The Construction Method of the Spiral Heat Pipe Annular Convex Rib Drainage and Grouting Bamboo Pile

Abstract

The invention relates to a construction method for bamboo joint piles based on sequential water drainage and grouting of spiral heat pipes and annular ribs. The construction method includes the stepsof hole formation of steel pile casing protection walls, hole bottom ramming for expansion, prefabrication of expanded pile toes, mounting of filter geotextile bags surrounding the piles, connection of spiral steel pipes, connection of the bamboo joint piles, ramming of graded gravel surrounding the piles, post-grouting and the like. Formed foundation pile structures comprise rammed bottom ends, expanded bottom leveling layers, the expanded pile toes, the bamboo joint piles, the circulating heat pipes, the filter geotextile bags, the rammed externally-expanded bodies and the like. The heat exchange with the underground can be realized to achieve the effects of energy conservation and emission reduction; the side friction of the bamboo joint piles is improved effectively through the annularribs and the spiral steel pipes; by the sequential water drainage and grouting process for graded gravel surrounding the piles, the pile side friction is further increased, and foundation settlementafter construction is reduced. The construction method has the advantages of high bearing capacity of pile foundations, high construction efficiency, reuse of building waste materials, energy conservation and environmental protection, thereby having good economic and technical benefits.

Description

technical field [0001] The invention belongs to the technical field of building pile foundation engineering, and in particular relates to a construction method of bamboo joint energy piles. Background technique [0002] The original intention of introducing the PHC bamboo pile is to increase the frictional resistance around the pile with the help of its annular convex rib, thereby increasing its ultimate bearing capacity. The commonly used construction methods include direct hammering penetration method, hammering sand filling method, high spray core method, Static drilling rooting method, etc. The vertical compressive ultimate bearing capacity of PHC bamboo piles constructed by direct hammer penetration method is more than 25% lower than that of ordinary prestressed pipe piles; the ultimate bearing capacity of single piles of PHC bamboo piles constructed by the latter three methods is average The increase is 20-30%. However, the hammer sand filling method is difficult to c...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high difficulty in construction, great variation in bearing capacity, great environmental impact, and no further effect on environmental protection after the completion of pile foundation construction during the construction of bamboo piles, and proposes a spiral heat pipe annular Construction method of bamboo joint pile with convex rib drainage first and then grouting

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