State-of-the-Art and Prospecting of Inspection Techniques for Vertical Bearing Capacity of Bridge Foundation Piles

How to rationally determine the bearing capacity of foundation piles is of important practical engineering significance and economic values.What exact methods should be used for determining the bearing capacity of the piles has been very much the concern in bridge engineering circle and the methods having been widely used for inspection of the bearing capacity of the piles at home include the static load test method,high strain method and pile self-balanced load test method.The advantages and disadvantages of these methods are quite different and their adaptability is not all the same.In the recent years,with the steady development of the bridge foundation piles towards the large diameter,large tonnage and very long length,the pile self-balanced load test method has gradually become the firstly selected method for inspection of the vertical bearing capacity of the foundation piles that are of large tonnage and that are to be inspected under difficult conditions.