For highly-saturated soils, the effect of air bubbles on the consolidation of soil is mainly reflected by the compressibility of pore fluid. In this paper, the effect of compressible pore fluid and anisotropic permeability on the soil mechanism is investigated based on the Biot’s consolidation theory and analytical layer element method (ALEM). The response of pile in highly-saturated soils is further investigated by employing the finite element method and theory of one-dimensional bar. The effects of compressibility of pore fluid and anisotropic parameter are investigated by means of numerical computation. The results show that the compressibility of pore fluid has a significant effect on the pile’s initial deformation while has less influence on the final displacement. The peak value of pore pressure in a highly-saturated soil with a larger compressibility is smaller and appears later. It takes less time for the pore water to completely dissipate in highly-saturated soil with a larger horizontal permeability coefficient.

对于高饱和土，气泡对土体固结的影响主要体现在孔隙流体的可压缩性上。本文基于Biot固结理论和解析层元法(ALEM)研究了可压缩孔隙流体和各向异性渗透率对土壤机理的影响。采用有限元方法和一维杆理论，进一步研究了高饱和土中桩的响应。通过数值计算研究了孔隙流体压缩性和各向异性参数的影响。结果表明，孔隙流体的可压缩性对桩的初始变形有显着影响，而对最终位移的影响较小。压缩性较大的高饱和土的孔隙压力峰值较小，出现较晚。在水平渗透系数较大的高饱和土壤中，孔隙水完全消散所需的时间较短。