Proceedings - Second International Conference - Piling and Deep Foundations, 1987, Luxembourg, (DFI)
Steel Pile Foundations for Transmission Line Towers, as used in Western Europe
Alexander J. Vertraeten; Fundex Piling, The Netherlands
The design and construction of foundations for power transmission line towers present some special problems. This paper describes a system of design and construction for these foundations that was developed in Europe and has attained general use there because of its reliability and cost effectiveness. Transmission line foundations distinguish themselves by having to deal not only with compressive and lateral loads, but with uplift loads and, because of the wind (in some regions earthquakes), with dynamic loading. The construction of transmission line foundations distinguishes itself mainly in the great number of inaccesible locations involved, resulting in extensive geotechnical investigation and logistical problems in moving men, materials and equipment. This paper describes: -A foundation system for lattice and single pole tower transmission lines using steel tube, prefabricated piles. The system allows much of the work to be shifted from the field to the manufacturing plant, speeds up the work in the field, and creates highly reliable foundations. The Cone Penetration Test (CPT) based design method for transmission line foundations developed by the Delft Soil Mechanics Laboratory of the Netherlands. We generally consider the CPT, where applicable, to be the most reliable and cost effective method of geotechnical investigation available. The CPT based design method reduces costs by allowing the optimum choice of pile type and length of pile, and by minimizing "surprises" in the field. The methods and equipment used in installing the transmission line foundations.
|article #611; publication #40 (IC-1987)|