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Consider the following statements: Problem regarding foundations to be constructed in expansive soils are solved by 1. Resorting to light foundation pressure. 2. Using under-reamed piles for light loads 3. Making the structure rigid enough so that settlement and uplift would not affect them 4. Providing a well-designed basement with the foundation below the neutral point Which of the above statements are correct?

Consider the following statements: Problem regarding foundations to be constructed in expansive soils are solved by 1. Resorting to light foundation pressure. 2. Using under-reamed piles for light loads 3. Making the structure rigid enough so that settlement and uplift would not affect them 4. Providing a well-designed basement with the foundation below the neutral point Which of the above statements are correct? Correct Answer 2 and 4

The following methods are reduced the swelling potential of expansive soils:

1.  Provide the impervious or flexible apron around the structure because the flexible apron is liable to pushed up when swelling occurs.

2. Making downward load large enough to exceed the swelling pressure.

3. Pre-wetting the ground to moisture content equal to equilibrium moisture content.

4.  When swelling soils are to be used in fills, compaction is carried out by light compaction equipment at water content on the wet side of optimum so that the swelling potential is reduced.

5. Mixing of lime with swelling soil in a suitable proportions is quite effective in controlling the swelling. The addition of lime would make difficult for the cations in pore water to displace the Ca cations of the clay mineral of the swelling soil.

6. Use of under reamed piles.

7. Light foundation structures means that low bearing capacity of soil. The foundations designed for such small bearing capacity were not able to counteract the swelling pressure. Therefore, foundations shall be designed for as high bearing pressure as possible.

8. Providing a well-designed basement with the foundation below it.

Related Questions

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