地铁车站止水帷幕对南京秦淮河古河道地下水流场的影响分析  

Analysis on influence of subway station waterproof curtain on groundwater flow field of Qinhuai ancient channel

作　　者：童立元[1,2] 郑灿政 张明飞[1,2] 车鸿博 

机构地区：[1]东南大学岩土工程研究所,南京210096 [2]东南大学江苏省城市地下工程与环境安全重点实验室,南京210096 [3]济南轨道交通集团有限公司,济南250101

出　　处：《东南大学学报（自然科学版）》2016年第A01期190-196,共7页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(41572273);"十二五"国家科技支撑计划资助项目(2012BAJ01B02)

摘　　要：以横穿秦淮河古河道的南京地铁1号线许府巷站为例,研究探讨了古河道含水层中设置大深度止水帷幕-地下连续墙前后以及不同止水帷幕插入含水层深度情况下地下水渗流场的变化规律.结果表明,在古秦淮河这一特殊水文地质条件下,地铁车站止水帷幕对地下水流场的影响比较严重,纵向影响范围达200 m以上;止水帷幕在墙前后引起一定程度的地下水头差,由此诱发附加土体沉降、地下结构物两侧不对称荷载或者其他工程灾害;止水帷幕插入承压含水层不同深度的情况下,地下水流场的变化规律各不相同,插入深度越大,影响越明显.Taking one subway station of the Line 1 of Nanjing subway as an example, the groundwater seepage field features are analyzed under different conditions ： before and after the setting of waterproof curtain; different setting depth of the curtain in the aquifer. The results show that the waterproof curtain has serious barrier effects on the groundwater flow field of the ancient Qinhuai River channel. The longitudinal impact distance reaches more than 200 m before and after the curtain. A certain degree of groundwater head difference will be caused before and after the curtain, which induces the additional settlement of soil, the unsymmetrical load on undergrotmd structures or other engineering problems. The groundwater flow fields are different when the setting depths of curtain are not identical. The influence will increase significantly when the setting depth becomes larger.

关 键 词：秦淮河古河道 地铁车站 止水帷幕 地下水 屏障效应 

分 类 号：TU42[建筑科学—岩土工程]