Method for reinforcing sandwiched rock in adjacent laminated tunnel
A technology of tunnel and rock intercalation, applied in the field of reinforcement of rock intercalation in adjacent stacked tunnels, can solve problems such as poor rock intercalation bearing capacity, and achieve the effects of enhancing bearing capacity, improving stress conditions, and preventing excessive deformation.
Active Publication Date: 2019-10-11
CHINA CONSTR EIGHT ENG DIV CORP LTD
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the defects of the prior art, to provide a method for reinforcing interlayered rocks close to laminated tunnels, and to solve the problem of poor bearing capacity of interlayered rocks in small clear distance laminated tunnels. By reinforcing interlayered rocks, In order to enhance the bearing capacity of interlayer rock and reduce potential safety hazards
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0030] refer to figure 1 , the present invention provides a method for strengthening interlayered rocks close to laminated tunnels. Firstly, the initial lining is constructed in the lower tunnel and the formwork is set correspondingly, and then grouting is applied to the interlayered rocks outside the formwork, and then the initial lining is constructed in the upper tunnel and correspondingly installed. Set the formwork, and then inject grout to the interlayer outside the formwork, so that the interlayer rock is in a three-dimensional stress state, which improves the stress status of the interlayer rock during the subsequent construction process and the tunnel operation stage, and it is also beneficial to construct the lower tunnel first and grouting Ensure the safety of the upper tunnel construction, prevent excessive deformation of interlayer...
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The invention relates to a method for reinforcing a sandwiched rock in an adjacent laminated tunnel. The method for reinforcing the sandwiched rock in the adjacent laminated tunnel comprises the following steps: performing fore-poling on a lower tunnel and upper tunnel to be constructed, and excavating the lower tunnel to be constructed and correspondingly constructing the initial lining; providing a template, installing the template at a position of the sandwiched rock sandwiched between the lower tunnel and the upper tunnel corresponding to lower tunnel initial lining, and grouting the sandwiched rock through the template to form a first reinforcement structure; excavating the upper tunnel to be constructed and correspondingly constructing the initial lining; and installing the templateat a position of the sandwiched rock corresponding to upper tunnel initial lining, and grouting the sandwiched rock through the template to form a second reinforcement structure. The method for reinforcing the sandwiched rock in the adjacent laminated tunnel effectively solves the problem that the bearing capacity of the sandwiched rock in the small clear distance laminated tunnel is poor; and through the reinforcement of the sandwiched rock, the bearing capacity of the sandwiched rock is enhanced, and the safety hazard is reduced.
Description
technical field [0001] The invention relates to the field of tunnel construction, in particular to a reinforcement method for interlayer rock in a laminated tunnel. Background technique [0002] With the continuous increase of investment in my country's infrastructure industry, tunnel engineering construction has ushered in rapid development in recent years, and a number of laminated tunnel projects have emerged, and are developing in the direction of small clearance, multi-cavity, and large cross-section, providing tunnel design and construction brought new challenges. [0003] In the construction of laminated tunnels, the overall construction sequence of "first down and then up" is currently adopted, that is, the lower tunnel is constructed first, and then the upper tunnel is constructed, thereby reducing the overall construction risk of the tunnel group. Due to the multiple disturbances of the upper and lower tunnel construction, the upper and lower tunnels The interlayer...
Claims
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Login to View More IPC IPC(8): E21D11/00E21D11/10E21D11/18
CPCE21D11/00E21D11/10E21D11/105E21D11/18
Inventor 王国欣肖龙鸽仇文革王勇李金会苏井高丁涯周旻娴
Owner CHINA CONSTR EIGHT ENG DIV CORP LTD