Rock and Soil Mechanics ›› 2022, Vol. 43 ›› Issue (4): 1135-1146.doi: 10.16285/j.rsm.2021.1029

• Numerical Analysis • Previous Articles     Next Articles

Propagation characteristics of P1 wave passing through wave impeding block in unsaturated soil

SHU Jin-hui 1, MA Qiang1, 2, ZHOU Feng-xi3, LI Qiang4   

  1. 1. School of Civil Engineering, Qinghai University, Xining, Qinghai 810016, China; 2. Qinghai Provincial Key Laboratory of Energy-saving Building Materials and Engineering Safety, Qinghai University, Xining, Qinghai 810016, China; 3. School of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 4. Gansu New Development City Development Construction Operation Group Co., Ltd., Lanzhou, Gansu 730010, China
  • Received:2021-07-08 Revised:2021-08-23 Online:2022-04-15 Published:2022-04-18
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (52168053, 51978320), the Youth Foundation of Qinghai Province Science and Technology Department Project (2021-ZJ-943Q) and the Funds for Creative Research Groups of Gansu Province (20JR5RA478).

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Abstract: Based on the theory of wave propagation in single-phase elastic medium and unsaturated porous medium and Snell's law, the propagation characteristics of P1 wave incidence on wave impeding block (WIB) from unsaturated soil are studied. The analytical solution of the amplitude ratio of reflected wave and transmitted wave of P1 wave passing through the wave impeding block in unsaturated soil is derived. The relation curves of amplitude ratios of reflected wave and transmitted wave with the shear modulus and density of the wave impeding block, angle of incident wave, frequency of incident wave, saturation and other parameters are analyzed, thus the influence laws of these parameters on the vibration isolation effect of the wave impeding block in unsaturated soil are obtained. The numerical results show that the shear modulus and density of the wave impeding block significant affect its vibration isolation effect, and the wave impeding block can achieve better vibration isolation performance when the shear modulus and density of the wave impeding block are within a certain range. The incident angle has a great influence on the vibration isolation performance of the wave impeding block, while the incident frequency has little influence on the vibration isolation performance.

Key words: unsaturated soil, wave impeding block, wave propagation, reflection amplitude ratio, transmission amplitude ratio

CLC Number: 

  • TU 452
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