Hollow Bar Ground Anchors are supplied to G4 NTHS Expressway

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Hollow Bar Ground Anchors are supplied to G4 NTHS Expressway

The Beijing-Hong Kong-Macau Expressway is a 2,272.65 kilometers long expressway that connects the Chinese cities of Beijing and Shenzhen. When the expressway was completed in October 2004, it was China's first complete north-south expressway route.

The Drill Injection Hollow Bar Ground Anchors are used for spiling in the NATM tunneling of this expressway (e.g. Mt Wulong, Baolin, Danjiashao and Shimenao tunnels). The Drill Hollow Bar Ground Anchor provides a practical rock bolt that is quick and easy to install through fracture or broken ground. This Drill system method is available with a range of harder drill bits (Tungsten Carbide: button or chisel) for efficient drilling in stronger material.

Tunnel portal stabilization

In the construction of G4 tunnels, the spiles provide a protective canopy, tto enable the heading of a tunnel to be advanced without the risk of falling rocks. This is the advantage which New Austrian Tunneling Method (NATM) brings.

Spiles for support of tunnel crown

Tunnel Spiles and Forepoling are one of applications of hollow bar ground anchors. This rock bolt is used in the fast, single-step anchoring system like CTS, DYWI and so on. Soil Nails, Prestressed Ground Anchors and Micro Piles are the other applications.

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