高速铁路中低压缩性土地基沉降控制有关问题研究  

Research on Settlement Control of Medium-Low Compressible Soil Foundation of High Speed Railway

作　　者：王瑷琳[1] 崔俊杰 韩志霞 张强 WANG Ai-lin;CUI Jun-jie;HAN Zhi-xia;ZHANG Qiang(Wuhan Railway Vocational College of Technology,Wuhan 430205,China;China RailwayEngineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China)

机构地区：[1]武汉铁路职业技术学院,武汉430205 [2]中铁工程设计咨询集团有限公司,北京100055

出　　处：《铁道标准设计》2018年第11期10-14,共5页Railway Standard Design

基　　金：中铁工程设计咨询集团有限公司科研课题(研10-4)

摘　　要：为优化和完善高速铁路中低压缩性土地基沉降控制技术,通过对大量的高速铁路路基勘察及土工试验资料的综合分析,研究中低压缩性土的基本工程特性;采用三轴试验、压缩试验、单元结构模型试验等土工试验方法,对中低压缩性土的变形状态及其随所受应力水平、时间变化的特性进行比较系统的研究,给出中低压缩性土的4种变形状态与其所受应力水平(荷载比)的关系;研究提出具有变形时间效应的地基压缩层厚度确定方法,并通过对比研究得出:高速铁路中低压缩性土地基的压缩层厚度,可采用0. 2倍应力比值法确定。To optimize foundation settlement control of medium-low compressible soil of high speedrailway, basic engineering characteristics of medium-low compressible soil are studied via comprehensiveanalysis of abundant subgrade survey and geotechnical experiment data collected from high speed railwayprojects. Specific experimental methods for soils such as triaxial test, compression test, unit structuralmodel test are applied to conduct a systematic research on the state of the deformation in medium-lowcompressible soil and on the corresponding variation characteristics of its stress level with time. Therelationship between four kinds of deformation state and stress level （ loading ratio ） are studied.Furthermore, a method for determining the thickness of subgrade compression layer with deformation timeeffect is proposed. Finally, the comparative research concludes that the thickness of the compressionlayer of medium-low compressible soil of high speed railway subgrade can be calculated by One-Fifth Stress Ratio Method.

关 键 词：高速铁路 路基 中低压缩性土 土体变形状态 压缩层厚度 

分 类 号：U213.157[交通运输工程—道路与铁道工程]