Underground continuous wall reinforcement cage hoisting method in height-limited area

Abstract

The invention provides an underground continuous wall reinforcement cage hoisting method in a height-limited area, and belongs to the field of underground continuous wall construction. The undergroundcontinuous wall reinforcement cage hoisting method comprises a construction preparing process, a hoisting process, a synchronous proceeding and reinforcement cage dropping process and a reinforcementcage orifice welding process, wherein the hoisting process comprises the following steps: S31 of synchronously hoisting three hoists until the reinforcement cage is horizontally hoisted by 1.5-2.0 m,continuously and synchronously hoisting two primary hoists, and dropping a hanger by a secondary hoist; and S32 of completely straightening the reinforcement cage and relieving the hanger of the secondary hoist after weight of the reinforcement cage is borne by the two primary hoists. The underground continuous wall reinforcement cage hoisting method solves the problems that an existing hoistingway has many hoisting times, has many welding and connecting times, consumes time and labor, increases cost, is poor in reinforcement integrity, avoids phenomena such as slot wall hole collapse, cagebody mud entrainment and excessive sediments if time of mounting the reinforcement cage is too long, and slot wall exposure time is too long, and solves the problem that control on underground continuous wall construction quality is bad.

Description

technical field [0001] The invention relates to the construction field of an underground diaphragm wall, in particular to a method for hoisting a reinforcement cage of an underground diaphragm wall in a height-limited area. Background technique [0002] Such as figure 1 As shown, in the construction process of the underground diaphragm wall, under normal circumstances, the reinforcement cage of the wall is integrally manufactured and hoisted into the groove at one time, and the reinforcement cage is hoisted using hooks, shoulder poles, wire ropes and other spreaders 3, usually with a height of about 3.5m . [0003] However, when the construction site is affected by the high-voltage line 1 and is in the height-limited area 2, and the hoisting height on the site is insufficient, the reinforcement cage 4 is made in sections, and the segmented reinforcement cage 4 is connected by welding during hoisting to ensure continuous The integrity of the wall reinforcement. [0004] Th...

AI Technical Summary

Problems solved by technology

[0005] 1. Many times of hoisting, welding and lengthening, time-consuming and labor-intensive, increased cost and poor integrity of the reinforcement cage 4;

[0006] 2. If the reinforcement cage 4 is placed for a long time, the exposure time of the groove wall will increase if it is too long, and it is easy to cause the collapse of the groove wall, mud in the cage body, excessive sediment, etc., which is unfavorable for the control of the construction quality of the underground diaphragm wall.

[0007] For example, in the construction of an underground diaphragm wall in a project in Shenzhen, the high-voltage wires on the wall are located at a height of 12m above the ground. According to the requirements of the specification, a safety distance of 5m must be ensured for hoisting operations below the high-voltage wires. The traditional segmented hoisting tool 3 occupies a space of 3.5m. Then the section length that can be manufactured by the theoretical reinforcement cage 4 is only 3.5m

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