乌东德水电站导流洞不良地质段支护时机研究  

On the Support Timing of the Diversion Tunnel Section with Unfavorable Geologic Conditions in Wudongde Hydropower Station

作　　者：姚品品[1] 郎九莉 李华 陈东方[3] YAO Pinpin;LANG Jiuli;LI Hua;CHEN Dongfang(China Three Gorges Corporation,Kunming 651500,China;Sinohydro Bureau 6 Co.,Ltd.,Shenyang 110179,China;Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China)

机构地区：[1]中国长江三峡集团公司,云南昆明651500 [2]中国水利水电第六工程局有限公司,辽宁沈阳110179 [3]东北大学深部金属矿山安全开采教育部重点实验室,辽宁沈阳110819

出　　处：《水电与新能源》2018年第4期26-30,共5页Hydropower and New Energy

摘　　要：以乌东德水电站导流洞不良地质段为研究对象,基于收敛约束法原理,在确保围岩与支护结构均不被破坏的前提下,通过围岩特性曲线和支护结构特性曲线确定了围岩与支护结构共同承载隧洞开挖卸荷产生的围岩压力的最佳时机。收敛约束法在薄层及极薄层岩体隧洞开挖过程中的应用,为安全高效的施工提供了参考依据。In the construction of the diversion tunnel in Wudongde Hydropower Station,unfavorable geologic conditions are encountered in a tunnel section.By using the convergence-confinement method,the ground reaction curve and the support characteristic curve are obtained.Then,the optimal support timing of this tunnel section is determined,at which the surrounding rock and the support structure are of no damage and share the surrounding rock pressure induced by the excavation unloading.The application of the convergence-confinement method in tunnel excavation case with thin and extremely thin rock mass provides useful reference for the safe and effective tunnel construction.

关 键 词：支护时机 收敛约束法 薄层岩体 导流洞 乌东德水电站 

分 类 号：TV551.12[水利工程—水利水电工程]