tunnel

Taking the Chunmushan Tunnel of Zhitong Expressway as the background, the application of full-process mechanized equipment in expressway tunnels is introduced. The application of seven supporting tunnel construction process equipment (full-process mechanized equipment) including a two-arm rock

Based on the construction conditions and engineering characteristics of the Wujialiang super-long tunnel of Chengkai Expressway, this paper studies the mechanized excavation application of three-arm rock drilling rigs in high-risk long tunnels, and compares the cost of manual excavation

The tunnel construction environment is relatively bad and the construction safety risk is high. Mechanized replacement and automatic personnel reduction is the development trend of the times, which can greatly reduce the labor intensity of front⁃line constructors and reduce the possible

Based on the analysis of the application of cantilever TBM and self-propelled inverted arch trestle in Daqing project, this paper discusses the standardized configuration of new-type machinery for highway tunnel construction. The application of the cantilever roadheader and the self-propelled

Excavation costs account for a large proportion of the construction costs of railway tunnels. In order to reduce project costs, it is the general trend to replace manual excavation with three-arm rock drilling rigs. Based on the hydrogeological conditions and construction technology of

With the rapid development of highway transportation industry in recent years, there are more and more long tunnels built in the severe cold areas of North China, but the construction difficulties are also more and more, and the requirements of construction technology are also improved

Mechanization is essential for improving the safety and environmental conditions of tunnel drilling and blasting operations. Currently, China is facing serious problems with regard to tunneling, such as difficulties in recruiting blasting workers, fully utilizing the drilling trolley

In recent years, large-scale highway construction and development has become the main melody of the transportation sector, under this trend, the traditional tunnel construction technology can not meet the national environmental protection, low energy consumption, economy and high safety and quality

In order to effectively reduce the construction cost and the overbreak amount by drilling and blasting method,and improve the drilling and blasting construction technology, the operation mode of the rock-drilling jumbo is studied, and it is concluded that when the rock-drilling jumbo

The three-arm rock drill trolley is an important large machinery and equipment in the tunnel excavation, and its remarkable environmental protection, high eff iciency and safety features make the trolley more and more widely used, especially indispensable in the construction of long tunnels

Taking the construction of Zhangjihuai Railway Guantian Tunnel Project as an example，through theoretical analysis and field test，the following research results are mainly obtained. (1) Through theoretical analysis and field test，the hole，drilling and charging of the three-arm drilling rig

As an advanced intelligent excavation equipment, three-boom hydraulic rock drilling jumbo has been gradually applied in long and huge tunnel construction. It can be combined with the construction characteristics of geological environment. Applying its technical features in construction

This paper gives the definition of the rock drilling jumbo for tunnel and describes China's manufacturers of rock drilling jumbos for tunnel and models of their products. The rock drilling jumbos are divided into 2 classes herein: jumbos with the usage report and jumbos without the usage report.

Through researching the development of rock-drilling technology, data collection and site surveys, a technical and economic analysis of hydraulic drilling equipment and pneumatic rock drilling equipment for tunnel drilling operations was conducted. The results show that hydraulic drilling equipment

The application of 3-boom hydraulic rock drilling jumbos in the construction of passenger-dedicated railway tunnels is presented,analysis is made on the reasons that have impact on the working efficiency of the rock drilling jumbos and some countermeasures are recommended to improve the performance