首页|Experimental study for joint leakage process of tunnel lining and particle flow numerical simulation
Experimental study for joint leakage process of tunnel lining and particle flow numerical simulation
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NSTL
Elsevier
? 2022 Elsevier LtdMost of urban ground collapses and tunnel failures are caused by joint leakage of shield tunnel lining. This paper conducts a series of model tests and particle flow simulations aiming to investigate the geo-hazards and explore the associated failure mechanism due to tunnel leaking. Based on critical width of leaky joint, taking leaky joint location, overburden depth and height of overlying water level as influencing factors, the settlement of the sand layer and the law of the water and sand loss is effectively predicted. Then, the focus is on designing a seepage tracer device to explore the distribution of the seepage field and its flow line variation. Finally, the particle flow numerical model of tunnel-sand is employed for the soil arching effect and flow line changes during seepage erosion to discover the fine scale influences of sand particle migration and loss around the shield tunnel on the surrounding environment.
Model testParticle flow simulationSeepage tracerTunnel leakageWater and sand loss
Zhang Z.、Mao M.、Cheng Z.、Wu Z.、Pan Y.、Zhang M.、Ma S.
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School of Environment and Architecture University of Shanghai for Science and Technology
Key Laboratory of Geohazard Prevention of Hilly Mountains (Ministry of Natural Resources) Fujian Key Laboratory of Geohazard Prevention
Faculty of Engineering Norwegian University of Science and Technology
Department of Civil Engineering Shanghai University
School of Civil Engineering and Architecture Guangxi University
NSTL
Elsevier
