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Tunnel compound lining design method including secondary lining under multiple loads

A technology of secondary lining and design method, applied in the field of tunnel engineering, can solve the problems such as the inability to obtain the safety factor of composite lining, the inability to guarantee the safety and economy of the project, and the inability to achieve quantitative design, so as to improve safety and efficiency. Economical, the solution process is simple and easy to operate, and the effect of ensuring reliability and safety

Active Publication Date: 2022-04-01
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

This method is highly subjective in the selection of the pressure sharing ratio of the surrounding rock of the second lining, and the overall safety factor of the composite lining cannot be obtained, so this method cannot achieve quantitative design, and thus cannot guarantee the safety and economy of the project

Method used

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  • Tunnel compound lining design method including secondary lining under multiple loads
  • Tunnel compound lining design method including secondary lining under multiple loads
  • Tunnel compound lining design method including secondary lining under multiple loads

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Embodiment Construction

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0062] Such as figure 1 The embodiment of the present invention provides a design method for a composite lining tunnel including a secondary lining 7 under multiple loads. layer composite structure, the external load 4 borne by the secondary lining 7 includes not only the surrounding rock pressure, but also other loads including water pressure, dead load of structural accessories, aerodynamic force and other loads. Therefore, the secondary lining 7 is multi-lo...

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Abstract

The invention relates to a tunnel composite lining design method including secondary lining under multiple loads. The secondary lining not only bears surrounding rock pressure, but also bears loads such as water pressure and additional dead load of the structure; through the distribution of safety factors, the anchor Rod-surrounding rock-bearing arch, shotcrete layer, and secondary lining safety factor, and the corresponding initial design parameters are obtained through their respective calculation models and surrounding rock pressure. Re-determine the parameters of the secondary lining so that the safety factor of the secondary lining under the load combination of surrounding rock pressure, water pressure, and additional dead load of the structure is not lower than the assigned safety factor of the secondary lining. Then according to the timing of the second lining construction, check whether the parameters of the second lining can meet the safety factor requirements of the code as a single structure, and obtain the parameters of the second lining that meet the requirements. Compared with the initial design parameters of the second lining, check and adjust the anchor The assigned value of the safety factor of the surrounding rock bearing arch and the sprayed layer can determine the parameters of the anchor rod and the sprayed layer, and realize the quantitative design of the composite lining.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a tunnel composite lining design method including secondary lining under multiple loads. Background technique [0002] At present, the parameters of the composite lining support of high-speed railway tunnels are mainly designed using the engineering analogy method. Both the support and the secondary lining are the main body of load, and the secondary lining shares 50-70% of the surrounding rock pressure. Its essence is to calculate the secondary lining separately by multiplying the surrounding rock pressure by the reduction factor, self-weight and equipment load as the main load, and aerodynamic force as the additional load, and meet the safety factor requirements of the code. This method is highly subjective in the selection of the pressure sharing ratio of the surrounding rock of the second lining, and the overall safety factor of the composite lining ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
Inventor 肖明清徐晨孙文昊邓朝辉薛光桥
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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