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http://dx.doi.org/10.5762/KAIS.2013.14.1.411

Moment Resisting Behaviors of Railway Electric Pole Foundation According to Form Work Methods  

Lee, Su-Hyung (Korea Railroad Research Institute, Metropolitan Transportation Research Center)
Lee, Seung-Hyun (Dept. of Civil Engineering, Sunmoon University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.1, 2013 , pp. 411-417 More about this Journal
Abstract
The moment responses of electric pole foundations for a railroad were investigated using real-scale load tests. Large overturning moments were applied to two square rigid piles with a 1.1 m width and a 2.2 m embedded depth. Two different installation methods-with and without a form-were applied to evaluate the influence of the form work on the moment capacities of the foundations. The reduction of ground strength caused by the excavation without a form is more pronounce than the decrease of frictional strength due to the smooth concrete surface with a form. From the test results, it is found that the current design method which applies a proportional coefficient to consider the effect of a form work is not appropriate. When the normal and frictional stressed is considered separately, the effect of a form work can be estimated reasonably by reducing the friction angle between soil and foundation by 20%.
Keywords
Pole foundation; Railroad; Overturning moment; Real-scale; Moment capacity; Form work;
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