Hangzhou Metro Line 8 | Full-Face Excavation
Abrasive sand layers + strongly weathered granite
No cutter breakage or abnormal exposure after optimization
One-time breakthrough, high project recognition
Category:
Shield / TBM Disc Cutter Application Cases
Customized Full-Cutterhead Solution for Highly Abrasive Composite Formations
Geological Background
The formation consists of the following high-abrasion layers:
- Sand layer
- Silty clay layer
- Fully weathered granite
- Strongly weathered granite
- Moderately weathered sandstone
Original cutters showed severe wear after 300 m, with extensive carbide exposure, seriously affecting tunneling efficiency.
Challenges Faced
- Typical high-abrasion composite ground, extremely fast tool wear
- Clear service-life bottleneck with original cutters
- Frequent interruptions to tunneling progress, affecting construction scheduling
Xinda Solution
After on-site investigation, Xinda engineering team implemented:
- Full cutterhead redesign
- Upgraded cutter ring material with improved wear and impact resistance
- Project-specific cutter design optimized for weathered granite–sandstone composite strata
Performance Results
- Entire cutterhead completed 2.8 km tunneling in a single pass (no cutter replacement)
- Uniform wear across cutters
- No abnormal failures such as cutter breakage or material spalling
- Highly recognized by the project owner and adopted as the standard solution for subsequent sections
Comparison image explanation
Targeted Tool Design by Xinda
Severe Wear of Original Tools (Two Sets)
Previous page
Next page
Related products
Contact Us
Address : No. 1403 and No. 1405, Xianyue Huan Road, Tianyuan District, Zhuzhou City, Hunan Province China
Sales Hotline : +86 19083069638
Customer Service Hotline : +86 731 22530680
WhatsApp : +44 7536353814
WhatsApp : +86 18973382314
Email : info@cinda-tec.com
Website : http://www.cinda-tec.com
Powered by www.300.cn ChangSha
Do you need technical support?
We are always here to assist you.
For product selection advice, quotation information, or technical support, please feel free to contact us: