| 摘要 |
<P>PROBLEM TO BE SOLVED: To form firm foot protection with no anxiety in carrying out foot protection of foundation concrete. Ž<P>SOLUTION: When a concrete pile is inserted in a pile hole, the pile is once stopped halfway and hung inside. Crushed stones are thrown in using a center hole of the pile to form a crushed stone layer at the bottom of the pile hole to thereby form a foot protection part of the pile. The pile is then lowered to stabilize the pile with the crushed stones. Construction work can thereby be expedited by about one day compared with a conventional method of forming foot protection with cement milk and waiting for solidification to perform foundation work on the pile. Furthermore, concrete milk is injected into the pile hole to firmly solidify the foot protection part. An accident caused by settlement is thereby prevented even after the completion of a structure. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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