| 成层软黏土地基的固结沉降计算分析 |
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| 引用本文： | 周健,周凯敏,贾敏才,史旦达.成层软黏土地基的固结沉降计算分析[J].岩土力学,2010,31(3):789-793. |
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| 作者姓名： | 周健 周凯敏 贾敏才 史旦达 |
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| 作者单位： | 1. 同济大学,地下建筑与工程系,上海,200092,同济大学,岩土及地下工程教育部重点实验室,上海,200092
2. 上海海事大学,海洋环境与工程学院,上海,200135 |
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| 基金项目： | 上海市重点学科建设资助项目 |
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| 摘 要： | 针对实际工程中软黏土地基的成层特性及竖井有时并未打穿软土层情况，采用太沙基一维固结理论和巴伦固结理论的基本假定，利用固结度联系孔压与变形，提出一种简化成层软黏土地基的固结沉降计算方法，对竖向排水地基的固结度及沉降等进行预测。对计算的几个关键问题进行探讨：如固结系数的反演选择、竖井未打穿土层时，竖井底部成层地基固结度计算、压缩土层厚度选取等问题。在上述理论的基础上，用FORTRAN语言编写排水竖井固结程序CONSOL，在工程实践中得到应用，取得良好的效果。
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| 关 键 词： | 成层地基 固结沉降 反演 沉降预测 堆载预压 |
| 收稿时间： | 2008-11-19 |
Analysis of consolidation settlement calculation for layered soft clay |
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| ZHOU Jian,ZHOU Kai-min,JIA Min-cai,SHI Dan-da.Analysis of consolidation settlement calculation for layered soft clay[J].Rock and Soil Mechanics,2010,31(3):789-793. |
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| Authors: | ZHOU Jian ZHOU Kai-min JIA Min-cai SHI Dan-da |
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| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. College of Ocean Environment and Engineering, Shanghai Maritime University, Shanghai 200135, China |
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| Abstract: | In engineering practice, the subsoil with vertical drains is often composed of multi-layer strata, and the subsoil is partially penetrated by vertical drain wells. Based on basic hypotheses of Terzaghi’s one-dimensional consolidation theory and Barron’s consolidation theory, a simplified consolidation calculation method for the layered ground with vertical drains is presented. By connecting the pore pressure with deformation, the consolidation degree and the ground settlement with vertical drains can be predicted. In addition, some key problems in the process of the calculation are analyzed, such as the inverse analysis of the consolidation coefficient, the consolidation calculation when the drain wells partially penetrate the subsoil, the selection of thickness of the compressive soils, and so on. The consolidation procedure CONSOL via FORTRAN language is compiled. And it is verified that the method is applicable to engineering practice. |
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| Keywords: | layered soils consolidation settlement back analysis settlement prediction surcharge preloading |
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