The research and development for this new technology consist of following steps:
Conceptual design and development:
Technical feasibility and performance of this technology have been completed through analytical studies at the early stage of development.
Numerical analysis and design:
The system response has been studied through several finite element analyses simulating the pipe response under different combinations of sizes, operating conditions and back-fill properties.
Laboratory testing:
Laboratory test series on the cross sectional and global responses were completed on 4-1/2 inch steel pipes at the University of Alberta. Several cross-sectional tests have been completed on the lateral stiffness of the elements and their interaction with pipe and soil with different arrangements.
Total of four full scaled tests also completed to evaluate the compressive capacity of the system. The results of both test series completely validated the principal idea behind the technology and proved the exceptionally high performance of the system. The system responses were completely in agreement with the analytical and numerical studies.
Prototype design and verification:
Prototypes for this technology were developed and successfully verified via several tests under simulated field conditions of ground movements with different angles with respect to pipe axis. All the prototype verification test were completed in collaboration with the University of Alberta at the I. F. Morrison Structural Laboratory and CFER Technologies lab for small and full-scale tests, respectively.
Field test:
Two full-scale field tests will be performed on 8-5/8 inch pipes under operating conditions at the Evergreen Learning and Innovation Centre.