Steel-concrete composite tunnel lining supporting structure and manufacturing and construction method thereof

Abstract

The invention discloses a steel-concrete composite tunnel lining supporting structure and a manufacturing and construction method thereof. The supporting structure is formed by splicing unit plate pieces with radian in the circumferential direction and axial direction of a tunnel wall. Each unit plate piece is provided with a pair of arc edges and a pair of straight edges. The inner wall of each unit plate piece is provided with protruding ribs at intervals in the straight edge direction. The radian of the protruding ribs is consistent with that of the arc edges, and cavity pillars are formed between the protruding ribs and the unit plate pieces. The surfaces of the protruding ribs are provided with concrete pouring holes, and unit plate pieces corresponding to the protruding ribs are provided with concrete overflowing holes. Meanwhile, the arc edges are inwards bent to form end face flanges, and the straight edges are provided with side edge flanges. The steel-concrete composite tunnel lining supporting structure has the advantages that the supporting structure can bear pressure load of the upper portion of a tunnel and the surrounding rock immediately, and the newly dug tunnel can be supported rapidly and timely and is prevented from collapsing; the supporting structure can be used for the primary lining as well as integrating the primary lining and the secondary lining and an also be used for repairing, reinforcing and the like of crippled tunnels.

Description

technical field [0001] The invention relates to a tunnel lining support structure, in particular to a steel-concrete composite structure for the inner lining of highway, railway, water transfer or air defense engineering tunnels and its manufacturing and construction methods. Background technique [0002] Tunnel lining is a permanent support structure built with steel arch frames and steel-concrete materials along the upper circumferential arch wall of the tunnel body to prevent the surrounding rock in the tunnel from deformation or collapse. The existing tunnel lining is generally provided with a primary support layer and a secondary lining layer. The primary support layer structure is composed of I-beams, arch frames, steel mesh, anchor rods and shotcrete, which are used to withstand the pressure generated by the plastic deformation of the structure above the cavern after tunnel excavation and prevent the surrounding rock from deforming or collapsing. After setting up the...

AI Technical Summary

Problems solved by technology

The above-mentioned structure and construction method have the following problems: ① Generally speaking, the primary support layer (i.e. the primary lining layer) of the tunnel bears most of the load on the upper part of the cave, but the bearing capacity of the primary support layer depends not only on the inner steel arch The frame also depends on the cooperation and support of the concrete, and the concrete will not immediately play a load-bearing role when it is poured. It needs solidification and hardening time. During this period of time, the support strength cannot be strictly guaranteed, especially in the crust. Complicated areas, and then tunnel engineering collapse accidents will often occur

②. After solidification, the concrete is a purely rigid material, not easy to deform, not earthquake-resistant, easy to crack, easy to seep water after cracking, and difficult to repair. This is a common problem after the tunnel is in operation.

④. Concrete engineering needs solidification and hardening time, which affects the progress of the project

⑤. A special large-scale initial construction trolley is required, and the investment in equipment is large

⑥. Rebar binding is a labor-intensive construction with a large amount of labor and slow speed

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