Abstract
The systematic collection and management of on-site information in high-rise building construction are important factors in construction management. Recently, wireless sensor network (WSN) technology has been utilized to manage the various tasks involved in high-rise construction efficiently and in a timely manner. However, because of the repeated installation of sensors and repeaters along with the construction progress, the existing WSN technology is ineffective when applied to the temperature management of concrete in structural work. Here, we propose a new data collection method in which a worker uses a smartphone to repeatedly monitor concrete temperature. In field implementation, the proposed system enables concrete temperature management without a transmission gap for monitoring in 60-min intervals with smartphones provided to 20% of the structural workers. Next, a case study was performed on a high-rise building construction site to analyze the effectiveness of the proposed system in terms of cost savings by avoiding schedule delay. The results of the case study show that the proposed system can reduce the additional work costs resulting from delays in concrete curing and save up to $18,907 in labor costs. In addition, this system can reduce the temperature management time of the quality manager and enable more efficient management. It is also expected that this system will contribute to on-site waste management by reducing the number of embedded sensors.
Highlights
Accurate and timely management of on-site information in high-rise building construction is a crucial element for the success of a project [1]
The results indicate that the S-DCS is optimal for concrete temperature monitoring at the 60-min interval with six smartphones at the site
A new data acquisition system was proposed for concrete temperature monitoring in high-rise construction
Summary
Accurate and timely management of on-site information in high-rise building construction is a crucial element for the success of a project [1]. Existing WSN-based data acquisition methods are not efficient for use in repetitive tasks such as concrete temperature monitoring in high-rise building construction. Repeated installation of hardware on every floor requires additional work cost and time and may negatively affect construction waste management due to the number of embedded sensors required [7] Obstacles such as the steel materials of formwork may lower transfer rates from sensors to routers. Data collection by workers using smartphones can be an efficient solution for repetitive concrete temperature monitoring in high-rise construction. It is expected that the results of this study will enable efficient data collection and monitoring in high-rise frame construction and contribute to preventing construction delay caused by the concrete temperature and securing excellent quality
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