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长寿命沥青路面沥青层力学分析及其层位划分研究

, PP. 13-17

Keywords: 道路工程,长寿命沥青路面(LLAP),力学计算,层位划分

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Abstract:

基于我国沥青路面设计理论及标准,参考国际成功的长寿命沥青路面结构,选取不同的长寿命沥青路面结构与材料参数,如结构层厚度、模量和泊松比等,采用BISAR3.0路面力学计算程序计算不同深度处的力学响应,分析其计算结果.数据分析结果表明,对于长寿命沥青路面结构其力学响应规律具有普遍性,在综合考虑各种结构层材料性能与厚度条件下,沥青层内0~7cm为高受力复合区域,是各种损坏最易发生区域;沥青层最大拉应变易出现在沥青层表面和沥青层底面,是产生路表开裂和沥青层底疲劳开裂的主要原因;沥青层合理划分为3层,分别为磨耗层、联结层和下承层,给出了各结构层应满足的力学性能要求及厚度范围.

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