预进占护底对官地水电站截流难度影响的试验研究  

Experimental Research on Impact of Pre-advanced River Bed Protection on Closure Difficulty of Guandi Hydropower Station

作　　者：贾鸿益 贺昌海[2] 邓锐敏 韩文强 

机构地区：[1]中国水电顾问集团昆明勘测设计院,云南昆明650051 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]四川省港航开发有限责任公司,四川成都610041 [4]中国水电第四工程局,青海西宁810000

出　　处：《云南水电技术》2011年第1期31-34,共4页

摘　　要：官地水电站原先采用宽戗堤截流方案，其截流流量大且龙口底部流速高，龙口河床冲刷严重，不利堤头稳定；后来比较双戗堤截流方案，由于上戗堤水舌的影响，下戗堤堤头坍塌严重，截流也难以实施。为此，提出采用单戗堤预进占护底方案，提高导流洞分流能力和对戗堤附近河床进行保护，从而可降低截流难度。模型试验表明，预进占护底对降低其截流难度作用是明显的。Wide-dike closure was formerly used in Guandi Hydropower Station, but the closure discharge and the bottom velocity were large, the bed of closure gap was scoured seriously, so that the stability of dike was affected.. Later, the double-dike closure scheme was proposed. However, due to the influence of upper dike water jets, the dike head of lower dike collapsed seriously, and it was difficult to implement the closure of this project. Therefore, the single-dike pre-advanced bed protection was proposed to improve the diverting capacity of diversion tunnel and protect the river-bed, so as to lower the difficulty of closure. The model test showed that the bed protection can obviously lower the difficulty of river closure in Guandi Hydropower Station.

关 键 词：官地水电站 施工截流 预进占护底 

分 类 号：TV642.3[水利工程—水利水电工程]