基于强度折减法的顺层岩质边坡稳定性与锚杆加固分析  

Analysis of Layered Rock Slope Stability and Reinforcement with Anchor Bolts Based on the Strength Reduction Method

作　　者：张宇君 黄金豪 周瀚威 ZHANG Yujun;HUANG Jinhao;ZHOU Hanwei(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou Jiangsu 215004,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215004

出　　处：《江苏建筑》2024年第6期96-100,共5页Jiangsu Construction

摘　　要：边坡稳定性分析向来都是岩土工程领域的重要课题,而含软弱夹层的顺层岩质边坡相较于其它构造的边坡稳定性更差,容易发生滑坡灾害。文章以有限元强度折减法对含软弱层的顺层岩质边坡进行了边坡形变与稳定性分析,并探讨了不同加固方案对于边坡稳定性与边坡形变的影响。结果表明,软弱层的强度与边坡整体稳定性高度相关,软弱层所形成的塑性带贯通至坡顶后滑坡便开始发生。在边坡加固方面,对不同位置的锚杆加固方案进行对比分析,发现坡脚位置的加固对于边坡稳定性的提升与坡体变形的抑制效果最好,对于顺层岩质边坡的加固应首先考虑从坡脚开始。在穿过潜在滑移面的锚杆总横截面积适当的情况下,可使边坡在失稳前产生足够大的位移,为边坡灾害的预警提供条件。该研究为含软弱夹层的顺层岩质边坡稳定性分析及其加固方案的优化设计提供了参考。Slope stability analysis is always an important topic in the field of geotechnical engineering.The bedding rock slope with weak interlayers is more unstable than other structures and is prone to landslide disasters.In this paper,the deformation and stability of bedding rock slope with weak interlayers are analyzed by the finite element strength reduction method,and the influence of different reinforcement schemes on slope stability and slope deformation is studied.The results show that the strength of the weak interlayers is highly related to the slope stability,and landslides occur when the plastic zone formed by the weak layer penetrates through to the slope top.In terms of slope reinforcement,the comparative analysis of bolt reinforcement schemes in different positions shows that the reinforcement of the slope toe has the greatest effect on slope stability,and the reinforcement of bedding rock slope should first be considered from the slope foot.Under the condition that the total cross-sectional area of bolts passing through the potential slip plane is appropriate,the slope can produce enough displacement before instability,which provides conditions for the early warning of slope disasters.This study provides a reference for the stability analysis of bedding rock slopes with weak interlayers and the optimal design of reinforcement schemes.

关 键 词：边坡稳定性 有限元强度折减法 软弱层 顺层岩质边坡 加固方案 

分 类 号：TU457[建筑科学—岩土工程]