Download GEOLOGY IN BRIDGE CONSTRUCTION

GEOLOGY IN BRIDGE
CONSTRUCTION
1
PARUL INSTITUTE OF ENGG.& TECH.
VADODARA
PREPARED BY:
•
MANOHAR BISHNOI
SHUBHAM KORAT
MAULIK KALATHIYA
NIKUNJ KATHARIYA
DHARMESH LIMBASIYA
•
130370106075
130370106065
130370106059
130370106061
130370106070
•
DEPARTMENT: CIVIL
•
BE 3RD SEM
•
2
CONTENT:
• Definition.
• Geological considerations.
• Geological charactersa) Depth to bed rock .
b) Nature of bed rock .
c) Structural disposition.
• Advantages.
• conclusion.
3
DEFINITION:
• A structure built over a river, a dry valley, low or any
depressed part of the land to provide a link between
two opposite sides.
4
GEOLOGICAL CONSIDERATIONS :
• Whenever the bridge is constructed across any natural depression,
the sound rock should not be at a large depth below the walls and
floor of such a depression .
• Foundation and abutment rocks should be strong enough to bear
the load of the bridge structure as well as the vehicular traffic above
it.
• If the bridge lies across the river channel, the erosive action of the
running water should not be so conspicuous as to cause the wear
and tear of the piers or foundation.
• Foundation rock should be free from shear zones, fissures and joints.
5
GEOLOGICAL CONSIDERATIONS :
• Most rocks of igneous origin are suitable
for bridge foundation.
• Amongst sedimentary rocks, compact
beds of sandstone are suitable for taking
the load of the bridge structure and traffic.
6
GEOLOGICAL CHARACTERS:
• In any major bridge construction project, the
designer sharply place the Bridge Abutments
and piers on as sound strong and stable rock
foundation below as possible.
a) Depth to bed rock .
b) Nature of bed rock .
c) Structural disposition.
7
DEPTH TO BED ROCK :
• Unconsolidated natural deposits of sand gravels and
boulders.
• Such loose materials are not safe for foundation.
• Reasons –
1.Piers placed directly on them would be unstable.
2. The cover material is liable to be removed due
scouring by river water.
8
NATURE OF BED ROCK:
• Most igneous, massive
sedimentary and metamorphic
rocks are quite strong, stable
and durable.
9
STRUCTURAL DISPOSITION:
• Horizontal altitude and
uniform massive structure
offer inherent resistant
against failure.
10
ADVANTAGES :
• The subsurface soil description, including unit weight,
relative density, moisture content parameters and modeling
recommendations for each layer of soil.
• The presence of permafrost, high ground water table, and
soil stability considerations.
• The role in socio-economic development and defense
strategies.
11
CONCLUSION :
• From all the point of
view geology in bridge
construction have more
importance. As it is the
necessary part of the
construction.
12
REFERENCE:
• www.geologybridgconstruction.in
• www.encyclopedia.com
• www.googleinfo.com
• www.stripthecity.in
13
THANK YOU
14