construction of bridges

1. PRESENTATION ON
Bridge construction Techniques
Shivraj Karape
(16211205)

2. • A bridge is a structure providing passage over an
obstacle without closing the way beneath. The required
passage may be for a road, a railway, pedestrians, a
canal or a pipeline. The obstacle to be crossed may be a
river, a road, railway or a valley.

3.  Superstructure or Decking
 Bearings
 Substructure
 Piers and Abutments
 Foundation

4. According to the flexibility of superstructure
1. Fixed span bridges
2. Movable span bridges

5. Fig.-: Movable span bridges
b)a)
Fig.-: Fixed span bridges

6.  According to the form or type of superstructure
1. Slab
2. Girder
3. Truss
4. Arch
5. Suspension
6. Cable stayed
 According to the materials of construction
1. Cement concrete
2. Pre-stressed concrete
3. Steel
4. Masonry

7. 1. Movable – bascule bridges
2. Movable – swing bridges

9. 1. Temporary Bridges
2. Military Bridges
3. Permanent Bridges
According to the function
1. Road
2. Railway
3. Pipeline

10.  A foundation is the part constructed under the pier/abutment
and over the underlying soil or rock.
 The loads transmitted by the foundation to the underling soil
must not cause soil shear failure or damaging settlement of
the superstructure.
• Purpose of foundation is to distribute the load of bridge over a
large bearing area and provide stability of bridge against
settlement and tilting.

11.  Shallow Foundation
Spread Foundation and Raft foundation
 Deep Foundation
Pile, caisson and well Foundation

12. Box Caisson
• Box caisson is as like a box that is opened on topside and other
sides are closed.

13.  Open caisson is as like well
that is opened on top and
bottom ends.
 Bottom edges are made sharp.
 During digging and sinking
the inside material is taken
out.
 Open caissons are used in soft
soil and in high water level.

18. PRECAST SEGMENTAL ERECTION TECHNIQUES
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