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为解决近海桩位碰撞问题、了解桩位碰撞对邻近土体振动的影响,基于FLAC3D建立了三维非线性数值模型,模型中加入了吸收边界条件以避免在边界发生不真实的波反射,同时为更真实地反映近海土体在桩位碰撞情况下的动力响应考虑了土体的动力固结和非线性,并在桩土之间建立了Goodman接触,对近海桩位碰撞时土体的振动情况进行了三维数值模拟。结果表明,桩位碰撞会对周围土体的振动产生严重的影响,并可能导致邻近地下结构的损伤。
In order to solve the problem of collision of offshore piles and to understand the effect of pile collision on the vibration of adjacent soil, a three-dimensional nonlinear numerical model is established based on FLAC3D. Absorption boundary conditions are added in the model to avoid unrealistic wave reflection at the boundary, More realistically, the dynamic response of offshore soils in the case of pile collision is considered. The dynamic consolidation and nonlinearity of soils are considered. Goodman contact is established between the pile and soil. The vibration of soil during the collision of offshore pile Three-dimensional numerical simulation was performed. The results show that the pile collision will have a serious impact on the vibration of the surrounding soil and may lead to the damage of the adjacent underground structures.