Soil Consolidation Part 3

KAEA 3233 - SOIL MECHANICS II

Department of Civil Engineering

Faculty of Engineering

University of Malaya

Time Rate of Consolidation

Time Rate of Consolidation

Time Rate of Consolidation

Time Rate of Consolidation

Time Rate of Consolidation

Time Rate of Consolidation

Time Rate of Consolidation

Time Rate of Consolidation

Time Rate of Consolidation

Time Rate of Consolidation

Average degree of consolidation

Coefficient of Consolidation, Cv

Coefficient of Consolidation, Cv

Coefficient of Consolidation, Cv

Coefficient of Consolidation, Cv

Example 6

Example 7

A soil profile is shown in figure. A surcharge load of 96 kN/m2 is applied on the ground surface. Determine the following: a) How high the water will rise in the piezometer immediately after the application

of load. b) After 104 days of the load application, h = 4 m. Determine the coefficient of

consolidation (cv) of the clay soil.

Example 8

Example 9

Example 10

Precompression

Precompression

• Method to speed up the flow of water from the soil mass so that maximum settlement can be accelerated for highly compressible soil (increase the rate of settlement).

• The flow distance must be smaller than the thickness of the clay layer

• If the clay layer is thin, the use of vertical drain is uneconomical

Vertical Drain

Vertical Drain

Vertical Drain

Vertical Drain

Vertical Drain

Vertical Drain

Vertical Drain

Vertical Drain