Protection work by Geo Synthetics Reinforce Wall method

Providing & applying Polyurethane Paint…

A Grid to F Grid ( HV Side)

F Grid to J Grid ( LV Side)

Grid J to Grid 1 ( 2nd floor to Ist floor)

Wall between HV & LV

Grid1 to Grid 8

Grid 1 to Grid 2

Ventilation /Valve Cooling Room Side

Grid2 to Grid 8

Coverter Transformer side (LV)

Grid J to Grid F up to wall Beam

Grid J to Grid 1below wall beam up to wall Beam

Converter Transformer side ( HV)

Grid A to Grid F up to Wall Beam

Grid A to Grid B below Wall beam

DC Yard Side

Grid 1 to Grid 8

TOTAL AREA FOR POLE 3

TOTAL AREA FOR POLE 3 & POLE 4 = ( 2x5699.94)

Hacking of CC Flooring & Cleaning of Surface…

Valve Hall

Valve Hall Cooling

Valve Hall Cooling

TOTAL

Providing mixing and applying Bonding Coat..

Valve Hall

Valve Hall Cooling

Valve Hall Cooling

TOTAL

Providing and laying APP (Atactic Polypropylene Polymer) modified…... prefabricated five layer 3 mm thick water proofing membrane, black

Valve Hall

Valve Hall Cooling

Valve Hall Cooling

TOTAL

" BOQ item details for Protection work by Geo Synthetics Reinforce Wall method at Tower Loc. 54 & 55 of 220KV SC Birpara_Malbase TL & 400 KV D/C TALA-Binaguri -2 TL (Ckt-I & II) LOC NO 87 & 88 under Birpara TLM. Specification Nos.: ER2/NT/W-MISC/DOM/E00/23/00733/I-3738/RFX-5002002613

Supply of Geo synthetics Reinforced Wall (Gravity type) Chain of 30 M Length as per specification below: a) Vertical Height 6 feet & bottom width 8 feet; 35 Chambers @3'X3' make one chain - 105 feet long; interconnected baffle walls and peripheral surfaces of HSP. Manufactured with minimum 20p laminated film. b) Ultimate tensile strength of 27 Kn/m in CD/MD as per ASTM D4595; c) Wide width tensile elongation of 17%; d) Tranpezoidal tear of 445N (ASTM D4533); e) Mullen burst of 2930 Kpa (ASTM D3786); f) Permittivity of 0.05/sec (ASTM D4491); g) UV of min 70% @500 hours (ASTM G154); All above values are MARV except UV which is TYP of the agreed primary sample lot and all are deduced as per sampling procedures defined in ASTM D4354 for all 3-levels of testing. The trap-bag shall have 3'x3' top opening for filling and vertical height of 6' in the back and tapering off into a slope in front which ends in 1' vertical drop to meet the bottom layer measuring 8' from the rear vertical face. 35 such chambers form one chain with water proof joining arrangement at its both ends that shall end in flaps to cover the first cell of the connected chain. Stitching (as per ASTM D4884) shall be along the cellular priphery only with not less than 300 denier PET thread while ensuring the bends are curves and not rectangfles, extending into subsequent stitch lines upto a distance sufficient enought to ensure homogenous bond strength.

Labour charges for aligning, Levelling, Placement, Filling & Hydro-compacting ofGeo synthetics Reinforced Wall (Gravity type) with specified filling materials including labour cost for scaffolding as per direction of Engineer-In-Charge.

Supply of non-woven Geo-textile fabric sheets of 300 GSM manufactured from 100% virgin Polypropylene (PP) fibre with minimum properties as per IS 16653:2017 (i) Wide Tensile strength (MD) ≥15KN/m & Wide Tensile strength (CD) ≥15KN/m (ii) Elongation (MD) ≥50% & Elongation (CD) ≥50% (iii) Abrasion ≥95% (iv) Trapezoidal Tear Strength (MD) ≥340 N & Trapezoidal Tear Strength (CD) ≥340 N (v) CBR Puncture strength ≥3000 N (vi) Permittivity ≥1.25 s-1 (vii)Permeability ≥60l/m2/sec (viii)AOS ≤75micron (ix)UV Resistance @500 hours retained Tensile strength (MD) & (CD) ≥80% (x) Mass ≥ 300gm/m² (xi)Thickness at 2KPa ≥3mm.

Supplying and laying of Woven Geotextile made from polypropylene multifilament yarn, having minimum mass of 240 GSM & as per TS and laying at interface of subgrade and blanketing layer, including transportation, contractor's labour, lead and lift complete as per directions of Engineer-in-charge.

Supply empty 300 GSM Non-woven Geo Textile Bag (1.00m X 0.70m)

Labour Charges for 300 GSM Non-woven Geo Textile Bag (1.0mX0.7m) filled with locally available dry earth/sand and stitching properly the open end with double ply string and placing in position both standing or flowing stream as directed with all lifts and leads upto 90 metre. (Volume of dry earth/sand in each bag is 0.122 Cum)

Supply and Installtion of 350 GSM Double Layered Geo Composite Mega size Bags (2 M X 1.5M) as per specification. a) Woven geo textile for the outer cover. The woven geo textile is woven with UV resistant silt film tape fiber with MARV value of the following properties . It should resist UV degradation rotting and biological degradation naturally encountered acids and alkalis. i) Mass per unit area 9ASTMD5261): 210g/sqm ii) Wide width tensile strength Machine direction (ASTMD4595): 28KN/m iii) % elongation at failure in machine direction (ASTMD4595): 22% iv) Trapezoidal tear strength (ASTMD 4533): < 450N v) Puncture resistance (ASTMD 4533): > 500N vi) Permittivity (ASTMD 4491): 0.035 S-1 vii) Water flow (ASTMD 4491): 150 lit/min/sqm viii) AOS (ASTMD 4751): 0.450mm ix) UV resistance (ASTDM4355): 70% per 500 hours b) Non-woven geo textile for the inner cover: It is needle punched non woven geo textile made of 100% polypropylene staple fibers which are formed into a random network for dimnsional stability. It should resist UV degradation rotting and biological degradation, naturally encountered acids and alkali. i) Mass per unit area 9ASTMD5261): 140g/sqm ii) Wide width tensile strength Machine direction (ASTMD4595): 6.50KN/m iii) % elongation at failure in machine direction (ASTMD4595): >50% <80% iv) Trapezoidal tear strength (ASTMD 4533): 190N v) Puncture resistance (ASTMD 4533): 350N vi) Permittivity (ASTMD 4491): 1.25 S-1 vii) Water flow (ASTMD 4491): 3500 lit/min/sqm viii) AOS (ASTMD 4751): 0.280mm ix) UV resistance (ASTDM4355): 70% per 500 hours c) Details of yarn for stitching for the geo bags i) Type of yarn polyster/polypropylene/nylon (Multifilament Twisted) ii) Denier-2500-3000 iii) Strength 10 to 15 Kg iv) Type of Stitch: Chain Stitch(Twin/double seams) v) Stitches: 8 to 12 stitch/100m All the above values are MARV, excluding AOS calculated with 60 specimens made out of 10 samples as per ASTMD 4354

Labour Charges for filling and laying of 350 GSM Geo Composite Mega size Bags (2MX1.5M) by locally available soil/sand and stitching properly the open end with double ply string and placing in position both standing or flowing stream as directed with all lifts and leads up to 90 metre. (Volume of dry earth/sand in each bag is 0.244 Cum) RBM/SAND FOR FILING, BAGS, BACKFILL.

Earthwork in excavation in the canal/drainage channels/borrow pits/river bed/slope of bank as noted below as per designed section & throwing the spoils in layers of 25cm for making banks as per profile or to deposit the same in any other place within an initial lead of 30m and initial lift of 1.5m including breaking clods, rough dressing etc complete as per direction of the Engineer-in-charge.

Ordinary soil/local soil/soil mixed with moorum or kankar/sil, dry or moist/slushy silt/sticky soil.