The construction of an extra-long and large cross-section highway tunnel is the key for entire construction period in expressway. To ensure construction quality and improve construction progress, the principles for supporting large-scale mechanized equipment, such as matching with geological

The 20CrNi3 shank adapter for hydraulic rock drill was fractured after drilling for 300 meters．The fracture causes of 20CrNi3 shank adapter were analyzed through chemical composition analysis，fracture morphology and microstructure observation，mechanical properties testing． The results showed

Brand : EPIROC
Part No. : 0667319400
Description : Cup Seal
Use in : Cop 1238 , Cop 1440

In view of the characteristics of two-way eight-lane and single-hole four-lane large-section tunnel construction of expressway, the application of large-scale mechanized full-process operation technology is studied. Through the use of advanced geological prediction technology, the condition of the

In order to further improve the level of large-scale mechanized construction of plateau railway tunnels, reduce construction risks, and ensure the construction progress, combined with the characteristics and construction requirements of the surrounding rock of plateau tunnels, the application

In recent years, bolt (anchor cable) support has been widely used in anchor protection of subgrade slopes and underground engineering. In the past, the construction of bolts (anchor cables) generally used hand-held down-the-hole drills (air leg rock drills) to form holes. Hand-held down-the-hole

In the process of vigorously promoting the "Belt and Road" policy in my country, more and more engineering contracting companies have responded to the call of "going global" and participated in the competition in the international market. It has become a new normal for construction companies to

Brand : EPIROC
Part No. : 3115917090
Description : Oring Set
Use in : Cop 1638hd+ , Cop 1838+ , Cop 1838hd+ , Cop 1838he+ , Cop 1838mux+ , Cop 1840+ , Cop 2238hd+ , Cop 2550+ , Cop 2560+ , Cop Sc25

Taking a single-track tunnel of a plateau railway as the research background, the full-section with invert one-time excavation technology was studied in the weak surrounding rock section, which saved resources and avoided many problems caused by the secondary blasting of the traditional invert. The

Based on the Jinyun Mountain Tunnel project of the Chongqing-Kunming high speed railway Chongqing-Yibin section， this paper explored the key technologies and equipment for mechanized construction. The results show that the improved three arm rock drilling trolley can adapt to the conversion of