宁江松花江特大桥桩基承载力模拟试验研究

Research on Simulation Test Method for Pile Foundation Bearing Capacity of Songhuajiang Grand Bridge in Ningjiang

在宁江松花江特大桥试桩中采用模拟试验法和自平衡试验法两种方法测试桩基承载力,其中模拟试验法是通过室内中型剪切试验确定桩身与各地层间的c,φ值,从而得出桩侧摩阻力,由桩端弱风化泥岩三轴试验确定桩端承载力,两者之和为桩基承载力。通过模拟试验法与自平衡法对桩基承载力的对比研究,可以得出计算更简单、效果更好的方法。

In testing the pile of Songhuajiang Grand Bridge in Ningjiang, the bearing capacity oi pile tounclanon by simulation testing methods and self-balancing testing method is tested. With the simulation test method, c and φ value between the pile body and the stratums are determined by the interior medium shear test, and the pile lateral friction resistance is obtained then. Then bearing capacity of pile tip is determined by the weakly weathered mudstone triaxial test, the sum of the above two is equal to pile foundation bearing capacity. Through the comparative study of two methods, the simpler and more effective methods can be obtained.