Abstract
The construction of prefabricated concrete structures involves many different types of precast concrete (PC) components. Improper arrangements of the transportation, storage, and hoisting of the PC components could lead to unnecessary relocation of PC components, causing a delay in construction progress. To address this problem, this paper presented a dynamic optimization method for PC component transportation and storage based on real-time scheduling and tracking. The real-time schedule can be extracted from a 4D building information model (BIM), and the position of PC components during the whole transportation process is tracked by a proposed tracking system which integrates the global navigation satellite system (GNSS) and the radio frequency identification (RFID) technology. A transportation optimization model was built to obtain a reasonable transportation plan based on real-time construction progress. A cyclic operation network (CYCLONE) simulation model for component storing and hoisting was proposed to calculate the on-site transportation time. A storage optimization model was proposed by considering the real-time transportation information to optimize the storage mode and storage position in the yard. The proposed models were solved in the context of a case study, which indicates that our method can reduce the on-site transportation time by 37% and effectively control the relocation times.
Highlights
Prefabricated concrete structure is recently gaining momentum in the architecture, engineering, and construction (AEC) industry
(1) Results of the genetic algorism (GA)-Simulated Solution. e maximum weight of the precast concrete (PC) components in this project was 1.7 t, and the nominal speed of the tower crane was constant when the hoisted components are less than 3 t. erefore, the transportation difficulty coefficient wi of each component is 1
Given the uncertainty of the construction schedule and transportation condition, this study developed the real-time optimization models for the transportation plan and storage layout of PC components based on real-time scheduling and material position tracking
Summary
Prefabricated concrete structure is recently gaining momentum in the architecture, engineering, and construction (AEC) industry. With this technique, a building product is constructed and delivered by assembling concrete components that have been precast in factories. The construction of prefabricated concrete structures is a relatively complex process that involves a series of operations such as component transportation, storage, hoisting, and installation. E transportation plan of PC components determines whether there would be sufficient components and space on-site, respectively, for construction and for storage [3]. Not being able to scientifically arrange the transportation plan and storage layout will result in problems such as storing difficulties and relocation, leading to undesirable delays in the construction schedule [4, 5]
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