Product Description

This arc-shaped segment bolt is professionally engineered for tunnel arc shield assembly works. Manufactured from premium sturdy steel and finished with hot-dip galvanizing plus Dacromet composite anti-corrosion coating, it owns outstanding rust-proof capability and solid mechanical strength. Its exclusive curved shape perfectly fits the assembly radian of tunnel segments. Matched with complete nuts and washers for quick on-site mounting, it can steadily transfer shear force and tensile force, guaranteeing tight and firm splicing between tunnel segments. It serves as a trustworthy structural fastening choice widely used in tunnels, underground pipe galleries and other municipal infrastructure projects.

Product Overview

This hot-dip galvanized hex head subway segment bolt is a dedicated fastener for tunnel and subway shield engineering. Adopting high-grade steel raw materials and dual composite surface treatment, it gains strong resistance against underground damp and corrosive substances as well as excellent load-bearing capacity. The accurate curved design fits tunnel segment connection perfectly, and full set of matching accessories greatly facilitates field construction. It has become an essential core connecting part for subway, tunnel and underground comprehensive pipe gallery construction.

Core Advantages

• Powerful Composite Anti-corrosion Performance: Combined hot-dip galvanizing and Dacromet double-layer coating can effectively isolate dampness, groundwater and corrosive substances, greatly prolonging service life and perfectly adapting to highly corrosive underground working environments.
• Excellent Bearing Strength: Multiple material options including carbon steel, alloy steel and stainless steel are available. Processed by cold forging, hot forging and precision machining, the finished bolts are solid enough to bear heavy loads without deformation.
• Ergonomic Curved Structure: Scientific arc design effectively disperses concentrated stress, improves fitting precision between components and further upgrades overall engineering structural stability and sealing property.
• Simple & Efficient Installation: Equipped with standard matched nuts and washers, it simplifies construction steps and effectively cuts down on-site installation difficulty.
• Wide Application Scope: Applicable to subway transit projects, tunnel shield construction, underground pipe gallery erection and other municipal works, capable of satisfying diverse customized project requirements.

Product Parameters Table

Application Scenarios

• Tunnel Engineering: Used for splicing and fixing tunnel segments, ensuring overall structural stability and waterproof sealing effect against underground water seepage.
• Subway & Rail Transit: Applied to fix track facilities and shield structures, matching curved construction layout to ensure long-term safe operation.
• Underground Pipe Gallery: Ideal for pipe supporting and internal structural connection, adapting to dark and humid underground surroundings to extend service life of facilities.
• General Municipal Construction: Suitable for curved structure connection of bridges, culverts and other municipal projects, providing targeted customized fastening solutions.

Quality Assurance & Customization Service

We carry out strict whole-process production supervision. Every finished product will go through strict tests on dimension accuracy, coating thickness and mechanical properties to meet unified industry standards. Meanwhile, we provide flexible OEM customization service, enabling customers to adjust product sizes, select different materials and change surface treatments according to actual construction demands.

Logistics & After-Sales Support

• Flexible Logistics Arrangement: Support sea, air and land multiple shipping ways. The delivery period is 3 to 15 working days, which can be properly adjusted according to total order quantity.
• Thoughtful After-sales Service: We offer free online installation guidance and professional technical consultation. Qualified defective goods are supported with return and exchange service under relevant regulations.

Select our reliable arc segment bolts to obtain stable, durable and cost-effective fastening solutions, accelerating project progress and lowering later maintenance expenses effectively.

CTA

Stable quality tunnel segment bolts in various styles. Welcome to contact us for detailed quotation!