基层铺筑时施工车辆对石灰土底基层的力学影响分析

Effect of vehicle on lime subbase in the construction processing of pavement base

石灰土底基层的结构承载能力与养护时间密切相关.为探求基层施工期间,石灰土底基层在汽车轮作用下内部的力学行为、路面的损坏机理和类型,本文首先通过室内试验研究,获得了石灰土不同龄期的各种路用性能.然后利用Bisar3.0程序计算出龄期、施工车辆轴载、水平荷载等各种因素作用下,弯沉、层间剪应力和层底拉应力等力学指标变化规律,这对改善半刚性基层沥青路面早期破坏现象具有一定的借鉴作用.

Structural bearing capacity of lime sub-base is closely related with the curing time.In order to find lime sub-base＇s inside mechanical behavior,type and damage mechanism of road surface under the vehicle effect during base construction.At first road performance parameters were acquired at different age of lime soil through laboratory experiments in this paper.Then using the Bisar3.0program calculate the variation of deflection,layer the bottom shear stress and tensile stress level and other mechanical indicators,under age,construction vehicles axle load,horizontal load and other factors.This will provide certain reference function for improving the early damage phenomenon of semi rigid base asphalt pavement.