Certification of Permanent Prestressed Ground Anchors & Reinforced Fill

Products

Terence C.F. ChanChief Geotechnical Engineer/Geotechnical Projects

GEO, CEDD

Certification of PermanentPrestressed Ground Anchors

Excavation Support for Lantau Airport Railway Tunnel (20m deep)

Excavation Support for Sports StadiumSouth China Athletic Association (17m deep)

Tsing Yi, Anchored Slope

Environment, Transport and Works Bureau Technical Circular No. 16/2004“The Use of Permanent Prestressed Ground Anchors in Government Projects”

Anchor Certification System

•ensures consistent and satisfactorystandards in the provision of groundanchors• saves time for designers andcontractors by eliminating repetitivechecking of the design of componentsand assembly details

GEOSPEC 1“Model Specification for Prestressed Ground Anchors

Certificate Issued by CEDD

Certification of Permanent Reinforced Fill Products

Reinforced Fill Slope

Grid Reinforcement

Strip Reinforcement

40m High Concrete Panel Wall at North West Tsing Yi

Concrete Panel Wall

16m High Concrete Block Wallat Discovery Bay

Concrete Block Wall

Environment, Transport & Works Bureau Technical Circular No. 24/2003“Permanent Reinforced Fill Structures and Slopes”

Certification of Products

• Only apply to polymeric reinforcingproducts (tensile strength & stress-strain characteristics are temperatureand/or time dependent)

• Ensure safe design tensile strength• Ensure adequate quality assurance• Elimination of repetitive checking

Polymeric Reinforcement

Ribbed polyolefincasing

Polyester orpolyaramid bands

Woven or knitted polyestergrid or grid formed by welding/knitting individual strips/bars

Drawn polymer sheet containing holes

Strips/bars

GEOGUIDE 6“Guide to Reinforced Fill Structures and Slope Design”

Assessment

• Durability• Creep and stress rupture• Construction damage• Fill-to-reinforcement interaction

Certificate issued by CEDD

Thank You