Research On The Rapid Construction Techniques Of Computer-controlled Drill Jumbo

Rock tunnel construction methods are drill-blasting method and TBM, our country mainly uses the method of drill-blasting method. Drilling blasting is one of the core processes in Drill-blasting method, now we commonly use pneumatic rock drill with homemade bench excavation and computer-controlled jumbo as drilling machines.Currently domestic drill-blasting method for construction mainly are pneumatic rock drill with homemade mainly bench excavation. Using this method, the construction costs are lower, but labor intensity and work conditions are poorer with less efficient constructions; drill-blasting method by the computer-controlled jumbo bores faster and has a higher degree of automation with safety and higher quality construction. Tunnel excavation works in a better working environment .But computer-controlled drill jumbo is high cost.Basing on Dushan tunnel of Qiangui track research item of computer-controlled jumbo, we found that by optimizing drill-blasting method of computer-controlled drill jumbo, the construction process of each cycle had reduced the working hours, improved the speed, and thus achieved lower construction cost. This paper reviews the research status of computer-controlled drill jumbo rapid construction and computer-controlled drill jumbo development at home and abroad. Then it analyzes the operating process of computer-controlled drill jumbo and the key factor to choose the computer-controlled drill jumbo models.The paper bases on the principle of tunneling design, and then analyzes the key tunneling lines and key processes by using the double-coded network. It optimizes the key processes of tunnel excavation, focusing on several major steps of the tunnel excavation: the drilling and blasting ,mucking transport ,bolt-spray support and other complementary support measures to ensure rapid construction. It optimizes three construction technologies which against the computer-controlled drill jumbo: the full face rapid construction techniques, the technology of micro-bench method to control blasting and the construction technology of boring method by computer-controlled drill jumbo combining with the TBM. From the construction period and excavation costs, the paper compare speed and costs of drill-blasting method by the computer-controlled drill jumbo, drill-blasting method by the Pneumatic rock drill and TBM.This article holds that the drill-blasting method by the computer-controlled drill jumbo is an advanced tunneling method, the method can adapt to various geological conditions, particularly in the mid-long or long tunnel construction. Because the drill-blasting method by the computer-controlled drill jumbo have faster driving and lower Construction costs, it have bright prospects for development in the tunnel construction...