饱和冻土与饱和土交界面平面纵波传播特性研究

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2025-08-18 DOI:10.1016/j.coldregions.2025.104643

Jialun Zhang , Qiang Ma , Fengxi Zhou , Zhenning Ba

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引用次数: 0

摘要

由于全球变暖和人类活动加剧，夏季部分地区多年冻土的融化导致饱和土-饱和冻土地质界面的形成。为此，本研究基于多孔介质弹性波传播理论，建立了饱和冻土与饱和土介质界面弹性波传播模型。采用数值计算和三维可视化技术，分析了饱和冻土的入射频率、入射角、孔隙度、泊松比、温度以及饱和土壤的孔隙度和泊松比等参数对界面处振幅透射/反射系数和能量通量的影响。结果表明，波速越高，透射、反射系数和能量通量对入射频率变化的阻力越大。饱和冻土介质中温度、泊松比、孔隙率等参数的变化对反射波的影响大于对透射波的影响。相反，饱和土介质参数的变化对透射波的影响大于对反射波的影响。当两种介质的孔隙度或泊松比在同一范围内变化时，某些透射/反射波形的振幅系数和能量通量随参数变化的趋势完全相反。

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Study on the propagation of plane longitudinal waves at the interface between saturated frozen soil and saturated soil

Due to global warming and intensified human activities, the thawing of permafrost in some regions during summer has resulted in the formation of a saturated soil–saturated frozen soil geological interface. In response, this study establishes a wave propagation model for elastic waves at the interface between saturated frozen soil and saturated soil media, based on elastic wave propagation theory in porous media. Numerical calculations and three-dimensional visualization techniques are employed to analyze the influence of various parameters—such as incident frequency, incident angle, porosity, Poisson's ratio, and temperature in the saturated frozen soil, as well as porosity and Poisson's ratio in the saturated soil—on the amplitude transmission/reflection coefficients and energy flux at the interface. The results show that higher wave velocities enhance the resistance of transmission and reflection coefficients and energy flux to changes in incident frequency. Variations in the parameters of the saturated frozen soil medium, such as temperature, Poisson's ratio, and porosity, have a greater impact on reflected waves than on transmitted waves. Conversely, changes in the parameters of the saturated soil medium have a greater effect on transmitted waves than on reflected waves. When porosity or Poisson's ratio is varied within the same range in both media, some transmission/reflection waveforms exhibit completely opposite trends in amplitude coefficients and energy flux with respect to parameter variation.

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.