Profile steel or steel pipe cast-in-situ bored pile and construction method thereof

Abstract

The invention relates to a profile steel or steel pipe cast-in-situ bored pile and a construction method thereof. The cast-in-situ bored pile comprises a pile body, wherein the pile body is filled with retarded concrete; profile steel or a steel pipe is inserted into the axis position of the pile body in a penetrating manner; an upper extension part is arranged at the upper part, positioned on thepile body, of the profile steel or the steel pipe; a contraction part is arranged at the lower part, positioned on the pile body, of the profile steel or the steel pipe; and the contraction part hasa certain depth from the bottom of the concrete. The invention further provides the construction method of the profile steel or steel pipe cast-in-situ bored pile. The construction method is simple and convenient to operate, the construction efficiency is improved, and the quality of the pile body is improved.

Description

technical field [0001] The invention relates to a pile foundation engineering technology, in particular to a section steel or steel pipe bored pile and a construction method thereof. Background technique [0002] In the construction of building foundation pits, pile foundations are widely used as the most effective way to improve the bearing capacity of foundations. Pile foundations are generally divided into anchor static pressure piles and static pressure piles, prestressed centrifugal piles, reinforced concrete Prefabricated piles, steel piles, concrete piles and hand-dug piles. Among them, concrete pouring piles account for about 50% of the pile foundation construction, while the construction of traditional rotary drilling bored piles is generally quite mature in conventional strata and simple surrounding environments, and is widely used in foundation pit engineering. When the construction site is limited and the operation of the equipment is difficult, the quality of t...

AI Technical Summary

Problems solved by technology

Among them, concrete pouring piles account for about 50% of the pile foundation construction, while the construction of traditional rotary drilling bored piles is generally quite mature in conventional strata and simple surrounding environments, and is widely used in foundation pit engineering. When the construction site is limited and the operation of the equipment is difficult, the quality of the pile cannot be guaranteed by using conventional cast-in-place piles. In the face of small-diameter rotary-dug cast-in-place piles, the strength of the pile is low and the construction efficiency is low. Through the research on these aspects , the construction technology needs to be improved to enhance the company's construction technology strength, thereby further enhancing the market competitiveness

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