SCOTS Road Asset Management Structures Maintenance Treatments

jumpclaybrainedUrban and Civil

Nov 25, 2013 (3 years and 4 months ago)

42 views


SCOTS Road Asset Management

Structures Maintenance Treatments




exp

| consul ti ng



Version 1.2

Page
1

of
5



Maintenance Activities

Table
4.6



副畴楮攠M慩湴敮e湣攠A捴楶楴i敳⁦潲⁓瑲畣瑵r敳



Structure/sub
-
structure component
type

Maintenance Activity

Maintenance
Interval

Piers, abutments,
wing
-
walls, retaining
walls, reinforced
earth walls and crib
walls

Remove vegetation affecting the structure,
clear debris from bearing shelves, rod outlet
pipes & weep pipes and remove silt & debris,
repair gap sealant to movement joints, check
pedestrian

protection measures.


Columns

Remove debris and bird droppings


Steel beams, girders,
trusses, concrete
beams, and fascias

Remove debris and bird droppings from
flanges, clear drainage holes for box sections.


Expansion joints

Clean out debris and
vegetation (water
jetting where appropriate), clear drainage
systems, check, tighten & replace any
loose/missing nuts and bolts, replace where
appropriate.


Metal parapets

Check and tighten where necessary any
loose nuts and bolts. Replace where
necessary
.


Clear hollow section drain holes.

Repair mortar fillets to parapet base plate
beddings as required.

Masonry and
concrete parapets

Remove any vegetation


Bearings
(elastomeric, sliding
& roller)

Remove general dirt & debris and check
condition.


Subways Security

Check and clean security mirrors and other
pedestrian measures


Rivers & Streams

Remove any vegetation and debris from
within and without the structure, where visible.


Remove any silt build
-
up which is restricting
flow through the
culvert.

Repair gap sealant to movement joints.


SCOTS Road Asset Management

Structures Maintenance Treatments




exp

| consul ti ng



Version 1.2

Page
2

of
5



Structure/sub
-
structure component
type

Maintenance Activity

Maintenance
Interval

Sign gantries

Tighten holding down bolts where necessary.


General

Remove loose materials which may be used
as missiles


Check whether special finishes are
satisfactory

Any additional action that

may be
specifically noted in the Structural Manual for
the Structure

Removal of Graffiti

Offensive or racist graffiti on structures is
removed or painted over




SCOTS Road Asset Management

Structures Maintenance Treatments




exp

| consul ti ng



Version 1.2

Page
3

of
5



Table
3.7 below details a number of planned maintenance (or ‘Steady State’) renewal and
replacement activities undertaken on the structures asset with their relative merits and
expected programme intervals. There are also a number of periodic maintenance activities
if the material has been found to have deteriorated between inspection periods

such as
major repointing.


Table
3.7


P污湮敤⁍e楮瑥湡湣攠A捴楶楴i敳⁦潲⁓瑲畣瑵r敳


Description of
Maintenance
Activity or
Treatment Type

Current
Regime
(Expected Life
or treatment
frequency

Works History

(How is work recorded)

Lifecycle Impacts

(On
the assets whole life
cycle and or other
maintenance
activities

NB

Refer to section
??

on Performance
Management

Major Repainting

Protection of
steelwork to
prevent corrosion.



years

All works records are
kept on file

Work is required to
prevent steelwork
from corroding.

Patch repainting to
be implemented

As required

All works records are
kept on file

Work is required as
temporary measures
before major
repainting

Waterproofing

Replacement of
waterproofing to
bridge decks.



years

All works records are
kept on file

Work required to keep
out water and
chloride, which can
cause corrosion of
reinforcement.

Expansion joints

Replacement of
expansion joints in
bridge decks.

Span length <20m

Span length >20m

Sealing of joints





Years


years

As required

All works records are
kept on file

Work required to
ensure that there is no
restriction
to
movements in the
bridge deck
.



Required to keep out
water and chloride,
which can cause
corrosion of
reinforcement


SCOTS Road Asset Management

Structures Maintenance Treatments




exp

| consul ti ng



Version 1.2

Page
4

of
5



Description of
Maintenance
Activity or
Treatment Type

Current
Regime
(Expected Life
or treatment
frequency

Works History

(How is work recorded)

Lifecycle Impacts

(On
the assets whole life
cycle and or other
maintenance
activities

NB

Refer to section
??

on Performance
Management

Bearings
Replacement
of
bridge bearings.
Aim is to ensure that
bridge decks
continue to
expand/contract
safely.

As required

All works records are
kept on file

Work required to
ensure no inbuilt stress
within the bridge deck
occurs

Bearings

Where appropriate,
clean slidin
g and
roller bearings if
accessible and re
grease.

As required

All works records are
kept on file

Work required to
ensure no inbuilt stress
within the bridge deck
occurs

Impregnation
Concrete
impregnation to
prevent chloride
entry (BD43).







years

All works records are
kept on file

Required to ensure
that salt laden water
does not penetrate
into the concrete and
corrode the steel bars

Replace aluminium
parapets



years

All works records are
kept on file

Ensures that parapets
can withstand any
modern impacts
safely.

Major repainting of
steel parapets

As required

Measures are kept in
file

To ensure that
steelwork does not
corrode.

Replace steel
parapets


years

All works records are
kept on file

Ensures that parapets
are capable of
withstanding modern
impact loads


SCOTS Road Asset Management

Structures Maintenance Treatments




exp

| consul ti ng



Version 1.2

Page
5

of
5



Description of
Maintenance
Activity or
Treatment Type

Current
Regime
(Expected Life
or treatment
frequency

Works History

(How is work recorded)

Lifecycle Impacts

(On
the assets whole life
cycle and or other
maintenance
activities

NB

Refer to section
??

on Performance
Management

Concrete Repairs



Measures are kept in
file

Prevents any spalls
falling onto passer bys,
and to prevent further
corrosion on the steel
bars.

Major
brickwork/masonry
pointing and repairs


All works records are
kept on file

Ensures the full life of
the structure is
maintained

Other work

Other maintenance
not shown above
e.g. sheet piling,
listed structures etc..


All works records are
kept on file

Ensures the full life of
the structure is

maintained