Support system analysis in building diversion tunnel ST1-ST4 of Leuwikeris dam construction at West Java Province

International Conference on Earth Science, Mineral, and Energy

地球科学;矿业工程;能源学

Prakoso, R.H.^1 ; Rachman, S.^1

Geological Engineering, FTKE, Trisakti University, Indonesia^1

关键词: Analytical method;    Bench excavation;    Construction activities;    Dam construction;    Drill and blast method;    Excavation methods;    Rock mass classification;    Tunnel stability;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/212/1/012036/pdf
DOI  :  10.1088/1755-1315/212/1/012036

来源: IOP

【 摘 要 】

Construction activities in diversion tunnel of dam need to considere the stability of the tunnel which is very important factor for its continuity. In order to become a safe mining method, it is necessary to analyze the tunnel stability and excavation method using drill and blast method. This analysis is based on empirical method, which is approach using rock mass classification and analytical method based on stresses and deformation of rocks. Based on the analysis, there are three types of rocks passed by the diversion tunnel, i.e breccia, sandstone and claystone, with RMR value ranged from 36 to 51, poor rock class to fair rock class, 2,5 - 3 meters span, top heading bench excavation method, rockbolt, and shotcrete support system with thickness between 256 to 334 mm and steel support.