Device for shield plane sliding stepping in narrow space and construction method thereof

Abstract

The invention discloses a device for shield plane sliding stepping in a narrow space. The device comprises an arc-shaped guide table and a guide rail, and further comprises a force transmission mechanism connected with thrust cylinders on a shield main machine and an auxiliary force transmission mechanism positioned on the shield main machine and used for pulling the force transmission mechanism,wherein the force transmission mechanism comprises a plurality of force transmission blocks connected with one ends of the thrust cylinders, a cross beam connected with the force transmission blocks and counter-force supports positioned on one side of the cross beam; and the bottoms of the counter-force supports are connected with the arc-shaped guide table, and the number of the counter-force supports is equal to that of the thrust cylinders. The device is simple and practical, existing resources such as standard block segments are utilized, the steel structure arc-shaped guide table does notneed to be independently machined, and cost is saved; plane sliding is achieved in the small space, the section size of a sliding channel does not need to be increased, and the safety risk of a shallow buried section tunnel is reduced; and a supporting stress structure adopts the H-shaped steel cross beam to increase the supporting stress area, the cross beam and the counter-force supports transmit force in a balanced and symmetrical mode, operation is easy and convenient, and use is safe.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a plane sliding stepping square device for shield tunneling in a narrow space and a method for using the device. Background technique [0002] There are many methods of stepping and empty pushing for tunnel shield (heading machine) at home and abroad, including ground translation, translation in open excavation foundation pit (groove), translation in underground excavation of large-section tunnels, etc. In the past, oil cylinder jacking and small The machine tool cooperates with paving and other methods to move horizontally, so that there is enough operating space on both sides of the shield machine, and there are auxiliary tools to control the work space. As the shield machine, the shield machine weighs about 368t, the length of the machine is 9.4m, and the diameter is 6.83m. For the small space of underground tunnels, there is no operating space on both sides of the...

AI Technical Summary

Problems solved by technology

[0002] There are many methods of stepping and empty pushing for tunnel shield (heading machine) at home and abroad, including ground translation, translation in open excavation foundation pit (groove), translation in underground excavation of large-section tunnels, etc. In the past, oil cylinder jacking and small The machine tool cooperates with paving and other methods to move horizontally, so that there is enough operating space on both sides of the shield machine, and there are auxiliary tools to control the work space. As the shield machine, the shield machine weighs about 368t, the length of the machine is 9.4m, and the diameter is 6.83m. For the small space of underground tunnels, there is no operating space on both sides of the shield machine, and it is very difficult to move completely by manpower. Since the areas where subway tunnels are constructed are generally in relatively prosperous areas of the city, the surrounding environment is relatively complicated. The construction site is limited, and there is no condition for setting up the starting (lifting out) of the shield. During the construction of the shield, it may pass through buildings and structures at close range, or existing dangerous sources such as railways and high-speed rails, or pass through uneven hardness and softness. The strata brought certain difficulties and potential safety hazards to the construction, which caused the shield tunneling to fail to pass through on schedule. Therefore, the tunnel can only be constructed by the mining method first, and the shield tunnel will pass through this section by means of empty push in the later stage. The existing shield tunneling The method of promoting the use of the built underground station and underground tunnel is as follows. 1. The shield passes through the conventional underground station. Since the station provides good conditions for passing the station, the ground is flat and the space is large, it is adopted in the passing Steel rods are laid on the ground towards the station, and the top of the steel rods is covered with steel plates. The shield machine and base are placed on the steel plates and pushed forward by jacks; 2. The shield passes through the buried tunnel. Backfill the clay inside, and the shield machine will replace the segments to assemble and excavate through; it is only suitable for flat and large areas, or regardless of the cost, after the second lining of the underground excavation tunnel is completed, the tunnel will be backfilled again, and the shield tunnel will pass through conventional excavation, the cost is very high

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