基于单轴压缩与CT扫描的矿渣固化土细观裂隙及损伤模型研究

doi:10.16552/j.cnki.issn1001-1625.2024.1338

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (4): 1495-1503.DOI: 10.16552/j.cnki.issn1001-1625.2024.1338

基于单轴压缩与CT扫描的矿渣固化土细观裂隙及损伤模型研究

安然^1,2, 蔡苏童¹, 张先伟³, 高浩东³, 姚淼⁴, 刘魁⁴

1.武汉科技大学城市建设学院,武汉 430065;
2.合肥工业大学土木与水利工程学院,合肥 230009;
3.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉 430071;
4.信电综合勘察设计研究院有限公司,西安 710001

收稿日期:2024-11-08 修订日期:2025-01-10 出版日期:2025-04-15 发布日期:2025-04-18
作者简介:安然(1992—),男,博士,副教授。主要从事工程渣土改性及力学行为多尺度研究。E-mail:anran@wust.edu.cn
基金资助:
国家自然科学基金(12102312,41972285);陕西省2024年重点研发计划(2024GH-YBXM-05)

Microscopic Cracks and Damage Model of Slag Stabilized Soil Based on Uniaxial Compression and CT Scanning

AN Ran^1,2, CAI Sutong¹, ZHANG Xianwei³, GAO Haodong³, YAO Miao⁴, LIU Kui⁴

1. College of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;
2. College of Civil Engineering, Hefei University of Technology, Hefei 230009, China;
3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;
4. China DK Comprehensive Engineering Investigate and Design Research Institute Co., Ltd., Xi’an 710001, China

Received:2024-11-08 Revised:2025-01-10 Published:2025-04-15 Online:2025-04-18

摘要/Abstract

摘要： 为探究荷载作用下矿渣固化土细观结构的演化特征,本文开展单轴压缩过程中的原位计算机断层(CT)扫描试验,结合图像处理与三维(3D)重构技术提取了二维(2D)/三维裂隙的量化信息,借助裂隙体积参数表征了细观结构损伤变量,最后建立了细观损伤模型对试样的应力-应变关系进行准确描述。结果表明:在单轴压缩荷载作用下,矿渣固化土的应力-应变曲线表现出明显的应变软化型特征,峰值应力为1.85 MPa;随轴向应变的增加,二维裂隙率和裂隙分布的离散程度不断提高;三维重构模型动态展现了矿渣固化土的开裂过程及主裂隙面的演化特征,三维裂隙率从初始的3.39%增加至破坏时的9.78%、其数值及裂隙连通度均与轴向应变呈对数型函数关系;试样的破坏伴随裂隙的萌发(ε=0%~0.2%)、快速扩展(ε=0.2%~1.5%)与基本稳定(ε=1.5%~2.0%)3个阶段;利用裂隙体积表征了结构损伤变量,由此建立的细观损伤模型形式较简单,参数易确定,且可准确预测矿渣固化土的应力-应变关系。研究结果可为矿渣固化土破坏机制的多尺度分析提供新视角。

关键词: 矿渣固化土, 裂隙, CT扫描, 应力-应变, 细观损伤模型

Abstract: In order to explore the evolution characteristics of the meso-structure of slag solidified soil under load, this paper carried out in-situ computed tomography (CT) scanning test during uniaxial compression. The quantitative information of fractures in 2D and 3D form was extracted by combining image processing and 3D reconstruction techniques. With the volume parameters of fractures, the structural damage variables of slag solidified soil were calculated accordingly. Subsequently, a microscopic damage model was established to quantitatively describe the stress-strain relationship of the samples. The results show that the stress-strain curves of slag solidified soil under uniaxial compression loading obviously presents characteristics strain-softening, with a peak stress of 1.85 MPa. With the increase of axial strain, the 2D porosity and the dispersion of fracture distribution increase continuously. The 3D reconstruction model dynamically reveals the cracking process and the evolution of the main fracture surface, and the 3D porosity increases from an initial 3.39% to 9.78% at failure. Both the 3D porosity and fracture connectivity exhibit an logarithmic function relationship with axial strain. The failure of the sample involves three distinct stages: fracture initiation (ε=0%~0.2%), rapid propagation (ε=0.2%~1.5%) and stabilization (ε=1.5%~2.0%). The mesoscopic damage model based on damage variables, which were deprived from fracture volumes, is simple in form, easy to determine parameters, and can accurately predict the stress-strain curves of slag solidified soil. This study provides a novel perspective for the multi-scale analysis of failure mechanism of slag solidified soil.

Key words: slag solidified soil, fracture, CT scanning, stress-strain, microscomic damage model

中图分类号:

TU431

安然, 蔡苏童, 张先伟, 高浩东, 姚淼, 刘魁. 基于单轴压缩与CT扫描的矿渣固化土细观裂隙及损伤模型研究[J]. 硅酸盐通报, 2025, 44(4): 1495-1503.

AN Ran, CAI Sutong, ZHANG Xianwei, GAO Haodong, YAO Miao, LIU Kui. Microscopic Cracks and Damage Model of Slag Stabilized Soil Based on Uniaxial Compression and CT Scanning[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(4): 1495-1503.

参考文献

[1] LIU W, ZHAO T S, ZHOU W, et al. Safety risk factors of metro tunnel construction in China: an integrated study with EFA and SEM[J]. Safety Science, 2018, 105: 98-113.
[2] 洪开荣, 冯欢欢. 近2年我国隧道及地下工程发展与思考(2019—2020年)[J]. 隧道建设(中英文), 2021, 41(8): 1259-1280.
HONG K R, FENG H H. Development and thinking of tunnels and underground engineering in China in recent 2 years(from 2019 to 2020)[J]. Tunnel Construction, 2021, 41(8): 1259-1280 (in Chinese).
[3] 郭卫社, 王百泉, 李沿宗, 等. 盾构渣土无害化处理、资源化利用现状与展望[J]. 隧道建设(中英文), 2020, 40(8): 1101-1112.
GUO W S, WANG B Q, LI Y Z, et al. Status quo and prospect of harmless disposal and reclamation of shield muck in China[J]. Tunnel Construction, 2020, 40(8): 1101-1112 (in Chinese).
[4] ZHANG J, LU S D, FENG T G, et al. Research on reuse of silty fine sand in backfill grouting material and optimization of backfill grouting material proportions[J]. Tunnelling and Underground Space Technology, 2022, 130: 104751.
[5] 朱瑜星, 卞怡, 闵凡路, 等. 地铁盾构渣土改良为流动化土进行应用试验研究[J]. 土木工程学报, 2020, 53(增刊1): 245-251.
ZHU Y X, BIAN Y, MIN F L, et al. Improvement of metro shield muck to controlled low-strength material[J]. China Civil Engineering Journal, 2020, 53(supplement 1): 245-251 (in Chinese).
[6] 马加骁, 闫楠, 白晓宇, 等. 不同物态配比碱渣-粉煤灰混合料强度特性[J]. 岩土工程学报, 2021, 43(5): 893-900.
MA J X, YAN N, BAI X Y, et al. Strength characteristics of soda residue-fly ash mixture with different proportions and phases[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(5): 893-900 (in Chinese).
[7] AMULYA S, RAVI SHANKAR A U, PRAVEEN M. Stabilisation of lithomargic clay using alkali activated fly ash and ground granulated blast furnace slag[J]. International Journal of Pavement Engineering, 2020, 21(9): 1114-1121.
[8] YANG D, XI Z Q, CHEN Q, et al. Mechanical properties of tunnel muck with fly-ash geopolymer[J]. Advances in Civil Engineering, 2020, 2020(1): 7247134.
[9] 杨振甲, 何猛, 吴杨, 等. 矿渣-粉煤灰地聚物固化淤泥力学性能和路用性能研究[J]. 硅酸盐通报, 2022, 41(2): 693-703+724.
YANG Z J, HE M, WU Y, et al. Mechanical properties and road performance of slag-fly ash geopolymer stabilized sludge[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(2): 693-703+724 (in Chinese).
[10] DUAN Y T, FENG X T, LI X, et al. Mesoscopic damage mechanism and a constitutive model of shale using in situ X-ray CT device[J]. Engineering Fracture Mechanics, 2022, 269: 108576.
[11] ZHAO Y R, SUN X H, WEN T D, et al. Micro-structural evolution of granite residual soil under external loading based on X-ray micro-computed tomography[J]. KSCE Journal of Civil Engineering, 2021, 25(8): 2836-2846.
[12] SUN X K, LI X, ZHENG B, et al. Study on the progressive fracturing in soil and rock mixture under uniaxial compression conditions by CT scanning[J]. Engineering Geology, 2020, 279: 105884.
[13] 安然, 陈欣, 张先伟, 等. 单轴加载过程中钢渣稳定土细观裂隙的动态演化特征[J]. 岩土力学, 2023, 44(增刊1): 300-308.
AN R, CHEN X, ZHANG X W, et al. Dynamic evolution characteristics of microscopic cracks in steel slag-stabilized soil under uniaxial loading[J]. Rock and Soil Mechanics, 2023, 44(supplement 1): 300-308 (in Chinese).
[14] 李术才, 李廷春, 王刚, 等. 单轴压缩作用下内置裂隙扩展的CT扫描试验[J]. 岩石力学与工程学报, 2007, 26(3): 484-492.
LI S C, LI T C, WANG G, et al. CT real-time scanning tests on rock specimens with artificial initial crack under uniaxial conditions[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(3): 484-492 (in Chinese).
[15] MENG Q S, WU K, ZHOU H R, et al. Mesoscopic damage evolution of coral reef limestone based on real-time CT scanning[J]. Engineering Geology, 2022, 307: 106781.
[16] 张逸超, 陈星伊, 陈旭升, 等. 单轴受压地质聚合物再生混凝土损伤特性及本构模型研究[J]. 硅酸盐通报, 2022, 41(10): 3608-3614.
ZHANG Y C, CHEN X Y, CHEN X S, et al. Damage characteristics and constitutive model of geopolymer recycled concrete under uniaxial compression[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(10): 3608-3614 (in Chinese).
[17] 中华人民共和国住房和城乡建设部. 土工试验方法标准: GB/T 50123—2019[S]. 北京: 中国计划出版社, 2019.
Ministry of Water Resources, People’s Republic of China. Geotechnical test method standard: GB/T 50123—2019[S]. Beijing: China Planning Press, 2019 (in Chinese).
[18] 李鑫, 卢玉东, 张晓周, 等. 基于X-ray CT的古土壤孔裂隙识别与表征[J]. 水土保持通报, 2018, 38(6): 224-230+239.
LI X, LU Y D, ZHANG X Z, et al. Pore-fissure identification and characterization of paleosol based on X-ray computed tomography[J]. Bulletin of Soil and Water Conservation, 2018, 38(6): 224-230+239 (in Chinese).
[19] 梁明纯, 苗胜军, 蔡美峰, 等. 考虑剪胀特性和峰后形态的岩石损伤本构模型[J]. 岩石力学与工程学报, 2021, 40(12): 2392-2401.
LIANG M C, MIAO S J, CAI M F, et al. A damage constitutive model of rock with consideration of dilatation and postpeak shape of the stress-strain curve[J]. Chinese Journal of Rock Mechanics and Engineering, 2021, 40(12): 2392-2401 (in Chinese).
[20] JEAN L. How to use damage mechanics[J]. Nuclear Engineering and Design, 1984, 80(2): 233-245.

基于单轴压缩与CT扫描的矿渣固化土细观裂隙及损伤模型研究

Microscopic Cracks and Damage Model of Slag Stabilized Soil Based on Uniaxial Compression and CT Scanning

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	陈建华, 戴自立. 干燥环境下膨润土-纤维改良固化土的裂隙发育特征和强度劣化机理研究[J]. 硅酸盐通报, 2025, 44(3): 1170-1181.
[2]	纪璐鑫, 马红瑞, 马哲洋, 王胜, 崔嘉铭, 巴明芳. 二次铝灰烧结渣料对高强混凝土力学性能和收缩性能的影响[J]. 硅酸盐通报, 2025, 44(1): 212-222.
[3]	汪学清, 李永超, 张雪瑞, 赵云猛, 姜雨枫. 轴压下含裂隙聚丙烯纤维混凝土裂纹扩展及损伤演化研究[J]. 硅酸盐通报, 2024, 43(7): 2404-2414.
[4]	郑建岚, 王雅思, 叶艳. 原状海砂对混凝土力学性能的影响[J]. 硅酸盐通报, 2024, 43(6): 2149-2156.
[5]	王海龙, 侯建华, 孙晓燕, 蔺喜强, 路兰. 3D打印混凝土抗碳化性能各向异性及成因分析[J]. 硅酸盐通报, 2024, 43(5): 1704-1712.
[6]	唐子祥, 杨淑雁, 高海海, 徐宁阳. 硫酸盐侵蚀和干湿、冻融循环下混凝土单轴受压损伤对比[J]. 硅酸盐通报, 2024, 43(2): 428-438.
[7]	贾毅, 赵强, 韦朝宽, 宋浩博, 李唐伟, 沈先桃. 聚丙烯纤维增强水泥基复合材料单轴拉伸损伤本构模型研究[J]. 硅酸盐通报, 2024, 43(11): 4061-4071.
[8]	郭聚坤, 曹芯芯, 马永明, 惠迎新, 黄亚娟, 沈丙尧. 道路用水泥-粉煤灰流态固化土宏观力学性能与细观行为研究[J]. 硅酸盐通报, 2024, 43(11): 4107-4118.
[9]	吴辉琴, 刘星池, 陈宇良. 碳纤维再生混凝土循环受压性能及本构关系研究[J]. 硅酸盐通报, 2023, 42(8): 2743-2753.
[10]	姜天华, 莫定聪, 万聪聪, 卢旭刚, 李素珠. 玄武岩橡胶混凝土基本力学性能及受压应力-应变曲线[J]. 硅酸盐通报, 2023, 42(11): 4063-4071.
[11]	万聪聪, 姜天华, 余意. 基于正交试验的聚丙烯泡沫混凝土基本力学性能研究[J]. 硅酸盐通报, 2023, 42(10): 3518-3529.
[12]	张继旺, 黄满锋, 苏仕参, 易金, 覃庆龙, 王磊. 高强珊瑚混凝土(HSCC)单轴受压性能试验研究[J]. 硅酸盐通报, 2022, 41(7): 2275-2282.
[13]	张清芳, 洪鹤轩, 沈璐. 湿筛混凝土动态受压力学性能及破坏形态细观数值模拟[J]. 硅酸盐通报, 2022, 41(7): 2283-2291.
[14]	王攀峰, 曹玉贵, 邓晓光, 李龙龙. 不同应变速率下橡胶混凝土损伤本构模型[J]. 硅酸盐通报, 2022, 41(6): 1912-1919.
[15]	曾志伟, 梁剑, 曾宇鑫, 余波. 轴压与偏压状态下混凝土损伤全过程声发射特征参数分析[J]. 硅酸盐通报, 2022, 41(5): 1599-1608.