Processing Modflow在基坑疏干抽排水中的应用  

Application of Processing Modflow in drainage of foundation pit

作　　者：孙怀军[1] 李连营[1] 刘承磊[1] 

机构地区：[1]天津市勘察院,天津300191

出　　处：《世界地质》2016年第2期549-558,共10页World Geology

基　　金：天津津和荣4#地疏干抽排地下水论证项目(201411281)

摘　　要：以天津某基坑为研究对象,采用Processing Modflow数值模拟软件建立了地下水三维渗流与地面沉降耦合模型。模拟了基坑疏干抽排水在完成支护、止水帷幕施工条件下其周边地下水位和地面沉降的实时变化：即由于疏干抽排水引起的基坑周边约80 m内地下水水位降幅在0.90~82.15 cm之间,约80 m内地面沉降量在0.001~26.21 mm之间。模拟结果与后期监测数据吻合较好,能够较为真实的反映降水过程对周边环境的影响。Taking a foundation pit in Tianjin as the research subject,the authors established a three dimensional coupling model between groundwater flow and land subsidence by the Processing Modflow numerical simulation software. The real time change of the underground water level and land subsidence around the pit was simulated when the foundation pit dewatered and drained in case of the construction of supporting and water proof curtain：the value of underground water reduction caused by drainage of foundation pit is about between 0. 90 cm and 82. 15 cm around foundation pit within 80 m area. Within the 80 m area,the land subsidence is between 0. 001 mm and 26. 21 mm. The results are in good agreement with the latter monitoring data,which can reflect the influence of the precipitation process to the surrounding environment.

关 键 词：基坑 疏干抽排水 耦合模型 PROCESSING MODFLOW 天津 

分 类 号：TU992[建筑科学—市政工程]