强夯法处理山区机场高填方地基的试验  

Experiment on high-filled foundation treatment of airport in mountainy area with dynamic compaction method

作　　者：朱彦鹏[1,2] 师占宾 杨校辉[1,2] ZHU Yan-peng;SHI Zhan-bin;YANG Xiao-hui(Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering,the Ministry of Education,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学甘肃土木工程防灾减灾重点实验室,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2018年第5期120-125,共6页Journal of Lanzhou University of Technology

基　　金：教育部创新团队支持计划项目(IRT_17R51);甘肃省科技重大专项计划项目(1302FKDA030);国家自然科学基金(51508256);甘肃省建设科技攻关计划项目(JK2015-5);兰州市科技发展计划项目(2015-3-131)

摘　　要：为获得强夯法在山区高填方机场地基加固中的最优夯击次数及加固深度,综合评价强夯法在地基加固中的效果,分别采用2、3、4MN·m三种强夯能级,分区进行试夯.试验结果表明:原地基2、3、4 MN·m强夯的最佳夯击次数分别为10击、13击、15击,有效加固深度分别为4、6、8m.对于填方区:粉质黏土厚度小于4m时,强夯能级宜选用2MN·m;粉质黏土厚度4～6m时,强夯能级宜选用3 MN·m;粉质黏土厚度大于6～8m时,强夯能级宜选用4 MN·m.强夯法作为当下最为常用、最为有效的地基处理加固方法,在山区机场地基加固处理时效果好、实用性强,是施工优先采用的方法.In order to obtain the optimal tamping times and reinforcement depth of foundation reinforcement of mountainy airport with dynamic compaction method and evaluate its effect on foundation reinforcement,three kinds of dynamic compaction energy levels of 2,3 and 4 MN·m were used respectively to carry out district compaction try.Its result shows that the optimal times of dynamic compaction of the original foundation with above-mentioned three kinds of compaction will be 10,13 and 15,respectively,and the effective reinforcement depth will be 4,6 and 8 m,respectively.As for the fill area,the dynamic compaction energy level will be better to be chosen as 2 MN·m when the thickness of silty clay is less than 4 m,as 3 MN·m when the thickness of silty clay is from 4 to 6 m,and thickness of silty clay is from 6 to 8 m,the dynamic compaction energy level of 4 MN·m will be better to be chosen.Dynamic compaction method as a current most common and effective method for foundation reinforcing treatment in mountainous areas will have good effect and strong practicability,being a prior constructional method to be chosen.

关 键 词：高填方地基 地基处理 强夯法 夯击次数 加固深度 

分 类 号：TU472[建筑科学—结构工程]