超大跨度泄水隧洞出口洞段及边坡的风控分析与设计  

Risk Control Analysis and Design of the Exit Section and Slope of Super-large Span Spillway

作　　者：张凤财 周正军 王观琪 李永红 ZHANG Fengcai;ZHOU Zhengjun;WANG Guanqi;LI Yonghong(PowerChina Chengdu Engineering Corporation Limited,Chengdu Sichuan 610072)

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《四川水力发电》2024年第5期140-143,共4页Sichuan Hydropower

摘　　要：基于双江口水电站洞式溢洪道出口洞段及边坡的复杂工程地质条件、施工条件、环水保制约因素,通过施工勘察、危岩体风险分析与评价,借助边坡稳定分析、有限元计算等手段,开展治理方案技术经济比较。计算分析成果及实施情况表明,洞室晚出洞,边坡“少开挖、强支护”,危岩体大面防护治理结合关键部位锁口、拦腰、固脚措施,出口洞段与边坡危岩体“分而治之”的系统治理方案是合理可行的,满足工程进度要求的情况下降低了施工难度及风险,节约了工程投资成本,可供类似工程借鉴。Based on the complex engineering geological conditions,construction conditions,and environmental and water conservation constraints of the outlet section and slope of the spillway at Shuangjiangkou Hydropower Project,a technical and economic comparison of the treatment plans was carried out through construction survey,risk analysis and evaluation of dangerous rock mass,slope stability analysis,finite element calculation,and other means.The results of calculation and analysis,as well as the implementation situation,indicate that the comprehensive treatment measures including the late exit of the tunnel results in"less excavation and stronger support"for the slope,the combination of large-scale protection and treatment of the dangerous rock mass with key measures such as locking the mouth,blocking the waist,and fixing the feet,and the"divide and rule"of the exit tunnel section and the dangerous rock mass of the slope,is reasonable and feasible.While meeting the requirements of the project schedule,it reduces the difficulty and risk of construction,saves project investment,and can be used as a reference for similar projects.

关 键 词：溢洪道 施工勘察 有限元 危岩体 风险分析评价 

分 类 号：TV651.1[水利工程—水利水电工程] O242.21[理学—计算数学]