摘要
为有效提升边坡-地基灾变控制实效,本文建立了边坡-地基失稳过程模型,设置6个监测线,在堆载过程中坡体水平应变监测、堆载过程中坡体位移监测、水平应变与稳定性的关系、路基灾变过程控制方法四方面,对边坡-地基失稳过程控制进行探析。结果表明,当荷载接近边坡破坏时,理论滑面拉应变值、压应变值均出现剧增现象,且与远离坡面处相比,靠近坡面一侧的水平应变峰值较大。因此可以将应变增量最大值点连线视为滑动面,各监测线水平应变与稳定性相关系数皆在0.9以上。研究得出,水平应变加速度指标分析,能够对边坡—地基的失稳过程进行有效评价和预测。
In order to effectively improve the effectiveness of slope-foundation catastrophe control, a slope-foundation instability process model is presented in this paper, and six monitoring lines are set up to analyze the slope-foundation instability process control in four aspects: slope horizontal strain monitoring during the stacking process, slope displacement monitoring during the stacking process, the relationship between horizontal strain and stability, and subgrade catastrophe process control methods. The results show that when the load is close to the slope failure, the tensile strain value and compressive strain value of the theoretical sliding surface increase dramatically, and the horizontal strain peak value of near the slope surface is larger than that far away from the slope surface. The line of the maximum strain increment can be regarded as the sliding surface. The correlation coefficient between horizontal strain and stability of each monitoring line is above 0.9. The analysis of horizontal strain acceleration index can effectively evaluate and predict the slope-foundation instability process.
作者
黄智文
Huang Zhiwen(Fujian Huasha Energy Design and Research Institute Co.,Ltd.,Fuzhou,350003)
出处
《建设科技》
2022年第17期91-93,97,共4页
Construction Science and Technology
关键词
边坡—地基
失稳过程
水平应变速度
稳定性系数
slope-foundation
instabilityprocess
horizontalstrainvelocity
stabilitycoefficient
