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A tunnel composite lining design method comprising secondary lining under the action of multiple loads

A technology of secondary lining and design method, applied in the direction of calculation, special data processing application, instrument, etc., can solve the problem that the safety and economy of the project cannot be guaranteed, the quantitative design cannot be achieved, and the safety factor of composite lining cannot be obtained. problems to ensure reliability and security

Active Publication Date: 2019-06-14
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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  • A tunnel composite lining design method comprising secondary lining under the action of multiple loads
  • A tunnel composite lining design method comprising secondary lining under the action of multiple loads
  • A tunnel composite lining design method comprising secondary lining under the action of 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 comprising secondary lining under the action of multiple loads. The secondary lining not only bears the surrounding rock pressure, butalso bears the water pressure, structure additional constant loads and other loads; and through the safety coefficient distribution, the safety coefficients of the anchor rod-surrounding rock bearingarch, the sprayed concrete layer and the secondary lining are obtained, and the corresponding initial design parameters are obtained through respective calculation models and surrounding rock pressure. The parameters of the secondary lining are planned again, so that the safety coefficient of the secondary lining under load combination of surrounding rock pressure, water pressure, structure additional constant load and the like is not lower than that of the distributed secondary lining. By checking whether the secondary lining parameters can meet the requirements of the standard for the safety coefficient of the single structure or not according to the secondary lining construction opportunity, and obtaining the secondary lining parameters meeting the requirements, and comparing with theinitial design parameters of the secondary lining, and checking and adjusting the safety coefficient distribution values of the anchor rod surrounding rock bearing arch and the spraying layer, the parameters of the anchor rod and the spraying layer are determined, and the quantitative design of the composite lining is realized.

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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IPC IPC(8): G06F17/50
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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