韩志斌


摘 要:弯沉是公路建设质量控制过程中一个十分重要的指标,当前多采用回弹弯沉值来反映路基路面的承载力情况,回弹弯沉值越小,则承载力越大。贝克曼梁是最常见的一种静力弯沉检测设备,也是通过载重汽车分级加载路面,由百分表获取路面回弹弯沉的一种检测方法。其突出特点为操作简单、效率高、方法简单和精度好。为此,本文在全面分析回弹弯沉检测影响因素的基础上,阐述了贝克曼梁法的技术原理,并通过具体工程案例,分析了贝克曼梁法在公路工程回弹弯沉检测中的应用要点。
关键词:公路工程;回弹弯沉;影响因素;技术原理
中图分类号:U416.06文献标识码:A文章编号:1003-5168(2020)17-0105-03
Research on Rebound Deflection Detection Method of Highway Engineering
HAN Zhibin
(Henan Transportation Research Institute Co., Ltd.,Zhengzhou Henan 450000)
Abstract: Deflection is a very important indicator in the quality control of highway construction, at present, the rebound deflection value is often used to reflect the bearing capacity of the roadbed, the smaller the rebound deflection value, the greater the bearing capacity. Beckman beams are the most common type of static deflection testing equipment, which is also a detection method to obtain the rebound and deflection of the road surface through the load meter by loading the road in stages. Its outstanding features are simple operation, high efficiency, simple method and good accuracy. To this end, based on a comprehensive analysis of the influencing factors of rebound deflection detection, this paper expounded the technical principles of Beckman beam method, and through specific engineering cases, analyzed the application points of Beckman beam method in highway deflection detection.
Keywords: highway engineering;rebound deflection;influence factor;technical principle
改革开放以来,我国交通建设事业取得了令人瞩目的成绩。公路工程是交通建设体系的主要构成部分,其质量是否满足设计要求,车辆运行是否舒适、安全已成为人们关注的焦点。近年来,随着交通压力的日益增大,越来越多路面出现了不同程度的早期病害,因此检验路基路面整体强度和刚度,做好公路工程检测工作至关重要[1-2]。回弹弯沉可以直接反映路基路面的整体承载能力,是衡量路面结构质量的重要指标之一。目前,常见的弯沉检测法主要分为两大类,即静力弯沉检测和动态弯沉检测[3-4],贝克曼梁法因其自身优势被广泛应用到公路路基路面回弹弯沉检测中,这种检测方法可有效提高检测精度。
1 回弹弯沉检测的影响因素
一定荷载作用下,路基路面产生垂直变形,待荷载卸除后即可恢复的那部分变形则被称为回弹弯沉。……