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| 1 | PHASE-I |
| 2 | SOIL / GEOTECHNICAL INVESTIGATIONa)Mobilization of suitable tools & equipment, personnel and materials from laboratory to site for conducting geo-technical investigation work including all accessories, transportation, temporary setting etc and demobilization of the same complete as per the directions of Engineer- In - Charge. The soil investigation should aim to provide data for design of soil strengthening/ control measures, slope stabilization, retaining walls with appropriate foundation depth. Sub Surface Investigation Conduct of SPT by making 100 mm dia or prescribed size dia bore in any strata/rock up to minimum 12m depth at every 10m running length of the proposed area ( number of bore holes-4), collecting/conducting tests at the depths of 1m ,2m, 3m,4.5m, 6m, 9m, 10.5m,12 m as per IS-1892 : 2021 and related latest IS Codes for soil investigation to include as stipulated in IS 2131 and IS 2720 latest editions. Location of the bore holes will be as per the directions of Engineer-In - Charge.b)Soil Investigation of Proposed site comprises with following test:- (i)Direct/Triaxial Shear Test (ii)Grain Distribution curves & pattern in bore holes (iii)Type of soil,C-values (iv) Bulk Density (v)Natural moisture content (vi)Dry Density Item Continued as 1.02 |
| 3 | (vii) water table (viii) specific Gravity (ix)Atterberg limit (x)Hydrometer analysis (xi)Liquid & plastic limit (xii)Swelling index. Completion of laboratory test, collection of data, calculation of gross and net safe bearing capacity and preparation of report. NOTE :In order to conduct slope stability analyses and to design appropriate control measures for landslides, physical properties such as strength of slide plane, location and depth of slide plane and stable ground areas shall be determined. The appropriate tests out of the ones listed below shall be generally performed:-(a) Liquefaction analysis (As per IS 1893 Part-l (2016) for Earthquake analysis).(b) Soil mechanic tests as stipulated and applicable for the proposed site as per IS 2720 Parts 1 to 41 to include unconfinedcompression, tri-axial compression box shear, ring shear, and in- situ shear (Also refer to IS:7746-1991 for in-situ data sheet of shear test of rocks; IS:13047- 1991; section 3.2 of chapter 12 of the TRB Special Report 247, Landslides; Investigation and mitigation). |
| 4 | CONTOUR & DIGITAL TOPOGRAPHICAL SURVEYCONTOUR SURVEY : The site reconnaissance of area 1000.00 sqm shall include both site inspection and local enquiries concerning existing and proposed features on and adjacent to the site. With an approximate understanding of the overall topographic feature and knowledge of the distinction(s) of movement and aerial extent of the slide, a detailed field investigation plan can be developed to delineate the aerial extent and a general direction of movement of the landslide zone/scouring due to rain water assess the geology and geologic structure, estimate the cause(s) of the sliding/scouring, and predict future movement. The survey should include both the existing stretch of retaining walls and the stretch without retaining walls in order to evolve viable and sustainable structural solutions to stabilize the proposed stretch.Detailed Field Investigations and Mapping : A detailed investigation plan shall be drafted to delineate the :(a) Type of landslide, its size and mechanism and future possibilities.(b) Aerial extent of the slide, identification of the direction of deformation.(c) Location and shape of slide plane(s).(d) Nature of landslide block(s).(e)Possibility of further or future movement on slopes above the existing slide.(f) Distribution of ground water and its seasonal variation.(g)Type of soil in the site area. Item Continued as 1.04 |
| 5 | A detailed geomorphological map should be evolved which should assist in design of ground strengthening and slope stabilizing measures. DIGITAL TOPOGRAPHICAL SURVEY : The digital topographical survey of the area shall be carried out with DGPS/suitable levelling instruments/appropriate field survey methods, capturing all existing major topographical feature of the area like trees, nalias, water bodies, roads railway lines, structure etc. Spot level shall be provided in 5m center and contours at 0.30 m interval or as specified by Engineer-in-Charge. The contour map evolved should include the profile of the Vulnerable damaged retaining wallfrom the foundation level to existinginfrastructures in proposed area which should assist in design of retaining walls. |
| 6 | GEOPHYSICAL INVESTIGATION(a) Laboratory testing for soils : The geotechnical engineer should conduct sufficient in situ and/or laboratory testing to characterize the physical geotechnical parameters of the earth materials affecting the proposed development as specified in IS 2720 from Part 1-41.(b) Laboratory testing for rocks : The following testing of rocks shall be carried out:-(i) Preparation of rock specimen for laboratory testing as per IS:9179:1979.(ii) Determination of slope mass rating as per IS 13365.(iii) Determination of point load strength index of rocks as per IS:8764: 1998.(iv)Determination of unconfined compressive strength of rock materials as per IS 9143.(v) Determination of modulus of elasticity and Poisson\"s ratio of rock materials in uniaxial compression as per IS 9221.(vi)Determination of slake durability index of rocks as per IS 10050.(vii)Determination of tensile strength by indirect tests on rock specimens as per IS 10082.(viii) Determination of dynamic modulus of rock core specimens as per IS 10782.(ix) Determination of strength of rock materials in triaxial compression as per IS 13047.(x)Seismic testing of rock mass as per IS 13372. |
| 7 | GROUND WATER INVESTIGATION & SLOPE STABILITY ANALYSISInvestigation of ground water, shall includes determining ground water level, pore water pressure, ground water logging, ground water tracing test, pumping test, water quality analysis, electricity survey, geothermal survey, and geophysical logging (electric logging and radioactive logging). The seasonal variations in ground water and influence of ground water due to flooding by nearby natural source of water should be mapped during the investigation. Based on the results of the above measurements and tests, ground water control works can be planned and designed if affecting the stability of the proposed area as marked on Site Plan. |
| 8 | PLANNING, DESIGNING AND DRAWINGS INCLUDING DETAILED PROJECT REPORT DULY VETTED BY IIT / NITSubmit Detailed Project Report (DPR) for planning and designing of protective work alongwithfollowing data duly vetted by IIT/NIT as specified. (a) Reconnaissance data to includegeomorphology.(b) Topographical data including contour map, calculation of volume of soil to be excavated at site (in all items as per requirement) and soil profile.(c) Soil Investigation report.(d)Degree of protection required and proposed Slope Stabilization, to includeretaining walls, Gabion walls, RCC walls etc.(e)Detailed design calculations for all items for proposed structures.(f)Preparation of Construction Drawings including architectural and structuralwith detailed execution notes & technical specifications of all items as per relevant MORTH specification and relevant IS Code for Slope Stabilisation, Retaining walls.(g)Bill of Quantity (BoQ) for execution of proposed work. |
| 9 | NOTE FOR ITEM Nos. 1.01 to 1.07 : Scope given above is approximate / tentative and not exhaustive. Actual requirement shall be worked out on the basis of actual requirement which may require to carry out more type of test and / or more number of test if technical requirement is not fulfilled / achieved without any additional cost. The work shall be executed accordingly. |
| 10 | PHASE-II :- The work is situated in hill / valley / sloping terrain and the Contractor shall be deemed to have visited and examined the site and fully satisfied himself regarding site conditions, nature of soil, strata, gradients, access, restrictions in movement, climatic conditions, water logging, and all other factors affecting execution of the work before submission of tender. |
| 11 | Surface excavation not exceeding 30 cm in depth and averaging 15 cm in depth, getting out in any type of soil on hill / valley / sloping ground, including dressing the excavated surface to required lines, levels and slopes, and disposal of excavated material within 50 metres lead and lift up to 1.5 metres, complete, all as specified and directed.Note:Removal of vegetation, bushes, and shrubs from hill/valley side slopes, including stacking of useful materials and disposal of surplus materials from the slope with all leads and lifts, shall be included in the quoted rate. The rate shall also include the cost of all materials, machinery, labour, and other incidental charges required for completion of the work. |
| 12 | Demolition and removal of cement concrete of any description and in any position (including plain cement concrete and lime concreteon hill / valley / sloping ground, complete, including breaking up, cutting into pieces as necessary, lowering or raising from all heights and depths, loading, transporting and disposing of debris to a distance not exceeding 5 km, with all leads and lifts, complete, all as specified and directed.Note: The quoted rate shall be deemed to include cost of labour, tools & plant, machinery, and all incidental charges required for complete execution of the work, including thorough site clearance.. |
| 13 | Excavation by mechanical means (hydraulic excavator) in all kinds of soil, in areas exceeding 30 cm depth, 1.5 m width, and 10 m² plan area, or as per approved design, on hill, valley, or sloping ground. Includes getting out and disposal of excavated earth to a distance not exceeding 5000 m, lift up to 1.5 m, cutting, loading, transportation, handling, and disposal. Quoted rate includes all costs of labour, machinery, tools, plant, leads/lifts, and incidental charges. Work executed as per approved drawings, design specifications, and directions of Engineer-in-Charge, complying with IS codes, MoRTH/IRC standards, safety, and statutory requirements. |
| 14 | M&L for M-15 grade concrete (Nominal mix 1:2:4) with 40 mm nominal size graded stone aggregate, as in foundations, footings, bases of columns, plinth beams, rafts and mass concrete below ground level, including mixing in mechanical mixer, laying, compacting with mechanical vibrators, finishing top surface levelled, and curing complete,on hill / valley / sloping ground and directions of Engineer-in-Charge, complying with IS codes, MoRTH/IRC standards, safety, and statutory requirements. |
| 15 | M&L for Reinforced Cement Concrete (RCC) M-25 Grade (Design Mix) using 20 mm nominal size graded crushed stone aggregate as in concrete pedestal, jacketing and similar structural works on slope / hill / valley location, including design mix batching by weight, machine mixing, conveying to site of work, placing in position at all heights and depths, compacting with mechanical vibrators, finishing surfaces as required and curing and directions of Engineer-in-Charge, complying with IS codes, MoRTH/IRC standards, safety, and statutory requirements. |
| 16 | Supply, drilling and installation of Self-Drilling Anchor (SDA) system of minimum 38 mm / 19 mm (OD/ID) hollow bar having minimum yield load of 400 kN, or higher capacity as per approved design requirement, for slope stabilization / retaining wall anchoring, including drilling to required diameter, depth and inclination in any type of soil / rock strata, insertion of hollow anchor bar with sacrificial drill bit, extension using couplers as required, providing bearing plate minimum 200 mm × 200 mm × 10 mm thick, heavy duty nut, spacers / centralizers, and full-length pressure grouting through the hollow bar using cement grout with approved non-shrink admixture, complete, all as specified, shown on drawings and directed.Notes (Forming Part of the Item)1.Diameter (OD/ID), grade, length, inclination, spacing, embedment depth, plate size and grouting parameters shall be strictly as per approved structural design and drawings.2.The rate shall include drilling in any type of soil / weathered rock / hard rock, flushing, cleaning of bore hole, full-length pressure grouting, cutting off excess bar, tightening anchor head assembly, and protection of exposed anchor head if specified.3.Bearing plate, nut, couplers, drill bit, admixtures, machinery, grout pumps, labour, tools and plant, working in hill / slope / valley terrain at all levels, and all incidental charges shall be deemed included in the quoted rate.4.Proof load / pull-out testing shall be carried out as per design requirementand cost deemed to included in qoated rates5.No extra claim shall be admissible on account of change in diameter within design range, difficult strata, restricted access, gradient, water ingress, or terrain conditions.6. Work shall conform to approved design, project technical specifications and relevant IS codes/Morth/IRC. |
| 17 | Supply, drilling, installation and stressing of double corrosion-protected (DCP) multi-strand prestressed cable anchors as per approved design requirement, having minimum initial prestress load of 1094 kN, comprising not less than 6 Nos. of 15.2 mm dia 7-wire low relaxation prestressing strands (minimum breaking load 260.7 kN per strand), conforming to IS 14268, complete, including drilling of 150 mm dia bore hole (or as per design) to required depth and inclination, installation of anchor assembly, full-length grouting in two stages (bond length and free length as per design, with prestress bond length varying from 15% to 30% of total anchor length), stressing with calibrated hydraulic jack to specified load, locking off, and testing, complete, all as specified, shown on drawings and directed.Notes: (Forming Part of the Item)1.Diameter of bore hole, number of strands, bond length, free length, inclination, spacing, anchor capacity and stressing load shall be strictly as per approved structural design; however, the anchor capacity and strand configuration shall not be less than the minimum criteria specified above.2.Prestressing strands shall conform to IS 14268 and shall be 7-wire low relaxation type.Grouting shall be carried out in two stages using cement-based grout with approved admixtures, ensuring full encapsulation and corrosion protection.4.Drilling shall be executed in any type of soil / weathered rock / hard rock, including flushing, cleaning of bore hole and installation of temporary/permanent casing where required.5.Stressing and proof load / performance testing shall be carried out as per design requirement and relevant technical specifications inluding testing.6.The quoted rate shall include all materials, labour, strands, anchor head assembly, wedges, bearing plates, sheathing, corrosion protection system, grouting, stressing equipment, tools and plant, working in hill / slope / valley terrain at all heights and depths, leads, lifts and all incidental charges.7.No extra claim shall be admissible on account of difficult strata, restricted access, gradient, water ingress, terrain conditions, or minor variation in drilling depth within design tolerance.8.The item shall include HDPE sheath for free length, corrosion protection system for strands, centralizers, anchor head assembly, wedges, bearing plate, trumpet, protective cap, protective sheath for exposed portion above anchor head, casing for drilling in collapsible strata (if required), and all ancillary components necessary for complete anchoring system.. |
| 18 | M&L for TMT reinforcement bars 10 mm diameter and over, cut to length, bent to shape as required, including cranking, bending spirally for column hoops, hooks, laps, chairs, spacers, and binding with annealed mild steel binding wire not less than 0.90 mm dia (or securing with approved clips), inworks executed in hill / slope / valley terrain, complete, all as per approved drawings and Technical Specifications conforming to MoRTH Specifications (Clause 1600 & 2200), complete all as specified and directed by the Engineer-in-Charge. |
| 19 | Formwork for Substructures: Formwork to sides of concrete foundations, pedestals, footings, bases of columns, raft foundations and raft beams, including sides and soffits (if any) of foundation and plinth beams and similar substructure works. Vertical or battered surfaces for fair-finished concrete. Includes shuttering, centering, propping, bracing, fixing, removal after curing, and restoration. Includes all materials, labour, tools, plant, machinery, and handling, complete as per approved drawings, specifications, and directions of Engineer-in-Charge. |
| 20 | Providing and laying PVC weep holes of diameter and spacing as per approved design requirement, but not less than 100 mm internal diameter, in abutments, return walls, retaining walls and similar structures in hill / slope / valley terrain, including cutting openings in RCC/masonry, inserting unplasticized rigid PVC pipe of required length with proper outward gradient, fixing in position, sealing around with cement mortar, providing approved graded filter media or non-woven geotextile at the rear face as per design, making good disturbed surfaces, complete, all as specified, shown on drawings and directed by the Engineer-in-Charge.PVC pipes shall conform to IS 4985 or IS 13592 (latest revision), as applicable. |
| 21 | Providing and constructing subsurface drain holes (horizontal and/or inclined) in slope / hill face by drilling to required diameter and depth, and inserting perforated uPVC pipe of not less than 100 mm internal diameter or approved design , wrapped with approved non-woven geotextile, complete, all as per approved drawings and directed by the Engineer-in-Charge.Notes: (Forming Part of the Item)The work shall include drilling in soil/soft rock/hard rock to required inclination, cleaning of bore, insertion of perforated PVC pipe, wrapping with non-woven geotextile, sealing at collar portion with cement mortar, and making good disturbed surface, complete.Perforated PVC pipe shall conform to IS 4985 / IS 13592 (latest revision) as applicable.Non-woven geotextile shall conform to IS 16391 (Part 1 & 2) or relevant approved standard. |
| 22 | Supply and installation of 3D Erosion Control Mat for slope protection as per design and technical specifications, conforming to the following minimum requirements:3D erosion control mat shall be manufactured from UV stabilized PP/PET having minimum mass per unit area of 400 g/sqm, factory extruded/bonded onto steel wire mesh with 95% Zinc + 5% Aluminium (Zn-Al) coating. The composite system shall have minimum longitudinal tensile strength of 150 kN/m² or as specified in the approved design, whichever is higher.The work shall include preparation of slope surface, cutting, laying, proper alignment, required overlaps, anchoring with suitable GI/steel pins or anchor rods, tying, fixing, and providing all necessary accessories for complete installation, including all materials, labour, tools & plants, machinery, transportation, loading/unloading, curing (if required), complete in all respects as per approved drawings, design specifications and as directed by the Engineer-in-Charge. |
| 23 | Supply, fabrication, and installation of gabion units of 1 mminimum height made of mechanically woven, double-twisted, hexagonal steel wire mesh, meeting minimum requirements of IS 16014:2018, IRC SP:116, and MoRTH Clause 2500, or as per approved design specifications, whichever is higher.Gabion mesh: 10 × 12 mesh, mesh opening tolerance –10% to +10%, wire dia 2.7/3.7 mm (ID/OD), with Zn + 10% Al + PVC coating, mechanically edged/selvedged.Gabions shall have internal partitions at 1 m intervals, tied with lacing wire, and installed at indicated locations in dry condition at easily accessible sites .The work shall include cutting, assembling, tying, handling, transportation from nearest approach, all leads & lifts, tools, plant, machinery, labour, and materials, as well as filling the gabion units with stones.All work to be executed strictly as per approved drawings, design specifications, and directions of the Engineer-in-Charge. |
| 24 | Supply, laying, and installation of polyester needle-punched non-woven geotextile to serve as filter media behind gabion walls, conforming to MoRTH 700 Type-III or as per approved design specifications, whichever is higher Geotextile rolls shall have a minimum width of 4.5 m and shall be installed at top, bottom, and behind gabion walls at easily accessible locations Work shall include cutting, placing, unrolling, fixing, overlaps, and anchoring, as required for proper performance.Includes handling, transportation, leads and lifts, manpower, machinery, materials, and all incidental works necessary for complete execution.All works shall be carried out strictly in accordance with approved drawings, design specifications, MoRTH requirements, and as directed by the Engineer-in-Charge. |
| 25 | Providing and Backfilling Behind Gabion Wall: Backfilling with approved selected granular fill material obtained from private quarry or land (outside MOD). Includes all leads and lifts (within 1–2 km), segregation, spreading, compaction, and dressing as per MoRTH Clause 3100 & 2200, IRC:78 Clause 710.1.4 or approved design. Includes transportation, handling, manpower, machinery, materials, and all incidental works, complete as per approved drawings and Engineer-in-Charge directions. |
| 26 | Providing and Laying PCC 1:3:6 (Type C2) in Surface Channels and Drains: PCC with 1:3:6 mix (Cement:Coarse Sand:Coarse Aggregate) using 40 mm graded crushed stone aggregate. Includes mixing, placing, compacting, levelling, finishing, curing, and shaping as per approved drawings and technical specifications. Includes all materials, labour, tools, plant, and machinery for complete execution, as directed by Engineer-in-Char |
| 27 | Formwork for Walls, Retaining Structures, Abutments, Parapets, Staircases, and Similar Works in Hill/Slope/Valley Areas: Providing, erecting, and maintaining formwork to faces of walls, retaining walls, abutments, parapets, staircase railings, and similar structures, including attached pilasters, buttresses, offsets, and projections, vertical or to batter, for fair-finished concrete surfaces. Work includes shuttering, centering, propping, bracing, fixing, removal after curing, and restoration of surface. Includes all materials, labour, tools, plant, and machinery, transportation and handling in hill/slope/valley areas, complete as per approved drawings and directions of Engineer-in-Charge. |
| 28 | Earthwork Excavation by Mechanical Means in Hill/Slope/Valley Areas: Excavation by mechanical means (hydraulic excavator) in foundation trenches or drains, with minimum width 1.5 m or minimum plan area 10 m², or as per approved design, whichever is larger. Includes dressing of sides, ramming of bottoms, excavation in lifts up to 1.5 m, getting out excavated soil, and disposal of surplus soil as directed within a lead of 50 m. Applicable for all types of soil and terrain conditions. Includes all materials, labour, tools, plant, machinery, and incidental works for complete execution, as per approved drawings, design specifications, and directions of Engineer-in-Charge. |
