›› 2009, Vol. 30 ›› Issue (6): 1583-1589.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Discussion on mechanism and effect of Rayleigh wave on soil subjected to impact loading

NIU Zhi-rong1，LU Guo-yun2   

  1. 1. College of Civil Engineering and Architecture, Jiaxing University, Jiaxing 314001, China; 2. Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2007-11-23 Online:2009-06-10 Published:2011-03-09

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Abstract:

It is nonnegligible that the Rayleigh wave (R-wave) appearing and transmitting in soil subjected to impact loading (dynamic consolidation in engineering, DC for short). The research on mechanism and effect of R-wave on foundation is made in DC, where the transmitting characteristics，the influenced depth, the laws of deformation and volume variations of R-wave are discussed by means of the vibration characteristics of soil. It turns out that R-wave in DC is effective for the foundation; it is able to influence the depth about one wavelength, and can compact the soil under the hammer. On the other hand, it has some negative effects on the surface of foundation beside the tamping pit. The solving method of dispersion curve of R-wave in the layered foundation and the method of estimating the influenced depth of DC scientifically can be obtained. But Menard’s conventional formula can’t make a precise calculation of the depth. The practical examples are provided to verify the conclusion that DC can benefit more than destructive effect from R-wave.

Key words: impact loading, dynamic consolidation, Rayleigh wave, wavelength, effective reinforced wave

CLC Number: 

  • TU 435
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