基于电阻的人工永久土的强度特征的评估
Zhijie Li1, Wei Shen1, Ya Chu2
1College of Transportation Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, China.
Scientific reports
|November 21, 2025
概括
在泥土中的人工地面结强度使用电阻力进行了评估. 强度随着温度和干燥密度的下降而增加,与电阻线性相关,使得能够准确地在现场进行强度评估.
科学领域:
- 地质技术工程 地质技术工程
- 土壤科学 土壤科学
- 结的地面工程学
背景情况:
- 人工地面结 (AGF) 对于复杂的地质工程项目至关重要.
- 现有有限的in situ方法用于评估冷土壤强度.
- 了解电特性与强度之间的关系至关重要.
研究的目的:
- 通过使用一种新的嵌入式四电极系统,研究富含水分的泥土的强度和电气特性.
- 建立一种基于电阻的模型,用于预测冷土壤强度.
- 分析温度,含水量和干燥密度对土壤特性的影响.
主要方法:
- 开发并使用自主开发的嵌入式四电极系统.
- 在长江泛滥平原的富含水的泥土上进行了测试.
- 雇佣了布鲁纳尔-埃梅特-泰勒 (BET) 和扫描电子显微镜 (SEM) 用于微观结构分析.
主要成果:
- 不受限制的压力强度 (UCS) 随着温度下降而呈现"缓慢-急剧-缓慢"的增加,随着干燥密度的增加而上升.
- 峰值强度发生在关键含水量为22%时,强度因暴裂纹而降低.
- 电阻率随着温度的下降逐步增加,显示出与和的功率定律关系.
- 无论是UCS还是变形模量,都与电阻线性相关.
- 微观结构分析揭示了孔扩大和结解周期下的结构转变.
结论:
- 电阻是冰土壤强度,微观结构变化和水分含量的可靠指标.
- 开发的基于电阻的模型为准确的现场强度评估提供了基础.
- 这些发现增强了对结土壤特性和电气行为之间的合机制的理解.
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