Construction - Horizontal Directional Drilling Services
20 years of progressive experience Greely has become one of Canada's leading utility
construction contractors through the application of such innovative technology
as Horizontal Directional Drilling (HDD). We have been frequently called upon
to provide cost-effective and non-invasive solutions to our base of telecom, CATV,
hydro, water, sewer and gas customers. Greely Construction prides itself on its
ability to adapt its technology in order serve other markets that may require
traditional or specialized solutions. Site characterization and remediation techniques
utilizing HDD equipment are an example of this.
is Horizontal Directional Drilling?
The use of HDD was developed to
install utility pipes and cables beneath or around a variety of surface obstacles
including roads, rivers and railways. The technology was conceived in the 1970's
combining techniques used by road boring and oil and gas directional drilling.
HDD's are relatively compact and have a small footprint that allows the equipment
to be set up in relatively tight spaces such as the boulevard of a roadway.
Typically a small two-person crew is required including a drill operator and a
tracker. The tracker directs the progress of the drill by using a hand held device
that gathers data from a sonde located in the drill head just behind the bit.
Adjustment to the drill line and level is made throughout the process achieving
a very high degree of accuracy. After a pilot bore is complete, a reamer is pulled
back thus increasing the diameter of the bore to enable the placement of a pipe
or cable. Throughout the drilling and reaming process, drilling fluids and mud's
are used to lubricate the drill head, stabilize the hole and flush away the cuttings.
Horizontal Directional Drilling Advantage
HDD equipment has a relatively
short set up time and crew labour requirements are minimal. The method provides
a simple and effective way of obtaining sub-surface soil samples and enabling
site characterization of areas that are otherwise obstructed by man-made or natural
features located over top. By utilizing a specialized sampler bit, Greely can
quickly and accurately obtain a series of soil samples that can help determine
the existence and extent of sub-surface contaminants. Further applications of
its HDD equipment include the installation of in-situ drainage / pumping mechanisms
as well as the potential for bioremediation seeding. The footprint of the equipment
is small and it can therefore access hard to reach or congested areas. In addition,
costly reinstatement of the surrounding landscape is avoided.
Situ Sewer & Water System Rehabilitation - Pipe Bursting
amount of this sewer and water infrastructure across Canada is several decades
old and is approaching or is at the end of its life cycle. Such aged infrastructure
must be renewed or replaced to mitigate environmental risk and inconvenience to
the population. Cost-effective and reliable techniques are therefore required
by municipalities that struggle with budget constraints and negative public reaction
to the disruptive conventional construction techniques that are typically used.
A majority of existing sewer and water pipes have been covered over by streets,
sidewalks, landscaping and even buildings. Replacement by open trench construction
will be very disruptive due to the proximity of other utilities and the need to
excavate and replace everything above the affected pipe.
bursting can be used to replace pipes without using open trench methods. Pipe
bursting is accomplished by pulling a bursting device through the existing pipe.
This device by virtue of its size or its radial expansion capability shatters
the old pipe and forces the fragments into the surrounding soil. The new pipe
is usually attached to the bursting device and is thus pulled into place as the
Pipe bursting is receiving more and more attention as a
viable alternative to open trench replacement. Pipe Bursting can be used for pipes
ranging in size from 2 inches to 30 inches and new bursting tools and techniques
are being developed that will increase the upper limit to four feet. The process
can be used on pipes made of cast iron, thin wall steel, concrete, clay, asbestos,
PVC and polyethylene (PE)
Because it requires minimal
excavation, pipe bursting is a preferred solution for installing new pipes in
high- profile areas where disruption to surrounding businesses, resident and environment
is an important consideration. It also reduces overflow in wet weather and minimizes
the need for bypass pumping.
Wind Turbine Installations
Construction has been active in supporting the emergence of a sustainable market
for renewable energy systems within the province of Ontario. Specifically, Greely
has focused on providing customers with a unique, cost-effective "turn-key"
service for the design and implementation of mid-size wind turbine systems. These
turbines are rated in the 80 KW - 250 KW range and are typically mounted on 40
m towers and grid connected.
geotechnical investigation and tower foundation design by staff professional engineers
construction of tower foundation and materials quality control
- tower erection,
assembly of turbine and rotors and mounting of turbine on tower
- CAD plans,
drawings for construction and municipal approval
- final commissioning of entire
- routine and emergency maintenance programs post implementation
This technology has also given us the
opportunity to place kilometers of road drainage tile for various companies across
the provinces, since it is one of the most cost effective placement methods. The
use of high speed trenching was developed for the installation of utility pipes,
drainage tile and foundations. These trenchers are equipped with conveyors for
loading excavated material into dump trucks. Typically one trencher under normal
conditions will excavate kilometers per day.
Trenching widths from .3 to .6 meters.
- Trenching depths from .3 to 1.5 meters
Trenching through soil.
- Trenching through rock.
- Trenching through frost.
Subsurface Utility Engineering
Greely views Subsurface
Utility Engineering (S.U.E.) as an engineering process that is a proven effective
tool that can reduce the number of subsurface utility accidents, damages, claims
and significant construction delays. This process stands to locate, depict and
disseminate vital information before starting construction in order to avoid unwelcome
and costly surprises later on. The use of S.U.E. in the planning and design phases
of a utilities infrastructure project allows engineers to narrow down the geographic
regions where good quality information is required and proposes methods whereby
the location of utility conflicts can be physically and non-destructively determined.
- Subsurface Utility Designating: This service determines
the existence and
approximate horizontal position of underground utilities.
Utility Physical Locating: This service offers minimally invasive
of excavating including HydroVac equipment. This activity allows
precise determination of the horizontal and vertical position of the
utility to be documented and provides the highest quality data.
Utility Surveying: This service utilizes survey instruments such as
theodolites, rods and GPS. GPS surveying techniques also allow for the
transfer of data to CADD and GIS systems.
- Data Management: The data management
service ranges from updating
information on existing utility drawings or construction
plans to the creation
of completely new utility plans.
Services: In this final service, our professional staff within
affiliate companies can offer consultation, conflict determinations
coordination where and when warranted.
Greely Construction -
The "Greely Advantage"
Greely Construction prides itself
on giving our clients quality service by getting the job done right the first
time, on budget and on time. This is accomplished through the development of a
well-trained and skilled staff. Our supervisors are on site to monitor every phase
of the operation and are ready with informed responses and solutions. We have
the personnel and the tools to complete any project whether in environmentally
sensitive areas, remote locations or congested urban settings. Safety on our construction
projects is never compromised. It is one of our company's core values. We provide
a safe work environment for our staff and customers due to the work practices
we have developed to ensure risk to people and property is minimized. Its people
- honest, hard working, creative and professional, characterizes Greely.
Greely credits the evolution and complements its array of services by drawing
on the skills and experience of its affiliated companies, G-Tel Engineering and
Dig Safe. Both of these groups can provide direct and indirect project support
" G-Tel Engineering
An engineering and professional
services division with deep expertise in the design / build development of utility
projects. Its team of experienced professionals is positioned to provide support
ranging from utility design, CAD/GIS records management, coordination and permits,
utility locating and project management control. G-Tel maintains a permanent complement
of on-staff Professional Engineers.
that maintains a fleet of specializes in hydro vac trucks. Dig-Safe provides a
service that can locate subsurface utilities or structures in a minimally invasive
manner. Its vacuum equipment can also ensure a clean and safe environment.
combined capability of the three companies offers:
==> Best in class
skilled and innovative technical resources
==> An advanced Health &
Safety policy and training policy
==> Design / build turn key expertise
that can tackle large, complex projects
==> Ability to mobilize across Canada
==> A track record of success
Construction continues to develop and expand its horizons due to its innovative
culture and maintain its presence as a leader in the market place. Whether traditional
solutions or the development of leading edge applications, we are committed to
delivering quality driven services in a cost-effective and professional manner.
Greely Construction is proud of its accomplishments, but must also recognize the
contribution to the success of the company by its many talented and hard working
P.O.# 927 SMITHVILLE, ONTARIO, CANADA
G-TEL ENGINEERING SERVICES
200 HANLON ROAD, WOODBRIDGE,
Postal: L4L 3P6