摘要
填海造陆会导致邻近桥梁出现桩基单侧堆载的现象,容易引起桩基的侧向位移和附加弯矩,严重时将引起桩基的开裂甚至破坏,危及上部结构的正常运行。运用三维有限元软件FLAC3D分析了填海造陆带来的侧向堆载作用下,可门港大桥群桩基础的受力与变形特性。采用控制变量法研究了侧向堆载距离、侧向堆载高度对群桩基础承载特性的影响,并对比了群桩和单桩在侧向堆载作用下的工作性能。数值模拟结果表明:侧向堆载作用下,桩身的受力特性受侧向堆载距离和堆载高度的影响显著;群桩中各桩的承载性能均优于单桩,但桩顶位移却较单桩大,并且低承台四桩结构在桩顶部位弯矩较大。
Due to sea reclamation in coastal soft soil areas,there often exists the phenomenon of imbalanced surcharge loads;which is easy to cause lateral deflection and additional bending moment of pile foundation,serious damage will result in cracking of pile foundation,endanger the normal operation of the superstructure.The three-dimensional finite element software FLAC3D is used to analyze the force and deformation characteristics of the pile group foundation of the Kemen Port Bridge under the lateral load caused by land reclamation.The control variable method is used to study the influence of lateral stacking distance and lateral stacking height on the bearing characteristics of pile group foundations,and the working performance of group piles and single piles under lateral pile loading was compared.Numerical results show that,under the action of lateral stacking,the force characteristics of the pile body are significantly affected by the lateral stacking distance and stacking height;the bearing performance of each pile in the pile group is better than that of a single pile,but the displacement of the top of the pile is larger than that of a single pile and the four-pile structure with low cap has a larger bending moment at the top of the pile.
出处
《福建建设科技》
2021年第5期21-25,共5页
Fujian Construction Science & Technology
关键词
软土
邻近堆载
桩基
数值模拟
soft-soil
neighboring accumulation
pile foundation
numerical simulation
