软土路基桩承式挡墙设计及力学特性研究  

Study on Design and Mechanical Characteristics of Soft Soil Subgrade Pile-supported Retaining Wall

作　　者：田宇杰 Tian Yujie(Huashe Design Group Co.Ltd.,Nantong,Jiangsu 226001)

机构地区：[1]华设设计集团股份有限公司,江苏南通226001

出　　处：《江西建材》2024年第10期248-250,共3页

摘　　要：为提升软土路基挡墙施工质量,文中以江苏某市政道路项目为例,提出了新型桩承式挡墙设计方案,并对设计方案稳定性进行验证;模拟分析该方案力学变形特性,并对施工应用效果进行评估。结果表明,除1号桩外,其他桩均随着深度增加,桩身负弯矩先降低、后增加、再降低,存在两个显著的反弯点;路基顶面沉降量随距路基中心距离先平稳增加、后快速降低,最大路基顶面沉降量为40 mm;越靠近挡墙位置,最大桩身弯矩越大,桩身水平位移越大,桩身水平位移-深度曲线斜率越大;桩承式挡墙稳定性安全系数为1.2,大于计算要求值,即桩承式挡墙承载能力较强,处置效果较好。In order to improve the construction quality of soft soil subgrade retaining wall,a new pile-supported retaining wall design scheme was proposed with a municipal road project in Jiangsu as an example,and the stability of the design scheme was verified.The mechanical deformation characteristics of the scheme are simulated and analyzed,and the effect of construction application is evaluated.The results show that except for pile No.1,the negative bending moment of pile body decreases first,then increases and then decreases with the increase of depth,and there are two significant reverse bending points.With the increase of distance from the center of the subgrade,the settlement of the top surface of the subgrade decreases steadily at first and then rapidly,and the maximum settlement of the top surface of the subgrade is 40 mm.The closer to the retaining wall,the larger the maximum pile bending moment,the larger the horizontal displacement and the larger the slope of the horizontal displacement depth curve.The stability safety factor of pile supported retaining wall is 1.2,which is greater than the required value,that is,the pile supported retaining wall has strong bearing capacity and good treatment effect.

关 键 词：软土路基 桩承式挡墙 设计方案 力学性能 

分 类 号：TU99[建筑科学—市政工程]