Handbook for Bridge Inspections - TSP2
Handbook for Bridge Inspections - TSP2
Handbook for Bridge Inspections - TSP2
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9.1 ELEMENTS IN THE GROUND<br />
Example 9.1-12<br />
As a result of erosion some of the concrete blocks<br />
on the front of an abutment pier have started to sl ip.<br />
Settlement and holes have appeared in the infill<br />
behind the abutment pier which in turn has an effect<br />
on traffic safety.<br />
Type of Damage: 103<br />
Scouring/erosion of river course<br />
Degree of Damage &<br />
Conseq uences:<br />
4T<br />
Cause of Damage: 38<br />
Faul ty Construction<br />
Procedures: Temporarily repair by immediately<br />
infilling with material and later permanently by<br />
installing a relief plate against the back wall.<br />
Example 9.1-13<br />
A small amount of erosion under an abutment pier<br />
due to lack of attention being paid during the planning<br />
phase to the draining away ofwaler.<br />
Type of Damage: 103<br />
Scouring/erosion of rive r course<br />
Degree of Damage &<br />
Consequences:<br />
1M<br />
Cause of Damage: 13<br />
Poor design solutions<br />
Procedures: None<br />
Example 9.1-14<br />
Erosion has started under an abutmenl pier because<br />
insufficient attention has been paid during the construction<br />
phase to draining water from the roadway.<br />
Ma intenance costs may be affected if the erosion is<br />
allowed to develop.<br />
Type of Damage: 103<br />
Scouring/erosion of river course<br />
Degree of Damage &<br />
Consequences:<br />
2M<br />
Cause of Damage: 38<br />
Faulty Construction<br />
Procedures: Replacement of ballast materials,<br />
improvements to the drainage system and protection<br />
against surface erosion. To be carried oul within<br />
5 years.
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