堆煤荷载下软土-群桩-承台体系三维数值分析

为了探讨软土场地中堆煤荷载作用下邻近群桩承台体系受力变形特性,以马来西亚某大型储煤场为具体工程背景,基于大型有限元数值计算平台ABAQUS建立可考虑空间刚度效应的堆煤荷载作用下软土-群桩-承台体系三维非线性数值模型,对既定场地群桩承台基础方案进行受力变形分析和安全性评价.结果表明,在堆煤荷载作用下,靠近堆煤侧桩体侧向位移最大,在软弱夹层深度范围内桩体内力变化存在突变现象;在边承台桩身中部和底部,以及中承台桩顶与承台连接处存在拉应力集中区.

Three-dimensional numerical analysis for soft soil-pile group-bearing platform system under influence of coal pile load

In order to investigate the characteristics of force deformation of peripherial pile group bearing platform subjected to the influence of coal pile load, taking a large specific coal yard in Malaysia as engineering background and based on the large finite element numerical calculation platform ABAQUS, a three-dimensional nonlinear numerical model for the soft soil-pile group-bearing platform system under the influence of coal pile load was established with the consideration for space stiffness effect, and the force deformation analysis and safety evaluation for base scheme of group pile bearing platform were also performed. The results show that under the influence of coal pile load, the pile bodies near the coal pile side have the maximum lateral displacement, and the mutation phenomenon occurs during internal force deformation of pile bodies within the depth range of weak interlayers. In addition, the tensile stress concentration zone exists within the middle and bottom sections of pile bodies for side bearing platform and the joint section between bearing platform and pile cap of middle platform.