trenchless method in japan - gcus | global center for...
TRANSCRIPT
TrenchlessNew Installation & Rehabilitation
in Japan
Contents1. Why trenchless?
-For New Installation
2. What is Micro Tunneling?
3. What is Shield Tunneling with segment lining?
-For Rehab
4. What is Cured in Place Pipe(CIPP)?
5. What is Spirally Wound Pipe(SWP)
Why Trenchless? Less disturbing to society
No need relocation of other utility lines
Possible to cross rivers, railways and highways
What is Micro Tunneling?
Drive Shaft
Installation of Boring machine
Source: Japan Microtunneling Association
Drive Shaft
Pushing by jacking(red one)
Installation Jacking pipe
Source: Japan Microtunneling Association
7
Pipe
Thrust ring
Jacking rig
Exit eye
Drive Shaft
Source: Japan Microtunneling Association
Reception Shaft and completion
Backfill Grouting
Reception Shaft
Source: Japan Microtunneling Association
Source: Environmental Planning Bureau, Yokohama City
Diameter 4000mm (micro tunneling ) in Yokohama City
Jacking Pipe
(external diameter 4600mm)
Tunnel Boring Machine
Construction Period: From 2009 to 2011
Length: 320m
Source: Environmental Planning Bureau, Yokohama City
Diameter 4000mm (micro tunneling ) in Yokohama City
Jacking at drive shaft Inside
What is Micro Tunneling?
Reception
Shaft
Drive
Shaft
Vietnamese Trainees, Japan, February 26 to March 10, 2012
LectureSite Visit of
Micro tunneling Method
Source: Sewerage Business Management Centre
Training on Micro Tunneling
Site Visit of
Micro tunneling Method
What is Shield Tunneling ?
Source: Environmental Planning Bureau, Yokohama City
Shield Tunneling in Yokohama City
Tunnel Boring MachineDrive Shaft
Source: Environmental Planning Bureau, Yokohama City
Shield Tunneling in Yokohama City
First Cut Erected Segments
Source: Environmental Planning Bureau, Yokohama City
Shield Tunneling in Yokohama City
Secondary Lining Finished Pipeline
Damaged Pipe by Corrosion
18
What is CIPP ?inversion
pressure generator Boiler Deodorization
plug Liner end restrained
Section of CIPP
Liner(resin)
The damaged host Pipe
Installing Liner Inverting Liner
Before Rehabilitation After Rehabilitation
What is SWP?power supply profiled plastic strip
Rehabilitated Pipeline
Installation of SWP
Rectangular Shape Horseshoe Shape
Summary Time has come for trenchless to cope with heavy traffic
& urbanization
For new sewer installation, micro tunneling & shield tunneling with segment lining are recommended.
For rehabilitation, CIPP & SWP are options
Technology is transferred from Japan
Thank you for your attention!
Japan Sewage Works Association
Japan Global Center for Urban Sanitation