摘要
咬合桩防渗止水性能优异,弧形结构抗压能力强、整体性好,把二者的优点结合将产生一种新型经济实用的支护体系。本文以结构力学为基础,将圆弧微拱咬合桩的拱效应与被动区土抗力等效为弹簧,提出了一种简化计算法。以跨岷江特大桥14#墩拱座基坑为背景,利用此方法计算桩的变形,并与监测数据、数值模拟以及规范法对比,探讨该方法的可行性和计算精度问题。结果表明:使用本方法所计算出的桩体水平位移与监测结果均表现出了悬臂桩变形趋势且桩顶位移相差较小,说明了该方法在弧形咬合桩设计计算中的有效性和实用性,可为相关工程提供设计依据。
The occluding pile has excellent anti-seepage and water-sealing performance,and the arc-supporting structure has a strong anti-pressure ability and good integrity.The combination of the two will become a new economical and practical support system.Based on structural mechanics,this paper equates the arch effect of arc-arranged occluding piles support structure and the passive soil resistance to spring and presents a simplified calculation method.Taking the foundation pit of the No.14 arch abutment of the Minjiang grand bridge as a background,this method is used to calculate the deformation of piles and compared with the monitoring data,numerical simulation,and standard method.The feasibility and calculation accuracy of this method are discussed.The horizontal displacements of the piles calculated using this method and the monitoring results show the trend of the cantilever pile deformation and the difference of the displacement of the top of the pile is small,which shows the effectiveness and practicability of this method in the design and calculation of arc-shaped occluded pile and can provide a design basis for related engineering.
作者
张宇
张莲花
ZHANG Yu;ZHANG Lian-hua(School of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059)
出处
《广州建筑》
2024年第1期43-46,共4页
GUANGZHOU ARCHITECTURE
关键词
弧形咬合桩
解析法
理论分析
侧位移
拱效应等效弹簧
arc-arranged occluding piles
analytical method
theoretical analysis
lateral displacement
equivalent spring of arch effect
