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碎裂结构边坡稳定性受多组相交结构面控制,且受降雨、地震等多因素影响强烈,具有一定的特殊性。本文以某花岗岩碎裂结构边坡为例,在边坡的地质条件和岩体结构研究的基础上,结合施工及监测反馈信息,深入分析了边坡变形破坏模式,并根据稳定性计算结果,提出锚索、钢筋桩与排水相结合的支护方案。研究结果表明:坡体内部陡倾卸荷裂缝发育形成后缘切割面,中下部滑面追踪陡缓两组结构面发展;支护措施实施后,边坡经历“5.12”地震及雨季,多点位移计监测结果表明,地震和降雨对边坡稳定性影响较大,支护措施较好地控制了边坡变形。
The stability of the fractured slope is controlled by multiple sets of intersecting structural planes and is strongly influenced by many factors such as rainfall and earthquake. It has certain particularity. In this paper, taking a granite fractured slope as an example, based on the study of geological conditions and rock mass structure of the slope, combined with the construction and monitoring feedback information, the deformation and failure modes of the slope are analyzed in depth. According to the stability calculation results, Proposed anchor cable, steel piles and drainage combined support program. The results show that: the steep dumping cracks developed in the slope body to form the trailing edge cutting surface, and the steep middle and bottom slip surface tracked the structural plane development of both groups. After the support measures were implemented, the slope experienced “5.12” earthquake and rainy season, Multi-point displacement meter monitoring results show that the earthquake and rainfall have a greater impact on the slope stability, and the support measures well control the slope deformation.