摘要
非饱和黄土湿陷是影响黄土地区工程建设的重大问题之一。研究其湿陷系数与基质吸力之间的定量关系有助于更精确地评估黄土的工程性状与湿陷特性。本文通过室内试验，采用不同基质吸力条件下的湿陷试验，探讨了湿陷系数与基质吸力之间的关系。试验结果表明，非饱和黄土的湿陷系数随基质吸力的变化呈现明显的规律性，基质吸力的增大使湿陷系数发生变化。基于实验数据，建立了湿陷系数与基质吸力的定量关系模型，为工程设计和施工提供了科学依据。
关键词： 非饱和黄土；湿陷系数；基质吸力；定量关系；工程性状
Abstract
The collapsibility of unsaturated loess is one of the major issues affecting engineering construction in loess areas. Studying the quantitative relationship between its collapsibility coefficient and matric suction is helpful for more accurately evaluating the engineering properties and collapsible characteristics of loess. In this paper, through laboratory tests, collapsibility tests under different matric suction conditions were conducted to explore the relationship between collapsibility coefficient and matric suction. The test results show that the collapsibility coefficient of unsaturated loess changes with matric suction in an obvious regular pattern, and the increase of matric suction leads to changes in the collapsibility coefficient. Based on the experimental data, a quantitative relationship model between collapsibility coefficient and matric suction was established, providing a scientific basis for engineering design and construction.
Key words： Unsaturated loess; Collapsibility coefficient; Matric suction; Quantitative relationship; Engineering properties
参考文献 References
[1] 郭楠,杨校辉,贾世宁,等.基于空间滑动面变化的横观各向同性非饱和黄土强度准则及验证[J/OL].岩土工程学报,1-12[2025-07-10].
[2] 李林,张等红,张淼,等.考虑水-力耦合的桩-非饱和黄土接触面荷载传递模型[J].岩土力学,2025,46(05):1343-1355+1367.D
[3] 杨校辉,赵子毅,郭楠,等.横观各向同性非饱和黄土蠕变特性及沉降预测[J].岩土力学,2025,46(05):1489-1500 +1510.
[4] 罗玚,周凤玺,马强.冻融循环条件下铅离子在非饱和黄土中的迁移规律[J].哈尔滨工业大学学报,2025,57(03): 110-119+138.
[5] 秦彪,李喜安,王力,等.考虑封闭气相影响的非饱和黄土变形和强度行为[J].岩石力学与工程学报,2024,43(11): 2846-2857.
[6] 许领,兰天刚,陆世锋,等.沉积深度对非饱和原状黄土压缩及湿陷特性的影响[J/OL].地球科学,1-12[2025-07-10].
[7] 付炜烨.不同水力路径下非饱和黄土宏-微观变形特性研究[D].西安理工大学,2024.
[8] 王玉洁.黄土非饱和渗透参数的测试方法研究[D].西安石油大学,2024.