路基处治土回弹模量的预估方法

A Method to Predict Resilient Moduli of Lime and Lime Cement Stabilized Soils Used in Highway Subgrades

关键词:  处治土  模拟试验  回弹模量  预估模型

Key words:  stabilized soil,simulation experiment,resilient modulus,prediction model

摘要:

低路堤路基土湿度的变化会对其回弹模量产生显著影响.采用水泥-石灰-土和石灰-土2种处治土,通过室内吸水、浸水和干-湿循环模拟试验,建立了回弹模量与龄期、饱和度以及干-湿循环次数的预估方程,并通过现场试验检测的路基土湿度,应用该预估方程对2种路基处治土的回弹模量进行了预估.结果表明:预估值与实测值较为吻合.

Abstract:

To simulate the effect of moisture content of subgrade soils on resilient moduli,three experimental stages(sucking water,soaking water,draining-moistening cycles) were conducted to develop the prediction models for both lime-cement soils and lime soils.Based on the laboratory test results,a comprehensive equation was developed to predict the elastic moduli of two types of stabilized soils.With the in-situ tests of subgrade soils,the elastic moduli of two types of stabilized soils can be predicted by the established prediction models,and the results indicate that the predicted values are close to the laboratory results.