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Multi-point back synchronous injection method of double circular shield tunnel

A synchronous grouting and double-circle shield technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problem that it is difficult to separately control the injection pressure and flow rate of the upper and lower pipes, and cannot fill the building void well. It is difficult to allocate the upper and lower two grouting pipes, etc., so as to avoid the difficulty of tunnel deflection control, facilitate on-site construction management, reduce operation difficulty and construction risk

Active Publication Date: 2010-03-17
SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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AI Technical Summary

Problems solved by technology

This change in form leads to the following problems: the injected grout cannot fill the construction voids around the shield machine well, especially when slow-setting or fast-setting double grout is used; it is difficult to reasonably distribute the upper and lower two grouts The amount of grout in the grouting pipe ensures the control of surface subsidence; it is also difficult to separately control the injection pressure and flow rate of the upper and lower pipes to ensure the injection effect
There are few successful cases of double-circle shields used at home and abroad, and there are still many problems in the grouting system

Method used

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  • Multi-point back synchronous injection method of double circular shield tunnel
  • Multi-point back synchronous injection method of double circular shield tunnel
  • Multi-point back synchronous injection method of double circular shield tunnel

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Embodiment Construction

[0018] The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

[0019] like image 3 As shown, the labels 1-4 respectively represent: the segment structure 1, the double liquid slurry pump 2, the grouting hole 3, and the center column 4.

[0020] like image 3 Shown, the construction process of the present invention is as follows:

[0021] 1) Establish the artificial neural network prediction and fuzzy logic control model and algorithm for shield construction deformation and the volume of the shield tail building void to be filled, and calculate the construction at the next moment from the known deformation and change of the ground surface (stratum) at the current moment The change amount (control amount) of the controllable parameter is used to determine the synchronous grouting amount. At ...

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Abstract

The invention relates to the technical field of safety protection of shield construction, in particular to a multi-point back synchronous injection method of a double circular shield tunnel. The method relates to a pipe piece structure forming the double circular shield tunnel; the wall of the pipe piece structure is provided with an injection hole which is internally provided with a total station; and the invention is characterized in that the method carries out synchronous injection by at least two injection holes. The multi-point back synchronous injection method has the advantages of: avoiding the defects that the ground settlement is large and the tunnel deflection control is difficult, improving the construction quality of the double circular shield tunnel, reducing the operation difficulty and construction risk of operators of the double circular shield tunnel and being beneficial to site construction management.

Description

technical field [0001] The invention relates to the technical field of safety protection for shield construction, in particular to a synchronous grouting method behind multi-point walls of a double-circle shield tunnel. Background technique [0002] Synchronous grouting process of double circular shield (such as figure 1 (shown) is very different from the traditional single-circle shield, and the difference of synchronous grouting is mainly reflected in the arrangement of the grouting pipe, the grout ratio and the change of the corresponding physical properties. The double-circle shield machine generally adopts the two-point grouting form at the upper and lower seagull blocks, using double liquid slurry; while the ordinary single-circle shield adopts the four-point grouting form, using inert slurry. This change in form leads to the following problems: the injected grout cannot fill the construction voids around the shield machine well, especially when slow-setting or fast-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/04
Inventor 赵国强戴慧丽沈君华张理民张庆贺
Owner SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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