Modified analytical solution of shield tunnel lining considering nonlinear bending stiffness of longitudinal joint

2020 ◽  
Vol 106 ◽  
pp. 103625 ◽  
Author(s):  
Fei Wang ◽  
Jingkang Shi ◽  
Hongwei Huang ◽  
Dongming Zhang
Keyword(s):  
Analytical Solution ◽  
Bending Stiffness ◽  
Tunnel Lining ◽  
Shield Tunnel ◽  
Nonlinear Bending ◽  
Longitudinal Joint

Analytical solution for a jointed shield tunnel lining reinforced by secondary linings

2020 ◽  
Vol 185 ◽  
pp. 105813
Author(s):  
Q.J. Chen ◽  
J.C. Wang ◽  
W.M. Huang ◽  
Z.X. Yang ◽  
R.Q. Xu
Keyword(s):  
Analytical Solution ◽  
Tunnel Lining ◽  
Shield Tunnel

Influence of Segment Design of Shield Tunnel on the Magnitude of Joint Opening

2010 ◽  
Vol 160-162 ◽  
pp. 698-703
Author(s):  
Yin Liu ◽  
Hong Wei Huang ◽  
Dong Mei Zhang
Keyword(s):  
Analytical Solution ◽  
Mechanical Model ◽  
Tunnel Lining ◽  
Shield Tunnel ◽  
Flexural Stiffness ◽  
Water Leakage ◽  
Joint System ◽  
Joint Opening ◽  
Influence Mechanism

It is obviously a simplification to consider the tunnel lining as uniformly permeable.In reality it is more likely that there are specific leaks assocoated with segmental lining joints. In the case of in situ concrete linings, construction joints can provide leakage paths, accounting for most of the water leakage. In this paper, based on the mechanical model of segment joint, the analytical expression of magnitude of joint opening was developed, in light of which, the occurrence of water leakage through the joint system can be judged. Taking the metro line No.1 in Shanghai as an example, effects of such parameters as joint flexural stiffness, bolt location, bolt stiffness, bolt prestress, etc. on the magninitude of the joint opening were analyzed respectively through the analytical solution. The results not only help us realize the influence mechanism of segment design on the magnitude of joint opening of the segmental linings, but also provide the guidance for waterproof design of the shield tunnel.

Soil-water inrush induced shield tunnel lining damage and its stabilization: A case study

2020 ◽  
Vol 97 ◽  
pp. 103290 ◽  
Author(s):  
Linchong Huang ◽  
Jianjun Ma ◽  
Mingfeng Lei ◽  
Linghui Liu ◽  
Yuexiang Lin ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Inrush ◽  
Tunnel Lining ◽  
Shield Tunnel

In-Place FE Modeling of Unbonded Flexible Pipelines Capturing Pressure Stiffening and Decoupled Axial/Nonlinear Bending Stiffness

2010 ◽  
Author(s):  
Edvin Hanken ◽  
Evelyn R. Hollingsworth ◽  
Lars S. Fagerland
Keyword(s):  
Water Injection ◽  
Bending Stiffness ◽  
Axial Stiffness ◽  
Fe Model ◽  
Nonlinear Bending ◽  
Upheaval Buckling ◽  
History Effects ◽  
System Integrity ◽  
Non Linear ◽  
Bending Behaviour

For fast track pipeline projects the need for costly installation vessels and sophisticated materials for rigid pipeline water injection systems, have made flexible pipelines a competitive alternative. They can be installed with less costly construction vessels, provide a competitive lead time and a corrosion resistant compliant material. Flexible pipelines have relative high axial stiffness and low non-linear bending stiffness which is a challenge to model correctly with FE for in-place analyses of pipelines. Whilst some FE programs can model the non-linear bending behaviour of a flexible pipeline at a given pressure, current FE tools do not include the effect of increased bending resistance as the system is pressurized. Therefore, a 3D FE model in ANSYS was developed to simulate the decoupled axial and nonlinear bending behaviour of a flexible, including the bend stiffening effect for increasing pressure. A description of the model is given in this paper. It will be demonstrated how the FE model can be used to simulate the 3D nonlinear catenary behaviour of an high pressure flexible pipeline tied into a manifold during pressurization. Due to high manifold hub loads during pressurization it is essential that such a model is capable of capturing all effects during pressurization to achieve an acceptable confidence level of the system integrity. It is also described how the FE model is used for upheaval buckling design, capturing non-linearities and load history effects that can reduce the conservatism in the design.

Non-linear spring model for backfill grout-consolidation behind shield tunnel lining

2021 ◽  
Vol 136 ◽  
pp. 104235
Author(s):  
Xiao-Xue Liu ◽  
Shui-Long Shen ◽  
Ye-Shuang Xu ◽  
Annan Zhou
Keyword(s):  
Tunnel Lining ◽  
Shield Tunnel ◽  
Spring Model ◽  
Non Linear ◽  
Linear Spring

Reasonable design method of shield tunnel lining under internal water pressure

2020 ◽  
pp. 857-860
Author(s):  
N. Okano ◽  
S. Konishi ◽  
K. Kobayashi ◽  
A. Koenuma ◽  
K. Ohishi ◽  
...  
Keyword(s):  
Design Method ◽  
Water Pressure ◽  
Tunnel Lining ◽  
Shield Tunnel ◽  
Internal Water

scholarly journals Application of Analytical Solution to Steady-State Temperature Field by Double-Row-Pipe Freezing and Verification with Field Measurement: A Case Study of Connected Aisle

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Zequn Hong ◽  
Xiangdong Hu
Keyword(s):  
Temperature Field ◽  
Steady State ◽  
Analytical Solution ◽  
Wall Thickness ◽  
Field Measurement ◽  
Field Analysis ◽  
Shield Tunnel ◽  
Double Row ◽  
Steady State Temperature ◽  
Frozen Wall

In order to solve the problem of sealing water and bearing capacity of a connected aisle in an underwater shield tunnel, a double-circle horizontal freezing method was adopted for ground reinforcement in the connected aisle of Maliuzhou Tunnel, which is China’s first shield tunnel with superlarge diameter built in a composite stratum. This paper proposed a new double-row-pipe freezing model for the calculation of frozen wall thickness based on analytical solution to steady-state temperature field. Besides, field measurement and transient numerical studies of the active freezing period were also carried out to study the freeze-sealing effect. The results show that frozen wall thickness obtained by analytical solutions agrees well with numerical simulation results, which verifies the applicability of the newly proposed calculation method. Field analysis indicates that soil temperature gradually approaches a stable value which is far below the freezing point, and a reliable water-sealing curtain can be formed around the designed connected aisle. Maximum impact of soil excavation on the frozen wall is about 10°C, and reducing exposure time of excavation surface can effectively alleviate the weakening of frozen wall. To obtain comprehensive analysis for freezing wall thickness, a more reasonable arrangement of temperature-measuring holes is expected in future freezing engineering.

Reliability Analysis of Shield Tunnel Lining in Service with Field Inspection

2020 ◽  
Vol 34 (6) ◽  
pp. 04020111
Author(s):  
Xiangchun Xu ◽  
Songyu Liu ◽  
Liyuan Tong ◽  
Hongjiang Li
Keyword(s):  
Reliability Analysis ◽  
Tunnel Lining ◽  
Shield Tunnel ◽  
Field Inspection
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