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Trenchless technology, as the name implies, stands for subsurface
construction works where less trenches or no continuous trenches are required
to be dug. It is a rapidly growing sector of the construction and civil
engineering industry specially in the growing economies like China and India.
It can be defined as "A family of methods, materials, and equipment capable of
being used for the installation of new or replacement or rehabilitation of
existing underground infrastructure with minimal disruption to surface traffic,
business, and other activities."[1]
Trenchless technology can be broken down into two primary types:
Trenchless construction refers to such construction methods as tunneling,
microtunneling, horizontal directional drilling also known as directional
boring, pipe ramming, pipe Jacking, moling, auger boring and other methods for
the installation of pipelines and cables below the ground with minimal
excavation. Large diameter tunnels such as those constructed by a tunnel boring
machine (TBM), and drill-and-blast techniques are larger versions of subsurface
construction. The difference between Trenchless and other subsurface
construction techniques depends upon the size of the passage under
construction. If a subsurface construction doesnot permit the person entry it
is termed as Trenchless.
Trenchless rehabilitation refers to such construction methods as sliplining,
shotcrete, gunite, cured-in-place pipe, thermoformed pipe, grout-in-place pipe,
pipebursting, mechanical spot repair, and other methods for the repair,
rehabilitation, or replacement of existing buried pipes and structures without
excavation, or at least with minimal excavation. Trenchless Rehabilitation
methods are generally more cost-effective than traditional exhume (dig) and
replace methods and are common tools in modern water and sewer asset management
programs around the world.
The trenchless technology industry is represented by several industry
associations in addition to standing committees within almost every water and
sewer related industry association. The National Association of Sewer Service
Companies was established in 1976 and is the oldest such association with a
trenchless focus. The Indian Society for Trenchless Technology or IndSTT is the
apex organization to promote Trenchless Technology in South Asia. It was
established in 1995 with its head office at New Delhi. The International
Society for Trenchless Technology, established in 1986, has 25 active national
trenchless technology societies associated with it. Several organizations bring
out Technical Journals for sensitizing the readers about such techniques. No
Dig India is the official Journal of IndSTT and its copies are hosted on the
web for easy access.
mc mahant <[EMAIL PROTECTED]> wrote:
Could somebody explain "Trenchless Technology"
Is it Civil/Hydraulic/Solid-State Fabrication-----??
mm
------------------------------> Date: Fri, 23 May 2008 23:39:51 -0700> From:
[EMAIL PROTECTED]> To: [email protected]; [EMAIL PROTECTED]; [EMAIL
PROTECTED]> Subject: [Assam] Assam varsity awarded> > Assam varsity awarded> >
Source: Assam Tribune> SILCHAR, May 23 In recognition of being a part of the
team facilitating the growth and development of Trenchless Technology, Assam
University, Silchar recently received an award from Indian Society for
Trenchless Technology. The award was received by Prof Tapodhir Bhattacharjee,
Vice-Chancellor, Assam University from the chairman of Indian Society of
Trenchless Technology at India Habitat Centre, New Delhi on May 16.> > Prof
Topodhir Bhattacharjee said that this award which has been conferred on the
varsity for the year 2007-08, is an asset for the entire Assam University
fraternity.> > > > > _______________________________________________> assam
mailing list> [email protected]>
http://assamnet.org/mailman/listinfo/assam_assamnet.org
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