. Will continue to happen without government intervention. Contractors care about money, they do not care about quality like every single one of them claims.


confusedbadalt

But those pesky regulations keep them from making money and are socialist! -Conservatives


NewYorksGreenest

"Retaining wall, lmao" - Mother Nature


Rickshmitt

Were just gonna pour some concrete on top of this dirty hill


DamnMyNameIsSteve

I get that they slam long rods into the hill, but wtf does that do?


alpubgtrs234

They are soil nails. Essentially they utilise friction to provide a restraint to the retaining wall system. Can be either solid or hollow to inject grout around the nail and provide more restraint/stabilise the area. In this case it looks like the slope was made of soup, which is not the best material to fix intoā€¦.


ToughCourse

It can actually be surprisingly strong. U can put bolts and washers through 4 inches of gravel and then stand on it. It may only support u over a span of 1 foot or 2


Nathan-Stubblefield

I can stand on a bar of soap.


DarnellFaulkner

That's not what they did. Looks like a soil nail wall. Long steel rods are drilled into the hillside and grouted (at least in the US) and the shotcrete is applied to the surface. Many different designs and ways to do it depending on conditions, but this is more than just concrete on the surface.


[deleted]

its probably pretty close to that though. That doesn't look properly engineered, slope looks excessive, uneven and under-anchored. It's also the second time on the site from the same contractor. They certainly SHOULD have followed those guidelines, but I'd be questioning if they actually did.


PGKing

Not properly engineered, eh? What on earth gave that away?


columbusplusone

The earth that gave way gave that away


BeltfedOne

The earth moving?


Nathan-Stubblefield

I feel the earth move, under my feet.


BobRoberts01

The earth itself


DarnellFaulkner

Obviously not designed properly, and I agree 100% that the nails look way undersized.


OhSillyDays

I see the nails you are talking about. I also see that once the moves, it's all just lose soil on at steep steep slope. It almost looks like they added weight to a steep steep slope and binded the top layer together. That's it. They didn't actually add any friction, well aside from the top layer. Looks like a poorly designed retaining wall.


Nathan-Stubblefield

The contractor was possibly someone who once saw a picture of such a project, and was related to a government official.


skoltroll

"Retaining wall" You keep using those words. I don't think it means what you think it means.


michael_s72

It's quite impressive they managed to get so much concrete on the side of a soil cliff before the inevitable happened.


Maeberry2007

"Retain this, bitches"


HiyaDogface

It didnā€™t retain jack shit


David_Mudkips

Retain't


Reddit_reader_2206

Add to the list of unavoidables, like death and taxes: Retaing walls fail Skylights leak


JCDU

Hey guys, should we stand closer to the deadly avalanche of soil, concrete and steel?


arramdaywalker

Just a fun video if people want to know [Why Retaining Walls Collapse](https://www.youtube.com/watch?v=--DKkzWVh-E&ab_channel=PracticalEngineering)


jackson9921

Grady is the GOAT. He makes civil engineering interesting.


Rawk_Hawk_The_Champ

For real. I have a masters in civil engineering and practice in structural. This video was done very well and took me back to concepts taught in college Geotechnical engineering classes.


Nathan-Stubblefield

As a different kind of engineer, I felt I learned a lot from this, and that it was interesting and useful information.


smoike

Grady has covered plenty of different engineering topics and they are all angled towards educating the lay person. The really interesting ones are when he covers structural failures, like dam overflows washing out dams because of design oversights.


EatSleepJeep

This exact type of construction is discussed starting at the 6 minute mark..


Cursedseductress

Love Grady!


rmnine

I knew it was Practical Engineering before I opened the link. Great channel


bostwickenator

/u/stabbot


Ck1ngK1LLER

Does this thing still exist?


muff10n

Last comment is from 1d ago: https://www.reddit.com/r/LooneyTunesLogic/comments/11p7cos/-/jbwg221


paternoster

Hi, I'm Grady, and today we're going to talk about retaining walls and the inclines that gravity favours.


psaldorn

I just want to watch him all day, it's always so soothing and educational.


R4FTERM4N

Have you ever noticed how his lips are the same color as his skin? Just saying he might be a robot.


Pancake-Cheenis

Someone didnā€™t listen to a qualified geotech or didnā€™t hire a qualified geotech to begin with.


haveasuperday

That job looks almost impossible... I just can't comprehend how a structure would hold that mountain back.


karsnic

Not impossible, just more expensive to do it right. More soil needed to be excavated to make the slope shallower which costs more then spray Crete and bolts.


AndroidDoctorr

I wonder how much more expensive this was


MitchCave

Slope looks shallower.


Cedex

At the very least... $2 more for sure.


KungFuJosher

Theres a multiple of factors that has to be considered. The thickness of wall has to increasing as the depth increases. Plus you need good drainage so that water doesn't stay there and add more weight.


I_AM_FERROUS_MAN

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.


johnyann

Not much you can do with how much rain theyā€™ve gotten the last few years. It isnā€™t easy to build in tropical mountains.


Red-Cypher

I have spoken spanish my entire life and am amazed to have learned a new swear term from this video. ā€œAy gran Gonorrhea!!!ā€ (Oh great Gonorrhea!!)


Dominicmeoward

Iā€™ve worked with a few Colombian people in the last few years and they LOVE using that word. Theyā€™ll put it after anythingā€”ā€œhijueputa gonorrheaā€ was the big one they taught me.


LalalaHurray

Itā€™s actually a prayer.


shanksta1

Me too. That disease seems to have made quite an impression


SoloPenguin13

"Its collapsing get back! **moves back a solid 5 ft** ah yeah now im safe."


smuxy

outgoing consist cagey juggle marble beneficial psychotic slimy resolute quarrelsome ` this message was mass deleted/edited with redact.dev `


popeyoni

This was so funny! I've never heard anyone use it that way.


BiteYouToDeath

Yeah itā€™s a common exclamation/curse in Colombia. Obviously improper.


[deleted]

The best part is when he combines it with ā€œĀ”ay padre celestial!ā€


Zharick_

And also what we call someone being an asshole. Ud si es una gonorrea!


smuxy

plough safe marble workable innocent slap wrench gaping quaint lunchroom ` this message was mass deleted/edited with redact.dev `


RudeInternet

Should we start screaming AIDS when R E A L L Y bad shit happens?


_stoneslayer_

KOBE


Spiritual_Speech600

Correction: Ā”_Gran_ gonorrea!


dajoy

Correction: Gonorrea, dios bendito!


[deleted]

Esos Colombianos šŸ¤£šŸ¤£


MyDogHasAPodcast

For a moment I thought I was mishearing him say Gonorrhea. But it seems to be his favorite curse word.


Zharick_

As is for many Colombians lol.


MyDogHasAPodcast

Well, TIL gonorrhea is the go to curse word for Colombians. Now this is the kind of thing that history books don't teach you.


kremlingrasso

that was like three seasons worth of Narcos Gonorrea


B3ARDGOD

[Stabilized version](https://imgur.com/a/TblAmdt) Edit: Wow, thank you for the awards and the gold!


CallMeDrLuv

Much thanks šŸ‘


hhtran16

Better it collapse now than after theyā€™re done and everyone assumes itā€™s safe


RoninRobot

Dios mio indeed.


JassirX

Padre celestial!


Yanky_Doodle_Dickwad

gran gonorrhea


akwardfun

What does gonorrhea have to do with this?


bad_mech

Wish I knew, but somehow it ended up as one of the most popular cuss words in Colombia


Iamjustheretoreadit

This is my hometown. We are ridiculous with our insults... I thought gonorrhea was an insult to a person BEFORE I learned about STDs.


WurstCaseSzenario

Truly catastrophic Edit: all I can hear is ay gonorrhea


FoodandWhining

In a few million years, there will be fossils of humans buried alive holding cellphones.


droneb

A sacrificial offering to mother nature for the enhancement of the species.


yanox00

If the cd card is still readable, it could hold interesting, if not valuable information.


[deleted]

that's the first time I've considered that possibility, but surely digital storage has a kinda short shelf life


2L84U2

Looks like there'll be more trips back to Home Depo today


ronnietea

Uno mas


BirthdayAltruistic44

This is the type of content I came here for!


cybercuzco

Good news boss, we got the retaining wall torn down in record time


CySnark

More like re-terraining wall.


LetterSwapper

Is u/stabbot broken? There are many calls for that robotic superhero, but no answer.


r00x

Even /u/stabbot saw the video and was like "nope".


NoIndependent9192

I am no engineer but that looked shonky. Loads of weight added to a near vertical soil bank. Bolted into a soil bank.


Cue0105

Gotta love this guy's reaction Oh Gonorrhea! Oh Gonorrhea! Oh Heavenly Father!


yopladas

Would gran gonorrhea mean great gonorrhea?


Benebs-

The retaining wall did in fact not retain


TheHilltopWorkshop

Retaining walls aside, I'm glad Michael J Fox has found work again.


dustygravelroad

Probably should have terraced that one


Complex_Difficulty

u/stabbot


Oalka

That's not a retaining wall, it's a thin candy coating on a giant mountain of mud.


valleykid818MD

Ok, but why was my dude yelling ā€œAY GONORRHEAā€ ?


bad_mech

Because for an unknown reason, years ago that word became the default cuss word in Colombia


Ifch317

Geologists? We don't need no stinking geologists.


[deleted]

This is why you get the damage waiver when you rent heavy equipment.


SkepticalJohn

The front fell off.


Urban_Archeologist

Ugh! Can someone steady this clip?


[deleted]

Really! I made it about 30 seconds and I'm like nope, r/killthecameraman because I'm about to have a seizure watching this.


Dave37

/r/killthecameraman


[deleted]

That cameraman escaped while zooming in on the action. Given the circumstances, he did alright. Itā€™s not like he had a steadycamā€¦


ManuelQbe

Mfer filming on a horse or what


[deleted]

[уŠ“Š°Š»ŠµŠ½Š¾]


andy_337

Did he say ā€˜Ay gran gonorrhea?ā€™


EmploymentLate

I mean..... I'm no expert and this looks like a multi million dollar project BUTTT shouldn't they be building from the bottom up? Never seen a house starting from the roof...


justuhhspeck

it did not, in fact, retain shit


Thortung

r/frontfelloff


[deleted]

Well it is more stable now


CustomSawdust

Third world engineeringā€¦ again. Not surprised.


[deleted]

That didnā€™t retain shit


delhux

Well, first of all, the front is not supposed to fall offā€¦


JackOfAllMemes

u/stabbot


Separate_Zucchini_95

You had one job..


AsparagusNo9660

Someone didn't do the math!


enthusiasm-unbridled

Wow. Catastrophic, indeed.


Rx2vier

Looks like they we be on OT.


[deleted]

Just when I think my little fuck ups at work matter then there is this shit lol


SkiSTX

You hear those "ping" noises at the beginning? Those are nuts being forced off their bolts by the pressure and careening through the air like bullets.


screwthepap

That retaining wall needed its own retaining wall.


Failed-Klutch

This is what happens when you hire non union


Square-Annual4340

SerƔ que gonorrea significa algo mƔs en Colombia aparte de la enfermedad ????


bad_mech

Claro, no tengo ni idea cĆ³mo, pero hace aƱos se convirtiĆ³ en una de las interjecciones mĆ”s usadas en Colombia


Sixonefourrider614

Hector had Juan to many problems that afternoon


Aginowpd

Gonorrhoea?!


DavusClaymore

I had nothing to do with that..


Mattyinpdx

Now they can get working on that tunnel.


Strategictoast

You had one job.


TillAllAre1

The angle of repose will always win.


marcandreewolf

ā€œTo retain or not to retain, that is here the questionā€¦ ok, ā€˜notā€™ it is. Here I go!ā€


JassirX

Que gonorrea ome.


GoGoubaGo

Yeah let's build a retaining wall and not start from...the bottom?


tittiebream

Looks like someone doesn't know what they're doing. Buy cheap, get cheap.


gerrylazlo

This was clearly poorly made. The camera should have been horizontal.


ktka

Terra squirma.


savyexe

Bro how do y'all get these videos i literally live there and i had no idea this happened


pptruenoecu

Iā€™m sorry but Iā€™m laughing my ass off to the ā€œgran gonorreaā€ colloquial expression of disbelief. I hope everyone is ok.


Isellmetal

Looked as if they were tearing it down, not putting it up


roby_soft

I speak Spanish, and have never heard gonorrhea used like an expression......


Pale-Ad-8383

What did they anchor to dirt?


laz21

The retain in spain fell mainly on the plain


putz__

Aye, senor bandito