摘要
针对典型的双排桩支护结构,运用有限差分法对双排桩进行数值模拟,研究双排桩和单排桩的变形和受力特点以及双排桩布置参数对其结构位移的影响.研究表明:双排桩的后排拉锚作用使前排桩位移最大处出现在桩身上部,后排桩的位移最大处出现在桩顶;随着排距增大,桩身位移先增大后减小;随着桩间距减小、桩长增加,桩身位移减小;缩减后排桩数量能够增加支护桩位移和弯矩,且冠梁刚度对不同布置形式的支护桩内力及变形有影响,冠梁刚度越大,缩减后排桩数量对支护结构的影响越小.
In view of the typical double-row piles support structure,the finite difference method was utilized for numerical simulation of the double-row piles.The deformation and stress characteristics of both double-row piles and single-row pile,along with the impact of layout parameters on structural displacement were studied.Research findings indicated that the anchoring effect of the rear row of piles results in maximum displacement occurring at upper section of the pile body in the front row,while maximum displacement in the rear row was observed at the top of the pile.As the spacing between rows increased,the displacement of the pile body initially increased before subsequently decreasing.Conversely,reducing the spacing between piles while increasing the pile length led to a reduction in pile body displacement.Furthermore,reducing the number of rear row piles may result in increased displacements and bending moments within support piles.Additionally,it was observed that beam stiffness significantly affected the internal forces and deformations within support structures arranged in various configurations.Specifically,an increase in beam stiffness mitigated the effects associated with reducing rear row piles on the overall structural performance.
作者
潘金龙
林军
崔雅珍
PAN Jinlong;LIN Jun;CUI Yazhen(School of Civil and Architectural Engineering,Nanjing Tech University Pujiang Institute,Nanjing,211200;School of Civil Engineering and Architecture,Jiangsu Open University,Nanjing,210036)
出处
《南京工程学院学报(自然科学版)》
2024年第4期38-41,共4页
Journal of Nanjing Institute of Technology(Natural Science Edition)
关键词
有限差分法
双排桩
力学性能
finite difference method
double-row piles
mechanical property
