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在深基坑桩锚式支护结构中,桩顶钢筋混凝土圈梁的空间效应对支护结构的变形和内力有着不同程度的影响。通过对长沙某深基坑桩锚支护结构圈梁水平位移与内力的现场监测,结合理论计算,并利用有限元软件FLAC3D模拟,研究分析了圈梁在桩锚支护结构中的作用效应,提出了圈梁影响刚度的简化计算方法,可供同类的工程设计参考。
In the deep foundation pit pile-anchor supporting structure, the space effect of pile-capped reinforced concrete ring beam affects the deformation and internal force of the supporting structure in varying degrees. Through the on-site monitoring of the horizontal displacement and internal force of the ring beam of the pile-anchor supporting structure in a deep foundation pit in Changsha, combined with the theoretical calculation and the FLAC3D simulation of the finite element software, the effect of the ring beam in the pile-anchor supporting structure is analyzed. A simplified method of calculating the stiffness of the ring beam is proposed, which can be used as a reference for similar engineering design.