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Chongqing Water Diversion Tunnel | 100 MPa Challenge

Chongqing Water Diversion Tunnel

UCS ≈ 100 MPa, massive hard rock with no visible joints

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Tunneling Cutting Picks – Application Cases

Chongqing Water Diversion Tunnel

The tunnel passes through high-strength rock with no apparent fractures, featuring a uniaxial compressive strength (UCS) of up to 100 MPa and extremely high abrasiveness.

Under the original solution, excavation of 1 meter required dozens of cutting picks, resulting in extremely slow progress.

Customized Solution

Xinda’s technical team deployed the S135 Ultra-Wear-Resistant Cutting Picks specifically developed for hard and highly abrasive rock formations.

Equipped with premium φ35mm carbide tips
Incorporates patented materials and brazing technologies
Optimized to achieve an ideal balance between hardness and toughness
Designed for superior resistance to severe abrasive wear

The solution was applied directly on site for comparative testing.

Implementation Results

Wear Reduction:

In “grindstone” rock formations, after continuous excavation of 1.5 meters, only one cutting pick showed wear — a 95% reduction in pick consumption.

Efficiency Improvement:

Excavation efficiency increased by approximately 40%, significantly shortening the overall construction period.