某高速公路边坡滑坍加固方案研究  

Slope Stabilization Methods for an Unstable Slope in an Expressway

作　　者：蔡跃伟 何海东 CAI Yuewei;HE Haidong(Yunnan ChuxiongDali Expressway Investment and Development Co.Ltd.,Dali 671000;Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071)

机构地区：[1]云南楚大高速公路投资开发有限公司,云南大理671000 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071

出　　处：《土工基础》2024年第4期635-639,645,共6页Soil Engineering and Foundation

摘　　要：高速公路沿线的高陡边坡在降雨、地震等多因素作用下易发生滑坍等突发灾害,如何快速提供加固方案以降低效益损失至关重要。以云南省某高速公路边坡滑坍灾害处置为例,通过地质勘察、室内试验等确定边坡潜在滑面与岩土体参数。以公路边坡安全控制标准建立适用于工程实践的三种工况并确定稳定性判定标准,提出“预应力锚索加固”与“预应力锚索+板桩墙联合加固”两套方案,根据规范要求的边坡安全系数,基于极限平衡法进行方案设计并验证在采用上述两套方案条件下该边坡将保持稳定。研究成果可为类似边坡滑坍的加固方案设计提供参考。The high and steep slopes along highways are prone to have a sudden hazard such as landslides under the influence of multiple factors as heavy rainfalls and earthquakes.It is crucial to quickly provide the mitigation plans to reduce economic and property losses.This article selects the landslide hazard of a highway slope in Yunnan Province as the case history.The potential sliding surface of the slope and the mechanical parameters of the rock and soil through geological surveys and laboratory tests are determined.Based on the highway slope safety control standard,three working conditions for the engineering practice are established and the stability standard is determined.Two methods are proposed:“prestressed ground anchor reinforcement”and“prestressed ground anchor plus the sheet pile wall combine mitigation”.Based on the required slope safety factor in the specifications,the corresponding design is carried out by using the limit equilibrium method and verified that the slope will remain stable under the above two methods.The results provide a reference for the design and mitigation methods for similar projects.

关 键 词：高陡边坡 滑坍加固 极限平衡法 预应力锚索 板桩墙 

分 类 号：P642[天文地球—工程地质学]