摘要
很多学者通过宏观力学的方式探讨软泥土的开裂行为,而对于其微观的本质研究较少。在软泥土饱和与非饱和界面存在收缩膜,根据收缩膜与土颗粒传递拉力平衡关系建立了非饱和土体的受力模型,分析收缩膜在基质吸力和周围边界传递的拉力作用下变形情况,解释土体的开裂微观力学机制,并通过不同尺寸试验槽试验对蒸发和干燥条件下的软泥土开裂过程进行研究。
The mechanism of soil cracking has long been concerned and discussed from the perspective of macro mechanics. Based on the concept of the contractile skin in the Soil Mechanics for U nsaturated Soils,a mechanical model on which the force equilibrium is established is developed. W ith the established model,the microcosmic mechanical mechanism for soft soil cracking can be clearly paraphrased. The tensile test of water film and attachments is analogy of soil cracking process. The start,development and end of saturated soil cracking are further studied by different scales and shapes of the model tests.
出处
《应用数学和力学》
CSCD
北大核心
2015年第S1期117-128,共12页
Applied Mathematics and Mechanics
基金
国家自然科学基金(41272323)~~
关键词
软泥土
开裂机理
模型试验
soft clay
cracking mechanism
model test
