Abstract:As a key hub of the Jiaodong Water Diversion Project, Wangdao Pumping Station in the Comprehensive Flood Control Project of Xiaoqing River features foundation stability that directly determines the flood control and water diversion functions. Aiming at complex geological conditions, insufficient bearing capacity and high permeability of the pumping station site, the cement and soil mixing pile composite foundation technology is adopted. Through analysis on pile design, layout and deep construction technology, together with supporting measures for anti-seepage, bearing capacity and stability guarantee, the foundation strength and overall stability are guaranteed. Furthermore, the static load tests for composite foundation and vertical compressive tests for single pile verify that bearing capacity, settlement control and anti-seepage performance all meet specification requirements. The research results provide technical references and practical experience for similar water projects.