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Sleeve valve pipe reinforcing construction method for mountain

A construction method and technology of sleeve valve pipes, which are applied in tunnel mountain biased areas and underground excavation engineering construction fields, can solve problems such as arc cracks on the surface, local steel frame distortion, and initial support cracking in the cave, etc., to achieve saving The effect of cost, fast project progress and less interference factors

Active Publication Date: 2021-08-06
CHINA RAILWAY SIXTH GROUP +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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  • Sleeve valve pipe reinforcing construction method for mountain
  • Sleeve valve pipe reinforcing construction method for mountain
  • Sleeve valve pipe reinforcing construction method for mountain

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Embodiment Construction

[0020] The specific construction situation is taken as an example below to describe the construction method in detail.

[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 on the right side of the existing Ningxi Railway. 312 is located on the left side of the line, and its direction is roughly consistent with the direction of the line, but most of them are far away from the line, and the traffic is relatively 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 entrance mileage is DK847+289.7, and the exit mileage is DK847+474.5. 43.5m, including 30 meters of surrounding rock for grade IV, and 15...

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Abstract

The invention relates to tunnel mountain unsymmetrical pressure section and underground excavation underground engineering construction, in particular to a sleeve valve pipe reinforcing construction method for a mountain. The technical problems that in existing tunnel construction, due to influence of rock mass crushing, structural face steep inclination, steep terrain and engineering activities, primary support cracking in a tunnel is caused, a local steel frame is distorted and deformed, and arc-shaped cracks are generated on the earth surface are solved. Rigid sleeve valve pipe grouting is conducted within a certain range on two sides of a tunnel section with cracks. Through high-pressure grouting, grout permeates into rock stratum cracks, the compactness and uniformity of a stratum are improved by repeatedly compacting the stratum, and the rigid sleeve valve pipe micro pile effect is combined, so that a rigid composite stratum is formed, and the stability of the stratum is effectively improved.

Description

technical field [0001] The invention relates to tunnel mountain bias section and underground excavation engineering construction, in particular to a mountain sleeve valve tube reinforcement construction method. Background technique [0002] In the process of tunnel construction, it is inevitable to pass through mountainous areas. In order to strive for the best line operation plan, it is also necessary to choose to pass through biased and weak surrounding rocks. This not only needs to ensure the safety of the tunnel project itself, but also It is also necessary to properly address the impact of the tunnel project on nearby mountains. [0003] The original construction of a tunnel used the exit and entry, and the construction was suspended when the construction reached a certain mileage. Because the lithology of the surrounding rock of the tunnel is muscovite quartz schist, partially intercalated mica schist, schistosis and joints are developed, the rock mass is broken, the ...

Claims

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Application Information

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Patent Type & Authority Applications(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 GROUP
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