高压输电线路杆塔根键基础承载特性研究OA

For the problem of insufficient bearing capacity of transmission line's tower foundation,the root foundation is adopted for its structural and economic advantages,which can greatly improve the bearing capacity of the foundation.In this paper,field tests of the load-displacement curves between single-layer and double-layer root foundations and traditional metal fabricated foundation under the lateral load are compared and analyzed,and the stress of main reinforcement and bending moment of root foundation under lateral load are also analyzed.The results show that the lateral bearing capacity of root foundation is much better than that of traditional metal fabricated foundation.The lateral bearing capacity of double-layer root foundation is better than that of single-layer root foundation.The deformation of the double-layer root foundation at the tension side is greater than that at the compression side,which is in line with the rule that the displacement generated by the foundation under the action of lateral thrust is consistent with the direction of force application.The roots at the upper part of the double-layer foundation are less affected by lateral load,and the change rate of bending moment is small,while the condition of the roots at the lower part of double-layer foundation is opposite.