Prestressed concrete steel pipe congruent pile and its manufacture and construction method

Abstract

A method for preparing prestressed concrete steel-tube polypile includes sleeving steel-tube with large diameter over prestressed concrete tubular pile, using end sealing component to connect the two together and injecting grout materials into gap between the two, erecting pile shoe at bottom of said pilypile for pile sinking.

Description

technical field [0001] The present invention relates to a prestressed concrete composite pile structure and its manufacturing and construction method, especially to a kind of high bearing capacity, high hammer impact resistance and high penetrability suitable for impact pile sinking construction method engineering. Prestressed concrete steel pipe composite pile. Background technique [0002] In the prior art, prestressed concrete pipe piles are widely used in domestic pile foundations where the horizontal force has little effect on the pile body due to its abundant raw materials, low price and large axial bearing capacity. The low load leads to poor bearing capacity in the horizontal direction, and it is prone to fracture when bearing large horizontal loads (such as wind loads and earthquake loads). [0003] In order to improve the bearing capacity of the pile foundation in the horizontal direction, a steel-structured I-shaped steel pile has been adopted in pile foundation ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, prestressed concrete pipe piles are widely used in domestic pile foundations where the horizontal force has little effect on the pile body due to its abundant raw materials, low price and large axial bearing capacity. The load capacity is low, resulting in poor bearing capacity in the horizontal direction, and it is prone to fracture when bearing large horizontal loads (such as wind loads and earthquake loads).

[0003] In order to improve the bearing capacity of the pile foundation in the horizontal direction, a steel-structured I-shaped steel pile has been adopted in pile foundation engineering in recent years, which has strong bending resistance and can bear large horizontal loads, but due to The main raw material of the H-shaped steel pile is steel, and its manufacturing cost has soared significantly compared with the concrete pipe pile, so it cannot be widely used in various domestic construction projects

[0004] In order to improve the vertical and horizontal bearing capacity of prestressed concrete pipe piles, the existing patent application number: 200610010620.9 invented thick-walled prestressed concrete pipe piles, although the corresponding bearing capacity can be improved in theory, but because it uses The method of continuous centrifuge superimposing concrete in the "thin-wall" prestressed concrete pipe pile leads to large prestress on the outer part of the concrete on the entire cross section of the pipe pile, and close to the center, the superimposed concrete prestress is small or even has no prestress, so During the piling process, it is easy to break the unprestressed concrete part, and the pile body is heavy, which makes transportation and construction difficult

Images