| 基于层间抗剪强度的同步碎石下封层的设计 |
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| 引用本文： | 周泽洪,郑南翔,纪小平.基于层间抗剪强度的同步碎石下封层的设计[J].长安大学学报(自然科学版),2011(2). |
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| 作者姓名： | 周泽洪 郑南翔 纪小平 |
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| 作者单位： | 长安大学特殊地区公路工程教育部重点实验室; |
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| 基金项目： | 国家西部交通建设科技项目(200831800029) |
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| 摘 要： | 针对同步碎石下封层的使用性能要求,提出了以层间抗剪强度作为设计指标的力学-经验设计法,采用McLeod经验法预估沥青用量,以预估的沥青用量作为中值成型5组不同沥青用量下的复合试件,进行了抗剪强度试验,以抗剪强度最大值对应的沥青用量作为最佳沥青用量;对只设置透层和透层+同步碎石封层的复合试件进行了抗剪、车辙和渗水对比试验。研究结果表明:力学-经验法设计的沥青用量比McLeod经验法降低约0.261kg/m2;相比透层复合试件,透层+同步碎石封层可提高复合试件的界面抗剪强度和车辙动稳定度约141%和27.6%,能够明显改善复合试件的抗渗性能。
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| 关 键 词： | 道路工程 同步碎石封层 设计方法 层间抗剪强度 |
Design of synchronous under-seal based on anti-shear strength between interlayers |
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| ZHOU Ze-hong,ZHENG Nan-xiang,JI Xiao-ping.Design of synchronous under-seal based on anti-shear strength between interlayers[J].JOurnal of Chang’an University:Natural Science Edition,2011(2). |
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| Authors: | ZHOU Ze-hong ZHENG Nan-xiang JI Xiao-ping |
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| Institution: | ZHOU Ze-hong,ZHENG Nan-xiang,JI Xiao-ping (Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang'an University,Xi'an 710064,Shaanxi,China) |
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| Abstract: | The mechanistic-empirical design method of synchronous under-seal was studied based on its performance requirements.In this method the anti-shear strength between interlayers was taken as design index.The first step was to estimate asphalt content with McLeod empirical design method,and then 5 kinds of specimens were formed with different asphalt contents and the estimated content set as the middle value,then the shear strength tests of the 5 kinds of specimens were carried out.Finally,the asphalt content w... |
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| Keywords: | road engineering synchronous seal design method anti-shear strength between interlayers |
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