Construction method and construction device for box culvert jacking

Abstract

The invention relates to a box culvert jacking construction method and a construction device, comprising an angle-adjustable bow slope mounted at the front end of a box culvert, an adjustable pulley arranged between the top of the box culvert and a head-up beam of an original line, a jack of the angle-adjustable bow slope, a steel bow slope and a triangular structure formed at the front end of the box culvert, the bottom face of the installed steel bow slope inclines upwards, an inclination angle is formed between the bottom face and the horizontal plane, and the hydraulic synchronous control system controls the jacks to eject or retract to change the inclination angle of the steel bow slope. The adjustable tackle comprises a vertical jack and a tackle body fixed above the vertical jack, a pulley of the tackle body makes contact with the transverse lifting beam, and the hydraulic synchronous control system changes the height of the adjustable tackle body by controlling the vertical jack to act. The device not only can automatically adjust the gradient of the bow slope to prevent the phenomenon of head pricking or head raising during box culvert jacking, but also can protect the top of the box culvert from damaging an original line, and has double functions.

Description

technical field [0001] The invention relates to the technical field of box culvert jacking construction, in particular to a construction method and construction device for box culvert jacking. Background technique [0002] In the process of municipal construction, when the new road must pass under the original railway and road subgrade, after taking necessary reinforcement measures for the original line, the box culvert jacking construction technology can be used to construct the new line. [0003] The box culvert is a three-dimensional box-shaped structure made of reinforced concrete with a rectangular cross-section, and the internal culvert provides a space for excavation and construction ahead. The box culvert jacking construction method is a construction method in which the prefabricated box culvert is jacked in and passed through by using power equipment to lift the original line. The box culvert jacking method is widely used because it can reduce the interference to t...

AI Technical Summary

Problems solved by technology

In the above-mentioned angle adjustment process, manpower or other facilities are needed to assist and rotate the steel truss and steel floor, and at the same time, the bolts fixing the hinge must be screwed, and the two operations of loosening and tightening are required. Auxiliary support, time-consuming and labor-intensive, difficult to operate

Secondly, such an adjustment method is also difficult to accurately locate the positions of the steel truss and the steel floor, and it is difficult to ensure the accuracy of the adjusted angle

In addition, the angle-adjustable "bow slope" is installed under the bottom of the box culvert, occupying a certain space, and it is bound to reduce the thickness of the front end of the bottom of the box culvert, which is not good for the box culvert to withstand a large jacking force. After the top of the culvert is put in place, the adjustable angle device needs to be removed and the floor should be repaired, which increases the workload of the construction

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