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Construction Method of Reinforcing Sleeve Valve Pipe in Mountain Body

A construction method and sleeve valve tube technology are applied in the eccentric pressure section of the tunnel mountain body and in the construction field of underground excavation, which can solve the problems of distortion and deformation of local steel frames, arc-shaped cracks on the surface, and initial cracks in the tunnel, and achieve engineering The effect of fast progress, cost saving and less interference factors

Active Publication Date: 2022-07-05
CHINA RAILWAY SIXTH GRP CO LTD +1
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Problems solved by technology

[0004] The present invention aims at the technical problems that the initial support in the tunnel is cracked, the local steel frame is distorted and deformed, and arc-shaped cracks have been formed on the surface due to the broken rock mass, steep structural surface, steep terrain and engineering activities in the current tunnel construction. Reinforcement Construction Method of Mountain Sleeve Valve Pipe

Method used

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  • Construction Method of Reinforcing Sleeve Valve Pipe in Mountain Body
  • Construction Method of Reinforcing Sleeve Valve Pipe in Mountain Body
  • Construction Method of Reinforcing Sleeve Valve Pipe in Mountain Body

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Embodiment Construction

[0020] The construction method is described in detail below by taking a specific construction situation as an example.

[0021] 1. Hongya Tunnel of Menghua Railway

[0022] 1.1 Project Overview

[0023] Hongya Tunnel is located in Chongyang Town, Xixia County, Nanyang City, Henan Province. The entrance of Hongya Tunnel is connected to Dazhaigou Middle Bridge, and the exit is connected to Hongyagou Bridge. The tunnel is located about 400m to the right of the existing Ningxi Railway, and the national highway 312 is located on the left side of the line, and its direction is roughly the same as that of the line, but most of them are far from the line and the traffic is inconvenient. The tunnel adopts a single-hole double-track type, which is a double-track ballast track. The building length is 190.3m, the tunnel length is 184.8m, the import mileage is DK847+289.7, and the exit mileage is DK847+474.5. 43.5m, of which the IV-level surrounding rock is 30 meters long, and the V-leve...

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Abstract

The invention relates to the partial pressure section of the mountain body of a tunnel and the construction of underground excavation, in particular to a construction method for strengthening a sleeve valve pipe of a mountain body. It solves the technical problems of cracking of the initial branch in the tunnel, distortion and deformation of the local steel frame, and arc-shaped cracks on the ground surface due to the broken rock mass, the steep inclination of the structural plane, the steep terrain and the influence of engineering activities during the current tunnel construction. In the present invention, the rigid sleeve valve pipe grouting is applied in a certain range on both sides of the tunnel section where the cracks are generated. Through high-pressure grouting, the grout penetrates into the cracks of the rock formation, and through repeated compaction of the formation, the formation density and uniformity are increased, and combined with the rigid sleeve valve tube micro-pile effect, a rigid composite formation is formed, which effectively improves formation stability.

Description

technical field [0001] The invention relates to the partial pressure section of the mountain body of a tunnel and the underground engineering construction of underground excavation, in particular to a reinforcement construction method of a sleeve valve pipe of a mountain body. Background technique [0002] In the process of tunnel construction, it is inevitable to pass through the mountainous area. In order to strive for the best route operation plan, it is also necessary to choose to pass through the biased and weak surrounding rock, which not only needs to ensure the safety of the construction of the tunnel project, but also The impact of the tunnel project on the nearby mountains must also be properly addressed. [0003] In the original construction of a tunnel, the exit was used to enter the hole, and the construction was suspended when the construction reached a certain mileage. Due to the lithology of the surrounding rock of the tunnel is muscovite-quartz schist, with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10C04B28/00C04B111/70
CPCE21D11/10E21D11/105C04B28/00C04B2111/70C04B14/104Y02E10/20
Inventor 王忠华梁小平周彪张磊李永旺杨川
Owner CHINA RAILWAY SIXTH GRP CO LTD
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