|本期目录/Table of Contents|

[1]董金梅,朱华,黄春霞,等.改性粉土的破坏模式及应力-应变特性[J].南京工业大学学报(自然科学版),2015,37(03):74-78.[doi:10.3969/j.issn.1671-7627.2015.03.014]
 DONG Jinmei,ZHU Hua,HUANG Chunxia,et al.Failure mode and stress-strain characteristics of modified silt[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(03):74-78.[doi:10.3969/j.issn.1671-7627.2015.03.014]
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改性粉土的破坏模式及应力-应变特性()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年03期
页码:
74-78
栏目:
出版日期:
2015-05-30

文章信息/Info

Title:
Failure mode and stress-strain characteristics of modified silt
文章编号:
1671-7627(2015)03-0074-05
作者:
董金梅12朱华1黄春霞1沈震1赵津东1
1.南京工业大学 交通学院,江苏 南京 210009; 2.重庆交通大学 水利水运工程教育部重点实验室,重庆 400074
Author(s):
DONG Jinmei12ZHU Hua1HUANG Chunxia1SHEN Zhen1ZHAO Jindong1
1.College of Transportation Science & Engineering,Nanjing Tech University,Nanjing 210009,China; 2.Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education,Chongqing Jiaotong University,Chongqing 400074,China
关键词:
高分子材料改性粉土 三轴压缩试验 破坏模式 应力-应变曲线 抗剪强度
Keywords:
polymer material modified silty soil trixial compression experiments failure mode stress-strain curve shear strength
分类号:
TU43
DOI:
10.3969/j.issn.1671-7627.2015.03.014
文献标志码:
A
摘要:
研究高分子材料改性粉土的破坏模式及应力-应变特性,为解决粉土地区路基工程稳定和变形提供重要依据。通过对高分子材料改性粉土进行不固结不排水(UU)、固结不排水(CU)和固结排水(CD)三轴试验。结果表明:改性粉土的破坏模式在UU和CU试验中,主要为鼓胀型; 在CD试验中,破坏模式较为复杂,有压裂型、剪切型和V字形; 改性粉土具有结构性土体的特性,应力-应变曲线的类型取决于围压与屈服应力的关系。对比改性粉土与纯粉土3种试验条件下的抗剪强度指标,表明高分子材料对粉土具有很好的改性效果; 同时也表明排水与固结条件不同,改性粉土表现出的抗剪强度指标不同,为此工程稳定性分析中,参数的选取应该与实际的固结排水条件相对应。
Abstract:
The study on failure mode and stress-strain characteristics of polymer material modified silty soil could provide all animportant basis for solving the stability and deformation of roadbed projects in silty areas.The test results of triaxial research unconsolidation undrained/consolidated undrained/consolidation drainage(UU/CU/CD)on modified silty soil showed that: the mainly failure mode of modified silt in the UU and CU tests is bulging type; while in the CD test,the failure mode is more complex,called the fracture type,shear type and "V" type.The characteristics of modified silty soil were identical with the structure soil; meanwhile the stress-strain curve depended on the type of the confining pressure and the yield stress. By comparing shear strength indexes of modified silty soil with pure silty soil under triaxial conditions,the better effects were achieved by using polymer material to modify silty soil.Meanwhile,the shear strength indexes of modified silty soil were different under different drainage and consolidation conditions.Hence,when analying the stability of projects,the selection of indexes should be in agree ment with actual consolidation and drainage conditions.

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备注/Memo

备注/Memo:
收稿日期:2014-04-28
基金项目:国家自然科学基金(51108236,51108235); 水利水运工程教育部重点实验室国家内河航道整治工程技术研究中心开放基金(SLK2011A03)
作者简介:董金梅(1974—),女,山西太谷人,副教授,博士,主要研究方向为地基处理、岩土体改性加固,E-mail:djmnj802@163.com.
引用本文:董金梅,朱华,黄春霞,等.改性粉土的破坏模式及应力-应变特性[J].南京工业大学学报:自然科学版,2015,37(3):74-78..
更新日期/Last Update: 2015-05-20