Horizontal frozen pipe drawing device

Abstract

The invention discloses a horizontal frozen pipe drawing device. The device comprises a steel wire rope, a winch, a pipe drawing device support, a first fixed pulley and a second fixed pulley; the first end of the pipe drawing device support abuts against the vertical face of an underground diaphragm wall, and the first fixed pulley is arranged at the second end of the pipe drawing device support; the second fixed pulley is arranged on a to-be-drawn horizontal frozen pipe freezer flange plate; one end of the steel wire rope is fixedly connected with the to-be-drawn horizontal frozen pipe freezer flange plate, and the other end of the steel wire rope sequentially bypasses the first fixed pulley and the second fixed pulley and is wound on a winding drum of the winch; and when the steel wire rope tensions and draws the to-be-drawn horizontal frozen pipe freezer flange plate, the pipe drawing device support is pressed on the vertical face of the underground diaphragm wall. The stress point of the horizontal frozen pipe drawing device is completely separated from a scaffold and a working platform, so that deformation and collapse caused by stress of a scaffold construction platform are avoided.

Description

technical field [0001] The invention relates to the technical field of freezing tube extubation, in particular to a horizontal freezing tube extubation device. Background technique [0002] Municipal subway projects are generally counted by tenders. According to the bidding law and common practices, generally, a unit won no more than two adjacent tenders. There are construction end well structures between different tenders. Shield hoisting, lowering, receiving , and origination are all carried out through the end well. In areas with water-bearing sand layers, freezing is generally required due to geological reasons, including two methods of freezing vertical holes on the ground and constructing horizontal holes at the end well. Horizontal freezing has the advantage of avoiding the thawing of the side wall and can be used in shield construction. The construction and removal of frozen pipes shall be carried out within the scope. In recent years, the extubation-free technolog...

AI Technical Summary

Problems solved by technology

[0004] (1) High risk: whether it is chain hoist, electric hoist or fixed pulley, it is directly fixed on the scaffold, and the scaffold is mainly a platform built for high-altitude workers to facilitate high-altitude operations. If the friction resistance in the frozen wall is too high Large, the wire rope pulling force will pull the scaffold to the direction of the ground and the wall or even bend it; and if the hoist is used with the fixed pulley for construction, once it is "over-rolled", the entire scaffold will be easily pulled down

Therefore, this way of extubation makes the construction personnel on the scaffold platform have higher personal risks

[0005] 2) In terms of technology: the position distribution of the frozen tubes to be removed is generally circular, while the scaffolding space is square. In the actual tube removal, it cannot be guaranteed that each frozen tube is aligned with the fixed pulley or hoist attached to the scaffold along the axis. As a result, considerable eccentricity occurs during extubation

At this time, in addition to resisting the friction resistance generated by the frozen wall and the ground connection wall, the pulling force also needs to overcome the bending moment caused by eccentricity, which will increase the difficulty of pulling the tube

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