Pile-foundation steel reinforcement cage anti-floating device and anti-floating method

Abstract

The invention provides a pile-foundation steel reinforcement cage anti-floating device and anti-floating method. The pile-foundation steel reinforcement cage anti-floating device comprises a leakage plate used for being connected with a steel reinforcement cage and a grouting hard tube, a slurry outlet of the grouting hard tube is pressed against the leakage plate, and a first leakage hole locatedbelow the slurry outlet is formed in the leakage plate. The steel reinforcement cage is subjected to buoyancy, the leakage plate is fixedly connected to the bottom of the steel reinforcement cage, the steel reinforcement cage and the leakage plate are placed into the pile foundation hole together, the grouting hard tube is pressed against the leakage plate, the leakage plate is subjected to downward pressure from the grouting hard tube, the leakage plate is fixedly connected to the bottom of the steel reinforcement cage so as to applying the downward pulling force to the steel reinforcement cage, the pulling force is used for counteracting the buoyancy, and therefore the steel reinforcement cage can be prevented from floating. The grouting hard tube can also be used for pouring concrete in subsequent engineering, the first leakage hole is formed below the slurry outlet, and therefore the leakage plate cannot influence the flow of the concrete, and normal construction of the construction can be guaranteed. According to the pile-foundation steel reinforcement cage anti-floating device and anti-floating method, the structure is simple, necessary facilities for pile-foundation construction are fully utilized, the cost is low, and the anti-floating effect is good.

Description

Technical field [0001] The invention relates to the field of pile foundation engineering construction, in particular to an anti-floating device and an anti-floating method of a pile foundation steel cage. Background technique [0002] During the construction of the pile foundation concrete pouring, the small steel cage, light weight, fast concrete pouring speed, and large buried depth of the conduit will cause the steel cage to float up. For conventional pile foundations, when the pile head is close to the ground or the steel protective tube, the pile head reinforcement can be welded to the steel protective tube or other counter-pressure measures to fix it to avoid the reinforcement cage from floating during the pouring process. However, for the uplift piles of subway stations and deep foundation pits for some houses, construction cannot be carried out after excavation to the bottom of the foundation pit, and construction must be carried out on the original ground. The empty pil...

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Problems solved by technology

[0004] In order to solve the floating problem of uplift piles in deep foundation pit engineering, the invention provides a pile foundation reinforcement cage anti-floating device and anti-floating method

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