Providing and executing shotcrete lining works for sidewall and bed protection in the tunnel section at Km 1.00 of the Left Bank Canal under the Aruna Medium Irrigation Project

Item No. 1 : Cleaning grass and removal of rubbish upto a distance of 50 metres outside the periphery of the area as directed.

ITEM NO. 02 : -Providing and laying in situ cement concrete of grade M-25 of trap / granite / gneiss / quartzite / graded metal for RCC works of columns, beams and slabs, diaphragm walls, Road slabs trough (Box Culvert) trough for aqueduct, wearing coat, etc. with Batching Plant and Transit mixer including centering, shuttering, scaffolding, placing, compacting, curing etc. complete with all lifts as directed.

Item No 03 :- Removing wet silt from canal bed with 15 mtr.Lead and all lift including depositing the excavated stuff etc. Complete as directed.

Item No 04 :-Providing and laying insitu vibrated M-20 gradecement concrete using 20 mm clean, hard, graded aggregates for Invert (Kerb and bed) lining of tunnel through adit / itself including cost of all materials,machinery, labours,formwork,batching,mixing,conveying upto placing point in agitator car,placing inposition,laying,vibrating,finishing,curing,ventilation,lighting, draining and all other ancillary operations etc.complete with all lifts for Tunnel

Item No 05 :-Providing and laying insitu vibrated M20 grade cement concrete using 20 mm clean, hard, graded aggregates for side and arch lining of tunnel through shaft including cost of all materials, machinery, labour, formwork, batching, mixing, conveying upto placing point in agitator car, placing in position, laying, vibrating, finishing, curing, ventilation, lighting, draining and all other ancillary operations etc. complete with all lifts for Tunnel.

Item No.06:Dewatering by pumping out water collected with Diesel or Electrical pumps including cost of all materials, machinery, labour, providing sump and all other ancillary operations whenever necessary etc. complete under specific and indispensable circumstances with prior approval from competent authority with authentic evidence of records justifying dewatering etc. complete as directed.

Item No 07 :- Providing, fabricating and placing in position reinforcement steel for tunnel RCC works through adit / itself including cleaning, straightening, cutting, bending, hooking, lapping, welding joints wherever required, tying with binding wire including cost of all materials, machinery, labour, lighting, ventilation, drainage etc. complete with all lifts. (Specification: Section 4.5)

Item No 08 :- Providing and applying wet shotcrete (M-25 : 10MSA) 50 mm thick in two layers through adit / itself of tunnel including admixtures, neccessary machinery , labours ,scaffolding, lighting, drainage, ventilation with providing and all other ancillary operations etc. complete with all lifts.

Item no:-09 Providig and fixing welded mesh fabric for guniting of mesh size 75mmx75mm and 10guage thick including scaffolding etc.complete

Item No.10: Back filling up to ground level behind the canal structures etc. complete with suitable material of approved quality in layers not exceeding 20 cm without disturbing the structure etc. complete as directed.