Abstract: A sewer pipe structure and associate method of construction includes a storage tank connectable to an inflow pipe to receive an inflow of sewage and connectable to an outflow pipe through which the sewage can exit the storage tank. The sewer pipe structure is formed from modular prefabricated sections, including a prefabricated storage pipe section having a cross-sectional area greater than the cross-sectional areas of the inflow and outflow pipes and forming at least part of the storage tank, a prefabricated inflow end cap section fastenable to a first end of the sewer pipe structure to thereby close the first end of the pipe structure, and a prefabricated outflow end cap section fastenable to a second end of the sewer pipe structure to thereby close the second end of the pipe structure. The inflow and outflow end caps include respective connecting means for allowing sewage flow through the pipe section.

Abstract: The present invention relates to a pipe having a pipe section (10) which comprises two or more panels (11, 12, 13, 14, 15) which extend longitudinally along the pipe section (10). Two or more connecting strips (16) are provided which are integers independent from the two or more panels (11, 12, 13, 14, 15). The connecting strips (16) extend longitudinally along the pipe section (10) and each of the connecting strips (16) connects a first panel (e.g. 11) to a second panel (e.g. 12). Preferably, each panel (11, 12, 13, 14, 15) is formed by cutting a one piece pipe lengthwise.

Abstract: A method of lining or relining a tunnel comprises the steps of deforming a collar for insertion into the tunnel, reforming the collar to locate it in the tunnel, overlapping the edges of a pipe having a single longitudinal split to reduce its cross-sectional area for insertion into the tunnel, re-aligning the edges and expanding the pipe in the tunnel for engagement with the sleeve, and securing the edges together to retain the pipe in its expanded form.