高速铁路路基戈壁填料地基系数与变形模量分析  

Analysis of ground coefficient and modulus of deformation of gobi area filler in high-speed railway subgrade

作　　者：杨有海[1] 黄大维[1] 赖国泉[1] 夏琼[1] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070

出　　处：《岩土力学》2011年第7期2051-2056,2065,共7页Rock and Soil Mechanics

基　　金：铁道部科技研究开发计划项目(No.2009G020-C)

摘　　要：以兰新铁路第二双线路基试验段戈壁填料现场填筑试验为依据,分析了路基压实指标K30与Ev2的区别与联系;总结了4个试验工点K30与Ev2及Ev1变形曲线特性,并对地基系数K30与变形模量Ev的相关性进行了分析。结合室内土工试验,对影响K30与Ev2的因素进行总结。结果表明:填土的密实程度是影响K30与Ev1及Ev2/Ev1的主要因素;填料的性质是影响Ev2的主要因素,对Ev2/Ev1也有较大影响;Ev2为填料的特征参数,反映了路基的刚度;K30为填土压实质量控制指标,K30与Ev1的相关性较好,与Ev2的相关性相对较差,K30与Ev1及与Ev2的相关性的好坏还与填料的性质有关,检测指标越离散,相关性越差。Based on the gobi-filler test of testing for subgrade on the second double line of Lan-Xin Railway, the difference and relation between the ground coefficient K30 and the static modulus of deformation Ev2 were analyzed; and the curve feature of ground coefficient K30 and deformation modulus Ev of four different kinds of fillers were summed up; also, the correlation between K30 and Ev were analyzed. With more information of the laboratory test, the acting factors for K30 andEv2 were summed up. The results show that： ① The compaction quality of the soil is the main factor for K30, Ev1 and Ev2/Ev1. ② The nature of the filler is the main acting factor for Ev2 and it also has a influence on Ev2/Ev1. ③The Ev2 is the characteristic parameter for the filler; it reflect the rigidity of the subgrade.④ The K30 is the controlling index for compaction quality. ⑤ The correlation between K30 and Evl is closer, while K30 and Ev2 is slight; and different kinds of fillers have different correlations between K30 and Ev; the results reveal that the correlation is little with the checking indices become more disperse.

关 键 词：戈壁填料 高速铁路路基 地基系数 变形模量 

分 类 号：TU470[建筑科学—结构工程]