ThaiScience
ThaiScience
ENGINEERING JOURNAL CHIANG MAI UNIVERSITY
Volume 26, No. 02, Month AUGUST, Year 2019, Pages 216 - 230
Improvement for segmental box girder for installation process of mass rapid transit, the green line project (northern zone)
Prapot Rattamanee and Danai Wantanakorn
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The objective of research on construction process improvement in segmental box girder of the Green Line mass rapid transit project (Northern Zone) is to identify obstacles and factors causing inefficient operations. Time and cost of operations from the original working system were initially collected. Based on the obstacles and bottlenecks found, a new working system was developed. Then, the new system was implemented and data related to time and cost were collected in order to compare them with those obtained from the original working system. The results reveal that main factors causing work inefficiency in both time and cost are from sequential work plan, inappropriate working process and installation methods, and traffic restrictions. Taking those negatively influential factors into account, the new system was then created by rearranging working process in association with concurrent steps and critical path. As a result, the new process can reduce operations from 35 steps as in the original process to 34 steps, and critical activities from 32 steps to 27 steps. In comparison of the average time and cost between the two processes, this study shows that the working time and operation cost of the new process can be decreased from those of the original work process approximately 25.76% and 24.43% per span, respectively.
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Published by : Faculty of Engineering Chiang Mai University
Contributions welcome at : http://researchs.eng.cmu.ac.th/?name=journal
