Large pipe shed guide wall structure of underground excavation tunnel and construction method of large pipe shed guide wall structure

Abstract

The invention provides a large pipe shed guide wall structure of an underground excavation tunnel and a construction method of the large pipe shed guide wall structure. The large pipe shed guide wall structure comprises a guide wall located outside an underground excavation tunnel portal, large pipe shed pre-buried sleeves arranged in the circumferential direction of the arch portion of the inner edge of the guide wall at intervals and longitudinally penetrate through the guide wall, and a large pipe shed constructed from the large pipe shed pre-buried sleeves to bed rock at the top of an underground excavation tunnel body, wherein the guide wall and a open-cut structure fender post are arranged in a nested mode, the width of the guide wall is equal to the diameter of the open-cut structure fender post, main ribs of the open-cut structure fender post are anchored and integrally cast to form a whole, the guide wall is supported on the open-cut structure fender post, and the open-cut structure fender post is fixedly fixed in a rock-soil layer below in an embedded mode. According to the large pipe shed guide wall structure of the underground excavation tunnel and the construction method, the large pipe shed guide wall structure is good in integrity, clear in force transmission path, space-saving, safe and reliable, the influence on the main body structure of a working well can be reduced by constructing the guide wall and the large pipe shed in advance, the large pipe shed guide wall structure of the underground excavation tunnel and the construction method can be used for arranging large pipe shed guide walls of subways, railways and municipal subsurface tunnels, and is high in practicability and good in generalizability.

Description

technical field [0001] The invention belongs to the field of municipal engineering and road traffic, and in particular relates to a large pipe shed guide wall structure and construction method in the field of laying large pipe sheds in underground mining method tunnels, and relates to the large construction of open excavation working wells in all underground mining method tunnels. Tube shed field. Background technique [0002] With the continuous development of my country's urbanization process, the development of underground space has shown a rapid development momentum, and there are more and more underground projects such as underground sidewalks, cross-river tunnels, and urban rail transit. Tunnel construction is limited by factors such as ground traffic, pipeline distribution, surrounding construction environment, engineering geology and hydrogeology, and use functions. The mining method is often used for construction. To ensure the safety of the tunnel construction sect...

AI Technical Summary

Problems solved by technology

[0005] (1) The guide wall is located inside the enclosure structure, it is difficult to connect with the enclosure structure, the overall stability is poor, and a vertical force transmission structure needs to be set separately;

[0006] (2) The guide wall is located between the enclosure structure and the main structure of the open excavation, and fertilizer tanks need to be installed. The waterproof construction of the open cut structure and the backfilling of the fertilizer tank are difficult, and the construction quality is difficult to guarantee;

[0007] (3) During the construction of the large pipe shed, the surrounding protection piles need to be penetrated, which requires high drilling machinery, long drilling time, and difficult to guarantee the horizontal angle

[0009] (1) The pre-buried casing is set in the side wall of the internal structure, which increases the difficulty of waterproofing the side wall, and the waterproof effect is difficult to guarantee;

[0010] (2) The pre-embedded casing is continuously arranged within a certain range in the side wall of the internal structure, which weakens the rigidity of the side wall to a certain extent;

[0011] (3) During on-site construction, the large pipe shed on the arch top often conflicts with the middle plate of the main structure. When the large pipe shed is constructed in the later stage, it is necessary to reserve a large pipe shed operation hole in the middle plate. The hole area is large and needs to be sealed later , has an impact on the integrity of the main structure;

[0012] (4) During the construction of the large pipe shed, the surrounding protection piles need to be penetrated, which requires high drilling machinery, long drilling time, and difficult to guarantee the horizontal angle

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