摘要
锦屏一级水电站左岸人工岩质高边坡地质条件十分复杂,施工难度大,边坡岩体稳定性关系到整个水电站的安全建设和运行。利用高边坡典型剖面位移监测成果,对高边坡浅层及深层岩体变形规律进行综合研究,分析影响边坡变形的多种因素,结果表明,施工开挖因素对边坡变形影响显著。随着左岸边坡的开挖爆破施工,边坡高度逐渐增大,边坡边界条件发生变化,边坡水平地应力向临空面的逐步释放,使得边坡岩体向临空面变形。另外,时效因素对边坡的变形也有较大影响。但随着边坡锚固措施的实施,岩体深层变形得以控制,变形趋于平缓,目前边坡整体是稳定的。
Because of the complex geological conditions and construction difficulty, the stability of the left bank steep slope of the Jinping- Ⅰ Hydropower Station is closely related to the safety of the station. Based on the deformation monitoring results of a typical slope section, the regularity of deformation of shallow and deep rock bodies and the factors affecting the deformation of the slope are analyzed. The results indicate that excavation effect is notable. The height of the slope increases gradually and the boundary conditions change with blasting excavation, so the horizontal stress is released to the slope free-face and the rock deformation inclines to it. In addition, time-effect brings about great effect to the slope deformation. However, after the anchoring measures are taken, the deformation of deep rock is controlled and becomes smooth, and the slope as a whole is stable.
出处
《水电自动化与大坝监测》
2008年第3期64-67,共4页
HYDROPOWER AUTOMATION AND DAM MONITORING
关键词
水电站
高边坡
变形监测
变形规律
多点位移计
hydropower station
steep slope
deformation monitoring
deformation regularity
multi-point displacement meter
