Presentation on theme: "CONSULTING ENGINEERS LIMITED PLANNING AND DESIGN OF SEWERS USING ADVANCED TECHNIQUES FOR PROPOSED SEWERAGE SYSTEM OF DISTRICT- I FOR KANPUR CITY UNDER."— Presentation transcript:
CONSULTING ENGINEERS LIMITED PLANNING AND DESIGN OF SEWERS USING ADVANCED TECHNIQUES FOR PROPOSED SEWERAGE SYSTEM OF DISTRICT- I FOR KANPUR CITY UNDER NGRBA PROJECT 12 Dec International Conference on Sustainable Clean Ganga Mission: Opportunities & Challenges By Sanjay L. Lalan, J. K. Singh, A. S. Gupte Ministry for Water Resources, River Development and Ganga Rejuvenation
CONSULTING ENGINEERS LIMITED INTRODUCTION National Ganga River Basin Authority (NGRBA) has taken up projects for “Mission Clean Ganga” under which no untreated municipal sewage or industrial effluent would be allowed to be discharged into the river Ganga by the year NGRBA Objective - to provide integrated sewerage system for collection of sewage and providing STP for treatment before discharging sewage into River Ganga and preventing pollution of river Ganges and for sustainable development of surrounding areas. NGRBA has taken up sewerage project initially in Allahabad & Kanpur cities. Tata Consulting Engineers Ltd. was awarded Consultancy Services for “Technical Review, Financial Analysis and Preparation of Bid Documents of projects under NGRBA for Kanpur District- I & Allahabad District- A and District- C sewerage system” in November 2011.
CONSULTING ENGINEERS LIMITED PROJECT DETAILS Sub Project Area – (TCE prepared DPRs/Tenders) 11 wards of District-I in Kanpur Sewerage District –C in Allahabad (including STP) TCE provided handholding services, day to day interaction and technical support at Kanpur and Allahabad to UPJN for DPR /Tenders- Balance 23 wards of District-I in Kanpur Sewerage District -A in Allahabad
CONSULTING ENGINEERS LIMITED PROJECT DETAILS Kanpur is the biggest city of the State of Uttar Pradesh and is main centre of commercial and industrial activities. Kanpur city population lakhs (2011). It is administratively divided into 6 zones and 110 wards. As per Master Plan report, Kanpur city is divided into four sewerage districts from I to IV. In District-I, about 70% area is sewered and remaining 30% is un- sewered. Area is km 2 and has 34 wards. In unsewered area, local residents have own arrangement with septic tanks and the effluent is discharged into nearby drains/nala which finally discharged into river Ganga. District-I have 25 wards in old city (inner old area) and 9 wards in north- east area and is situated on right bank of river Ganga which is mainly residential area & famous for commercial centre and reputed institutes.
CONSULTING ENGINEERS LIMITED KANPUR SEWERAGE MAP KEY MAP OF SEWERAGE DISTRICTS IN KANPUR DIST-II DIST-I DIST-III DIST-IV
CONSULTING ENGINEERS LIMITED POPULATION AND FLOWS Description Sewerage District – I, 11 wards – Sub Project Area Population (2011) 2.36 lacs Design population (2050) 3.06 lacs Design Flows MLD Area covered 397 hectare Sewerage District Census Population (2011) Projected Population (2020) Projected Population (2050) Sewage Flows 2020 (MLD) Sewage Flows 2050 (MLD) I9,04,28012,11,85021,65, Kanpur City:
CONSULTING ENGINEERS LIMITED PROJECT LOCATION – SUB PROJECT AREA SEWER NETWORK IN PROJECT AREA, KANPUR (DISTRICT- I)
CONSULTING ENGINEERS LIMITED CONTOUR LEVELS OF SUB PROJECT AREA Terrain Variation of 11 Wards in Sub Project Area, Kanpur
CONSULTING ENGINEERS LIMITED PROJECT DETAILS – SUB PROJECT AREA 11 wards of District –I are having narrow streets and busy and congested area. 106km of existing sewers. Most of the existing sewers are RCC Pipes. Large sized sewers are of Brick Masonry egg shaped sewer. Sewage from 11 wards is proposed to be connected to trunk sewers located along the Mall Road (Parade-Bada chauraha-Phool Bagh road) and leading to Jajmau STP. Old trunk sewer (1000 mm dia) and another new trunk sewer (1000mm- 1200mm-1400mm dia) along Mall Road. Due to already defined invert levels of existing trunk sewers, the efforts made for connecting sewers of 11 wards by gravity to existing trunk sewers. Sewer network was optimized using software with minimum pumping station and avoiding deep excavation. Hydraulic design of sewers is done using SewerCAD software.
CONSULTING ENGINEERS LIMITED PROJECT DETAILS Sewage Pumping Station has been proposed near Chacha Nehru Hospital to avoid the deep sewer excavations in downstream area. There is a local depression in Patkapur area, where ground levels are in the range of to m compared to surrounding ground levels of m. Lift Station is proposed to pump sewage to nearby outfall. For utilisation of existing sewers in project area, extensive survey and data collection was carried out in the field to assess the condition of sewers. Interacted with ULBs for required information such as sewer collapse, choking, overflow, etc. and verified existing alignment at site and its connectivity.
CONSULTING ENGINEERS LIMITED SURVEY OF EXISTING SEWERS Physical survey was done for obtaining details of existing sewers. The sewer condition (including manholes) were observed physically by opening manholes.
CONSULTING ENGINEERS LIMITED PROJECT HIGHLIGHTS Existing sewers which were in good condition and laid within past years, are utilized in overall planning and designing for next 30 years horizon. Silted sewers which are in good condition are proposed to be used after desilting. Heavily silted sewers are being discarded. Sewers of 400mm dia. and above sizes are proposed for internal lining by rehabilitation techniques. GRP slip lining for egg-shaped sewers Polyurea coating for circular sewers Trenchless technology for laying of new sewers in busy road crossings and speedy execution At narrow streets, the use of HDPE pipes and pre-cast RCC manholes is proposed to speed up the work.
CONSULTING ENGINEERS LIMITED LINING OF EXISTING SEWERS AND PIPE JACKING A – Existing sewers after desilting B - Installing Liner C - Rehabilitated Sewer after grouting D – Cross section of Rehabilitated Sewer LAYING OF PIPE USING TRENCHLESS TECHNOLOGY ALIGNMENT CHECKING WITH LASER PIPE JACKING
CONSULTING ENGINEERS LIMITED PROJECT HIGHLIGHTS During execution stage, Contractor shall first have to carry out detailed condition assessment survey for sewers and obtain concurrence regarding their utilization from the Department. Egg-shaped brick sewers are proposed to be rehabilitated with GRP segment pipes. For this, the Contractor will require to carry out CCTV survey, submit the assessment report and provide GRP segment lining for identified stretches. Similarly, for circular sewers the Contractor will require to carry out CCTV Survey, submit the assessment report and provide polyurea coating for identified stretches. Wherever, existing sewers are to be replaced by new sewers, the existing system will continue to operate by sequential construction program and temporary pumping so as to minimize the inconvenience to users.
CONSULTING ENGINEERS LIMITED MULTIPLE HOUSE CONNECTIONS WITH SINGLE ROAD-SIDE CHAMBER DESILTING, PRECAST MANHOLES AND MULTIPLE HOUSE CONNECTIONS PRE CAST CONCRETE MANHOLE METHODOLOGY FOR DESILTING
CONSULTING ENGINEERS LIMITED PROPOSED SYSTEM DescriptionKanpur City (Sewerage District – I, 11 wards) Design Year2050 Design population 3.06 lacs Area covered 397 hectare Sewer Network – Proposed Length - 62 km (RCC NP3 / HDPE PE-100 PN 6.0) Sizes – 150 to 700mm dia. Sewage Pumping Station – Proposed -One SPS (peak flow capacity: 9.26 MLD) -One Lift Station (peak flow capacity: 2.14 MLD) Rehabilitation of existing sewers -De-silting of existing sewers- 17 km (sizes– 150 to 200mm dia.) -Rehabilitation of existing circular and egg shaped sewers- 3 km Circular sewers sizes– 400 to 900mm dia. Egg shaped sewers sizes – 18’’ x 27’’ / 20’’ x 30’’
CONSULTING ENGINEERS LIMITED PROJECT HIGHLIGHTS Prequalification and Tender documents are prepared as the World Bank guidelines. Prepared project level procurement plan and detailed capital cost for the project. Undertaken detailed financial viability analysis. Prepared financial models for service provider in Allahabad and Kanpur for sub project area and also a Framework for Financial Modeling which can be applied in later stages of the project. Project Economic analysis which included computation of Internal Rate of Return and economic benefits by establishing baseline terms of the amount of pollution in the river and characteristics of the effluents.
CONSULTING ENGINEERS LIMITED PROJECT BENEFITS With proposed sewerage system, Prevention of Pollution of River Ganga. Public inconvenience and traffic interruption will be minimized. Resource conservation by reducing the requirement for procurement of new pipes. Construction time will be reduced by around 6 months by avoiding major pipe trench excavation & laying work and procurement of new pipes. Better environment and hygienic condition. Uplift the social standards of residents and human dignity. Avoiding the chances of damage to foundation of nearby structure. UPJN Kanpur DPR for remaining 23 wards (of length about 400km) is prepared on similar approach.
CONSULTING ENGINEERS LIMITED PROJECT COST Sl. No. ComponentsProject Cost (Rs. In Crores) 1 Sewerage System in 11 wards of District-I in Kanpur Sewerage System in Balance 23 wards of District-I in Kanpur Sewerage system in District –C in Allahabad Sewerage system in District –A in Allahabad MLD STP in District –C in Allahabad42.24 Total Project Cost951.17
CONSULTING ENGINEERS LIMITED CURRENT STATUS OF PROJECT The project has been approved by NGRBA in Empowered Steering Committee meeting in 2014 for implementation.