Hello everyone,
Has anyone ever had to use a special foundation method like pile foundations, pier foundations, or ground improvement (CSV) due to poor soil bearing capacity? Our soil consists of about 80 cm (31 inches) of topsoil, followed by a 4 m (13 feet) layer of weak, non-bearing soil, before reaching a load-bearing layer.
What solution did you choose, and what were the approximate costs? Soil replacement is not an option for us. How were you able to estimate the costs beforehand? Most groundwork contractors require the full structural engineering calculations of the house, including geotechnical engineering, but these are usually not provided by the builders before signing the contract, and certainly not for free. We have not yet purchased the plot, but it would be ideal for us. Now we are considering how to approach this without incurring a large amount of upfront costs while still being able to roughly estimate the total effort involved. We would appreciate any shared experiences.
Best regards
Has anyone ever had to use a special foundation method like pile foundations, pier foundations, or ground improvement (CSV) due to poor soil bearing capacity? Our soil consists of about 80 cm (31 inches) of topsoil, followed by a 4 m (13 feet) layer of weak, non-bearing soil, before reaching a load-bearing layer.
What solution did you choose, and what were the approximate costs? Soil replacement is not an option for us. How were you able to estimate the costs beforehand? Most groundwork contractors require the full structural engineering calculations of the house, including geotechnical engineering, but these are usually not provided by the builders before signing the contract, and certainly not for free. We have not yet purchased the plot, but it would be ideal for us. Now we are considering how to approach this without incurring a large amount of upfront costs while still being able to roughly estimate the total effort involved. We would appreciate any shared experiences.
Best regards
N
Nordmanne_866 Nov 2020 08:59I don’t have any direct neighbors, and the soil is neither moorland nor peat; overall, the area has low moisture levels.
We have received the soil report, where a pipe was driven into the ground using a type of pneumatic hammer. We were given a foundation recommendation, but do we now also need to carry out foundation work using a core drilling rig or something similar for the special foundation?
We would like to build a bungalow measuring 15m × 13m (49ft × 43ft) with a garage measuring 7m × 6m (23ft × 20ft) attached directly to the house with an entrance.
@AMNE3IA: What kind of house did you build, and what are its dimensions?
We have received the soil report, where a pipe was driven into the ground using a type of pneumatic hammer. We were given a foundation recommendation, but do we now also need to carry out foundation work using a core drilling rig or something similar for the special foundation?
We would like to build a bungalow measuring 15m × 13m (49ft × 43ft) with a garage measuring 7m × 6m (23ft × 20ft) attached directly to the house with an entrance.
@AMNE3IA: What kind of house did you build, and what are its dimensions?
N
Nordmanne_866 Nov 2020 10:26The report mentions pile or caisson foundations. Alternatively, ground improvement using CSV or a similar method could be done, according to the report.
N
Nordmanne_866 Nov 2020 12:41Yes, that is stated in the report. The main question was not what should or can be done, but rather the costs involved with special foundations 🙂
Therefore, it would be helpful to get some experience-based information regarding the number of supports and their depth, and perhaps details about the house as well.
Of course, I understand that I can only use this information as a rough estimate.
Therefore, it would be helpful to get some experience-based information regarding the number of supports and their depth, and perhaps details about the house as well.
Of course, I understand that I can only use this information as a rough estimate.
