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为研究爆破荷载下岩质边坡结构面参数变化对其稳定性的影响,以西商高速公路为依托,利用原始勘察的平面地形等高线图,采用Midas/GTS岩土数值分析软件,对岩质边坡在施工扰动和爆破动荷载2种工况下进行数值模拟,并分析考虑了覆盖层厚度、基层抗剪强度、岩体重度等结构面参数变化对边坡稳定性的影响,通过查询最危险滑动面的位置、最大位移、最大应力等关键指标,分析了上述参数对上述指标的影响规律。分析结果表明,爆破荷载增加了边坡的滑动力矩,稳定性受覆盖层和岩体重度的影响较其他参数的影响大,在坡脚范围内易发生失稳破坏,使该边坡的稳定性下降,从而使边坡的整体功能不能有效的发挥,应采取加固处理措施。
In order to study the influence of structural parameters of rock slope under blasting load on the stability of the rock slope, based on the Xishang Expressway, the contour map of the original surveyed terrain was used to analyze the stability of the rock with the Midas / GTS geotechnical numerical analysis software. The quality slope is numerically simulated under construction disturbance and dynamic load of blasting. The influence of structural parameters such as cover thickness, base shear strength and rock mass severity on slope stability is analyzed. By means of querying The most dangerous sliding surface position, the maximum displacement, the maximum stress and other key indicators, the above parameters on the impact of the above rules. The analysis results show that the blasting load increases the sliding moment of the slope, the stability is affected by the influence of overburden and rock mass more heavily than other parameters, and the instability damage easily occurs within the range of the slope foot so that the stability of the slope Decline, so that the overall function of the slope can not effectively play, should take reinforcement measures.