施工技术 2013年3月上 82 CONSTRUCTIONTECHNOLOGY 第42卷第5期 DO1:10.7672//sgjs2013050082 基于压路机的车载式路基压实度无损检测技术研究* 王磊,陈运明,刘孝明,尚龙飞 (郑州大学水利与环境学院,河南郑州450001) 【摘要】大型施工机械的快速发展使得压实度检测设备相对滞后,针对目前已有检测方法存在的不足,以虚拟仪器 为软件开发平台,以NIUSB-9233为硬件架构,开发了路基压实度无损检测设备,通过分析不同含水率对加速度信 号的影响,分别以幅值法、谐波比值法和应变率法对压实度和加速度信号幅值的线性相关性进行分析。
试验结果 表明,幅值法线性相关性最高,相关系数达0.9246,利用该设备对现场压实度进行预测,与传统压实度检测方法的 误差在1.5%以内,满足工程要求。
[关键词]公路工程;虚拟仪器;加速度信号;无损检测;压实度;幅值法 [中图分类号]TU443;U416.1 [文献标识码】A [文章编号】1002-8498(2013)05-0082-04 Study on Subgrade Compactness Nondestructive TestingBased onVisualInstrument Wang Lei,ChenYunming,Liu Xiaoming,Shang Longfei (College ofWater Conservancy&Environmental Engineering,Zhengzhou Uniwersity,Zhengzhou,He'nan450001,China) Abstract: Compared with the fast development of heavy-section construction machinery,that of pactness detection equipments is lagging behind.In view of existed the insufficiency of the present detectionmethod,aroadbed pactnes nondestructive testing equipmentwas developedon the software development platform of virtual instrument and using NI USB-9233 as the hardware architecture. Through the analysis of different moisture content on the influence of the acceleration signal, the degree of pactness and the acceleration signal amplitude of the linear correlation were analyzed respectively with methods of amplitude method,harmonic ratio method and strain rate method.The test results show that the linear correlation of amplitude method is the highest and the‘correlation coefficient can reach 0.9246.What's more,when using this equipment to predict the degree of pactness, the eror is within 1.5% pared with the traditional test method,which meet the engineering requirements. Key words:road construction; visual instruments; acceleration signal;nondestructive testing; pactness;amplitude method 目前,国内外检测压实质量的技术主要有环刀为抽样检测法,只能反映某些点的压实状况,不能 法等。
未被检测到的薄弱地带,从而给工程埋下质量隐患。
传统的环刀法和灌砂法虽然能够得到比较准 基于以上问题,本研究引人虚拟仪器(visual 确的结果,但因其检测周期长、劳动强度大,且为破instruments),开发了基于虚拟仪器的智能压路机系 坏性试验,很难与现代化的大型施工机械相适应, 统,充分利用虚...