Optimal designing method for rigidity and construction time of weak rheological surrounding rock tunnel secondary lining structure

A technology of secondary lining and structural rigidity, applied in the direction of tunnel lining, tunnel lining, shaft lining, etc.

Active Publication Date: 2018-01-19
NINGBO COMM PLANNING INST CO LTD
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to solve the common problems in the design of the existing tunnel lining structure, and to provide an optimal

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  • Optimal designing method for rigidity and construction time of weak rheological surrounding rock tunnel secondary lining structure
  • Optimal designing method for rigidity and construction time of weak rheological surrounding rock tunnel secondary lining structure
  • Optimal designing method for rigidity and construction time of weak rheological surrounding rock tunnel secondary lining structure

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[0025] The present invention will be further elaborated and described below with reference to the accompanying drawings and specific embodiments.

[0026] Combined with the engineering practice of a rheological soft rock tunnel in a mountainous area, the structure of the secondary lining is optimized. Based on the calculation, operation and implementation of the above research results, the specific implementation of the method is described in this section as follows.

[0027]The gross width of the tunnel is 18.66m and the gross height is 12.71m. The entrance and exit are loose and broken rocks, shallow buried and buried tunnel sections, as well as the fault broken zone and joint dense zone in the tunnel, all of which are carried out using the optimized CRD construction method. The sequence of excavation steps is: the upper half section of the left pilot pit - the upper half section of the right pilot pit - the lower half section of the left pilot pit - the lower half section o...

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Abstract

The invention discloses an optimal designing method for the rigidity and construction time of a weak rheological surrounding rock tunnel secondary lining structure, and belongs to the technical fieldof civil engineering. According to the method, the rigidity and construction time of the weak rheological surrounding rock tunnel secondary lining structure are optimally designed by combining three-dimensional viscoelastic/viscoelastic-plastic numerical simulation computing with a convergence-constraint characteristic curve method. The method has the important practical engineering value except the theoretical significance and has very considerable economic benefits and a very significant effect on the main aspects of decreasing the earthwork excavation volume, reducing concrete and steel material consumption, shortening the construction period and the like.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to an optimal design method for the stiffness of the secondary lining structure of a tunnel with weak rheological surrounding rock and its construction timing. Background technique [0002] Since the beginning of the 21st century, my country's cross-mountain tunnels and various rock underground projects have achieved unprecedented rapid development, but there are problems in engineering design, such as: the fuzziness and random changes in the mechanical characteristics of the tunnel lining structure in each stress deformation stage Uncertainty of the load, uncertainty of mountain loads, incompleteness of underground engineering construction information, etc., all need to be systematically explored in depth to achieve the basic requirements of design safety, rationality, applicability and economy. [0003] In addition, due to the complexity of on-site constructio...

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Application Information

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IPC IPC(8): G06F17/50E21D11/00
Inventor 陈孟冲孙钧朱汉华荣耀张承客
Owner NINGBO COMM PLANNING INST CO LTD
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