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A Foot-Locking Technology for Large Deformation Tunnel Steel Frame in Soft Rock

A large deformation and steel frame technology, applied in tunnels, tunnel linings, shaft equipment, etc., can solve the problems of fragility, steel frames and anchor pipes that cannot be directly connected to lock feet, so as to avoid distortion, deformation and failure of lock feet , the effect of high economic benefit

Active Publication Date: 2019-03-26
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the locking foot anchor tube has developed into an indispensable steel frame locking foot measure and is widely used, but there are still the following problems in the process of steel frame locking foot: the steel frame and the locking foot anchor tube cannot However, no matter what kind of welding process is used, the welding part has always been the most vulnerable part in the overall structure of the steel frame and the lock-foot anchor pipe

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  • A Foot-Locking Technology for Large Deformation Tunnel Steel Frame in Soft Rock

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Embodiment Construction

[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] The embodiment of the present invention provides a foot-locking process for the steel frame of a large deformation tunnel in soft rock, which includes the following steps:

[0015] (1) Selection of steel frame: Compared with section steel, circular steel tube concrete not only has superior mechanical properties, but also can avoid distortion and deformation of section steel frame due to insufficient strength and rigidity, and has higher economic benefits. More importantly, the circular CFST steel frame 1 (see figure 1 ) can be processed and manufactured to achieve a reliable connection with...

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Abstract

The invention relates to the technical field of tunnel support, in particular to a foot-locking process for a large-deformation tunnel steel frame in soft rock. In order to strengthen the reliability of the connection between the anchor pipe of the locking foot and the steel frame, and avoid the failure of the locking foot of the steel frame. The technical solution adopted by the present invention includes the following steps: step 1): steel frame selection: select the circular steel pipe concrete steel frame as the steel frame selection for soft rock large deformation tunnel; step 2): processing and production: according to the lock foot anchor pipe Design the drilling angle, design outer diameter and installation position corresponding to the circular steel tube concrete steel frame, drill reserved holes in the corresponding positions of the circular steel tube concrete steel frame, require the size and position of the reserved holes to be accurate, and lock them on the processing site. Trial installation of the foot anchor pipe to ensure that it can be installed successfully; Step 3): At the tunnel construction site, after the circular steel pipe concrete steel frame is erected or extended, and falls to the bottom, the steel frame locking feet shall be implemented in time.

Description

1. Technical field: [0001] The invention relates to the technical field of tunnel support, in particular to a foot-locking process for a large-deformation tunnel steel frame in soft rock. 2. Background technology: [0002] Steel frames can play an important role in maintaining the initial stability of tunnels in weak and broken ground after excavation. Whether the shaped steel frame can carry the load effectively depends to a large extent on whether its arch feet are stable. In order to ensure the stability of the foundation of the steel frame arch foot and the stability of the steel frame during the process of lengthening and landing, certain steel frame locking measures must be taken. At present, the locking foot anchor tube has developed into an indispensable steel frame locking foot measure and is widely used, but there are still the following problems in the process of steel frame locking foot: the steel frame and the locking foot anchor tube cannot However, no matter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/18E21D20/02
CPCE21D11/18E21D20/02
Inventor 陈建勋陈丽俊黄沛刘钦罗彦斌
Owner CHANGAN UNIV
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