Construction method of prestressed pipe pile in sand bed or pebble bed

Abstract

The invention discloses a construction method of a prestressed pipe pile in a sand bed or a pebble bed. The problem of weak anti-horizontal shear force of an existing prestressed pipe pile is solved.The construction method of the prestressed pipe pile in the sand bed or the pebble bed comprises the steps that grout diffusion holes are formed in the pipe wall of the existing prestressed pipe pile;and trepanning is carried out on a top cast iron sealing cover and a bottom cast iron sealing cover of the prestressed pipe pile, after the prestressed pipe pile is driven into a foundation, a grouting pipe is placed into the bottom of an inner cavity of the prestressed pipe pile, a plurality of steel bars with the same specification are arranged on the periphery of the outer side wall of the grouting pipe in a binding mode, the steel bars enter the cavity of the prestressed pipe pile with the prestressed pipe pile, the steel bars are used as reinforced ribs in the pipe pile, cement slurry with the proportion of 1 to 1 is poured through the grouting pipe, the cement slurry enters the sand bed or the pebble bed around the pipe pile through the grout diffusion holes of the side wall of thepipe pile to form a cement slurry reinforced body, the problem of weak bearing capacity of the sand bed or a soft rock bed on a pile body is solved, an integral cement slurry solidified body from topto bottom can be formed between interiors of various pile sections, and the anti-shear capacity of the while prestressed pipe pile is greatly improved.

Description

technical field [0001] The present invention relates to a prestressed pipe pile (commonly known as a PHC pile), in particular to a prestressed pipe pile (PHC pile) which can greatly improve the horizontal shear resistance and is installed in weak ground layers such as sand layers and pebble layers. . Background technique [0002] The pile foundation of the structure is generally set on the bearing layer of the bedrock; when the bearing layer of the bedrock is deep and the pile foundation of the structure cannot reach the bearing layer of the bedrock, prestressed pipe piles (PHC piles) are generally used as the supporting layer of the structure. Pile foundation; prestressed pipe pile (PHC) mainly relies on the friction between the outer wall of the pile body and the soil layer as the bearing capacity of the upper load; in foundation pit construction, if the pile foundation of the structure cannot reach the bearing layer of the bedrock, When the foundation pit stratum is a we...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for constructing prestressed pipe piles in a sand layer or pebble layer, which solves the technical problem that the existing prestressed pipe piles are weak in horizontal shear resistance

Images