Building Construction
In the method of tube boring of soil investigation, the following is essential:

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The tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand
A flap valve at the bottom of tube is provided to extract the soil sample
A tube of about 2 meters length and 20 cm diameter with a cutting edge

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Building Construction
In clay soil

Swelling and shrinkage characteristics prevail
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Differential settlement is generally prevalent
Consolidation continues even after several years of construction

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