| 竖井地基的粘弹—粘塑性固结及有限元解 |
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| 引用本文： | 谢洪涛,杨春和,陈晓平.竖井地基的粘弹—粘塑性固结及有限元解[J].岩土力学,2001,22(4):403-407. |
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| 作者姓名： | 谢洪涛 杨春和 陈晓平 |
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| 作者单位： | 中国科学院武汉岩土力学研究所 |
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| 基金项目： | 国家自然科学基金资助项目(编号:19972071,10072072)和中国科学院院长基金特别支持项目. |
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| 摘 要： | 用1个带双屈服面的粘弹-粘塑性模型来描述软土的流变性状，并结合Biot固结理论对软土地基的固结沉降进行有限元分析。对竖井预固结地基进行计算，以预压所产生的沉降量及所引起的附加有效应力分别大于设计载荷所引起的最终沉降量和附加应力为终止预压的依据，计算取得了合理结果。
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| 关 键 词： | 粘弹－粘塑性模型 双屈服面 Biot固结理论 固结度 沉降 软土 竖井地基 |
| 文章编号： | 1000-7598-(2001)04-0403-05 |
| 修稿时间： | 2001年7月12日 |
Viscoelastic-viscoplastic consolidation model and finite element analysis for vertical drains soft foundation |
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| XIE Hong -tao,YANG Chun-he,CHEN Xiao-ping.Viscoelastic-viscoplastic consolidation model and finite element analysis for vertical drains soft foundation[J].Rock and Soil Mechanics,2001,22(4):403-407. |
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| Authors: | XIE Hong -tao YANG Chun-he CHEN Xiao-ping |
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| Abstract: | A visco elastic-viscoplastic model with a double yield surface was introduced to simulate the rheologic properties of soft soil.Based on Biot's consolidation equation,a finite element program was presented to compute the settlement of a soft foundation,which was processed with vertical drains.When the additional effective stress and the settlement caused by preloading are bigger than designed values,we suppose that the preloading can be stopped in the calculation of the preconsolidation for vertical drains.The result of this research shows that this supposal is reasonable. |
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| Keywords: | viscoelastic-viscoplastic model double yield surface Biot's consolidation theory degree of consolidation |
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