An overview of the Seikan tunnel project

Matsuo, Shogo

doi:10.1016/0886-7798(86)90015-5

Cited by 21 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is an essential design parameter affecting the stability and the cost of underwater tunneling [22]. Moreover, the minimum cover thickness of underwater tunnels significantly differs from case to case [23,24], and, currently, there is no international standard to estimate its value.…”

Section: Introductionmentioning

confidence: 99%

Stability of Shield-Bored Tunnel for the Challenge of Nile Crossing

Elgamal

Elfaris²

2021

Infrastructures

View full text Add to dashboard Cite

Underwater tunnel structures are vital in urban areas, and their use is continuously increasing. The engineering assessments for these impressive phenomena have to be performed from both geotechnical and structural engineering perspectives. The designer should take account of the requirements of the underwater structures to adequately withstand different applied loads. The underwater tunnel might be particularly vulnerable at locations where the geological conditions are uncertain. This study will cover all aspects concerning the stability of the tunnel crossing of the River Nile. The protentional exists for the tunnel failure during construction due to insufficient cover thickness and after construction due to a combination of long-term degradation and local scour. There were no imposed constraints on the alignment and the original design with a cover between the tunnel crown and the riverbed of at least one tunnel diameter. The tunnel stability was analyzed based on the most critical underwater section with a minimum cover thickness of the Greater Cairo Metro, Line 2 as the case study. Then, three-dimensional (3D) numerical analysis based on the Finite Element (F.E.) models was employed to explore soil–tunnel interactions. Comparison between numerical models’ results indicated that the safe cover thickness was equal to the tunnel diameter. The minimum cover thickness can be used to verify the required factor of safety calculated by theoretical analysis. The safety factor of the tunnel stability should not be less than 1.5 for construction and service stages and 1.3 for the exceptional case; scour accrues.

show abstract

Section: Introductionmentioning

confidence: 99%

Stability of Shield-Bored Tunnel for the Challenge of Nile Crossing

Elgamal

Elfaris²

2021

Infrastructures

View full text Add to dashboard Cite

show abstract

“…Tunnel construction is affected by environment, technology, and management and is prone to safety accidents. For example, the world-famous Seikan Tunnel in Japan had four major flooding accidents during its 16-year construction period, with the maximum volume of water ingress being 121.000 m [1]. In Norway, the Vardø Tunnel had two collapses during construction; the Ellingsøy Tunnel collapsed during construction because the working face was in a fault and fragmentation zone, and the top of the tunnel collapsed by 8-9 m; construction of the Oslofjord Tunnel was halted because of flooding problems, and the tunnel was only completed with difficulty by using the freezing method [2].…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment System Based on Fuzzy Composite Evaluation and a Backpropagation Neural Network for a Shield Tunnel Crossing under a River

Liang

Jin

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

Constructing a shield tunnel that crosses under a river poses considerable safety risks, and risk assessment is essential for guaranteeing the safety of tunnel construction. This paper studies a risk assessment system for a shield tunnel crossing under a river. Risk identification is performed for the shield tunnel, and the risk factors and indicators are determined. The relationship between the two is determined preliminarily by numerical simulation, the numerical simulation results are verified by field measurements, and a sample set is established based on the numerical simulation results. Fuzzy comprehensive evaluation and a backpropagation neural network are then used to evaluate and analyze the risk level. Finally, the risk assessment system is used to evaluate the risk for Line 5 of the Hangzhou Metro in China. Based on the evaluation results, adjustments to the slurry strength, grouting pressure, and soil chamber pressure are proposed, and the risk is mitigated effectively.

show abstract

Ground probing and treatments in rock TBM tunnel to overcome limiting conditions

Peila

Pelizza

2009

J Min Sci

View full text Add to dashboard Cite

An overview of the Seikan tunnel project

Cited by 21 publications

References 0 publications

Stability of Shield-Bored Tunnel for the Challenge of Nile Crossing

Stability of Shield-Bored Tunnel for the Challenge of Nile Crossing

Risk Assessment System Based on Fuzzy Composite Evaluation and a Backpropagation Neural Network for a Shield Tunnel Crossing under a River

Ground probing and treatments in rock TBM tunnel to overcome limiting conditions

Contact Info

Product

Resources

About