A supporting receiving frame for an open tunnel boring machine shield body and its installation method

Abstract

The invention discloses a matched receiving rack for an open type tunneling machine shield and a mounting method. The matched receiving rack comprises a receiving rack body. A second arc face is formed on the upper end face of the receiving rack body. The receiving rack body and a large support shoe are connected in a matched manner, and a first arc face on the large support shoe is matched and inbutt joint with the second arc face. One side of the receiving rack body is connected with a supporting plate assembly, and the lower end of the supporting plate assembly is connected with a mountingcolumn. A connecting pipe is connected to the other side of the receiving rack body. In the matched receiving rack, the receiving rack is additionally arranged below TBM equipment, after the receiving rack and the shield form a whole, the contact area with a reinforced concrete bottom plate is increased, and it can be guaranteed that tunnel bottom plate concrete cannot be fractured in the propulsion process; and due to the fact that the contact face of the round shield and the stepping flat bottom reinforced concrete ground is extremely small, the TBM shield is prone to turning over in the idle pushing stepping process, accidents are prone to happening, the shield turnover problem in the stepping process cannot happen by means of the structural design of the receiving rack, and it is ensured that the idle pushing stepping process is smooth.

Description

technical field [0001] The invention relates to the technical field of tunnel boring machine equipment, in particular to a supporting receiving frame and installation method for an open tunnel boring machine shield body Background technique [0002] TBM construction technology has been widely used in various tunnel projects such as large-scale water conveyance tunnel projects, railway tunnel projects, and municipal tunnel projects in China. In addition to the complete excavation function of TBM (a complete set of tunnel construction technology of excavation, support, and slag discharge), in some specific projects, after completing the tunnel excavation task, the TBM penetrates into another section of the excavated tunnel and needs to be pushed empty. Stepping to a specific hoisting position (such as a shaft, an open area with hoisting conditions, etc.) can be disassembled and hoisted out to realize the reuse of TBM equipment. At present, the domestic air-push stepping techn...

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Problems solved by technology

[0003] However, this method has the problems of high cost and low stepping efficiency. At the same time, because the contact surface between the circular shield body and the stepping flat-bottomed reinforced concrete ground is extremely small, the pressure generated is relatively high, and the weight of the TBM shield body (about 400 tons) is in the air. Pushing the stepping process is easy to fracture the concrete of the tunnel floor, and it is also easy to crush the reinforced concrete floor

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