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Construction method for restraining floating-up amount of shield tunnel segments

A technology of shield tunnel segment and construction method, which is applied in the field of shield tunnel segment construction, can solve the problem that the initial setting time cannot be guaranteed, and achieve the effects of reducing the floating amount of segment, convenient operation and simple material.

Inactive Publication Date: 2020-10-16
中建八局轨道交通建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is suitable for strata with low water content. Once the stratum with rich water content is encountered, the synchronous grouting slurry will be diluted by groundwater in a short time after being injected into the tail of the shield, and the initial setting time cannot be guaranteed.

Method used

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Embodiment Construction

[0018] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0019] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear ", etc., are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise specified and limited, terms such a...

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Abstract

The invention discloses a construction method for restraining the floating-up amount of shield tunnel segments. The construction method comprises the steps that holes are formed behind the assembled segments; water glass pipelines are arranged at the hole-opening positions of the segments; and when shield tunneling is performed, after the shield tail leaves the hole-opening positions, water glassis injected into the backs of the segments through the water glass pipelines, and the injection process is synchronized with the simultaneous grouting of shield. The openings are formed in the upper points of the backs of the segments, by utilizing the quick-setting characteristic of the water glass, slurry of simultaneous grouting is mixed with the water glass immediately when injected into the back of the segments, rapid condensation is achieved, upper gaps of the segments are filled, the floating-up amount of the segments is reduced, the use effect is good, and the suppression effect on thefloating-up amount of the segments is obvious, and the cost on tunnel defect treatment is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of shield tunnel segment construction, in particular to a construction method for suppressing the floating amount of a shield tunnel segment. Background technique [0002] With the rise of subways in China, shield construction technology has been widely used in the construction of subway tunnels due to its advantages of safety, speed and reliability. The shield segment is the main assembly component of the shield construction and the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads. The shield segment is the permanent lining structure of the shield tunnel. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel. During the construction of shield tunnels, some formations with high strength, good self-stability and small...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/06E21D11/08E21D11/10
CPCE21D9/0609E21D11/08E21D11/10
Inventor 柏春林王强刘记帅赵光旭葛付勇陈文轩
Owner 中建八局轨道交通建设有限公司