吉牛水电站工程优化设计

Optimization design of Jiniu Hydropower Station

吉牛水电站工程位于四川省甘孜州丹巴县革什扎河干流上,工程主要由首部枢纽、引水枢纽和厂房枢纽组成。招标阶段,首部枢纽基础采用振冲碎石桩进行加固处理,施工阶段根据生产性试验和计算校核后,对桩间距进行了调整。引水隧洞进行岩石物理力学试验后,根据试验成果及开挖揭露的地质条件,对隧洞的衬砌结构和初砌钢筋进行了优化。厂房枢纽通过施工试验,将地基处理直接由振冲法调整为先冲击造孔,再振冲处理。

Jiniu Hydropower Station is located on Geshizha River in Danba County of Sichuan Province and consists of dam, water diversion structure and powerhouse. In the bidding stage, the dam foundation was planned to be reinforced by vibro-re-placement gravel pile and in the construction stage, after productive test and calculation recheck, the pile spacing was adjusted. For the water diversion tunnel, the rock mechanics test was conducted and according to the test results and the geological condi-tion exposed by excavation, the lining structure and lining steel were optimized. For the foundation treatment of powerhouse, by the construction test, the direct vibro-flotation method was changed to hole drilling and vibro-flotation treatment.