摘要
针对既有挡墙病害加固工程现场施工、安全等问题,提出了一种垛墙结合竖向预应力锚索复合支挡的新型加固结构。该补强结构中采用竖向锚索提供挡墙抗倾覆力矩,增加了既有挡墙的抗倾覆稳定性,锚索的预应力增加了挡墙的抗滑移稳定性。采用极限平衡法理论及FLAC有限差分软件对其受力和变形机理进行了计算分析,并结合实际工程检测其加固效果。结果表明:垛墙结合竖向锚索复合支挡结构能有效控制既有挡墙的变形,有效地提高了既有挡墙的安全系数,达到规范要求;现场实际应用效果良好,可为类似既有挡墙病害治理提供参考。
Aiming at the problems of construction and safety in the reinforcement project of existing retaining wall diseases,a new type of reinforcement structure was proposed,which was composed of buttress wall and vertical prestressed anchor cable.The vertical anchor cable was used to provide the anti-overturning moment of the retaining wall,which increased the anti-overturning stability of the existing retaining wall,and the prestress of the anchor cable increases the anti-sliding stability of the retaining wall.The theory of limit equilibrium method and FLAC finite difference software were used to calculate and analyze its stress and deformation mechanism,and the reinforcement effect was tested combined with the actual project.The results show that the buttress wall combined with vertical anchor cable composite retaining structure can effectively control the deformation of the existing retaining wall and improve the safety factor of the existing retaining wall,which can meet the requirements of the specification.The field application effect is reasonably well,which can provide reference for similar existing retaining wall disease treatment.
作者
马华
高俊合
张院生
MA Hua;GAO Junhe;ZHANG Yuansheng(China Academy of Railway Sciences Shenzhen Research and Design Institute,Shenzhen Guangzhou 518054,China;Housing and Construction Bureau of Dapeng New District,Shenzhen Guangzhou 518000,China)
出处
《铁道建筑》
北大核心
2021年第4期89-92,共4页
Railway Engineering
基金
铁科院(深圳)研究设计院有限公司基金(1852SZ0502)。
关键词
垛墙
竖向预应力锚索
现场试验
数值模拟
既有挡墙
Buttress wall
vertical prestressed anchor cable
field test
numerical simulation
existing retaining wall
