| Traditional load test is generally accepted as a most directly and reliable method for determining the bearing capacity of piles. Because the method need special reaction system, it will take more time and money and require high condition for test field. So it cannot be done randomly and widely, and cannot be done under hardly conditions. Load test is difficult to be carried with the development of higher bearing capacity and long length. As a new measuring technology, self-balanced method has its advantage on technology and economy. At present it is first load test method in north American and it has been applied in some province in china.The final purpose of self-balanced method is to get top Q-S curve, and determine ultimate bearing capacity of single pile based on it. Because of the difference of loading way and load transfer mechanism, its transferred result has some deflection with traditional load test. So how to transfer scientifically self-balanced test data into top load curve according to its actual working behavior, become the obstacle of its practical application.In accordance with actual forcing behavior and reaction mechanism between pile and soil, The article analyzes the relation between top part and bottom part, load transferring mechanism and difference with other loading way by ANSYS program. So the reliability of determine bearing capacity by self-balance method has been proved. Based on above three methods of transferring self-balanced test data into top load data have been provided andrelative computer program has been edited. The contrast test between self-balance test and top load test has been done applying the research of the article, it shows that the transferred curves are well consistent with top load curves, so it can satisfy the engineering requirement and its accuracy can amount to about ninety percent.Finally, some problems deserving further study are suggested based on concluding the whole research.
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