J Shanghai Jiaotong Univ Sci ›› 2024, Vol. 29 ›› Issue (5): 930-939.doi: 10.1007/s12204-023-2668-x
李晓月1,郑新江2
收稿日期:
2023-03-30
接受日期:
2023-06-30
出版日期:
2024-09-28
发布日期:
2024-09-28
LI Xiaoyue1∗ (李晓月), ZHENG Xinjiang2 (郑新江)
Received:
2023-03-30
Accepted:
2023-06-30
Online:
2024-09-28
Published:
2024-09-28
摘要: 膨润土的膨胀过程对于判断膨胀完成所需时间、评估工程安全和组织施工计划至关重要。影响膨胀过程的因素很多,其背后机理尚需明确解释。本文通过一维自由膨胀试验和常体积膨胀压试验,研究了商用膨润土在不同浓度盐溶液中的膨胀过程。用双曲线模型拟合了膨胀随时间变化的曲线,并提取了两个参数以定量反映膨胀速率和最终膨胀应变或膨胀压。试验结果表明:最终的膨胀应变或膨胀压是由膨润土的膨胀能力决定的,而膨胀速率则受土体膨胀能力和渗透性的耦合影响。通过考虑膨胀过程中孔隙结构的变化过程,将不同因素对膨润土膨胀过程的影响机理统一为对土体渗透性和膨胀能力的影响。所提出的机理也可以合理地解释现有文献中初始含水量的影响。本文从孔隙结构角度揭示的膨胀过程影响机理,为分析膨润土的膨胀过程提供了合理的理论依据。
中图分类号:
李晓月1, 郑新江2. 干密度及含水量对膨润土膨胀过程影响的机理解释[J]. J Shanghai Jiaotong Univ Sci, 2024, 29(5): 930-939.
LI Xiaoyue1∗ (李晓月), ZHENG Xinjiang2 (郑新江). Mechanism Explanation of Influence of Dry Density and Water Content on Bentonite Swelling Process[J]. J Shanghai Jiaotong Univ Sci, 2024, 29(5): 930-939.
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