Time-Dependent Effects On Vertical Shafts Used In Micro-Tunneling applications In Queenston Shale

Micro-tunneling technique is considered a feasible means to construct pipelines and tunnels in different types of ground including Queenston shale. However, this shale exhibits time-dependent deformation behavior, generally known as the rock swelling which produces additional stresses on underground structures. These stresses may exceed the allowable tensile or compressive strength of concrete of the pipeline or the tunnel liner, which in-turn may result in
cracks in these structures.

Rehabilitation of Concrete Pipes Using Honeycomb-FRP Composite Sandwich Infinite Pipe

The deterioration of our aging underground pipe network emerges as a critical problem. Concrete pipes may be damaged due to salt attack from outside and sulfide attack from inside, hence compromising its structural integrity. Repairs for such pipes are time-consuming and expensive. A revolutionary trenchless structural rehabilitation technique is introduced. In this technique Innovative honeycomb-FRP Composite Sandwich (HCS) are used for retrofitting concrete pipes (InfinitPipe™).