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Identify the Method used for the dewatering of the foundation trenches. (a)Electro osmosis process

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Identify the Method used for the dewatering of the foundation trenches.

(a) Electro osmosis process

(b) Chemical process

(c) Cement grouting

(d) Freezing process

I had been asked this question in class test.

Question is taken from Deep Excavations topic in chapter Deep Excavations, Pile Foundations and Caisson of Construction & Building Materials

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The correct option is (d) Freezing process

The explanation: In the freezing process method, the area surrounding the excavation is frozen and thus a solid wall of frozen Earth is formed. The principle of ground freezing is the use of refrigeration to convert in-situ pore water to Ice.

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