Steel concrete column pile and construction method thereof

Abstract

The invention provides a steel concrete column pile. The steel concrete column pile comprises a precast tubular pile, an H steel pile and an expansion part, wherein the expansion part is located at the top of the precast tubular pile, and the H steel pile is mounted at the expansion part; when the steel concrete column pile extends in the vertical direction, and in the horizontal direction, the peripheral surface of the expansion part outward exceeds the peripheral surface of the precast tubular pile; the expansion part comprises a steel barrel fixedly connected to the precast tubular pile, one end of a filled steel reinforcement cage extends into a central hole of the precast tubular pile, the other end extends into the steel barrel, and a concrete core extending into the central hole ofthe precast tubular pile is cast into the steel barrel; and after a bottom plate of an underground structure reaches the maintenance period, at least part of the H steel pile, which upwards exceeds the bottom plate, is dismounted. The invention also provides a construction method of the steel concrete column pile. The problems that the stability of a support pillar in a base pit in a soft soil layer is poorer and the water stop effect is poor can be better solved.

Description

technical field [0001] The invention relates to a steel concrete column pile and a construction method of the steel concrete column pile. Background technique [0002] At present, the supporting columns commonly used in foundation pit support mainly adopt "cast-in-situ piles + steel lattice columns". This structure has a high bearing capacity, but the construction speed is slow and the cost is high. In the construction of some foundation pits, H-shaped steel is simply used as the support column. The construction speed is fast, and it can be directly driven into the underground soil layer. Since this support column is actually a friction pile, when the soil layer under the foundation pit is relatively weak, The stability of the support column in the soil is relatively poor, and a longer support column is required to meet the needs, which not only increases the difficulty of construction, but also increases the construction cost. In addition, in order to improve the anti-twis...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor stability of the support column inside the foundation pit and poor water-stop effect in the soft soil layer, the application first proposes a steel concrete column pile, which includes prefabricated pipe piles, H steel piles and enlarged The enlarged part is located at the pile top of the prefabricated pipe pile, and the H steel pile is installed on the enlarged part; the end of the H steel pile facing the prefabricated pipe pile is called the steel pile connection end, and the end of the prefabricated pipe pile facing the H steel pile One end is called the pipe pile connection end; when the steel concrete column pile extends in the vertical direction, in the horizontal direction, the outer peripheral surface of the enlarged part exceeds the outer peripheral surface of the prefabricated pipe pile;

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