水利工程深基坑排水方案设计与试验

Water Drainage Program Design and Test of Deep Foundation Pit for Hydraulic Engineering

基坑排水是水利工程施工的一个重要组成部分,基坑排水方案选择的好坏将直接影响到工程投资规模和施工能否顺利进行。针对深基坑排水存在地下水易入渗、基坑浸水及地面沉降风险等问题,结合安徽省凤台县永幸河排灌站扩建工程,对水利工程深基坑开挖施工方案进行了设计,充分考虑技术可行、成本较低、施工环境各因素的影响合理选择排水方案,并通过深井降水试验对选取的排水方案进行了验证。结果表明,该排水方案有效地确保了地下水降水质量,达到了良好的使用效果。

Foundation pit drainage is an important component of water conservancy construction. The drainage option will directly affect project investment scale and construction process. Aiming at the problem of groundwater infiltration, inundating and ground settlement risk in deep foundation pit drainage, the excavation and construction program of deep foundation pit is design with the engineering example of irrigation and drainage station in Yongxing River of Fengtai city in Anhui Province. It gives fully consideration of construction environment, technology feasibility and low cost, and the drainage program is selected reasonably. Deep-well water falling test is implemented to verify the selected drainage program. The results show that the drainage program ensures underground water-falling quality effectively and it attains good effect.