CAJ | 학술논문

猴子岩水电站厂区处于高-极高地应力区。其电站尾水调压室目前已开挖至中部，现场巡视发现尾调室上游拱肩出现了沿尾调室轴线方向扩展的混凝土喷层裂缝，而1号尾调室端墙和上游边墙则出现了高地应力条件下的岩体剥落、片帮现象。从监测资料和地质资料入手，通过与其他类似工程对比，并结合数值模拟计算和力学分析，指出产生上述破坏的原因主要是地应力偏压导致拱肩应力集中和边墙的水平卸荷与竖向加载所致。依据研究结论对现有支护强度进行了评价，并提出了以提高围压为目的的增加预应力锚索的加固措施。
후자암수전참엄구처우고-겁고지응력구。기전참미수조압실목전이개알지중부，현장순시발현미조실상유공견출현료연미조실축선방향확전적혼응토분층렬봉，이1호미조실단장화상유변장칙출현료고지응력조건하적암체박락、편방현상。종감측자료화지질자료입수，통과여기타유사공정대비，병결합수치모의계산화역학분석，지출산생상술파배적원인주요시지응력편압도치공견응력집중화변장적수평사하여수향가재소치。의거연구결론대현유지호강도진행료평개，병제출료이제고위압위목적적증가예응력묘색적가고조시。
The underground powerhouse of Houziyan Hydropower Station is located in gorge area with high to extremely-high ground stress. At present, the excavation of surge chamber is going to the middle part and some damage phenomena emerge, in-cluding cracks of spraying concrete on the upstream spandrel along the cavern axis, and the splitting failure of surrounding rock on side and end walls. According to the monitoring data and geological data as well as analogical comparison, while combing with the numerical simulation and mechanical analysis, we point out the damages are caused respectively by: stress concentration on spandrel induced by eccentric compression of ground stress, and horizontal unloading and vertical loading of side wall. According to the analysis results, the current support intensity is evaluated and an adaptive reinforcement measure that increases anchor ca-bles to gain confining pressure is proposed.