Research on Mechanical Model of Pipe Laying and Position Computing of 3D Date Set of High-Voltage Power Cable

With the technology maturity of horizontal directional drilling, pipe laying has become widely used for underground power transmission engineering construction. But, a unified mechanical model of pipe laying has not been established so far, deformation remains a frequent complication of sheath and insulation of high-voltage power cable due to traction accuracy that can not be guaranteed. Based on analysis of horizontal directional drilling characteristics, the mechanical model of pipe laying and the calculation formula of traction of cable were proposed and the determination method of model separation and classification was discussed, in which position computing of 3D date set by space vector theory was adopted. The feasibility and necessity of the model were verified by 110kV engineering example. The result indicated that not only the model can precisely predict traction of high-voltage power cable with less dispersion, its application can well avoid deformation of high-voltage power cable during cable lying.