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作 者:杨森林 陈旭 汪皓 张君 范锐 YANG Senlin;CHEN Xu;WANG Hao;ZHANG Jun;FAN Rui(State Grid Qinghai Provincial Electric Power Company,Xining 810008,China;State Grid Qinghai Electric Power Company Construction Company,Xining 810000,China;Chongqing Jiaotong University,Chongqing 400074,China;Qinghai Power Transmission and Transformation Engineering Co.,Ltd.,Xining 810001,China)
机构地区:[1]国网青海省电力公司,青海西宁810008 [2]国网青海省电力公司建设公司,青海西宁810000 [3]重庆交通大学,重庆400074 [4]青海送变电工程有限公司,青海西宁810001
出 处:《电力勘测设计》2024年第4期79-83,共5页Electric Power Survey & Design
基 金:国网青海电力公司科技项目(52283820000A)。
摘 要:为解决输电塔基础承载力不足的问题,采用一种可大幅提高基础承载力的新型掏挖类变截面根键式基础。通过对单层根键基础和双层根键基础的现场足尺试验获得2种基础在竖向上拔荷载下的荷载—位移曲线和基础桩身的内力分布图,通过对比分析得到不同根键布置形式与基础抗拔承载力的关系。结果表明:在相同荷载条件下双层根键基础的位移控制优于单层根键基础;与传统掏挖类基础相比根键基础承载力更加优秀;根键作用的发挥具有深度效应。In order to solve the problem of insufficient bearing capacity of transmission tower foundation,a new type of root bond foundation with variable cross-section is adopted,which can greatly improve the bearing capacity of the foundation.The load-displacement curves of the two foundations under vertical pulling loads and the internal force distribution of the foundation pile were obtained by field full-scale tests of the single-layer root bond foundation and the double-layer root bond foundation,and the relationship between the different root bond arrangements and the uplift bearing capacity of the foundation was obtained by comparative analysis.The results show that the displacement control of double-layer root bond foundation is better than that of single-layer root bond foundation under the same load condition.Compared with the traditional cutting foundation,the bearing capacity of root bond foundation is better.The effect of root bond has deep effect.
分 类 号:P642[天文地球—工程地质学]
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