边坡坡面浅层加固稳定性分析及设计参数探讨

发布时间：2018-01-15 14:14

本文关键词：边坡坡面浅层加固稳定性分析及设计参数探讨　出处：《长江科学院院报》2017年11期 　论文类型：期刊论文

【摘要】：基于有限差分的强度折减法,探讨坡面浅层土体加固边坡的稳定性,并针对地基与边坡土质相同和采用岩石地基2种工况,综合分析边坡加固区宽度和土体黏聚力、加固区进入地基土深度和边坡几何参数等因素对稳定性和滑动面的影响。结果表明:当地基与边坡土质相同时,不同加固宽度下边坡安全系数随加固区土体黏聚力增加均呈先减少后增加的趋势,且当土体黏聚力达到临界值时安全系数趋于稳定;随着加固区土体黏聚力的增大,边坡由浅层滑动变成深层滑动并最终完全不通过加固区,通过将加固区适当深入地基土可以提高边坡安全系数;当采用岩石地基时,随加固区土体黏聚力增加,安全系数总体上呈现先减少后近似线性增加,相同几何尺寸和土质条件下边坡安全系数比地基与边坡土质相同时整体上提高了0.5~1倍,加固区土体黏聚力越大即抗剪强度越高时,边坡安全系数越高。
[Abstract]:Strength reduction method based on finite difference, stability of slope shallow soil slope reinforcement, and the foundation and slope soil and rock foundation by the same 2 conditions, cohesive zone width and the soil reinforcement slope reinforcement effect analysis, soil depth and slope area into the geometrical parameters on the stability and the sliding surface. The results show that when the soil foundation and slope and slope safety coefficient under different reinforcement width with soil cohesion increases were decreased and then increased, and when the soil cohesion reaches the critical value of safety coefficient tends to be stable; with the increase of the cohesion of the soil, the slope by the shallow slide into the deep slide and eventually completely through the reinforced area, the appropriate depth of foundation soil reinforcement area can improve the safety coefficient of slope; when the rock foundation, with the soil cohesion The force increase, overall safety coefficient decreases and then increases linearly, the slope safety coefficient the same geometric size and soil conditions than the soil foundation and slope are the same overall increased 0.5~1 times, the cohesion of the greater the higher the shear strength of the soil, Bian Poan coefficient is high.

【作者单位】：河北工业大学土木与交通学院;河北工业大学河北省土木工程技术研究中心;
【基金】：河北省自然基金项目(E2014202038)
【分类号】：TU43;TU472
【正文快照】： 1研究背景稳定性分析是岩土边坡设计中的重点问题,当前常用的求解方法主要有3种:(1)极限平衡法,如Bishop[1]和瑞典条分法[2],通过引入大量假定将问题转化为静定问题求解,从而降低了理论推导的严谨性和适用范围;(2)极限分析法,基于极限分析的上、下限定理计算边坡稳定性,如Dona

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