Transformation of load-settlement curve based on load transfer at pile-soil interface

The self-anchoring test is a new method to detect the bearing capacity of pile foundation.The indoor model tests and the numerical simulation are used to explore the difference of the Q-S curves between the static load tests and the self-anchoring tests, and to realize the transformation of the results from the self-anchoring to static load tests.The results show that the settlement of foundation piles in the static load tests is larger than that of the self-anchoring tests, the resistance is developed in advance and its ultimate bearing capacity is smaller.Both the ratios of the ultimate bearing capacity and the elastic slopes of Q-S curve of the self-anchoring tests and static load tests are exponential with the anchoring depth of the foundation piles.Based on the parameter analysis of foundation soil of the measured data, the logarithmic load transfer model is proposed, the bearing behavior of the foundation piles can be solved by the iterative algorithm, and the load transfer at pile-soil interface can achieve the transformation of the Q-S curve of the foundation piles from the self-anchoring tests to the static load tests, which is verified by the indoor model tests.The research results may provide a useful reference for testing the bearing capacity of the self-anchoring tests in pile foundation engineering.