排桩与圈梁协同作用下考虑开挖过程的挠曲方程法

实践表明,支护排桩与圈梁之间有较好的协同作用,圈梁的空间效应对支护桩的变形和内力均有一定的影响.本文根据圈梁对排桩的约束及变形协调,给出一种排桩与圈梁协同作用下考虑开挖过程的挠曲方程法,并结合工程资料进行了分析

COOPERATIVE ACTION BETWEEN ROW OF PILES AND RING BEAM DURING EXCAVATION PROCEDURE

Practice shows that the cooperative action between row of piles and ring beam has a certain influence on the deformation and internal forces of retaining piles. On the basis of the constraint of ring beam on the retaining piles and the deformation coordination between them a flexing equation method considering the cooperative action between row of piles and ring beam is proposed in this paper.This method is more simple and practical. Its results can be Obtained by solving linear equation with computer, avoiding the complicated FEM (finite element method) calculation. The calculation results are compared with the measured ones and it is shown that they coincide with each other fairy well. The conclusion can be drawn that the cioser to the corner the pile is, the more significant the spatial effect is, and the effect may be neglected for the piles near the middle part of the ring beam for large and shallow excavation.