高周波単面周期的負荷下での不飽和砂岩の振る舞い
Zhenwei Jiang1, Bingyan Shen2, Jiaqing Gao1
1College of Geological Engineering and Surveying, Chang'an University, Xi'an, China.
Scientific reports
|August 26, 2025
まとめ
サンディ・ロースは,特に中国では,周期的な負荷下で不安定化傾向にあります.
科学分野:
- 地理工学
- 土壌の力学
- 環境地質学
背景:
- 砂の土壌は周期的な負荷下で構造の故障に敏感です.
- 中国のロース高原の炭化水素採掘地帯では,繰り返し地質学的な故障が観察されています.
- マリアンチェン村の山崩れは,これらの土壌と関連したリスクを強調しています.
研究 の 目的:
- 不飽和の砂岩の水分に依存し,周波数によって制御される機械的振る舞いを調査する.
- ロース高原の採掘地帯における地質学的な故障の原因を理解する.
主な方法:
- 土壌の振る舞いを分析するために,周期的三軸試験が採用されました.
- この研究では,ストレス-ストレスのヒステリシス,シア硬さ,エネルギー分散を評価した.
- 湿度と充填頻度の影響を調べた.
主要な成果:
- プラスチックの限界を超えた水分は,機械的性質に最小限の影響を及ぼしました.
- プラスチックの限度以下の水分含有量は,減圧比率を増加させ,切断抵抗を減少させた.
- より高い負荷周波数により,ストレスの大きさと切断の硬さが増加したが,ダッピングは減少した.
結論:
- 周期的負荷下でのサンディ・ロースの行動は複雑で,湿度と周波数の影響を受けます.
- これらの要因を理解することは 採掘地帯での山崩リスクの軽減に不可欠です
- 土壌の安定化に及ぼす高速度の周期的負荷へのさらなる研究が必要である.
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