期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2013
卷号：2
期号：8
页码：3675
出版社：S&S Publications
摘要：Prefabricated vertical drains (PVD) are commonly used to decrease the drainage path within soft soils toaccelerate the time of primary consolidation. Prefabricated vertical drains are displacement drains of small volumethat exhibits considerably with fewer disturbances to the soil mass than the displacement sand drains. Disturbance tosoil mass due to installation of PVD at three construction sites in Navi Mumbai area is evaluated in this work. Thiswork emphasizes ground improvement mechanism for proposed embankment for double track broad gauge railwayline between Belapur-Seawood-Uran areas in Navi Mumbai for chainage 19000 to 20500 along the proposedrailway track. The study of the soil in this geographical region indicates that the top of the stratification contains theyellowish stiff clay. The next layer observed in the stratification contains the soft grayish marine clay which is thenfollowed by yellowish stiff/hard clay with gravels. The subsequent layers of stratification are completely weatheredrock which was then observed by moderately weathered rock. The data collected and analyzed in this study includesgeneral soil details, index properties of compressible soil, shear strength properties, consolidation properties and preconsolidationpressure. It has been observed that the time required for consolidation with prefabricated verticaldrains is expected to be shorter as compared to the time required for the preloading alone without PVD. The closerthe spacing in between prefabricated vertical drain the shorter the time required for the consolidation process. Theexpected consolidation settlement achieved by PVD is slightly higher than actual field consolidation settlement.
