劈裂真空法加固软土固结性状研究

发布时间：2018-06-20 10:48

本文选题：劈裂真空法 + 固结　；参考：《扬州大学学报(自然科学版)》2016年04期

【摘要】：基于劈裂裂隙渗透性的分析,结合真空预压负压边界条件,建立了劈裂真空法固结性状分析模型,并利用理论模型分析裂隙位置、裂隙渗透性等因素对地基固结的影响.研究结果表明:理论固结模型计算得到的沉降值与室内模型试验结果吻合,裂隙加快了土体固结速率;当裂隙位于地基2/3深度时,裂隙提高地基固结速率最显著;随着裂隙渗透性增加,地基固结速率加快,当裂隙达到完全排水边界时,固结速率停止增长;随着土层厚度与砂井影响半径比值的增大,裂隙加快地基固结的速率明显.
[Abstract]:Based on the analysis of fracture permeability and the vacuum preloading negative pressure boundary condition, a consolidation behavior analysis model of split vacuum method is established, and the influence of fracture location and fracture permeability on the consolidation of foundation is analyzed by using the theoretical model. The results show that the settlement calculated by the theoretical consolidation model is in agreement with the results of the laboratory model test, and the consolidation rate of the soil is accelerated by the fissures, and when the fractures are located at the depth of 2 / 3 of the foundation, the consolidation rate of the foundation is increased most significantly by the fissures. With the increase of fissure permeability, the consolidation rate of foundation accelerates. When the fissure reaches the complete drainage boundary, the consolidation rate stops to increase, and with the increase of the ratio of soil thickness to the influence radius of sand well, the consolidation rate of fissures accelerates obviously.
【作者单位】：福州大学土木工程学院;江苏城乡建设职业学院;东南大学交通学院;
【基金】：国家自然基金资助项目(51078083)
【分类号】：TU447

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