In late summer and early autumn, the deep reaches of Mount Tai are lush with vegetation. At the construction site of the Xinghuayu Tunnel on the Jinan-Zaozhou Railway (Tai'an Section), a "steel matrix" of specialized tunnel equipment from China Railway Equipment is working diligently to support the construction of the Xinghuayu Tunnel, Shandong's first fully mechanized tunnel construction model project.
The 7,220-meter-long Xinghuayu Tunnel, a key project along the entire Jinan-Zaozhou Railway, faces complex geological conditions. It traverses hard rock formations composed primarily of gabbro and granite, and also intersects fault fracture zones, posing localized risks of water inrush and rockbursts. The traditional manual drilling and blasting method previously employed was inefficient and presented significant safety risks, becoming a key bottleneck hindering the project's progress.
Three-arm drilling rigs and dual machines operating simultaneously
To address this challenge, China Railway No. 5 Engineering Group, responsible for tunnel construction, introduced a complete set of hard rock tunnel construction equipment from China Railway Equipment. This includes core equipment such as an intelligent three-arm drilling rig (with an integrated remote control system), an arch installation rig, and an integrated anchor-grouting machine. This creates a fully mechanized production line covering excavation, support, and lining. The drilling rig's remote control system, via a dedicated network, enables "what you see is what you control," providing solid technical support for precise operations in complex geological conditions.
To ensure efficient equipment operation, China Railway Equipment dispatched an experienced operation and maintenance team to provide on-site guidance. Furthermore, they provided systematic training to project technicians to enhance their equipment operation, maintenance, and fault analysis skills. Based on this, the team dynamically optimized drilling parameters and construction techniques based on surrounding rock changes, improving both the smooth blasting effect and cycle time, significantly promoting efficient tunnel construction.
