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以距2008年攀枝花6.1级地震震中约9.7 km的攀田高速公路望江岭隧道田房端出口斜坡堆积体为研究对象,在连续的现场测斜监测数据的基础上,探讨了地震前、后斜坡堆积体的变形特性及其随时间的演进规律。结果表明:各测孔同震顺坡向位移最大值为26~28 mm,并沿深度近似呈逐渐减小分布;J3、J5测孔附近岩土体时效变形于震后约300 d达到峰值,而后逐渐稳定;至震后约430 d,由于坡体内、外界综合因素影响,J1孔顺坡向位移仍处于调整状态。综合现场监测成果,可以认为,在经历了大约1 a的自适应调整,特别是经2009年雨季后,斜坡堆积体已处于整体稳定状态。
Based on the continuous on-site monitoring data of inclined slope at the Tianjianling exit of Tianjianling tunnel at Panzhihua Expressway, which is about 9.7 km away from the Panzhihua 6.1 earthquake in 2008, Deformation Characteristics of Slope Piles and Its Evolution with Time. The results show that the maximum value of the coseismic and lateral displacement of each hole is 26 ~ 28 mm, and decreases gradually along the depth. The time-dependent deformation of rock mass around J3 and J5 peak reaches about 300 d after the earthquake, and then gradually increases Stable; about 430 d after the earthquake, due to the comprehensive factors inside and outside the slope, J1 hole along the slope of the displacement is still in adjustment. Based on the monitoring results of the on-site monitoring, it can be considered that after about 1 year of adaptive adjustment, especially after the rainy season in 2009, the slope accumulation body has been in an overall stable state.