摘要
管道型岩溶突水是一个复杂的多场耦合的非线性渗流问题,致灾具有突发性。为揭示管道型岩溶突水灾害的发生机理,文章基于多物理场耦合作用机理,开展了不同溶腔水压、岩溶管道内不同填充介质、不同岩溶管道宽度及岩溶管道长度条件下的多场耦合分析。得到以下结论:(1)管道型岩溶破坏模式下发生的突水灾害,根据填充介质透水性能的异同而表现不同;(2)流体从富水溶腔中流出时流速较小,流经岩溶管道后流速逐渐增加,进入隧道后达到最大值;(3)影响突水过程的因素主要有:富水溶腔水压、岩溶管道或断层裂隙带内填充介质的种类、岩溶管道的宽度、隧道与水源的距离,其中,岩溶管道宽度及岩溶管道内填充介质类型对突水影响大于其他因素。
Water inrush in tunnels with karst conduits is a complex nonlinear seepage problem with multi-field coupling and may cause sudden disasters. In order to reveal the occurrence mechanism of water inrush in tunnels with karst conduits, this paper conducts a multi-field coupling analysis under the conditions of different water pressures in karst caves, different filling media in karst conduits and different karst conduit widths and lengths on the basis of the coupling mechanism of multiple physical fields, and draws the following conclusions:(1) water inrush disasters under the failure mode of karst conduits in tunnels are different depending on the difference in the permeabilities of the filling media;(2) the speed of the fluid flowing out of water-rich karst caves is low, but increases gradually after it flows through the karst conduits, and peaks when it enters the tunnel;(3) main factors affecting the water inrush process include: water pressure in water-rich karst cave, type of filling medium in karst conduit or fault fracture zone, width of karst conduit, and distance between tunnel and water source, of which the width of karst conduit and type of filling medium in karst conduit have a greater influence on water inrush than the other factors.
作者
陈仲达
林志
陈相
杨红运
陆原恩
赵益鑫
CHEN Zhongda;LIN Zhi;CHEN Xiang;YANG Hongyun;LU Yuanen;ZHAO Yixin(CCCC Third Navigation Engineering Bureau Co.,Ltd.,Shanghai 200032;State Key Laboratory of Mountain Bridge and Tunnel Engineering,Chongqing Jiaotong University,Chongqing 400074;Guangxi Xinfazhan Communication Group Co.,Ltd.,Nanning 530029)
出处
《现代隧道技术》
CSCD
北大核心
2022年第1期149-155,共7页
Modern Tunnelling Technology
基金
国家自然科学基金(52078089,51904043,52078090)
重庆市教委项目(KJQN201901240)
重庆市科委项目(cstc2021jcyj-msxmX1075)
万州区科委项目(wzstc-2019031)。
关键词
岩溶隧道
非线性渗流
多物理场耦合
突水灾害
填充类型
Karst tunnel
Nonlinear seepage
Multi-physical field coupling
Water inrush disaster
Filling type
