某高水头低地应力压力隧洞支护设计与分析  

Design and Analysis of Pressure Tunnel Supporting with High Head and Low Crustal Stress

作　　者：陈晓年 邢建营 吕小龙 CHEN Xiao-nian;XING Jian-ying;LV Xiao-long(YellowRiver Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)

机构地区：[1]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《水电能源科学》2023年第1期104-107,共4页Water Resources and Power

摘　　要：高水头低地应力条件下压力隧洞的安全经济支护一直是水利水电工程中的设计难题,依托厄瓜多尔辛克雷水电站发电引水洞,在挪威准则的框架内,采用钢衬+钢筋混凝土透水衬砌的组合支护型式,构建了考虑地应力影响的钢衬与钢筋混凝土透水衬砌耦合理论模型,以此确定钢衬起点,基于三维渗流场分析,确定高压隧洞钢筋混凝土透水衬砌最佳灌浆深度和压力。通过运行期监测资料分析,工程运行状况良好,表明压力隧洞组合支护各项指标选择是合适的。该研究有效解决了高水头低地应力隧洞安全经济支护难题,保证了压力隧洞结构的安全与稳定。The safe and economic support of pressure tunnel under the condition of high head and low crustal stress has always been a difficult design problem in water conservancy and hydropower projects. Based on the diversion and power generation pressure tunnel of Coca Codo Sinclair hydropower station in Ecuador, the combined support type of steel lining and reinforced concrete permeable lining was adopted within the framework of the Norwegian guidelines. The coupling theoretical model of steel lining and reinforced concrete permeable lining considering the influence of crustal stress was constructed to determine the starting point of steel lining. Based on the three-dimensional seepage field analysis, the optimal grouting depth and pressure of reinforced concrete permeable lining of high-pressure tunnel were determined. The analysis of monitoring data during operation shows that the selection of various indexes of the combined support of the pressure tunnel is appropriate. This study effectively solves the problem of safe and economic support of high head and low crustal stress tunnel, and ensures the safety and stability of pressure tunnel structure.

关 键 词：高水头 低地应力 压力隧洞 支护理论 耦合模型 

分 类 号：TV732.3[水利工程—水利水电工程]