| 钱塘江冲海积非饱和粉土剪胀性三轴试验研究 |
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| 引用本文： | 杨迎晓,龚晓南,范川,金兴平,陈华.钱塘江冲海积非饱和粉土剪胀性三轴试验研究[J].岩土力学,2011,32(Z1):38-42. |
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| 作者姓名： | 杨迎晓 龚晓南 范川 金兴平 陈华 |
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| 作者单位： | 浙江树人大学城建学院;浙江大学软弱土与环境土工教育部重点实验室;杭州市城市建设发展公司; |
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| 基金项目： | 浙江省科技计划项目(No.2008C33002) |
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| 摘 要： | 钱塘江两岸广泛分布着冲海积粉土。在对钱塘江饱和粉土三轴试验研究的基础上,采用常规三轴仪,通过对不同饱和度系列粉土的固结排水CD试验,探讨钱塘江非饱和粉土的应力-应变性状和剪胀特性。对稍密状态(e=0.871～0.969)粉土的试验表明:钱塘江冲海积非饱和粉土显著的特性之一是剪胀性,剪胀主要与粉土的饱和度和围压有关;饱和度对应力-应变曲线的一般形状影响不大;应力-应变曲线呈微软化型,残余强度qr与峰值强度qmax之比大多在0.9～1.0之间;粉土的剪胀随饱和度增高而增大,随围压增高而减小。临界状态体应变与中主应力随饱和度的变化有明显规律,围压800 kPa下,稍密状态钱塘江非饱和粉土体应变在εv=12.020 2-4.939 2lnp和εv=15.771 7-5.775 1lnp两条线所围的范围内,剪胀的最大体应变小于5%。
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| 关 键 词： | 非饱和粉土 三轴试验 应力-应变 体应变 剪胀性 |
| 收稿时间： | 2010-11-18 |
Triaxial testing study of dilatant characteristics of Qiantangjiang alluvial unsaturated silts |
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| YANG Ying-xiao,GONG Xiao-nan,FAN Chuan,JIN Xing-ping,CHEN Hua.Triaxial testing study of dilatant characteristics of Qiantangjiang alluvial unsaturated silts[J].Rock and Soil Mechanics,2011,32(Z1):38-42. |
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| Authors: | YANG Ying-xiao GONG Xiao-nan FAN Chuan JIN Xing-ping CHEN Hua |
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| Institution: | 1. Urban Construction College, Zhejiang Shuren University, Hangzhou 310015, China; 2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China;3. Hangzhou Urban Construction and Development Company, Hangzhou 310001, China |
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| Abstract: | Silt soils have been encountered in most of the estuary of Qiantangjiang.Based on the study of dilatant characteristic of Qiantangjiang alluvial saturated silts,general triaxial drainage tests of five groups of silts of different saturation degrees have been conducted to study the dilatancy of the unsaturated silts.The test results of the slightly dense silt show that one of the most significant properties of Qiantangjiang unsaturated silts is the dilatant characteristic;and that the amount of potential dil... |
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| Keywords: | unsaturated silt triaxial test stress-strain volumetric strain dilatancy |
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