Building a house - Sub Structure / Foundations
-
- MerkinMaker
- Reactions: 62
- Posts: 3232
- Joined: Wed Mar 21, 2012 11:04 am
Joking aside, if you want to do some more reading on this the term you are looking for is hydrostatic uplift. There are lots of solutions, but they won't be cheap and will be way above the pay grade of uncle Heng the village builder.
Pretty sure this applies to clay only, and usually when tank is empty or near to it.starkmonster wrote:Joking aside, if you want to do some more reading on this the term you are looking for is hydrostatic uplift.
Buoyancy?There's a reason something as heavy as an aircraft carrier can float,
"Not my circus, not my monkeys" - KiR
Just been talking with my Khmer engineer mate. He works for the borey company building on the Northbridge land. They are about to build several 20 level towers on the land that was the pretty lake in the Northbridge grounds. They will excavate several metres deep and then drive in piles, no problem at all apparently. I will give it a good coat of looking at next month.
Thanks for the replies, they make the brain churn over and then one looks at solutions / options.
The land I'm looking at is about 4 ft lower than the road but on par with all other land in the area,
Flooding is not a real issue, but there will be a substantial amount of ground water around for a day or two if a torrent of rain happens,
But it all slopes to the rear, so will not gather around the proposed house site.
The land is about 22mtrs wide and 80mtrs deep
Rather than try to infill the the entire plot, I was considering - stepping it down into 3 levels
Area 1)
The land closest to the road and where I want to build the house on,
Dig out a basement, lay foundations, support walls and build the house on these foundations .
Make use of the sub floor area for a temperature controlled environment for sleeping or other projects ( Mushrooms, hydroponics - stuff like that )
Area 2)
The land immediately behind and to the side of the house ( starting approx 25 mtrs from the road and ending about 65 mtrs towards the end of the plot)
In fill it to be about 2ft lower than level 1), Make use of this area to amuse myself with whatever I want to grow/produce in this area.
Area 3)
A sink hole to collect water being drained from level 1 + 2 and to be use to provide water as required
The land I'm looking at is about 4 ft lower than the road but on par with all other land in the area,
Flooding is not a real issue, but there will be a substantial amount of ground water around for a day or two if a torrent of rain happens,
But it all slopes to the rear, so will not gather around the proposed house site.
The land is about 22mtrs wide and 80mtrs deep
Rather than try to infill the the entire plot, I was considering - stepping it down into 3 levels
Area 1)
The land closest to the road and where I want to build the house on,
Dig out a basement, lay foundations, support walls and build the house on these foundations .
Make use of the sub floor area for a temperature controlled environment for sleeping or other projects ( Mushrooms, hydroponics - stuff like that )
Area 2)
The land immediately behind and to the side of the house ( starting approx 25 mtrs from the road and ending about 65 mtrs towards the end of the plot)
In fill it to be about 2ft lower than level 1), Make use of this area to amuse myself with whatever I want to grow/produce in this area.
Area 3)
A sink hole to collect water being drained from level 1 + 2 and to be use to provide water as required
I refuse to go out with nothing more than a whimper followed by a small farting sound and a shit stain on my bed sheets..
Just thought I'd share that with you.
Just thought I'd share that with you.
-
- Permanently Banned
- Reactions: 94
- Posts: 1970
- Joined: Tue Feb 02, 2016 10:42 am
Having 2 concrete floors on top of a basement is usually enough to avoid the whole structure including basement starting to float. Your concrete volume should be around 1/8 of the volume of the basement, then you get to the safe side. If your ground/first/second floor is made from low-weight baked stones, you may get into troubles. Use concrete throughout.scoffer wrote:I'm investigation the option of building a house with a basement.
The land I'm looking at needs a lot of in fill to bring it up to street level.
So I'm thinking I might dig down another 6-8 ft and put in a basement and build the house on top of this sub structure.
Suggestions on sourcing a competent engineer / builder to discuss this with would be appreciated.
The moment ground water level will be above the basement floor you need serious measures to keep the water out. I would say, ground water level should even be some 1-2 feet below the basement floor, because of capillary creep, resulting in water collection on your basement floor.
Not to speak about water that simply "flows" into the basement through normal openings (ventilation, access, etc). Let alone the expected cracks in the basement wall, maybe even before finishing the construction.
A lot of Dutch people have their houses below sea level, though they solve the water problem, using external waterworks (channels, dikes, fingers in dikes, etc). And even then, every 10-20 years, some panics arises and whole towns/areas get evacuated because of imminent flooding. Despite that, Dutch engineers are invited around the world for major waterworks.....
Advise: Think in building on stilts. When having a car, prepare for a construction to have the car lifted from the ground floor, just in case a once in 5-10 years major flooding (Thailand not so long ago, remember ?) shows up.
When you persist on a basement, consider a house on a mound, where your basement is again at ground floor (street) level.
Ground water coming in is no problem as long as you waterproof the basement (or just use good quality concrete to begin with)
We have indoor parking places in Holland that go down to -22 meter with groundwater levels at -1M.
There hasn't been panic over here since the 50's when the south-west flooded after a big storm. The reason some area's get evacuated nowadays is when extremely high peak levels in the rivers are expected and they use low laying area's near the river as a buffer to take the edge of.
We have indoor parking places in Holland that go down to -22 meter with groundwater levels at -1M.
There hasn't been panic over here since the 50's when the south-west flooded after a big storm. The reason some area's get evacuated nowadays is when extremely high peak levels in the rivers are expected and they use low laying area's near the river as a buffer to take the edge of.
None but ourselves can free our mind.
Sure, though it comes with some major technical capabilities (short term as well as long term) not present in Cambodia. Even in Thailand, car parkings are the first couple of stories of sky scrapers, they don't go down. And the subway closes down, when flooding threatens.Visser wrote:Ground water coming in is no problem as long as you waterproof the basement (or just use good quality concrete to begin with)
We have indoor parking places in Holland that go down to -22 meter with groundwater levels at -1M.
You may have been missing the news on this. No personal casualties, though major financial damages due to several events.Visser wrote:There hasn't been panic over here since the 50's when the south-west flooded after a big storm. The reason some area's get evacuated nowadays is when extremely high peak levels in the rivers are expected and they use low laying area's near the river as a buffer to take the edge of.
-
- Similar Topics
- Replies
- Views
- Last post
-
- 23 Replies
- 5700 Views
-
Last post by kungfufighter
Wed Jan 08, 2020 3:04 am
-
- 30 Replies
- 7183 Views
-
Last post by kansaicanuck
Sun Jun 30, 2019 9:53 pm
-
- 19 Replies
- 5535 Views
-
Last post by spitthedog
Tue Jul 02, 2019 4:45 pm
-
-
Building a multi-purpose facilites
by nasruddin » Sat Sep 07, 2019 3:12 pm » in Questions and Answers - 1 Replies
- 1202 Views
-
Last post by Lucky Lucan
Sat Sep 07, 2019 8:02 pm
-
-
-
Is living in a Highrise Building good ?
by Expatissimo » Sat Sep 11, 2021 10:30 pm » in Houses, Apartments and Real Estate - 25 Replies
- 6422 Views
-
Last post by YaTingPom
Thu Sep 16, 2021 7:58 am
-