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Methods of Soil Exploration - Soil mechanics - Civil Engineering

Methods of Soil Exploration The methods available for soil exploration may be classified as follows: 1. Direct methods: Test pits, trial pits or trenches. 2. Semi-direct methods: Borings 3. Indirect methods: Soundings or penetration tests and geophysical methods Test Pits This test is suitable only for small depths up to 3 m. For excavation of pervious soils at great depths, lateral supports or bracings are required. Useful for conducting field tests, such as plate bearing test. Test pits are usually made only for supplementing other methods or for minor structures. Boring Boring is a method of making or drilling bore holes into the ground for obtaining soil or rock samples from known or specified depths. Depending upon the type of soil and the purpose of boring, the following methods are used for drilling the holes. Types of Boring 1. Auger boring: This method is effective for subsurface investigations of highways, railways and airfields, where the depth of exploration is small. This ...
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