Prefabricated tunnel lining segment

Abstract

The invention discloses a prefabricated tunnel lining segment, belonging to the field of tunnel construction technology and aiming at simplifying the production and processing technique of prefabricated segments, optimizing the connection mode of segments and improving the prefabricated segment splicing and lining construction efficiency of a shield tunnel, especially round cross section, and the like. The concrete lining in the cross section of a round tunnel is divided into six prefabricated concrete segments, arcs are arranged on the cross sections of the six concrete prefabricated concrete segments, the six concrete prefabricated concrete segments include a top sealing block, two abutting blocks and three standard blocks, and two end surfaces of each block are provided with concave-convex steps which have symmetric or reverse structures; the top sealing block is shaped like a regular wedge which has a symmetrical structure, the two abutting blocks are both partially wedge-shaped and have reverse structures; the two standard block have reverse structures; after a circle of closed lining can be completed by splicing the six concrete prefabricated concrete segments, one ends, provided with bulges, of all segments in the circle are embedded in the cylindrical grooves of the spliced segments in the last circle so as to splice the segments. The prefabricated tunnel lining segment is mainly used for lining of the shield tunnel.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, in particular to the technical field of lining for circular cross-section tunnels constructed by shield tunneling or manual excavation. Background technique [0002] Tunnels with circular cross-sections are widely used because of their good load-carrying properties. Especially in industries such as urban subways, railways, highways, municipal engineering, oil and gas, and hydropower, the shield method is mostly used to build underground tunnels with circular cross-sections. The cross-section of the tunnel constructed by the shield method is mainly circular, and the lining of the tunnel is mainly assembled by prefabricated reinforced concrete segments. In order to facilitate the assembly of prefabricated segments, special bolts are required for connection and fastening between the circumferential and longitudinal segments in the tunnel. Usually the prefabricated concrete segments of ...

AI Technical Summary

Problems solved by technology

However, since the segments are connected and fastened by special bolts, manual operations are required for hole alignment, bolt insertion and fastening, etc. during assembly. Therefore, this link has always restricted the construction efficiency of shield tunneling and One of the main factors affecting project cost

Although the fastening bolts are made of steel with anti-corrosion measures such as galvanizing, with the extension of tunnel operation time, the bolt steel is prone to corrosion under long-term use conditions, so the durability and strength of fastening bolts will increase with the extension of tunnel service time. and lower, which in turn will affect the safety of the tunnel

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