China Megatro 230kv DC Tension Angle Steel Monopole (60 DEGAREE), Find details about China 230kv Double Circuit Angle Transmission Tower, 230kv DC Lattice Tensiontower from Megatro 230kv DC Tension Angle Steel Monopole (60 DEGAREE)
Project name | 230kv transmission Line ) | ||
Voltage level | 230kv | Seismic intensity | |
Main meteorological conditions | Maximum design wind speed of M / sec. | ||
Basic type | Plate inclined Column Foundation ; The foundation is connected with the tower by inserting an angle connection. | ||
Tower type | 230kV :daxp\ dbxp\ dcxp\ ddxp\ ddexp\datr, total 283 base. | ||
Wire type | 230kV: ACSR/GA-1272MCM | ||
Ground type | 230kV: one uses the high strength-74.50 sq.mm, one uses the core OPGW-105 Optical cable. |
Serial number | Administrative name | General requirements |
One | Quality objectives | Strictly implement the laws, regulations and rules and regulations and the main contract requirements for the quality management of engineering construction in China and Laos, and subject to the requirements of the main contract. Meet the quality requirements of the main contract. |
Two | Security objectives | No personal death accidents occur, no major equipment, major construction machinery damage accidents, no major fire accidents, no major traffic accidents, no major environmental pollution accidents and major collapse (collapse) accidents, no large area of infectious diseases and collective accident poisoning. To eliminate the general safety accidents, do not occur in general and above equipment accidents, do not occur in general and above fire accidents. |
Three | Progress target | adhere to the "Project progress compliance with safety, quality" as the principle, actively take appropriate measures to ensure that the project opening, completion time and project milestones progress plan on time completion. Commitment to the construction of the project in 2018 years ago completed. |
Four | Environmental objectives | In the construction process strictly abide by the Laos state and local laws on environmental protection and the relevant provisions of the contract, and should be in violation of the provisions of the above-mentioned laws or contracts caused by environmental damage and personnel casualties and property losses bear full responsibility. |
Serial number | Drawing name |
1 | 1. design specifications and drawings,2. flat section positioning diagram, 3. Tower Schedule,4 Tower and basic schedule,5. tower Base structure diagram, 6.Equipment Material Table |
2 | Tower Structure Chart |
3 | 1. electromechanical construction drawing,2. assembly diagram of insulator string |
Process | Weaknesses | Pre - prevention and application |
Site Transport | Sand and stone transport, soil and debris easily mixed | 1 , reasonable choice of transportation mode, reduce transport links 2 , stacking site, away from debris stacking 3 , the measures to take the upper berth cover by the stacking material 4 and improve the quality consciousness of transportation personnel |
Basic Engineering | The foundation pouring system produces the pock, causes the vibration to not complete, runs the pulp, forms the foundation honeycomb pock | 1 , strengthen quality consciousness education and carry out technical disclosure 2 , strict control of water and cement ratio, mix ratio 3 , using concrete mixer to improve the workability of concrete 4 , personal vibration, supervision and inspection of special personnel 5 , template regular trimming, reduce the joint gap |
The top of the foundation has insufficient pre elevation value, which leads to the inner inclination of the force direction behind the erection of the Tower Group. | 1 , the preparation of basic construction work instructions, the basis of each base of the tower to raise the value of the site to control the construction personnel. 2 , the foundation pouring system, the strict control foundation top height difference, after pouring the system completes again reviews the foundation top level the elevation value. | |
Grounding Engineering | Grounding resistance is not easy to meet design requirements | 1 , the size of the grounding groove after excavation is strictly controlled 2 , the use of pure soil backfill and tamping 3 , if necessary, increase the laying length of the grounding body properly |
Tower Engineering | Deformation is easy when hoisting towers | 1 and reasonable arrangement of hanging point position 2 , tying up the wood on the tower 3 , hanging point mat small square wood and hemp packet spacer 4 , strict control of lifting weight 5 , strict monitoring, to guard against hanging material hooks |
Bolt tightening torque is not easy to meet design requirements | 1 , the implementation of liability contracting 2 , lengthened wrench fastening 3 , quality Inspector Force Torque Wrench Inspection | |
Pre-deflection of the tower does not meet the requirements | 1 , tower deflection control from the foundation. According to the number of tower rotation angle and design, construction experience, in the basic construction work instructions clearly given the elevation value, and reported to the supervision and approval. 2 , the foundation pouring system strict control foundation top level difference. 3 , the Iron Tower group before the inspection of the basis of the high value of the basic construction work instructions in accordance with the requirements of the lifting value. 4 , the line, to ensure that the tower to the force in the opposite direction side tilt isgreater than 0, and: The followingcorner tower ≤3%, above the corner tower ≤5%. | |
Rack Line Engineering | Wire wear and wire quality | 1 , handling and transportation in the process of taking protective measures 2 , draw up line measures, clear all kinds of tower-type line pulley hanging position and accessories installation Protection wire measures 3 , strengthen the wire protection , reduce the contact between the wire and the span frame 4 , the towers, the crossing point, the dangerous point of strict surveillance 5 , the coil should be set up to monitor the original defect of the conductor to enter the line |
Wire SAG | 1 , reasonable selection of observation files 2 , set up radian adjustment group, the person is responsible for |