Bhupen Hazarika Setu, also known as the Dhola-Sadiya Bridge in eastern Assam, as India's longest bridge.

1. Bhupen Hazarika Setu
India’s longest bridge
presented by:
Ratul Das
Civil eng. Dept, Tezpur university

2. Introduction
 on 26th March, 2017 Prime Minister NarendraModi inaugurated the Dhola-
Sadiya Bridge over the Lohit river- a tributary of Brahmaputra.
 It is the longest bridge in India and it will improve road connectivity
between Assam and Arunachal Pradesh.
 The project was constructed as part of a public-private partnership.
 The project cost around ₹10 billion (US$140 million) and construction took
over five years to complete. It is 3.55 kilometres (2.21 mi) longer than
the Bandra Worli Sea Link in Mumbai, making it the longest bridge in
India.

3. Location

4. Location
 It is located over Lohit
river
 In Assam, the bridge is
located in sadiya and its
other end is in Dhola

5. Purpose of construction
 Regional connectivity
 For military purpose

6. General information of the bridge
 Total length – 9.15km
 Width – 12.9m
 Longest span – 50m
 No. of spans – 183
 Number of segment – 2745
 Nubmer of segment per span – 15

7.  Total no of piles (1700mm dia) – 324
 Total no of piles (1500mm dia) – 412
 Total no of pier and pier caps – 184
 Construction start – Novmember 2011
 Construction end – 10 march 2017

8. Type of bridges

9. Type of bridge
Beam bridge Dhola sadiya bridge

10. Advantages of beam bridge
 It does not take long to build a beam bridge
 Beam bridges are useful in almost any location
 You can use multiple types of material to build a beam bridge
 There are multiple design options available for this bridge
 The cost of a beam bridge is minimal for most communities

11. Disadvantages of beam Bridge
 Span limitations exist for beam bridges
 Beam bridges can sometimes start to sag as they age
 Beam bridges can go through a significant amount of wear-
and-tear in their lifetime
 Beam bridges do not offer a lot of flexibility
 The width of the deck span is limited with a beam bridge

12. Challenges in construction
 Seismic force
 flood
 Large space

13. Material
 Steel – 30,000 tonnes
 Cement – 17,000 tonnes
 Thermo-mechanically treated bar of strength 500mpa

14. Loading on Bridge
Dead load
Super - imposed dead load
Live traffic
Wind
Temperature

15. Structure
 The structure has been designed as per IRC codes 112 and 6
 the bridge is divided into two: A proper river portion and
floodplains
 There are a total of 183 spans - 101 over the floodplains and
82 in the river portion
 324 piles in river portion are of 1,700-mm diameter, while the
412 in the floodplains are 1,500 mm

16. Structure
 The vertical load on the piles in the river portion came to 520
tonne
 The piles were load-tested for 1,300 tonne
 Concrete of strength 40 MPa was used for the piles, while
steel reinforcements for the pile had a strength of 500 Mpa
 The post-tensioned concrete has a strength of 50 MPa while
the high-tensile steel strands have a tensile strength of 1,860
MPa

17. Construction
 The main components of a bridge are the foundation, substructure, and the
superstructure

18. Foundation
 Pile foundation

19. Method of construct pile

20. Dimension of piles

21. Sub structure

22. Super structure
 The superstructure is of segmental box type

23. Method of Segmental
construction
 Casting of Precast segments in casting yard.
 Transporting the precast segments at the site.
 Erection of the precast segment using launcher or crane.
 External Prestressing.
 Grouting.

24. Casting of segment
Two method used for casting of segments
1. short line method
2. Long line method
Transfer the segment – After casting or curing
of segments are transferred at erection site with the help of
traveler or crane.

25. Erection of segments
1. Balance cantilever erection
2. Progressive Placement erection
3. Span by span erection
4. Incremental launching erection

26. External prestressing
 Pre-tension method
 Post tension method

27. Grouting
 The main purpose of grouting is to protect the all strands
against corrosion and develop the bond between prestressing
steel and surrounding concrete.

28. Abutments