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结合工程实例,总结了在武汉长江一级阶地临江富水水文地质条件下,基坑止隔水帷幕设计和基坑内外降水井布设的经验方式。通过基坑全开挖过程的基坑监测,得出基坑内外降水井的水位变化曲线、基坑周边环境沉降规律,并证明了基坑内外只存在微弱的水力联系,基坑周边环境沉降较小;落底式地下连续墙止隔水帷幕结合坑内抽水、坑外备井是类似地质条件下的有效止降水设计形式。
Combined with the engineering examples, the empirical methods for the design of curtain walls and the layout of dewatering wells inside and outside the foundation pit are summarized under the condition of abundant water and hydrogeology in the first terrace of the Yangtze River in Wuhan. Through the monitoring of the foundation pit in the process of full excavation of the foundation pit, the water level change curve of the inside and outside of the foundation pit and the settlement of the surrounding environment of the foundation pit are obtained. It is also proved that there are only weak hydraulic connections inside and outside the foundation pit, Small; Bottom-bottom diaphragm wall hanging curtains combined with water pumping pit, well outside the pit is similar to the geological conditions of effective design of precipitation.