Industry-leading expertise in grouting, ground treatment, structural waterproofing, and rock breaking—delivering complex underground solutions across Australia and major international infrastructure projects.
Grouting & Foundation Works Australia (GFWAust) tackles the most complex ground challenges. Whilst located in NSW, we have worked all over Australia—successfully completing jobs in NT, SA, VIC, QLD, and NSW.
In association with David Lees & Associates (DL&A)—formed in 1999—we provide expert engineering consultancy. Our expertise covers Project Management (Tanahu HPP, Rishikesh–Karanprayag Railway, Mahaweli Water Security Investment Program), Design Management (Delhi Metro, Brisbane North South Bypass), Blasting Consultancy (Parramatta Rail Link, North Side Storage Tunnel), Site Supervision (Singapore Deep Tunnel Sewer System), and acting as an Expert Witness in hydrogeological cases, demolition, and rock breaking arbitrations.
Precision underground techniques for groundwater control, ground improvement, structural longevity, and safe excavation—backed by decades of field delivery.
Controlling groundwater and strengthening subterranean structures through precision rock grouting.
Improvement of soft ground via permeation grouting and sand stabilization techniques.
Complete waterproofing of structural concrete essential for longevity and safety.
Conventional and non-explosive rock breaking using PCF (Penetrating Cone Fracture) technology.
Expert design management and blasting consultancy for major civil and mining projects.
Site representation, technical supervision, and expert witness services on major infrastructure systems.
Metro, rail links, cable tunnels, and deep underground transport corridors.
Hydropower, storage facilities, desalination, and major water security schemes.
Shafts, collieries, tailings, and underground mining ground treatment.
Basement waterproofing and structural ground improvement for urban projects.
Gas infrastructure, mini hydro, and specialised underground energy works.
Controlled rock breaking, slope stabilisation, and blasting consultancy.
From Sydney motorways to Himalayan hydropower—selected assignments that define our technical reputation.
Additional sectors: Buildings (Maroubra structural improvement), Mining (Kestrel Mine, West Wyalong Shaft), Pipelines (Kogan North gas), and specialised Blasting (Eastern Creek stabilisation). Also: Mahaweli Water Security Investment Program, Sri Lanka.
Review ground conditions, project constraints, and risk—drawing on decades of site experience.
Tailor techniques—from permeation and rock grouting to PCF rock breaking—to the geology and programme.
Deliver with disciplined site supervision, quality control, and proven field methods.
Confirm performance, document outcomes, and support handover or expert opinion where required.
With over 40 years of global expertise in mining and underground excavation, David is renowned for developing unique, tailored grouting techniques—including compensation grouting, permeation grouting, and soil mixing—for complex projects. He remains actively involved in the industry as Editor of the Australasian Tunnelling Society (ATS) Journal.
Whether you need specialist grouting, design consultancy, site supervision, or expert opinion—reach out and we'll respond promptly.