Multipoint movable tunnel face temporary supporting system

Abstract

A multipoint movable tunnel face temporary supporting system comprises a base, a plurality of hydraulic output assemblies and a plurality of bearing plates. The hydraulic output assemblies are mountedon the base and each provided with the corresponding bearing plate; the base is of a movable structure; the hydraulic outlet assemblies comprise supporting hydraulic cylinders; and one ends of the supporting hydraulic cylinders are connected with the base, and the other ends of the supporting hydraulic cylinders are connected with the plate faces of the bearing plates. A tunnel face can be supported, supporting adjustment can be conducted according to the deformation situation of the tunnel face, efficient and rapid supporting is achieved, and the construction time is effectively saved.

Description

technical field [0001] The invention relates to the field of tunnel construction equipment, in particular to a multi-point movable tunnel face temporary support system. Background technique [0002] In recent years, with the rapid growth of my country's economy, a large number of transportation infrastructure constructions have been carried out, and it has become the country with the most tunnels built and under construction in the world. When using the mining method to construct tunnels with weak surrounding rocks, disasters such as falling blocks, falling rocks and even overall collapse often occur due to the lack of overall or local stability of the tunnel face. These disasters not only destroy construction equipment and delay the construction period, but also directly endanger the personal safety of construction workers, causing huge loss of life and property. In order to avoid this situation, for tunnels with large cross-sections and weak surrounding rocks, the sub-sec...

AI Technical Summary

Problems solved by technology

[0003] For tunnels whose face is difficult to self-stabilize during full-section construction or after face subdivision, in addition to the conventional advance support of the arch pipe shed, the advance reinforcement technology of the face is often used to protect the face. The stability of the face, such as the use of anchors on the face, grouting reinforcement on the face, rotary spraying on the face and sprayed concrete on the face, etc., can prevent the relaxation of the face and enhance the stability of the excavation face, but these The method not only consumes materials and labor, is cumbersome and time-consuming, and even delays the construction period, but also causes more sundries to appear on the working surface, which affects the construction progress and quality

In actual construction, face reinforcement methods often rely on engineering analogy, and reinforcement and support methods are designed and implemented according to empirical parameters, which are poorly targeted with the parameters of the surrounding rock of the actual tunnel and the stress state of the tunnel, and the adjustment is slow.

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