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

作　　者：袁立刚 冷伍明[1] 姜涌 朱铁环 安永林[3] 岳健[3] YUAN Ligang;LENG Wuming;JIANG Yong;ZHU Tiehuan;AN Yonglin;YUE Jian(School of Civil Engineering,Central South University,Changsha 410075,China;China Construction First Group Corporation limited,Beijing 100161,China;School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中国建筑一局(集团)有限公司,北京100161 [3]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《铁道科学与工程学报》2025年第3期1369-1382,共14页Journal of Railway Science and Engineering

基　　金：湖南省自然科学基金资助项目(2021JJ30248)。

摘　　要：内陆地区的城市越江道路隧道如果采用凹形大纵坡,又未在两洞之间设置联络通道时,排走洞内积水依赖于设在凹形纵坡最低处衬砌环内的行车道板之下的排水池。为了探明降雨对江底隧道排水池区段结构的影响规律以及预防事故的发生,首先,针对所研究隧道进行了5年的现场调查研究,获得了降雨影响下的隧道上方江水位的变化特性;然后,基于现场调查研究成果建立三维数值模型。通过数值模拟,研究降雨对江底凹形纵坡隧道排水池区段的衬砌结构与内置排水池结构的受力性状的影响;最后,在现场调查与数值模拟的基础上,通过编制程序与模型试验研究相应的排水报警方法。研究结果表明:降雨导致江水位上涨使排水池池壁沿纵向的轴力增大,主要是因为凹形纵坡最低处的排水池池壁受到了两边斜坡段结构的偏心夹持;如果降雨导致衬砌结构漏水,会牵连影响到内置的排水池结构,使排水池池壁局部的内力明显增大;如果降雨导致排水池充满水,虽然会使衬砌环的最大压应力有所减小,但会使排水池池壁顶部的弯矩明显增大;在排水池内安装水位自动传感器,当排水池内的水位达到低水位报警水位、高水位报警水位、关闭隧道报警水位时都能够自动报警,编制了相应的PLC(可编程逻辑控制器)程序以实现上述功能;并通过排水报警模型试验,验证了所编制的PLC程序是有效的。研究成果可为隧道的健康服役及其雨灾智能防控利用和参考。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

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 

分 类 号：U457[建筑科学—桥梁与隧道工程]