Operation system 1.1 implementation documents of construction operation: design drawings, technical disclosure documents, construction organization design, special safety measures for high-altitude operation, instructions for use of constant tension paying off vehicle, and wire parameters; 1.2 Mandatory specifications: Provisional Standard for Construction Quality Acceptance of Electric Traction Power Supply for Passenger Dedicated Railway, Standard for Construction Quality Acceptance of Electric Traction Power Supply for Railway; 1.3 before construction, the technical personnel shall make a written technical disclosure to the on-site construction principal.
One anchor lifter shall go on the pole, cooperate with the personnel on the operation vehicle to hand over the compensation pulley to the personnel on the operation vehicle, and check whether the compensation rope is in the wheel groove.
Put on the thread guide rope, and pass it to the personnel on the operation vehicle through the telescopic rod of the stringing vehicle, and do a good job of turning back.
(2) Disassemble the operation vehicle and the stringing vehicle, position the platform of the operation vehicle, and the anchor lifting personnel shall lower the pole to complete the anchor lifting.
(2) The um1 operation vehicle follows the stringing vehicle.
The stringing tension should be selected according to wire material, rated tension and other factors, and should not be less than the winding tension, and the deviation of stringing tension should not be greater than 8%.
The technical principal at all levels shall make sure that the instructions of the superior, the handling opinions of some technical problems, the technical measures and the changes of the construction scheme are disclosed to the direct construction principal before the process starts, and both parties shall sign and confirm each other.
3.4 guiding and laying (1) the driver of the stringing vehicle wa20 starts the stringing vehicle to run at a constant speed, and the other operator observes the line trend and the operation of the um1 operator, and instructs the driver to swing or lift the telescopic rod.
(5) When the weight overstretch method is adopted, the weight shall be added at both ends of the lifting and lowering anchors in stages, and the weight of each additional weight shall be 20% of the total weight.
At this time, the commander and the windlass shall contact at any time to master the change of the windlass.
(2) The special paying off pulley shall be used for the erection of messenger wire and contact wire, and at least 3 S-hook pulleys shall be hung evenly within each span for the erection of contact wire.
(7) The anchor lifter shall arrive at the site in advance to check whether the pillar strength, stay wire, weight and compensation meet the requirements.
However, the minimum stringing tension of silver copper conductor shall not be less than 8kN, and that of magnesium copper and tin copper conductor shall not be less than 70% of the working tension.
Open the wire reel and note whether the wire head direction is correct.
2.
It is forbidden to overstretch two lines at the same time for the same transfer column, turnout column, double track cantilever column and hard beam.
See Fig.
After the installation of the center anchor of Um2 operation vehicle is completed, return to the anchor column, lift and rotate the operation platform, and remove the fixed iron wire and steel wire clamp of the compensating weight string.
The personnel on the operation vehicle shall check whether the anchor is threaded according to the setting out schedule, and connect the anchor to guide the compensation according to the correct threading method.
There are three methods for OCS to eliminate the influence of new wire creep of catenary and contact wire, namely, rated tension over pull, over pull method of adding weight and mechanical over pull method.
Adjust the compensation a value to a proper value, and fasten the conductor compensation rope with three steel wire clips in a staggered manner.
After stopping at each suspension point, hang a closed pulley.
1.
(5) The technical personnel shall prepare the setting out plan and schematic diagram in advance according to the design drawings, and send one copy to each person in charge of construction.
The setting out speed should be 3 ~ 5km / h and should be kept constant.
(4) After the constant tension stringing vehicle wa20 and the working vehicle um1 pass through the middle anchor column, the working vehicle Um2 puts the catenary of the middle anchor column into the catenary seat to install the catenary and the center anchor of the contact wire.
Um2 operation vehicle personnel go to the operation platform to assemble insulators and other anchor parts, and rotate the platform to the front of the anchor column.
(4) During construction, how to ensure that the initial elongation of the new line is basically exhausted at one time, and how to make the support device, hanging string and compensation assembly installed in place at one time is the key of construction technology.
During unloading, both sides of the anchor section shall be lifted and lowered at the same time.
When the iron wire of the weight at the anchor lifting position on the pillar is just not stressed, the stringing car stops moving, and the um1 operation car goes to the lower anchor rod to drop the anchor..
After passing through the suspension point, hang a temporary hanging string in the middle of the span, with a minimum of 3 hanging strings per span.
(3) Check whether the quality and quantity of tools and materials meet the requirements.
The stringing of messenger wire and contact wire shall be overstretched or other measures shall be taken to eliminate the influence of new line creep.
(4) Check whether the wire reel number is consistent with the anchor section number.
Personnel and machinery configuration 2.1 labor organization 3.
2.7-1 for the method.
Construction operation standard 3.1 construction requirements for catenary and contact wire erection (1) the catenary should be stringed with constant tension, and the contact wire should be stringed with constant tension.
(3) During tension erection of contact wire, temporary reinforcement measures shall be taken for column assembly at curve section and conversion column.
After the OCS is erected, the initial elongation caused by the creep of the new line shall be overcome by over pulling or other measures.
During over pulling, special personnel shall be assigned to protect the curve joints.
In case of any abnormality, the construction shall be stopped immediately and the problem shall be solved in time.
The messenger wire and contact wire shall be overstretched respectively.
(2) The cantilever shall be reinforced every 4-5 spans.
(For the installation method of ratchet compensation device, see the operation card) 3.3 Anchoring (1) After receiving the line blocking command, the stringing unit runs to the position of the anchor lifting pillar.
The tension stringing vehicle wa20 and the working vehicle um1 continue to move forward.
(5) When the rear edge of the stringing car WA20 body is flush with the lower anchor rod, increase the tension by about 100 kg, lock the tension wheel, and tighten the wire at a speed of 1 km/h.
(6) The tension of the messenger wire and contact wire shall meet the design requirements, and the allowable deviation of the weight of the compensating weight string shall be ± 1%.
3.2 preparation for stringing (1) check whether the mast assembly and compensation device of the stringing anchor section are installed correctly, and investigate the interference of power lines near and above the line within the range of the erected anchor section.
(6) The dispatcher shall submit the request for stringing and the stringing operation schedule to the station in advance, and propose the written construction requirements for blocking the line to the station attendant.
(3) Repeat items 1 and 2 above for constant tension stringing truck WA20 and operating truck UM1 until the anchor post is lowered.
