侧向变位PHC管桩竖向承载力的分析与计算

近年来,对PHC管桩的各项性能的研究已日趋完善,但对于侧向变位PHC管桩的承载力研究的较少。实际工程中的基桩大都处于非理想受荷状态,各种的侧向变位对承载力有不同程度的影响。当入土的管桩在施加竖向荷载前存在一定的倾斜时,所施加的荷载就会在桩身中造成附加弯曲变形。本文分别以PHC管桩桩身截面抗拉、抗压强度为强度控制因素,应用横向受荷桩的通解法计算不同倾斜情况下管桩的内力矩,再结合竖向荷载推导承载力公式。

Load capacity of PHC pipe pile after lateral displacement

Recently the research on the ever performances of PHC pipe pile is perfect day by day,but there is few research on the lateral displacement.There is little ideal load-bearing pile in the practical work,and the different lateral displacements have different effects on the pile capacity.When the underground pipe pile has a bit lateral displacement before vertical load application,it will cause some additional bend distortion in the pile body.The tensile and resistance to pressure strength of PHC pipe pile body are the controlling factors in this thesis.The internal moment in the pile body under several different lateral displacement is obtained through General Solution for Laterally Loaded Piles, then the formula was deduced combining with vertical load.