长江科学院院报2016，Vol.33Issue(6)：58-64,69,8.DOI:10.11988/ckyyb.20150490
建筑基坑防渗墙渗流控制效果研究
Efficiency of Seepage Control of Cut-off Wall in Building’ s Foundation Pit
摘要
Abstract
Cut⁃off wall is widely used to control the seepage field for building’ s foundation pit, but the efficiency of cut⁃off wall is not known very well. In the background of the common foundation of double layers in Wuhan of Chi⁃na, a model was set up for the seepage field around a typical building foundation pit. Through numerical simula⁃tion, the law of seepage field control for cut⁃off wall was revealed. Then the application of cut⁃off wall was discussed on the basis of the study results and engineering practices. It is pointed out that cut⁃off wall of closure type could control seepage field efficiently under the conditions that the cut⁃off wall is prevented from any defect and is extend⁃ed into reliable stratum with low permeability. The seepage control efficiency can be promoted to limited extent for the cut⁃off wall of suspension type with higher penetration rate which should be set reasonably with the cost, dura⁃tion, water discharge and safety being taken into account. An efficient seepage field control system must be formed by coordinating cut⁃off wall and drainage measures. The seepage field control system for a building foundation pit should be designed in consideration of adjacent buildings, flood control projects and other facilities in addition to geological and hydrological conditions. Then we can achieve the safety of foundation pit and control its adverse effect on environment. These conclusions are referential for the foundation pit of public works including metro engineering.关键词
基坑安全/防渗墙/贯入度/渗透比降/渗流控制/数值模拟Key words
safety of foundation pit/cut-off wall/penetration rate/hydraulic gradient/seepage field control/nu-merical simulation分类
建筑与水利引用本文复制引用
张家发,范士凯,陶宏亮,吴庆华..建筑基坑防渗墙渗流控制效果研究[J].长江科学院院报,2016,33(6):58-64,69,8.基金项目
国家自然科学基金项目（51279016，41402213）；中央级公益性科研院所基本科研业务费项目 （）
