Determination of the settlement characteristics of a soil deposit is frequently attempted by one of, or combination of, several methods. Describe these methods.
Determination of the settlement characteristics of a soil deposit is frequently attempted by one of, or combination of, several methods. Describe these methods.
When soil mass is subjected to a compressive force, like all other material its volume decreases.
Total settlement of soil is expressed as;
St=S immediate+ S consolidation
Immediate settlement:- If the soil is initially partially saturated expulsion of air as well compression of pore air may take place with the application of external load which is called initial compression. It is a immediate phenomenon.
After the initial compression , soil reaches into fully saturated state, further reduction in volume occurs due to expulsion of pore water that is a water present in the soil.
Immediate settlement can also occur if significant lateral strain takes place. this immediate settlement can be calculated from elastic theory.
settlement analysis-is an analysis that predicts the magnitude of settlement that a structure which is founded above a buried clay layer is likely to undergo and the rate at which the settlement take place. the methods of computing these have been outlined of assuming 1-dimensional consolidation of drainage in the clay layer.
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