斜-竖直交替组合桩加固边坡特性研究  

RESEARCH ON MECHANICS OF OBLIQUE-VERTICAL ALTERNATE PILES IN SLOPES

作　　者：刁钰[1,2] 晋壮壮 黄胜 杨超[1,2] 朱鹏宇 秘诚 马敖炀 DIAO Yu;JIN Zhuangzhuang;HUANG Sheng;YANG Chao;ZHU Pengyu;BI Cheng;MA Aoyang(Key Laboratory of Coast Civil Structure Safety of Ministry of Education,Tianjin University,Tianjin 300072,China;Department of Civil Engineering,Tianjin University,Tianjin 300072,China;Chengdu Jinlu Communication Investment Construction Co.,Ltd.,Chengdu 610400,China)

机构地区：[1]滨海土木工程结构与安全教育部重点实验室,天津300072 [2]天津大学土木工程系,天津300072 [3]成都金路交投建设有限公司,成都610400

出　　处：《工业建筑》2020年第11期91-96,共6页Industrial Construction

基　　金：国家重点研发计划项目(2016YFC0802008);天津市自然科学基金项目(19JCYBJC22200);国家自然科学基金重点项目(41630641)。

摘　　要：斜-竖直交替组合桩在无支撑基坑支护工程中已逐步得到了应用,并被证明对于控制位移和稳定边坡有良好的效果。为研究斜-竖直交替组合桩加固边坡的力学特性,利用室内模型试验及Plaxis有限元软件对此进行研究。结果表明:斜-竖直交替组合桩相比单排竖直桩在控制位移和提高边坡稳定性方面更为有利;当斜直桩倾角增大时,桩身的水平变形逐渐减小;抗滑桩与坡脚距离增大时,桩身的弯矩和水平变形也会随之增大。在实际工程应用中,应根据场地条件和施工情况加以选择,达到安全性和经济性的统一。Through research and application in deep excavation without horizontal supports,oblique-vertical alternate piles have been popularized gradually in practice and proven effective in controlling deformation and stability of slopes. To study the mechanical characteristics of the technique,a model test and infinite element analysis by Plaxis 2D were performed. The results showed that compared with vertical piles,oblique-vertical alternate piles were more advantageous in controlling deformation and improving stability of slope. The lateral deformation of piles decreased with the increase tilt angles of oblique piles. And when the distances between piles and toes of slopes increased,the lateral deformation and bending moment of piles increased accordingly. In engineering practice,site and construction conditions should be considered to achieve more safety and economic.

关 键 词：斜-竖直交替组合桩 边坡 模型试验 有限元计算 稳定性 

分 类 号：TU470[建筑科学—结构工程]