论文部分内容阅读
洞桩法地铁站隧道中边桩的横向变形是重要的力学效应之一。采用模型试验和数值模拟方法,分析了边桩的直径、间距、桩底埋置深度等参数对桩身横向变形规律的影响。研究结果表明:增大桩径和减小桩间距都能有效减小桩身横向位移,而桩底埋置深度加深对桩身横向位移影响不显著,其取值主要应考虑边桩的整体稳定性和竖向承载能力;在相同控制位移要求下,增大桩径对最大横向位移的控制效果优于减小间距对位移的控制效果。
One of the important mechanical effects is the lateral deformation of the pile in the subway station tunnel. The effects of parameters such as the diameter and spacing of side piles and the buried depth of pile on the lateral deformation of piles were analyzed using the model test and numerical simulation. The results show that both the increase of pile diameter and the decrease of pile spacing can effectively reduce the lateral displacement of the pile, while the deepening of the pile bottom depth has no significant effect on the lateral displacement of the pile. The overall stability of the pile should be considered The vertical and horizontal bearing capacity of the pile diameter is higher than that of the smaller one. The control effect of increasing the pile diameter on the maximum lateral displacement is better than that of reducing the spacing.