基于土水特征试验估算重塑黏性土的缩限

doi:10.13722/j.cnki.jrme.2021.1013

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (629 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要当SSCC的残余收缩阶段不可忽略时，常规方法(计算法和图解法)难以估算缩限的准确值。以重塑黏性土为研究对象，利用土水特征曲线(SWCC)和土的收缩特征曲线(SSCC)探究土体缩限的确定方法。研究结果表明，基于数形结合的思想，提出正确估算重塑黏性土缩限的简单方法，该方法不需要完整的收缩曲线，仅需2个主要参数，即进气值含水率和试样在完全干燥时的体变。通过室内试验和文献中的试验数据，证实所提方法的准确性和适用性；当SSCC的残余阶段可忽略时，所推导的缩限公式与规范在本质上是一致的，但形式更加简单，该公式具有明确的物理意义，结合常规的SWCC试验数据，还可预测重塑黏性土的SSCC及其基于饱和度的SWCC，且预测曲线与试验数据具有良好的一致性。研究结果对黏性土地基的变形计算以及膨胀土胀缩等级的判别具有一定的理论意义和参考价值。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	叶云雪1
	2
	3
	韩仲2
	邹维列2
	王东星2
	吴珺华1
	3

关键词 ：土力学, 黏性土, 土水特征曲线, 土的收缩特征曲线, 缩限, 变形

Abstract：It is difficult to estimate the accurate value of the shrinkage limit by conventional methods(i.e.，calculation method and graphic method) when the residual shrinkage stage of SSCC cannot be negligible. The soil-water characteristic curve(SWCC) and the soil shrinkage characteristic curve(SSCC) are applied to explore the method of determining the shrinkage limit of remolded clay in the present study. The results show that a simple method for correctly estimating the shrinkage limit of remolded clay is proposed based on the idea of combining numbers and shapes. This method does not require a complete shrinkage curve，but only requires two main parameters，namely the water content corresponding to the air entry value and the volume change when the sample is completely dried. The accuracy and applicability of the proposed method are verified by using experimental data from both laboratory and literature available. When the residual shrinkage phase of SSCC can be neglected，the shrinkage limit formula deduced in this study is essentially consistent with the specification，but the former is simpler and has a clear physical meaning. Combined with conventional SWCC experimental data，the formula can also be employed to predict the SSCC of remolded clay and its SWCC based on degree of saturation. The predicted curve is in good agreement with the experimental data. These findings are very important for the subgrade deformation calculation of cohesive soil，as well as the identification of the expansion and shrinkage grade of expansive soil.

Key words： soil mechanics cohesive soil soil-water characteristic curve soil shrinkage characteristic curve shrinkage limit deformation

引用本文:

叶云雪1，2，3，韩仲2，邹维列2，王东星2，吴珺华1，3. 基于土水特征试验估算重塑黏性土的缩限[J]. 岩石力学与工程学报, 2022, 41(S2): 3380-3389.
YE Yunxue1，2，3，HAN Zhong2，ZOU Weilie2，WANG Dongxing2，WU Junhua1，3. Estimating the shrinkage limit of remolded cohesive soil based on soil-water characteristics. , 2022, 41(S2): 3380-3389.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.1013 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/IS2/3380

[15]	GROENEVELT P H，GRANT C D. Analysis of soil shrinkage data[J]. Soil and Tillage Research，2004，79(1)：71–77.
[18]	孙德安，高游. 不同制样方法非饱和土的持水特性研究[J]. 岩土工程学报，2015，37(1)：91–97.(SUN De?an，GAO You. Water retention behaviour of soils with different preparations[J]. Chinese Journal of Geotechnical Engineering，2015，37(1)：91–97.(in Chinese))
[1]	刘宽，叶万军，高海军，等. 干湿环境下膨胀土力学性能劣化的多尺度效应[J]. 岩石力学与工程学报，2020，39(10)：2 148–2 159. (LIU Kuan，YE Wanjun，GAO Haijun，et al. Multi-scale effects of mechanical property degradation of expansive soils under drying- wetting environments[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(10)：2 148–2 159.(in Chinese))
[3]	韩华强，陈生水，郑澄锋. 非饱和膨胀土强度及变形特性试验研究[J]. 岩土工程学报，2008，30(12)：1 872–1 876.(HAN Huaqiang，CHEN Shengshui，ZHENG Chengfeng. Experimental study on strength and deformation of unsaturated expansive soils[J]. Chinese Journal of Geotechnical Engineering，2008，30(12)：1 872–1 876.(in Chinese))
[5]	黄卫，钟理，钱振东. 路基膨胀土胀缩等级的模糊评判[J]. 岩土工程学报，1999，21(4)：408–413.(HUANG Wei，ZHANG Li，QIAN Zhendong. Fuzzy judgment about the grade of shrink and expansion for the expansive soil in the subgrade[J]. Chinese Journal of Geotechnical Engineering，1999，21(4)：408–413.(in Chinese))
[7]	姚海林，程平，吴万平. 基于收缩试验的膨胀土地基变形预测方法[J]. 岩土力学，2004，25(11)：1 688–1 692.(YAO Hailin，CHENG Ping，WU Wanping. A simplified method for predicted heave in expansive soil grounds based on three dimensional shrinkage tests[J]. Rock and Soil Mechanics，2004，25(11)：1 688–1 692.(in Chinese))
[2]	孔令伟，陈正汉. 特殊土与边坡技术发展综述[J]. 土木工程学报，2012，42(5)：141–161.(KONG Lingwei，CHEN Zhenghan. Advancement in the techniques for special soils and slopes[J]. China Civil Engineering Journal，2012，42(5)：141–161.(in Chinese))
[11]	CERATO A B，LUTENEGGER A J. Shrinkage of clays[C]// Proceedings of the 4th International Conference on Unsaturated Soils. Carefree，AZ，US：Geo-Institute of ASCE，2006：1 097–1 108.
[12]	叶云雪，邹维列，韩仲，等. 非饱和土孔隙比与基质吸力关系的通用模型[J]. 岩土工程学报，2019，41(5)：927–933.(YE Yunxue，ZOU Weilie，HAN Zhong，et al. General model for relationship between void ratio and matric suction in unsaturated soils[J]. Chinese Journal of Geotechnical Engineering，2019，41(5)：927–933.(in Chinese))
[14]	辛志宇，谭晓慧，胡娜，等. 膨胀土胀缩性指标的试验研究及变异性分析[J]. 广西大学学报：自然科学版，2014，39(1)：124–131. (XIN Zhiyu，TAN Xiaohui，HU Na，et al. Experimental study and variability analysis of swell-shrinkage indices of expansive soil[J]. Journal of Guangxi University：Natural Science，2014，39(1)：124–131.(in Chinese))
[16]	MBONIMPA M，AUBERTIN M，BUSSIERE B，et al. A new equation for the suction induced shrinkage of clayey soils[C]// Proceedings of the 6th Joint IAH-CNC and CGS Groundwater Speciality Conference，58th Canadian Geotechnical Conference. Saskatoon，Saskatchewan，Canada：[s. n.]，2005：18–21.
[22]	PRAKASH K，SWAROOP H M. A simplified approach of determining the specific gravity of soil solids[J]. Geotechnical and Geological Engineering，2012，30(4)：1 063–1 067.
[23]	PASHA A Y，KHOSHGHALB A，KHALILI N. Pitfalls in interpretation of gravimetric water content-based soil-water characteristic curve for deformable porous media[J]. International Journal of Geomechanics，2016，16(6)：D4015004.
[25]	FREDLUND D G，XING A. Equations for the soil-water characteristic curve[J]. Canadian Geotechnical Journal，1994，31(4)：521–532.
[27]	唐朝生，崔玉军，TANG ANH-MINH，等. 土体干燥过程中的体积收缩变形特征[J]. 岩土工程学报，2011，33(8)：1 271–1 279.(TANG Chaosheng，CUI Yujun，TANG AnhMinh，et al. Volumetric shrinkage characteristics of soil during drying[J]. Chinese Journal of Geotechnical Engineering，2011，33(8)：1 271–1 279.(in Chinese))
[4]	范秋雁，梁昕，韩进仕. 非饱和膨胀岩饱和度及胀缩特性试验研究[J]. 岩石力学与工程学报，2020，39(1)：45–56.(FAN Qiuyan，LIANG Xin，HAN Jinshi. Experimental study on saturation and swelling-shrinkage characteristics of unsaturated expansive rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(1)：45–56.(in Chinese))
[6]	林玉山，凌泽民. 膨胀土胀缩性评价中有关问题的研究[J]. 工程地质学报，1998，6(3)：264–268.(LIN Yushan，LING Zemin. Some problems in assessment of swelling and shrinkage potential of expansive soils[J]. Journal of Engineering Geology，1998，6(3)：264–268.(in Chinese))
[8]	张虎元，谭煜，何东进，等. 石英砂掺量对膨润土–砂混合物泥浆样干缩开裂的控制机制[J]. 岩土工程学报，2019，41(2)：277–285. (ZHANG Huyuan，TAN Yu，HE Dongjin，et al. Influence mechanism of quartz sand content on drying shrinkage and crack of paste-like bentonite-sand mixtures as buffer/backfill materials[J]. Chinese Journal of Geotechnical Engineering，2019，41(2)：277–285.(in Chinese))
[19]	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)：81–88.(CAI Guoqing，WU Tianchi，WANG Yanan，et al. Model of the microstructure evolution of unsaturated compacted soils with double-pore structure[J]. Rock and Soil Mechanics，2020，41(11)：81–88.(in Chinese))
[9]	张华，陈守义，姚海林. 用收缩试验资料间接估算压力板试验中的体积含水量[J]. 岩土力学，1999，20(2)：22–26.(ZHANG Hua，CHEN Shouyi，YAO Hailin. Estimation of volumetric water content in the pressure plate test by use of shrinkage test data[J]. Rock and Soil Mechanics，1999，20(2)：22–26.(in Chinese))
[10]	中华人民共和国国家标准编写组. GB/T 50123—2019土工试验方法标准[S]. 北京：中国计划出版社，2019.(The National Standards Compilation Group of People?s Republic of China. GB/T 50123—2019 Standard for geotechnical testing method[S]. Beijing：China Planning Publishing House，2019.(in Chinese))
[17]	HOBBS P R N，JONES L D，KIRKHAM M P，et al. A new apparatus for determining the shrinkage limit of clay soils[J]. Geotechnique，2014，64：195–203.
[28]	FLEUREAU J M，KHEIRBEK-SAOUD S，SOEMITRO R，et al. Behavior of clayey soils on drying-wetting paths[J]. Canadian Geotechnical Journal，1993，30(2)：287–296.
[13]	柯尊敬. 对胀缩土缩限计算公式的修正及修正公式的应用[J]. 广西大学学报：自然科学版，1979，(1)：54–62.(KE Zunjing. Modification and application of calculation formula for shrinkage limit of swelling soils[J]. Journal of Guangxi University：Natural Science，1979，(1)：54–62.(in Chinese))
[20]	查晓琪，许冲，汪时机，等. 膨胀土土水特征曲线的覆土压力效应研究[J]. 岩石力学与工程学报，2020，39(增1)：3 067–3 075. WANG Xiaoqi，XU Chong，WANG Shiji，et al. Study on overburden pressureeffect of expansive soil water characteristic curve[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(Supp.1)： 3 067–3 075.(in Chinese))
[21]	赵贵涛，韩仲，邹维列，等. 干湿、冻融循环对膨胀土土–水及收缩特征的影响[J]. 岩土工程学报，2021，43(6)：1 139–1 146.(ZHAO Guitao，HAN Zhong，ZOU Weilie，et al. Evolution of soil-water and shrinkage characteristics of an expansive soil during drying-wetting- freeze-thaw cycles[J]. Chinese Journal of Geotechnical Engineering，2021，43(6)：1 139–1 146.(in Chinese))
[24]	FREDLUND D G，HOUSTON S L. Interpretation of soil-water characteristic curves when volume change occurs as soil suction is changed[C]// Proceedings of the Advances in Unsaturated Soils. Boca Raton：CRC Press，2013：15–31.
[26]	CORNELIS W M，CORLUY J，MEDINA H，et al. A simplified parametric model to describe the magnitude and geometry of soil shrinkage[J]. European Journal of Soil Science，2006，57：258–268.
[29]	CUNNINGHAM M R，RIDLEY A M，DINEEN K，et al. The mechanical behaviour of a reconstituted unsaturated silty clay[J]. Geotechnique，2003，53(2)：183–194.