High-bearing-capacity micro-settlement shearing resistant prestressed pipe pile and design and construction methods thereof

Abstract

A high-bearing-capacity micro-settlement shearing resistant prestressed pipe pile is provided with a cylindrical prestressed reinforced concrete pile body and is characterized in that a grouting pipe is arranged in a pipe cavity or the pipe wall of the prestressed pipe pile, a pile large end formed by cement slurry poured in after pile forming is arranged at the end of the pipe pile, and a reinforcement cage is placed into the pipe cavity and concrete is poured when the material strength of the pile body is smaller than the sum of side resistance and end bearing capacity of the soil layer to form a reinforced concrete pile core. Compared with the originally designed punched and drilled pile, the engineering pile production price can be reduced by 50-70%, the construction period is shortened by 60-70%, mud pollution is avoided, the field is clean and civilized, and the post-construction settlement amount is small. Compared with the existing prestressed pipe pile, the single pile bearing capacity of the prestressed pipe pile is greatly improved, the number of the piles used in projects is reduced, production cost is reduced and the construction period is shortened.

Description

[0001] Technology [0002] The invention relates to the field of construction, in particular to a high bearing capacity micro-settlement shear-resistant prestressed pipe pile and a design and construction method thereof. Background technique [0003] At present, the well-known prestressed pipe piles in construction foundation engineering are factory-produced, with reliable pile quality, fast construction speed, clean and civilized site, and low cost, and are widely used in foundation engineering. my country's coastal soft soil area is complex in geology and the lateral resistance of soft soil is small. Therefore, the bearing capacity of a single pile of prestressed pipe piles in soft soil foundations is not high, which results in waste of material strength of prestressed pipe piles. It has high compressive strength, but has the disadvantage of poor shear resistance. [0004] In the area near the hills, there is often a pebble gravel layer with a small thickness in the silt lay...

AI Technical Summary

Problems solved by technology

According to the current building foundation design code, the perforated cast-in-situ piles with high cost, long construction period and mud pollution are used.

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