深基坑降水设计中几个问题的讨论

针对目前深基坑降水设计中存在的几个问题 ,结合润扬长江公路大桥锚碇基坑、南京地铁明挖基坑和南京某大楼基坑工程 ,对井群布设与单井结构、帷幕与降水井组合和降水—沉降计算模式等问题进行了讨论、分析。指出了基坑降水设计、计算中存在的一些误区 ,强调应充分重视基坑场地的自然地质、水文地质条件和含水层的水文地质结构特点。提出了解决深基坑降水设计、计算中几个具体问题的原理和方法。

Study on some Problems about Deep Foundation Pit Dewatering Design

Aiming at some problems presently existed in deep foundation pit dewatering design, combined with anchor foundation pit of Runyang Yangtze River highway bridge, shallow spread foundation pit of Nanjing subway and foundation pit engineering of Nanjing someone building, some issues involved in optimal design of well group and single structure, combination between curtain and dewatering well, calculation pattern between dewatering and settlement are discussed and analyzed in the paper. Furthermore, some misconceptions in foundation pit dewatering design and calculation are pointed out. It emphasizes that one should sufficiently attach importance to natural geological and hydrogeological conditions and hydrogeological structures of aquifer in foundation pit fields. As a result, theory and methods of several problems in dealing with foundation pit dewatering design and calculation are put forward.