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艾智勇, 胡亚东, 曾文泽. 井点降水时可压缩渗透各向异性地基固结分析[J]. 岩土工程学报, 2013, 35(zk2): 501-505.
引用本文: 艾智勇, 胡亚东, 曾文泽. 井点降水时可压缩渗透各向异性地基固结分析[J]. 岩土工程学报, 2013, 35(zk2): 501-505.
AI Zhi-yong, HU Ya-dong, ZENG Wen-ze. Axisymmetric consolidation of multi-layered foundation with anisotropic permeability and compressible fluid due to well point sink[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk2): 501-505.
Citation: AI Zhi-yong, HU Ya-dong, ZENG Wen-ze. Axisymmetric consolidation of multi-layered foundation with anisotropic permeability and compressible fluid due to well point sink[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk2): 501-505.

井点降水时可压缩渗透各向异性地基固结分析

Axisymmetric consolidation of multi-layered foundation with anisotropic permeability and compressible fluid due to well point sink

  • 摘要: 从孔隙弹性力学的基本方程出发,采用Laplace-Hankel积分变换技术,推导出流体可压缩渗透各向异性轴对称地基固结的广义位移量和广义应力量在变换域内的解析表达式;基于解析层元法理论,通过引入相关问题的边界条件和层间连续性条件,构建多层地基的总刚度矩阵并进行求解,对相应解答进行Laplace-Hankel逆变换,以获得其在物理域内的真实解。通过编制相应的程序进行数值计算,并与现有文献结果进行对比以验证本文理论及计算方法的正确性;计算结果表明:井点降水速率越快,地基表面沉降越大;在相同的时间因子下,流体的可压缩性可导致地基表面的固结沉降减小。

     

    Abstract: Starting from the governing equations for axisymmetric consolidation of poroelastic materials with anisotropic permeability and compressible fluid, and using the technique of Laplace-Hankel transform, the generalized expressions for the displacements and stresses of materials in transformed domain are derived. Based on the theory of the analytical layer-element method, the global stiffness is assembled by imposing the boundary conditions and continuity between layers on the problem. Applying the inversion of the Laplace-Hankel transform, the solution to the consolidation problem of multi-layered foundation due to well point sink is obtained. In order to verify the proposed theory, numerical results are carried out by means of the compiled procedure and compared with the existing references. The numerical results demonstrate that the bigger the velocity of well point sink, the more quickly the surface displacement, and the feature of compressible fluid can decease the development of surface displacement under the same time factor.

     

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