Soil Exploration

What is soil exploration?

The process of sampling, field and laboratory investigation to obtain the physical properties of the subsoil is known as soil exploration.

Why do soil exploration?

·        To determine the properties of soil and groundwater level which affect the design and safety of the structure.

·        To determine the geological conditions of rock and subsoil

·        To select the suitable type and depth of the foundation

·        To determine the sequence, thickness, the lateral extent of the soil strata and position of bedrock

Subsurface exploration is done in the following stages:

A.  Reconnaissance:

According to this stage general investigation is done.

It helps in:

·        Deciding future programme of site investigation

·        Scope of work

·        Methods of exploration to be adopted

·        Type of sample to be taken

B.   Preliminary investigation:

It helps to determine the depth, thickness, extent and composition of each soil stratum at site

C.   Detailed investigation:

The purpose of this is to determine the engineering properties of soil in different strata

It includes:

·        Intensive boring programme

·        Sampling and testing of samples in the laboratory

·        Field tests such as vane shear test, permeability test and plate load test

 

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