Partition strengthening method for tunnel passing weak stratum
A technology for weak strata and tunnels, which is applied in the field of zonal reinforcement of tunnels passing through weak strata, can solve the problems of blindness, high cost, lack of pertinence and purpose of reinforcement methods, and achieves reduction of tunnel structure settlement, reduction of internal forces, The effect of improving physical and mechanical properties
Active Publication Date: 2015-04-08
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology
For the reinforcement in the tunnel, the method of grouting in the tunnel is generally adopted. Specifically, it is divided into two types: full section or only reinforcement of the base. The role and necessity of reinforcement have not been clarified from the perspective of optimizing the force and deformation of the tunnel structure. The method lacks obvious pertinence and purpose, the construction process is blind, and the cost is high
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[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0016] As shown in the figure, after the construction of the tunnel structure is completed, the peripheral space of the tunnel structure is divided into two axially symmetrical lateral resistance areas and the tunnel bottom resistance area along the axial direction of the tunnel structure. Reinforcement measures are taken to form lateral reinforcement areas respectively. and tunnel bottom reinforcement area, including the following steps:
[0017] (1) After the construction of the tunnel structure is completed, first use the grouting hole on the side waist of the tunnel structure to insert the grouting pipe laterally into the tunnel to reinforce the soil in the lateral resistance area of the tunnel structure to form a lateral reinforcement area;
[0018] (2) Then use the grouting hole at the bottom of the tunnel structure to insert ...
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The invention discloses a partition strengthening method for a tunnel passing weak stratum, which divides the peripheral space of a tunnel structure into a lateral resistance region and a tunnel bottom resistance region which are symmetric with each other along the axial direction of the tunnel structure to implement strengthening measures so as to form a lateral strengthening region and a tunnel bottom strengthening region respectively. The method comprises the following steps: (1), a lateral soil body of a tunnel is strengthened to form the lateral strengthening region; and (2), a soil body at the bottom of the tunnel is strengthened to form the tunnel bottom strengthening region. The method implements the partition strengthening measures with significant purposes and targets according to stress characteristics and deformation characteristics of the tunnel structure, so that the sedimentation of the tunnel structure due to train vibration loads is reduced to a certain extent at the same time of effectively modifying tunnel stress performances occurring in the weak stratum; and the method has wide application benefits.
Description
technical field [0001] The invention relates to the technical field of civil engineering, in particular to a partitioned reinforcement method for tunnels passing through weak strata. Background technique [0002] With the acceleration of urbanization, the construction of underground facilities is changing with each passing day, and tunnel engineering, as an underground structure, has also been built in large numbers. When the tunnel structure passes through many geological units, it will inevitably encounter weak strata. At present, when the tunnel passes through the weak ground, two methods are generally used: ground pre-reinforcement and in-cave reinforcement. For the reinforcement in the tunnel, the method of grouting in the tunnel is generally adopted. Specifically, it is divided into two types: full section or only reinforcement of the base. The role and necessity of reinforcement have not been clarified from the perspective of optimizing the force and deformation of t...
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IPC IPC(8): E02D3/12E02D15/02
Inventor 王腾飞殷怀连谢俊孙文昊石太伟张俊龙郭磊
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP