摘要
为探究螺旋锚群锚基础在江苏砂土地区高压输电线路的受力变形特征及适用性,从而进一步拓宽螺旋锚基础在江苏地区输电线路的应用范围。文中以江苏泰州-海阳500 kV输电线路为例,开展砂土地区三锚与四锚承台抗压、抗拔和水平荷载的原位静载试验,对螺旋锚群锚基础的抗拔、抗压、水平承载性能进行系统全面的研究分析。结果表明50 mm位移条件下四锚承台的抗压、抗拔极限承载力(3048、2072 k N)明显高于三锚承台(2556、1644 kN);水平荷载试验中,两种形式均满足设计要求,但四锚承台表现出更好的延性及更小水平位移。研究结果验证了该基础在江苏砂土地质中的可靠性,为工程应用提供试验经验指导与设计优化参考。
To investigate the mechanical and deformation characteristics as well as the applicability of helical anchor group foundations for high-voltage transmission lines in sandy soils of Jiangsu Province,and to further expand their application scope,this study takes the 500 kV transmission line from Taizhou to Haiyang in Jiangsu as a case study.In-situ static load tests were conducted on three-anchor and four-anchor pile caps under compression,uplift,and horizontal loads in sandy soil areas.A systematic and comprehensive analysis was performed on the uplift,compression,and horizontal bearing capacities of the helical anchor group foundations.The results show that under a displacement condition of 50 mm,the ultimate compressive and uplift bearing capacities of the four-anchor pile cap(3048 kN and 2072 kN,respectively)are significantly higher than those of the three-anchor pile cap(2556 kN and 1644 kN).In horizontal load tests,both forms meet design requirements,but the four-anchor pile cap demonstrates better ductility and smaller horizontal displacement.These findings verify the reliability of this foundation type in sandy soils of Jiangsu and provide experimental guidance and design optimization references for engineering applications.
作者
王驰
朱姣
沙俊强
WANG Chi;ZHU Jiao;SHA Junqiang(State Grid Jiangsu Electric Power Co.,Ltd.Construction Branch,Nanjing 224400,China)
出处
《低温建筑技术》
2025年第7期69-73,共5页
Low Temperature Architecture Technology
基金
国网江苏省电力有限公司建设分公司技术服务项目(SGISJSOOXMIS2400286)。
关键词
螺旋锚群锚基础
高压输电线路
静载试验
抗拔极限承载力
helical group anchor foundation
high-voltage transmission line
static load test
uplift ultimate bearing capacity
