Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6746823 | Geotextiles and Geomembranes | 2018 | 11 Pages |
Abstract
This paper presents the field measurements and analysis of a preloading project with the installation of prefabricated vertical drains (PVDs) in Wenzhou, China. At the site, PVDs were installed to a depth of 22â¯m from the ground surface with a spacing of 1.5â¯m in a triangular pattern. The preloading fill thickness was 6â¯m with a unit weight of approximately 18 kN/m3. After a total elapsed time of 310 days, approximately 3â¯m thick fill was removed. The measured preloading settlement was approximately 1.5â¯m. The measurements and analytical results indicated that the soil layer with PVD improvement reached almost 100% primary consolidation when part of the fill was removed. After partial unloading, the PVD-improved zone was in an over-consolidated state. After the runway was opened for traffic, a settlement increment of approximately 7â¯mm was monitored over a period of 11 months. Analysis indicated that the settlement was mainly due to the consolidation of soil layers below the PVD-improved zone and post-surcharge secondary consolidation of the PVD-improved zone. The values of the parameters related to PVD improvement were back-estimated from the field measurements. These findings can be used to guide the design of PVDs improvement along the east coast of China.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geotechnical Engineering and Engineering Geology
Authors
Jun Wang, Ziquan Fang, Yuanqiang Cai, Jinchun Chai, Peng Wang, Xueyu Geng,