摘要
水文地质参数在地铁施工建设中至关重要,尤其是渗透系数.传统抽水试验对场地扰动大、成本高、周期长,且不能对各地层分层量化研究.利用南京某地铁站的水文地质测孔开展声纳渗流测量,高效快速获取了场地渗流流速的空间分布.各测孔的流速分布具有一致性,且与勘探得到的地层渗透特性吻合较好,能准确判断出强透水层的位置,为施工渗漏风险控制提供依据.另外,基于声纳渗流反演计算得到的场地渗透系数及影响半径与抽水试验的测量结果基本一致,充分说明本文提出的基于声纳渗流法的水文地质参数测量及评价方法的准确与可行性,可为地铁设计施工中渗流相关风险的控制及管理提供有力支撑.
The hydrogeological parameters,especially permeabilty coefficient,are important in the subway construction..The traditional pumping tests have significant disturbance to the site and cannot quantify permeability properties of ground separately.According to the sonar seepage measurements with hydrogeological boreholes conducted in some subway station of Nanjing,the spatial distribution of seepage velocity in the site was obtained eficiently.The seepage velocity distributions obtained in diferent holes had good consistency with each other and were in good agreement with the permeability properties from exploration.The location of the strong permeable stratum was identifed accurately,which could provide useful information for the control of leakage risk.Additionally,the permeability coefficient and radius calculated from the results of sonar seepage inversion calculation measurements agreed well with the results from the in-situ pumping tests,which verified the accuracy and feasibility of the hydrogeological parameters measurement and evaluation method based on sonar seepage method.Hence,the curent method could be applied in the design and construction of subway station and provide some strong support for the control and management of seepage-related risks.
作者
王鹏
Wang Peng(China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan Hubei 430063,China)
出处
《铁道建筑技术》
2019年第S01期18-23,共6页
Railway Construction Technology
关键词
声纳
水文地质
渗透系数
三维渗流场
sonar
hydrogeology
permeability cofficient
three-dimensional seepage field
作者简介
王鹏(1977一),男,甘肃天水人,高级工程师,主要从事地铁设计和研究方面的工作,E-mail:1236952@qq.com
