MALVIYA NATIONAL INSTITUTE OF TECHNOLOGYJAIPUR
TRAINING REPORT ON
CONSTRUCTION OF FLYOVER AT TRANSPORT NAGAR CIRCLE (JAIPUR)
About JDAJaipur Development Authority (JDA) has been committed to working for the benefit of the citizens of Jaipur with planned implementation of development schemes and is consistently striving to take Jaipur at higher levels of progress. Jaipur is one of the most well-planned cities of its times and planned development has always been central to its ideology. Jaipur Development Authority came into existence by the Government of Rajasthan with a vision to combat and manoeuvre
the growing requirements of a large city in wake of the increasing population and to help give Jaipur a planned look compatible and comparable to any metropolitan city of repute. JDA was authorised powers and a green signal to speed up the development and progressive growth of the entire city to rapidly change the face of Jaipur. To meet these important needs JDA sprang into action and started to understand the necessary needs of the city. According to the requisites, JDA has been working towards timebound construction, creation and development of the western part of Jaipur based on major scientific and hi-tech strategies. Thus, Jaipur has been beautified intensively to augment the tourist attraction in the city and to raise the living standards to suit convenience of its citizens. The major undertaking of JDA includes the following: * Infrastructural development of Jaipur region by construction of flyovers, bridges, parking places. * Development of commercial projects and residential schemes, etc. * Development of basic amenities like community centres, parks, ring roads. * Development and rehabilitation of kacchi bastis etc. * Preparation and implementation of master plan. * Preparation and implementation of guidelines for colonisation. * Environmental development by planning and implementing roadside plantations and by developing eco-friendly schemes. * Development of rural area around Jaipur. * Development of transport facilities like Mass Rapid * Transport System (MRTS), Transport Nagar, and major sector roads.
According to the promises and commitments of the Rajasthan Government, JDA has been time and again proving itself as a pioneer of development, creating a state-of-the-art city of substance. JDA has been working on widening all main roads, construction of over bridges, under bridges and flyovers to regulate the traffic on roads, minimize pollution, and ensure public convenience and safety. JDA firmly believes in bridging the gap and reaching out to its citizens and to provide them with quick and hassle-free service.
Contents 1. Introduction 2. Components of flyover i) ii) Foundation Piers and abutments
iii) Deck iv) Pre-stressed concrete v)3.
Backfill and Reinforced earth wall
Underpass and Construction of Diaphragm wall
Construction of Flyover at Transport Nagar Circle(Jaipur)INTRODUCTION Transport Nagar Chouraha is one of the gateways to Jaipur on junction of NH-8 (From Delhi) and NH-11 (From Agra). With the view to ease out the traffic congestion at this important junction , after evaluating various options JDA has undertaken construction of three level grade separator at the crossing. The proposal is to construct underpass towards MI Road- Agra side and flyover from Delhi side with one leg flying towards MI Road (Flyover-1) and other towards Jawahar Nagar Bypass road (Flyover-2) along with slip lanes on all the four sides. The other instruments of junction improvement along with improvement of drainage system of the area as well as for new constructed elements are part of the project. Some of the elements like Diaphragm wall, for construction of underpass, will be constructed for the first time in Jaipur and perhaps Rajasthan. The administrative & financial sanction amounting to Rs. 71.25 Crore has been approved for the project. M/s Span Consultants have been engaged as the consultants for the Project. The Proof check of the structural design is being done by Structural Department of Malaviya National Institute of Technology, Jaipur. M/s Petron Supreme (JV) have been awarded work order amounting to Rs. 64.98 Crores for the project with stipulated period of completion as 24 months. The work actually commenced in the month of June.09. Presently , the work of all the three components namely Flyover-1, Flyover-2 and underpass is going on in full swing. All the piers (17 Nos.) of Flyover-1 have been completed and placing of PSC Girders has
commenced. In Flyover-2, 17 out of 19 piers have been completed. The work of retaining wall (Diaphragm wall) is also continuing in satisfactory pace. Presently, works amounting to Rs. 16.00 Crores have been completed. The Flyover-1 from Delhi Road towards MI Road is scheduled to be completed by Sept. 10. The Flyover-2 from Delhi towards Jawahar Nagar Bypass is scheduled for completion in Dec.10. The project will be concluded with construction of Underpass towards MI Road-Agra direction by June 2011.
Salient Features Project Cost Agency Consultant Delhi Date of commencement Stipulated date of completion : Rs 67.67 Crores : Petron Supreme (JV) : Span Consultant Pvt Ltd., : 03.10.2008 : 02.10.2010
Physical Features1. 2. 3. 4. 5. 6. 7. 8. Total Length of the Flyover Total Length of Underpass Vertical Clearance of Underpass Width of Underpass Width of Flyover Nos. of Viaduct Length of Viaduct 565.20 m 365.00 m 5.50 m 19.90 m 20.50 m 1+10 Nos 46.70 / 21.20 m
Length of both side approaches of 305.0 m
Flyover 9. Type of Structure (Flyover) Box Girder in Obligatory
Span/Precast PSC Girders with RCC slab on remaining spans 10 Type of Structure (Underpass) Diaphragm wall with Precast PSC Girders and RCC solid slab
5. SOURCE OF MATERIAL: S.No. Material 1. 2. 3. 4. 5. Stone aggregates Coarse Sand Cement Bitumen Source Delhi Road River Banas Any ISI Marked regular brand OPC / PPC Mathura Refinery
Selected fill for R.E River Dund bed Wall
Any Original Manufacturer confirming to relevant IS Code
Fosroc , Choksey or equivalent
SOME IMPORTANT THINGS!!!
1) Always wear a good quality helmet on the site.
2) Always wear shoes on the site.
3) Wear safety belts if required.
4) Safety nets should be provided wherever it is necessary.
MAJOR COMPONENTS OF FLYOVER FOUNDATION Since the bridge has to carry a big live load and its dead weight is also very large so we cannot go for simple foundation but pile foundation. Pile foundation is one type of deep foundation. It is used where the good soil is at higher depth (10 or 15m) or soil having low bearing capacity. Pile is also used for tall structures. In pile foundation the load coming from the super structure is taken by pile cap and equally distributed in no of piles, pile transfers this load into the soil. At Transport Nagar Flyover Pile foundation is proposed for piers and abutment. The piles are 1200 mm dia , 20 m depth M-35 grade cast in situ piles. The pile cap is proposed of M-35 grade. Detailed arrangement of pile is shown in attached Bottom Plan (Courtsey:Span Consultants)
INSTALLATION PROCEDURE OF PILES Step 1 --- Excavation of Pile Shaft The bored pile equipment set including hydraulic oscillator, hydraulic vibrator, hammer grab and rock chisel used in this project is very common and being widely used for shaft excavation. a. Set out the correct position of the bored pile on site. b. Excavate about 3 - 4m of the pile to remove shallow obstructions and then backfill, wherever necessary. c. Install the bottom section of temporary casing of required diameter into the ground by oscillating and jacking or by
vibrating motion exerted by the oscillator and the vibrator respectively. d. Set up hydraulic oscillator or vibrator in conjunction with a crawler crane. e. Excavate within the casing by hammer grab and redrive the steel casing simultaneously by using the heavy duty casing oscillator / vibrator. Rock chisel in various types will be employed for removal of obstruction or hard materials during the above process. f. Extend the steel casing by bolting or welding on additional casing during the excavation. g. Water will be pumped into the casing during excavation and constant water head will be maintained so as to prevent any ingress of material from the bottom of casing. h. Verticality of the casing will be monitored by means of spirit level from time to time. i. Continue the above procedure until the founding level of pile has been reached .j.
Pile base enlargement will be formed by employing a bellout chisel or a reverse-circulation drill as indicated in the working drawings.
Step 2 --- Cleaning of Pile Shaft Final cleaning will be carried out by the air-fitting method using high pressure air compressors. The slime and muddy water within the casing will be cleared and delivered into a desilting tank before discharge. Step 3 --- Tremie Concreting
a. The pile shaft will be concreted by "Underwater Tremie Technique". The tremie pipe sections will be inserted and be jointed until it reaches the bottom of pile shaft. Concrete will be poured into the tremie pipe by using a concrete skip. Concreting will be carried out in one continuous operation until the required level has been reached. b. As concreting proceeds, the level of the concrete relative to the ground level will be monitored by measuring with weighted tape after each skip of concrete is placed. c. The base of the tremie pipe will be kept with a minimum depth of approximate 1 to 2m below the surface of the concrete. d. The temporary casing will be extracted simultaneously by the oscillator in the course of concreting. A head is always maintained between the top of conc