A kind of pile foundation protection pile and construction method

Abstract

A pile foundation protection pile, including a protection pile rod and a concrete base, and a reinforcement cage, the reinforcement cage adopts a rectangular structure with two ends open, the reinforcement cage is vertically buried in the pile protection pit around the concrete foundation, and the concrete foundation Set in the reinforcement cage; the reinforcement cage is made of the main reinforcement and the stirrup by binding wires, and there is also a "V"-shaped reinforcement between two adjacent main reinforcements, and one section of the "V"-shaped reinforcement is fixed on the reinforcement by wire binding On the cage, another section extends upwards slopingly to contact with the side wall of the pile protection pit. The construction method of the pile foundation protection pile includes: 1) prefabrication of the protection pile; 2) binding of the reinforcement cage; 3) excavation of the protection pile pit; 4) backfilling with fine sand; 5) installation of the reinforcement cage; 6) installation of the concrete base; 7) backfilling After the soil is compacted. Adopting the above structure and method can improve the stability of the retaining pile, avoid the situation of inclination and instability of the retaining pile, and can also ensure high stability at the site where mechanical and manual activities are frequent, and provide favorable conditions for pile foundation construction.

Description

technical field [0001] The invention relates to the field of pile foundation construction, in particular to a pile foundation protection pile and a construction method. Background technique [0002] In the construction of bridges, the pile foundation is used as the foundation structure, and its construction quality has always been the focus of engineering attention. In order to ensure that the reinforcement cage of the pile foundation is centered, four guard piles are often used to mark the center point of the drilling hole in engineering, and four mutually perpendicular steel bars are bound on the top of the reinforcement cage with wire ropes to form the cross center point of the reinforcement cage. Check the center point of the crossing line of the guard pile and the crossing center point of the reinforcement cage, so that the offset error of the reinforcement cage is within the required range. At the construction site, wooden poles, steel bars and other materials are oft...

AI Technical Summary

Problems solved by technology

However, this kind of protection pile still has certain defects. The bearing capacity of the bottom of the pile inserted into the soil layer is insufficient, and the friction force of the pile body is small, which leads to poor stability of the pile body at the part of the protection pile exposed to the soil layer. Workers are disturbed and unstable, which affects the centering accuracy of the steel cage

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