A Method for Determining Rigidity Matching of Underpass Railway Engineering

A railway engineering and stiffness technology, which is applied in the field of determining the stiffness matching of underpassing railway engineering, can solve the problems of unreasonable foundation reinforcement scheme, unsatisfactory reinforcement effect, and lack of design basis for the scheme, so as to reduce soil disturbance and reduce The effect of differential settlement of subgrade and low cost

Inactive Publication Date: 2017-04-05
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the analysis of existing cases, it is believed that most of the foundation reinforcement schemes for shield tunneling under the railway subgrade are unreasonable. a certain blindness
This not only causes a lot of waste, but also the reinforcement effect is not necessarily ideal

Method used

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  • A Method for Determining Rigidity Matching of Underpass Railway Engineering
  • A Method for Determining Rigidity Matching of Underpass Railway Engineering
  • A Method for Determining Rigidity Matching of Underpass Railway Engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The proposed single-line shield tunnel 1 crosses the railway subgrade 2 orthogonally (such as figure 1 as shown, figure 1 It is a schematic plan view of a method for determining stiffness matching of an underpass railway project according to an embodiment of the present invention. ), determine the geotechnical engineering properties within the appropriate depth range under the subgrade, and the specific parameters of the geotechnical engineering properties include soil modulus, cohesion or internal friction angle, etc. The outer diameter of the shield tunnel is 6.2m, the inner diameter is 5.5m, the segment ring width is 1.2m, and the buried depth at the top is 15m. The shield tunneling railway project is located in a soft soil area, where there is a deep clay layer, and the compression modulus of the undisturbed soil body 3 is about E s = 6MPa.

[0025] In the actual construction of the shield passing through the railway project, the application of the present invent...

Embodiment 2

[0032] The proposed single-line shield tunnel crosses the railway embankment orthogonally, and the geotechnical engineering properties within the appropriate depth range under the embankment are determined. The specific parameters of the geotechnical engineering properties include soil modulus, cohesion or internal friction angle, etc. The outer diameter of the shield tunnel is 6.2m, the inner diameter is 5.5m, the segment ring width is 1.2m, and the buried depth at the top is 12m. The shield tunneling railway project is located in a soft soil area, where there is a deep and thick clay layer, and the compression modulus of the undisturbed soil is about E s = 6 MPa.

[0033] In the actual construction of the shield passing through the railway project, the application of the present invention to carry out the stiffness matching design specifically includes the following steps:

[0034] In the direction of the tunnel cross section, the soil around the tunnel is matched with the ...

Embodiment 3

[0041] The proposed single-line shield tunnel crosses the railway embankment orthogonally, and the geotechnical engineering properties within the appropriate depth range under the embankment are determined. The specific parameters of the geotechnical engineering properties include soil modulus, cohesion or internal friction angle, etc. The outer diameter of the shield tunnel is 6.2m, the inner diameter is 5.5m, the segment ring width is 1.2m, and the buried depth at the top is 18m. The shield tunneling railway project is located in a soft soil area, where there is a deep and thick clay layer, and the compression modulus of the undisturbed soil is about E s = 6 MPa.

[0042] In the actual construction of the shield passing through the railway project, the application of the present invention to carry out the stiffness matching design specifically includes the following steps:

[0043] In the direction of the tunnel cross section, the soil around the tunnel is matched with the ...

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Abstract

The invention discloses a method for determining stiffness matching of under-cross railway engineering. The method comprises the following steps that firstly, the engineering property of rock-soil bodies under a roadbed is determined, and then stiffness matching design is carried out in relevant areas with a tunnel as the center in the cross section direction of the tunnel. The method for stiffness matching design of shield under-cross railway engineering of soft soil areas is safe, reliable, scientific, reasonable and low in cost; through a reasonable partition scheme and the stiffness matching design, smooth transition of the structural stiffness is achieved, differential settlement of the roadbed can be effectively controlled, and safe operation of a train is guaranteed. The method guarantees stability of a tunnel face, and a shield is made to smoothly penetrate through the railway roadbed.

Description

technical field [0001] The invention belongs to the technical field of foundation engineering and relates to a method for determining the rigidity matching of an underpassing railway project. Background technique [0002] With the continuous development of urban construction, the development direction of urban transportation has gradually shifted to underground space, and more and more subways and road tunnels have been constructed. Against such a background, there are more and more cases of shield tunnels passing through railways. However, shield tunneling will inevitably disturb the ground, causing large displacements of the soil and differential settlement of the subgrade, especially in soft soil areas, where this phenomenon is more prominent. The differential settlement of the subgrade will inevitably lead to the deformation of the track structure, affect the comfort of the train, and even threaten the safe operation of the train. [0003] In order to ensure the safe o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/00E21D9/00
Inventor 周顺华刘建红陈翰宫全美赵忠成肖军华季昌
Owner TONGJI UNIV
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