Handbook for Bridge Inspections - TSP2

is discovered in the grouting cement then all joints shou ld be
checked. New cement grouting of the same type should be
app lied to the joints once these have been thoroughly cleaned.
• Check for sagging in the cast anchorage cones. This can be iden
tified by the presence o f leaked casting material along the cable
at the entrance to the cable head.
Anchorage o f Ca bles
• Some cable anchorages have been constructed in such a way
that the cable head and parts of the cable have been cast in con
crete. This concrete should be removed in order to release the
cable up to the anchor head for inspection.
Figure6.5-2: Cable Heads imbedded ill COllcrete
• Cables/stays slink into weak soi l: an assessment should be made
as to whether a partial excavation should be undertaken to deter
mine their condition. However, excavation work must not in any
way weaken the rivet holders for the gravitat ional anchorage
points.
Suspension Rod Clamps
• Movement. The suspension rods should be checked for out-of-l
line movement; check also whether the suspension rod plates
have moved in such a way that the suspension rods are touching
or rubbing against the cables.
• Movement. Sagging can arise around the cable suspension rods
between the cables and the cable cap. The cast metal can be
extruded as thin flakes in the joint between the cap and the
cable.
• Deformed bolts, clamps etc.
• Cracked or broken bolts, clamps etc.
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Handbook for Bridge Inspections