非饱和粘土在冲击试验下变形特性研究  

Study of Deformation Characteristics of Unsaturated Clay under Impact Load

作　　者：王丽华[1] 

机构地区：[1]南京市测绘勘察研究院有限公司,江苏南京210019

出　　处：《江苏建筑》2016年第B12期73-75,536,共3页Jiangsu Construction

摘　　要：目前对于非饱和土地基的强夯理论研究相对较少,主要以经验为主,加固效果总体较好,但其强夯机理以及技术的发展与改进仍需进一步的完善。针对这一问题,自行设计模型试验,对冲击载荷下非饱和粘土的变形特性进行研究。研究结果表明:相同冲击能量作用时,单击夯沉量不同,随着夯击次数的增加而减少;不同冲击能量作用时,夯坑深度随冲击能量的增加而增大。由此看来,冲击能量、夯击次数等对变形特性都有显著影响,因此在工程实际中,不能单一增加某一个参数,而应该综合协调,取最佳能量组合。The unsaturated soil consolidation theory research is relatively little and can not effectively guide the construction, so it is mainly based on the experience. Although the reinforcement effect is good generally, both the reinforcement mechanism and improvement of the technology need to be further researched. In this paper, the model test was designed, and the tamping pit depth was measured to explore the deformation characteristics of the unsaturated clay. The results show that：Under the same impact energy, the settlement of single click is quiet different, decreased with the increasing number of dynamic compaction; under the different impact energy, the depth of the tamping pit is increased with the increasing of impact energy. Both the impact energy and compaction number have influence stress distribution and the depth of tamping pit, so in practice, both factors should be considered to get the optimal energy combination.

关 键 词：非饱和粘土 冲击载荷 模型试验 变形特性 

分 类 号：TU422[建筑科学—岩土工程]