Suez Canal Economic Zone Northern Construction Area

China Railway Tunnel No. 3 Group Co., Ltd.
Shantou, Guangdong
Subsea Tunnel Project
Fiberglass Hollow Grouting Anchor

Project Background

The Su'e Channel is a key cross-sea link connecting the north and south banks of Shantou. The northern section features an underwater tunnel with complex geological conditions dominated by weak, fractured rock. Due to its significant burial depth and high seawater pressure, the support system must meet extremely stringent requirements for corrosion resistance and long-term stability.

Technical Challenges

  • 1The harsh corrosive conditions of the marine environment render traditional steel rock bolts inadequate in durability.
  • 2The surrounding rock is fractured and requires immediate support from rock bolts.
  • 3Deep tunnel burial and high water pressure demand strict anchor pull-out resistance.
  • 4The construction environment is damp; the material must have excellent workability.

Solution

For the unique conditions of underwater tunnels, our project utilizes our glass fiber hollow grouting anchor rod system. Constructed from high-strength glass fiber composite, this anchor rod offers exceptional corrosion resistance with a designed service life exceeding 100 years. Its hollow design enables integrated grouting: after installation, grout is pumped directly through the hollow body into the borehole, ensuring solid anchorage.

Technical Specifications

  • Anchor bar specification: φ32mm/φ36mm
  • Tensile Strength: ≥600 MPa
  • Shear strength: ≥90 MPa
  • Corrosion Resistance: Resists seawater corrosion; design life ≥ 100 years
  • Grouting pressure: 0.3-0.5 MPa
  • Anchor Length: Adjustable from 3m to 6m

Project Outcomes

2800 root

Anchor Bolt Usage

1.2 km

Construction segment length

≤15mm

Surrounding Rock Deformation Control

100+ years

Estimated useful life

Customer Reviews

"The Su'e Channel project imposes stringent material requirements. Send New Material's glass fiber hollow grouting anchor rods fully meet the corrosion resistance and strength demands of underwater tunnels. The products feature international advanced technical performance, are easy to install, and deliver excellent grouting results. Their professional and dedicated technical team provided robust support for the project."

Manager Wang

Head of Project Materials Department

Why Choose Anhui Sende New Material Technology Development Co., Ltd.

Over a decade of industry expertise

Established in 2017, we specialize in the R&D and production of fiber composite materials. We hold National High-Tech Enterprise certification and have passed annual reviews for six consecutive years.

Fully certified

Holds 7 invention patents, 19 utility model patents, and 14 Mine Product Safety Mark certificates; certified under the ISO9001 quality management system.

Custom Manufacturing

Own production facility of 17000 square meters, capable of customizing products in various specifications and shapes to meet diverse engineering requirements.

Professional technical team

Backed by an experienced R&D team, we provide end-to-end technical support—from solution design to construction guidance.

Stable delivery capability

Annual capacity of over 10000 tons with ample inventory ensures rapid order fulfillment and uninterrupted project timelines.

1000+ Engineering Validation

Widely used in subway, tunnel, mining, and water conservancy projects. Trusted by major state-owned enterprises including China Railway, China Construction, and China Communications, with a proven track record.

Sunde

Anhui Send New Material Technology Development Co., Ltd.

Specializing in the R&D and manufacturing of fiber-reinforced composite materials, we deliver high-performance, corrosion-resistant, and lightweight innovative solutions for engineering projects. Our core products include: GFRP rebar, fiberglass rock bolts, fiberglass tendons, I-beams, hollow anchor rods, waterproofing formwork ties, basalt fiber bars, and M10-U-bolts.

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