(1. State Key Laboratory of Hydraulics and Mountain River Engineering，Sichuan University，Chengdu，Sichuan 610065，China；
2. SinoHydro Bureau 7 Co.，Ltd.，SinoHydro Group Ltd.，Chengdu，Sichuan 611730，China；
3. College of Architecture and Environment，Sichuan University，Chengdu，Sichuan 610065，China)
Abstract：The broken rock masses with poor mechanical and permeability properties in fault f2 at Jinping I hydropower station have an adverse effect on the bearing capacity of foundation；and cement-chemical compound technology was used to reinforce it in the engineering practice. Through the wave velocity，deformation modulus in hole and physico-mechanical test in laboratory，the major indexes such as porosity，compressive and shear strengths have been deeply studied. Furthermore，the scanning electron microscope(SEM) was adopted to analyze the microstructure and the filling situation of rock after grouting. Experimental results show that wave velocity and shear strength of rock mass in fault are increased obviously and meet the requirement of design；microcracks in rock are well filled by chemical material；and the minimum crack is only 0.01 mm. The cement-chemical compound grouting technology can improve the integrity and mechanical properties of the rock mass in fault zone；and it is an effective method to reinforce weak structural plane in rock masses.
宋胜武，冯学敏，向柏宇，等. 西南高陡岩石边坡工程关键技术研究[J]. 岩石力学与工程学报，2011，30(1)：1-22.(SONG Shengwu，FENG Xuemin，XIANG Baiyu，et al. Research on key technologies for high and steep rock slopes of hydropower engineering in southwest China[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(1)：1-22.(in Chinese))
2013, Vol. 32 
