大直径桩承载力的灰色预测方法

对于大直径桩 ,要通过现场静载试验来得到桩基础完整的荷载 沉降关系 ,以确定其极限承载力 ,无论是从加载条件还是测试技术上讲都是很困难的。因此 ,如何通过有限的测试数据来准确地预测大直径桩完整的荷载 沉降关系 ,进而确定桩的极限承载力 ,是工程界广泛关注的问题。运用灰色理论 ,建立了桩的荷载 沉降关系的GM(1,1)模型 ;论述了运用灰色理论根据有限的试验数据预测大直径桩完整的荷载 沉降关系的方法。通过对工程实例的对比分析 ,证明其理论可靠 ,预测结果的精度满足工程要求

Method of Grey Prediction for the Bearing Capacity of Large-diameter Piles

Owing to the fact that the bearing capacity of large diameter pile is very strong, to obtain the integrated relationship of load settlement of large-diameter pile by site test is very difficult,Whether to the load conditions or to the test techniques. So, how to accurately predict the integrated relationship of load settlement of large diameter pile, and then to define its bearing capacity by using limited test data is an extensively concerned problem in engineering. The GM(1,1)model has been established by means of grey theory ,and the prediction method of loads settlement relationship of large diameter pile has been discussed in this paper. By comparing with the test results of engineering example,it has been proved that this theory is reliable , and the precision of the prediction result is satisfiable for engineering.