Power Transmission & Distribution Project LARSEN & TOUBRO LIMITED ECC DIVISION Front Page www.engineersportal.in

LARSEN & TOUBRO LIMITED L&T was founded in Bombay (Mumbai) in 1938 by two Danish engineers, Henning Holck-Larsen and Soren Kristian Toubro. L&T is a technology, engineering, construction, technology, manufacturing and financial services company. In 1944, ECC was incorporated by the partners; the company at this time was focused on construction projects (Presently, ECC is the construction division of L&T) Company Profile – ECC division www.engineersportal.in

Project Overview Generation Transmission Distribution The following 765 kv transmission lines associated with Rihand-III & Vindhyachal –IV Transmission system includes two tower packages:- Tower package- P219-TW11 150Km Gwalior- Jaipur 765 kV S/C Transmission line, Part-I Tower package- P219-TW12 150Km Gwalior- Jaipur 765 kV S/C Transmission line, Part-II www.engineersportal.in

Salient Aspects of the Project Name of the Project: - 765 kV S/C Gwalior – Jaipur (PART-II) Transmission Line Project Client: - PGCIL (Power Grid Corporation Of India Ltd., New Delhi) Contractor:- M/S LARSEN & TOUBRO Ltd., Chennai Project duration: - 24 Months Start date: - 24-03-2011 End date: - 30-03-2013 Total Cost Of Contract : - Rs 78,04,62,752/- ( Rupees Seventy Eight Crore Four Lacks Sixty Two Thousand Seven Hundred Fifty Two Only) www.engineersportal.in

Project Route Gwalior Gangapur Lalsot Kothun Phagi www.engineersportal.in

Towers The transmission towers are self –supporting hot dip galvanized lattice steel. Type designed to carry the line conductors with necessary insulators, earth wires and all fittings under all loading conditions. The tower should be fully galvanized using mild steel or high tensile steel sections as specified. Bolts and nuts with spring washer are to be used for connection. Galvanisation-Galvanization (or galvanisation) is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting. www.engineersportal.in

Different Tower Sections www.engineersportal.in

Height Of A Transmission Tower 1. Minimum permissible ground clearance (H1) 2. Maximum sag of the conductor (H2) 3. Vertical spacing between top and bottom conductors (H3) 4. Vertical clearance between ground wire and top conductor (H4) www.engineersportal.in

Classification of Towers Type Of Tower Deviation Limit Typical Use A 0 deg. To be used as suspension tower B 0 deg.-15 deg. Tension tower for Earth wire. C 15 deg.-30 deg. To be used as section tower & for transposition of transmission lines. D 30 deg.-60 deg. Anchor tower for river crossing www.engineersportal.in

Purpose Of Using Different Tower 1. Tangent Suspension tower and it is generally A – type tower. 2. Angle tower or tension tower or sometime it is called section tower. All B, C and D types of transmission towers come under this category. www.engineersportal.in

Parts Of Transmission Tower www.engineersportal.in

Work Methods www.engineersportal.in Route alignment & Survey Soil Investigation Foundation Tower Erection Stringing Testing and commissioning www.engineersportal.in

Role Of Route Alignment & Survey The routing of the transmission line is most economical from the point of view of construction and maintaince. Thus optimal route should be used. Routing of transmission line through protected/reserved forest area should be avoided. The route should have minimum crossings of Major river, Railway lines, National/State highways. The number of angle points should be minimum. It is preferable to utilize level ground for the alignment. Crossing of power lines should be minimum. www.engineersportal.in

Role Of Soil For The Foundation Normal Dry Sandy Dry Soil Wet Nd-To be used for locations where normal dry cohesive or non-cohesive soils are met. Sd-To be used for locations where cohesion less pure sand or sand with clay content less than 10% met in dry condition Wt-Where sub-soil water is met between 1.5 meters and the depth of foundation below the ground level www.engineersportal.in

Role Of Stringing www.engineersportal.in 1.The machine is suitable to string one rope or one conductor. 2.The bull-wheel grooves are made up of high resistance interchangeable nylon sectors. 3.The machine is completely electronically controlled. www.engineersportal.in

Types Of Insurance Required Automobile Third Party Liability Liability Workmen’s Compensation Marine insurance for supply Employer’s Liability Installation www.engineersportal.in

Safety Systems And Safety Indices Objectives Establish and define chain of command for resolution of all hazards prevention issues Define individual hazards prevention and safety promotion responsibilities at each level of the construction team. Identifying highly hazardous operations within the scope of work and specify integrated preventive measures to mitigate the same. www.engineersportal.in

Safety Statistics of June 2013 S.NO DESCRIPTION NUMBER MAN-HOUR OT PERFORMED TOTAL 1 Company Staff 17 6052 Not Applicable 2 Departmental Workmen (including regular supply) 71 15336 9940 25276 3 Subcontractor's Workmen (including security personnel) 165 35640 23100 58740 Ot-Occupational therapy is skilled treatment that helps people become ... Goals  use of treatments to develop, recover, or maintain the daily ..... Performance skills GRAND TOTAL OF MANHOURS WORKED DURING THE MONTH 90068 www.engineersportal.in

MPCS and Reporting Systems Schedule of Construction program Schedule of Invoice Schedule of Milestone events Schedule of Plant & Machinery Schedule of Staff Schedule of labour Schedule of Material requirements Mpcs-Under MPCS, various reports are maintained like Cp-month wise target for each activity till completion and subsequently updating the actual accomplishments are listed Inv- Listing of activities for Planned vs. Actual Billing done as per the volume of work Executed Mil-critical activities comparing the planned vs. actual achievement. www.engineersportal.in

Major Constraints For The Transmission Line Project ROW Problems Tree Cutting Shut Downs Row-right of way Sd- railway crossings www.engineersportal.in

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