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Method for determining capability of resisting slab staggering and expanding deformation of joints between shield tunnel lining rings

A technology for shield tunnels and lining rings, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the inability to accurately determine the amount of deformation between tunnel rings.

Inactive Publication Date: 2015-04-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the limitations of the model itself, the existing technical literature cannot accurately determine the amount of inter-ring deformation of the tunnel

Method used

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  • Method for determining capability of resisting slab staggering and expanding deformation of joints between shield tunnel lining rings
  • Method for determining capability of resisting slab staggering and expanding deformation of joints between shield tunnel lining rings
  • Method for determining capability of resisting slab staggering and expanding deformation of joints between shield tunnel lining rings

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Embodiment

[0043] figure 1 It is a schematic diagram of the opening of the annular seam and the staggered platform between the rings in the longitudinal deformation of the shield tunnel, in which (a) is a schematic diagram of the opening of the annular seam; and (b) is a schematic diagram of the staggered platform between the annulus.

[0044] This embodiment is described by taking a subway section tunnel in Shanghai as an example, and the subway section tunnel is constructed by the shield method. In the long-term operation, due to the impact of adjacent construction, local settlement deformation occurred.

[0045] The first step is the design information of the tunnel lining, concrete segments and ring bolts: the outer diameter of the tunnel lining is 6.2m, the inner diameter of the tunnel is 5.5m, and the ring width is 1m. The modulus of elasticity of the concrete segment is E s =3.45×10 7 kPa, shear modulus G s =2.15625×10 7 kPa. The rings are connected by 17 M30 bolts, the leng...

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Abstract

The invention provides a method for determining the capability of resisting slab staggering and expanding deformation of joints between shield tunnel lining rings. The method comprises the steps that firstly, the design information of a shield tunnel is obtained; secondly, the longitudinal equivalent bending rigidity and the longitudinal equivalent shearing rigidity of a Timoshenko beam tunnel model are determined by combining the lining design information of the tunnel and the design information of the shield tunnel; thirdly, measuring points are embedded in a track bed of the tunnel, and the settlement volumes of all the longitudinal lining rings of the tunnel are determined; fourthly, fitting is conducted on settlement monitoring values of the tunnel through the Gaussian curve, a fitting equation of a settlement curve is obtained, and the range of the influence of a settlement funnel is judged; fifthly, rotating angles of the lining rings of the tunnel are determined by using the fitting equation of the settlement curve and combining the longitudinal equivalent bending rigidity and the longitudinal equivalent shearing rigidity of the tunnel; sixthly, the expansion amount of the joints of the rings and / or the slab staggering amount between the rings are / is determined. The method is simple, practical, convenient to popularize and suitable for determining the capability of resisting slab staggering and expanding deformation of the joints between the shield tunnel lining rings.

Description

technical field [0001] The invention relates to a method in the technical field of construction engineering, in particular to a method for determining the resistance to shearing and opening deformation of shield tunnel lining annular joints. Background technique [0002] With the rapid development of my country's economy and the continuous acceleration of the urbanization process, problems such as rapid population expansion and ground traffic congestion in many cities have become increasingly prominent. Urban rail transit has become one of the very important transportation facilities in large and medium-sized cities due to its advantages of large transportation capacity, convenience and speed, and little impact on the surrounding environment. Subway tunnels in soft ground are often constructed using the shield method, and the lining is assembled from concrete segments and connected by bolts. The structural form of the shield tunnel makes there are a large number of joints b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 吴怀娜沈水龙刘晓雪许烨霜钱庄
Owner SHANGHAI JIAO TONG UNIV
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