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APPENDIX:
MODEL BRIEF FOR ENGINEER INSPECTIONS FOR MAINTENANCE
1. Objectives
The objectives of the Assignment are :
(a) to assess the state of maintenance and condition of the slope/retaining wall*,
(b) to establish whether a Stability Assessment of the slope/retaining wall* has
previously been carried out and, if so, to carry out a review of the previous Stability
Assessment,
(c) to determine whether an immediate Stability Assessment is necessary, and
(d) to recommend/ and arrange, supervise and certify the satisfactory completion of any
necessary works*.
The review of previous Stability Assessment required in (b) above is not intended to certify or endorse any part or the whole of the previous Stability Assessment. It only aims to identify whether the previous Stability Assessment contains any obvious deficiencies in engineering approach or assumptions in the light of current local geotechnical engineering practice and safety standards, and to judge whether the stability of the slope/retaining wall would be affected by any visible changes identified during the site inspection.
2. Scope The Engineer shall carry out the following tasks for slope/retaining wall* number________________
#, the location and extent of which are shown on the attached plan :
(a)
determine whether a Stability Assessment of the slope/retaining
wall* has previously been carried out by reviewing available
documentary information and if so, review the previous
Stability Assessment reports to check whether the engineering
approach used, the assumptions and the conclusions made in these
reports are reasonable in the light of current practice and
safety standards, and advise the Employer accordingly, (b) identify all visible changes including landslides that have taken place at or in the
vicinity of the slope/retaining wall*, in particular changes since the previous Stability
Assessment if this has been carried out, which could have implications on its
stability, and to judge whether these might be significant, (c) re-assess the consequence-to-life category of the slope/retaining wall*, as set out in
Table 5.2 of the Geotechnical Manual for Slope (1984) or the latest revision of the
Table promulgated by the Geotechnical Engineering Office, (d) check that the Routine Maintenance Inspections have been carried out and
documented satisfactorily, (e) assess the adequacy of routine maintenance works, and supplement the list of
basic maintenance works items, as necessary, (f) re-assess the required frequency of Routine Maintenance Inspections, Engineer
Inspections for Maintenance, and regular checks of buried water-carrying
services, (g) look for and consider the implications of problems that are not explicitly included in
the basic maintenance list, and bring to the attention of the Employer any
immediate and obvious danger noted and, if necessary, recommend emergency
repair works or detailed investigations, (h) identify the presence of buried water-carrying services on or in the vicinity of the slope/retaining wall* (including relevant areas outside the lot boundary), check for signs of leakage of the services and recommend immediate detailed leakage
check, regular checks, repair, re-routing of the services as necessary,
(i) check that the regular checks of buried water-carrying services and/or Regular
Monitoring of Special Measures (if required) have been carried out and documented
satisfactorily, (j) provide a record of Engineer Inspection for Maintenance that includes advice on
whether an immediate Stability Assessment of the slope/retaining wall* is
necessary, and recommendations on the necessary preventive maintenance works,
and (k) prepare/update* the Maintenance Manual to include, inter
alia, all relevant information extracted from the previous Stability Assessment, and the desk study
and site inspection(s) under this Assignment.
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Part 2 - Management of Maintenance Works* |
(l) obtain or arrange to obtain all statutory approvals or official endorsements, as appropriate, required for the execution of the necessary maintenance works, and
(m) arrange, supervise and certify satisfactory completion of the maintenance works.
3. Deliverables The Engineer shall submit_________________ # copies of the Record of Engineer Inspection for Maintenance /and__________________ # copies of the Maintenance Manual* to the Employer.
4.
Programme of Implementation The due date for the commencement of the Assignment shall be_____________________ #. The due date for the completion of Part 1 of the Assignment, including the submission of Record of Engineer Inspection for Maintenance and any relevant documents and reports, shall be________ #, working to a programme agreed with the Employer within__________ # weeks of the commencement of the Assignment.
5. Standards and Specifications The Engineer shall adopt Geoguide 5 : Guide to Slope Maintenance (1998) and the Geotechnical Manual for Slopes (1984), and such technical and design standards and specifications as are applicable to and in current use by the Government of the Hong Kong Special Administrative Region or, if non-existent, international Codes of Practice and Specifications.
6. Information Provided by the Employer All the available information held by the Employer and relevant to the Assignment will be provided to the Engineer.
Notes:
(1) # denotes blank to be filled in as appropriate.
(2) * denotes item to be deleted if not applicable.
(3) The agreement should be priced on the basis of the tasks included in Part 1 of Section 2 only. The fee for the
tasks in Part 2 of Section 2, if found necessary, should be negotiated separately.
(4) The programme for the tasks in Part 2 of Section 2 should be agreed after completion of Part 1 of the work. References :
GCO (1984). Geotechnical Manual for Slopes. (Second edition). Geotechnical Control Office, Hong Kong, 295 p.
GEO (1998). Guide to Slope Maintenance
(Geoguide 5). (Second edition). Geotechnical Engineering Office, Hong Kong, 91 p.
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