utility surveying
Post on 20-Jan-2022
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Utility Surveying
Tommy NG
What is Utility Surveying?
… the process of identifying and labeling public utility mains that are underground. Utility Surveying includes lines for telecommunication, electricity distribution, natural gas, cable television, fiber optics, traffic lights, street lights, storm drains, water mains, and waste water pipes.
This profession strives to provide solutions that help to solve a range of underground utility problems at different stages, from (1) initial systems and design, then (2) intermediate surveying and construction, and (3) long term monitoring and maintenance, data, operational and asset management.
… they can be divided to two major types ... for the layout of new systems and for locating existing systems … both above or below ground.
What is Utility Surveying?
Utility Survey(Alignment and Level)
Condition Survey(Condition of Utility)
Utility Information Management
(Information System)
Underground Inspection(e.g. Void/ leakage)
Utility Asset Management(Long-term Maintenance)
Things to be Considered for Utility Surveying
Underground/ Above Ground
Nature of Survey
Things to be Considered for Utility Surveying
Legal Requirement
Occupation
(License by LandsD)
OperationExcavation
(XP by HyD/LandsD)
Cap. 406 / Electricity Ordinance
Cap. 51 / Gas Safety Ordinance
Cap. 102 / Waterworks Ordinance
Cap. 106 / Telecom. Ordinance
Cap. 28
Land (Miscellaneous Provisions)
Ordinance
Occupation of
unleased land
Control of excavations
in unleased landProtection
Measures
Things to be Considered for Utility Surveying
TechnicalSpecifications and
Requirements
Things to be Considered for Utility Surveying
Data Specifications and Requirements
Equipment for Utility Surveying
Pipe Cable Locator(Electromagnetic Properties of
Electric Current)
Ground Penetration Radar(Detect Reflection of Microwave Band
Signal)
Equipment for Utility Surveying
CCTV Inspection(Video Inspection)
Leak Noise Detector(Correlation of Soundwave)
Total Station/ Laser Scanner
Things you must know…
- Basic understanding on different utility surveying equipment
- Survey procedures for PCL and GPR
- Data handling procedure of GPR
- Basic working principles of different equipment
- Control and management of excavation works in HK
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