摘要
混凝土板条与型钢支架联合的斜置角锥装配式基础通过在支架布置型式与连接方式上的改进与优化,使得基础受力更加合理,可有效节约材料用量。通过在回填黏土中开展与塔腿主斜材一致的受拉、受压真型试验,模拟基础实际受荷工况,分析其荷载位移曲线、地表竖向位移、地表裂缝、型钢支架应力应变关系及基底土压力分布规律等,验证其受荷力学性能与承载机理。试验结果表明,基础的极限上拔承载力达到设计荷载的1.5倍、极限下压承载力达到设计荷载的1.8倍,型钢支架仍处于弹性状态,理论计算值与试验值基本吻合,可满足设计要求,为其在输电线路工程中的试点应用提供技术参考。
Through modifications and improvements in layout type of scaffolds and connection mode,the eccentric assembled foundation consisting of concrete laths and angle steel scaffolds can improve foundation force bearing and effectively save steel consumption.Real-model tensile and compressive tests are conducted on the backfill clay along direction of main member and diagonal member of tower leg.Through analysis of load displacement curves,steel bracket stress strain relationship,surface cracks and base soil pressure distribution law,mechanical performance and fault status are tested and verified.The ultimate tensile bearing capacity of the eccentric assembled foundation is 1.5 times that of the design value,and the ultimate compressive bearing capacity is 1.8 times.The basic structure is still in elastic state and can meet design requirements under those conditions.The results can provide reference for future engineering applications in transmission line.
作者
张强
郑卫锋
赵庆斌
ZHANG Qiang;ZHENG Weifeng;ZHAO Qingbin(State Grid Corporation of China,Beijing 100031,China;China Electric Power Research Institute,Beijing 100192,China;Sichuan Electric Power Design&Consulting Co.,Ltd.,Chengdu 610016,China)
出处
《中国电力》
CSCD
北大核心
2018年第2期1-6,共6页
Electric Power
基金
国家电网公司科技项目(GCB17201500141)~~
关键词
输电线路
装配式基础
型钢支架
十字焊接板
承载性能
transmission line
assembled foundation
pyramid scaffold
cross-shaped welded plate
load bearing capability
