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针对某跨海调蓄水库主坝建在弱风化基岩上的特点,为提高地基承载力,减少建筑物的沉降,对主坝基础设计进行了优化。大坝防渗墙底部采用灌注桩基,并节约了桩基处理工程量,同时加强了底板脱空后的处理措施,通过排水管的有效连接减少了扬压力。施工成果表明主坝基础的优化对于减少坝体不均匀沉降起到了重要作用,有效的预防了大坝底板脱空给坝基防渗带来的危害。
Aiming at the characteristics of a main dam of a cross-sea storage reservior on a weakly weathered bedrock, the design of the main dam foundation is optimized to improve the bearing capacity of the foundation and reduce the settlement of the building. At the bottom of the seepage prevention wall of the dam, the pile foundation is filled, and the amount of pile foundation treatment is saved, meanwhile, the treatment measures after the floor is emptied are strengthened, and the uplift pressure is reduced through the effective connection of the drainage pipe. The construction results show that the optimization of the foundation of the main dam plays an important role in reducing the uneven settlement of the dam and effectively preventing the dam floor from seepage caused by the emptying of the dam floor.