首页|Disaster prevention and structural resilience of metro tunnels crossing active ground fissures in Xi'an, China
Disaster prevention and structural resilience of metro tunnels crossing active ground fissures in Xi'an, China
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NETL
NSTL
Elsevier
Ground fissures, a widespread and gradual geological hazard worldwide, are most extensively developed in Xi'an, China. This geological hazard poses a great challenge to the construction of the Xi'an Metro system. How to prevent and control metro disasters induced by active ground fissures is an important issue. To comprehensively understand the issue of ground fissures encountered by metro engineering, this paper provides a systematic review of the current status of metro project in ground fissure sites, including the determination of ground fissure activity, construction method selection, tunnel lining design, and structural countermeasures. First, the formation and distribution characteristics of active ground fissures were analyzed, as well as the adverse effects on metro tunnels. Subsequently, a detailed introduction was given to the current methods for determining the activity of ground fissures in engineering practice, which serve as the basis for tunnel design and construction methods. Next, based on the determination of construction and structural forms, the mechanical behaviors of metro tunnels under the action of ground fissures were analyzed, with special focus on the structural stress state, lining influence range, tunnel failure characteristics and modes, and applicable conditions. Finally, the current understanding, exploration of countermeasures, and repair plans for metro tunnels in ground fissure sites were expounded. In addition, the limitations of the current research were summarized, and followed by a discussion on the key direction for future research and practice, including probabilistic analysis of ground fissure activity, influence of groundwater fluctuation, and extreme climate-adaptive control measures of metro tunnels crossing ground fissures. The final aim is to establish a scientific framework for disaster prevention, improve structural resilience of underground facilities, and provide a technical demonstration for urban rail transit construction in areas with developed ground fissures.
Metro tunnelGround fissureConstruction methodTunnel failure characteristicsDisaster preventionStructural resilienceMODEL TESTFAILURE-MECHANISMLAND SUBSIDENCEDEFORMATIONPROFILE
NETL
NSTL
Elsevier
