Piezometer measurements of prefabricated vertical drain improvement of soft soils under land reclamation fill

Abstract

Piezometers are commonly used for monitoring the dissipation of pore water pressure and therefore the determination of degree of consolidation of soft soils after ground improvement in land reclamation projects. This paper compares the degree of consolidation obtained using pore pressure monitoring data from vibrating wire piezometers and pneumatic piezometers installed in a test site in the Changi East Reclamation project in Singapore. The test site consisted of a vertical drain sub-area at which prefabricated vertical drains were installed at 2.0. m. ×. 2.0. m square spacing as well as an adjacent control sub-area where no prefabricated vertical drains were installed. Pneumatic piezometers..