悬臂式挡墙在高速拼宽路基中的应用及分析  

Application and analysis of cantilever retaining wall in expressway widened subgrade

作　　者：刘长伟 彭荟茹 Liu Changwei;Peng Huiru(Guizhou Transportation Planning Survey&Design Academe Co.,Ltd.,Guiyang 550000,China;Yunnan Yunling Expressway Engineering Consulting Co.,Ltd.,Kunming 650000,China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵州贵阳550000 [2]云南云岭高速公路工程咨询有限公司,云南昆明650000

出　　处：《山西建筑》2023年第11期123-126,共4页Shanxi Architecture

摘　　要：随着西南山区交通需求的持续增长,出现大量的路基拼宽工程。针对高填方路基拼宽,悬臂式挡土墙具有较强的适应性。以贵州纳雍至晴隆高速公路寨乐枢纽互通XRK130+031~XRK130+244左侧高填方拼宽路基为依托工程,将悬臂式挡土墙应用于高填方拼宽路基支挡中,完善了挡土墙结构设计、稳定性分析等。采用有限元分析,总结得出悬臂式挡土墙在墙背分层回填、施加超载等7种工况下应力、位移变化规律。With the continuous growth of traffic demand in the southwest mountainous areas,a large number of subgrade widening projects have appeared.Cantilever retaining wall has strong adaptability for widening of high fill subgrade.In this paper,the cantilever retaining wall is applied to the retaining of the high fill and wide subgrade on the left side of the interchange XRK130+031~XRK130+244 of Zhaila hub of the Nayong-Qinglong Expressway in Guizhou,which improves the structural design and stability analysis of the retaining wall.Based on the finite element analysis,the stress and displacement change rules of cantilever retaining wall under 7 working conditions,such as layered backfill at the back of the wall and overloading,are summarized.

关 键 词：悬臂式挡土墙 拼宽路基 有限元 修正Mohr-Coulomb模型 

分 类 号：TU413.62[建筑科学—岩土工程]