淤泥质土堤防边坡稳定性硬壳层作用效应分析  

Analysis for Effect of Hard Shell Layer on Slope Stability of Mucky Soil Levee

作　　者：何利超 陆旭旭 赵新铭 姜波 潘建伍 He Lichao;Lu Xuxu;Zhao Xinming;Jiang Bo;Pan Jianwu(Power China Municipal Construction Group Shandong Engineering Co.,Ltd.,Jinan Shandong 250000,China;School of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu211106,China)

机构地区：[1]中国电建市政集团山东工程有限公司,山东济南250000 [2]南京航空航天大学民航学院,江苏南京211106

出　　处：《港工技术》2022年第5期30-35,58,共7页Port Engineering Technology

基　　金：中国电力建设股份有限公司科技项目(DJ-ZDXM-2015-12),国家重点研发计划重点专项资助项目(2020YFC1511900)。

摘　　要：为了提高工程进度并保证工程质量,进行了室内土工试验和数值试验研究。依据有限元强度折减理论,提出可用于离散元PFC的细观强度折减法,并分析了堤防边坡的稳定特性,得到了边坡的安全系数。根据工程分层填筑的施工特点,提出了土体复合硬壳层的假设,研究了硬壳层厚度、强度和层数等因素对边坡稳定性和变形特性的影响,硬壳层对提高边坡稳定、改善边坡变形有着重要作用。最后研究了硬壳层对控制边坡坡度的作用,若能形成有效的硬壳层骨架,则能适当提高边坡的坡度,具有一定的工程和经济意义。In order to improve project progress and ensure project quality,a laboratory geotechnical test and numerical research are carried out.Based on finite element strength reduction theory,a meso-strength reduction method is proposed,which applies to discrete element PFC.Safety factor is obtained by analyzing the stability characteristics of levee slope.According to the characteristics of layered filling construction,composite hard shell layer is assumed,including the influence on slope stability and deformation by the thickness,strength and number of hard shell layers.The hard shell layers play an important role in improving slope stability and deformation.Finally,the effect of hard shell layer on slope gradient is studied.It is concluded that effective hard shell framework can raise the slope to an appropriate gradient,which has a certain engineering and economic significance.

关 键 词：岩土工程 PFC 细观强度折减法 硬壳层 边坡稳定 

分 类 号：TU44[建筑科学—岩土工程]