railway tunnel

Based on the application status of rock-drilling jumbo， in order to solve the problem of large average linear overbreak amount when drilling and blasting with rock-drilling jumbo， the section of grade Ⅲ surrounding rock (DK23 +075—DK23 + 155) at the left tunnel entrance of Taixingshan tunnel

A parallel pilot tunnel with a section size of 6.5m × 6.5m in a railway tunnel is taken as an example． In view of the practical engineering problems such as the inability of the three-arm rock drill to realize the inclined cut and the long ventilation time after blasting due to the limitation of

The double bend arm drilling rig WD200E has the characteristics of simple operation, powerful function and smooth running, which is suitable for the construction of various working conditions. Based on the construction example of tunnel project, the paper discusses the structure composition and

In order to study the application of intelligent construction technology in China's railway tunnels, relying on the projects such as Sujiayan Tunnel and Xiangjiawan Tunnel of Zhengzhou-Wanzhou Railway, and Guzhang Tunnel and Jishou Tunnel of Zhangjiajie-Jishou-Huaihua Railway, the application

In order to apply mechanized drilling and blasting method for large-section tunnel construction in weak surrounding rocks， construction technologies of rock drilling and arch installation were studied based on Laifu tunnel of Chongqing-Kunming high speed railway. Through the renovation of the

At present, the quota for mechanized supporting construction of railway tunnels is under refinement while corporate construction technology management and cost control are under exploration. In the paper, with the example of excavation, concrete spraying and other sub-measurement of mechanized

The investment impact of large－scale Mechanized Matching in Construction of Railway Tunnels with drilling and blasting method is analyzed in this paper． Taking a newly built railway tunnel project as an example，the economy and construction schedule of Ⅰ，Ⅱ and Conventional mechanized Matching schemes

Rock strength and surrounding rock integrity were the main parameters of tunnel surrounding rock classification. Aiming at the problem that the traditional acquisition methods of rock strength and surrounding rock integrity were not advanced and timeliness，a classification method of

The further analysis on the advantages and disadvantages and the applicability of pneumatic drill and rockdrilling jumbo for high-speed railway tunnel is of great significance. The application of pneumatic drill in drilling and blasting and restrictive factors of drilling and blasting of rock

In view of such shortcomings as low efficiency and poor quality etc of traditional manual drilling by pneumatic drilling，this paper studied the applicability of drilling jumbo in the tunnel construction with full section method and step method through theoretical analysis，gave the applicability

In recent years,more and more high speed railway tunnels have been built in China. However,these high speed railway tunnels are basically constructed by drill and blast method assisted by hand held pneumatic drills and multi purpose operation platforms.Such equipment allocation mode has the