›› 2007, Vol. 28 ›› Issue (1): 188-192.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Numerical study on detection of heterogeneities in half space

CHAI Hua-you1, LU Ying-fa2, LI Qi1, LIU Ming-gui1   

  1. 1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. College of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2005-12-12 Online:2007-01-10 Published:2013-08-28

PDF (PC)

996

Abstract: The waves scattered by underground heterogeneities are studied by numerical simulation; and effects of the scattered waves on the surface wave velocity are analyzed. The results indicate that the location of a heterogeneity can not be effectively detected from variation of the phase velocity with the receiver position. Because energy of the scattered waves is small in the surface wave field, the scattered waves are not easily distinguished. When the source is taken as the center, and a group of receivers are symmetrically set along a measuring line, the scattered wave field can be obtained by comparing particle responses on two sides. The scattered Rayleigh waves dominate the scattered wave field, the locations of underground heterogeneities can be predicted by variation of traveling time of the scattered Rayleigh waves with the distance between the receiver and the source. Finally, the detection schemes are proposed.

Key words: surface wave, scattered wave, underground heterogeneity, phase velocity, dispersion curve

CLC Number: 

  • TU 45
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
[1] CUI Yong-Sheng , MA Lin , LIU Hong-yue , HUANG Jia-kun，. Discussion on geophysical methods applied to investigation of coral island and reef [J]. , 2014, 35(S2): 683-689.
[2] WU Zhi-jian, CHE Ai-lan, MA Wei, FENG Shao-kong, SHI Hang. Application study of transient surface wave survey on embankment in permafrost regions [J]. , 2010, 31(S2): 335-341.
[3] CHAI Hua-you, WEI Chang-fu. Behavior of Rayleigh waves in media with smoothly varying stiffness profile [J]. , 2009, 30(9): 2545-2551.
[4] HUANG Mao-song, REN Qing, ZHOU Ren-yi, HUANG Shao-min. Attenuation characters of Rayleigh wave in layered soils [J]. , 2009, 30(1): 113-117.
[5] HOU Lan-jie, CHEN Xing-zhang, CHEN Hui, CUI Chun-long. Research on models of surface wave velocity method for determining bearing capacity of cobble soil foundation [J]. , 2008, 29(9): 2572-2576.
[6] DONG Lian-cheng ，TAO Xia-xin ，SHI Li-jing ，LI Guang-ying . Inversion of shallow shear wave velocity profile of engineering site from recordings associated with microtremors array [J]. , 2008, 29(2): 553-556.
[7] CHAI Hua-you, WEI Chang-fu, BAI Shi-wei. Approximate approach to analyzing effective velocity of surface waves [J]. , 2008, 29(1): 87-93.
[8] CHAI Hua-you , BAI Shi-wei , LIU Ming-gui , LU Ying-fa . Analysis of behaviours of Rayleigh waves by stiffness matrix method [J]. , 2006, 27(2): 209-213.
[9] CHAI Hua-you，LU Ying-fa，LIU Ming-gui，LI Qi. Influences of measuring factors on spectral analysis in surface wave testing [J]. , 2004, 25(3): 347-353.
[10] LIU Ming-gui. Study on equivalence of dispersion curves in Rayleigh wave method between transient-state and steady-state [J]. , 2003, 24(4): 500-504.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] CUI Hao-dong, ZHU Yue-ming. Back analysis of seepage field of Ertan high arch dam foundation[J]. , 2009, 30(10): 3194 -3199 .
[2] ZHAO Hong-bao, YIN Guang-zhi, LI Xiao-shuang. Experimental study of characteristics of tensile burned gritstone[J]. , 2010, 31(4): 1143 -1146 .
[3] HE Si-ming, WU Yong, LI Xin-po. Research on mechanism of uplift rock-socketed piles[J]. , 2009, 30(2): 333 -337 .
[4] CHEN Zhi-qiang, ZHANG Yong-xing, ZHOU Jian-ying. Experimental study of deep tunnel surrounding rock rockburst proneness with similarity material simulating method based on digital speckle correlation technique[J]. , 2011, 32(S1): 141 -148 .
[5] DU Wen-qi, WANG Gang. Statistical analysis of earthquake-induced sliding displacements of earth structures[J]. , 2011, 32(S1): 520 -0525 .
[6] YAN Zhi-hua, LIU Zhi-wei, LIU Hou-jian. Treatment and parameter selection of high slope of a power plant located in the terraces of Yellow River[J]. , 2009, 30(S2): 465 -468 .
[7] XU Zhen-hao , LI Shu-cai , LI Li-ping , HOU Jian-gang , SUI Bin , SHI Shao-shuai. Risk assessment of water or mud inrush of karst tunnels based on analytic hierarchy process[J]. , 2011, 32(6): 1757 -1766 .
[8] WEN Shi-qing , LIU Han-long , CHEN Yu-min. Analysis of load transfer characteristics of single grouted gravel pile[J]. , 2011, 32(12): 3637 -3641 .
[9] GONG Si-yuan，DOU Lin-ming，HE Jiang，HE Hu，LU Cai-ping，MU Zong-long. Study of correlation between stress and longitudinal wave velocity for deep burst tendency coal and rock samples in uniaxial cyclic loading and unloading experiment[J]. , 2012, 33(1): 41 -47 .
[10] ZHONG Sheng ，WANG Chuan-ying ，WU Li-xin ，TANG Xin-jian ，WANG Qing-yuan. Borehole radar response characteristics of point unfavorable geo-bodies： forward simulation of its surrounding rock and filling condition[J]. , 2012, 33(4): 1191 -1195 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd