基于孔径分布函数的单/双峰持水曲线模型
PDF下载 (140)傅宇晨,高 游*,李 泽.基于孔径分布函数的单/双峰持水曲线模型[J].宁波大学学报(理工版),2024,37(2):72-77.DOI:10.20098/j.cnki.1001-5132.2023.0308
FU Yuchen,GAO You,LI Ze.Unimodal/bimodal soil-water retention curve based on pore size distribution function[J].Journal of Ningbo University(Natural Science & Engineering Edition),2024,37(2):72-77.DOI:10.20098/j.cnki.1001-5132.2023.0308
| Title: | Unimodal/bimodal soil-water retention curve based on pore size distribution function |
| 作者: | 傅宇晨, 高 游*, 李 泽 |
| Author(s): | FU Yuchen, GAO You, LI Ze |
| 关键词: | 非饱和土; 单双峰; 持水曲线; 孔径分布 |
| Keywords: | unsaturated soil; single/double-peaked; soil-water retention curve; pore size distribution |
| 分类号: | TU43 |
| DOI: | 10.20098/j.cnki.1001-5132.2023.0308 |
| 文献标识码: | A |
| 摘要: | 非饱和土持水曲线是研究非饱和土强度、渗透性以及本构理论的基础. 目前大多数非饱和持水曲线模型主要针对单峰持水曲线, 而对于双峰持水曲线的模型研究相对较少. 本文通过分析单/双峰孔隙结构土体的孔径分布特征, 利用Young-Laplace方程建立土体吸力和孔径之间的关系, 再采用对数正态分布函数来描述土体单/双峰孔径分布特征. 在此基础上进一步提出了一个适用于模拟单/双峰持水曲线的模型, 模型中各参数均具有明确物理意义. 最后选取文献中不同类型土的持水实验数据对本模型进行验证, 结果表明, 新模型能较好地模拟不同类型土的单/双峰持水曲线. |
| Abstract: | The unsaturated soil water retention curve is the basis for studying the strength, permeability, and constitutive theory of unsaturated soil. Currently, most models for unsaturated soil-water retention curves (SWRC) are aimed at single-peaked SWRC, and there is relatively little research on double-peaked SWRC models. In this paper, by analyzing the pore size distribution characteristics of single/double-peaked pore structure soils and using the relationship between soil suction and pore size established by the Young-Laplace equation, the lognormal distribution function is used to describe the pore size distribution characteristics of single/double-peaked soils. A model whose parameters with a clear physical meaning is further proposed to simulate single/double-peaked SWRC. Finally, water retention test data from different types of soils in the literature were selected to verify the model, and the results showed that the model can simulate single/double-peaked SWRC of different types of soils well. |
| 参考文献 /References: | [1].FREDLUND D G, RAHARDJO H. Soil mechanics for unsaturated soils[M]. New York: John Wiley & Sons, 1993. [2].陈正汉, 郭楠. 非饱和土与特殊土力学及工程应用研究的新进展[J]. 岩土力学, 2019, 40(1):1-54. [3].黎澄生, 孔令伟, 柏巍, 等. 土-水特征曲线滞后阻塞模型[J]. 岩土力学, 2018, 39(2):598-604. [4].ZHOU J, YU J L. Influences affecting the soil-water characteristic curve[J]. Journal of Zhejiang University: Science A, 2005, 6(8):797-804. [5].刘樟荣, 叶为民, 崔玉军, 等. 基于微孔填充和毛细管凝聚理论的持水曲线模型[J]. 岩土力学, 2021, 42(6): 1549-1556. [6].CHEN L X, GHORBANI J, ZHANG C S, et al. A novel unified model for volumetric hardening and water retention in unsaturated soils[J]. Computers and Geotechnics, 2021, 140:104446. [7].FANG Q D, REN X W, ZHANG B, et al. A flexible soil-water characteristic curve model considering physical constraints of parameters[J]. Engineering Geology, 2022, 305:106717. [8].ZHOU A N, HUANG R Q, SHENG D C. Capillary water retention curve and shear strength of unsaturated soils[J]. Canadian Geotechnical Journal, 2016, 53(6):974-987. [9].TAYLOR O D S, WALSHIRE L A, BERRY W W. Reducing uncertainties and improving sand soil-water retention curve (SWRC) predictions for hazard screening analyses[J]. Canadian Geotechnical Journal, 2020, 57(10): 1518-1533. [10].OTALVARO I F, NETO M P C, DELAGE P, et al. Relationship between soil structure and water retention properties in a residual compacted soil[J]. Engineering Geology, 2016, 205:73-80. [11].蔡国庆, 吴天驰, 王亚南, 等. 双孔结构非饱和压实土微观结构演化模型[J]. 岩土力学, 2020, 41(11):3583- 3590. [12].DA COSTA M B A, CAVALCANTE A L B. Bimodal soil-water retention curve and k-function model using linear superposition[J]. International Journal of Geomechanics, 2021, 21(7):4021116. [13].CHEN R P , LIU P , LIU X M , et al. Pore-scale model for estimating the bimodal soil-water characteristic curve and hydraulic conductivity of compacted soils with different initial densities[J]. Engineering Geology, 2019, 260:105199. [14].林志强, 钱建固, 时振昊. 毛细-吸附作用下考虑孔隙比影响的单双峰土体持水曲线模型[J]. 岩土力学, 2021, 42(9):2499-2506. [15].FREDLUND D G, XING A Q. Equations for the soil-water characteristic curve[J]. Canadian Geotechnical Journal, 1994, 31(4):521-532. [16].孙德安, 汪健, 何家浩, 等. 原状扬州黏性土压缩特性与孔径分布[J]. 水文地质工程地质, 2020, 47(1):111-116. [17].LAKSHMIKANTHA M R, PRAT P C, LEDESMA A. Experimental evidence of size effect in soil cracking[J]. Canadian Geotechnical Journal, 2012, 49(3):264-284. [18].李达, 汪时机, 李贤, 等. 不同覆土压力下砂质黏性紫色土的土: 水特征曲线研究[J]. 岩土工程学报, 2021, 43(10):1950-1956. [19].孙德安, 高游, 刘文捷, 等. 红黏土的土水特性及其孔隙分布[J]. 岩土工程学报, 2015, 37(2):351-356. [20].叶为民, 唐益群, 崔玉军. 室内吸力量测与上海软土土水特征[J]. 岩土工程学报, 2005, 27(3):347-349. [21].贾宝新, 王荷, 周琳力, 等. 辽西风积土路基土水特征曲线试验研究[J]. 工程地质学报, 2018, 26(3):633-638. [22].孙德安, 张俊然, 吕海波. 全吸力范围南阳膨胀土的土: 水特征曲线[J]. 岩土力学, 2013, 34(7):1839-1846. [23].CAI G Q, ZHOU A N, LIU Y, et al. Soil water retention behavior and microstructure evolution of lateritic soil in the suction range of 0-286.7 MPa[J]. Acta Geotechnica, 2020, 15(12):3327-3341. [24].NG C W W, SADEGHI H, JAFARZADEH F. Compression and shear strength characteristics of compacted loess at high suctions[J]. Canadian Geotechnical Journal, 2017, 54(5):690-699. [25].PERDOMO C V, NOGUEIRA L C, MIGUEL M G, et al. Analysis of water retention in soil horizons of two open trenches on a slope of Serra do Mar, Brazil, susceptible to landslides[J]. MATEC Web of Conferences, 2021, 337: 3015. [26].SATYANAGA A, RAHARDJO H. Unsaturated shear strength of soil with bimodal soil-water characteristic curve[J]. Géotechnique, 2019, 69(9):828-832. [27].ZHANG L M, CHEN Q. Predicting bimodal soil-water characteristic curves[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2005, 131(5):666-670. |
| 备注/Memo: | 收稿日期: 2023−03−08. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（42272312）; 浙江省新苗人才计划项目（2022R405B076）. 第一作者: 傅宇晨, 硕士研究生, 主要研究方向: 非饱和土力学. E-mail: 1871224294@qq.com *通信作者: 高游, 副教授, 主要研究方向: 土力学. E-mail: gaoyou@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
