Highway Slope Manual
Highway Slope Manual
Highway Slope Manual
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72<br />
overseeing the maintenance of the slopes. The purpose of the integrated review is to examine<br />
all relevant records together to provide insightful information for making decisions on whether<br />
additional maintenance works or other actions are required to be carried out (Figure 8.1).<br />
Records of routine<br />
maintenance inspections<br />
of slopes, slope drainage<br />
and other slope works<br />
Records of routine<br />
maintenance inspections<br />
of associated road<br />
drainage<br />
Records of regular<br />
monitoring of Special<br />
Measures (e.g.<br />
prestressed ground<br />
anchors and horizontal<br />
drains)<br />
Records of regular checks<br />
of water-carrying services<br />
Records of routine<br />
maintenance works,<br />
preventive maintenance<br />
works and urgent repair<br />
works<br />
Landslide inspection<br />
records, where available<br />
Review of all records<br />
of slope maintenance<br />
inspections and works<br />
pertinent to a slope or<br />
a package of slopes in<br />
the same road section<br />
by the responsible<br />
professional<br />
engineer<br />
Decisions to be Made<br />
• The need to call for an<br />
out-of-turn Engineer Inspection.<br />
• The need to arrange more<br />
frequent inspections or checks,<br />
additional routine maintenance<br />
works, preventive maintenance<br />
works or urgent repair works.<br />
• The need to strengthen specific<br />
aspects of maintenance in the<br />
subsequent inspections.<br />
Notes: (1) Routine maintenance inspections of the slopes, slope drainage and other slope works and any<br />
associated road drainage should preferably be carried out by the same maintenance team.<br />
(2) For routine maintenance inspections and works on the same road section that are carried out by other<br />
parties, the owner should arrange to obtain where possible the inspection and works records from the<br />
relevant parties for the integrated review by the responsible professional engineer.<br />
Figure 8.1 Co-ordinated Approach to <strong>Highway</strong> <strong>Slope</strong> Maintenance<br />
Adequate and safe access should be provided to highway slopes for carrying out<br />
maintenance inspections and maintenance works. Such access should be extended to cover<br />
areas beyond the boundary of the slope where necessary (e.g. for inspection of any works on<br />
the natural slope beyond the crest of the man-made slope for which the maintenance<br />
responsibility has been assigned to the road owner). The access arrangement and design<br />
should ensure safety of the inspection and maintenance personnel and avoid disruption to the<br />
traffic, especially where access has to be made from a busy road. Where possible, a road<br />
shoulder or lay-by to facilitate safe access should be incorporated in the design of new roads<br />
and improvement of existing roads. For existing slopes, the adequacy of access for carrying<br />
out maintenance inspections should be reviewed as part of the Engineer Inspections and<br />
recommendations on any improvements necessary should be made.<br />
The volume of soil/rock debris found during routine maintenance inspections along the
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