Handbook for Bridge Inspections - TSP2

9.1 ELEMENTS IN THE GROUND
Example9.1-1
Subsidence or the infill behind the abutment pi er
has caused a difference in height of27 mm in the
road surface. The bridge is situated on a main road
and subject to a lot ofhcavy traffi c. The gap has
resulted in noise pollution for those li ving in the
vicinity of the bridge. The damage has affected
both traffic safety and the environment.
Type of Damage:
Degree of Damage &
Consequences:
Cause of Damage:
101 Subsidence
3T,3M
61 Traffic Loads
Procedures:
Fill with asphalt within I year.
Example 9.1-2
Severe subsidence of the bark infi ll with a resultant
large difference in height between the bridge and
the inti I\, The damage is to be considered as dangerous
for traffic, and the subsidence has also affected
Ihe appearance of the wall underneath the bridge.
The di splacement of the columns indicates that the
pressure exerted by the earth has cause additional,
great strai n on them.
Type of Damage:
Degree of Damage &
Consequences:
Cause of Damage:
of Materials
101 Subsidence
3T,2M
II Incorrect Choi ce
Procedures: Replacement of the material with, for
example, EPS. The condition of the columns must
be carefully checked after removal of the old material.
Example 9.1-3
Subsidence o f the earth under a small part of a
wing-wall. This can affect load bearing capacity
should the subsidence develop.
Type of Damage:
Degree of Damage &
Consequences:
Cause of Damage:
101 Subsidence
2C
9 Other/Unknown
Procedures:
5 years.
Fill with appropri ate material within