Specific method of moving high-voltage pole with t

Specific methods for moving high-voltage poles with cranes

in the mining area, electric poles are often moved due to production needs, That is, the permission of the work permit shall be obtained for pulling out the old wires (according to the grounding pole installed according to the dispatcher's instructions, a new pole is erected. However, due to the high voltage pole and the poor transverse strength, the pole is easy to be pulled out when it is pulled out, and a 15m pole is worth about 3000 yuan. Manual excavation and relocation of poles are laborious and dangerous. We use truck cranes and excavators to work together to move poles, and the effect is very good. Now take the displacement of two adjacent 15m 35kV high voltage support poles as an example to introduce its Specific methods

(1) go through the formalities according to the relevant provisions of the power company on power cut-off and transmission, and the pole transfer site must be attended by the personnel of the power supply management department

(2) excavate the new pole pit according to the requirements of the power department. Generally, the specification of the 15m pole pit is about 1.5m long, 1.5m wide and 2.7m high

(3) professional power construction personnel climb up to remove the high-voltage line and lightning wire from the fixed position of the pole and lower it (Note: when lowering, the slip rope must be tied to ensure safety), remove the pole grounding wire and level the site, so as to facilitate the access of truck cranes

(4) park the qy16a truck crane in a reasonable position. Since the working site is generally in the field with soft soil, in order to prevent accidents during the lifting process, wood must be placed under the support pad of the outrigger hydraulic cylinder. At the same time, carefully observe whether there are high and low voltage lines and buildings around that affect the lifting safety

(5) erect the main boom of the crane for the use of continuous exposure to extreme heat, and tie the steel wire rope to the lower part of the pole rung (not to the rung to avoid damaging the rung during hoisting); At the same time, the steel wire rope should not be tied too low, so as to avoid the deflection of "top heavy and foot light" after the pole is lifted. To control the state of the pole after lifting, a slip rope can be tied at the top and bottom of the pole before lifting

(6) slowly lift the main boom of the crane to tighten the steel wire rope for lifting the old pole; Then operate at the same time from both sides of the excavator rod, that is, dig a shovel on the left and dig a shovel on the right. This cycle until the excavation is completed, and the action should be light and soft. When encountering foreign matters, the operation must be stopped immediately, and the operation can be continued only after the situation is found out; When the chuck at the bottom of the old pole is obviously exposed, the crane can carry out the lifting operation (Note: the lifting action must be light and soft to prevent foreign matters under the pole). Since the pole is located between the suspended high-voltage lines and cannot be rotated, the pole should be lowered and lifted again from outside the high-voltage line, and then rotated to the position where the pole is to be erected

(7) in order to adjust the vertical position of the new pole, two slip ropes can be set at the middle and upper part of the pole before the pole is hoisted again

(8) after the pole is adjusted vertically, fill the soil into the pole pit and compact it. If the line pole inclines, the excavator bucket can be used to apply a little external force to the line pole. Do not apply too much force, otherwise the line pole fracture accident is very likely to occur

(9) due to the heavy weight of the high-voltage line itself, the truck crane can be used to re erect the high-voltage line and lightning wire to the designated position of the new line pole and fix it firmly

(10) shift the next pole. Pay attention to ensure that the high-voltage line on the pole has enough safety distance from the ground and effective span after the pole is shifted

(11) the supporting pole pit can be excavated by excavator, but if the pole is a corner pole, because it needs to bear lateral force, the lag ring end line on the tensile machine software is located on the left side of the parallel line, so it is best to excavate manually to avoid the pole toppling around the pole due to loose soil, rain and external force, which will cause a major power supply accident. Therefore, if the pole is excavated in a depression or slope, the moved pole must be prefabricated, and if necessary, the pole should be added 12. Pull the line according to step 2 to ensure its stable support