摘要
针对白马航电枢纽采用混凝土重力坝,两岸坝肩分布有岩溶角砾岩,其粒径大小不一,基本呈散粒状、较疏松,且夹有泥质条纹条带,开挖后形成的高陡边坡存在变形稳定问题。本文根据边坡及坝基稳定性分析的需要,对岩溶角砾岩开展了岩体变形试验、直剪强度试验、三轴压缩试验和物理性质试验等一系列的工程岩体试验研究,取得了一系列较完整的试验成果。在此基础上结合工程地质情况,采用工程地质类比法提出了该电站的岩溶角砾岩力学参数试验建议值:变形模量0.05~0.25 GPa,弹性模量0.25~0.50 GPa,抗剪断强度f′为0.4~0.6,c′为0.08~0.3 MPa,抗剪强度f为0.35~0.45。
A concrete gravity dam is used in the Baima navigation power junction, where karst breccia is present in the dam abutment. They are different in size, with a loose state and mud strips, thus giving rise to problems concerning deformation and stability in a high steep slope after excavation. According to the requirements of slope and dam foundation stability analysis, a series of engineering rock mass tests was conducted, including a rock mass deformation test, direct shear strength test, triaxial compression test, and physical property test. A series of complete test results was obtained. On this basis, in combination with the engineering geological condition, the following recommended values of karst breccia mechanics parameters were proposed by the engineering geologic analogy method: deformation modulus is 0.05~0.25 GPa, elastic modulus is 0.25~0.50 GPa, shear strength f′ is 0.4~0.6, c′ is 0.08~0.3 MPa, f is 0.35~0.45.
作者
郭喜峰
吴相超
熊诗湖
GUO Xifeng;WU Xiangchao;XIONG Shihu(Changjiang River Scientific Research Institute Chongqing Branch,Chongqing 400026,China;Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan 430010,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2022年第10期1447-1453,共7页
Journal of Harbin Engineering University
基金
国家重点研发计划(2016YFC0401801)。
关键词
白马航电枢纽
岩溶角砾岩
变形特性
强度特性
物理性质
变形试验
直剪试验
三轴试验
力学参数
Baima navigation-power junction
karst breccia
deformation characteristics
strength characteristics
physical property
deformation test
direct shear test
triaxial test
mechanical parameter
作者简介
通信作者:郭喜峰,男,高级工程师,博士,E-mail:xifeng1984@126.com.
