Piling immersed pipe

Abstract

The piling sunken tube features its bottom wall thickness greater than that in upper part and its slightly smaller inner diameter in the bottom. By means of the sunken tube and corresponding piling method, the diameter ratio between the enlarged pedestal and the pile column may reach 1.5, and the routine enlarged pedestal has area up to 2.3 sq m and bearing capacity up to 270 T. Owing to the setting sunken tube, dry soil taking and air sucking, the pedestal enlarging process can clean the bottom of pile to reach the effective factor of 1.00. The existence of the sunken tube can ensure the reliability of the enlarged pedestal, and the bottom may be enlarged sufficiently and accurately.

Description

[0001] This application is a divisional application with the application number of 97105261.1, the application date of 970718, and the name of "immersed tube prefabricated steel concrete expanded bottom pile and its pile forming method and equipment". Technical field: [0002] The invention relates to pile-forming equipment for prefabricated steel concrete expanded bottom piles with immersed tubes, in particular to a special immersed tube for pile-forming. Background technique: [0003] my country's coastal areas are all soft soil foundations. At present, in the pile foundation engineering of soft soil foundations, three types of piles are generally used: immersed tube piles, prefabricated piles and large diameter bored piles. Among them, the large-diameter bored pile has the highest bearing capacity, but its cost is high, its work efficiency is low, and the pollution is serious during construction. Therefore, it is generally only used in buildings with high bearing capacity...

AI Technical Summary

Problems solved by technology

The reason is that the mud at the bottom of the pile cannot be removed, which will lead to the settlement of the pile

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