透水性水反応性ポリウレタンで強化された花岩残土の機械的特性
Shuzhong Tan1, Jinyong Li2, Dingfeng Cao3
1Fujian Provincial Center for Transportation Construction Quality and Safety, Fuzhou 350001, China.
Polymers
|February 13, 2026
まとめ
浸透性水反応性ポリウレタン (PWPU) は,花岩残土 (GRS) を安定させ,柔らかさを高め,崩壊を防止します. この方法は,従来のグルーティング方法とは異なり,重要な地下水の排水を維持しながら,機械的な強さを改善します.
科学分野:
- ジオテクニカルエンジニアリング ジオテクニカルエンジニアリング
- マテリアルサイエンス 材料科学
- 土壌力学 土壌力学
背景:
- グラニット残土 (GRS) は水による軟化が起こりやすいため,斜面の不安定性が生じます.
- 従来の浸透性のないグルーティングは,排水を阻害することによって,GRSの危険性を悪化させる可能性があります.
- 水力伝導性を損なわずに機械的性質を高める安定化方法が必要である.
研究 の 目的:
- GRS.を安定化するために,浸透性水反応性ポリウレタン (PWPU) の有効性を評価する.
- GRS.の機械的行動と故障メカニズムに対するPWPUの影響を調査する.
- GRS安定化における機械補強と液圧伝導性の衝突を解決する.
主な方法:
- 単軸圧縮試験は,水分とPWPUの含有量が異なるGRSで行われます.
- 同期音響放出 (AE) 監視と,故障メカニズム分析のためのデジタル画像相関 (DIC).
- 電子顕微鏡スキャン (SEM) による微細構造の特徴化.
主要な成果:
- PWPUの処理により,土壌の柔軟性が著しく向上し,特に湿度が高い場合,壊れやすい状態からストレスト硬化に転移しました.
- 10%の最適なPWPU含有量は,最大圧縮強度4.5MPaをもたらしました.
- SEMは,粒子を結合し,透過性を保持する多孔ポリマーネットワークを確認した.
- AEの分析では,引力クラッキングが故障発生の79.17%から96.35%を占めていることが示された.
結論:
- PWPUは,柔軟なマイクロ強化ネットワークを形成することで,GRSを効果的に安定させ,柔らかさとエネルギー分散を高めます.
- 最適なPWPU用量は,強度増強と浸透性を維持するバランスをとります.
- 同期的なAEとDICのモニタリングにより,複数のスケールの故障メカニズムに関する定量的な洞察が得られました.
キーワード:
アコースティック・エミッション (AE)デジタル画像相関 (DIC) とはグラニット残土 (GRS)マイクロメカニズムのミクロメカニズム水に反応する透かし性ポリウレタン (PWPU)単軸圧縮強度 (UCS) とはさらに関連する動画
関連する概念動画
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


