横向受载超长PHC管桩计算方法

Calculation method of laterally loaded super-long PHC pile

通过对p-y曲线的主要影响因素进行分析,结合现场试桩资料,以规范推荐的p-y曲线计算方法为基础,选取合适的土的特性参数与强度指标,建立新的p-y曲线法,并与m法、NL法、规范p-y曲线法进行比较,结果表明桩身最大弯矩的计算值都与实测值比较接近,但桩顶位移各种算法相差很大,按新的p-y曲线法的计算值与实测值吻合程度最好。

Based on the analysis of main influential factors ofp-y curve and a project field testing result and according to the calculation method suggested in the code ,this paper selects suitable characteristic parameters and strength index of soft clay and establishes a newp-y curve method and compares with calculation results of m-method, NL-method and standard p-y curve method. The results show that the calculated value and measured value of the maximum bending movement of pile integrity are close to each other, but there are significant differences among different calculation methods and the calculated value of the suggested p-y curve is the best one to fit the measured value.