摘要
为了考虑一年中季节含水量(含水质量分数)变化对土基强度的影响,保证土基强度设计取值的可靠性,在美国AASHTO沥青路面设计方法中采用有效回弹模量作为土基强度设计值。通过分析不同土基设计强度取值对沥青路面设计弯沉值、路面结构设计厚度及所能承受的交通荷载的影响,提出用有效回弹模量代替最不利季节模量作为土基强度设计值。研究结果表明,考虑季节变化的有效回弹模量值作为土基强度的设计取值,能够保证路面的整体结构强度,降低成本,使设计取值更具有合理性。
In order to consider the influence of the changes of water content to soil base＇s intensity, and guarantee the design value of soil base＇s intensity reliability, the soil base＇s effective modulus of resilience value is adopted in the asphalt pavement design of AASHTO. Through analyzing the impact on road surface deflection value, the thickness of road and transportation load in different seasons of modulus value, this paper proposes that the design value of soil base＇s intensity to replace the most disadvantage season module with soil base＇s valid modulus of resilience. The result shows that the soil base＇s effective modulus of resilience as soil base＇s intensity has more rationality when taking the seasonal change into consideration. 4 tabs, 1 fig, 9 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第5期14-17,共4页
Journal of Chang’an University(Natural Science Edition)
基金
国家西部交通建设科技项目(200131882594)
关键词
道路工程
土基强度
土基有效回弹模量
路面厚度
路表弯沉
road engineering
soil base＇s intensity
soil base＇s effective modulus of resilience
road thickness
road surface deflection
