The Joint Board Cable Foundation Ultimate Pullout Resistance Formula Derivation and Aided Program Design

As a new type of transmission line foundation developed by the author, joint board cable foundation has obtained an invention patent and has a good application in the transmission tower foundation of thick collapsible loess regions. The research on the ultimate tensile strength of the base plate will be the key to carry on this design. In order to do a better job in the general design of the base plate, the author starts with the research on the uplift resistance theory of joint board cable foundation, who has put forward uplift resistance theory of joint board cable foundation formula, simplified the formula, and derived the calculation formula of the uplift stability of joint board cable foundation. The author has calculated dimensionless coefficient by self-compiled program and has studied on the rationality of the simplified calculation formula. The results from the study indicate that the calculation formula of the uplift stability of joint board cable foundation is easy to use, dimensionless coefficient can be derived through using chinese procedure, the formula reduces the computational difficulty of lower plate uplift resistance, the rationality and accuracy of the formula are proved through the research on the rationality of the simplified formula.