Highway Slope Manual

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may affect the proposed highway corridor(s)/alignment(s) and liaise with
the highway engineers on improvements to the corridor(s)/alignment(s), if
necessary,
(ii)
(iii)
identify any specific contractual or construction management issues
related to the likely geotechnical works and hazard mitigation measures
(e.g. contract form, supervision, design review, traffic constraints and
safety of road users, blasting control, access provision, etc.), and
provide preliminary estimates of the costs, programming and geotechnical
personnel requirements for the investigation, design and construction of
the geotechnical works and hazard mitigation measures and preliminary
estimates of the recurrent maintenance requirements.
(f)
For road improvement projects:
(i)
(ii)
(iii)
determine the safety standard for all of the existing man-made slope
features based on the anticipated use of the highway,
determine the date of construction of the features where possible and
check records to determine whether there is documentary evidence to
confirm if their stability is up to current safety standard, and
outline the necessary investigation and assessment of the stability and/or
the likely landslide preventive works required to upgrade the features to
the current safety standard.
(g)
Based on the available information:
(i)
(ii)
rank the alternative corridors/alignments based on the magnitude of the
geotechnical hazards present along each proposed corridor/alignment, and
recommend the appropriate rating to be used for the geotechnical factors
in the overall highway corridor/alignment evaluation process.
B.3 Deliverables
The Consultants shall produce:
(a)
A Geotechnical Review Report documenting the work done, the information
examined, the findings and recommendations, and including schematic plans and
cross sections at critical locations of the geotechnical works and hazard
mitigation measures proposed for the project. The GR Report shall include:
(i) a Geotechnical Feature and Hazard Map at a scale of 1:1 000 or 1:5 000,
showing the corridor(s)/alignment(s) considered and all catchments, the
source and areal extent of all geotechnical hazards identified, the locations