PHC管桩在输电线路应用中的抗拔分析及改进

Anti-pulling analysis of application of PHC pipe pile in transmission line and its improvement

针对国家建筑标准设计图集中桩型不适用于抗拔桩的问题,根据PHC管桩及输电塔基础的特点,对管桩桩身抗拉强度、端板抗剪强度、桩的接头方式、桩与承台连接等进行了计算和分析,提出了相应的改进方案,并通过某工程进行了试验验证。结果证明,PHC管桩经改进后,能够提高桩身的抗拉强度,解决PHC管桩抗拔性能差的问题。

Since the pile shape cannot be used for anti- pulling pile in the design diagrams of national construction standards,according to the characteristics of PHC pipe pile and transmission tower foundation,this paper analyzes the tensile strength of pipe pile,shear strength of end- plate,joint mode of pile,and connection of pile and cap,and proposes relevant improvement scheme which is verified by a project. The result proves that the improved PHC pipe pile,the anti- pulling capacity being strengthened,is able to enhance tensile strength.