代写CEN 421 Construction Process Simulation帮做R语言

Department of Civil Engineering

Construction Process Simulation (CEN 421)

Coursework 1 Report

Coursework Description:

Develop a simulation model for the case study, which is the excavation project of a commercial building located in Suzhou, China. The excavation task was divided into 3 layers due to the depth requirements of the building’s  first, second and third floor basement  levels, which were 4.55 m, 3.8 m and  4.1  m respectively. When the case study was carried out, the excavation was on the third floor; therefore, the simulation model should be built for that floor only. The plane layout of the third floor is shown in Figure 1(a), where two roads and a long slope were established for trucks travelling down to the third floor and leaving the site; as a result of the road width, the number of trucks that could enter the site simultaneously was restricted to two. Furthermore, the zone division for the third floor was set to 6, as shown in Figure 1(b).

Figure 1. Third floor excavation: (a) Truck driving route; (b) Zone division

Onsite Data

Data were collected for the whole excavation activity, as shown in Table 1. The soil type was clay, and a dilation factor of 1.15 was applied to calculate the volume. Usually two, but sometimes three, working groups were observed on the site. Each group included one truck associated with two excavators loading the truck simultaneously. A total  of 10 trucks (with a capacity of 20 m3) and 6 excavators  (with a productivity rate of 100~150 m3/hour, and a bucket capacity of 1 m3) were arranged to carry out the work. The dump site was 25 km away from the construction site with trucks travelling at about 60 km/h. The running cost of machinery was assumed to be 200¥/day for excavators and 300¥/day for trucks based on the local average. The total volume of soil transported was 92429 m3.

Table 1. Data collected on site

Information Form. for construction site-1st
General Information (for floor 3)
Date	2/11/2017	Temperature	22℃	Humidity	Change with Time
Daily Work Time		8a.m~11a.m/ 12a.m~10p.m (generally 12 hours/day)			Soil Type	Clay
How to get Vtot		CAD(row)	Floor H	5.9 m	Dilation Co	1.15 (row)
Total Volume of Floor 3		92429 m3
BOQ for Excavation
For individual team	Excavator	3~4	Labor	4	Trucks	Around 10
	No. of Team	2~3	Team Productivity		100 m3/hour
	Remarks	The actual works focus on zones
Appliance	Excavator
1	Company	PC210	Productivity	100~150 m3/hour	Cost	200 ¥/d
	Down Time	/
2 (small)	Company	PC130	Productivity		Cost	200 ¥/d
	Down Time	/
Appliance	Truck
1	Company	Hauling	Productivity	20~25m3	Cost	300 ¥/d
	Down Time	/	Speed at F	60 km/h	Speed at E
2 (small)	Company	Hauling	Productivity	20~22 m3	Cost	300 ¥/d
	Down Time	/	Speed at F	60 km/h	Speed at E
Other Essential Information
Tmin for a truck from site to exit			5~7 min	Remarks	Data were estimated based on the experience of the other two floors
Distance from site to Haul			25 km
Pre T need before Excavation			2~3 days
Normal trucks need per day			~10+
Route of truck			Shown in Pictures
Space control			Shown in Pictures

Modelling requirement:

1)  Develop a CYCLON simulation model in Simphony;

2)  Run the simulation and produce a series of simulation results, including project duration, average cycle time, average utilization for resources, etc.

3)  Space should be considered as a type of resources as well;

Based on the simulation model, figure out the optimized resource combination in terms of cost and duration, and find out:

1)  The optimal number of trucks;

2)  The optimal number of excavator serving one truck;

3)  The optimal space resources, e.g., number of entry and exit.