Boring - Trenchless International
Boring - Trenchless International
Boring - Trenchless International
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Industry review<br />
Figure 10. Upheaval pressure outbreak<br />
range.<br />
Figure 12. Distribution of the grouting<br />
materials.<br />
Figure 11. Injection range of grouting<br />
material.<br />
that the other part of the cylinder is the<br />
consolidated range of infiltration of the<br />
grouting. Therefore, the volume of the circular<br />
cone is determined as follows;<br />
V= (tan30°) 2 d 2<br />
3 π (5)<br />
V is the amount of injected grouting<br />
material and d 2 is the distribution depth<br />
of the pulse of injection of the grouting<br />
material.<br />
Step four: amount of injection for<br />
each pipe<br />
The amount of injection for each pipe<br />
is calculated as the multiplication of V,<br />
porosity and the injection rate. The injection<br />
rate is defined as the percentage<br />
of the real amount of injection in relation<br />
to the porosity of soil. As such the total<br />
amount of injection is calculated as the<br />
multiplication of the amount of injection<br />
of each pipe and the number of injection<br />
pipes. Table 1 shows an example of the<br />
calculation for the amount of injection for<br />
restoring a sewage pipe. The condition of<br />
the site is as follows;<br />
Diameter of pipes: 200 mm<br />
Type of pipes: pvc pipe<br />
Soil condition: cohesive soil, N value = 3<br />
Porosity: 70 per cent<br />
Overburden: 4.1 metres<br />
Length of restoration pipe length:<br />
15.0 metre<br />
Maximum height of restoration:<br />
60 mm<br />
An example of successful pipeline<br />
position restoration<br />
This method of restoring pipeline slacks<br />
via chemical injection was applied to a<br />
46.2 metre section of an 800 mm diameter<br />
pipeline. The pipeline was situated in<br />
sandy soil with an N value of 1–3 and had<br />
an overburden load of 9.5 metres due to<br />
inadequate support of the surrounding<br />
soil. Restoration using the chemical injection<br />
method saw the pipeline successfully<br />
lifted approximately 1,000 mm.<br />
This article has been adapted from a paper by<br />
Masashi Komura, Koichi Araki, Hideki Shimada,<br />
Takashi Sasaoka, Kikuo Matsui and Takahisa Tomii<br />
from the Department of Earth Resrouces Engineering,<br />
Kyushu University, Fukuoka and Fuso Technology<br />
Co. Ltd., Tokyo Japan. Please refer to the original for<br />
more detailed information and references.<br />
ISTT Membership/Directory<br />
Please complete the following form.<br />
MEMBERSHIP TYPE<br />
Corporate Membership<br />
COMPANY DETAILS<br />
Company/Organisation Name:<br />
Name of Affiliate:<br />
Please write ISTT if there is not an ISTT Affiliate in your country.<br />
CONTACT DETAILS<br />
Title:<br />
First Name:<br />
About ISTT/Membership<br />
Please note: Entry in the ISTT Directory is free to Corporate<br />
Members but only if the Industry Sector is completed.<br />
Alternatively, you can fill in this form online at www.istt.com<br />
The ISTT is the umbrella organisation for trenchless technologists in over 40<br />
countries of the world. In 22 countries groups of trenchless technologists have<br />
their own national groups which are affiliated while the remainder are registered<br />
directly with the ISTT.<br />
<strong>Trenchless</strong> technology covers the repair, maintenance, upgrade and new<br />
installation of underground utility services using equipment and techniques<br />
which avoid or considerably reduce the need for excavation. The ISTT promotes<br />
research, training and the more extensive use of trenchless technology<br />
through publications, co-operation with other NGOs, an annual international<br />
conference and an interactive website.<br />
<strong>Trenchless</strong> technology is recognised as an Environmentally Sustainable<br />
Technology and is particularly suited for use in densely populated urban<br />
areas by reducing disruption to peoples daily lives, social costs (traffic congestion,<br />
damage to road surfaces and buildings, air quality), noise and dust.<br />
<strong>Trenchless</strong> technologies also have a considerably reduced carbon footprint<br />
compared to trenching in most situations.<br />
Ordinary Membership<br />
Last Name:<br />
INDUSTRY SECTOR<br />
Please select the industry sector that<br />
best describes your company. Multiple<br />
selections can be made. Please check all<br />
relevant boxes.<br />
Agent<br />
Consultant<br />
Contractor<br />
Site Survey / Inspection /<br />
Leakage Detection<br />
Off Line Installation / Replacement<br />
Moling / Ramming<br />
<strong>Boring</strong> / Directional Drilling<br />
Pipe jacking / Microtunnelling<br />
On Line Replacement –<br />
Pipe Bursting / Splitting / Eating<br />
Repairs<br />
Internal Sleeves / Seals<br />
Resin Injection<br />
Robotic Repairs<br />
Renovation<br />
Cured in Place<br />
Sliplining (incl. spiral wound)<br />
the international society for trenchless technology<br />
April 2010 - <strong>Trenchless</strong> <strong>International</strong><br />
Position:<br />
Department:<br />
Address:<br />
City:<br />
State/County:<br />
Zip/Postal Code:<br />
Country:<br />
Telephone:<br />
Email:<br />
Website:<br />
Fax:<br />
Close Fit Lining<br />
Spray Lining<br />
Large diameter Systems<br />
(incl. segment lining, in situ lining<br />
and manholes)<br />
Equipment / Materials Supplier /<br />
Manufacturer<br />
Equipment Rental<br />
Public Sector / Utility<br />
Water / Sewerage<br />
Gas<br />
Electricity<br />
Telecoms<br />
Other<br />
Education / Research /<br />
test Laboratory<br />
April 2010 - <strong>Trenchless</strong> <strong>International</strong><br />
60<br />
61