Underground comprehensive pipe gallery is a structure and ancillary facilities used for centralized laying of municipal pipelines such as power, communication, broadcasting and television, water supply, drainage, heat, gas, etc. underground in cities. In the underground comprehensive pipe gallery, municipal pipelines are placed in an orderly manner and managed scientifically. With the continuous updating and development of urban municipal pipe networks, the requirements for the construction efficiency and quality of comprehensive pipe galleries are becoming higher and higher. The application of prefabricated underground pipe gallery technology can greatly improve on-site construction efficiency and ensure construction quality. This article mainly introduces the application of prefabricated comprehensive pipe gallery technology..

This prefabricated pipe gallery is connected by a fully prefabricated L-shaped side wall (vertical component) and a laminated horizontal component. The upper part of the fully prefabricated L-shaped side wall is connected to the laminated top plate by cast-in-place joints, and its load-bearing steel bars extend from the prefabricated part and anchor to the horizontal component, forming a fixed connection; The lower part of the fully prefabricated L-shaped side wall and the cast-in-place bottom plate are anchored by extending pre embedded steel bars, and their stress mode and calculation are equivalent to the cast-in-place structure. This pipe gallery design originates from the invention patent for prefabricated underground pipe galleries independently developed and obtained by Hunan Dongfanghong Construction Group Co., Ltd. (invention patent number: ZL201510506586.3). It is assembled from prefabricated reinforced concrete L-shaped prefabricated walls and prefabricated reinforced concrete composite panels. The assembled integrated pipe gallery of this patent has the characteristics of light weight, strong bearing capacity, good integrity, simple prefabrication process, easy transportation and lifting, fast construction, and material saving. It is very suitable for the construction of underground passages and underground integrated pipe galleries, and has the following advantages:.

Reliable structure, easy installation, and shortened construction period. The lower part of the side wall and the middle I-shaped wall both have a 500mm long flange, which has self stability after lifting in place and can reduce corresponding support; At the same time, the assembly and connection nodes of the components are all equivalent to cast-in-place nodes, with a safe and reliable structure. The longitudinal connection of the components does not have dry splicing joints with fully prefabricated box culverts, and the waterproof performance is good; Due to the majority of the main structure being completed in the factory, the construction period is shortened by at least 40% compared to cast-in-place concrete box culverts..

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