Modelling the set of earthworks machinery with the use of computer simulation
Wojciech Rogala , Hubert Jerzy Anysz
AbstractNowadays, completing the ordered construction works within the time assumed is a must for a responsible contractor. The future orders strongly depend on the opinion about a given contractor, especially about their responsibility. Completing the ordered construction works on time is one of the ways to earn the clients’ good reputation. Once the general schedule is agreed between a client and a contractor, it is necessary to prepare the detailed plan of every work execution – the technology design. It allows to assign required resources to every construction activity, thus providing further smooth operation and keeping-up with the schedule. Usually the assignment of the resources is based on deterministic values of the machinery and labor efficiency. During the phase of the work execution it occurs that – when even unnoticeable disturbances are noted – the real duration of a given scope of work is longer than planned. It leads to the conclusion that the average efficiency of the means of production is not a sufficient base for the technology design. The case, where five types of machines execute five types of activities leading to the creation of the compacted sand layer (as a part of the road structure) is analyzed in two ways: deterministic and stochastic one. For the assumed scope of work and the assumed time of the work execution, the set of machines was assigned with the use of the traditional deterministic method. Therefore, assuming that the time of the single cycle of the machine is not stable, simulations were proceeded for modelling real circumstances of the earthworks. As it was expected, the total time of making the complete sand layer was longer than calculated on the deterministic data. The necessity of not exceeding the planned time was the reason for working out the solution. The correctness of the solution found was proved on the statistic bases. The choice of the optimal set of construction machinery is important for the cost of the work execution and for the level of environmental pollution too.
|Journal series||Przegląd Naukowy Inżynieria i Kształtowanie Środowiska [Scientific Review Engineering and Environmental Sciences], ISSN 1732-9353, (B 10 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||building works modelling, earthworks effectiveness, technology design, stochastic processes, computerized simulation|
|ASJC Classification||; ; ; ;|
|Score||= 10.0, 09-05-2019, ArticleFromJournal|
|Publication indicators||= 0; : 2016 = 0.344|
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