土工格室加固边坡抗冲刷性研究  

Study on erosion resistance of geocell reinforced slope

作　　者：韩宇琨 卢正[1,3] 姚海林[1,3] 刘滨[1] 范永丰 卢强 赵德强 HAN Yukun;LU Zheng;YAO Hailin;LIU Bin;FAN Yongfeng;LU Qiang;ZHAO Deqiang(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Hubei Key Laboratory of Environmental Geotechnology,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;Henan Xinrong Expressway Construction Co.,Ltd.,Luoyang,Henan 471000,China)

机构地区：[1]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,湖北武汉430071 [2]中国科学院大学,北京100049 [3]中国科学院武汉岩土力学研究所环境岩土工程湖北省重点实验室,湖北武汉430071 [4]河南省新融高速公路建设有限公司,河南洛阳471000

出　　处：《岩石力学与工程学报》2021年第S02期3425-3433,共9页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(42077262,42077261,41972294)。

摘　　要：土工格室边坡冲刷防护是一种绿色、经济、高效的防护方式。针对土工格室加固边坡防冲刷效果量化评价和工程应用问题,建立了降雨条件下边坡侵蚀分析模型,并与已有土工格室加固边坡冲刷试验进行对比验证。进一步考虑土工格室与坡面土体相互作用,重点围绕裸坡、仅铺设格室和格室植草3种工况开展研究,揭示了土工格室加固边坡防冲刷机制,全面研究了降雨强度、降雨历时、边坡坡度、边坡坡长、格室尺寸和植草条件等参数对土工格室边坡径流量和土壤流失量的影响,并对土工格室加固边坡防冲刷效果进行了参数敏感性分析。研究结果表明,土工格室能减少20%〜40%的土壤流失量,能有效起到边坡防冲刷的作用;土工格室与植物作用结合后可减少土壤流失量高达90%以上;各参数中,降雨条件和土工格室尺寸对边坡防冲刷效果有着至关重要的影响,边坡参数相对影响较小,研究可为土工格室加固边坡优化设计提供参考。The use of geocell on slope to resist erosion is a green,economical and efficient protection method.Aiming at the problems of quantitative evaluation and engineering application of geocell reinforced slope,an analysis model of slope erosion under rainfall condition is established,and compared with existing geocell reinforced slope erosion test.Considering the interaction between the geocell and the slope soil,the study focuses on three working conditions:bare slope,laying only the geocell and planting grass in the geocell,and the erosion prevention mechanism of geocell reinforced slope is revealed.The effects of rainfall intensity,rainfall duration,slope gradient,slope length,geocell size and grass planting conditions on runoff and soil loss of geocell reinforced slope are comprehensively studied,and the parameter sensitivity analysis is carried out based on the anti-scouring effect of geocell reinforced slope.The research results show that the geocell can reduce the amount of soil loss by 20%-40%,and can effectively play a role in preventing the slope erosion.After combining with the function of plants,the amount of soil loss can be reduced by more than 90%.Among the parameters,rainfall conditions and geocell size have a significant impact on the anti-scouring effect of the slope,while the slope parameters have a relatively small impact.The study can provide reference for the optimization design of slope reinforced by geocell.

关 键 词：土力学 土工格室 降雨:边坡:防冲刷 参数分析 

分 类 号：TU443[建筑科学—岩土工程]