Abstract
A series of laboratory model tests were carried out to study the uplift behavior of shallow buried pipe in dense sand. The results of these model tests to assess the response of buried pipes to upward pipe movements were presented. Tests were performed by measuring uplift load-displacement of pipe, soil pressure distribution around pipe and observing slip surface using the model pipe diameter of 260mm with shallow depth of cover (less than two times the pipe diameter D). Slip surface were observed using thin horizontal colored sand layers placed in the sand mass. The results indicate that the experimental data agree well with several analytical models. Then the paper presented the results that were conducted to investigate the suitable protection for uplifting of shallow pipe. The results suggested that the uplift resistance could be increased significantly by the incorporation of geogrids and crushed gravels for backfill materials.
