Handbook for Bridge Inspections - TSP2

9.1 ELEMENTS IN THE GROUND
Example 9.1-9
Under-scouring of foundations on vertical piles
because of insufficient protection agai nst erosion.
Vertical, but not horizontal loads can be accommodated,
whilst the piles can be subjected to unforeseen
sources of impact. The consequences for the bridge's
carrying capacity arc serious.
Type of Damage: 103
Scouring/erosion of river course
Degree of Damage &
Consequences:
4C
Cause of Damage: 12
Erroneus calculat ions
Procedures: Infi lling with concrete under the foundati
ons, replenishing with su itable matcrials and
installing protection against erosion. This shou ld be
carried out within 6 months.
Example 9.1-10
Erosion of the embankment caused by the water
from the pavement not being drained off as planned.
If the situation is allowed to continue at the present
rate of development, maintenance costs will be
affected. Since a lot of public transport passes under
the bridge, the damage is also of consequence fo r its
appearance.
Type of Damage:
Scouring/erosion of river course
Degree of Damage &
Consequences:
Cause of Damage:
Construction fau lt
103
3M,3E
38
Procedures: Infill ing with suitable materials,
improvements to the drainage system and installati ­
on of protecti on against erosion. To be carried oul
during the year in question.
Example 9.1-11
A combination of erosion of the in fi ll behind the
wing-walls and inadequate anchoring of the elements
has resulted in the displacement of the fac ing
slabs at the top edge of the bridge. Consequently
there is a risk of them falling onto the pathway
below the bri dge.
Type of Damage: 103
Scouring/erosion of river course
Degree of Damage &
Consequences:
4T
Cause of Damage: 38
Faulty Construction
Procedures: The elements should be righted and
made safe within 6 months.