基于流固耦合超大规模地下车站环境影响分析  

Environmental effects of large underground station based on coupled fluid-solid analysis

作　　者：曹瑞琅[1] 贺少辉[1] 齐法琳[2] 王芳[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中国铁道科学研究院基础设施检测研究所,北京100081

出　　处：《北京交通大学学报》2012年第4期66-71,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：铁道部科技发展计划重点项目资助(KCL10062530)

摘　　要：以京张城际铁路八达岭超大规模地下车站修建为例,依据工程区水文地质特征、水压致裂原地应力测量结果,利用有限差分软件FLAC3D建立三维渗流应力耦合模型,采用全封堵、全排水、非耦合、注浆限排4种方案进行数值模拟.结合理论分析,着重研究在饱水状况下八达岭车站修建前后的渗流场变化、涌水量、围岩变形和地表沉降等环境影响负效应因子,对因地下车站修建环境影响效应的显著性、空间分布特征和长期效应进行评价.模拟计算结果对于裂隙发育、富水地层地下工程尤其自然风景区大型地下洞室防排水设计和施工具有指导意义.In order to access the environmental effects of Badaling underground station project, numeri- cal analyses for the stability of surrounding rock were done with fast L,agrangian analysis of continua in three-dimension（FLAC3D）. Multiple factors were considered including surrounding rock classes, tun- nel depths, groundwater tables, construction methods and initial supporting systems. The models were divided into four classes which included the exclusion of underground water model, model with under- ground water seepage flow, model without underground water seepage flow, and a coupling analysis model with grouting reinforcement. According to the results of the displacement of rock mass, the pore pressure distribution and water gushing capacity, the significance, spatial distribution and long- term effects of environmental effects were discussed and the degree of influence were studied as well. The achieved results can successfully applied to the guidance of the tunnel construction for waterproof- ing of underground station. Furthermore, the study results can provide a theoretical basis for the design of tunnel and underground works in aquifer strata.

关 键 词：环境影响 地下车站 水压致裂 流固耦合 涌水量 

分 类 号：TU91[建筑科学—建筑理论] X947[环境科学与工程—安全科学]