Abstract
Buried high density polyethylene (HDPE) pipes are often damaged by differential soil settlement. The deformation of the buried pipe as a critical response is widely investigated in previous studies. In this study, a series of full-scale model tests are undertaken to study the deformation of buried HDPE pipes subjected to differential soil settlement. Three HDPE double-wall corrugated pipes with diameter of 300 and 400 mm are installed in the model box at the burial depth of 0.6 m and 0.9 m. Three cross-sections in axial direction of the pipe are instrumented by custom-made settlement plates and strain gauges to monitor the structural responses of the pipe. The results demonstrate that the vertical deflection distribution of HDPE pipes in the longitudinal direction agrees well with the modified Gaussian curve function. The linear regression equations are proposed to correlate the maximum vertical displacement of the pipes with the settlements of the soil surface.
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