Improvement structure of tee joint pipe assembly in tunnel crosswalk

Abstract

The invention relates to the field of intersecting reliability fixation of a connecting passageway of a main tunnel and a service tunnel in underground important infrastructure projects and projects such as various tunnels and city underground pipe galleries, in particular to a modified structure of a tunnel transverse way thee-joint joint pipe composite member. The tunnel transverse way thee-joint joint pipe composite member comprises a full-ball iron wall plate or a ball iron-concrete composite wall board (pipe piece), a thee-joint joint pipe, a positioning shearing-resistance sleeve, a plastic sealing ring, an oval service transverse way and the like. All the members are connected and installed to form the large tunnel transverse way thee-joint joint pipe composite member and the transverse way modified structure. The modified structure of the tunnel transverse way thee-joint joint pipe composite member is mainly suitable for reliability fixation of thee-joint joint pipes connected and communicated between various tunnels (particularly subsea tunnels) and service tunnels and thee-joint joint pipes on the joint portions of spare maintaining and emergency passageways of land high-speed railway tunnels, and the strength and tightness of connecting structures on the joints of the main tunnels and the service tunnels can be effectively improved.

Description

technical field [0001] The invention relates to the field of reliable fixation of connecting channels between main tunnels and service tunnels of important underground infrastructure projects, various tunnels and urban underground pipe corridors, and specifically relates to an improved structure of a tunnel crossway tee joint pipe assembly. Background technique [0002] At present, the structural layout of domestic land and submarine long-distance tunnels basically adopts the "two roads and one service" construction mode, which creates a very reasonable and effective engineering structure layout for tunnel decompression and ventilation or service maintenance and emergency rescue. In particular, my country's transportation construction has entered the development stage of expressways and high-speed railways, which have played an extremely important role in promoting economic development. The "13th Five-Year Plan" has included high-speed rail in the "eight vertical and eight h...

AI Technical Summary

Problems solved by technology

Due to the complex geological structure of the seabed and the area near the earthquake zone, in addition to encountering faults and other 6 kinds of unfavorable geological structures during tunnel construction, we can use a number of ductile iron composite wall plate segments that we have proposed to improve the bearing capacity and ensure safety. In addition to the reliability of the quality, at the same time, the joints between the two main tunnels and the intermediate service tunnel should be subject to tens of thousands of train wheel rolling vibrations every day, resulting in fatigue damage. Preventive and countermeasures should be carefully studied and solved, especially as a subsea high-speed rail tunnel. A set of 30-meter tunnel crossways connected to both sides of the service tunnel must be set up at a distance of 80 meters. The three-way joint pipe is the most severely damaged part due to continuous cyclic vibration and long-term fatigue damage. It is obvious that the brittle material concrete members used in the past are used as crossways. It is extremely unsafe and reliable to connect the two ends of the tee joint pipe

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