围护桩与工程桩共同作用的分析与计算

Analysis on Interaction of Fender Piles and Engineering Piles

“一桩三用”技术将排桩围护体系加以利用 ,围护桩除了在基坑开挖过程中作为挡土结构之外 ,还可作为建筑物工程桩承担上部结构荷载或作为地下室抗浮桩 ,同时通过桩墙合一技术使排桩与地下室外墙形成复合结构共同抵抗水土压力。本文从三桩模型入手 ,推导出条形基础下不同刚度桩桩顶反力的解析式 ,并引入相互作用系数考虑桩与桩之间的共同作用。通过用MATLAB编写的计算程序分析了多桩情况下的荷载分配情况及影响因素。

The fender piles can be used as engineering piles to resist the loads of upper structure or as anti-floating piles for the basement, as well as the retaining structure during the excavation of foundation pit, which is called as the thecnique of three usages of one pile. The fender piles and the basement walls are combined to resist the earth pressure and groundwater pressure. Based on the three-pile model the formula of reaction on the top of piles is presented for strip footing with different stiffness.The coefficient of interaction is used to consider the interaction among piles, and a programmer written with MATLAB is developed to analyze the load contribution and the influencing factor with multiple piles.