铁道科学与工程学报2025，Vol.22Issue(3)：1369-1382,14.DOI:10.19713/j.cnki.43-1423/u.T20240862
降雨对江底凹形纵坡隧道排水池区段的影响及排水报警方法
Influence of rainfall on drainage pool section of tunnel under river with concave longitudinal slope and drainage alarm method
摘要
Abstract
If the road tunnel across the river in an inland city adopts the concave great longitudinal slope,and there is no connecting passage between the two caves.The drainage of water in the tunnel depends on the drainage pool under the driveway slab and in the lining ring located at the lowest point of the concave longitudinal slope.In order to find out the law of the influence of rainfall on the drainage pool section structure of the tunnel under the river and to prevent the occurrence of the accident,the five-year field investigation was carried out.The variation characteristic of river water level with rainfall was obtained.Then,based on the results of field investigation research,a three-dimensional numerical model was established by the numerical simulation.The effects of rainfall on the mechanical behavior of the lining structure and the built-in drainage pool structure of the tunnel with concave longitudinal slope under the river were studied.Finally,on the basis of field investigation and numerical simulation,the corresponding drainage alarm method was studied by programming and model test.The results are drawn as follows.The rise of the river level due to rainfall increases the axial force on the wall of the drainage pool in the longitudinal direction,mainly because the wall of the drainage pool at the lowest point of the concave longitudinal slope is eccentrically held by the structures on both sides of the slope.The leakage of lining structure caused by rainfall will affect the built-in drainage pool structure,so that the local internal force of the drainage pool wall increases obviously.When the drainage pool is filled with water caused by rainfall,the maximum compressive stress of the lining ring decreases slightly,but the bending moment on the top of the drainage pool wall increases obviously.The automatic water level sensors should be installed in the drainage pool,which can automatically alarm when the water level in the drainage pool respectively reached the warning water level of low water level,high water level and closing the tunnel water level,the corresponding PLC(Programmable Logic Controller)program is programmed to realize the above functions.The effectiveness of the PLC program is verified by the drainage alarm model test.The research results can provide references for tunnel health service and intelligent rain disaster prevention and control.关键词
降雨/江底隧道/凹形纵坡/排水池区段/力学影响/排水报警方法Key words
rainfall/tunnel under river/concave longitudinal slope/drainage pool section/mechanical effects/drainage alarm method分类
交通运输引用本文复制引用
袁立刚,冷伍明,姜涌,朱铁环,安永林,岳健..降雨对江底凹形纵坡隧道排水池区段的影响及排水报警方法[J].铁道科学与工程学报,2025,22(3):1369-1382,14.基金项目
湖南省自然科学基金资助项目(2021JJ30248) （2021JJ30248）
