This document summarizes the construction of a flyover connecting three roads in Patna, Bihar, India. It describes the project details including the total length of the elevated structure and flyover, number of lanes and arms. It then outlines the sequence of construction including piling, substructure work, and launching of segments. It provides photos from the construction site showing pile foundations, pile caps, pier reinforcement, and curing of piers. It also discusses material and quality control tests including concrete strength and pile load tests. Safety measures on site such as barricading and safety equipment for workers are highlighted.

1. Submitted by
RANDHIR KUMAR (1503050)
Under the guidance of
Er. Rakesh Kumar
(Project engineer BRPNNL Patna)
Training undertaken at
Bihar Rajya Pul Nirman Nigam Limited Patna
25-05-2018 to 05-07-2018
DEPARTMENT OF CIVIL ENGINEERING
NATIONAL INSTITUTE OF TECHNOLOGY PATNA

2. Content
 Project title
 Flyover and its components
 Project details & layout
 Sequence of construction
 Pile foundation
 Substructure construction
 Material and quality control
 Tests on site
 Safety
 References

3. Project Title
“Construction of flyover Connecting Mithapur flyover to
Bhikhari Thakur flyover via R-Block junction with
elevated rotary”.
 Client-
Bihar Rajya Pul Nirman Nigam Ltd. Patna
 Contractor-
Rachna Construction Co. Bharuch, Gujrat

4. Flyover
“A bridge over another road for allowing cross traffic
without interruption with its approaches on both sides is
commonly called as Flyover”

5. Flyover components

6. Project details
 ELEVAYED STRUCTURE LENGTH : 1262.653 m
 Total Flyover Length : 1748.763 m
 Span : 54 Spans
 No. Of Lanes : 4 (2x7.5 m)
ARM NOMENCLATURE DETAILS AS PER SITE
LOCATION :
 ARM-01 : From GPO to R-block junction (628.62m)
 ARM-02 : From Bhikhari Thakur Bridge to R-block
junction(464.106 m)
 ARM-03 : From Miller High School to R-block (490.498m)
 Rotary Junction : Over R- Block Junction (124.109 m)
 Merging Point : Two Lane merging in Bhikhari Thakur
Bridge(41.43m)

7. Layout plan (autocad)

8. Sequence of construction
 Surveying
 Analysis and design of the structure
 Piling and Pile cap Construction
 Construction of Pier shaft and Pier cap
 Construction of Pedestal
 Launching and gluing of segments
 Construction of road over bridge

9. Construction of Pile foundation
Steps involved in bored in-situ piling
 Setting out exact position of pile on the ground using
surveying equipments.
 Drilling with the help of boring auger.
 Provide temporary metal casing with depth 3-6m.
 Provide reinforcement cage.
 With the help of tremie pipe, concreting is done.
 Before concrete gets harden, casing is removed.
 Removal of top 1m of pile with the help of jack
hammer.

10. Pile foundation on site

11. Pile cap on site

12. SUB STRUCTURE WORK ON SITE
 Types of sub structure : Single Solid Pier
 Shape of sub structure : Rectangular and Circular
 Grade of concrete : M-50
Total Nos. Of Pier : 74
 a. In ARM -01 : 17 (Rectangular)
 b. In ARM -02 : 16 (Rectangular)
 c. In ARM -03 : 09 (Rectangular)
 d. In Rotary : 14 (Rectangular)
 e. In Merging Portion : 18 (Circular)
Total Nos. Of Pier Cap & Portal Cap : 58
 In ARM -01 : 17
 In ARM -02 : 14
 In ARM -03 : 10
 In Rotary : 08
 In Merging Portion : 09

13. Pier reinforcement on site

14. MATERIAL AND QUALITY CONTROL
Concrete material
 Pile M 35
 PCC M 15
 Pile cape M 40
 Pier shaft M 50
Clear cover to the reinforcement shall be
 Pile cape - 75mm
 Pile - 75mm
 Pier - 50/75mm
STEEL- TMT bar (Fe 500D)

15. MATERIAL AND QUALITY CONTROL
Lap length
 Pile = 54d
 Pile cape = 51d
( for bottom and side face reinforcement)
=78d (for top face reinforcement)
 Pier = 44d
d- Diameter of smaller bar being lapped

16. MATERIAL AND QUALITY CONTROL
Quality of Concrete
 workability and strength
 compaction of concrete
 curing
Steel
 Reinforcement as per drawing and BBS, diameter and
length of bar, spacing of bar, lap
 length, binding of bar, development length, coupler,
clear cover.

17. Curing of pier

18. Tests
 Workability - Slump cone test
 Compressive strength- Compressive Strength of concrete is
defined as the Characteristic strength of 150mm size concrete cubes
tested at 28 days. Sample is collected before casting and sent to lab for
testing. Sample is kept in same environment and same curing at site for
28 days then they are checked at lab.
 Pile load test- Routine test is done as per IS 2911 (part 4):1985. It
is carried out on a working pile with a view to check whether pile is
capable of taking the working load assigned to it.
Maximum allowable settlement is 12 mm.

19. Pile load test

20. Safety
“Safety first” Every construction work is done with this
line keeping in mind. Safety of
 people should be the first priority of any construction
work.
 Helmet, jacket and shoes for all employs and worker.
 Barricading, Instruction board, light, reflector, safety
cone, flag.
 safety belt is used if any worker is at height more than
2m from ground.

21. Barricading and instruction board

22. References
 IS 456:2000, Code of practice for plain and reinforced concrete,
Bureau of Indian Standards, New Delhi.
 IS 2911 (Part 1/Sec 2):2010, Design and construction of pile
foundations-code of practice (bored cast in-situ concrete piles),
Bureau of Indian Standards, New Delhi.
 IS 2911 (part 4):1985, Codes of practice for design and
construction of pile foundations – load test on piles, Bureau of
Indian Standards, New Delhi.
 IS 14893:2001, Non-destructive integrity testing of piles (NDT) –
Guidelines, Bureau of Indian Standards, New Delhi.
 IS 3558:1983, Code of practice for use of immersion vibrators for
consolidating concrete, Bureau of Indian Standards, New Delhi.
 IRC SP 90:2010, Manual for grade separators & elevated
structures, Indian Roads Congress, New Delhi.
 Google map, www.gmap.com

23. THANK YOU