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A construction technique of h-shaped water-stop curtain

A construction process and technology for water-stop curtains, which are applied in infrastructure engineering, construction, sheet pile walls, etc., can solve the problems that the curtain construction effect cannot achieve the expected purpose, affect the tunnel construction progress, and the tunnel operation environment is poor, etc., and achieve enhanced safety. The effect of stability, reducing construction disturbance and fast construction progress

Active Publication Date: 2014-10-08
THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP
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Problems solved by technology

The advanced curtain grouting and water-stopping method in the tunnel is relatively traditional. The existing problems are 1. The working environment in the tunnel is poor; 2. Due to the limited working surface of the tunnel construction, the tunnel must stop excavation during the curtain construction, which affects the progress of the tunnel construction; 3. The working surface is narrow, the construction safety risk is high, and the curtain construction effect generally cannot achieve the expected purpose

Method used

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  • A construction technique of h-shaped water-stop curtain
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  • A construction technique of h-shaped water-stop curtain

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Embodiment

[0034] Technical solutions

[0035] 1. Process method:

[0036] (1) Set up two cut-off walls 2.5m away from both sides of the outer side wall of the tunnel, and set up two rows of occlusal rotary grouting piles or mixing piles for water cut-off on the upper soil layer or sand layer (i. In the section where the rock is directly in contact with the rock, double rows of Φ500mm cement mixing piles are used for the soft soil layer, and the spacing is arranged at a distance of 400mm; The spacing is arranged according to 500mm), and a horizontal double-row occlusal rotary grouting pile or mixing pile is installed between the two cut-off walls at intervals of 100m to 150m along the longitudinal direction of the tunnel (the longitudinal spacing can be adjusted appropriately according to the conditions of the construction site and the geological and hydrological conditions) , to form a closed water cut-off curtain wall, which separates the influence area of ​​the tunnel from the surrou...

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Abstract

The invention relates to an H-shaped waterproof curtain construction process. The process comprises the following steps: installing two cutoff walls 2-3m away from the both sides of the outside of a tunnel side wall, installing two rows of staggered jet grouting piles or mixing piles on an upper soil layer or sand layer to stop water and installing a transverse two-row staggered jet grouting piles or mixing piles between the two cutoff walls every 100-150m along the tunnel to form a closed waterproof curtain wall. Therefore, the construction technical problem of the waterproof curtain and advance pre-reinforcement for underground engineerings such as shallow tunnels and subways can be solved. The process is characterized by simple construction process, wide working face and fast construction pace, the tunnel deformation and ground subsidence are effectively controlled and the safety and stability of the tunnel are increased. The process can be widely used for the construction of waterproof curtain and advance pre-reinforcement for underground engineerings such as shallow tunnels and subways.

Description

technical field [0001] The invention relates to a construction technology of an H-shaped water-stop curtain, in particular to a construction technology for water-stop curtains and advanced pre-reinforcement applied in shallow buried tunnels, subways and other underground projects. technical background [0002] In general tunnel construction and medium underground engineering construction, water stop measures generally implement advanced curtain grouting in the cave, that is, stop tunnel excavation, and grouting is performed on the excavation surface. The advanced curtain grouting and water-stopping method in the tunnel is relatively traditional, and the existing problems are 1. The working environment in the tunnel is poor; 2. Due to the limited working surface of the tunnel construction, the tunnel must stop excavation during the curtain construction, which affects the progress of the tunnel construction; 3. The working surface is narrow, the construction safety risk is hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/18E02D5/46E02D19/18
Inventor 王圣涛杨铭刘庆丰涂碧海付国才黄龙光鲍俊捷
Owner THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP
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