开挖前地下连续墙接缝声纳渗流检测施工技术

Construction Technology of the Sonar Detection for Diaphragm Wall Joints Before Excavation

开挖前地下连续墙声纳渗流检测是在地下隐蔽工程中,土方开挖施工前,进行人工抽水试验流场条件下,测量地下连续墙接缝处渗流场的流速、流向、流量与渗透系数在地下连续墙上的三维坐标分布,判别地下连续墙的施工质量与地下水渗流场的对应关系。从而定量、定位找到那些造成基坑开挖过程中,可能出现的重大隐患部位,使之在基坑开挖前进行封堵,为建筑基坑的顺利开挖,提供原位的水文地质参数支持。

The sonar detection of diaphragm wall is used in underground concealed work and before the earthwork excavation construction. the of diaphragm wall construction quality and the corresponding relation of groundwater seepage field is identified,through the pumping test of flow velocity,flow direction,flow with permeability coefficient in the 3d coordinate distribution on diaphragm wall artificial flow field under. Find those caused in the process of excavation and quantitatiue positioning,possible hazard area,before the excavation to block,for the construction of foundation pit exeavation,provide the hydrogeological parameters of in situ.