水位变化对于移动荷载作用下土体动力响应的影响研究

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摘要本文采用上覆弹性层饱和地基土模型描述水位于地表以下的地基动力响应问题，利用改变弹性层厚度模拟土体中水位的变化。基于Biot饱和多孔介质动力方程和层间连续性条件，求解出上覆弹性层饱和半空间频域波数内位移场表达式，通过Fourier逆变换得到三维空间域的结果，研究了水位变化对于土体动力响应的影响。数值计算结果表明：水位的变化会对地基中波的传播产生一定影响。当水位离地面较深时，地面竖向位移值与弹性半空间情况类似；随着水位上升，弹性层和饱和半空间界面上的反射波会对地面竖向位移产生影响，导致地表位移值较弹性半空间下的结果有所增大，当水位接近地表时，位移值变化类似于饱和地基土。

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	姚锦宝1
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	董隆华2

关键词 ：水位变化, 饱和土, 移动荷载, 动力响应

Abstract：The saturated foundation soil model of the overlying elastic layer is used to describe the dynamic response of the foundation with water below the surface, and the change of the water level in the soil is simulated by changing the thickness of the elastic layer. Based on the Biot saturated porous media dynamic equation and the interlayer continuity condition, the displacement field expression in the overlying elastic layer is solved in the saturated half-space frequency domain wavenumber, and the results in the three-dimensional space domain are obtained by Fourier inverse transformation. The results of numerical examples show that the change of water level will significantly affect the wave propagation in the foundation. When the water level is deep from the ground, the vertical displacement of the ground is close to that of the elastic half space. Then, as the water level increases, the reflected waves on the interface between the elastic layer and the saturated half space will affect the vertical displacement of the ground, and the surface displacement will gradually decrease until the water level is close to the ground, and the displacement change is close to that of the saturated soil foundation.

Key words： Water table change Saturated soil Moving load Dynamic

收稿日期: 2022-09-13 出版日期: 2023-11-15

引用本文:

姚锦宝1,2，董隆华2. 水位变化对于移动荷载作用下土体动力响应的影响研究[J]. 振动与冲击, 2023, 42(21): 272-277.
YAO Jinbao1,2, DONG Longhua2. Effects of water level change on dynamic response of soil body under moving load. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(21): 272-277.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I21/272

[1] 夏禾,吴萱,于大明.城市轨道交通系统引起的环境振动问题[J].北方交通大学学报,1999,23(4): 1-7.
XIA He, WU Xuan, YU Daming. Environment Vibration Induced by Urban Rail Transit System[J]. Journal of Northern Jiaotong University, 1999, 23(4): 1-7.
[2] Eason, G. The stresses produced in a semi-infinite solid by a moving surface force. International Journal of Engineering Science, 1965, 2(6):581–609.
[3] Lefeuve-Mesgouez G, DL Houédec, Peplow A T. Ground vibration in the vicinity of a high-speed moving harmonic strip load[J]. Journal of Sound & Vibration, 2000, 231(5):1289-1309.
[4] Andersen L, Nielsen S R K. Boundary element analysis of the steady-state response of an elastic half-space to a moving force on its surface[J]. Engineering Analysis with Boundary Elements, 2003, 27(1):23-38.
[5] P Galvín, J Domínguez. Analysis of ground motion due to moving surface loads induced by high-speed trains- Science Direct[J]. Engineering Analysis with Boundary Elements, 2007, 31(11):931-941.
[6] Biot M A. Theory of propagation of elastic waves in a fluid-saturated porous solid. I. Low frequency range. The Journal of the Acoustical Society of America, 1955, 28(182):168-191.
[7] Biot M A. Theory of propagation of elastic waves in a fluid-saturated porous solid : II. Higher frequency range[J]. The Journal of the Acoustical Society of America, 1956, 28(2):179-191.
[8] Theodorakopoulos D D, Chassiakos A P, Beskos D E. Dynamic effects of moving load on a poroelastic soil medium by an approximate method[J]. International Journal of Solids & Structures, 2004, 41(7):1801-1822.
[9] Lu J F, Jeng D S . A half-space saturated poro-elastic medium subjected to a moving point load[J]. International Journal of Solids and Structures, 2007, 44(11-12):573-586.
[10]高广运, 李宁, 何俊锋, 等. 列车移动荷载作用下饱和地基的地面振动特性分析[J]. 振动与冲击, 2011, 30(6):86-92.
GAO G. Y, LI N, HE J. F, et al. Analysis of ground vibration generated by train moving loads on saturated soil[J]. JOURNAL OF VIBRATION AND SHOCK, 2011, 30(6):86-92.
[11] GAO G. Y, CHEN Q. S, HE J. F, et al. Investigation of Ground Vibration Due to Trains Moving on Saturated Multi- Layered Ground by 2.5D Finite Element Method[J]. Soil Dynamics & Earthquake Engineering, 2012, 40: 87-98.
[12] Alamo G M, Bordon J, Aznarez J J, et al. The effectiveness of a pile barrier for vibration transmission in a soil stratum over a rigid bedrock[J]. Computers and Geotechnics, 2019, 110:274-286.
[13] 王全才, 王浩, 吴清. 地下水位变化对达渝公路K144滑坡稳定性影响[J]. 工程地质学报, 2012, 20(supple):222-230.
Wang Q.C, Wang H, Wu Q. Change of Groundwater Level Influence on K144 Landslide Stability at Dayu Freeway[J]. Journal of Engineering Geology, 2012, 20(supple):222-230.
[14] 蔡袁强, 赵国兴, 郑灶锋,等. 上覆弹性土层横观各向同性饱和地基竖向振动分析[J]. 浙江大学学报(工学版)：2006, 40(2): 267-271.
Cai Y.Q, Zhao G.X, Zhen D.F, et al. Vertical vibration analysis of transversely isotropic saturated soils with elastic superstratum[J].Journal of Zhejiang University (Engineering Science) , 2006, 40(2): 267-271.
[15] Feng S J, Li Y C, Chen H X, et al. Response of pavement and stratified ground due to vehicle loads considering rise of water table[J]. International Journal of Pavement Engineering, 2017:1-13.
[16] Johnson DL, Koplik J, Dashen R. Theory of dynamic permeability and tortuosity in fluid-saturated porous-media. Journal of Fluid Mechanics,1987;176:379–402.
[17] Jones D V, Houedec D L, Petyt M. Ground vibrations due to a rectangular harmonic load[J]. Journal of Sound & Vibration, 1998, 212(1):61-74.