[1]杨爱武,郑宇轩,肖敏.人工制备结构性软黏土长期变形特性试验研究[J].水文地质工程地质,2019,46(2):133.[doi:10.16030/j.cnki.issn.1000-3665.2019.02.18]
 YANG Aiwu,ZHENG Yuxuan,XIAO Min.An experimental study of the long-term deformation characteristics of artificial structured soft clay[J].Hydrogeology & Engineering Geology,2019,46(2):133.[doi:10.16030/j.cnki.issn.1000-3665.2019.02.18]
点击复制

人工制备结构性软黏土长期变形特性试验研究()
分享到:

《水文地质工程地质》[ISSN:1000-3665/CN:11-2202/P]

卷:
46卷
期数:
2019年2期
页码:
133
栏目:
工 程 地 质
出版日期:
2019-03-15

文章信息/Info

Title:
An experimental study of the long-term deformation characteristics of artificial structured soft clay
文章编号:
1000-3665(2019)02-0133-08
作者:
杨爱武12郑宇轩12肖敏12
1.天津城建大学土木工程学院,天津300384;2.天津市软土特性与工程环境重点实验室,天津300384
Author(s):
YANG Aiwu12 ZHENG Yuxuan12 XIAO Min12
1. School of Civil Engineering, Tianjin Chengjian University, Tianjin300384, China; 2. Key Laboratory of Soft Soil Engineering Characteristics and Engineering Environment of Tianjin, Tianjin300384, China
关键词:
软黏土结构屈服应力蠕变结构强度长期变形
Keywords:
soft clay structural yield stress creep structural strength long-term deformation
分类号:
TU411.8
DOI:
10.16030/j.cnki.issn.1000-3665.2019.02.18
摘要:
软黏土的结构性对其变形特性有很大的影响,由于成因等因素的不同,软黏土的结构性强弱不一,这也使得土体变形特性表现出差异性。为研究结构性强弱不同对软黏土长期变形特性的影响,人工制备含水率相同而结构强度不同的软黏土,对其进行三轴不固结不排水蠕变试验,研究结构性对软土长期变形特性的影响。试验结果分析表明,具有一定结构性的软黏土,当偏应力小于结构屈服应力时,土体结构损伤少,其蠕变变形量较小,一般不大于2%;而随着偏应力的增大,尤其是超过结构屈服应力时,土体结构出现大量破坏,应变增长很快,最终演变为临界型应变。相同偏应力作用下,土体结构性越强,各时刻的蠕变变形量也越小。在此基础上,以土体结构强度作为表征土体结构性强弱的量化参数,建立了考虑结构强度影响的长期变形预测公式。
Abstract:
The structure of soft clay has a great effect on its deformation characteristics, and it shows difference in strength as affected by such factors as origins, which also leads to some differences in the soil deformation characteristics. In order to examine the effect of structural strength on the long-term deformation characteristics of soft clay, creep tests under unconsolidated-undrained conditions were conducted for artificial soil with the same moisture content and different structural strengths. The results show that for soft clay with certain structure, when the deviatoric stress is less than the structural yielding stress, the soil structure has a small yield failure, and its creep deformation is small, generally less than 2%. With the increasing deviatoric stress, the soil structure appears lots of structural failure, especially when the structural yield stress is exceeded, and the strain develops quickly, eventually evolves into a critical strain. Under the same deviatoric stress, the stronger the soil structure, the smaller the creep deformation at any time. The soil structural strength is taken as a quantitative parameter, which represents the level of the soil structure and is used to establish a long-term deformation prediction model considering the influences of structure.

参考文献/References:

[1]王兴陈. 基于物理性质的土体强度和变形特性研究[D].杭州:浙江大学,2014.
[WANG X C. Study on properties of strength and deformation of soil based on physical characteristics[D]. Hangzhou: Zhejiang University,2014.(Chinese)]
[2]黄茂松,姚仰平,尹振宇,等. 土的基本特性及本构关系与强度理论[J]. 土木工程学报,2016,49(7):9-35.
[HUANG M S, YAO Y P, YIN Z Y, et al. An overview on elementary mechanical behaviors, constitutive modeling and failure criterion of soils[J].China Civil Engineering Journal, 2016,49(7):9-35. (Chinese)]
[3]〖JP3〗马杰. 软土结构性对土体力学特性的影响[J]. 土工基础,2015(1):62-65.
[MA J. The impact of soft clay sensitivity on the mechanical properties[J] Soil Engineering and Foundation,2015(1):62-65. (Chinese)]
[4]Chen Pan, Wei Chang-Fu, Li Yong-He. Compression deformation characteristics of structural clays[J].Rock and Soil Mechanics,2012,33(S2):29-36.
[5]成玉祥,杜东菊,李忠良.结构性吹填土剪切破坏的微结构效应[J].水文地质工程地质,2008,35(1):32-35.
[CHENG Y X, DU D J, LI Z L. Microstructural effects of shear failure of structural blow-filled soil[J]. Hydrogeology & Engineering Geology,2008,35(1):32-35. (Chinese)]
[6]Karim M R, Oka F, Krabbenhof K, et al. Simulation of long-term consolidation behavior of soft sensitive clay using an elasto-viscoplastic constitutive model[J].International Journal for Numerical and Analytical Methods in Geomechanics,2013,37(16):2801-2824.
[7]Jiangfeng Wang, Yongie Li, Yanbin Gao, et al. Experimental study on structural properties influencing on compressibility of soft clay[C]. Advances in Building Materials, Part 3, 2011:1767-1772.
[8]张先伟, 王常明. 软土结构性对次固结系数的影响[J]. 岩土力学, 2012,33(2):476-482.
[ZHANG X W, WANG C M. Effect of soft clay structure on secondary consolidation coefficient[J].Rock and Soil Mechanics,2012,33(2):476-482. (Chinese)]
[9]曾玲玲,曾俊,陈福全,等. 天然沉积结构性黏土的不排水强度性状[J]. 岩土工程学报,2014,36(6):1072-1078.
[ZENG L L, ZENG J, CHEN F Q, et al. Undrained shear strength behaviour of natural sedimentary structural clay[J].Chinese Journal of Geotechnical Engineering, 2014,36(6):1072-1078. (Chinese)]
[10]杨爱武,闫澍旺,张彦,等.吹填软土经验流变模型研究[J].水文地质工程地质,2012,39(5):54-58.
[YANG A W, YAN S W, ZHANG Y, et al. Experimental rheological model of blown-filled soft soil[J]. Hydrogeology & Engineering Geology, 2012,39(5):54-58. (Chinese)]
[11]罗开泰,聂青,张树祎,等. 人工制备初始应力各向异性结构性土方法探讨[J]. 岩土力学,2013,34(10):2815-2820.
[LUO K T, NIE Q, ZHANG S Y, et al. Investigation on artificially structured soils with initial stress-induced anisotropy[J].Rock and Soil Mechanics, 2013,34(10):2815-2820. (Chinese)]
[12]刘恩龙,罗开泰. 轴向循环加载条件下人工制备结构性土力学特性[J]. 北京工业大学学报,2012,38(2):180-185.
[LIU E L, LUO K T. Mechanical properties of artificially prepared structured soils subjected to axially cyclic loading[J].Journal of Beijing University of Technology, 2012,38(2):180-185. (Chinese)]
[13]杨爱武, 闫澍旺, 杜东菊. 考虑结构性影响的吹填软土流变历时特性研究[J]. 工业建筑, 2012, 42(6):106-111.
[YANG A W, YAN S W, DU D J. Study on rheological diachronicp property considering structural characteristics of soft dredger fill[J].Industrial Construction,2012,42(6): 106-111. (Chinese)]
[14]雷华阳,张文振,丁小冬,等. 考虑软土结构强度的次固结特性试验研究[J].岩土工程学报,2013,35(7):1221-1227.
[LEI H Y, ZHANG W Z, DING X D, et al. Experimental study on secondary consolidation considering structural strength of clay[J].Chinese Journal of Geotechnical Engineering,2013,35(7):1221-1227. (Chinese)]
[15]刘维正,瞿帅,章定文,等. 循环荷载下人工结构性土变形与强度特性试验研究[J]. 岩土力学,2015,36(6):1691-1697.
[LIU W Z, QU S, ZHANG D W, et al. Experimental study of behavior of deformation and strength of artificial structural soft clay under cyclic loading[J].Rock and Soil Mechanics,2015,36(6):1691-1697. (Chinese)]
[16]杨爱武,刘琦,闫澍旺,等. 结构性吹填软土流变等时曲线研究[J]. 煤田地质与勘探,2012,40(6):58-62.
[YANG A W, LIU Q, YAN S W. Rheological isochronous curve of the structural soft dredger fill[J]. Coal Geology & Exploration,2012,40(6):58-62. (Chinese)]
[17]杨爱武, 闫澍旺, 杜东菊. 结构性吹填软土蠕变模型研究[J]. 岩土力学,2012,33(11):3213-3218.
[YANG A W, YAN S W, DU D J. Study of creep model of structural soft dredger fill[J]. Rock and Soil Mechanics,2012,33(11): 3213-3218. (Chinese)]
[18]雷华阳,仇王维,丁小冬,等. 人工结构性土的次固结特性研究[J].天津大学学报(自然科学与工程技术版),2015,48(11):995-1000.
[LEI H Y, QIU W W, DING X D, et al. Characteristics of secondary consolidation considering the structure of artificial soil[J].Journal of Tianjin University(Science and Technology),2015,48(11): 995-1000. (Chinese)]
[19]王清,孔元元,张旭东,等.结构性土体固结压力的力学效应[J].西南交通大学报,2016,51(5):987-994.
[WANG Q, KONG Y Y, ZHANG X D, et al. Mechanical effect of pre-consolidation pressure of structural behavior soil[J]. Journal of Southwest Jiaotong University, 2016,51(5): 987-994. (Chinese)]
[20]王国欣,肖树芳,周旺高.原状结构性土先期固结压力及结构强度的确定[J].岩土工程学报,2003,25(2):249-251.
[WANG G X, XIAO S F, ZHOU W G. Determination of preconsolidation pressure and structural strength of undisturbed structural soils[J]. Chinese Journal of Geotechnical Engineering,2003,25(2):249-251. (Chinese)]

相似文献/References:

[1]杨爱武,闫澍旺,杜东菊,等.蠕变条件下吹填软土结构强度形成研究[J].水文地质工程地质,2011,38(6):62.
 YANG Ai-wu,YAN Shu-wang,DU Dong-ju.A study of the formation of structure yield stress subject to creep of the soft dredger fill[J].Hydrogeology & Engineering Geology,2011,38(2):62.
[2]杨爱武,胡垚,邓轩,等.基于静荷载作用软黏土动力长期变形预测研究[J].水文地质工程地质,2017,44(3):72.
 YANG Aiwu,HU Yao,DENG Xuan,et al.Prediction of long-term dynamic deformation of soft clay based on static load[J].Hydrogeology & Engineering Geology,2017,44(2):72.
[3]刘浩旭,朱剑锋,饶春义,等.盾构施工与波浪荷载耦合作用后软土力学特性[J].水文地质工程地质,2019,46(04):97.[doi:10.16030/j.cnki.issn.1000-3665.2019.04.13]
 LIU Haoxu,ZHU Jianfeng,RAO Chunyi,et al.Mechanical properties of soft clay after coupling between shield construction and wave loading[J].Hydrogeology & Engineering Geology,2019,46(2):97.[doi:10.16030/j.cnki.issn.1000-3665.2019.04.13]

备注/Memo

备注/Memo:
收稿日期: 2018-07-12; 修订日期: 2018-12-03
基金项目: 国家自然科学基金项目资助(41372291);天津市科技计划项目资助(15JCZDJC40600;15ZCZDSF00220)
第一作者: 杨爱武(1971-),男,教授,从事软黏土力学特性及土体微观结构研究。E-mail: tulilab@163.com
更新日期/Last Update: 2019-03-15