leading-out and removing a cable from a buried pipe at the time of its replacement by setting protective circular bodies, at proper intervals in longitudinal direction, to the periphery of the protective cover of a cable, and laying the cable, in this condition, in a pipe buried underground....
The present invention relates to a system for carrying electrical energy in connections made by means of underground cables. In particular, it relates to a method of laying cables and a trench filler having a low thermal resistivity, used for laying underground cables for carrying electrical energy...
PURPOSE:To prevent the imposition of local, great loads to a cable, by mounting a snake snake guide to a shaft or an inclined shaft for connecting the ground and a laying hole of an underground deep portion, and by pulling the cable down while snaking the cable by means of the snake gu...
PURPOSE:To prevent occurrence of a damage of a cable or sagging of the cable and to facilitate laying of the cable in a buried duct by fitting cable guide tubes on the inner surface of the upper part of the buried duct and by inserting the cable thereinto. CONSTITUTION:A plurality of sho...
An underground cable installing apparatus is disclosed herein along with its method of operation. The apparatus utilizes a power driven land vehicle and an elongated cable laying plow blade supported
Provided is a method of laying empty pipes on the seabed, which method includes arranging a plurality of empty pipes in a bundle; arranging a bundle-strengthening element in a cavit
PROBLEM TO BE SOLVED: To lay a prefabricated porous pipe in underground excavation by machine construction. SOLUTION: A jig 2 for exclusive use for laying a piping having a plurality of horn-form support rods 21 is mounted on the arm end of a back hoe 101. Through operation of the back ...
Conduit inspection robot and small conduit after-laying method The construction of a new optical fiber cable communication system involves the costly operation of installing the cables underground, and, in addition, su... T Yamaguchi,S Yoshida,EE Engineer - International Conference on Electricity Distr...
The calculation of the continuous allowable current of an underground cable is determined by various characteristics. To calculate the allowable current in cables with alternating magnetic fields such as AC, special phenomena such as the proximity effect and skin effect must be applied. However, there...
generally 15 cm; and h is the maximum water depth of the side ditch, generally 25 cm. After deepening the side ditch, if the elevation of the ditch bottom is lower than that of the inverted arch bottom, 10 cm of bottom laying should be carried out at the bottom of the deepening ditch...