POLE FOR OVERHEAD SYSTEM TO BE ERECTED IN HEAVING GROUND Russian patent published in 2008 - IPC E02D27/35 

FIELD: construction and operation of railroad overhead system to be erected in adverse subgrade conditions, namely in permafrost conditions and deep seasonal heaving ground freezing.

SUBSTANCE: method involves forming bored pile having lower widened part in ground in area of pole erection; connecting pile with overhead system pole at height of 0.6-0.8 m over ground surface with the use of platform horizontal welded joint through embedded members built in pile head and pole. Well-known discharge impulse technology is used for pile erection. Said discharge impulse technology provides pile anchoring in permafrost ground and increases pile resistant to ground heaving forces. Widened pile part provides decreased length of pile anchoring in permafrost ground.

EFFECT: increased conical reinforced concrete pole stability, decreased labor inputs and reduced pre-stressed reinforcement due to decreased length of pile anchoring in permafrost ground and reduced pile section within active heaving zone, as well as decreased material consumption and labor inputs for joint creation between foundation and pole.

3 dwg