| 变荷载作用下轴对称饱和半空间均质地基Biot固结分析 |
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| 引用本文： | 耿雪玉,蔡袁强.变荷载作用下轴对称饱和半空间均质地基Biot固结分析[J].岩土力学,2009,30(8):2264-2270. |
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| 作者姓名： | 耿雪玉 蔡袁强 |
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| 作者单位： | 1. 青岛理工大学土木工程学院,266033;浙江大学,软弱土与环境土工教育部重点实验室,310027
2. 浙江大学,软弱土与环境土工教育部重点实验室,310027 |
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| 摘 要： | 基于Biot固结理论,对随时间变化的变荷载作用下轴对称饱和半空间均质地基固结问题进行了分析.引入状态变量,利用Laplace-Haknel联合变换法,求解了状态方程,得到变荷载作用下饱和土骨架位移、应力、孔隙水压力及渗流量的一般积分形式解,通过算例详细分析了变荷载作用下二维地基固结问题.结果表明,对缓加荷载作用下地基,只有加载较快时,在地基较深处才有明显的Mandel-Cryer效应出现.在循环荷载作用下,多维固结情况下会出现负孔压现象.
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| 关 键 词： | 变荷载 半空间 固结 Mandel-Cryer效应 |
| 收稿时间： | 2008-01-07 |
Axisymmetric Biot consolidation of a semi-infinite isotropic saturated soil subjected to time-dependent loadings |
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| GENG Xue-yu,CAI Yuan-qiang.Axisymmetric Biot consolidation of a semi-infinite isotropic saturated soil subjected to time-dependent loadings[J].Rock and Soil Mechanics,2009,30(8):2264-2270. |
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| Authors: | GENG Xue-yu CAI Yuan-qiang |
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| Institution: | 1. School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China; 2. Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | Based on Biot’s consolidation theory, a semi-analytical solution to axisymmetric consolidation of a semi-infinite isotropic saturated soil subjected to time-dependent loadings is presented. By introducing state variable, using the method of Laplace-Hankel transform, the government can be solved. Through some numerical analytical example analysis, some consolidation behaviors in the time domain such as the fluid pressure and discharge are investigated. For the ramp loading case, the Mandel-Cryer effect can be seen when the construction time is little and under the deep of the foundation. For the cyclic loading, there is a negative pore pressure. |
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| Keywords: | time-dependent loading semi-infinite space consolidation Mandel-Cryer effect |
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