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On the first day some part of the pile will be driven and on the second day some part of the pile may move up due to the gain of shear strength. This is known as the wakening of the pile. By the driving force, the extra pore pressure generated is (5 – 7) times the  of the soil. Bearing capacity of the pile is 9 . Hence due to this property, maximum single length of the pile theoretically can be upto 25m but 10-12m is cast at a time. Then by splicing technique the required hired length of the pile is obtained. Special types of collars are used so that the splices become weak points. Concrete below the grade M20 is never used. |
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Pile Diameter |
Maximum length (m) |
250 |
12 |
300 |
15 |
350 |
18 |
400 |
21 |
450 |
25 |
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Fig.5.3 Generation of
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