The earthwork volume must be calculated as accurately as possible for economical construction and cost savings. In particular, when calculating the areas and volumes of irregular curved terrains such as mountains, reservoirs, lakes, and coasts, the vertical assumptions for the boundary equation must be rationally and systematically established. This study focuses on earthwork volume calculation technology using UAV (unmanned aerial vehicle). UAV can be used for various types of work, including checking the progress of construction at construction sites and calculating the earthwork volume for large areas. However, earthwork volume calculation technology using UAV is inefficient in terms of information production, management, and reuse because the quantitative guidelines for UAV operations are insufficient, and the output quality, analysis method, and analysis results differ. To solve these problems, the authors investigated an earthwork volume calculation method for construction sites that use UAV to automate the on-site calculation of construction errors and support an on-site monitoring system using building information modeling (BIM). To calculate the earthwork volume of the target site, a chain method with a planned plane map based on the average end-area method was used as a representative earthwork volume calculation method. The digital surface model method was applied to review the optimization of the earthwork volume calculation using UAV. This study is a process of analyzing construction data, and aims to strengthen the linkage of 3D data and provide construction management information specialized in excavation work. Through this earthwork analysis using UAV, it is possible to intuitively review the progress of earthwork in 3D by linking the current site with the planned plane.

This study began with the increasing importance of ESG through sustainable management evaluation across all industries, predicting market demand through the ESG management paradigm and financial environment changes in the global industry, and establishing international strategies for the construction industry. Compared to other industries, the construction industry is in the early stages of ESG formation, and it is unclear how to expand its base by establishing evaluation system standards such as innovation of individual services, interaction of social capital, and definition of stakeholders. Currently, some large construction companies in the construction industry are publishing sustainability management reports at the group level, but given the recently strengthened global sustainability of ESG by GRI Standards, efficient analysis of global construction markets and strategic orders are needed. Therefore, this study focuses on assessing the sustainability strategies and directions of the construction industry from an ESG perspective. To this end, sustainability issues and insights, as well as global issues in Korea and the worldwide construction sector, were analyzed. The analysis showed that global construction companies were highly interested in business management approaches, such as safety and health, as critical issues regarding the construction industry’s sustainability strategy. In contrast, South Korean construction companies prioritize business values such as value creation, fair trade, and win-win. Both global and South Korean construction companies have been working on greenhouse gas reduction and energy sustainability. Regarding other issues, cultivating construction specialists, enhancing the job training system, and limiting serious accidents and safety mishaps were all significant from a social standpoint among South Korean construction companies. Conversely, global construction companies appeared to focus on issues related to ethical and environmental management from an organizational standpoint.

Air pollution caused by the construction industry in the form of particulate matter (PM) has increased to an alarming level. The effects on the health of construction workers are found to be hazardous despite the current advancement in construction methods and practices. In particular, the efficiency of existing control measures for reducing PM from various construction activities has not been improved to the desired level. This study investigated the factors that influence the efficiency of a sprinkler system-based control measure when water spraying and dust suppressant solutions are used. The real-time PM exposure was measured during hollow-block cutting activity using Alphanese OPC-N3 sensors in dust chamber. The dust suppressant suppresses dust particles by initially forming a solidified film on the particle surface, and the high cohesion of this film enhances the suppression rate by promoting dust particle coagulation. It was observed that when using a dust suppressant, the PM concentration at 100 bar exceeded concentrations at other pressures, resulting in increased efficacy in reducing PM₁₀. Additionally, water spraying at 115 bar was determined to be the optimal control measure for achieving a significant percentage of PM reduction in a shorter period. These findings can be highly beneficial if the water sprinkler system can be modified into a smart mobility-based sprinkler system either ground-based or drone-based at construction sites in improving PM reduction efficiency particularly on high PM emitting activities.