武广客运专线灰岩残积层红粘土变形参数研究

Research on Deformation Parameters of Limestone Residual Layer of Red Clay in Wuhan-Guangzhou Railway Passenger Dedicated Line

地基土的变形模量是地基变形计算中的重要参数,一般要通过代价昂贵的平板载荷试验来获取。而室内试验虽可方便地获取土的压缩模量,但因取样过程中的扰动,致使压缩模量与变形模量之间并不符合理论关系公式。我们基于室内试验与现场平板载荷试验的对比分析,结合已有经验公式,得出适用于武广客运专线红粘土路段的变形模量经验取值公式,为由室内试验参数估算现场土体的变形模量提供理论依据。

Deformation modulus,an important parameter for foundation settlement calculating,is usually obtained from very expensive plate load tests.The compression modulus of soil can be easily got form laboratory tests.Because of the disturbance in sampling,the relationship between the two parameters does not agree with the theoretical formula.Comparing laboratory with in-situ tests results,a new formula of deformation modulus was established combing with exist empirical equation for Wuhan Guangzhou railway passenger dedicated line.The achievement provides theory reference for using laboratory parameter tests to estimate field deformation modulus.