Rectangular pipe jacking automatic retaining device with pawls

Abstract

The invention relates to the technical field of underground mechanical method underground excavation construction, and particularly relates to a rectangular pipe jacking automatic retaining device with pawls. The rectangular pipe jacking automatic retaining device comprises retaining components and fixing components; the retaining components are horizontally and symmetrically arranged on the two sides of a pipe joint in the length direction of the pipe joint and used for fixing the pipe joint; each retaining component comprises a working support and the corresponding pawl; a reserved groove matched with the corresponding pawl is formed in the surface of the pipe joint; the fixing components are used for fixing the retaining components and providing counter force for preventing a pipe jacking machine and the pipe joint from retreating; and each fixing component comprises a fixing support, a fixing bolt, a spring and a spring fixing device. According to the retaining device, in the continuous jacking process of the pipe jacking machine and the pipe joint, under the cooperation action of the retaining components, the fixing components and other devices, the technology of retaining of the pipe jacking machine and the pipe joint is achieved; and compared with traditional retaining measures, the device is simple in structure, high in automation degree and shorter in consumed time, pipe joint retaining can be effectively achieved, ground surface settlement is effectively controlled, jacking construction can be more continuous, and the pipe jacking construction efficiency is effectively improved.

Description

technical field [0001] The invention relates to the technical field of underground mechanical underground excavation construction, in particular to an automatic backstopping device for rectangular pipe jacking with pawls, which is especially suitable for long-distance rectangular pipe jacking construction and construction. Background technique [0002] In recent years, the "green, safe, environmentally friendly, and efficient" rectangular pipe jacking technology can effectively control surface settlement because it avoids ground traffic diversion and underground pipeline demolition, construction has little disturbance to soil, and has little impact on urban ground environment. The high degree of mechanization has gradually been widely used in the development of urban underground space. During the jacking process, the jack provides jacking force to overcome the frontal water and soil pressure and side frictional resistance of the pipe jacking machine and pipe joints. When ins...

AI Technical Summary

Problems solved by technology

[0003] Check the existing pipe jacking construction materials and related patents. There are two main measures to prevent pipe jacking from retreating. One is to install pre-embedded steel connectors on the well wall of the launch shaft. When the jack needs to be retracted, welding or Rotate the relevant steel connectors to connect the pipe joint and the shaft wall into a whole. This method requires continuous disassembly and assembly, and the operation is complicated and time-consuming; the other is to install a special back-stop device, insert the back-stop pin into the pipe joint Reserving a hoisting hole and fixing it on the anti-retraction device can prevent the pipe joint from retreating. This device will occupy a certain working space and requires manual operation. The degree of automation is low and the work efficiency is low.

Images