AT - GRP-Injection System

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The AT - GRP-Injection System is an AT-SYSTEM with glass fiber reinforced casing pipes (GRP) which is installed self-drilling. This system is mainly used when steel is not desired in the ground or where injection pipes are excavated by a TBM afterwards.

The injection pipes permit an insertion of any kind of ground influencing injection media into the ground. These injections may serve for ground improvement or waterproofing. The AT - GRP-Injection System can thus be both installed in jointed rock as well as in weak ground conditions.

Contents

Introduction

Introduction ........................... ...................................................................................... 3

Fields of Application ........... ......................................................................................... 4

System Description ..................................................................................................... 4

Main Advantages .......................................................................................................... 4

System Components .................................................................................................... 5

Specifications .............................................................................................................. 5

Technical Features ....................................................................................................... 5

Installation Procedure .................................................................................................. 6

Accessories .................................................................................................................. 6

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■ Ground improvement combined with mechanized Tunneling

■ Waterproofing measures near openings and excavations

■ Waterproofing measures in water-bearing fault zones

The AT - GRP-Injection System is installed piecewise by rotary-percussive drilling with conventional drill booms.

The cooling of the drill bit and flushing of the cuttings take place inside the GRP tube.

■ Installation with standard drilling machines

■ Drilling works can be executed by standard personnel under the supervision of application engineers

■ Time-saving installation due to simultaneous drilling and tubing (self-drilling)

■ Installation using a preventer is possible

■ GRP pipe length may be adapted to the space available

■ GRP injection pipes can be cut and mucked out by a TBM cutting wheel

Fields of Application

System Description

Main Advantages

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■ AT - 76-GRP; outer diameter 76 [mm], wall thickness 8 [mm]

■ GRP standard tube lengths: 1.0 / 2.0 / 3.0 [m]

■ The length of the AT - GRP-Injection tubes is easily adapted due to the piecewise installation

■ Simple extension of GRP tubes even in constricted work zones

■ High drilling accuracy during installation

■ TBM drilling equipment may be used for installation

Specifications Technical Features

System Components

Ready-for-use AT - GRP-Injection System

AT - Starting Unit with Drill Bit

Coupling Adapter and Drill Rods

Various AT - Adapters

AT - GRP Drilling Adapter or Preventer Impact Adapter

AT - GRP Extension Tubes

AT - GRP Tail Casing Tube

Valves in Injection Holes

■ Standard version AT - GRP-Injection System ■ AT - GRP-Injection System for use in combination with preventers

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Installation Procedure

■ Flow-Pressure meter

■ Sleeve pipe packer

■ Deep injection packer

■ Mortar-Mixing pump

■ DYWI® Inject Systems

■ Fishing tab

■ Chain pipe wrench

■ Drill rod wrench

■ Rock drilling equipment: shank adapter, coupling, and coupling adapter

Accessories

1. The AT - Starting Unit with single-use Drill Bit is connected to the first GRP-Injection extension tube. This part is then prepared on the drill boom together with the adapter and the drill rods

2. Drilling of the first AT - GRP-Injection tube

3. The next GRP-Injection tube and the drill rod are connected with the previously installed part and are drilled subsequently

Standard version AT - GRP-Injection System

AT - GRP-Injection System for use in combination with preventers

4. Repeat the last step until the designed length of the AT - GRP-Injection pipe has been installed

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Please note: This brochure serves basic information purposes only. Technical data and information provided herein shall be considered non-binding and may be subject to change without notice. We do not assume any liabilityfor losses or damages attributed to the use of this technical data and any improper use of our products. Should you require further information on particular products, please do not hesitate to contact us.

"ALWAG" (AM 952/79), "AT" (AM 6138/2003), "AT-SYSTEM” (AM 6139/2003), "DYWI®" (4197869), "LSC" (AM 4326/2008), "OMEGA-BOLT®" (3258282), "POWER SET" (AM 6163/2002), and "TUBESPILE" (AM 4328/2008) are registered trademarks of DYWIDAG-Systems International GmbH."Combi Coat®" and "CT-Bolt" are trademarks of Vik Ørsta AS.DYWIDAG-Systems International GmbH is a partner of Vik Ørsta AS.

EMEADYWIDAG-Systems International GmbHAlfred-Wagner-Strasse 14061 Pasching/Linz, AustriaPhone +43-7229-610 49 0Fax +43-7229-610 49 80 E-mail alwag@dywidag-systems.atwww.alwag.com

North AmericaDSI Underground Systems Inc.9786 S Prosperity RoadWest Jordan, UT 84081, USAPhone +1-801-973 7169Fax +1-801-973 7172E-mail dsiunderground@dsiunderground.comwww.dsiunderground.com

South AmericaDSI Chile Industrial Ltda. Las Encinas #1387, Valle GrandeLampa, Santiago de Chile, ChilePhone +56-2-596 96 20Fax +56-2-596 96 69E-mail informaciones@dywidag-systems.clwww.dsi-chile.com

APAC/ASEANDYWIDAG-Systems International Pty. Ltd.25 Pacific HighwayBennetts Green, NSW 2290, AustraliaPhone +61-2-49 48 90 99Fax +61-2-49 48 99 56E-mail dsi@dywidag.com.auwww.dsiminingproducts.com/au

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