| 摘要 |
A construction of underground cable for a high voltage electric wire is provided to allow a protection structure of the underground cable to maintain a primary function by making a wrinkled connection pipe extended in case of generating subsidence of ground on soft ground. In a construction of underground cable for a high voltage electric wire, a display board(10), coupled with a burying nut(15) of an upper block(20), shows a name representing a kind of the underground cable such as an electric wire and a communication wire on a rectangular board(11) thereof. The upper block(20) includes a round shape groove(21) on an upper face of a semi-circle section shape body, the burying nut(15) inserted/fixed to the round shape groove(21), and a guide groove(22) formed on a flat face facing the round shape groove(21). A support unit(30) formed as a žª shape with two I-shape units includes a horizontal hole penetrated horizontally on a web of lower part and a plurality of coupling holes 1(32) formed on flanges of middle and lower parts vertically. A flange of the upper part is inserted into the guide groove(22) of the upper block(20) and then fixed and the support unit is buried on an underground. A wrinkled connection pipe(40) protects an outer cover of the underground cable(C) such as the electric wire and the communication wire passing through the horizontal hole of the support unit(30). One side of the wrinkled connection pipe(40) is coupled with the support unit(30) by coupling a coupling bolt(60) with the coupling hole 1(32), a wrinkled portion(41) and a flat portion(42) at both sides of the wrinkled portion(41) are formed as one body, and a plurality of coupling holes 2(43) is formed on the flat portion(42). A rectangular pipe(50) is installed on a space between the plurality of support units(30). Both sides of the rectangular pipe(50) are open and a plurality of coupling holes 3 is formed on the both sides vertically, and the wrinkled pipe(40) is connected with the rectangular pipe(50) by inserting the coupling bolt(60) to the coupling holes 3. |
