自平衡法在桩基承载力检测中的应用

Application of Self-balanced Method for Pile Bearing Capacity Test

介绍了一种新的静力试桩法——自平衡法 ,因其方法独特、操作简便、试验精度高等特点已在欧美等国家得到了广泛应用。介绍了该法的测试原理、试验装置、测试步骤及桩极限承载力的确定方法 ;分析了该法与常规静载试验方法测试原理的不同之处 ;提出了用荷载相等 ( Q1i=Q2 i)的原则 ,将该法测试结果转化为常规静载试验结果的处理方法 ,提出的处理方法使桩极限承载力的确定更加容易 ,而且得到的桩极限承载力数值偏于安全 ,使自平衡法更具有实用性 ;最后通过一个实例介绍了该法在实际工程中的应用。

A new method of loading test for pile bearing capacity-self-balanced method is introduced in this paper. The method has been widely used in Euramerican countries for its characteristics of being unique, easy handling and high experimental precision. The test principle, procedure and equipment of this method and determination of pile bearing is introduced; the differences of test principle between this method and traditional loading test are analyzed; and a new method based on loading equality principle that converts the results of self-balanced method to the results of traditional loading test for pile bearing capacity is put forward. By this method, it is easier to determine pile bearing capacity and the value of pile bearing capacity is safe. So the self-balanced method has practicability; and the method is applied in actual engineering.