桩基托梁挡墙在软土路基旧路拓宽滑坡整治中的应用  

Application of Pile Foundation Joist Retaining Wall in Landslide Treatment of Soft Soil Roadbed Widening

作　　者：张启凯 ZHANG Qikai(China Railway Fifth Survey and Design Institute Group Co.,Ltd.,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计研究院集团有限公司,北京102600

出　　处：《北方建筑》2025年第1期110-113,共4页Northern Architecture

摘　　要：为解决既有公路拓宽过程中出现的滑坡失稳问题,本文以某高速枢纽主线拓宽工程施工中发生的滑坡失稳整治工程为例,提出了桩基托梁处治方案。首先,通过简化Bishop法分析设置桩基托梁挡墙方案的稳定系数及潜在滑面,确定桩基托梁挡墙的可行性。随后,采用三维数值模拟建立了旧路、拓宽路基、支挡结构与地层的整体三维模型,评估应用该方案后的工点沉降变形、支挡结构的变形及受力情况。结果表明:桩基托梁挡墙能够有效控制软土路基在旧路拓宽的沉降变形,确保工程稳定性,加快施工进度,具有较好的工程经济价值。In order to solve the problem of landslide instability in the process of widening the existing highway,this paper takes the landslide instability rectification project in the construction of the main line widening project of a high-speed junction as an example,and puts forward the treatment plan of pile foundation joist.Firstly,the simplified Bishop method was used to analyze the stability coefficient and potential slip surface of the pile joist retaining wall scheme to determine the feasibility of the pile joist retaining wall.Then,three-dimensional numerical simulation was used to establish the whole three,dimensional model of the old road,widened road-retaining structure and the stratum,and to evaluate the settlement deformation of the working point,deformation and stress of the retaining structure after the application of this scheme.The results show that the pile foundation joist retaining wall can effectively control the settlement and deformation of the widening of the old soft soil roadbed,ensure the stability of the project,accelerate the construction progress,and have good engineering economic value.

关 键 词：公路工程 桩基托梁挡墙 数值模拟 旧路拓宽 滑坡整治 

分 类 号：U471.8[机械工程—车辆工程]