Yong Fang

1. Pile Verification and Certifications

• Geotechnical Certification of Pile Foundations: We provide on-site inspection and certification of pile foundations by an experienced RPEQ Geotechnical Assessor. This includes verifying that ground conditions align with design assumptions, and the factored geotechnical strength meets or exceeds design loads .The Geotechnical Assessor considers information available, certifies compliance with drawings, and records the as-built information of the pile foundation according to the requirements by the design and specifications.
• Test Drilling and Supplemental Investigations: Where borelogs are insufficient or piles have high ultimate loads (e.g., over 5000 kN), we can supervise and assess test drilling of the pile base to confirm strata strength and absence of serious defects. We utilize a range of tools, including review of original geotechnical investigation cores and reports, analysis of samples obtained during the excavation of the socket.
• Dynamic and Integrity Testing Oversight: We can oversee and supervise low strain or non-destructive integrity tests on cast-in-place piles to ensure their integrity, conducted by a company independent of the piling contractor. For driven piles, we can verify High Strain Dynamic Testing (HSDT/PDA) and CAPWAP analyses, noting their use for mobilized axial capacity, load-settlement characteristics, and pile integrity estimates.
• As-Constructed Documentation Review and submission: We review and certify as-constructed records for each pile, including the base height of both the liner and pile, socket and base assessment certified by the Geotechnical Assessor (with site records, excavation logs, photos, in-situ testing), tremie pouring records, and concrete test results.

2. Ground Anchor and Soil Nail Verification and Certification

• Construction Procedure Compliance: We assess and verify the contractor's detailed construction procedures for soil nailing and rock bolting/dowelling/Anchor, covering drilling, installation, grouting, stressing (for active bolts), and testing methods, ensuring all necessary approvals from the Administrator are obtained prior to commencement.
• Proof Testing and Acceptance: We supervise and oversee acceptance testing for soil nails and passive rock dowels. This verifies that project-specific deflection limits are met. For active rock bolts, we can verify similar load testing.
• Corrosion Protection System Verification: For permanent anchors (rock bolts), we perform production testing on a sample of installed bolts to inspect the integrity and thickness of cement grout cover, location and spacing of cracks, and degree of grout filling inside and outside the sheath/sleeve, ensuring the anchor is fully encapsulated and free of defects affecting service life. We also verify that proof testing to the serviceability load is carried out on a percentage of rock anchors.
• Design Assumption Validation: We review design reports for soil nailed walls and ground anchors, ensuring they include geological and geotechnical models, design strength parameters, pore water pressure conditions, calculations, construction staging, and proposed monitoring programs. We can verify that additional rock anchors are included for long-term durability monitoring/testing.

3. Earthwork Inspection and Slope Risk Assessment

• Construction Phase Verification: During earthworks, we undertake visual inspections of slope materials and monitor water/movement to verify design assumptions. We review conditions and data progressively, advising on necessary modifications to cut slope design, subsurface drainage requirements, and construction sequencing.
• Foundation Excavation Inspection: For load-bearing footings, we provide inspection and approval of the trimmed, dewatered foundation surface by a Contractor's RPEQ geotechnical engineer prior to covering, confirming groundwater profile, strength, and stiffness comply with design assumptions.
• Geotechnical Risk Assessment: We undertake or review geotechnical risk assessments for cut slopes and embankments based on preliminary analyses, identifying potential issues impacting performance standards. This assessment considers long-term stability conditions, which are generally critical for cut slopes and excavations.
• Remediation Design Assessment: For remediation works on existing slopes and embankments, we can assess and advise on site conditions, aligning with TMR Geotechnical Section's discretion and using consequence classes defined in relevant guides.

4. Retaining Structure Inspection and Assessment

• Design Compliance Verification: We inspect and assess various retaining wall types, including reinforced concrete cantilever walls, embedded walls, soil nailed walls, Reinforced Soil Structure (RSS) walls, gabion walls, and boulder walls, ensuring their design conforms to relevant Australian Standards, and TMR Technical Specifications.
• Foundation and Material Verification: We verify that retaining walls are founded on competent material, with appropriate geotechnical investigations informing bearing capacity, global stability, and settlement estimates. We ensure construction procedures for excavations, material replacement, and compaction are followed to achieve designed foundation capacity.
• Construction Quality Assurance: We perform regular site inspections during construction to ensure compliance with construction drawings and specifications, including proper placement and compaction of reinforced fill material for RSS walls. This includes verifying material traceability from source to the wall.
• Certification of Construction: Upon completion, we provide or review certification from the Contractor's RPEQ Civil Engineer confirming that the retaining structure has been constructed per design specifications and meets all design requirements, including foundation bearing. This certification also covers as-constructed drawings and adherence to structural integrity and serviceability criteria.
• Durability and Performance Assessment: We evaluate aspects related to durability, such as minimum shotcrete thickness and concrete strength for soil nail walls and ensure filter and drainage materials conform to MRTS03 requirements to manage hydrostatic pressures.

• Pacific Motorway M1 upgrade – Palm Beach to Tugun, QLD
• Indooroopilly Roundabout upgrade, QLD
• Bruce Highway (Brisbane – Gympie), Caboolture – Bribie Island Road to Steve Irwin Way upgrade, QLD
• Coomera Connect – Shipper Drive to Helensvale Road, Coomera, QLD
• Hope Island Station – New Gold Coast Station Beenleigh to Varsity Lakes, Coomera, QLD
• Hexham Straight Widening – Ironbark Creek Crossing, Newcastle, NSW
• Fitzroy to Gladstone Pipeline – Shafts for pipe jacking, Rockhampton, QLD

• Westgate Tunnel Project Northern Tunnel, Melbourne
• Peak Downs Highway Project in Nebo, Mackay, QLD
• Crown Sydney Hotel Resort, NSW
• Pacific Highway Upgrade – Nambucca Heads to Urunga
• Barrams Road Bridge, Ripley, Brisbane, QLD
• Barangaroo Foreshore Piling Works, Sydney
• Brisbane Legacy Way Project
• Newcastle NCIG Coal Terminal Dump Station
• Airport Link, Brisbane, QLD

• Managed and completed more than 10 major piling/foundations and retaining wall projects on/ahead and within budget, for main infrastructure work and landmark commercial/residential project. The projects included the foundation of 57-storey Sands Marina Bay Integrated Resort
• 4 underground metro train (MRT) stations and overpass interchange bridge in Singapore
• Multi-basement of high-rise building in KL Malaysia
• A challenging retaining wall at a Carport wharf in Indonesia.

• 26 piling and other foundation projects including major underground metro train (MRT) stations, Tuas viaduct to Malaysia and various buildings and road works.

• 5 wharf projects in China, from the foundation to completion