What is the effect of water table rise on the bearing capacity of soil?

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Question: What is the effect of water table rise on the bearing capacity of soil?

Options:

Correct Answer: Decreases bearing capacity

Solution:

A rise in the water table typically decreases the effective stress in the soil, leading to a reduction in bearing capacity.

What is the effect of water table rise on the bearing capacity of soil?

What is the effect of water table rise on the bearing capacity of soil?

Step 1: Understand what the water table is. The water table is the level below which the ground is saturated with water.
Step 2: Know what bearing capacity means. Bearing capacity is the ability of soil to support the weight of structures built on it.
Step 3: Learn about effective stress. Effective stress is the stress that contributes to the strength of the soil, calculated as total stress minus pore water pressure.
Step 4: Recognize that when the water table rises, the pore water pressure in the soil increases.
Step 5: Realize that an increase in pore water pressure reduces the effective stress in the soil.
Step 6: Understand that a decrease in effective stress leads to a lower bearing capacity of the soil.
Step 7: Conclude that a rise in the water table typically decreases the bearing capacity of soil.

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