Shield shaft ell end large pipe shed structure based on double-layer lining and construction method

Abstract

The invention belongs to the technical field of tunnel engineering shield shafts, and particularly relates to a shield shaft end large pipe shed structure based on a double-layer lining and a construction method. According to the shed structure, a large pipe shed, a pipe shed guide pipe, a shield shaft bottom plate, a shield shaft lower end wall, a shield shaft middle plate, a shield shaft upper end wall composed of a shield shaft upper end outer side wall and a shield shaft upper end inner side wall, a shield tunnel, a shield shaft portal post-pouring ring beam and a shield shaft side wall are organically combined, and the shed structure is constructed through eight steps. According to the shield shaft upper end wall of the double-layer structure form, the shield shaft upper end outer side wall meets the requirements for large pipe shed driving positioning and precision control, the shield shaft upper end inner side wall meets the requirements for structure waterproof and overall stability, large pipe shed stratum reinforcement is effectively separated from a structure waterproof and stress system, so that requirements of surrounding environment protection on large pipe shed driving precision and disturbance control can be met, the structure safety and stability control target can be achieved, and the structure has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling engineering, and in particular relates to a double-layer lining-based large pipe shed structure at the end of a shield well and a construction method. Background technique [0002] For the current rail transit projects in major cities in China, with the encryption of the subway network and the continuous improvement of the surrounding environmental protection requirements, the requirements for construction technology are also getting higher and higher. As one of the most important and difficult points of the shield tunneling project, The construction of shield access tunnels has always been the focus of attention, especially in water-rich formations and relatively harsh surrounding environments. Under normal conditions, the large pipe shed is erected after the main structure of the shield tunnel is constructed. However, since the large pipe shed is located above the shield tunnel door and...

AI Technical Summary

Problems solved by technology

Under normal conditions, the large pipe shed is erected after the main structure of the shield tunnel is constructed. However, since the large pipe shed is located above the shield tunnel door and at the end wall of the shield tunnel, the construction of the pipe shed will cause the end wall of the shield tunnel to be damaged. Breaking through and smashing will not only fail to meet the waterproof requirements of the structure, but also leave a huge safety hazard and potential risk, and it will not be able to meet the environmental protection requirements around the shield well

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