摘要
云南万家口子水电站工程高压引水隧洞最大静水头154.55m,洞身走线中间处有一断层出露。隧洞开挖过程中,在外水压力作用下,洞室围岩存在涌水和渗透破坏,部分洞段小断层及岩溶发育。针对不同围岩段和衬砌方式,合理选择灌浆工艺、灌浆参数,有效提高围岩抗劈裂强度和防渗性能,解决地质缺陷问题。
High pressure headrace tunnel of Wanjiakouzi Hydropower Station in Yunnan,which maximum stat- ic head is 154.55m,and at the center of the hole body go line where is a fault exposed.In the process of tunnel excavation which in the external water pressure,presence of water gushing and surrounding rock permeability damage,in some areas, small faults and karsts development.According to different surrounding rock and lining, choose the grouting process and grouting parameters, so as to improve the splitting strength and anti-seepage performance of the surrounding rock effectively, and solve the problem of geological defects.
出处
《吉林水利》
2017年第3期8-11,共4页
Jilin Water Resources
关键词
高压隧洞
回填灌浆
固结灌浆
接触灌浆
high pressure tunnel
backfill grouting
consolidation grouting
contact grouting
