Well Foundation

ACKNOWLEDGEMENTAll praises to ALMIGHTY with the help of whom I have been able to complete this project successfully and hope that the same will prove beneficial to the society. Words like real thinks are depicted but have their own handicaps. They shall never be able to pierce through the gamut of emotions that are suddenly laid bare and are suddenly exposed during the routine of life. They shall never be able to describe the spirit of cooperation with which we worked nor shall they never be able to express the feelings I feel towards my guide.

My project was a struggle that was made more difficult due to numerous reasons. It was the guidance of H.O.D Er. Firdoce Ahmad Itoo and Er. Sajad Ahmad Khan they saw me through all those odds for which I am greatly indebted.

Successful completion of this minor project work would have been possible by the cooperation and the guidance I got from my guide. I feel it pertinent to add a few words for his cool mind and patience and always bearing a charming smile which definitely provided me encouragement and enthusiasm and lively atmosphere at all times.

I take this opportunity to offer special thanks to my guide who guides me and providing all sorts of help for collecting data at site.

CONTENTS:-

CHAPTER 1:- INTRODUCTION AND NECESSITY

CHAPTER 2:- SALIENT FEATURES

CHAPTER 3:- WELL FOUNDATION

CHAPTER 4:- SUB-STRUCTURE

CHAPTER 5:- DRAWING DETAILS

CHAPTER 6:- PHOTOGRAPHS

CHAPTER 7:- PROGRESS WORK

CHAPTER 1:-

INTRODUCTION AND NECESSITY

PROJECT SITE:-

DOODH GANGA FLOOD SPILL CHANNEL COMBINED BRIDGE NO BR 12/1

INRTRODUCTION:-

The Jammu & Kashmir govt. intends to construct an integrated long span bridge at Tengpora Bypass Srinagar. The govt. proposes to provide the safe and comfortable journey to people of valley as well as people coming from other parts of world. This project is assigned by R & B sub-division 2nd and is taken up for construction by Multitech company. The bridge is double lanned, the length of bridge between centre to centre of left and right abutments is 306.14 meters. The foundation used for the construction of this bridge is well foundation. There are two number of wells under abutments of diameter 9.15 m and a total depth of 32.156 m including steining and curbs, seven number of wells under piers of total height of 23.50 m and diameter of 9.150 m. Each Abutment has a height of 2.80 m and diameter of 1.2 m, piers having total depth of 7.706 m and diameter of 3.2 m.

The bridge is designed for a snow load as per clause 224 of IRC : 6 – 2000. In the design, maximum accumulation of snow of 25 cm has been considered for wheel loads and 50 cm accumulations of snow for track loads. Incase, the accumulation of snow is more, immediate measures may be deicing so that movement of traffic may be permitted. Moreover, the footpath is designed for a live load of 5 KN/m2 and is constructed on right side of the bridge while going from left abutment to right abutment. This footpath is constructed with a width of 1.5 m over whole length of bridge and on the other end of bridge anti crash barrier of height 1.115 m is constructed.

Since, the bridge is located in an area where temperature reaches near freezing point therefore all necessary measures specified in clause 1712.1 of morsth specifications for road and bridge work ( 4th revision )

shall be taken while carrying out work of concreting in cold weather conditions.

NECESSITY:-The central government is primarily responsible for development and maintenance of national highways. These are very important as even though these comprise only 2% of road network but are carrying about 40% of total road traffic. The prime focus on developing roads of uninterrupted flow of traffic with enhanced safety features including better riding surface, better road geometry, better traffic management, divided carriageways, grade separators, over bridges, underpasses, bypass and wayside amenities.

There is an existing bridge on the opposite side of proposed bridge with a carriageway of 7.55 m. Due to heavy movement of vehicular traffic, it will become very difficult in future to withstand these live loads. So, the J & K govt. intends to construct an integrated long span bridge with a carriageway of 9 m’s so that the loads on existing bridge will be minimized. There is no footpath on the existing bridge which is creating lot of problems to people while crossing the bridge. For this purpose, the proposed bridge is provided with a footpath of width 1.5 m over the whole length of bridge on right side. On the other side of bridge an anti crush barrier of height 1.115 m is provided for the safety purpose.

CHAPTER 2:-

SALIENT FEATURES OF THIS BRIDGE

PROJECT SITE:-

DOODH GANGA FLOOD SPILL CHANNEL COMBINED BRIDGE NO BR 12/1

SALIENT FEATURES:-1. The name of the project is Doodh Ganga Flood Spill

Channel Combined Bridge No. BR 12/1.2. The project is located at Tengpora Bypass ,Srinagar.3. The total estimated cost of this project is Rs 15 Crore.4. The Bridge is long span type with total distance between

centre to centre of left and right abutment is 306.14m.5. The Carriageway of the bridge is 9 metres.6. The type of constrction is R.C.C.7. The Foundation used is Well Foundation.8. The Wells are nine in number .The two wells are under

abutments and remaining seven are under piers.9. The Dimensions of wells under abutments :-

Total depth = 32.156m Diameter = 9.15m Width of Steining = 1.6m Width of Soil filling/water filling/intermediate

plug = 5.8m Depth of intermediate plug = 0.5m Depth of sand filling = 7.856m Depth of water filling = 20.620m Depth of curb = 2.88m Depth of cutting edge = 3.18m Width of cutting edge = 9m

10. The Dimensions of wells under piers :- Total depth = 23.50m Diameter = 9.15m Width of Steining =1.40m Width of Soil filling/water filling/intermediate

plug = 6.20m Depth of intermediate plug = 0.5m Depth of sand filling = 16.608m Depth of water filling =3.572m Depth of curb = 2.520m Depth of cutting edge = 2.820m Width of cutting edge =9m

11. The Dimensions of Abutment:- Total depth = 2.85m Diameter of Abutment = 1.2m Depth of shaft cap =0 .4+0.4 = 0.8m

12. The Dimensions of Piers:- Depth = 7.706m Diameter of Pier = 3.2m Depth of Pier cap = 1.6m

13. The Height of Anti – Crushed Barrier = 1.115m14. The thickness of Deck Slab =0.2m15. The Footpath is provided on right side of bridge from

left to right abutment. The Width of footpath is 1.5m16. The width of Sofit Slab = 6m

17. For maintenance purpose, a pair of jacks are provided over pier cap.

18. One end of girder is fixed and other is free.19. The Transverse seismic stoppers are provided to stop

transverse movements of the girder and longitudinal seismic stoppers are provided to stop longitudinal movements.

20. Grade of concrete used for steining is M-35 and that of cutting edge is M-25.

21. 65mm thick wering coat consist of under layer of mastic asphalt 15mm thick and two layers of asphaltic concrete 25mm each as per mosrth specification section 500.

22. The Expansion gap of 50 mm is provided for the Bridge.

CHAPTER 3:-

TYPE OF FOUNDATION USED ( WELL FOUNDATION)

PROJECT SITE:-

DOODH GANGA FLOOD SPILL CHANNEL COMBINED BRIDGE NO BR 12/1

WELL FOUNDATION:-The foundation at Doodh Ganga Flood Spill Channel Combined Bridge No. BR 12/1 is Well Foundation,the total depth of wells under each abutment including steining and curb is 32.156m with a diameter of 9.150m and depth of cutting edge is 3.180m.

However,the total number of wells under piers are seven with a dapth of 23.50m including steining and curbs with same diameter as that of abutment wells.

TECHNICAL DETAILS:-A. Loads transmitted by bridge deck onto the abutments are:-

Vertical loads from self weight of deck. Vertical loads from live loading conditions. Horizontal loads from temperature,creep movements and wind. Horizontal loads from braking and skidding effects of vehicles.

B. Loads transmitted by bridge deck onto the piers:- Vertical loads from self weight of deck. Vertical loads from live loading conditions. Horizontal loads from temperature,creep movements and wind. Rotations due to deflection of bridge deck.

C. Load effects to be considered on the rear of walls:-

Earth pressures from backfill material. Surcharge from live loading or compacting plant. Hydraulic loads from saturated soil conditions.

CHAPTER 4:-

SUB - STRUCTURE

PROJECT SITE:-

DOODH GANGA FLOOD SPILL CHANNEL COMBINED BRIDGE NO BR 12/1

SUB-STRUCTURE:-

The sub-structure of the bridge consists of following components;

1. Foundation :- The foundation used for the construction this bridge is well foundation. There are nine number of wells two of them are under abutments and remaining seven are under piers. The wells under abutments are having a total depth of 32.156 m and well cap is having a total depth of 2 m, the diameter of well and pier is same, as 9.150 m. The wells under piers are having a total depth of 23.50 m and well cap is having a depth, same as that in well caps under abutments and also the diameter of wells under piers is also same as that under abutments.

2. Abutments:- There is an abutment on either side of the bridge, both of them are laid. The abutments are of following dimensions;Total depth of abutment - 2.850 mDiameter of abutment - 1.20 mTotal depth of abutment cap - 0.4 + 0.4 =0.8 m

3. Pier:- There are seven number of piers in between two abutments but one of them is not constructed remaining six are completely laid. The piers are of following dimensions;Total depth of pier – 7.706 mDiameter of pier – 3.2 mTotal depth of pier cop - 0.8 + 0.8 = 1.60 m

CHAPTER 5:-

DRAWING DETAILS

PROJECT SITE:-

DOODH GANGA FLOOD SPILL CHANNEL COMBINED BRIDGE NO BR 12/1

CHAPTER 6:-

PHOTOGRAPHS

PROJECT SITE:-

DOODH GANGA FLOOD SPILL CHANNEL COMBINED BRIDGE NO BR 12/1

WELL FOUNDATION

BRIDGE UNDER CONSTRUCTION

DECK SLAB

PIER & PIER CAP

CHAPTER 7:-

PROGRESS WORK

PROJECT SITE:-

DOODH GANGA FLOOD SPILL CHANNEL COMBINED BRIDGE NO BR 12/1

PROGRESS REPORT OF CONSTRUCTION:-

S.NO. NAME OF WORK NO. PROGRESS01. Wells under Abutments 2 Laid02. Abutments 2 Laid03. Shaft caps 2 Laid04. Wells under piers 7 Laid05. Piers 6 Laid06. Pier 1 Not

Constructed07. Pier caps 6 Laid08. Well caps 8 Laid09. Well cap 1 Not

Constructed10. Girderbetween R/A and P7 1 Laid11. Girder 7 Not

Constructed12. Girder between P7 & P6 1 Under progess