筱溪水电站重力坝坝基锚筋桩加固研究

介绍了岩体锚杆的加固机制，推荐了相应的极限平衡法和有限元法，并将其应用于筱溪重力坝坝基的锚筋桩锚固研究。该坝坝基受顺河向区域性断层影响，河床中部破碎带及影响带宽达180 m。为解决坝基稳定问题，布置了系统的锚筋桩。通过现场试验，证实了坝基锚筋桩锚固的可靠性。通过分析计算，对锚筋桩的倾角、长度、间距等参数进行了设计。在施工工艺方面也作了精心安排。该工程已顺利实施，并于2008年1月开始正常运行。

Rock bolt reinforcement for gravity dam foundation of Xiaoxi hydropower project

The mechanism of the rock bolt is discussed; and the corresponding limit equilibrium method as well as finite element method are recommended. The methods are applied to the study of the rock bolt reinforcement for the gravity dam foundation of Xiaoxi Hydropower Project. This project is influenced by a large regional fault, which causes a cracked zone over 180m in width at the river bed under the dam foundation. The systematic rock bolts are used to improve the stability of the dam foundation. The reliability of the rock bolt reinforcement for the dam foundation is verified by the field test. The calculations using the recommended methods are conducted; based on which the bolting parameters such as the dip angle, the length, and the spacing, are designed. The construction work process is arranged carefully too. The reinforcement has been completed successfully; and the whole project started the normal operation in the January of 2008.