西部黄土地区高速铁路地基处理效果与沉降特性研究  

作　　者：熊乾 

机构地区：[1]武汉铁路职业技术学院,武汉430200

出　　处：《科技创新与应用》2025年第5期94-98,共5页Technology Innovation and Application

摘　　要：以西部黄土地区某高速铁路建设工程为基础,结合工程所处地区的基本条件,对路基段落采用的冲击碾压、螺杆桩复合地基、CFG桩复合地基3种地基处理方式进行分析;并对不同地段的地基进行沉降观测,选取典型断面对其沉降规律进行分析,对高速铁路黄土路基中不同地基处理方法的适用性进行研究。研究结果显示,高速铁路所处地区夏秋两季雨量较大,降水和地表水可能渗入土体,使其承载力降低,不利于路基工后沉降控制;原冲击碾压处理区段土体含水量小、土层厚度不均、冲击碾压效果较差,宜采用强夯优化处理;采用强夯、螺杆桩及CFG桩复合地基的处理方式,能够满足该高速铁路不同区段黄土路基的沉降控制要求,可为今后西部黄土地区高速铁路建设提供借鉴参考。Based on a high-speed railway construction project in the western loess area and combined with the basic conditions of the area where the project is located,the three foundation treatment methods used in the subgrade section are analyzed:impact rolling,screw pile composite foundation,and CFG pile composite foundation;and the settlement observation of the foundation in different sections is carried out,typical sections are selected to analyze its settlement laws,and the applicability of different foundation treatment methods in the loess subgrade of high-speed railway is studied.The research results show that the area where the high-speed railway is located has heavy rainfall in summer and autumn,and precipitation and surface water may penetrate into the soil body,reducing its bearing capacity,which is not conducive to post-construction settlement control of the subgrade.The soil body in the original impact rolling treatment section has small water content,uneven soil layer thickness,and poor impact rolling effect,so dynamic compaction should be used for optimization treatment.The use of dynamic compaction,screw piles and CFG piles composite foundation treatment methods can meet the settlement control requirements of loess subgrade in different sections of the high-speed railway,and can provide reference for future high-speed railway construction in the western loess area.

关 键 词：高速铁路 黄土路基 强夯 螺杆桩 CFG桩 沉降特性 

分 类 号：U416.1[交通运输工程—道路与铁道工程]