Damage Evolution and Failure Mechanism of Red-Bed Rock under Drying–Wetting Cycles

岩土工程 脆性 岩体分类 材料科学 润湿 覆岩压力 工程类 复合材料
作者
Tao Wen,Yankun Wang,Huiming Tang,Junrong Zhang,Mingyi Hu
出处
期刊:Water [MDPI AG]
卷期号:15 (15): 2684-2684 被引量:10
标识
DOI:10.3390/w15152684
摘要

The rock mass on the bank slope of the Three Gorges Reservoir (TGR) area often suffers from a drying–wetting cycle (DWC). How the DWCs significantly affect the mechanical properties and the stability of the rock mass is worth comprehensively investigating. In this study, the influence of the DWC on the mechanical properties of red-bed rock, mainly purplish red argillaceous siltstone, is explored in detail. Triaxial compression tests were conducted on siltstones that were initially subjected to different DWCs. The results show that DWCs lead to a decrease in mechanical properties such as peak stress, residual stress, and elastic modulus, while an increase in confining pressure (CP) levels leads to an increase in these mechanical properties. Significant correlations are found between the energy parameters and the DWC or the CP. Notably, the total absorption energy (TAE) demonstrates a positive correlation with the CP, but the capability of siltstones to absorb energy shows a negative correlation with DWC. Moreover, the study also examines the damage evolution laws of rocks under different DWCs by proposing a damage variable (DV). Results demonstrate that the effect of the CP on the DV is more pronounced than that of DWCs. A novel brittleness index (BI) was also proposed for estimating rock brittleness through damage strain rate analysis. The effectiveness of the proposed BI is validated by evaluating the effects of DWCs and CP on rock brittleness. Finally, the failure mechanism of the rocks under water–rock interaction is revealed. The weakening of mechanical properties occurs due to the formation of microcracks in response to DWCs. These findings provide valuable guidance for the long-term stability assessment of bank slope engineering projects under DWCs.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
宋芽芽u完成签到 ,获得积分10
刚刚
刚刚
1秒前
喵小猫发布了新的文献求助10
1秒前
lvhuiqi完成签到,获得积分10
2秒前
2秒前
2秒前
汤圆完成签到,获得积分10
3秒前
3秒前
3秒前
Rye完成签到,获得积分10
3秒前
3秒前
3秒前
4秒前
NexusExplorer应助芒果椿采纳,获得10
4秒前
科研通AI5应助滴滴采纳,获得10
4秒前
Peter_Zhu完成签到,获得积分10
4秒前
4秒前
饱满一手完成签到 ,获得积分10
5秒前
oo发布了新的文献求助10
5秒前
三水完成签到,获得积分10
5秒前
lili发布了新的文献求助10
6秒前
阿小发布了新的文献求助10
6秒前
阳光棉花糖完成签到 ,获得积分10
6秒前
6秒前
6秒前
潜山耕之完成签到,获得积分10
7秒前
7秒前
HQQ发布了新的文献求助10
7秒前
7秒前
7秒前
月影发布了新的文献求助10
7秒前
9秒前
条鱼完成签到,获得积分10
9秒前
nakl完成签到,获得积分10
9秒前
冷静发布了新的文献求助10
9秒前
9秒前
Joseph_LIN完成签到,获得积分10
9秒前
10秒前
10秒前
高分求助中
Production Logging: Theoretical and Interpretive Elements 2700
Les Mantodea de Guyane Insecta, Polyneoptera 1000
Structural Load Modelling and Combination for Performance and Safety Evaluation 1000
Conference Record, IAS Annual Meeting 1977 820
England and the Discovery of America, 1481-1620 600
電気学会論文誌D(産業応用部門誌), 141 巻, 11 号 510
Exploring the effects of an evidenced-based professional development programme on teaching and learning in Chinese kindergartens 500
热门求助领域 (近24小时)
化学 材料科学 生物 医学 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 量子力学 光电子学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3575717
求助须知:如何正确求助?哪些是违规求助? 3145750
关于积分的说明 9462234
捐赠科研通 2847209
什么是DOI,文献DOI怎么找? 1565025
邀请新用户注册赠送积分活动 732773
科研通“疑难数据库(出版商)”最低求助积分说明 719324