A method for rectifying deflection and correcting deflection of shield tunnel
A technology of shield tunneling and shield segments, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as uneven settlement and longitudinal unevenness of shield tunnels, and achieve good economic and social benefits, reliable The effect of correcting and correcting problems
Active Publication Date: 2018-08-07
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is: in view of the above-mentioned existing problems, a method for rectifying the deformation of the shield tunnel is provided, in order to solve the problem of correcting the "duck-egg shape" deformation of the shield tunnel and the longitudinal uneven settlement or uneven settlement of the shield tunnel. Problems such as correction of uniform horizontal displacement
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[0014] Such as figure 1 , figure 2 and image 3 As shown, the present embodiment is a method for deflection correction of a shield tunnel. For the shield tunnel I1 before deflection correction, a number of small holes 3 radially pierced through the segments are drilled on the shield segment, and through these small The hole uses a high-pressure water gun to disturb the soil on the back of the deformed segment, and excavates and drains the disturbed soil and water with an earth taker to reduce the force of the soil on the segment (i.e., earth pressure); The deformation of the shield tunnel is gradually reduced, and the deformation of the shield tunnel is corrected or the deflection correction effect is achieved, forming the shield tunnel II2 after the correction and deflection correction; The small radial holes on the segments are used for grouting reinforcement of disturbed soil.
[0015] The specific implementation method of this embodiment is as follows:
[0016] 1. Seg...
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The invention belongs to the technical field of geotechnical engineering, and particularly relates to a method for correcting and rectifying the deformation of a shield tunnel. The invention provides the method for correcting and rectifying the deformation of the shield tunnel, and solves the problems of correcting the oval-shaped deformation of the shield tunnel and rectifying the longitudinal uneven settlement or uneven horizontal displacement of the shield tunnel. The method for correcting and rectifying the deformation of the shield tunnel is technically characterized in that the method comprises the following steps of 1, drilling in segments: determining areas which need to be corrected and rectified, and drilling radial holes in corresponding tunnel segments, each segment being provided with 1-4 holes, the aperture of each hole being 50-110mm, and punching through the segments; and 2, utilizing a high-pressure water gun to disturb back soil bodies of the segments where deformation occurs, using a soil sampler to draw out and discharge soil and water from the disturbed soil, and after the correction and rectification for the shield tunnel deformation reach an expected effect, grouting and reinforcing the soil bodies at the backs of the segments. The method for correcting and rectifying the deformation of the shield tunnel is suitable for correction after the deformation of the shield tunnel and rectification after the uneven settlement or uneven horizontal displacement of the shield tunnel.
Description
technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a method for correcting deformation and deflection of a shield tunnel. It is suitable for correction after deformation of shield tunnel and correction after uneven settlement or horizontal displacement of shield tunnel. Background technique [0002] With the continuous development of urban rail transit, more and more cities regard subway construction as an important part of future urban planning, and a large number of subway construction projects have emerged and have been put into operation one after another. At the same time, especially for shield tunnels built in deep soft foundations, during the construction and operation stages, affected by the construction and operation of shield tunnels or the construction of foundation pits adjacent to shield tunnels, the structure of shield tunnels produces " "duck egg" deformation, uneven longitudinal settl...
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IPC IPC(8): E21D9/06E21D11/10
CPCE21D9/0607E21D11/10
Inventor 陈文华侯靖褚卫江苏锋王烨晟吴勇
Owner POWERCHINA HUADONG ENG COPORATION LTD
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