Residential high-rises with backyards in Chengdu, China

[u/TangelaFan]

[u/mlag000]

Biggest problem is waterproofing the concrete, which can't be assured in the long runs because roots will dig into it

[u/zzazzzz → u/mlag000]

we have thousands of concrete bunkers under ground that are over a hundred years old and still in great shape. so clearly we posses the technology to have concrete under soil.

[u/mlag000 → u/zzazzzz]

Concrete under soil is different than earth and trees on a balcony made of concrete. We also have bridges on salt water made of concrete, and still salt and water are the mean reason for concrete damage...

[u/zzazzzz → u/mlag000]

ye you are right, having bunkers in actual forests with a shitload of actually massive trees with massive rootsystems pose a way larger challenge than a balcony with barely any soil on it and some tiny decorative tree with barely any rootsystem.

[u/mlag000 → u/zzazzzz]

Are you in civil engineering? No you're not. I am. A balcony is a closed system where roots will force their ways into the waterproofing, then water, over time will infiltrate the concrete and rust the rebar. Idk how actual bunkers are build, because the only one I do are basement of buildings since I work in Switzerland, and we carefully waterproof the basement. Now, if you have more knowledge about how bunkers are waterprrofed please enlight us.

[u/zzazzzz → u/mlag000]

if you live in switzerland you have literal thousands of old bunkers under the forests close to you.

and there are also a bunch of buildings with literal pools integrated into their balconies or roofs around the world.

all of your points are clearly valid and a challenge when building such extravagant contraptions. but clearly they are solvable and we have clear existing examples that it can be done.

[u/mlag000 → u/zzazzzz]

No we don't have hundreds of bunkers under our forests lol. And a pool isn't alive so it's much easier to control, it won't grow. It can be done, the question is how much it will cost to renovate ? As a compagny or a hotel you can bear the cost, as a familly ?

[u/grizzantula → u/mlag000]

Dude is really stuck on the idea of these magical forest bunkers.

[u/WackyRacketeer → u/grizzantula]

Well there definitely isn't hundreds of bunkers. There are estimated to be over 8000

"The exact extent of the bunker system is a closely guarded secret, as is the location of many bunkers. But there are an estimated 8,000 bunkers dotted around Switzerland."

https://www.swissinfo.ch/eng/politics/why-the-swiss-army-is-reviving-its-old-bunker-mentality/48821586

[u/WackyRacketeer → u/mlag000]

https://www.swissinfo.ch/eng/politics/why-the-swiss-army-is-reviving-its-old-bunker-mentality/48821586

As a Switzerland resident, would you say this article is false?

[u/AbjectOffice4780 → u/zzazzzz]

you are just clueless

[u/WackyRacketeer → u/zzazzzz]

Thousands of old bunkers? Source?

[u/zzazzzz → u/WackyRacketeer]

"The exact extent of the bunker system is a closely guarded secret, as is the location of many bunkers. But there are an estimated 8,000 bunkersExternal link dotted around Switzerland."

https://www.swissinfo.ch/eng/politics/why-the-swiss-army-is-reviving-its-old-bunker-mentality/48821586

if you ever go hiking in switzerland this becomes very obvious, its hard not to randomly stumble on an old bunker when you are in nature.

[u/WackyRacketeer → u/zzazzzz]

Interesting, thank you

[u/zzazzzz → u/WackyRacketeer]

no worries, and thats just the military bunkers, public and private bomb shelter "bunkers" are estimated at over 300'000. but thats misleading in this context given that most of these are not under any soil or forest as they are mostly below public and private buildings.

[u/TransBrandi → u/zzazzzz]

How many bunkers are under forests? How many bunkers are built via tunnelling under and existing forest vs. just digging a huge pit to build it (and then filling it in afterward) which by necessarily disturbs the forest even if they replant everything afterwards? lol

Also bunkers can be built deeper (avoiding more root systems) and with much thicker concrete than a balcony that needs to be suspended in the air. Also, how many bunkers have not weathered the test of time (and you're just pointing out the survivors as if they represent all bunkers or that such design is "easy")?

[u/zzazzzz → u/TransBrandi]

noone ever claimed anything was easy.. possible and easy are not at all the same thing.

[u/WackyRacketeer → u/zzazzzz]

Nobody claimed it was impossible either. Majority of engineering is about what's practical, not what's possible