manzanilla-mayaro road presentation from pure
TRANSCRIPT
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Manzanilla-Mayaro Road Rehabilitation
Project
Programme for Upgrading Roads Efficiency
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The Manzanilla-Mayaro Road was rendered
impassable as a result of severe structural breaches
in the roads subsurface layers. A prima facie
investigation pointed to the persistent inclementweather experienced over several days preceding
the disaster as the precipitative cause of flooding
and the resultant collapse of the roadway.
CHALLENGE
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The Manzanilla/Mayaro Road:
Approximately 20km in length.
Connects Sangre Grande to Mayaro which
comprises villages of Ortoire, St. Joseph, Beau
Sejour, Plaisance, Pierreville, Beaumont, St. Ann's,Radix, Ste. Marguerite, Lagon Doux, Grand Lagoon
and Lagon Palmiste.
BACKGROUND
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LOCATION
Figure 1 : Location Plan
Alternative routes: Cunapo Southern Road and Plum Mitan
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LOCATION
Figure 1 : Location Plan
Alternative routes: Cunapo Southern Road and Plum Mitan
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PROJECT APPROACH
In order to develop an all-encompassing solution to a
disaster of this scale, the expertise and experience of a jointtask force was engaged, comprising :
Highways Division
Coastal Protection Unit Environmental, Health & Safety Unit
PURE Unit (MOWI)
Engineering Corps TT Army
UWI (Department of Civil and Environmental
Engineering and the Geomatics Department, of the
Faculty of Engineering)
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PROJECT APPROACH
Input was also sought from major stakeholders including:
Environmental Management Agency
Zoological Society
Utility Agencies
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OBSERVATIONS
Figure 2 : Existing Road Structure mainly consisting of layers of : Sand
Boulders, Asphalt
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OBSERVATIONS
Five road failures were initially observed:
Figure 3: Failed Area #1
Failed Area #1
Distance from beach facility - 1.2kmLength 124m
E 0713895
N 1160844
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OBSERVATIONS
Failed Area #2
Length 106m
E 0713944
N 1160646
Figure 4: Failed Area #2
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OBSERVATIONS
Figure 5: Failed Area #3
Failed Area #3
Length 40m
E 0713944
N 1160311
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OBSERVATIONS
Failed Area #4
Length 140m
E 0714022
N 1159501
Figure 6: Failed Area #4
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OBSERVATIONS
Failed Area #5 -
Length 140m
E0714048
N 1159145
Figure 7: Failed Area #5
Since our initial condition survey, latest reports indicate that a
sixth failure has emerged and the other five failures have
significantly deteriorated .
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PROJECT APPROACH
Concurrent pursuit of both short- term and long
term solutions in a phased integrated approach to
Achieve project objectives.
Phase 1 - Short Term: Restore Connectivity
Reinstatement of roadway.
Installation of Subsurface drainage.
Phase 2 Medium to Long Term: Holistic water
management - Coastal Protection Unit will discuss
Coastal Protection.
Wetland Conservation
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Road condition survey- 100%
Topographical surveys- 100%
Aerial reconnaissance - 100%.
Report acquisition- In progress
Geotechnical investigations- 90%
Hydrological information.- In progress
Tidal information.- In progress
Bathymetric surveys.- To commence shortly
Phase 1.1- DATA ACQUISTION
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Phase 1.2 SCOPE DEFINITION
The philosophy for the restoration works are:
A sustainable approach (temporary works will form
part of the permanent solution.)
Energy saving strategies for the restoration works
will be considered such as; use of recycling
technologies for salvaged and recovered materials
will underlie the design. Establishment of utility corridor within the cross-
section of the roadway.
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DESIGN CONCEPT
Road structure founded on a reinforced flexiblestone, overlaid with a recycled stabilised layer
comprising salvaged aggregate and asphaltic
materials, and surfaced with hot mix asphalt.
Encasement of the subsurface aggregate layers
within water permeable geotextile membrane
allows for water through flow while securing the
structural integrity of the road.
Geometry of the roadway will be constructed as
to maintain the hydraulic balance.
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Phase 1.3 -PROJECT COST-TIME
1.3.1 Preliminary Budget and schedule
Estimated STAGE A Cost of Phase 1 construction -Approximately TT$57M
Estimated Construction Duration: Two months.
Projected Start Date: To be determined
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Phase 1.4 -CONSTRUCTION
During this phase emphasis will be placed on
Delivering connectivity at the shortest time frame.
Construction of Temporary works - Coffer
damming and dewatering in-order to mitigate
flooding of the work zone.
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FIRST PHASE MISSION
Restoration of Connectivity
Reinstatement of roadway.
Re-Installation of Subsurface drainage.
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Thank you