This article relies on the engineering situation of a high-rise residential group. According to the anti- pulling test results of three large diameter soft rock embedded rock piles by self-balanced method, preliminarily analysis the equivalent conversion relationship of tension pile load displacement curve by self-balanced method. The results show that the self-balanced method of pile tensile force is particularly suitable for the single pile with high vertical pull resistance and the foundation piles that can not carry out traditional static loading tests under objective conditions at the site; increase the pile length can effectively increase the bearing capacity of the pile, the greater the difference in pile length, the more obvious that trend be; under the same load, the U-δ curve obtained from the self-balanced test of the anti-pulling pile is basically the same as the U-δ curve obtained by the traditional static load test, the U-δ curve can be obtained directly from the self-balanced test as the criterion for determining the tensile capacity.
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