摘要
以南京-连云港高速公路南京段水泥混凝土路面改造工程为研究对象,采用弹性和粘弹性理论分析了加铺层结构为4 cmSMA13+8 cmSUPERPAVE25+10 cm的沥青稳定碎石LSM25沥青混凝土加铺层的受力特性。研究表明:沥青混凝土加铺层的粘弹性性质对加铺层表面的竖向位移有一定的影响,随着深度的增加,这种影响逐渐减弱;沥青混凝土加铺层的粘弹性性质对加铺层不同深度处的竖向应力的影响较小;高温稳定性是沥青稳定碎石LSM25层沥青混合料材料设计的重点;SUPERPAVE25混合料设计的重点是控制材料的疲劳性能;加铺层厚度h=19 cm时,SUPERPAVE25层底拉应变最大,增加和减小加铺层厚度,SUPERPAVE25层底拉应变呈现减小趋势;随着沥青稳定碎石模量的提高,加铺层中各深度处的竖向压应变和水平方向应变明显降低。
The freeway Nanjing-Lianyungan was reconstructed through paving an asphalt concrete overlay on the old cement concrete pavement. The structure of the overlay is 4 cm SMA13＋8 cm SUPERPAVE25＋10 cm LSM. The mechanic performance of the overlay was studied with visco-elasticity theory. The results show that the overlay^s visco-elasticity property has a certain effect on the settlement of pavement with vertical stress, its stability at high temperature must be taken into account to design LSM, the key point of designing SUPERPAVE25 is to control its fatigue behavior. When the thickness of the overlay is 19 cm, the strain under SUPERPAVE25 reaches the largest value. With the increasing of LSM modulus, the vertical and horizontal strain in the overlay is reduced obviously. 2 tabs, 11 figs, 6 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第6期23-26,共4页
Journal of Chang’an University(Natural Science Edition)
基金
高等学校博士学科点专项基金项目(2000028608)
关键词
道路工程
旧水泥混凝土路面
沥青混凝土
加铺层
粘弹性
road engineering
old cement concrete pavement
asphalt concrete
overlay
visco-elasticity
作者简介
葛折圣（1974-），男，安徽桐城人，东南大学博士研究生．
