| 卸载对软土伸长强度的影响分析 |
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| 引用本文： | 周健,王浩,蔡宏英.卸载对软土伸长强度的影响分析[J].同济大学学报(自然科学版),2002,30(11):1285-1289. |
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| 作者姓名： | 周健 王浩 蔡宏英 |
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| 作者单位： | 同济大学,地下建筑与工程系,上海,200092 |
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| 基金项目： | 国家自然科学基金(59738160)，上海市重点学科建设资助项目 |
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| 摘 要： | 基于Hvorslev强度理论，以卸荷前应力状态为基准，推导了软土等向卸载后，土体处于类似超压密状态时卸载土体强度与卸载前正常固结土强度之间的关系式；采用太沙基一维固结理论，编制了内嵌固结计算的修正剑桥模型程序，分析不同卸载量、不同卸载固结时间、不同卸载级数对强度的影响，从而提供了全面系统分析卸载对软土伸长强度影响的方法，计算结果与试验数据对比，表明分析方法具有良好的可信度。
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| 关 键 词： | 软粘土 卸载强度 伏斯列夫强度理论 太沙基一维固结理论 修正剑桥模型 土力学 |
| 文章编号： | 0253-374X(2002)11-1285-05 |
| 修稿时间： | 2001年12月19 |
Soft Soil Extension Strength Analysis under Unloading Conditions |
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| ZHOU Jian,WANG Hao,CAI Hong - ying.Soft Soil Extension Strength Analysis under Unloading Conditions[J].Journal of Tongji University(Natural Science),2002,30(11):1285-1289. |
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| Authors: | ZHOU Jian WANG Hao CAI Hong - ying |
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| Abstract: | In order to analyze the soft soil extension strength under unloading conditions, Hvorslev soil strength theory and Terzaghi one - dimensional consolidation theory are adopted. Based on "Hvorslev soil strength theory,the strength relation between normal consolidated soil and the respective over - consolidated soil is given in isotropic unloading state. By the program of embedded consolidation calculation and modified Cam-clay model,the soft soil strength in different unloading stresses,unloading time and unloading progression can be analyzed. Therefore, a rounded analysis method of soft soil strength under unloading conditions is given in this paper. The comparison of computer and labor result show that the analysis method is reliable. |
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| Keywords: | soft soil unloading strength Hvorslev soil strength theory Terzaghi one- dimensional consolidation theory modified Cam - clay model |
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