基坑降水中几个值得注意的问题  

SEVERAL NOTICEABLE PROBLEMS IN THE FOUNDATION PIT DEWATERING

作　　者：苏学清[1] 齐之龙[1] 郝玉生 卢玉南 

机构地区：[1]中国地质大学环境科学系,北京市100083 [2]广西建筑综合设计院勘察分院,南宁市530001

出　　处：《勘察科学技术》1999年第2期6-9,18,共5页Site Investigation Science and Technology

摘　　要：在含水层较浅的地区开挖基坑及基槽，都涉及到降水问题。降水成功与否直接影响到工程进度、费用甚至工程的安全，应引起高度重视。该文结合北京地区几个具体工程，论述了不同地层组合对基坑降水的影响以及开槽时间对降水井孔布置设计的影响等问题，并建立了土的渗透系数与塑性指数的统计关系。In the excavation of foundation pit and foundation bench in shallow aquifer area, the problem of dewatering will be involved. The success or not of the dewatering directly influences the rate of progress and cost of the project, even more on its safety. This deserves to pay high attention. Combining with several concrete projects in Beijing area, the paper discusses the problems such as the influence of different strata combination on the foundation dewatering and the influence of the time spent for the trench excavation to the design arrangement of the dewatering wells etc. Also, the statistical relation of the coefficient of seepage to the plasticity index has been. established.

关 键 词：基坑降水 渗透系数 塑性指数 开槽时间 

分 类 号：TU463[建筑科学—结构工程]