Deformation Control Method of Shield Tunnel During Adjacent Engineering Construction
A technology for shield tunneling and deformation control, which is applied in tunnels, mining equipment, earthwork drilling and mining, etc. It can solve the deformation of adjacent shield tunnels, has not yet had effective deviation correction, and has not yet formed a scientific, effective, and systematic protection and control method, etc. problems, to achieve the effect of protecting the shield tunnel, ensuring the construction progress and comprehensive cost of the project, and saving social costs
Active Publication Date: 2018-11-13
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology
[0003] Although there are many protective measures for the adjacent construction of subway shield tunnels, there are still some cases where adequate protection measures have not been taken to effectively control the deformation of adjacent shield tunnels; Although some deflection correction methods have been applied, there have been no successful cases of effective deflection correction.
It can be seen that for the deformation control and deviation correction of subway shield tunnels, no scientific, effective and systematic protection and control methods have been formed.
Method used
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[0033] Such as figure 1 As shown, this embodiment is a method for controlling deformation of a shield tunnel in the construction process of an adjacent project, and the specific steps are as follows:
[0034] a. Before the construction of the adjacent shield tunnel 1, monitor the shield tunnel 1, evaluate the current status of the shield tunnel and the impact of engineering construction on the shield tunnel, and propose the deformation control standard for the impact of engineering construction on the shield tunnel.
[0035] The current situation assessment of the shield tunnel 1 includes: obtaining the current deformation data of the subway shield tunnel to be evaluated, the structural parameters of the segments and the surrounding soil conditions; identifying the internal cracks and leakage points of the segments, and analyzing their positions and laws .
[0036] The impact assessment of engineering construction on shield tunnel includes: the impact mechanism and risk analy...
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The invention relates to a method for controlling deformation of shield tunnels in adjacent engineering construction procedures. The technical scheme includes that the method for controlling deformation of the shield tunnels in the adjacent engineering construction procedures is characterized by comprising evaluating current states of the shield tunnels and influence of engineering construction on the shield tunnels to obtain deformation control standards for the influence of engineering construction on the shield tunnels before engineering construction on adjacent shield tunnels is carried out; monitoring accumulated actual deformation values and deformation directions of the shield tunnels during engineering construction on the adjacent shield tunnels; controlling deformation by means of grouting in the deformation directions when the accumulated actual deformation values of the shield tunnels are larger than the deformation control standards. The method for controlling deformation of the shield tunnels in the adjacent engineering construction procedures has the advantages that deformation of the shield tunnels can be actively, effectively and dynamically controlled by the aid of the method, and the purposes of rectifying deviation of the shield tunnels and reinforcing the shield tunnels can be achieved; the method is applicable to the technical field of underground engineering.
Description
technical field [0001] The invention relates to a deformation control method of a shield tunnel during the construction process of an adjacent project. It is applicable to the technical field of underground engineering. Background technique [0002] With the development of my country's urban construction and the increase of public transportation pressure, the urban subway network is becoming more and more dense, and the construction of shield tunnels adjacent to the subway is increasing. Due to the complexity of the geology, the density of the urban subway network and the extensiveness of the engineering construction, the accidents of the excessive deformation of the subway shield tunnel caused by the adjacent engineering construction are increasing. Safety accidents such as subway train derailment, overturning, etc., and even interruption of subway lines. [0003] Although there are many protective measures for the adjacent construction of subway shield tunnels, there are...
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IPC IPC(8): E21D9/00
CPCE21D9/00E21D9/001
Inventor 单通刘世明卢慈荣曹奕彭孔曙许原骑陈娟臧延伟
Owner POWERCHINA HUADONG ENG COPORATION LTD