Emergent slope protection works on valley side for maintenance and upkeep of existing NH717A between Km 61180 to 61266 Lava Algarah section on item rate basis in the State of West Bengal 2nd Call

Amount

Excavation in Ordinary Rock using Hydraulic Excavator CK-90 and Tippers with Disposal upto 1000 metres.

Excavation in Ordinary Rock by Manual Means

Providing and laying of Needle Punched and mechanically bonded non-woven Geotextile indigenously manufactured from high quality fibers on the prepared subgrade for Seperation. (Ref to MoRT&H’s 5 th Specification 702 ) 150 GSM Behind Gabion box Tier 1, Tier 2 & Tier 3

Supply and Installation of Self Drilling hollow soil/rock anchor of outer dia of 32 mm and inner dia of 18.5mm, yield load carrying capacity of minimum 230 kN in soil /overburden /rock suitable for, drilling placing and cement grouting.Installtions with all accessories such as 55mm dia drill bit , couplers, 8mm thick base plate and nut and bolt complete in all respect

SDA bar 6 m long @ 2 m C/C in longitudional direction & 1 m C/C Vertically with staggered pattern behind the Gabion box ( Tier1,Tier 2 & Tier 3)

Supply and Installation of Self drilling Hollow soil / rock anchor of outer dia of 38 mm and Inner dia of 19 mm, Yield Load Carrying Capacity of Minimum 400 KN in soil / overburden /rock suitable for drilling placing and cement grouting. Installation with all accessories such as 76 mm dia drill bit, couplers, 8mm thick base plate and nut and bolt complete in all respect.

Vertical SDA bar 6 m long @ 2 m C/C in horizontal direction to hold the Gabion box ( Tier1,Tier 2 & Tier 3)

Providing & making Gabion structure of size (2x1x1)m with Mechanically Woven Double Twisted Hexagonal Shaped Wire mesh Gabion Boxes as per IS 16014:2012,MoRT&H’s 5th revision clause 2500, of required size, Mesh Type 10x12(D=100 mm with tolerance of ±2%), Zinc+Polymer coated, Mesh wire diameter 2.7/3.7mm (ID/OD), mechanically edged/selvedged with partitions at every 1m interval and shall have minimum 10 numbers of openings per meter of mesh perpendicular to twist, tying with lacing wire of diameter 2.2/3.2mm(ID/OD), supplied @3% by weight of Gabion boxes, filled with boulders with least dimension of 200 mm, as per drawing, all complete as per directions of Engineer-in-charge.

Structural steel work in single section, fixed with or without connecting plate, including cutting, hoisting, fixing in position and applyinga priming coat ofapproved steel primer all complete.

Wall Base Tier 1, Tier 2 & Tier 3

H frame for support of Gabion box ISMC 100 (1 nos. in each box)

H frame for support of Gabion box ISA 60X60X6 ( (2 nos. in each box)

Behind the wall Tier 1, Tier 2 & Tier 3

H frame for support of Gabion box ISMC 100 (1 nos. in each box)

H frame for support of Gabion box ISA 60X60X6 ( (2 nos. in each box)