预应力锚索桩板墙在高填方边坡中的失稳分析及加固研究  

Analysis on Instability and Reinforcement for Prestressed Anchor Cable Pile-plate Wall in High Fill Slope

作　　者：陈玉新 郭建辉 陈似华 Chen Yuxin;Guo Jianhui;Chen Shihua

机构地区：[1]广东博意建筑设计院有限公司,广东佛山528312

出　　处：《重庆建筑》2023年第1期55-57,共3页Chongqing Architecture

摘　　要：预应力锚索桩板墙支护作为高填方边坡的常见支护结构,在某些工程中具有一定的应用优势,但由于填土与支护结构相互作用机理复杂,常出现方案选型不合理或施工不满足规范要求导致高填方边坡失稳情况,严重危害人身及财产安全。该文依托某预应力锚索桩板墙支护高填方边坡工程,详细分析高填方支护结构的失稳原因,明确了预应力锚索失效是高填方边坡失稳的直接原因。失稳后采用“H型”双排桩+连梁支护方案,并采用数值模拟对加固方案的不同开挖工况进行分析,加固后的边坡顶部位移为29.6mm,最大弯矩为15968kN·m,整体稳定性系数为3.689,满足规范及现场要求,确保了后期边坡的安全,加固效果显著。As a common supporting structure for high fill slopes,anchor cable pile-plate wall has some advantages in the application of some engineering projects,but due to the complex interaction mechanism between filled soil and the retaining structure,there often occurs high fill slope instability because of unreasonable scheme selection or inability to meet the specification requirements,causing serious damage to life and property safety.In this paper,based on a high fill slope project supported by anchor cable pile-plate walls,the instability reasons of the high fill support structure are analyzed in detail,and the failure of prestressed anchor cable is the direct cause of the high fill slope instability.After instability occurs,the“H-type”double row piles+beam support is adopted,and the different excavation conditions of the reinforcement scheme are analyzed by numerical simulation.The top displacement of the slope after reinforcement was 29.6mm,the maximum bending moment was 15968 k N.m,and the overall stability coefficient is 3.689,which meet the requirements of the code and the site,and ensure the safety of the slope in the later period,with remarkable reinforcement effects.

关 键 词：高填方边坡 锚索桩板墙 数值模拟 失稳 边坡加固 

分 类 号：TU476[建筑科学—结构工程]