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浙江大学学报(工学版)
浙江大学学报(工学版)  2025, Vol. 59 Issue (11): 2361-2369    DOI: 10.3785/j.issn.1008-973X.2025.11.015
交通工程、土木工程     
干湿-冻融循环下地聚物固化风积沙力学特性
张凌凯1,2(),贾威1,2
1. 新疆农业大学 水利与土木工程学院，新疆 乌鲁木齐 830052
2. 新疆水利工程安全与水灾害防治重点实验室，新疆 乌鲁木齐 830052
Mechanical property of geopolymer solidified aeolian sand under dry-wet-freeze-thaw cycle
Lingkai ZHANG1,2(),Wei JIA1,2
1. College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
2. Xinjiang Key Laboratory of Water Conservancy Engineering Safety and Water Disaster Prevention, Urumqi 830052, China
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摘要：

为了探讨干湿-冻融循环条件下地聚物固化风积沙的力学特性劣化规律，开展干湿-冻融循环条件下的直剪、压缩、渗透和扫描电镜(SEM)试验. 研究表明，随着循环次数的增加，黏聚力、内摩擦角均呈二次函数的减小趋势. 抗剪强度参数劣化在微观的表征为脱离体面积比与孔隙面积比的增加. 随着循环次数的增加，压缩指数、回弹指数均呈二次函数的变化趋势. 压缩特性参数的损失率与脱离体面积比、孔隙面积比的相关性较高. 随着循环次数的增加，渗透系数呈增加的趋势，过程可以分为缓慢、迅速、稳定3个阶段. 孔隙面积比的增加促进了渗透系数的增加趋势，脱离体面积比的增加减缓了渗透系数的增加趋势.
关键词： 干湿-冻融循环;  固化风积沙;  剪切特性;  压缩特性;  渗透特性    
Abstract:

Direct shear, compression, penetration and scanning electron microscopy (SEM) tests were conducted under dry-wet-freeze-thaw cycles in order to analyze the degradation law of mechanical property of geopolymer solidified aeolian sand under dry-wet-freeze-thaw cycles. The cohesion and internal friction angle show a decreasing trend of quadratic function with the increase of the number of cycles. The deterioration of shear strength parameter is characterized by an increase in the detachment area ratio and the pore area ratio. The compression index and the rebound index show a quadratic function trend with the increase of the number of cycles. The loss rate of compression characteristic parameter is highly correlated with the detachment area ratio and pore area ratio. The permeability coefficient shows an increasing trend with the increase of the number of cycles. The process can be divided into three stages: slow, rapid and stable. The increase of pore area ratio promotes the increase of permeability coefficient, and the increase of detachment area ratio slows down the increase of permeability coefficient.
Key words: dry-wet-freeze-thaw cycle    solidified aeolian sand    shear property    compression characteristic    permeability characteristic
收稿日期: 2024-11-05 出版日期: 2025-10-30
:  TU 441  
基金资助: 2022年自治区重点研发任务专项资助项目（2022B03024-3）；新疆维吾尔自治区杰出青年科学基金资助项目（2022D01E45）；新疆维吾尔自治区中央引导地方科技发展资金资助项目（ZYYD2024CG20）.
作者简介: 张凌凯（1987—），男， 副教授，博士，从事环境岩土工程的研究. orcid.org/0000-0002-5290-5309. E-mail：xjau_zlk@163.com
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引用本文:

张凌凯,贾威. 干湿-冻融循环下地聚物固化风积沙力学特性[J]. 浙江大学学报(工学版), 2025, 59(11): 2361-2369.

Lingkai ZHANG,Wei JIA. Mechanical property of geopolymer solidified aeolian sand under dry-wet-freeze-thaw cycle. Journal of ZheJiang University (Engineering Science), 2025, 59(11): 2361-2369.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2025.11.015    或    https://www.zjujournals.com/eng/CN/Y2025/V59/I11/2361

图 1  风积沙、矿粉、粉煤灰颗粒级配曲线
图 2  粉煤灰、矿粉主要成分的分布
图 3  不同循环次数下固化风积沙的剪切特性变化曲线
图 4  不同循环次数下固化风积沙的微观图像
NA/%R/%QH
14.587.230.8351.53
316.7415.690.8231.55
521.4517.220.7731.47
722.1319.680.7941.48
928.3519.910.7881.41
表 1  不同循环次数下固化风积沙的微观参数
图 5  不同循环次数下固化风积沙单一微观参数与抗剪强度参数损失率的关系曲线
图 6  不同循环次数下固化风积沙双因素微观参数与抗剪强度参数损失率的变化曲面
图 7  不同循环次数下固化风积沙压缩特性的变化曲线
图 8  不同循环次数下固化风积沙压缩试验后的微观图像
NA/%R/%QH
16.294.420.8771.45
39.1210.710.8371.47
514.5811.030.8221.41
718.6312.380.8341.40
920.7112.940.8271.34
表 2  不同循环次数下固化风积沙经压缩试验后的微观参数
图 9  不同循环次数下固化风积沙单一微观参数与压缩特性参数损失率的关系曲线
图 10  不同循环次数下固化风积沙微观参数与压缩特性参数损失率的变化曲面
图 11  不同循环次数下固化风积沙渗透特性的变化曲线
图 12  不同循环次数下固化风积沙经过渗透试验后的微观图像
NA/%R/%QH
13.582.450.861.58
36.744.610.851.60
59.4513.780.801.53
713.1316.220.821.55
925.3516.860.791.45
表 3  不同循环次数下固化风积沙经过渗透试验后的微观参数
图 13  不同循环次数下固化风积沙微观参数与渗透系数损失率的变化曲线(面)
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