Building Construction
In places where the soil is soft and has small resistance to the flow of concrete, which one of the following types of piles, is used

Vibro pile
Franki pile
Pressure pile
Pedestal pile

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

A tube of about 2 meters length and 20 cm diameter with a cutting edge
All listed here
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

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