边坡品字型抗滑桩加固效果监测分析  

Monitoring and analysis of reinforcement effect of slope with pyramid-disposed anti-slide piles

作　　者：王秀丽[1,2] 于光明[1,2] 陈美合 

机构地区：[1]兰州理工大学土木工程学院,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》2016年第3期121-127,共7页Journal of Lanzhou University of Technology

基　　金："十二五"国家科技支撑计划项目(2011BAK12B07)

摘　　要：针对品字型抗滑桩在滑坡推力作用下的受力及变形特性这一问题,对1组顶部由连梁连接的3根圆形抗滑桩进行现场原位应力应变观测,同时,基于弹性地基梁理论,反算出钢筋混凝土抗滑桩位移和弯矩.结果表明:该滑坡滑动趋势缓慢,抗滑桩起到了阻止滑坡继续发展的作用;各桩所受弯矩均未超过其承载力设计值,表明抗滑桩处于安全工作状态;前后排桩对滑坡推力分担不均衡,设计中采用不同的截面尺寸及配筋率会使抗滑桩设计更加经济合理;连梁对桩的协调作用是有限的.Aimed at the problem of mechanical and deformed characteristics of pyramid-shaped anti-slide piles under landslide thrusts,agroup of three circular pile connected with beams was observed on field in connection with its stress and strain.Meanwhile,based on the theory of elastic foundation beam,the displacement and reinforced concrete bending moment of the anti-slide piles were calculated inversely.The result showed that the landslide sliding trend would be slow and the piles would prevent further sliding of the land;the moment and displacement of every anti-slide pile would not exceed the maximum design value,illustrating that anti-slide piles were in save working state;the thrust-sharing among anti-slide piles would be unbalanced,therefore,different cross-sectional dimensions and reinforcement ratio should be employed in their design,making the design of the anti-slide pile more economic and reasonable;the coordinating role of connecting beam on the pile would be limited.

关 键 词：品字型抗滑桩 滑坡治理 受力变形监测 合理设计 

分 类 号：TU391[建筑科学—结构工程]