Laboratory Investigation on the Static Response of Repaired Sewers

摘要

This paper examines and characterizes the structural response of intimately fitted repairedrnsewers due to disturbance in the vicinity (e.g. vehicle loads). This soil-host pipe-linerrninteraction is investigated by full scale laboratory testing. The test geometry andrnmeasurement scheme are described. Mechanisms affecting local bending at host pipernfractures are identified. A comparison is made between response for the HDPE linerrnwithin a fractured non-reinforced concrete pipe, and that same HDPE liner buried alonernin soil. Under earth disturbance, the fractures in the host pipe expanded at the innerrnsurface at the crown and invert, and at the outer surface at the springlines. Thisrnexpansion of fractures caused contacts between the inner edges of the host pipe and thernliner at the crown and invert. The liner response was dominated by the local bending thatrnresulted.