全吸力范围内固化土的土–水特征曲线试验研究

doi:10.13722/j.cnki.jrme.2022.0711

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (987 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要由于降雨–蒸发、水位升降等原因，固化土作为人工填土或路基材料等进行资源化利用时其含水率常处于周期性变化状态，对其持水特性的研究具有较强的理论和工程应用价值。目前有关固化土的土–水特征曲线(SWCC)的研究较少，尚未得到全吸力范围内统一、明确的固化土的土水特征曲线以及固化土的持水特性规律。采用压力板法、滤纸法、蒸汽平衡法3种试验方法，测量吸湿与脱湿2种不同路径下全吸力范围内固化土的土–水特征曲线。结合电镜扫描试验和压汞试验，对不同水泥掺量固化土的土–水特征曲线以及持水特性进行分析研究。试验结果表明：随着水泥掺量的增加，固化土的孔隙分布更加均匀，土颗粒之间大孔隙逐渐减少，孔隙体积变小，固化土的持水能力提高。固化土在脱湿与吸湿路径下的土–水特征曲线具有明显的滞回现象，随着水泥掺量的增加，水化产物增多，土颗粒团聚体表面粗糙度变大，固化土的滞回效应愈发明显。

	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
	桑进
	刘文化
	张洪勇
	林欣怡
	李吴刚

关键词 ：土力学, 土&ndash, 水特征曲线, 全吸力范围, 固化土, 滞回现象

Abstract：The water content of solidified soil often changes periodically when it is used as artificial fill or subgrade material for resource utilization due to the rainfall and evaporation，ground water level fluctuation and so on. Study on the water retention characteristics of solidified soil has theoretical and engineering application significance. There are few researches on soil-water characteristic curve(SWCC) of solidified soil，the unified and clear SWCC of solidified soil within the full suction range has not been obtained until now. The law of water retention of solidified soil is not clear yet. The SWCC of solidified soil in full suction range under drying path and wetting were measured by pressure plate method，filter paper method and vapor equilibrium technique. In combination with scanning electron microscope scanning test and mercury pressure test，the SWCC and the water retention characteristics of solidified soil with different cement contents were analyzed. The results show that the pore distribution of the solidified soil becomes more uniform with the increase of cement content. With the increase of cement content，the large pores between soil particles and the total pore volume gradually decrease，resulting in a higher water retention capacity of the solidified soil. The SWCCs of solidified soil under drying and wetting paths show significant hysteretic behavior. With the increase of cement content, the surface roughness of soil aggregates increases due to the increase of hydration products. The hysteresis of SWCC becomes more obvious with the increase of cement content.

Key words： soil mechanics soil-water characteristic curve(SWCC) full suction range solidified soil hysteresis

引用本文:

桑进，刘文化，张洪勇，林欣怡，李吴刚. 全吸力范围内固化土的土–水特征曲线试验研究[J]. 岩石力学与工程学报, 2023, 42(S1): 3842-3850.
SANG Jin，LIU Wenhua，ZHANG Hongyong，LIN Xinyi，LI Wugang. Experimental study of soil-water characteristic curve of solidified soil #br# in full suction range. , 2023, 42(S1): 3842-3850.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0711 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/IS1/3842

[20]	白福青，刘斯宏，袁骄. 滤纸总吸力吸湿曲线的率定试验[J]. 岩土力学，2011，32(8)：2 336-2 340.(BAI Fuqing，LIU Sihong，YUAN Jiao. Calibration test for total suction wetting curve of filter paper[J]. Rock and Soil Mechanics，2011，32(8)：2 336-2 340.(in Chinese))
[3]	SORBINO G，NICOTERA M V. Unsaturated soil mechanics in rainfall-induced flow landslides[J]. Engineering Geology，2013，165：105-132.
[22]	WENZEL R N. Resistance of solid surfaces to wetting by water[J]. Industrial and Engineering Chemistry，1936，28(8)：988-994.
[1]	MEEHL G A，TEBALDI C. More Intense，More frequent，and longer lasting heat waves in the 21st Century[J]. Science，2004，305(5686)：994-997.
[11]	张俊然，孙德安，姜彤. 吸力历史对非饱和弱膨胀土力学性质的影响[J]. 岩土力学，2015，36(11)：3 094-3 100.(ZHANG Junran，SUN Dean，JIANG Tong. Effect of suction history on mechanical behavior of unsaturated weakly-expansive soils[J]. Rock and Soil Mechanics，2015，36(11)：3 094-3 100.(in Chinese))
[21]	VAN G，TH M. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal，1980，44(5)：892-898.
[2]	石爱红，李国庆，丁德民，等. 考虑非饱和土基质吸力的丁家坡滑坡变形机制及稳定性评价[J]. 水文地质工程地质，2022，49(6)：141-151.(SHI Aihong，LI Guoqin，DING Demin，et al. Deformation mechanism and stability evaluation of Dingjiapo landslide considering unsaturated soil matric suction[J]. Hydrogeology Engineering Geology，2022，49(6)：141-151.(in Chinese))
[5]	SUN D A，GAO Y，ZHOU A，et al. Soil-water retention curves and microstructures of undisturbed and compacted Guilin lateritic clay[J]. Bulletin of Engineering Geology and the Environment，2016，75(2)：781-791.
[7]	朱赞成，孙德安，田进. 高吸力高温度下2种滤纸率定曲线及其应用[J]. 岩土工程学，2014，36(6)：1 020-1 027.(ZHU Zancheng，SUN Dean，TIAN Jin. Calibration curves of two filter papers at high suction and temperature and their application[J]. Chinese Journal of Geotechnical Engineering，2014，36(6)：1 020-1 027.(in Chinese))
[10]	NING L，KHORSHIDI M. Mechanisms for soil-water retention and hysteresis at high suction range[J]. Journal of Geotechnical and Geoenvironmental Engineering，2015，141(8)：1-10.
[12]	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)：1 839-1 846.(SUN Dean，ZHANG Junran，LV Haibo. Soil-water characteristic curve of Nanyang expansive soil in full suction range[J]. Rock and Soil Mechanics，2013，34(7)：1 839-1 846.(in Chinese))
[15]	KHOURY N. Moisture hysteretic behavior of fine-grained soils stabilized with lime and class C fly ash[J]. International Journal of Geomechanics，2019，19(9)：04019100.
[17]	黄伟，刘清秉，项伟，等. 离子固化剂改性蒙脱土吸附水特性及持水模型研究[J]. 岩土工程学报，2019，41(1)：121-130. (HUANG Wei，LIU Qingbing，XIANG Wei，et al. Water adsorption characteristics and water retention model for montmorillonite modified by ionic soil stabilizer[J]. Chinese Journal of Geotechnical Engineering，2019，41(1)：121-130.(in Chinese))
[13]	孙德安，何家浩，高游. 广吸力范围内压实红黏土的强度特性[J]. 岩土力学，2017，38(11)：51-56.(SUN Dean，HE Jiahao，GAO You. Strength characteristics of compacted lateritic clay in a wide range of suction[J]. Rock and Soil Mechanics，2017，38(11)：51-56.(in Chinese))
[23]	王晓东，彭晓峰，陆建峰，等. 接触角测试技术及粗糙表面上接触角的滞后性Ⅰ：接触角测试技术[J]. 应用基础与工程科学学报，2003，11(2)：174-184.(WANG Xiaodong，PENG Xiaofeng，LU Jianfeng，et al. Contact angle testing techniques and hysteresis of contact angle on rough surfaces Ⅰ：Contact angle testing technology[J]. Journal of Basic Science and Engineering，2003，11(2)：174-184.(in Chinese))
[4]	叶军. 降雨-蒸发循环作用下水泥改良黄土路基结构耐久性试验研究[硕士学位论文][D]. 兰州：兰州交通大学，2018.(YE Jun. Experimental study on durability of cement-modified loess subgrade structure under rainfall-evaporation cycle[M. S. Thesis][D]. Lanzhou：Lanzhou Jiaotong University，2018.(in Chinese))
[8]	王协群，邹维列，骆以道，等. 考虑压实度时的土水特征曲线和温度对吸力的影响[J]. 岩土工程学报，2011，33(3)：368-372.(WANG Xiequn，ZOU Weilie，LUO Yidao，et al. SWCCs and influence of temperature on matrix suction under different compaction degrees[J]. Chinese Journal of Geotechnical Engineering，2011，33(3)：368-372. (in Chinese))
[9]	褚峰，邵生俊，陈存礼. 干密度和竖向应力对原状非饱和黄土土水特征影响的试验研究[J]. 岩石力学与工程学报，2014，33(2)：413-420.(CHU Feng，SHAO Shengjun，CHEN Cunli. Experimental research on influence of dry density and vertical stress on soil-water characteristic curves of intact unsaturated loess[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(2)：413-420.(in Chinese))
[18]	HAERI S M，GARAKANI A A，ROOHPARVAR H R，et al. Testing and constitutive modeling of lime-stabilized collapsible loess. I：experimental investigations[J]. International Journal of Geomechanics，2019，19(4)：04 019 006.1-04 019 006.11.
[19]	JIANG X L，HUANG Z Y，MA F Q，et al. Analysis of strength development and soil-water characteristics of rice husk ash-lime stabilized soft soil[J]. Materials，2019，12(23)：3 873.
[6]	TANG A M，CUI Y J. Controlling suction by the Vapour equilibrium technique at different temperatures and its application in determining the water retention properties of MX80 clay[J]. Canadian Geotechnical Journal，2005，42(1)：287-296.
[16]	朱利君，裴向军，张晓超，等. 双聚材料改良黄土持水性及生态效应研究[J]. 水文地质工程地质，2020，47(4)：158-166.(ZHU Lijun，PEI Xiangjun，ZHANG Xiaochao，et al. A study of water retention and ecological effects of loess improved by double polymers[J]. Hydrogeology and Engineering Geology，2020，47(4)：158-166.(in Chinese))
[14]	MUHAMMAD N，SIDDIQUA S Z. Moisture-dependent resilient modulus of chemically treated subgrade soil[J]. Engineering Geology，2021，285(1)：106028.