高能级强夯加固湿陷性黄土地基动应力的研究  

Study of dynamic stress of high energy level dynamic compaction in collapsible loess foundation

作　　者：张兴元[1] 胡爱萍[1] 郭建博[1] 杨宏平[1] 张斌伟[1] 

机构地区：[1]陇东学院土木工程学院,甘肃庆阳745000

出　　处：《中国建材科技》2016年第3期67-71,共5页China Building Materials Science & Technology

基　　金：庆阳市民生计划项目(MS201302);陇东学院青年科技创新项目(XYZK1410);甘肃省高等学校科研项目:(2014B-090);甘肃省住房和城乡建设厅项目:(2015-075)

摘　　要：基于相似原理,通过室内模型试验,研究了湿陷性黄土地基中高能级强夯作用下动应力的传播规律,研究结果表明:(1)在强夯夯击数较小时,低能级强夯的动应力略高于高能级强夯;随着强夯夯击数增加,高能级强夯的动应力明显大于低能级强夯,高能级强夯的优势逐渐显现,其加固效果明显优于低能级强夯;(2)强夯夯击数增加到一定程度后,在地基土某一深度以上,虽然高能级强夯的动应力远大于低能级强夯的动应力,但衰减的速度很快,而在该深度以下,高能级强夯的动应力和低能级强夯的动应力相差不再悬殊;(3)高能级强夯处理过的地基土从上到下可以分为3个区域,即松弛区域、加固区域和弹性区域。Based on the similarity theory and model test, we have study the disciplines of dynamic stress of high energy level dynamic compaction disseminate in collapsible loess, the results showed that：（1） When a small number of dynamic compaction compaction, dynamic stress of low energy level slightly higher than the high energy level dynamic compaction; With the increase of the number of tamping compaction, dynamic stress high energy level dynamic compaction is significantly greater than the low energy level, high energy level and strong advantages ram gradually emerging, the reinforcement is better than a lower energy level dynamic compaction;（2） Pounding the number of ram to a certain extent, at a depth of soil above, although dynamic stress high energy level dynamic dynamic stress is much greater than low energy level dynamic compaction, but the rate of decay quickly, and at that depth or less, dynamic stress of high energy level dynamic compaction and dynamicstress of low energy level difference is no longer the poor;（3）From top to bottom,the soil treated by high energy level dynamic can be divided into three regions,they are relaxation area, strengthening regional and elastic area.

关 键 词：高能级 强夯 湿陷性 黄土地基 动应力 

分 类 号：TU43[建筑科学—岩土工程]