Precast Concrete Arches

Design, Construction and Customised Geotechnical Applications

Antonio Ramirez and Charles Parkes

Precast concrete arches are emerging as a preferred geotechnical solution in major infrastructure projects across Australia, particularly within roadways, railways, and the mining sector. These geotechnical structures, meticulously engineered for robustness and durability, provide an efficient and cost-effective alternative for bridge underpasses, overpasses, culverts, and tunnels. This presentation explores geotechnical applications, benefits, design methodologies and construction of precast concrete arches, highlighting their significance in geotechnical engineering and infrastructure development throughout customised applications.

The fundamental principles of arch construction have been utilised for thousands of years, with their effectiveness recognised since the Roman Empire. While materials and construction methodologies have evolved significantly, the core concept remains unchanged. Modern innovations in the field of precast arch systems, build upon these principles, offer a streamlined and sustainable approach to infrastructure development.

Precast arches are designed using F.E.M. analysis and funicular curve theory. Arches are optimised for load conditions, requiring minimal materials while delivering maximum durability. These precast arch units are engineered to fit clearance box dimensions precisely, ensuring rapid and predictable installation. Unlike traditional methods of creating a buried pathway such as precast culverts with constrained dimensions or bridge structures with various components such as bearings, joints, falsework, scaffolding, or post-tensioning, arched covers can be built with fit for purpose dimensions or reduced construction complexities and long-term maintenance requirements.

Precast concrete arches represent a forward-thinking approach to infrastructure development, blending time-tested engineering principles with modern technology to create efficient, durable, and cost-effective solutions. As the demand for sustainable and resilient infrastructure continues to grow, precast concrete arches play a pivotal role in shaping the future of geotechnical construction methods in Australia and beyond.

Customised applications will include the following (with reference to real case studies):

Antonio Ramirez Geoquest R&D and Engineering Manager for Australia and NZ

With nearly 25 years of expertise in soil retention and precast solutions, Antonio’s journey with Geoquest began in Spain, where he dedicated 12 years to research, development and design. Specialising in the design and manufacturing of Geoquest products in Europe, Antonio’s move to Australia in 2011 marked a transition to a pivotal role within Geoquest’s Design Team. His contributions span diverse infrastructure projects, including roads, railways, and mining structures nationwide. Antonio holds a master’s degree in civil engineering from The Polytechnic University of Madrid, member of the AGS, Fellow member of Engineers Australia and Executive Chartered. He stays in the loop of the latest developments in the field and actively contributes to industry standards as a member of technical committees.

Charles Parkes Geoquest Design Engineer

Charles is a Chartered Civil Engineer with eight years of experience as a design engineer at GeoQuest Australia. He holds a master’s degree in civil engineering from the University of Technology, Sydney. Specializing in soil retention structures and precast concrete solutions, he focuses on developing efficient and sustainable engineering designs. His expertise includes integrating advanced design methodologies to enhance structural performance and project efficiency. He is passionate about pushing the boundaries of geotechnical and structural design to address evolving industry challenges.

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