水泥稳定碎石基层的层底拉应力影响因素分析

发布时间：2018-01-26 23:10

本文关键词： 道路工程水泥稳定碎石基层层底拉应力超载超压 Bisar.　出处：《中外公路》2017年02期 　论文类型：期刊论文

【摘要】：针对水泥稳定碎石基层铺筑期间经常出现结构损伤的情况,运用Bisar3.0软件计算分析了轴载增加和路面基层结构参数变化对结构层底受力的影响,结果表明:在铺筑下基层时,底基层厚度减小、模量增大将引起底基层最大应力值出现不同程度的增大;铺筑上基层时,底基层厚度减小会引起底基层和下基层层底最大应力值增加,下基层厚度减小导致底基层层底最大应力值增加,对下基层层底最大应力值有相反的影响;底基层模量增加会使底基层层底最大应力值增加,下基层层底将逐渐由受拉变为受压,同时,随着下基层模量的增加底基层层底最大应力值将会减小,下基层层底由受压逐渐变为受拉。
[Abstract]:In view of the frequent structural damage during the construction of cement stabilized macadam base course, the influence of the increase of axial load and the change of pavement base structure parameters on the stress on the bottom of the structure is calculated and analyzed by using Bisar3.0 software. The results show that when the base is laid, the thickness of the base decreases and the modulus increases, which results in the increase of the maximum stress value of the base to varying degrees. When laying on the base, the decrease of the thickness of the base will cause the increase of the maximum stress value of the bottom and the bottom of the bottom, and the decrease of the thickness of the lower base will lead to the increase of the maximum stress of the bottom. It has the opposite effect on the maximum stress value of the bottom of the lower base bed. With the increase of the modulus of the bottom, the maximum stress value of the bottom will increase, and the bottom of the lower base will gradually change from tension to compression, and the maximum stress of the bottom will decrease with the increase of the modulus of the lower base. The bottom of the lower base layer is gradually changed from compression to tension.
【作者单位】：湖南省高速公路管理局;长沙理工大学;益阳市交通规划勘测设计院;
【分类号】：U416.214
【正文快照】： 半刚性基层具有较高的刚度和较好的荷载扩散能力,是路面铺筑中主要的基层形式。但半刚性基层导致的路面早期破坏更为道路界关注,科研工作者们纷纷对其研究。对基层的研究主要集中在半刚性基层应用和材料设计参数的研究、半刚性基层抗裂技术和基层结构损伤的研究。在水泥稳定碎

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