基于连续压实检测方法的压实信号去噪及连续压实指标研究  

Study on Compaction Signal Denoising and Continuous Compaction Index Based on Continuous Compaction Test Method

作　　者：龙森[1] 钟立力[1] 胡兴尧[1] LONG Sen;ZHONG Lili;HU Xingyao(Guizhou Transportation Planning Survey&Design Academe Co.,Ltd.,Guiyang 550001,China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550001

出　　处：《路基工程》2018年第5期124-127,共4页Subgrade Engineering

摘　　要：路基压实过程中压路机振动信号存在各种噪声干扰,故选用常用的傅里叶去噪与小波去噪法,对路基试验段采集到的振动压实信号进行去噪,通过结果比对分析得出:小波去噪法能更好地保留压实信号的信息;进一步计算出两种去噪方法各自对应的压实指标HV,并与压实指标Evd进行相关性校验,发现小波去噪法对应的HV能够更好地反映土体压实状态。最后,在考虑小波去噪后信号的二阶谐波的基础上,提出了新的指标HVN,通过与Evd进行相关性校验,验证了新指标HVN更能准确反映土体压实状态。There are many kinds of noise existing in road roller vibratory signal during compaction process.Hence,wavelet denoising and Fourier denoising are introduced to denoise the vibratory compaction signals collected from the test section of the subgrade.It can be concluded from results comparison analysis that wavelet denoising methodology can reserve compaction signals better.Further calculation of the two denoising methods corresponding compaction index HV,compared with required compaction index E vd for correlation check,it can be found that wavelet denoising method s HV can better reflect the state of soil compaction.Finally,based on second order harmonic signal after wavelet denoising,this paper puts forward a new index HVN.Through correlation check with E vd,it proves that the new index HVN.can more accurately reflect the soil compaction state.

关 键 词：路基 连续压实检测 小波去噪 傅里叶去噪 相关性校验 

分 类 号：U213.1[交通运输工程—道路与铁道工程]