就地冷再生路面的温度场与力学响应分析
ANALYSIS OF TEMPERATURE FIELD AND MECHANICAL RESPONSE OF IN SITU COLD RECYCLED PAVEMENTS
任仲山 1马辉 1张展铭1
作者信息
- 1. 江苏高速公路工程养护技术有限公司,南京 211106
- 折叠
摘要
为明确乳化沥青就地冷再生技术的路面使用性能,采用有限元法研究就地冷再生路面温度分布与力学响应情况.研究结果表明,就地冷再生路面相比铣刨加铺结构,对罩面材料的高低温性能要求更严格(高温相差3～4℃,低温相差0.5℃);冷再生路面的冷再生结构层内所受竖向压应力低于铣刨加铺(降低约2.0%),但压应变略大于铣刨加铺;冷再生结构能够降低冷再生结构层内的水平应力(降低约25%),但罩面层顶部水平压应力较铣刨加铺更大.
Abstract
To clarify the pavement performance of emulsified asphalt in situ cold recycling technology,a finite ele-ment method was used to study the temperature distribution and mechanical response of cold recycled pavements.The results indicate that cold recycled pavements have stricter requirements for the high and low-temperature perfor-mance of the surface materials compared to milling and overlay structures(with a temperature difference of 3-4℃ at high temperatures and 0.5℃ at low temperatures).The vertical compressive stress in the cold recycled structural layer is lower than that in milling and overlay(approximately 2.0％reduction),but the compressive strain is slightly greater.Additionally,the cold recycled structure can reduce horizontal stress within the structural layer by about 25％,al-though the horizontal compressive stress at the top of the surface layer is greater than that in milling and overlay.
关键词
就地冷再生路面/温度场/乳化沥青/冷再生结果Key words
in-situ cold recycled pavement/temperature field/emulsified asphalt/cold recycled results引用本文复制引用
出版年
2024
NETL
NSTL
万方数据