摘要
根据相似原理,设计采用70 cm×70 cm×70 cm(长×宽×高)的模型箱,制备含水率为20%的粘性土,通过3种不同的锤径以及施加3种不同的能量组合进行夯击试验,试验中观测了夯点的地面变形与夯坑深度,建立了夯坑深度与所取得的土质参数和施工参数间的相关方程,并用工程实例对拟合的方程进行验证。结果显示:该方程可用来推算现场强夯时的夯坑深度,还可推算场地平均夯沉量。
According to the principle of similarity, the 70cm×70cm×70cm （ length × width ×height） model box is designed to prepare the cohesive soil with water content of 20 %. The compaction tests using three hammer diameters and applying three energy combinations are conducted, during which the ground deformation of the tamping points and the depth of the tamping pits are observed, and then the equation of correlation between the depth of tamping pit, and the soil and construction parameters obtained are established. This fitting equation is verified by case study. The results show that the equation can be used to calculate the depth of tamping pit in case of on-site dynamic compaction, and project the average compaction subsidence in the field.
出处
《路基工程》
2012年第6期7-10,14,共5页
Subgrade Engineering
基金
国家自然科学基金项目(50869002)
江西省自然科学基金项目(2008GZC003)
江西省教育厅科技项目(GJJ10486)
关键词
粘性土
强夯
相似原理
模型试验
夯坑深度
量纲方程
cohesive soil
dynamic compaction
principle of similarity
model test
depth of tamping pit
dimensional equation
