What is the effect of the water table on the bearing capacity of a foundation?

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Question: What is the effect of the water table on the bearing capacity of a foundation?

Options:

Correct Answer: Decreases bearing capacity

Solution:

The presence of a high water table can decrease the effective stress in the soil, thereby reducing the bearing capacity of a foundation.

What is the effect of the water table on the bearing capacity of a foundation?

What is the effect of the water table on the bearing capacity of a foundation?

Step 1: Understand what the water table is. The water table is the level below the ground where the soil is completely saturated with water.
Step 2: Know what bearing capacity means. Bearing capacity is the ability of the soil to support the weight of a structure without sinking or collapsing.
Step 3: Learn about effective stress. Effective stress is the stress that contributes to the strength of the soil. It is calculated by subtracting the water pressure from the total stress in the soil.
Step 4: Recognize how a high water table affects effective stress. When the water table is high, the water pressure in the soil increases, which reduces the effective stress.
Step 5: Understand the impact on bearing capacity. Since effective stress is lower due to the high water pressure, the soil's ability to support weight (bearing capacity) decreases.

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