SMA沥青面层构造深度与摆值的关联性研究

孙华

摘 要：沥青面层的构造深度被普遍认为是影响摆值的重要因素，但二者是否存在一定的函数关系，目前国内还没有研究结果。本研究以福建省南平市的沥青路面为研究对象，利用摆式摩擦系数测定仪和构造深度测定仪对研究的各路段表面进行摆值和对应点的构造深度进行测量。通过对通车时间、摩擦系数和构造深度3个要素的关联性分析，旨在研究各要素之间是否存在着关联性。通过最后的研究分析，通车时间与摆值不存在函数关系。通车时间与构造深度在道路通车前期20个月内有一定关系，后期空隙率达4%左右时则不存在函数关系。构造深度与摆值存在函数关系，当构造深度为0.85 mm左右时，摆值最大，道路摩擦系数最大，道路行驶安全性能最佳。

关键词：沥青混凝土；构造深度；摆值；关联性

中图分类号：S773；TU528 文献标识码：B 文章编号：1006-8023（2018）05-0096-05

Abstract： The structural depth of asphalt surface is generally considered to be an important factor affecting the pendulum value， but whether there is a certain functional relationship between them has not yet been studied in China. In this study， the asphalt pavement in Nanping city of Fujian Province was studied， and the pendulum friction coefficient meter and structural depth meter were used to measure the pendulum value and the corresponding structural depth of each road section. By analyzing the relevance of the three elements of opening time， pendulum value， and structural depth， Designed to study whether there is a correlation between the various elements. Through the final research and analysis， there is no functional relationship between the opening time and the pendulum value. The opening time and structural depth had a certain relationship within 20 months of the opening of the road， and there was no functional relationship when the gap rate reached about 4 % in the later period. The structural depth has a functional relationship with the pendulum value.When the construction depth is about 0.85mm， the maximum swing value， the road friction coefficient is the largest， and the road driving safety performance is the best.

Keywords： Asphalt concrete； structural depth； pendulum value； relevance

0 引言

瀝青路面表面摩擦系数反映了路面的抗滑性能，摩擦系数越小，抗滑能力就越差，道路行驶安全性能就越差[1]，摩擦系数通常是采用摆式摩擦系数仪在现场测量得出，仪器刻度盘上指针的读数简称为摆值。通常认为，路面宏观构造和微观构造直接影响着路面抗滑性能，而路面构造深度是表征路面宏观构造的重要指标[2]。宏观构造是指沥青混凝土路面表层深度大于0.5 mm的构造，既是路面表面的凹凸，也称为表面构造深度[4]。微观构造多指的是表面石料的纹理[5]。本研究对福建省南平市的7条沥青路面进行试验，研究路面摆值是否由表面构造深度决定的，为相关的工程设计单位在沥青路面的粗、细集料配合比的选择上提供参考。……