Pipejacking Tunnel Boring Machines TBMs. Michael Frenke, LOVAT Inc.

Transcription

1 Pipejacking Tunnel Boring Machines TBMs Michael Frenke, LOVAT Inc.

2 Pipejacking Tunnel Boring Machines (TBMs( TBMs) Introduction Pipejacking Sequence TBM Design Features Types of Jacking Pipe Pipejacking Considerations LOVAT Pipejacking TBMs

3 Introduction Pipejacking is a technique for installing underground pipelines via the use of a boring machine ahead of a pipe string, advanced through the ground by a jacking station in the main shaft. Pipejacking is a one pass lining method, where the pipes form and act as the finished tunnel liner. Pipes may be constructed of various materials (concrete, steel, fiberglass, clay, plastic). Pipejacking is used as an alternative to open-cut excavation, especially in smaller diameters and in deep or difficult ground conditions.

4 Introduction Pipejacking can be performed with: Tunnel Boring Machines (TBMs) Earth Pressure Balance and Slurry type Piloted from with TBM Micro Tunnel Boring Machines (MTBMs) Slurry type Controlled remotely from surface Auger Borers Hand Mining Shields

5 Pipejacking Sequence 1. Pipe lowered into shaft, onto main jacking station cradle 2. TBM advances using propulsion cylinders, muck cars filled with excavated earth and removed from shaft 3. Main jacking station thrusts pipe forward until TBM propulsion cylinders have retracted

6 Pipejacking Sequence 4. TBM advances using propulsion cylinders, muck cars filled with excavated earth and removed from shaft 5. Main jacking station stroked out completely, retracting TBM propulsion cylinders and burying pipe 6. New pipe is lowered in shaft and cycle restarted

7 TBM Design Features Overview Propulsion Cylinders Telescopic Leading Can Arch Ring Supports Main Jacking Station Intermediate Jacking Stations Tunnel Eye Seal Bentonite Injection System Ground Conditioning System Pipe Lock (Hyperbaric Airlock)

8 TBM Design Features

9 TBM Design Features

10 TBM Design Features Propulsion Cylinders

11 TBM Design Features Telescopic Leading Can

12 Support of TBM Ancilliary Equipment (Ventilation, Transformer, Power- Packs, Conveyors, etc.) TBM Design Features Arch Ring Supports Arch ring is expanded within the pipe sections

13 TBM Design Features Arch Ring Supports

14 TBM Design Features Installed at bottom of main shaft Main Jacking Station Provides forward thrust to advance the TBM and/or pipe string Integral Rail System

15 TBM Design Features Main Jacking Station

16 TBM Design Features Installed in-between pipes Intermediate Jacking Station Assists in forward movement of pipe string (inch-worm motion

17 TBM Design Features Bentonite Injection System Bentonite is used to reduce friction between the outside diameter of the pipe string and the surrounding ground. The system pumps the bentonite through ports in the TBM and the pipe into the surrounding excavation annulus. The system is usually automatic and interlocked with the advance of the TBM.

18 TBM Design Features Tunnel Eye Seal

19 TBM Design Features Ground Conditioning System Foam agent injection system used to control the earth pressure and consistency of the excavated muck Integral component of an Earth Pressure Balance (EPB) TBM

20 TBM Design Features Pipe Lock Airlock installed directly in pipe section Allows for hyperbaric interventions in high pressure environments and poor ground conditions

21 Types of Jacking Pipe Pipejacking TBMs can be configured to mine with all types of Jacking Pipe. The trailing edge of the Telescopic Leading Can is machined to fit the leading edge of the first pipe in the string, creating a seal against earth and water ingress. Type of Jacking Pipe Reinforced Concrete Pipe Steel Pipe Welded Joint of Permalok type Glass Fiber Reinforced Pipe HOBAS Plastic Pipe High Density Polyethylene (HDPE) Clay Pipe - Meyer

22 Types of Jacking Pipe Reinforced Concrete Pipe

23 Type of Jacking Pipe Steel Pipe Permalok Joints

24 Types of Jacking Pipe Glass Fiber Reinforced Pipe - HOBAS

25 Pipejacking Considerations Considerations for a successful pipejacking TBM tunnel: 1. Proper Geotechnical Investigation Extensive boreholes to determine what type of geology lies along the intended alignment 2. Tunnel Length Shaft to Shaft distances should be short (200m to 1,000m) Longer drives are possible using intermediate jacking stations 3. Lubrication Bentonite lubrication reduces friction on the outside of the pipe string ( float pipe if possible) Ensures pipe string will not bind-up between shifts or during long stoppages

26 Pipejacking Considerations 4. Ground Treatment Uses of conditioning agents mechanically alters the characteristics and behavior of the earth and reduces wear on the cutting tools and cuttinghead 5. Alignment Keep it straight for best results Wide curves are possible, but need to consider many other factors (pipe joints, specialized guidance systems, etc.) 6. Water-Proofing Reduce water and ground inflows into tunnel by utilizing tunnel eye seals and proper pipe joint seals

27 LOVAT Pipejacking TBMs RME106PJ Series Bern, Switzerland

28 LOVAT Pipejacking TBMs RME104PJ Series Milwaukee, USA

29 LOVAT Pipejacking TBMs Micro Tunnel Boring Machine (MTBM)

30 LOVAT Pipejacking TBMs DELIVERY MACHINE SERIES CURRENT DRIVE GROUND YEAR OPERATING CITY Meters 2006 MP90PJ Appelton, USA 1,800 1,2,3, MP104PJ Milwuakee 4,201 1,2,3, RMPS121PJ Pusan, Korea RMP101PJ Milwaukee, USA 1, RME101PJ Florida, USA RME106PJ Kraznoyarsk, Russia 2000 RME106PJ Zurich, Switzerland 1,200 1, 2, 3, 4, ME106PJ Bern, Switzerland 1,586 1, 2, 3, 4, MP101SE/PJ Southport, U.K. 2,400 2,3, MP79PJ London, U.K. 4, RMP121PJ Seoul, South Korea 480 4, RMP101PJ Brighton, U.K. 3,200 2, 3, MP112PJ Alexandria, Egypt 3, RMP113PJ/SE Glasgow, Scotland 2,300 1, 2, 3, MP134PJ Alexandria, Egypt 2,500 2, MP83/90PJ/RL Dallas, USA 4,270 2, 3, M104PJ Kenosha, USA 6,096 1, 3, 4

31 LOVAT Pipejacking TBMs DELIVERY MACHINE SERIES CURRENT DRIVE GROUND YEAR OPERATING CITY Meters 1990 MP117RL/PJ St. Louis, U.S.A. 6,401 2, MP86SE/PJ 9500 Cleethorpes, U.K 3, MP133SE/PJ 9300 Fort Worth, USA 4,572 1, 2, 3, MP77PJ 7700 Milwaukee, USA 4,572 1, 3, MP121/137RL/PJ 8600 San Diego, USA 4,572 2, MP118PJ 8200 Chieti, Italy 2,743 3, MP86PJ 8100 Deal, U.K 3,353 2, MP100PJ 7800 Blackpool, U.K. 2,743 2, MP90RL/SE/PJ 7600 Dallas, USA 5,791 1, MP77PJ 7200 Manchester, U.K 5,738 2, 3, M60PJ 3500 Cairo, Egypt 915 3, M77RL/PJ 6200 USA 4,572 4, M100/116SERL/PJ 6300 Glasgow, Scotland 3,500 2, 3, RM79/85SE/PJ 4900 Cleethorpes U.K. 8,600 2, 3, M100RL/PJ 1600 Toronto, Canada 9,144 3, M110/112PJ 2000 Detroit, USA 12,192 3, M96PJ 900 Toronto, Canada 2,743 2, 3