Seeking advice on the specific tasks involved in construction site layout planning

The general construction layout plan is a fundamental component of the construction organization design. Its main elements include: the area designated for temporary construction use, the layout of sites for prefabrication, the location of temporary offices, areas for storing materials, equipment, finished and semi-finished products, spaces for placing construction machinery and tools as well as parking areas for vehicles, arrangements for entry and exit routes, and plans related to drainage, fire safety, environmental hygiene, etc

The general construction layout plan is a fundamental component of the construction organization design. Its main elements include: the area designated for temporary construction use, the layout of sites for prefabrication, the location of temporary offices, areas for storing materials, equipment, finished and semi-finished products, spaces for placing construction machinery and tools as well as parking areas for vehicles, arrangements for entry and exit routes, and plans related to drainage, fire safety, environmental hygiene, etc. It would be beneficial to have a unified planning approach for all construction units, which helps to ensure orderly construction practices.

The main contents of the overall construction plan are as follows: Taking the construction organization design as an example, 7 Overall construction layout: 7.1 General layout planning (a general layout diagram should be provided); 7.1.1 Temporary living facilities – if they are to be set up on-site, a detailed layout plan is required, while only a brief description is sufficient if they are located off-site. 7.1.2 Temporary construction facilities a) The layout of temporary construction facilities is primarily determined based on the general layout plan of the project or facility, taking into account the locations for the main power supply, sub-switch boxes, prefabrication areas, areas for storing equipment and materials, access roads for vehicles, construction machinery, lifting locations, the arrangement of water and air pipes, fire protection measures, as well as emergency facilities. And include detailed text: For example, b) A temporary construction facility 90m long from north to south and 70m wide from east to west is planned on the north side of the office area. The north and west sides are adjacent to the factory perimeter wall, the south side is near the office area, and the east side is planned to be enclosed with colored steel plates. c) The construction temporary facilities are divided into a prefabrication area, a material area, and a finished products area; the finished products area can accommodate rest shelters and tool sheds for specialized companies. d) To the south of the prefabrication area is the electrical and instrumentation prefabrication zone, while to the north is the pipeline prefabrication zone; within these zones, tubular prefabrication platforms are constructed using steel pipes and platform slabs. e) Construct driving roads in the prefabrication area and finished product area within the construction temporary facilities; the bottom layer shall be paved with 300 mm thick flagstone, the top layer with 200 mm thick crushed stone, and the remaining areas with 100 mm thick crushed stone. In the prefabrication area, tubular prefabricated platforms are laid using steel pipes and platform slabs. 7.1.3 Temporary office facilities a) A office area measuring 42 meters in length and 25 meters in width has been designated on the site, to the north of the Yangzi Engineering Company’s acetic acid project team in Nanjing. The offices utilize the existing containers from the Nanjing branch, arranged in two floors; single containers are located on the east and west sides, while double-container units are placed side by side on the south side. b) The east and west sides as well as the south side of the office area are enclosed using containers, while the north side is surrounded by colored steel plates, with a spacious open gate left for 5 meters to facilitate vehicle access ； A simple guard room is located on the east side of the main gate. The bottom layer of the yard is paved with 100 mm thick crushed stone, while the top layer is covered with 50 mm thick macadam to facilitate vehicle traffic. c) The on-site office facilities will make use of the existing ones at the Nanjing branch, with no need for new purchases. 7.2 Design for water and electricity usage during construction 7.2.1 Electricity usage during construction 7.2.1 Temporary electricity supply a) Principles: The temporary electricity needed for the construction of the core facilities of the acetic acid project shall be provided through negotiations by the general contractor. It provides power for construction work, on-site offices, on-site prefabrication plants, and supply warehouses. The electrical supply for lighting and equipment is installed by means of exposed overhead wiring or buried wiring. The electrical wiring is installed in a manner that takes into account the site conditions and the owner’s requirements, ensuring safe and reliable power supply while meeting the needs for construction electricity. b) Main facilities: 5 distribution boxes, 6 switch boxes. Armored cables: VV22—1kV—3×120+2×70mm2, 200m; VV22—1kV—3×95+2×50mm2, 500m; VV22—1kV—3×70+2×35mm2, 800m. Multicore rubber flexible cables: 2000m. Yellow-green grounding wires: 16mm2, 100m. c) Layout requirements: When laying cables underground, the burial depth must comply with relevant regulations; the soil should be compacted in layers after fixing the cables, and tie rods should be installed at the beginning and end of the cable runs as well as at corners ； When cables need to be laid through passages or along trenches, sleeves should be installed for protection ； --The layout of the exposed wiring is reasonable, with evenly distributed fixing points ； --The distribution boxes and switch boxes are made of iron plates, while the distribution panels are made of iron plates or bakelite. The incoming and outgoing wires of the switch box should pass through the pre-arranged holes ； --The enclosure should have protective earth connection, as well as a door and lock ； --The construction power supply system uses a three-phase five-wire system, and the protective neutral wire should be provided separately ； d) Temporary power capacity: Based on the progress of the project, the labor allocation, and the plan for bringing construction equipment into the site, the capacity required during peak power usage for this project is as follows: P_transformer = K4 × P_calculated. Here, P_calculated represents the calculated power consumption, while P_transformer is the calculated capacity of the transformer. K1 is the load factor for motor-type loads, and it is generally set at 0.7 ； K2 is the load factor for welding machines and heat treatment equipment, and is generally set at 0.6 ； K3 is the load factor for office and lighting purposes, and is generally set at 0.5 ； K4 is the utilization factor of the transformer, typically taken as 0.9. Based on peak usage periods and taking into account staggered operating times for the equipment, the details of the electrical equipment are as follows: Serial No., Name, Quantity, Power per Unit: 1. Electric air compressors – 2 units, 15 KW/unit each; 2. Inverter-based arc welders – 70 units, 14 KW/unit each; 3. Welding rod drying ovens and constant temperature chambers – 3 units in total, 10 KW/unit each; 4. Rollers – 1 unit, 5 KW/unit; 5. Other small-scale prefabrication and processing motor tools – 24 units, totaling 40 KW; 6. On-site lighting, office lighting, and air conditioning – 30 KW in total. The calculated power value is P_calculated = 1.10 (K1ΣP1 + K2ΣP2 + K3ΣP3). Calculating this gives P_calculated = 1.1 (0.7×55 + 0.6×980 + 0.5×70) = 662 kVA. The power transformation factor is K4, so P_calculated = 652×0.9 = 595.8 kVA. Therefore, a 600 kVA transformer should be used for power supply during on-site construction. 7.2.2 Water for construction a) Total water consumption for construction The main sources of water consumption in this project are related to pressure testing of static equipment and flushing during pipeline testing. Based on estimates of the workload, the amount of water required for pressure testing of static equipment is approximately 1800 m3, while the amount of water needed for pipeline testing and flushing is about 1600 m3. Therefore, without taking into account water needs for fire fighting, the total water consumption at the site can be estimated as follows: Q=2×(1800+1600)=6800 m3 b) Water consumption during peak construction periods According to the regulations set forth by our company, the water supply for safety and fire fighting purposes at the site is determined based on the area of the construction site. When the area of the construction site is less than 250,000 m2, the minimum designed water supply capacity is 10 L/S. If the water demand for construction purposes is less than that required for fire fighting, the water consumption during peak periods is calculated based on the fire fighting requirements. During the peak water usage period of this facility, namely during the pipeline testing and flushing processes, assuming 2 km of pipe is treated per day, the estimated water consumption for construction purposes is as follows: Q=1.1×2000×35×2/(8×3600)=5.347 L/S, which is less than the required 10 L/S for fire fighting purposes. Therefore, the daily water consumption during peak hours is estimated based on fire-fighting water needs as follows: (calculated over 8 hours per day) Q_peak = 8 × 3600 × 10 = 288,000 L = 288 m3. c) Selection of temporary water pipes: Considering the water demand during peak hours, the on-site water flow rate is taken as Q = 10 (L/s); thus, Q_total = 1.1 × Q = 1.1 × 10 = 11 (L/s). The diameter D is approximately equal to 29√Q_total = 29 × 3.32 = 96.2 (mm). Hence, a 20# seamless steel pipe with dimensions φ108×4 should be used for the main temporary water pipe

I need help understanding what requirements and principles apply to the arrangement of construction equipment for an 800,000-ton ethylene project