Modification work of 220kV S/C RTGH-JJN Tr. Line bw loc No. 342 and 343 at railway track crossing between railway TP point 316/9 and 317/0 of Ratagarh-Churu section as deposit work of Ms. Railway (MLIN/22.13) on labour rate contract basis

Detail Survey as per tentative route-

Which includes the following major activities-Pegging of line route, providing of survey pillar at an interval of 3-4 KM in the line route with required jungle clearance for survey, profile preparation of approved route on graph sheet and marking of offset on either side of line, marking of side clearance for hills, sand dunes etc, as per specification and tower scheduling.

Check survey as per approved route of line which includes-

Re-checking of the line route as per approved profile, chainage, tower center marking, pit marking, bisection of angle tower as required at site.

Excavation-

Excavation, excluding back filling, including shoring,shuttering, dewatering, etc. upto the required depth as per foundation specification/drawings.

(i) Any soil, soft rock other than hard rock

(ii) Hard Rock (with blasting subject to permission or without blasting)

SETTING OF TEMPLATE & STUB/ANCHOR BOLT

(A) Setting of template & stub/ anchor bolt & removal after concreting, excluding cost of excavation and concreting but including back filling with excavated/ borrowed earth (with lead & lift) in layers with ramming andwatering as per specification.

(i) Tower including extension +9m

(B) Anchoring of steel in the hard rock foundation and for excavation holes up to 0.5 cum on lift upto 1.5m

CONCRETING:

Providing and laying cement concrete for all types of foundation as per latest ISS:456 including cement, sand, stone aggregate 20mm nominal size,water etc., preparing surfaces, shuttering, mixing, placing, ramming, curing, finishing as per specification and drawings.

(ii) 1:3:6 Mix

(iv) 1:1.5:3 Mix

Cutting, bending, welding of joints if required,fixing and placing of steel reinforcement as per specification and drawings including material.

EARTHING:

(A) Earthing of towers with pipe type earthing excluding the supply of pipes, wires, flats &connectors, but including coke/charcoal, etc.,excavation,augering and backfilling in all types of soil.

ERECTION OF TOWERS:

Erection of super structures including D-shackles,ACD, Hangers, U-Bolts, step bolts, danger plate, phase plate, number plate etc. Also including tack welding of bolts & nuts upto bottom cross arm/beam level including application of Zinc Rich paint

(i) Erection of Tower (with extension upto +9m )

CONDUCTOR STRINGING

(B) Stringing of ACSR ZEBRA including hoisting of insulator string, laying, jointing & tensioning of conductor, clamping with Armour rods and fixing of vibration damper per route KM of the line.

(i) Single conductor

EARTHWIRE STRINGING

(A) Stringing of galvanised steel stranded wire including laying, jointing & tensioning, clamping,clipping and fixing vibration damper and earth bond etc.

(i) One No. 7/3.15mm galvanised wire

DISMANTLING OF TOWERS:-

Dismantling of super structures alongwith extensions, having tack welded Bolt & Nuts, including removing of D shackles, hangers, U-Bolts, step bolts, ACD, Danger plate, number plate, Phase plate of tower including transportation from site to our store and stacking of all material

(A) 132 KV and 220KV S/C & D/C Towers (all types)

DESTRINGING OF CONDUCTOR/ EARTH WIRE:-

(B) Destringing upto ACSR ZEBRA conductor : Dismantling of vibration dampers and armour rods, removal of conductor from clamps and fitting in rollers, detensioning,dehoisting of insulator string as required and collecting the material & depositing the same in our store and stacking.

(i) Single conductor

(C) Dstringing of Earth wire: Dismantling of earth bonds, vibration dampers, declipping and fitting in rollers, detensioning and collecting the material & depositing the same in our store and stacking.

(i) One No. 7/3.15mm galvanised wire

RESTRINGING OF CONDUCTOR / EARTH WIRE

(B) Restringing of ACSR ZEBRA conductor: Dismantling of vibration dampers and armour rods, fitting in rollers, de-tensioning, holding & lowering of conductor, de-hoisting of insulator string as required, adding / removing and jointing of conductor, hoisting of insulator string, lifting of conductor into rollers and re-tensioning, jointing, fitting of armour rods and and vibration dampers and clamping per route KM of the line section to be restrung dismantled material not re-used to be deposited in our stores & stacked

(i) Single conductor

(C) )Restringing of Earth wire: Dismantling of earth bonds, vibration dampers, declipping and fitting in rollers, detensioning, holding & lowering of earthwire, adding/removing and jointing of earthwire , lifting in to rollers and re-tensioning, jointing, clipping and fitting of vibration dampers & earthbond per route KM of the line section to be restrung. Dismantled material not re-used to be deposited in our store & stacked.

(i) One No. 7/3.15mm galvanised wire

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