对称双斜高桩基础水平承载力相似模型试验研究

Model Test on Bearing Capacity of Symmetrically Inclined Double High Piles under Horizontal Load Based on Similarity Theory

倾斜高桩基础主要用于水平荷载较大的建(构)筑物基础。文中运用相似理论推导了双斜高桩基础的相似准则并应用到模型试验中,模型试验研究了对称双斜高桩基础在5°、10°、15°和20°等不同倾角下的水平承载力特点,并通过对比法分析了倾斜高桩和倾斜桩的关系。研究发现:随着对称双斜高桩倾斜角度的增加,模型桩的水平承载力越来越大;但当角度过大时其承载力反而降低;通过对比对称双斜桩可以看出,对称双斜高桩的水平承载力较对称双斜桩要小。同时基于相似理论的模型试验设计可以更好反应试验原型的状态,使模拟结果更真实可靠。

Inclined high pile foundation is mainly used for the construction(structure)of large horizontal loads.In this paper,the similarity criterion is used to design the model test of double high pile foundation.The bearing capacity characteristics of the symmetrically inclined double high piles is studied under different inclination of5°、10°、15°and20°.Contrast method is employed to analyze the proportional relation between the bearing capacity of Inclined high piles and inclined double piles.The study indicates that as the pile inclination increases,the horizontal bearing capacity of symmetrically inclined double high piles increases.But the bearing capacity decreases when the angle is too large.We can see the horizontal bearing capacity of the symmetrically inclined double high piles is smaller than the symmetrically inclined double piles.At the same time,the model test design based on similarity theory can better reflect the state of experimental prototype,and make the simulation results more realistic and reliable.