Analysis and Application of Ultimate Bearing Capacity of Squeezed Branch Pile

The squeezed branch pile has become a relatively mature technology widely used in various projects. The study of the ultimate bearing capacity of a test pile has practical significance and value in actual engineering. However, a static load test requires enormous time and energy, and there is a limitation of the condition that the test pile shall not be damaged in the test. To explore the adaptability and fitting accuracy of the rational fraction method for the ultimate bearing capacity evaluation of test piles, the method was applied to the prediction by using the optimization method and good results were obtained. Based on the hyperbolic method, the rational fraction method is presented, the initial value of the rational fraction method is derived, and solving procedures of predicting the ultimate bearing capacity of the test pile are established. The method is applied to engineering examples to predict and compare load value with other methods. Take the load value corresponding to the settlement of 40 mm as the ultimate bearing capacity, the results demonstrate that the theoretical data of the rational fraction method is relatively consistent with the measured value and emphasis on safety. From the perspective of the deduction process, the objective function set in the rational fraction method is simpler and the fitting accuracy is generally higher, which can meet the need of high accuracy in prediction or design.