摘要(英) |
Traditionally, in the construction industry, the deployment of truck fleets for the removal of tunnel spoil relies mainly on the rule of thumb to decide on the appropriate vehicle dispatching procedures. If the tunnel work faces increases or the vehicle dispatching becomes more complex, the appropriateness of the vehicle and machinery dispatching choices made by the decision-makers becomes a key point for contractors. Inappropriate deployment can cause schedule delays and increased costs. This study seeks to establish a mathematical optimization model using an integral programming framework in order to assist construction managers in integrating the existing dump trucks, excavators to create a unified assignment program to reduce transportation costs.
There are several basic datasets that need to be tabulated by EXCEL software in the linear optimization process, such as earthwork piling capacity limitation areas, the loading rate of dump trucks, rate of excavation and the rate of beach nourishment unit. Known input data are tabulated and the problem solved with the LINGO 12.0 software package to obtain the best solution to minimize cost and vehicles dispatched. In order to verify the applicability of this model, data for the Caopu tunnel on the South-Link Highway are used as a testing example. Comparison of the test results from the model with the result obtained based on experience reveals that the model presents quite satisfactory results. In summary, the model can be flexibly used to meet the integral planning requirements of tunnel spoil transport operations, so as to serve as an important reference able to assist the construction manager to make decisions about vehicle dispatching. |
參考文獻 |
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