桥梁基桩竖向承载力检测技术发展现状及展望

如何合理地确定基桩的承载力,具有重要的工程实际意义和经济价值.用什么方法确定基桩的承载力,一直是桥梁工程界十分关心的问题.国内得到广泛应用的基桩承载力检测方法有静载试验、高应变法和自平衡试桩法,各种检测技术的优缺点不同、适用性也不尽相同.近年来,随着桥梁工程桩基朝着大直径、大吨位、超长桩方向的不断发展,自平衡试桩法已逐渐成为大吨位、困难环境条件下基桩竖向承载力试验首选的检测方法.

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.