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软土密实度瞬态锤击测试信号的小波多分辨分析
引用本文:靳建明,王奎华,卜发东,谢康和.软土密实度瞬态锤击测试信号的小波多分辨分析[J].岩石力学与工程学报,2004,23(13):2271-2275.
作者姓名:靳建明  王奎华  卜发东  谢康和
作者单位:1. 浙江大学岩土工程研究所,杭州,310027
2. 山东省建筑科学研究院,济南,250031
摘    要:利用小波变换能将信号分解为高低不同频带的原理,以及AR谱分析法相对于传统的FFT谱具有频率分辨率高的特点,提出了软土密实度瞬态锤击信号的小波.AR谱分析方法。通过对室内试验测试信号的分析,获得了如下结论:在含水量一致的情况下,试样测试信号的主峰频率随平均值干密度的增加而增加;在干密度一致的情况下,试样测试信号的主峰频率平均值随含水量增加而减小。试验结果表明,采用瞬态锤击法测试软土密实度是可行的。

关 键 词:土力学  软土  密实度  瞬态锤击  小波分析  AR谱分析
文章编号:1000-6915(2004)13-2271-05
收稿时间:2003-3-3
修稿时间:2003-4-29

MULTI-RESOLUTION WAVELET ANALYSIS ON COMPACTNESS MEASUREMENT OF SOFT SOIL BY INSTANT HAMMERING METHOD
Jin Jianming,Wang Kuihua,Bu Fadong,Xie Kanghe.MULTI-RESOLUTION WAVELET ANALYSIS ON COMPACTNESS MEASUREMENT OF SOFT SOIL BY INSTANT HAMMERING METHOD[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(13):2271-2275.
Authors:Jin Jianming  Wang Kuihua  Bu Fadong  Xie Kanghe
Affiliation:Jin Jianming1,Wang Kuihua1,Bu Fadong2,Xie Kanghe1
Abstract:In the construction of roadbed,it is still an important work to find a fast,nondestructive and precise measurement method for soil compactness. The method for measuring the compactness of soft soil by instant hammering,and the signal analysis method based the wavelet and AR spectrum analysis are put forward. By the analysis of signal measured in lab,the characteristic parameters are picked-up,and some useful conclusion is obtained. The main peak frequency is increased with the dry density under condition of same water content,but decreased with the water content under condition of same dry density. The analysis result shows that the method of instant hammering is feasible for determining compactness of soft soil.
Keywords:soil mechanics  soft soil  compactness  instant hammering  wavelet analysis  AR spectrum analysis
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