| Title |
Optimum Construction Duration for Road Tunnel Excavation Works |
| Authors |
Kim, Ha-Na ; Kim, Dae Young ; Kim, Dae-Young ; Jeong, Seong-Chun ; Huh, Young-Ki |
| DOI |
https://doi.org/10.5659/JAIK_SC.2018.34.4.59 |
| Keywords |
Optimum Construction Duration ; Road Tunnel ; Tunnel Excavation ; Rock Mass Rating |
| Abstract |
Construction schedule acceleration due to unreasonable construction planning frequently leads to construction accidents. In order to avoid such inevitable acceleration and to ensure safety in construction sites, there is a need for objective standards to determine appropriate construction duration for each construction process earlier in the process. In order to achieve the goal, intensive experts interviews were firstly conducted to identify candidate drivers affecting construction schedule of road tunnel excavation works. Then, a total of 34 field data was collected from on-going sites to analyze. It was found that actual excavation length per one day on site is varied mostly by Rock Mass Rating(RMR) types from various statistical analyses. Therefore an one-way table of excavation length per a day by RMR types were presented in a form of percentile. The results will help industry experts determine the most appropriate construction schedule for the works, which eventually lead to a zero accident site in many ways. |