摘要
以上海宝钢集团浦钢公司搬迁工程(特殊钢分公司部分)炉卷热轧机项目(第二批)旋流池基坑为例,通过抽水试验认识到含水层之间存在复杂越流,建立其合理的水文地质概念模型,基于该概念模型设计坑内-坑外联合作用的降水方案,群井试验验证了降水设计的正确性。工程实践表明,通过坑内-坑外抽水井的联合作用,完全达到预期降水效果,开挖过程中,坑内干爽。结合群井试验中出现的隔断承压含水层无法疏干,2口井抽水,停泵1口后,另一口抽水井水位恢复较快情况,基于试验数据预测地墙存在渗漏,建立应急预案,在问题出现后及时处理,避免重大工程事故的发生。此工程实践也可作为类似复杂地质条件下深基坑降水的参考依据。
Taking swirl pool deep pit, PU steel relocated project, Baoshan Iron and Steel Co., Ltd., as an example, the complex more flow of confined aquifer conditions is made clear through pumping test in field, and reasonable conception model is established. The design of deep pit dewatering with pumps inside and outside of pit is completed based on the conception model. The pumping test of well group verifies the reasonability of design, and the dewatering course indicates that the more flow conception model is reasonable, and the pit is dry during construction through the combined function of well group inside and outside of pit, which meets the control standard. In pumping test by opening two wells and resting one well, leakage of concrete wall is predicated and emergency measure is prepared. When the leakage of concrete wall emerged, reasonable measures were adopted in time and serious accident was avoided. The research results can provide a reference to similar project.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2010年第A01期3082-3087,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
上海市人才发展资金项目(2007)
上海市自然科学基金项目(10ZR1431500)
国家自然科学基金
雅砻江水电联合研究基金资助项目(50579097)
上海市重点学科(地质工程)(B308)
关键词
土力学
超深基坑
抽水试验
深基坑降水
地墙渗漏
工程应用
soil mechanics
super-deep foundation pit
pumping test in field
dewatering of deep pit
leakage of concrete wall
engineering application
