Because of a poor construction quality control, the bearing capacity of an end-beating pile failed to meet the requirements of the designed beating capacity of the building. In order to solve the problem, a simple and convenient method is proposed in this paper, which is drilling a hole at the center of the pile and grouting with high pressure to strengthen the end-beating pile. For the piles that entered into the weathered rock and the sediments at the pile end was thicker than 5 cm, just borehole the pile and grunting to enforce the pile. For the piles that did not reach the weathered rock, besides boreholing and grunting the piles, the I-shaped steel micro piles should be added to reinforce the end-beating piles. For the two kinds of piles mentioned above, different methods for calculation the bearing capacity of the piles are developed.
bearing capacity； reinforcement； high pressure grouting； micro pile