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文章根据固体力学连续介质变形的理论和利用显式有限差分技术,研究预应力锚索联合钢管桩共同工作的边坡稳定性有限差分强度折减分析法和结构内力分布研究。将此理论和技术应用于贵阳市绕城公路K16+790～K16+860段典型路基边坡滑坡工程应急抢险治理,研究钢管桩协同预应力锚索加固措施后的变形和稳定性,结果表明这些加固措施对边坡的稳定有重要作用,分析了单独使用钢管桩和协同预应力锚索的稳定性。模拟结果表明:单独使用微型钢管桩加固措施,其提高整体稳定性的效果不是十分明显,所以建议应与其他的加固措施一起使用;预应力锚索加多排钢管桩联合挡土结构物,预应力的施加将改变钢管桩的受力状态,从弯矩图中,可以看出弯矩明显的改变,其受力状态改变是相对复杂的过程。
Based on the theory of continuous medium deformation of solid mechanics and using explicit finite difference technique, this paper studies the finite difference strength reduction analysis of slope stability and the study of the internal force distribution of the structure in which the prestressed anchor cable and the steel pipe pile work together. This theory and technique are applied to the emergency rescue and treatment of the typical roadbed landslide at the K16 +790 ~ K16 + 860 beltway of Guiyang Ring Road. The deformation and stability of the steel pipe pile after the prestressed anchorage reinforcement are studied. The results show that These reinforcement measures play an important role in slope stability. The stability of steel pipe piles and prestressed anchor cables is analyzed. The simulation results show that the effect of improving the overall stability of the single steel pipe pile reinforcement is not obvious, so it is suggested that it should be used together with other reinforcement measures. Prestressed anchor cable plus multi-row steel pipe pile combined with retaining structure The application of prestress will change the stress state of steel pipe pile. From the moment diagram, it can be seen that the bending moment changes obviously, and the change of its stress state is a relatively complicated process.