摘要
以北京地铁隧道工程为案例,探索在持续降雨的过程中隧道上覆岩体的含水量不断提高,对隧道衬砌顶板、拱肩及拱腰关键部位的应力影响特点以及隧道衬砌最大主应力分布特点,分别设计上覆岩体含水量为10%、15%、20%、25%、30%五种工况,利用FLAC3D有限差分软件进行数值模拟分析计算,得出了含水率对垂直应力和水平应力的影响情况。在不同降雨工况下,对研究区域设计了不同的下凹式绿地雨水渗蓄优化方案,计算出了下凹式绿地在暴雨期间的雨水蓄渗能力,得出了不同工况下凹式绿地雨水渗蓄方案。
Taking the Beijing Metro tunnel project as a case,it explores that the water content of the overlying rock mass of the tunnel is continuously increased in the process of continuous rainfall,and the stress influence characteristics of the key parts of the tunnel lining roof,span and arch waist,as well as the characteristics of the maximum principal stress distribution of the tunnel lining,and the water content of the overlying rock mass is designed to be 10%,15%,20%,25%and 30%respectively,and the numerical simulation analysis and calculation are carried out by using FLAC3D finite difference software.The results show that the vertical stress increases with the increase of soil moisture content,but has little influence on the horizontal stress.In view of the extreme rainfall conditions,the optimization scheme of rainwater infiltration and storage of concave green space is designed for the study area,and the depths of the concave green space are 0.05m,0.1m and 0.15m respectively,and the rainwater infiltration capacity of the sunken green space during heavy rainfall is calculated.
作者
孙世国
武伟
高冰月
Sun Shiguo;Wu Wei;Gao Bingyue(School of Civil Engineering,North China University of Technology,Beijing 100144,China)
出处
《黑龙江工业学院学报（综合版）》
2023年第12期128-134,共7页
Journal of Heilongjiang University of Technology(Comprehensive Edition)
基金
国家自然科学基金课题资助(课题编号:41772335)。
关键词
地铁隧道
围岩含水率
应力状态
最大主应力
海绵城市
下凹式绿地
metro tunnels
surrounding rock moisture content
stress state
maximum principal stress
sponge city
sunken green space
