This work examined a new method of bi-directional static load testing for piles, referencing the Osterberg test. Measurements were taken, on a laboratory scale, using six models of piles driven into a box filled with sand. This method allowed for separate measurements of pile base and pile shaft bearing capacities. Based on the results, the total pile bearing capacity and equivalent Q–s diagrams were estimated. The results obtained show that the structure of the equivalent curve according to Osterberg is a good approximation of the standard Q–s curve obtained from load tests, except for loads close to the limit of bearing capacity (those estimates are also complicated by the inapplicability and ambiguity of a definition of the notion of limit bearing capacity); the equivalent pile capacity in the Osterberg method represents, on average, about 80% of the capacity from standard tests.

中文翻译：

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桩模型的双向静载荷试验

这项工作参考了Osterberg试验，研究了一种新的双向双向静载荷试验方法。使用六个模型的桩打入装有沙子的盒子，以实验室规模进行测量。这种方法可以分别测量桩基和桩身的承载力。根据结果​​，估算了总的桩承载力和等效的Q-s图。获得的结果表明，根据Osterberg的等效曲线的结构很好地近似了标准Q–s从载荷试验获得的曲线，除了接近极限承载力的载荷（这些估计也因极限承载力的概念的不适用性和含糊性而变得复杂）；奥斯特伯格方法中的等效桩容量平均代表标准测试的约80％。