基于相似材料试验的节理边坡稳定性分析

节理岩质边坡通常是由节理岩块及完整岩块构成的复杂地质体,其稳定性受到节理产状特点与边坡开挖卸荷作用共同影响,因此节理边坡稳定性分析一直是岩土力学的研究热点。本文结合袁家村铁矿边坡的复杂节理条件,设计了相似材料试验,通过材料制备、节理预制、开挖模拟等试验环节再现边坡开挖卸荷破坏过程,并借助XTDP摄影测量系统对边坡进行位移监测,获得了顺层节理边坡开挖过程中变形、破坏以及最终滑移的全过程。根据试验结果明确了袁家村铁矿复杂多节理边坡在开挖过程中的节理开裂深度与滑移范围,为后期的边坡加固与防滑治灾提供了理论依据。

The Stability Analysis of Jointed Slope Based on Similar Material Test

The jointed rock slope is usually a complex geological body composed of joints and intact rock blocks, and its stability is affected by joint occurrence and slope excavation unloading. Therefore, the stability analysis of the jointed rock slope is the research hotspot of geotechnical mechanics. According to the complicated joint condition of the slope in Yuanjiacun iron mine, the experiment of similar material is designed. In this paper, the unloading failure process of slope excavation is reproduced through the test links of material preparation, joint prefabrication and excavation simulation, and the displacement of slope is monitored by XTDP photogrammetry system Eventually, the whole process of deformation, failure and final sliding of bedding jointed slope during excavation is obtained. According to the test results, the crack depth and slip range of the complex multi-joint slope in Yuanjiacun iron mine during excavation are clarified, which provides a theoretical basis for the reinforcement and anti-slip disaster treatment of the slope in the later stage.