A starting base of a similar rectangular shield and its installation method

Abstract

The invention discloses a starting base of a rectangular shield and an installation method of the starting base. The base comprises a steel structure bracket, a guide rail mechanism and limit mechanisms; the steel structure bracket is fixedly connected to a shield starting work well baseplate; the guide rail mechanism is arranged on the steel structure bracket and comprises two main rails erected on the steel structure bracket, a first auxiliary rail arranged between the two main rails and second auxiliary rails arranged on the outer sides of the two main rails, axes of the main rails, the first auxiliary rail and the second auxiliary rails all intersect with the center point of the starting shield, rigid support structures used for supporting the rectangular shield are arranged on the main rails along the shield axis direction, and elastic support structures used for shoring the rectangular shield are arranged on the first auxiliary rail and the second auxiliary rails along the shield axis direction; the limit mechanisms used for limiting the rectangular shield are supported on the steel structure bracket and located on the outer sides of the second auxiliary rails. The rigid support structures play a role in supporting the rectangular shield, the elastic support structures play a role in preventing a shield shell from deformation, and the limit mechanisms fix the position of the rectangular shield to prevent the rectangular shield from deflecting in position.

Description

technical field [0001] The invention relates to the field of tunnel shield technology, in particular to a starting base of a similar rectangular shield and an installation method thereof. Background technique [0002] Due to the advantages of less impact on the ground structure, low labor intensity, high degree of mechanization, accurate tunnel shape and high quality, the shield method has become an important construction technology in the construction of urban rail transit in my country. The shield method tunnel uses the working well to enable the shield tunneling machine to start construction along the predetermined tunnel axis and elevation position, and the reaction force required for the start of the shield machine tunneling is provided by the shield back system. The starting back system of the shield generally includes two parts: the shield base and the starting reaction frame of the shield. [0003] The main function of the shield starting base is to place the shield...

AI Technical Summary

Problems solved by technology

[0007] 3) The rigidity and stability of the shield shell of the quasi-rectangular shield machine is not as good as that of the circular shield machine. If only 2 steel rails are used, it will easily lead to the deformation of the shield shell at the initial stage of the shield machine.

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