摘要
依据1000 kV荷载设计出3个单桩、6个群桩的原型试验基础,选取淮南-南京-上海1000 kV特高压交流工程#25塔位的黏土地基为试验场地,开展了3个单桩、1个2×2群桩的单向上拔荷载工况以及2个2×2群桩的上拔+水平组合荷载工况的现场试验,获得了所有试验基础的荷载位移曲线、极限承载力。基于现场试验数据,反算出该试验场地的侧摩阻力、群桩效应系数及上拔力影响系数分别为24.59 kPa、0.93、0.84,为工程设计提供了理论依据。
Three single piles and six full-scale foundations for clump of piles were designed according to the load for 1000 kV transmission line.The tests were conducted on the clay base for the tower No.25 of the Huainan-Nanjing-Shanghai 1000 kV extra-high voltage alternating current project.3 single piles and 12×2 clump of piles were tested under the uplift load while 22×2 clump of piles were tested under the combination of uplift load and horizontal load.The load-displacement relationships and ultimate bearing capacity were obtained.According to the experimental data,the side friction,pile group effect coefficient and uplift load coefficient were calculated as 24.59 kPa,0.93 and 0.84,which provided the theoretical basis for the engineering design.
作者
谢枫
吕铎
陈培
XIE Feng;LV Duo;CHEN Pei(China Energy Engineering Group Anhui Electric Power Design Institute,Co.,Ltd.,Hefei 230601,China;State Grid Corporation of China UHV Construction Department,Beijing 100031,China;China Electric Power Research Institute,Beijing 102401,China)
出处
《电工技术》
2019年第23期124-125,共2页
Electric Engineering
关键词
输电线路
PHC桩
抗拔承载力
荷载位移曲线
水平力影响系数
electric transmission line
PHC pile
uplift bearing capacity
load-displacement curve
horizontal load coefficient
