Main jacking device for pipe jacking construction through pipe-roofing underground excavation method

Abstract

The invention relates to a main jacking device for pipe jacking construction through a pipe-roofing underground excavation method. The main jacking device comprises a base, a fixed back part connectedwith the base, a propelling assembly movably and slidably arranged on the base, power mechanisms fixedly arranged on the propelling assembly, a portal frame fixedly arranged on the base and located in front of the propelling assembly, and stopping mechanisms mounted on the portal frame and capable of conducting extending-retracting adjustment. The power mechanisms are connected with the fixed back part, and the propelling assembly is pushed through the power mechanisms to move forwards along the base; and sawtoothed faces matched with pipe sections are arranged on the stopping mechanisms, andthe sawtoothed faces are closely attached to the outer side faces of the pipe sections through extending-retracting adjustment of the stopping mechanisms. The phenomenon that the jacked pipe sectionsrecede when the pipe sections are additionally arranged during pipe jacking construction through the pipe-roofing underground excavation method can be well avoided, downward-inclining of the whole pipe sections due to sinking of a machine head in the propelling process can slow down, and stable propelling of the pipe sections can be ensured, and the construction efficiency is high.

Description

technical field [0001] The invention relates to the field of pipe jacking construction by the pipe curtain underground excavation method, in particular to a main jacking device for pipe jacking construction by the pipe curtain underground excavation method. Background technique [0002] With the development of urban construction, the population density has increased significantly, and there are more and more means of transportation. Urban traffic congestion restricts urban development. The development and utilization of underground space has become the focus of research by all parties. Whether the construction method is appropriate will directly affect the construction efficiency and cost. . The pipe curtain construction method is a kind of non-excavation technology. As a construction technology of using small-diameter pipe jacking machines to construct large-section underground spaces, it has been developed for more than 20 years abroad. It is used in Japan, the United Stat...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a main jacking device for pipe jacking construction by the pipe curtain method, and solve the problem that the head quality is large and the overall pipe joints tend to fall in the existing pipe curtain method construction. The phenomenon that the pipe joint is prone to retreat makes it difficult to control the precision of pipe jacking, and the problem of low jacking efficiency due to long pushing time

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