Trenchless technology involves installing underground pipes, cables, and ducts without excavation by using techniques like horizontal directional drilling, microtunneling, pipe bursting, and pipe ramming. It has two main applications - new installation of lines and rehabilitation/renovation of existing lines. Proper surveys and investigations are needed before using trenchless methods. In India, common trenchless techniques include directional drilling, ramming, moling, and auger boring. Trenchless technology is needed due to problems with conventional trenching and its advantages in urban areas. With increasing infrastructure needs, trenchless methods provide cost-effective solutions while minimizing environmental and social impacts.
Trenchless Technology is the the science science of installing, repairing and renewing underground pipes, ducts and cables using techniques which minimize or eliminate the need for excavation.
It is basically basically making a tunnel below the surface and installing service lines like water or gas pipes, pipes, electric or tele communication cables etc.,with out any disruption to the public .
INTRODUCTION TO DRAG LINE AND THEIR WORKING PROCESS PLUS THEIR TYPE AND USES IN CONSTRUCTION SITE
THIS PRESENTATION IS OVER THE CONSTRUCTION EQUIPMENT USED IN DAILY BASIS
Trenchless Technology is the the science science of installing, repairing and renewing underground pipes, ducts and cables using techniques which minimize or eliminate the need for excavation.
It is basically basically making a tunnel below the surface and installing service lines like water or gas pipes, pipes, electric or tele communication cables etc.,with out any disruption to the public .
INTRODUCTION TO DRAG LINE AND THEIR WORKING PROCESS PLUS THEIR TYPE AND USES IN CONSTRUCTION SITE
THIS PRESENTATION IS OVER THE CONSTRUCTION EQUIPMENT USED IN DAILY BASIS
Trenchless construction. Trenchless construction includes such construction methods as tunneling, microtunneling (MTM), horizontal directional drilling (HDD) also known as directional boring, pipe ramming (PR), pipe jacking (PJ), moling, horizontal auger boring (HAB) and other methods for the installation of pipelines and cables below the ground with minimal excavation.
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Here is the some basic information regarding Tunneling & Rock Drilling Equipments which I have collected from different resources (Internet,Professors,Experts,Engineers,Companies etc). It would be very helpful for M.Tech students of Construction Engineering & Management.
-RAJARSHI
Trenchless construction. Trenchless construction includes such construction methods as tunneling, microtunneling (MTM), horizontal directional drilling (HDD) also known as directional boring, pipe ramming (PR), pipe jacking (PJ), moling, horizontal auger boring (HAB) and other methods for the installation of pipelines and cables below the ground with minimal excavation.
trenchless technology pdf
trenchless technology methods
trenchless pipe technologies
trenchless technology contractors
trenchless technology institute
trenchless technology center
trenchless technology conference
trenchless construction methods
interesting civil engineering topics
civil engineering topics for presentation
seminar topics pdf
best seminar topics for civil engineering
civil seminar topics ppt
civil engineering seminar topics 2019
seminar topics for mechanical engineers
mechanical engineering seminar topics 2018
Here is the some basic information regarding Tunneling & Rock Drilling Equipments which I have collected from different resources (Internet,Professors,Experts,Engineers,Companies etc). It would be very helpful for M.Tech students of Construction Engineering & Management.
-RAJARSHI
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Directional Boring or Horizontal Directional Drilling has replaced all the traditional drilling methods. It has several benefits and has found its way into applications like waterways, roadways, and more. This technique is time-saving and requires less resources comparatively. This piece explains how the entire drilling process is performed while highlighting its benefits as well.
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Construction process
1- Pilot drilling between pits (launch and exit pit)
Drill starts at the launch pit where the drill rig
is positioned.
A steering system is used to guide the drill
bit along the planned route from the entry to
the exit.
Different guidance systems can be used
depending on the depth of the drill and
surface conditions.
A drilling “mud” is often used to facilitate the
drilling.
Drill rods are linked together to form a drill
string. These will assist operations in later
steps.
Cuttings are removed and drilling fluids are
cleaned and recycled.
Horizontal directional drilling (HDD) machines are steerable, trenchless drilling rigs for the installation of pipes, conduits, and cables underground in a shallow arc. They are commonly used for installations below waterways and roadways to avoid disturbing the ground above.
Horizontal drilling machines are typically heavy-duty vehicles fitted with track drives, operator controls, and drilling machinery. Materials used for pipes include PVC, polyethylene, polypropylene, ductile iron, and steel.
A Non disruptive Technology or a trenchless technique with the help of machine(HDD) for laying any kind of Pipelines including OFC, Power Cable, Water, Sewerage Pipelines & CNG/PNG etc..
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2. CONTENTS
INTRODUCTION
TRENCHLESS TECHNOLOGY METHODS
PRE-REQUISITES
TECHNIQUES OF TRENCIILESS TECHNOLOGY
IN INDIA
NEED FOR TRENCILESS TECHNOLOGY
CONCLUSION
REFERENCES
3. INTRODUCTION
Trench less technology is the science of
installing, repairing and renewing
underground pipes, ducts and cables using
techniques which minimize or eliminate the
need for excavation. Trench less technology
is basically making a tunnel below the
surface and staling service lines like water or
gas pipes, electric or telecommunication
cables etc, with out any disruption to the
public.
5. NEW INSTALLATION
Methods for installation of a new pipeline
or duct, including dealing with service
connection are:
1) Microtunelling
2) Horizontal directional drilling
8. PRE-REQUISITES
Surveys and site investigations are essential to the
success and efficiency of trench less installations and
repair techniques.
(a) The survey results help to determine the most
appropriate systems.
(b) The investigations methods include geophysical
surveys, boring and sampling, measurement of
ground water table, test pits and trenches,
penetration tests, examinations and investigations of
existing structures.
10. DIRECTIONAL DRILLING
Directional drilling involves steerable tunnelling
systems for both small and diameter lines. The
first stage consists of drilling a small diameter
pilot hole along the desired centre line of a
proposed line and in the second stage, the pilot
hole is enlarged to the desired diameter to
accommodate the utility line and to pull the utility
line through the enlarged hole
11. Advantages
The major advantage is the speed of installation
combined with the minimum environmental and social
impact.
Long and complicated crossings can be accomplished
with a great degree of accuracy.
Another advantage is that sufficient depth can be
accomplished to avoid other utilities.
Limitation of access and reception pits is another
advantage.
12. Disadvantages
Special equipment and very high degree of
operation skill is required.
As the cost of the equipment and the operation
are high, bore length should be sufficient in
order for it to be economical.
Mainly steel pipe is being installed by the
method.
13. RAMMING
In this method, the pipe is rammed through the soil
by using a device attached to the end of the pipe
to drive the pipe through the soil. In this method,
the tool does not create a borehole. It acts as a
hammer to drive the pipe through the soil. When
ramming pipe, the leading edge cuts a borehole,
the spoil enters the pipe and is compacted as it is
being forced to the rear of the pipe.
15. Advantages
The pipe ramming is an effective method for
installing medium size pipes.
The method is economic since the equipment cost
is not very high and the operation is simple.
The pipe can be installed in one piece or segments.
This can be used in almost all types of soils.
The method does not require any thrust reaction
structure.
16. Disadvantages
The major disadvantage is that there is no
control over the line and grade and in case of
obstructions like boulders, the pipe may be
deflected.
Then work should be stopped immediately.
For small diameter pipelines, the method is
economical, but for large diameter pipes, the
equipment cost is high.
17. MOLING
Moling is a method, which forms the
borehole by compressing the earth that
immediately surrounds the compacting
device which is an underground piercing
(mole) is propelled by a power source.
The tool is streamlined into bullet or
shape. The method is restricted to
relatively small diameter lines in
compressible soil conditions.
19. Advantages
It is a rapid, economic, and effective method of
installing small diameter lines.
Any type of utility line can be installed using the
method.
The stability of the soil around the borehole is
increased due to compaction.
The investment in equipment is minimum.
20. Disadvantages
Compaction methods are limited in their
length by reliability because basic systems
are unintelligent, unguided tools that tend
to bury themselves, surface in the middle
road or damage existing utility lines.
21. AUGER BORING
The auger horizontal earth boring is a process of
simultaneously jacking casing through the earth
while removing the spoil inside the casing by
means of a rotating flight auger. The auger is a
flighted tube having dual functions, firstly it has
couplings at each end that transmit torque to the
cutting head from the power source located in
the bore pit and secondly, it serves to transfer
spoil back to the machine.
23. Advantages
The major advantage is that the casing is
installed at the same time as the borehole
excavation takes place.
This method can be used in a wide variety
of soil types.
24. Disadvantages
This method requires different sized cutting
heads and auger sizes or each casing diameter,
which increases the investment in equipment.
The investment in bore, pit construction, and the
initial setup is also required.
In case of soils containing large boulders, this
method cannot be used advantageously.
25. NEED FOR TRENCHLESS
TECHNOLOGY
(1) The disadvantages and difficulties
encountered in conventional trenching methods
have resulted in thinking of the need for
trenchless technology.
(2) The advantages of the no-dig technology are
also responsible for the need of this technology
to be adopted in mainly urban areas
26. CONCLUSION
With all round developments in various fields like
petrochemicals where conveyance of gas, crude
and refined products over long distances is
common, telecommunication and power, water
supply and sewerage etc.
Also if costs benefit analysis of the two systems is
conducted, considering both direct and indirect
costs, it will help us make informed divisions on
technology selection, under different
circumstances.
27. REFERENCES
1) Jagadish Chandra, Trenchless Technology in
India: Need of the New Millennium. Civil
Engineering and Construction Review October
2000- page 48
2) Maninder Singh, Techniques of Trenchless
Technology In Use In India. Civil Engineering and
Construction Review October 200- page 43
3) Dr.Neeraja Lugani Sethi, Pre- Requisites for
Trenchless Technology. Civil Engineering and
Construction Review October 2000- page 21