Application of Self-balanced Method to Detect Bearing Capacity of Large-diameter Rock-socketed Piles at inland High-piled Wharf

The self-balanced method is adopted to test the bearing capacity of large-diameter and rock-socketed cast-in-place pile in high-piled wharf located at Inland River and the distribution characteristics of Q-s curve, internal force, tip resistance, side friction and other factors of the piles under load is discussed. The test results indicate that the tip resistance of S1 and S2 respectively account for 53.38% and 53.60% of overall bearing capacity and the side friction of S1 and S2 respectively account for 46.62% and 46.40% of overall bearing capacity. Both the tip resistance and the side friction can show their maximum and both can meet the design requirements. For test pile S2 under horizontal load, its maximum bending moment is located in the place 3 times the pile diameter far from the ground where its shear force is zero. While the moment approaches zero near the rock-socketed pile end, which indicates that the rock at the end of the pile give full display of its embedment function. Through experimental analysis, the rationality of the design of the large-diameter and rock-socketed cast-in-place pile is verified, which provides a basis for optimizing the structural type of high-pile wharf, reduces the wharf project cost, and also provides a reference for the design of large-diameter and rock-socketed pile of inland high-pile wharf of this kind.