基于数字图像相关技术的膨胀土三维裂隙扩展特性研究

doi:10.16285/j.rsm.2023.1587

岩土力学 ›› 2024, Vol. 45 ›› Issue (S1): 309-323.doi: 10.16285/j.rsm.2023.1587

基于数字图像相关技术的膨胀土三维裂隙扩展特性研究

张红日^{1, 2}，杨济铭^{1, 3}，徐永福²，肖杰⁴，韩仲⁵，汪磊⁶，林宇亮⁷

1. 广西交科集团有限公司，广西南宁 530007；2. 上海交通大学土木工程系，上海 200240；3. 中山大学土木工程学院，广东珠海 519082；4. 长沙理工大学交通运输工程学院，湖南长沙 410114；5. 武汉大学土木建筑工程学院，湖北武汉 430072； 6. 上海工程技术大学城市轨道交通学院，上海 201620；7. 中南大学土木工程学院，湖南长沙 410075

收稿日期:2023-10-24 接受日期:2024-02-05 出版日期:2024-09-18 发布日期:2024-09-19
作者简介:张红日，男，1983年生，博士，博士后，正高级工程师，主要从事岩土工程及特殊路基的研究。E-mail: 253541461@qq.com
基金资助:
国家自然科学基金（No.42477143）；广西重点研发计划（No.桂科AB23075184，No.桂科AB24010144）；国家重点研发计划项目（No.2019YFC1509800）；2023年崇左市科技计划项目-中央引导地方科技发展专项项目（No.崇科2023ZY0504）；交通部2022年度交通运输行业重点科技项目清单（No.2022-MS5-125）。

Study on three-dimensional crack propagation characteristics of expansive soil based on digital image correlation technology

ZHANG Hong-ri^{1, 2}, YANG Ji-ming^{1, 3}, XU Yong-fu², XIAO Jie⁴, HAN Zhong⁵, WANG Lei⁶, LIN Yu-xiang⁷

1. Guangxi Transportation Science and Technology Group Co., Ltd., Nanning, Guangxi 530007, China; 2. Department of Civil Engineering, Shanghai JiaoTong University, Shanghai 200240, China; 3. School of Civil Engineering, Sun Yat-sen University, Zhuhai, Guangdong 519082, China; 4. School of Transportation Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China; 5. School of Civil Engineering, Wuhan University, Wuhan, Hubei 430072, China; 6. School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China; 7. School of Civil Engineering, Central South University, Changsha, Hunan 410075

Received:2023-10-24 Accepted:2024-02-05 Online:2024-09-18 Published:2024-09-19
Supported by:
This work was supported by the National Natural Science Foundation of China (42477143), the Key R&D Program of Guangxi (AB23075184, AB24010144), the National Key Research and Development Project of China (2019YFC1509800), the 2023th Chongzuo City Science and Technology Plan Project - Centrally Guided Local Science and Technology Development Special Project (2023ZY0504) and the Key Technologies R&D Program of the Ministry of Transport (2022-MS5-125).

摘要/Abstract

摘要： 为探究膨胀土三维裂隙动态扩展特性及机制，搭建恒温恒湿环境箱，通过双目相机实时采集4、8、16 mm厚度下矩形和圆形膨胀土裂隙图像，基于三维数字图像相关技术重建裂隙三维形态，量化裂隙扩展机制和发育特性。结果表明：三维裂隙动态拓展特征方面，土体开裂时存在时空各异的收缩中心，收缩中心的数量随着试样厚度的增加而减少，收缩中心数量越多，裂隙网络形态越复杂；收缩中心运动形式呈纵向沉降，沉降量与裂隙土块含水率相关；裂隙土块周围颗粒运动矢量呈碗状朝收缩中心运动。各收缩中心空间分布存在差异，土体收缩时产生剪切应力，部分裂隙发育方向发生偏转，导致裂隙网络衔接呈多样性。膨胀土开裂过程中往往伴随着裂隙土块的翘曲，裂隙土块翘曲形成及运动机制如下：裂隙土块发育形成后，土块整体呈现“外干内湿”湿度差，随之产生的剖面基质吸力差引起了垂直方向收缩变形梯度，进而产生驱动裂隙土块上凹的曲卷力矩并朝着收缩中心聚拢，促使土块翘曲形成。该试验和分析结果可以为膨胀土裂隙发育规律认知、分析和预测方法提供参考。

关键词: 膨胀土, 裂隙三维动态拓展, 三维数字图像相关技术, 干燥翘曲

Abstract: To investigate the dynamic expansion characteristics and mechanism of three-dimensional cracks in expansive soil, a constant temperature and humidity environment box was constructed. The real-time images of rectangular and circular expansive soil cracks with thicknesses of 4 mm, 8 mm, and 16 mm were captured using binocular cameras. The three-dimensional shapes of the cracks were reconstructed using three-dimensional digital image correlation (3D-DIC) technology, and the expansion mechanism and development characteristics of the cracks were quantified. The results show that shrinkage centers vary in time and space when expansive soil cracks, and the number of shrinkage centers decreases with the increase of sample thickness. More shrinkage centers result in more complex crack network shape. The movement of the shrinkage center shows vertical settlement, and the settlement is related to the moisture content of the cracked soil block. The motion vectors of surrounding soil particles move towards the shrinkage center in a bowl shape. The uneven deformation of the soil surface varies with the spatial distribution of the shrinkage centers, causing shear stress and deflection in the development direction of some cracks, resulting in a diverse fracture network connection. The cracking process of expansive soil is accompanied by the curling of the cracked soil block. Regarding the formation and movement mechanism of the curling of cracked soil block, after the development and formation, the overall humidity difference is “dry outside and wet inside”. The resulting suction difference in the profile matrix causes a vertical contraction deformation gradient. The gradient generates a bending moment that drives the cracked soil block to sag and gathers towards the contraction center, promoting the curling formation of the soil block. The test and analysis results can provide references for the cognition, analysis and prediction methods of expansive soil crack development law.

Key words: expansive soil, three-dimensional dynamic expansion of cracks, three-dimensional digital image correlation technology, drying induced curling

中图分类号: TU443

张红日, 杨济铭, 徐永福, 肖杰, 韩仲, 汪磊, 林宇亮, . 基于数字图像相关技术的膨胀土三维裂隙扩展特性研究[J]. 岩土力学, 2024, 45(S1): 309-323.

ZHANG Hong-ri, YANG Ji-ming, XU Yong-fu, XIAO Jie, HAN Zhong, WANG Lei, LIN Yu-xiang, . Study on three-dimensional crack propagation characteristics of expansive soil based on digital image correlation technology[J]. Rock and Soil Mechanics, 2024, 45(S1): 309-323.

参考文献

相关文章 15

[1]	姜海波, 卢燕, 李琳, 张军, . 干湿-冻融作用输水渠道膨胀土强度特性及损伤演化规律研究[J]. 岩土力学, 2025, 46(5): 1356-1367.
[2]	欧阳淼, 张红日, 王桂尧, 邓人睿, 郭鸥, 汪磊, 高游, . 基于响应面法的生物基质改良膨胀土配比优化研究[J]. 岩土力学, 2025, 46(5): 1368-1378.
[3]	郑舒文, 刘松玉, 李迪, 童立元, 吴恺, . 膨胀土基泡沫轻质土力学性能试验研究[J]. 岩土力学, 2025, 46(5): 1455-1465.
[4]	周振华, 孔令伟, 李甜果, 舒荣军, . 原状膨胀土裂隙演变性状的环境效应与表征[J]. 岩土力学, 2025, 46(2): 402-412.
[5]	陈熠坤, 储亚, 蔡国军, 闫超, 刘松玉, 韩爱民, . 基于低频电法的原位膨胀土膨胀性评价应用研究[J]. 岩土力学, 2025, 46(1): 147-155.
[6]	郭建华, 王汉辉, 李世昌, 戴张俊, . 干湿环境下膨胀土裂隙演化规律及渠坡变形研究[J]. 岩土力学, 2024, 45(S1): 433-442.
[7]	黎宇, 胡明鉴, 郑思维, 王志兵, . 电石渣-矿渣固化膨胀土强度及微观机制研究[J]. 岩土力学, 2024, 45(S1): 461-470.
[8]	魏星, 陈睿, 程世涛, 朱明, 王子健, . 成都膨胀土地区深基坑降雨稳定性分析与变形预测[J]. 岩土力学, 2024, 45(S1): 525-534.
[9]	马田田, 于海文, 韦昌富, 伊盼盼, 姚传芹, . 物理化学效应对膨胀土收缩特性的影响机制[J]. 岩土力学, 2024, 45(3): 697-704.
[10]	张勇敢, 鲁洋, 刘斯宏, 田金博, 张思钰, 方斌昕. 土工袋抑制膨胀土冻胀性能试验及机制探讨[J]. 岩土力学, 2024, 45(3): 759-768.
[11]	胡江, 李星, . 深挖方膨胀土边坡时空变形特征分析[J]. 岩土力学, 2024, 45(10): 3071-3080.
[12]	罗晓倩, 孔令伟, 鄢俊彪, 高志傲, 田升奎, . 不同饱和度下膨胀土原位孔内剪切试验及强度响应特征[J]. 岩土力学, 2024, 45(1): 153-163.
[13]	高志傲, 孔令伟, 王双娇, 刘炳恒, 芦剑锋, . 平面应变条件下不同裂隙方向原状膨胀土变形破坏性状与剪切带演化特征[J]. 岩土力学, 2023, 44(9): 2495-2508.
[14]	邹维列, 樊科伟, 张攀, 韩仲, . 土工泡沫减压膨胀土挡墙侧向压力及影响因素分析[J]. 岩土力学, 2023, 44(9): 2537-2544.
[15]	曾召田, 崔哲旗, 孙德安, 姚志, 潘斌, . 南宁膨胀土持水性能的温度效应及微观机制[J]. 岩土力学, 2023, 44(8): 2177-2185.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

基于数字图像相关技术的膨胀土三维裂隙扩展特性研究

Study on three-dimensional crack propagation characteristics of expansive soil based on digital image correlation technology

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0