Construction method of external-wrapping tunnel portal ring beam in water-rich stratum shield interval

A water-rich stratum and construction method technology, applied in underground chambers, earthwork drilling, wellbore lining, etc., can solve the problems of small construction space, difficult pouring of concrete, inconvenient construction, etc., to achieve safe and reliable structure, reduce Construction risk, quality guaranteed effect

Inactive Publication Date: 2020-04-07
CHINA RAILWAY GUANGZHOU ENG GRP CO LTD +1
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  • Abstract
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Problems solved by technology

[0003] The construction space is small and the construction is inconvenient. When the construction clearance of the lined ring beam does not meet the design requirements, it is necessary to break the sealing ring segment of the water and sand plugging in the tunnel to meet the construction clearance, which is prone to occur when the segment is removed. There is a certain safety risk in the water gushing accident; when pouring the ring beam, it is difficult to pour the concrete full, and the vibration is inconvenient and cannot fully guarantee the compactness of the ring beam

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  • Construction method of external-wrapping tunnel portal ring beam in water-rich stratum shield interval
  • Construction method of external-wrapping tunnel portal ring beam in water-rich stratum shield interval

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[0026] This part will describe the specific embodiment of the present invention in detail, and the preferred embodiment of the present invention is shown in the accompanying drawings. Each technical feature and overall technical solution of the invention, but it should not be understood as a limitation on the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0028] I...

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Abstract

The invention discloses a construction method of an external-wrapping tunnel portal ring beam in a water-rich stratum shield interval. By improving the construction method of a traditional tunnel portal ring beam, the construction quality of the tunnel portal ring beam is safer and more reliable than that of a traditional internal-lining ring beam by adopting the method of the external-wrapping ring beam without being affected by the length of an original tunnel outing cave ring segment extending out of a tunnel portal end wall, an original segment in a tunnel does not need to be damaged, water flush accidents due to detaching of the segment are avoided, the construction risk is reduced, the construction space is large, the concrete can be vibrated and compacted, the method is easy to conduct, the structure is more safe and reliable, and the quality is more guaranteed; and the construction method is used in the technical field of underground engineering construction.

Description

technical field [0001] The invention relates to the technical field of underground engineering construction, in particular to a construction method for an outsourced portal ring beam in a shield section of a water-rich stratum. Background technique [0002] The ring beam at the end of the existing subway tunnel often adopts the lining method, and the ring joint of the back station of the tunnel segment and the structural form of the station end wall is used to form a waterproof and compression-resistant lining ring beam. Through the optimized design, when there is not enough clearance between the segment in the tunnel section and the end wall of the station, it is not necessary to cut the segment in the tunnel to meet the space for the ring beam in the tunnel, but to cut the segment at the end of the tunnel. An encased ring beam on the outer seat of the segment allows the segments and end walls to form an external enclosure. [0003] The construction space is small and the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D11/10E21D11/08E21D11/38
CPCE21D9/14E21D11/08E21D11/10E21D11/105E21D11/38
Inventor 龚武雄郑开云谷洪宇
Owner CHINA RAILWAY GUANGZHOU ENG GRP CO LTD
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