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Soil Investigation
Soil testing rig, which is not
suitable for rock or large obstructions. The rig can also place
instruments in the ground, which record ground water pressure.
Soil Investigation is carried out for designing a right type of
foundation safely and economically, a designer must possess
sufficient information about the physical properties and the
arrangement of underlying materials. The field and laboratory
investigations required to get this essential information is known
as soil exploration. The study of complete soil investigations can
be grouped under the following heads,
1. Objectives or purposes,
2. Preliminary investigations,
3. Methods of site exploration,
4. Depth and spacing of trial pits and borings,
5. Choice of a method,
6. Recording of data.
Objectives of Soil Investigation :
The objectives of an engineer, before starting the exploration work,
should be to collect the following information:
1. The nature, thickness and variation of soil strata in the region.
2. Procuring representative samples for assessing the physical
properties of the soil strata encountered, which in turn will help
in the design and mode of construction of
the proposed foundations.
3. The seasonal variations in ground water table and their possible
effects on the soil .
4. The approximate values of strength and compressibility of soil
bed.
5. The depth of underlying rock bed, when necessary.
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