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Real-time feedback grouting method for correcting horizontal deformation of subway tunnel

A technology of horizontal deformation and real-time feedback, applied in the test, construction, instrument and other directions of the basic structure, it can solve the problem of not being able to feedback the control direction of the slurry in real time, and achieve the effect of avoiding excessive deviation correction.

Inactive Publication Date: 2019-08-09
TIANJIN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the lack of real-time feedback control and grout control direction of the traditional compensation grouting correction technology, the present invention proposes a feedback grouting method for correcting the horizontal deformation of subway tunnels

Method used

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  • Real-time feedback grouting method for correcting horizontal deformation of subway tunnel
  • Real-time feedback grouting method for correcting horizontal deformation of subway tunnel

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Embodiment 1

[0031] as attached figure 1 and figure 2 As shown, the present invention is a real-time feedback grouting device for correcting horizontal deformation of subway tunnels. During construction, firstly, a TRD cement-soil mixing wall 5 is constructed in the soil body 6 adjacent to the tunnel 1 that has undergone horizontal unilateral tensile deformation. The net distance is 3-5m. During the construction process, in order to reduce the further disturbance and deformation of tunnel 1, the construction speed of TRD was reduced to the minimum. At the same time, cement, alkali slag and fly ash are uniformly mixed according to the mass ratio of 5:3:2 to carry out the construction of TRD mixing wall 5. After the construction is completed, wait until the cement-soil mixing wall 5 reaches the design strength, and then carry out the pre-embedded construction of the sleeve valve pipe 3 . Drill the pre-embedded sleeve valve pipe 3 between the TRD cement-soil mixing wall 5 on the site and...

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Abstract

The invention discloses a real-time feedback grouting method for correcting horizontal deformation of a subway tunnel. The real-time feedback grouting method comprises the steps that (1) a cement-soilmixing wall made of improved materials is arranged on one side in the opposite direction of a sleeve valve pipe-tunnel; (2) sleeve valve pipes are pre-embedded in the adjacent side of a deformed tunnel; (3) a real-time monitoring device is installed on the tunnel section, and tunnel deformation is fed back in real time in the grouting process; and (4) grouting construction is carried out, grouting parameters are adjusted in real time based on measured data. According to the real-time feedback grouting method for correcting the horizontal deformation of the subway tunnel, the deformation of the target tunnel is monitored and fed back in real time, the grouting construction parameters can be adjusted in real time, and the purpose of accurately correcting the deformation of the tunnel is achieved by cooperatively using novel double-liquid slurry with added sodium silicate. Meanwhile, a one-sided slag-fly ash cement-soil mixing wall is adopted to control the direction of slurry action, and a grouting deformation control effect is fed back to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of underground engineering construction, and in particular relates to a feedback grouting method which is arranged on the adjacent side of a tunnel and corrects its horizontal deformation. Background technique [0002] The process of urbanization has accelerated the development and utilization of underground space, and urban underground rail transit, as a way to effectively relieve urban traffic pressure, has emerged worldwide. With the construction and operation of a large number of urban subways, the protection of existing subway lines has become an unavoidable problem. The shortage of land in the process of urban construction has resulted in the construction of a large number of adjacent existing tunnels, and the highly deformation-sensitive characteristics of subway shield tunnels have made mm-level deformation control an inevitable requirement. [0003] The piled load, excavation and construction distu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/00E02D33/00G01B11/02G01B21/32
CPCE02D15/00E02D33/00G01B11/02G01B21/32
Inventor 杜一鸣郑刚刁钰程雪松
Owner TIANJIN UNIV
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