用透水反应型聚氨增强的花岩残余土壤的机械性能
Shuzhong Tan1, Jinyong Li2, Dingfeng Cao3
1Fujian Provincial Center for Transportation Construction Quality and Safety, Fuzhou 350001, China.
Polymers
|February 13, 2026
概括
透水反应型聚氨 (PWPU) 通过增强柔性和防止崩来稳定花岩残土 (GRS). 这种方法提高了机械强度,同时保持了重要的地下水排水,与传统的接方法不同.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 土壤力学 土壤力学
背景情况:
- 花岩残土 (GRS) 容易因水引起软化,导致坡道不稳定.
- 传统的不透接可以通过阻碍排水来加剧GRS危险.
- 需要稳定方法来增强机械性能,而不损害液压导电性.
研究的目的:
- 评估透性水反应型聚氨 (PWPU) 对稳定GRS的有效性.
- 研究PWPU对GRS.的机械行为和故障机制的影响.
- 在GRS稳定中解决机械增强和液压导电性之间的冲突.
主要方法:
- 在GRS上进行单轴压缩测试,含水和PWPU含量各不相同.
- 同步声辐射 (AE) 监测和数字图像相关性 (DIC) 用于故障机制分析.
- 扫描电子显微镜 (SEM) 用于微观结构的表征.
主要成果:
- PWPU处理显著增加了土壤的柔性,将故障从脆性转移到应变硬化,特别是在较高的水分含量下.
- 10%的最佳PWPU含量导致最大压力强度为4.5MPa.
- SEM证实了一个多孔的聚合物网络,可以将颗粒结合并保持透性.
- AE分析表明,拉力裂纹占故障事件的79.17%至96.35%.
结论:
- 通过形成灵活的微型增强网络,PWPU有效地稳定了GRS,提高了柔性和能量消耗.
- 最佳的PWPU剂量平衡了增强强度与保持透性的平衡.
- 同步的AE和DIC监测提供了对多规模故障机制的定量见解.
关键词:
声波发射 (AE) 是指声波的发射.数字图像相关性 (DIC) 是指数字图像相关性.石榴石残留土壤 (GRS) 是一种残留土壤.这是一个微观机制.透性水反应型聚氨 (PWPU) 是一种单轴压力强度 (UCS) 是指单轴的压力强度.更多相关视频
相关概念视频
Residuals and Least-Squares Property
9.5K
The vertical distance between the actual value of y and the estimated value of y. In other words, it measures the vertical distance between the actual data point and the predicted point on the line
If the observed data point lies above the line, the residual is positive, and the line underestimates the actual data value for y. If the observed data point lies below the line, the residual is negative, and the line overestimates the actual data value for y.
The process of fitting the best-fit...
If the observed data point lies above the line, the residual is positive, and the line underestimates the actual data value for y. If the observed data point lies below the line, the residual is negative, and the line overestimates the actual data value for y.
The process of fitting the best-fit...
9.5K
The Soil Ecosystem
25.0K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
25.0K
Residual Plots
6.5K
A residual plot is a statistical representation of data used to analyze correlation and regression results. It helps verify the requirements for drawing specific conclusions about correlation and regression. To obtain the residual plot, first, the residual for each data value is calculated, which is simply the vertical distance between the observed and the predicted value obtained from the regression equation.
When the residual values are plotted against the variable x, it is called a residual...
When the residual values are plotted against the variable x, it is called a residual...
6.5K
Residual Stresses
670
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
670
Reinforcement
960
Positive and negative reinforcement are key concepts in operant conditioning, a learning process where the consequences of a behavior affect the likelihood of that behavior being repeated.
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
960
Water and Mineral Acquisition
35.9K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
35.9K


