基于有限元法的凤凰颈泵站深基坑度汛方案优化研究  

Optimization Study of Flood-Safe Scheme for Deep Excavation of Phoenix Neck Pump Station Based on Finite Element Method

作　　者：余跃程 Yu Yuecheng(Anhui Provincial Water Conservancy&Hydropower Investigation,Design and Research Institute Co.,Ltd.,Hefei 230088,Anhui)

机构地区：[1]安徽省水利水电勘测设计研究总院股份有限公司,安徽合肥230088

出　　处：《陕西水利》2024年第12期138-141,145,共5页Shaanxi Water Resources

摘　　要：以引江济淮工程凤凰颈泵站深基坑为研究对象,根据工程现场进度及基坑度汛的实际需求,针对沿江粉细砂地层深基坑度汛方案,开展在长江汛期水位下,不同截渗墙深度及基坑内不同蓄水水位条件下的三维渗流分析,获得不同方案下基坑周围土体的水头以及监测点的垂直渗透比降,结合汛期基坑开挖深度,判断基坑能否安全度汛。最后,根据研究结果,比选出最优的度汛方案,确保基坑能够安全度汛。Taking the deep excavation of the Phoenix Neck Pump Station of the Diverting Yangtze River to Huai River Project as the research object,according to the progress of the construction site and the actual needs for safe passage through the flood season,this study focuses on the flood-safe scheme for deep excavations in fine sandy soil layers along the river.It conducts three-dimensional seepage flow analysis under different conditions of cutoff wall depths and varying water levels within the excavation during the Yangtze River flood season.The study obtains the hydraulic heads around the excavation and the vertical permeability gradients at monitoring points under different schemes.Combined with the depth of excavation during the flood season,it assesses whether the excavation can safely pass through the flood period.Finally,based on the research findings,the optimal flood-safe scheme is selected to ensure the safe passage of the excavation through the flood season.

关 键 词：深基坑 度汛方案 三维渗流 渗透比降 

分 类 号：TV551.4[水利工程—水利水电工程]