填方路堤水毁滑坡机理及加固措施比选研究  

Mechanism of Water‑Damaged Landslides of Embankments and Comparison of Reinforcement Measures

作　　者：胡明华 张百永 许魁[1,2] HU Minghua;ZHANG Baiyong;XU Kui(Anhui Transport Consulting&Design Institute Co.,Ltd.,Hefei,Anhui 230088,China;Highway Traffic Energy Saving and Environmental Protection Technology Transportation Industry R&D Center,Hefei,Anhui 230088,China)

机构地区：[1]安徽省交通规划设计研究总院股份有限公司,安徽合肥230088 [2]公路交通节能环保技术交通运输行业研发中心,安徽合肥230088

出　　处：《中外公路》2024年第3期26-34,共9页Journal of China & Foreign Highway

基　　金：国家重点实验室开放基金资助项目(编号:SKLMRDPC21KF13)。

摘　　要：路堤水毁病害严重影响公路正常运行,确保路堤的稳定极其重要,故开展填方路堤水毁滑坡机理分析及安全控制措施研究非常必要。该文以某高速公路路基填方路段为例,通过现场变形监测及稳定性计算,定性分析滑坡原因及形成机理,计算不同加固方案的稳定性系数,并考虑工程造价、施工工艺及施工周期等因素,推荐适宜的加固方案。结果表明:受持续强降雨影响,路堤地层不均匀沉降是造成滑塌的根本原因;因路堤左侧现存洼地,降雨汇集并渗入土层,使黏土层膨胀软化及排水通道堵塞,进一步加快滑坡的形成;采用钢管桩与回填反压的复合加固方案,其稳定性满足要求,现场监测表明加固效果良好。Water damage to embankments seriously affects the normal operation of highways,so it is extremely important to ensure the stability of the embankment.In addition,it is necessary to analyze the mechanism and study the safety control measures for water-damaged landslides of the embankment.A highway subgrade embankment was studied,and the causes and formation mechanism of the landslide were qualitatively analyzed based on the on-site deformation monitoring and stability calculation.Then,the stability coefficients of different reinforcement schemes were calculated.An appropriate reinforcement scheme was recommended by considering the project cost,construction technology,and construction period.The results indicate that uneven settlement of the embankment stratum is the fundamental cause of landslides under the influence of continuous rainfall.As rainfall accumulates in the depression on the left side of the embankment and penetrates into the soil layer,swelling and softening of clay layers and blockage of drainage channels further accelerate the formation of landslides.The composite reinforcement scheme of steel pipe piles and backfill back pressure meets the stability requirements,and the reinforcement effect is good.

关 键 词：路堤边坡 水毁滑坡 稳定性分析 加固措施 方案比选 

分 类 号：U416.1[交通运输工程—道路与铁道工程]