输电线路桩板基础基桩的内力与变位计算  

CALCULATION OF INTERNAL FORCES AND DEFLECTIONS OF SINGLE PILE IN THE GROUP PILE FOUNDATION OF TRANSMISSION LINES

作　　者：邹丹[1,2] 贺怀建[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《岩石力学与工程学报》2015年第3期639-646,共8页Chinese Journal of Rock Mechanics and Engineering

摘　　要：通过对桩板基础的受力进行深入分析后,首先提出利用板顶地基土的竖向抗力系数计算其上拔抗力,并基于"m"法的幂级数解答,按桩顶处土的水平抗力系数不为0推导基桩桩顶刚度系数,然后通过建立底板受力平衡方程求出底板的变位,再利用底板的变位求出基桩的内力和变位,从而获得一种桩板基础基桩内力与变位的计算方法。最后,利用该方法对一个四桩桩板基础的基桩内力和变位进行计算并对结果进行分析和比较。Through the force analysis of the group pile foundation,a vertical resistance coefficient of soil on the pile cap was proposed to calculate the uplift resistance and the stiffness coefficients of the pile top with the horizontal resistance were deduced based on the‘m’method. The deflection of the pile cap was calculated according to the force equilibrium equations and the internal forces and deflections of single piles were obtained with the deflection of the pile cap. Thus a method for calculating the single piles′ internal forces and deflections of the group pile foundation was obtained. Finally,the single piles′ internal forces and deflections of a group pile foundation with four piles were calculated under the uplift and compression conditions and the results were analyzed.

关 键 词：桩板基础 内力 变位 上拔 下压 

分 类 号：TU473.1[建筑科学—结构工程]