Design And Experimental Study Of Reactive Powder Concrete Pole And Supporting Foundation

In recent years,severe typhoons have occurred frequently in many coastal areas of China,causing serious accidents such as broken pole,inverted pole and inverted tower of transmission lines,which have threatened the safe and stable operation of transmission lines.However,under the special environment of salt decay in coastal areas,the service life of concrete poles is shortened,and there are safety risks when dealing with the extreme environment.Among them,the 10kV distribution line was the most severely damaged,and the traditional concrete poles could not meet the needs of safe operation of the transmission lines in coastal areas.The purpose of this research is to propose RPC poles with higher bearing capacity made of reactive powder concrete,and to improve the anti-overturning ability of the poles through the proposed new prefabricated foundation,so as to solve the problems of broken and inverted poles.The research results of this subject are as follows:1)Through the study of the mechanics performance test of the trial production of RPC pole,for the experimental evidences were provided for the theoretical calculation of RPC pole,verify the proposed by our previous prestressed RPC pole formula of flexural bearing capacity,and the partial prestressed RPC pole of the bending bearing capacity calculation formula for correction,for crack resistance under the normal use limit state,the average crack spacing,maximum crack width and deflection calculation formula for correction.2)Reference related specification prefabricated foundation for the design,through the base overturning test the whole process of the general rule of test phenomenon has been overthrown,by way of analyzing the test data,the influence of different assembly model of foundation rigidity,put forward the suitable for prefabricated foundation the limits of different assembly modes overturning moment calculation method and foundation rigidity calculation method.3)Limited bearing capacity of the finite element method of prefabricated foundation rigidity and foundation Angle are studied,comparing the calculated results and the prototype test data,the reliability of the numerical simulation and calculation parameters and the rationality of the calculation model is established in this paper,analyzes the embedded depth of foundation,assembly model and soil parameters on the basis of the influence of the resistance to capsizing.