Design and construction of TBM tunnel lining crossing active fault in Thessaloniki Metro Project, Greece

2020 ◽  
pp. 836-845
Author(s):  
E. Gavrielatou ◽  
D. Alifragkis ◽  
E. Pergantis
Keyword(s):  
Active Fault ◽  
Tunnel Lining ◽  
Metro Project ◽  
Design And Construction

The Durability Measures of the Lining of Newly Built Tunnels from Lining Disease of the Existing Tunnels

2011 ◽  
Vol 250-253 ◽  
pp. 2626-2631 ◽  
Author(s):  
Ji Meng Feng ◽  
Wen Ge Qiu ◽  
Mei Qun Li
Keyword(s):  
Initial Crack ◽  
Tunnel Lining ◽  
Benefit Design ◽  
Design And Construction

The 15 tunnels located in Line Chengkun, Baocheng and Dacheng were investigated by the authors. The tunnel disease was inducted and summarized, and the main disease forms and diseases reasons were analyzed.The five measures ( improve the compactness, control and reduce the initial crack, improve the toughness, reduce the second stiffness and mist curing) are proposed, and can improve the durability of the tunnel lining proved by large number indoor concrete test. The authors hope the results of this paper benefit design and construction.

Research on the Influence of New Shield Tunnel to Adjacent Existing Tunnel

2013 ◽  
Vol 295-298 ◽  
pp. 2985-2989 ◽  
Author(s):  
Yan Hua Han ◽  
Wen Hai Ye ◽  
Qi Fen Wei
Keyword(s):  
Tunnel Lining ◽  
Shield Tunnel ◽  
Design And Construction

The displacement and stress of adjacent existing tunnel at different times after the new tunnel built are calculated by FEA models with ANSYS. The effects of each counting parameter of tunnel lining to results are analyzed, and some conclusions are educed, which can give references to the design and construction of siminiar engineerings.

scholarly journals Hydromechanical Simulation of Tunnel Excavation in Rock Considering a Nearby Karst Cave

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Huiling Zhao ◽  
Fan Zhang ◽  
Xupeng Yao
Keyword(s):  
Surrounding Rock ◽  
Tunnel Lining ◽  
Karst Cave ◽  
Tunnel Engineering ◽  
Tunnel Excavation ◽  
Safety Issues ◽  
Karst Caves ◽  
Karst Areas ◽  
Rock Tunnel ◽  
Design And Construction

Tunnel excavation tends to be affected by karst cavities in karst areas. Some cavities that are at low risk of causing safety issues without treatment tend to be ignored in the design and construction of tunnels to reduce costs. It is necessary to gain a better understanding of the effect of such a cavity on the seepage around a tunnel, the deformation of the surrounding rock, and the stress of the tunnel lining. In this paper, a two-dimensional rock-tunnel hydromechanical model with a karst cave was established with FLAC3D finite difference software to simulate the tunnel excavation with the consideration of seepage. Numerical simulations were performed to analyze the deformation of the surrounding rock, the seepage field of the surrounding rock, and the stress of the tunnel lining, and the results were compared for scenarios when the karst cave is at different locations relative to the tunnel. These results can provide a reference for the design and construction of tunnel engineering in rock with karst caves.

scholarly journals SAN FRANCISCO'S SOUTHWEST OCEAN OUTFALL

1982 ◽  
Vol 1 (18) ◽  
pp. 146 ◽  
Author(s):  
Y. Eisenberg ◽  
D.D. Treadwell
Keyword(s):  
San Francisco ◽  
Active Fault ◽  
Major Element ◽  
Fault Zones ◽  
Clean Water ◽  
San Andreas ◽  
Ocean Outfall ◽  
The City ◽  
Design And Construction

The Southwest Ocean Outfall, with an overall length of 23,400 feet and a capacity of 450 million gallons per day, will be a major element of the Clean Water Program of the City and County of San Francisco, California, U.S.A. Offshore, the Outfall will cross one of the world's major active fault zones, the San Andreas. Outfall construction started in 1981 and is scheduled to be completed by early 1985. The shoreward 3,000 feet is being built from a pile-supported trestle; offshore, the Outfall conduit sections will be placed using a barge designed and built specifically for the project. Oceanographic, coastal, geotechnical, and seismic conditions pertinent to design are presented along with discussions of specific Outfall design and construction features.

scholarly journals Analysis of Damage Mechanism of Tunnel Lining Structure under the Coupling Action of Active Fault

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Guotao Yang ◽  
Sujian Ma ◽  
Liang Zhang ◽  
Xinrong Tan ◽  
Rui Tang ◽  
...  
Keyword(s):  
Plastic Zone ◽  
Active Fault ◽  
Failure Modes ◽  
Active Faults ◽  
Tunnel Lining ◽  
Tensile Failure ◽  
Damage Effect ◽  
Fault Movement ◽  
Boundary Area ◽  
Coupling Fault

To reveal the failure mechanism of tunnel structure under active fault movement, based on the pseudostatic elastoplastic finite element method, the failure modes of the tunnel lining are studied under different movement ratios of strike-slip faults and thrust faults with 45° dip angle by using numerical simulation. The results show that the range of significant lining failure section can be determined according to any direction of the coupling fault movement decomposition direction, and the damage effect is determined by the overall movement amount of the coupling fault. The significant damage area of the lining under the action of the coupling fault is the same as the area of deformation, which mainly manifests as tensile failure. Compressive failure occurs in the boundary area between the fracture zone and the hanging wall and foot wall. The plastic strain is the largest in the area where the arch waist and the arch bottom intersect. The development of tunnel lining plastic zone under coupling fault is from arch top and arch bottom to both sides of the arch waist. The development of the plastic zone under active fault is mainly determined by the form of fault with a large ratio. The research results can provide a reference for the design and safety evaluation of tunnel crossing active faults.

Sign in / Sign up

Export Citation Format

Share Document