摘要
通过3组不同桩间距下双排微型桩加固碎石土滑坡室内模型试验,研究微型桩受力变形特性和滑坡推力传递规律。试验结果表明:双排微型桩承受的滑坡推力主要集中在滑面以上1/3桩身范围内,桩身最大弯矩位于滑面附近,且桩群均以第一排桩达到其弹性受力极限而失效;桩间距为5d时,微型桩群对桩间土的遮蔽阻挡效果最好,桩群能承受的滑坡推力最大,且桩顶位移最小,滑坡推力在排桩间分布最合理,其传递系数α在(0.5,0.7)间取值。
The stress deformation characteristics of micro-pile and the transmission law of the landslide are studied through three groups experiments of different piles spacing under double rows of micro-piles reinforcement debris landslide.The test results show that the thrust of landslide subjected to double rows of miniature piles is mainly concentrated in the area of 1/3 pile above the sliding surface,and the maximum moment of the pile is located near the sliding surface,and the pile groups all fail when the first row pile reaches its elastic stress limit.When the spacing between piles is 5 d,the micro-pile group has the best shielding effect on the soil between piles.The pile groups can bear the largest thrust and the displacement of pile is the smallest.The distribution of the landslide thrust is the most reasonable among the piles,and its transfer coefficientαis between 0.5 and 0.7.
作者
胡时友
蔡强
李超杰
HU Shiyou;CAI Qiang;LI Chaojie(College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu,Sichuan 610059,China;Institute of Exploration Technology,CAGS/Technical Center for Geological Hazard Prevention and Control,CGS, Chengdu,Sichuan 611734,China;Chengdu Aeronautic Polytechnic,Chengdu,Sichuan 610100,China)
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2018年第5期114-120,共7页
Hydrogeology & Engineering Geology
基金
国土资源部公益性行业专项项目资助(地质灾害防治工程缺陷修复加固技术装备研发
201511051)
关键词
微型桩
碎石土滑坡
受力变形特性
滑坡推力传递系数
micro-pile
debris landslide
stress deformation characteristics
landslide thrust transfer coefficient
