REQUEST FOR PROPOSALS

maps, topographical maps, geological/geo-morphological maps, aerial
photographs etc. for general understanding of existing slide area and to
Identify potential slide areas. This shall be followed by further
investigations like geological/geotechnical/hydrological investigation
to determine specific site conditions prevailing in the slide area as per
relevant IRC specifications/publications, MORT&H circulars and relevant
recommendations of the international standards for hill roads. The result of
the investigations shall provide basis for engineering analysis and the
design of protection/remedial measures.
4.11.4.4 a) For tunnels if required, geotechnical and subsurface investigation
shall be done as per IRC: SP: 91.
Geotechnical and subsurface investigation and testing for tunnels shall
be carried out through the geotechnical Consultants who have the
experience of geotechnical and subsurface investigation in similar
project.
13 4.12.1(1) The ‘good for tender’ designs and drawings shall be prepared.
14. The Consultant shall also carry out ‘good for tender’ designs and drawings for the
following:
a) cross sections at every 25 m intervals
b) Slope stabilization and erosion control measures
c) Design of protection/control structures in areas subject to subsidence, landslides,
rock fall, rock slide, snow drifts, icing, scour, avalanche activity etc.
d) Design of protective structures in slip prone and unstable areas
e) Design of scenic overlooks, watering points etc.
f) Safety features specific to hill roads
15. 4.12.2 (1) The Consultant shall evolve Design Standards and material specifications
for the Study primarily based on IRC publications, MORT&H Circulars and relevant
recommendations of the international standards for hill roads for approval by
NHIDCL
16. 4.12.2(2) The Design Standards evolved for the project shall cover all aspects of
detailed design including the design of geometric elements, pavement design, bridges
and structures, tunnels if required, traffic safety and materials.
16. 4.12.3
17. 4.12.4
Wherever practicable/feasible hairpin bends and steep gradients shall be
avoided by realignments, provision of structures or any other suitable
provisions.
While designing pavement for hill roads specific aspects relevant to hill
regions like terrain & topographic conditions, weather conditions, altitude
effects etc. shall be duly considered and suitably incorporated in design so
that pavement is able to perform well for the design traffic and service life.
Effects of factors like heavy rainfall, frost action, intensive snow and
avalanche activity, thermal stresses due to temperature difference in day
and night, damage by tracked vehicles during snow clearance operations
etc. must also be considered along with traffic intensity, its growth, axle
loads and design life.