摘要
城市湖底隧道的防水直接关系到隧道的运行安全。为对隧道混凝土的防水性能进行分析,基于真实的湖底隧道结构,建立了三维湖底隧道数值模型,在FLAC 3D中模拟了隧道在不同水深和覆土厚度情况下的渗流情况,得到了不同情况下隧道孔隙水压力云图。研究发现孔隙水压力最大处位于隧道顶部及两边外侧,需要重点加强这些区域的防渗措施。采用数值方法对比了不同防渗层厚度下混凝土的抗渗性能,结果表明防渗层厚度增加,混凝土的抗渗效果明显提升。
Waterproofing of the urban under-lake tunnels is directly related to the operation safety of tunnel projects.In order to analyze the waterproof performance of the tunnel,this paper establishes a three-dimensional numerical model of the tunnel under the lake based on the real tunnel structure,simulates the seepage state of the tunnel under different water depths and soil thickness through FLAC3D,and obtains the pore water pressure cloud map of the tunnel under different conditions.It is found that the maximum pore water pressure occurs at the top and outside of the tunnel,so improving anti-seepage measures shall be taken at these areas.After comparison of the anti-seepage performance of the concrete with different impermeable layer thickness by the numerical method,the results show that the anti-seepage performance of the concrete will be significantly enhanced with the increase of impermeable layer thickness.
作者
王昊
刘广
王静峰
张兴其
浦玉炳
严中
丁兆东
WANG Hao;LIU Guang;WANG Jingfeng;ZHANG Xingqi;PU Yubing;YAN Zhong;DING Zhaodong(School of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Hefei Municipal Design Research Institute Co.,Ltd.,Hefei 230009,China)
出处
《人民珠江》
2021年第10期63-67,共5页
Pearl River
基金
城市湖底明挖隧道结构防水及裂缝控制关键技术与应用研究(2019010312)。
关键词
湖底隧道
渗流
数值计算
混凝土
防渗层
under-lake tunnel
seepage
numerical calculation
concrete
impermeable layer
