碎石土填方夯后地基检测试验  

Test Experiment of Gravelly Soil Fill Foundation after Dynamic Compaction

作　　者：赵帅军[1,2] 陆新[1,2] 杨森[1,2] 苏杭[1,2] 

机构地区：[1]后勤工程学院军事土木工程系,重庆401311 [2]后勤工程学院岩土力学与地质环境保护重庆市重点实验室,重庆401311

出　　处：《后勤工程学院学报》2014年第6期12-16,共5页Journal of Logistical Engineering University

摘　　要：为获得10 000 k N·m高能级强夯处理碎石土填方效果,并研究不同填土厚度对强夯影响深度的作用,分别在厚度为10 m和30 m的A,B2块碎石土填方试验区上进行强夯试验。应用静载试验、超重型动力触探和瑞雷波测试对试验场地夯前、夯后的土层进行检测。结果表明:经过10 000 k N·m高能级强夯处理后,2块填方试验区的承载力和变形模量都有较大提高;A试验区的强夯显著影响段为8 m,大于B试验区的6 m,说明强夯对有限厚度填土(强夯影响深度以下为硬层)加固效果更好,而对无限厚度填土(强夯影响深度以下为松散填土层)强夯能量的消散速度更快。In order to obtain effects of gravelly soil fill with 10 000 kN·m high energy level dynamic compaction and explore the effect of the depth of fill on the experimental results, dynamic compaction tests are conducted in two gravelly soil fills of 10 m and 30 m respectively, which are marked as A and B. The effect after dynamic compaction is analyzed by a plate loading test, ultra heavy dynamic sounding and Rayleigh wave detection. The results show that foundation bearing compaction and the modulus of de?formation are significantly improved after dynamic compaction;the depth of influence of 10 m fill is 8 m while 30 m fill is 6 m, indi?cating that high energy level dynamic compaction shows better performance in filling of finite thickness, where hard foundation lies below depth of influence, whereas, for filling of infinite thickness, where loose filling lies below depth of influence, energy of dynamic compaction dissipates faster.

关 键 词：强夯试验 加固效果 碎石土 深厚填方 

分 类 号：TU44[建筑科学—岩土工程]