Temporary use of heat external line project of Wuk

2022-08-03
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Construction organization design for temporary power supply of Gongzhufen West Extension (Wukesong Yuquan Road) thermal external line project Abstract: this project is the thermal external line of Gongzhufen West Extension (Wukesong Yuquan Road), Project No.: j06. Regular inspection of components: all pressure control valves, flow control valves, pump regulators and pressure relays, travel switches, thermal relays and other signal devices 5a043 The starting point of the pipeline is the terminal chamber of the thermal external line of Gongzhufen West Extension (Gongzhufen Wukesong) (15 points in the plan), and the ending point is Yuquan intersection (32 points in the plan). The total length of the pipeline is 2071m, and the design pipe diameter of the trunk line is DN1000, with a length of 2010 M; The North Branch of Yuquan Road has a pipe diameter of DN500 and a pipe length of 61m

key words: construction design of temporary power supply for thermal external line engineering I Preparation basis 1. technical code for safety of temporary electricity on construction site (JGJ46-2005) 2. construction organization design of thermal external line project of Wukesong Yuquan Road in West extension of Gongzhufen 3. load allocation calculation data of temporary electrical equipment on site 4. site electrician II Project overview and field exploration 1. project overview g. This project is the thermal external line of Gongzhufen West Extension (Wukesong Yuquan Road), Project No.: j05a043 The starting point of the pipeline is the terminal chamber of the thermal external line of Gongzhufen West Extension (Gongzhufen Wukesong) (15 points in the plan), and the ending point is Yuquan intersection (32 points in the plan). The total length of the pipeline is 2071m, and the design pipe diameter of the trunk line is DN1000, with a length of 2010 M; The North Branch of Yuquan Road has a pipe diameter of DN500 and a pipe length of 61m. The pipeline route is parallel to Fuxing Road, 24m from the middle and south of Yongzhong Road, both of which are shallow buried and excavated. In Wukesong Yuquan section, our company undertakes 1718\2 vertical shafts on both sides of the Fourth Ring Bridge, with a total length of 432 meters. The construction of crossing the Fourth Ring Bridge by shallow buried and concealed excavation method is adopted. The tunnel section size is 4.4m × 2.8 m, the whole line runs from west to east along the green space on the south side of Chang'an Street, and many tunnels are located under the municipal pipelines. It is adjacent to the multi-storey building in use. A total of 2 underground shafts are designed, and the construction period is expected to be 5 months. Therefore, the whole project has large quantities, high requirements and heavy tasks. In line with the purpose of "quality first and safety first", our company has carefully organized and planned, and carefully implemented it in strict accordance with the relevant provisions of the national "technical code for safety of temporary electricity use on construction site", so as to achieve safe construction and ensure the project quality to complete the task on time. II Preparation instructions I. The design and preparation of the organization takes full account of our company's resource conditions and capabilities, especially based on our company having a high-quality, high-level and efficient team and long-term management personnel engaged in temporary power construction. ii. The organization has learned from the rich practical experience accumulated by our company in the temporary power installation projects over the years, and adopted the advanced processes and methods of some domestic excellent projects. III. The design and preparation of the organization also fully consider the construction characteristics of the project. 3、 Field exploration the project is located at the south side of West Chang'an Street. According to the data provided by the design institute and field exploration, there are many obstacles such as underground pipelines, telecommunications, cables, gas and sewage. There are no high-voltage and low-voltage lines at the construction shafts around the construction site on the ground. There is an asymmetric fatigue test at 1m south of the tunnel, which can be divided into one-way and two-way load fatigue tests. 0kv high-voltage cable trench can provide power for the construction transformer, For construction. 4、 Determine the location and direction of power incoming line, transformer, general distribution box, distribution box, etc. 1. Determine the location and direction of power incoming line, transformer, general distribution box, etc. according to the geographical location of transformer installation provided by Party A, a transformer is used for multiple shafts in the section (Wukesong Yuquan Road), and the specific supply location is from west to East, i.e. from box transformer to 18 . Since the box transformer provided by Party A is far from the construction shaft (in the east of the gate of the mechanical equipment research institute) and 200m away from well 18, it brings a lot of inconvenience to the conductor erection. According to the actual calculation and consideration of power consumption and voltage drop, 70 square meters of cables are used for power supply, and 50 square meters of cables are used from 18to 16. 2. The location and direction of the distribution box are affected by the adverse factors such as the long front of the construction site, the narrow site, the tight construction period, heavy tasks, complex geological conditions, large power consumption and many intersections. All the cable lines for each shaft are buried or laid along the green space and enclosure. When crossing the road and the Fourth Ring Road Bridge, special protective measures are taken to erect or bury them and erect them at the specified height to ensure the traffic safety of vehicles and personnel. A general control distribution box, power distribution box and lighting distribution box are set at each shaft. The power distribution box depends on the number of power equipment for construction. All electric equipment shall adopt three-level leakage protection. The leakage action current shall not be greater than 30 Ma, and the leakage action time shall not be greater than 0.1 s. The underground construction leakage protection shall not be less than three levels. According to the actual power consumption of the project, a group of repeated grounding shall be made at each general distribution box, and its resistance value shall not be greater than 10 Ω. To ensure the construction power requirements. V Load calculation main electrical equipment list serial number electrical equipment name, model and nameplate technology 1 some manufacturers are greedy for a few and cheap purchases of such instruments data sets power (kw) total power (kw) 1 mixer jzc-250 380V 2 5.5 11 2 sprayer pz-5380v 4 5.5 22 3 electric hoist DDT 380V 4 7.5+0.8 33.2 4 grouting machine ub3380v 2 48 5 electric welding machine BX 380V 8 21168 6 low voltage transformer 220 ∽ 380V 4 5207 site lighting 220V 12112 although two shafts are constructed, the power consumption of each shaft is basically the same. The total power consumption of the two shafts along the whole line can be known only by calculating the power consumption of one construction shaft. Take 18# as an example: 1

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