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<p>The existence of a tunnel structure increases the liquefying potential of soils near the tunnel structure. Moreover, the shaking table test is an essential method for simulating the seismic response of underground structures. Considering the necessity of the above-mentioned liquefaction analysis for saturated loess tunnels, this study conducted analyses through the numerical simulation of a shaking table model to optimize the boundary conditions. The results revealed that it is necessary to consider the effect of the boundary conditions on the dynamic stress and static stress in shaking table tests conducted to analyze loess tunnel liquefaction. The vibration acceleration triggering soil liquefaction in actual sites may be obtained by modifying the mean ratio <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11204_2025_10058_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="14" /> </InlineMediaObject> <EquationSource Format="TEX">\(\overline{n }\)</EquationSource> <EquationSource Format="MATHML"><math> <mover> <mi>n</mi> <mo>¯</mo> </mover> </math></EquationSource> </InlineEquation>. As a novel method, the boundary condition of soil slope bodies with an angle <i>θ</i> at the two end faces of the model box is a more appropriate option for the liquefaction test of the loess tunnel stratum.</p>

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Effect of Model Box Constraint in Shaking Table Test for Liquefaction Analyses of Loess Tunnels

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Weigong Ma,
  • Lanmin Wang,
  • Dengke Li,
  • Weiwei Shao

摘要

The existence of a tunnel structure increases the liquefying potential of soils near the tunnel structure. Moreover, the shaking table test is an essential method for simulating the seismic response of underground structures. Considering the necessity of the above-mentioned liquefaction analysis for saturated loess tunnels, this study conducted analyses through the numerical simulation of a shaking table model to optimize the boundary conditions. The results revealed that it is necessary to consider the effect of the boundary conditions on the dynamic stress and static stress in shaking table tests conducted to analyze loess tunnel liquefaction. The vibration acceleration triggering soil liquefaction in actual sites may be obtained by modifying the mean ratio \(\overline{n }\) n ¯ . As a novel method, the boundary condition of soil slope bodies with an angle θ at the two end faces of the model box is a more appropriate option for the liquefaction test of the loess tunnel stratum.