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BEARING CAPACITY OF SOIL Presentation By :Hardeep G Kotian 2nd year Civil Engineering K.P.T

Bearing Capacity of Soil Bearing capacity of the soil is its ability to support the load coming over its unit area without excessive settlement and displacement.

Ultimate Bearing Capacity Of Soil The minimum load on unit area ,causing failure, is called the Ultimate bearing capacity of Soil.

Safe Bearing Capacity Of Soil (SBC) The value of the permissible loads taken for the purpose of design is known as Safe Bearing Capacity.

Determination Of Safe Bearing Capacity Of Soils Plate load Test Dropping weight or Penetration test method Method of loading Presumptive values of bearing capacity of soils

Plate Load Test Method

Definition:This is a field test for determining the ultimate bearing capacity of soil. The test consists of loading a steel plate placed at the foundation level and recording the settlements corresponding to each load increment.

Procedure Of Plate Load Test A pit is dug at site up to the depth at which the foundation is proposed to be laid. The load is applied to the test plate through a centrally placed column. The loading to the test plate is applied with the help of a hydraulic jack. The load to the plate is given with the help of sand bags, stones or concrete bags.

3 . The load is applied in convenient increments say of about one-fifth of the expected safe bearing capacity. The settlement of plate is recorded by means of dial gauge. The load is directly recorded from the pressure gauge of the hydraulic jacks. The observations are plotted on a graph. At the points where graph sharply takes a turn is the ultimate bearing capacity.

SPT Test

Methods Of Improving The SBC Compacting the soil Increasing the depth of foundation Increasing the width of foundation Drainage of soil Sheet piling Grouting Replacing the poor soil Chemical By using Geo-textiles

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