A. Construction preparation
Section 1 Site Leveling and Road Construction
The construction site has been basically leveled, and simple construction roads can reach the construction site.
Construction water and site drainage in the second quarter
Construction water: According to the construction water conditions provided by the construction unit, the construction water can be connected to the site to meet the construction requirements. See the general layout of construction for water pipes.
In order to ensure that the whole site of this project has enough water, the water consumption of this project is calculated according to the structural characteristics and construction period requirements of this project, combined with construction machinery, etc.
The water consumption plan for concrete mixing and curing is Ni= 100m3 per shift, and the water consumption per cubic meter of concrete is Q 1=400L/m3. If the construction water consumption coefficient K 1 unexpected 1. 10, and the water consumption imbalance coefficient K2 is 1.5, the concrete shall be stirred and maintained.
Q1= (k1* q1* n * k2)/8× 3600 = (1.10 * 400 *100 */kloc-)
Domestic water on site
Q2= water imbalance coefficient * (peak number * water quota)/(days per shift *8*3600)
=(300*50* 1.4)/(2*8*3600)
= 0.37 l/s
Fire water
Q3= 10L/S is based on a fire with an area of 8000m2.
The water flow of this project is:
Q = q1+(Q2+Q3)/2 =10+(0.37+2.3)/2 =11.34 (liter/second).
Selection of water supply pipe diameter
The supervisor adopts DN=70mm galvanized steel pipe (when the flow rate is 10.0L/S, the pressure loss is 0. 17 1m/km), and each floor is provided with a DN50 indoor fire hydrant and a SN20 valve.
Construction site drainage:
Before on-site construction, drainage ditches should be set around buildings and in places where construction water is concentrated. All drainage ditches should be collected centrally, and grit chambers should be prepared. Then, the construction water is discharged into the grit chamber, and then discharged into the sewage main pipe designated by the construction unit after precipitation and filtration.
The first section construction electricity and facilities layout
Construction electricity is set according to the principle of "three-phase five-wire system" in JGJ46-88. In order to ensure the quality of construction electricity consumption, improve the safety of construction power supply and avoid the occurrence of construction electricity accidents, combined with the characteristics and requirements of construction site power supply, the temporary electricity consumption on site is calculated and the line layout is carried out.
Construction electricity consumption
According to the mechanical equipment used in the construction site, the total electricity consumption is calculated, and the electricity consumption for construction lighting is calculated as 10% of the electricity consumption.
S= 1. 1×KC∑P machine/η cos θ =1.1× 0.6× 362.4/0.86× 0.9 = 309.02 (kva).
Where s refers to the total capacity of construction electricity (KVA)
∑P machine-sum of capacity of each motor (KW)
η-the average efficiency of each motor is 0.86 KC- the demand factor is 0.6 COS- the average power factor of each motor is 0.9.
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