摘要
用双曲线方法对110根挤扩支盘桩的极限承载力进行预测,结果表明:由于支盘桩受力性状复杂,加载前期和中期预测精度较高,后期较低,不能将误差范围控制在15%以内;支盘桩的沉降曲线出现台阶时预测值与实测值误差较大;支盘桩极限承载力的预测精度与工程地质条件和桩本身的参数密切相关,同样条件下预测精度比较接近;总体看,对直杆桩的预测结果优于支盘桩。
The ultimate bearing capacity of squeezed branch pile is predicted by hyperbola method based on 110 piles from different site. The results show that predicted curve is agree well with the filed measurement curve below ultimate load . the difference between the two curves is increasing when the top load of pile is approach to the ultimate load. the degree of error can not be constrained in 15% because of the complex transfer mechanism of this kind of pile. The predicted results of friction pile are better than that of squeezed branch pile. The precision of forecasting ultimate bearing capacity of single squeezed branch pile is greatly relative to the condition of the property of soil and pile itself.
出处
《铁道建筑技术》
2005年第6期57-59,共3页
Railway Construction Technology
关键词
双曲线法
挤扩支盘桩
极限承载力
hyperbola method
squeezed branch pile
ultimate bearing capacity
