Method for hoisting low-clearance super-long reinforcement cage into hole section by section under high-voltage line

Abstract

The invention discloses a method for hoisting a low-clearance super-long reinforcement cage into a hole section by section under a high-voltage line. The method comprises the following steps of (a) cleaning a site; (b) assembling a reinforcement cage; (c) butting two sections of reinforcement cages; (d) positioning; and (e) hoisting section by section. The method for hoisting the reinforcement cage into the hole in a segmented mode is adopted, pile holes of different depths can be flexibly adapted, the enough reinforcement cage burying depth is guaranteed, the problem that construction is not allowed within the vertical distance range of 6 m of the high-voltage line is solved, the construction operation of hoisting the long reinforcement cage into the hole at the limited height is achieved, the hoisting weight of the single-section reinforcement cage is more effectively controlled, the accident of hoisting instability of the whole-section reinforcement cage is avoided, and the safety of constructors and equipment is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a method for segmentally hoisting and loading a low-clearance super-long reinforcement cage into a hole under a high-voltage line. Background technique [0002] At present, the excavation of foundation pits of subway stations mostly adopts two types of enclosure structures: ground connection wall and bored piles. Often located in urban areas, there are many buildings and bridges, and there are high-voltage lines above. Sectional steel cages still have problems such as heavy weight, difficulty in lifting, and accidents of hoisting instability. Not only is it difficult to locate the position of the steel cage in the pile foundation hole, but it is also easy to cause the steel cage to collide with the hole wall and cause damage to the steel cage. , and the alignment installation takes a long time, and the construction efficiency is low; the steel bar conne...

AI Technical Summary

Problems solved by technology

[0002] At present, the excavation of foundation pits of subway stations mostly adopts two types of enclosure structures: ground connection wall and bored piles. Often located in urban areas, there are many buildings and bridges, and there are high-voltage lines above. The line height does not exceed 15m, and construction is not allowed within 6m of the vertical distance of high-voltage lines. Sectional steel cages still have problems such as heavy weight, difficult lifting, and accidents of hoisting instability. Not only is it difficult to locate the position of the steel cage in the pile foundation hole, but it is also easy to cause the steel cage to collide with the hole wall and cause damage to the steel cage. , and the alignment installation takes a long time, and the construction efficiency is low; the steel bar connected by the hook is not rigid enough, and it is easy to deform, and the hoisting process requires high requirements, otherwise it will aggravate the deformation of the steel cage due to the force during hoisting

Images