A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluating Geotextile Tube Dewatering Performance at Scudders Pond Using Cationic Starches
Scudders pond was designed to be a bio-filter for water that is released into Hempstead harbor in Seacliff, NY. Due to the significant increase in the height of sediments in the pond, the pond's capacity to retain water decreased, and the storm water was transferred to the harbor without any improvement in water quality. Therefore, in an effort to restore the pond to its original capacity, three feet of sediments needed to be dredged from the bed of the pond. WaterSolve LLC was assigned to dredge the sediments from the bottom of the pond to restore its normal levels using geotextile tubes. Geotextile tubes are a recent technology that has proved to be a cost effective technique for the dewatering project. The dewatering performance and effluent clarity of the geotextile tubes at Scudders pond was evaluated using a geotextile tube demonstration test (GDT) and a pressurized geotextile tube demonstration test (PGDT). GDTs and PGDT were conducted at the site and at Syracuse University Geotechnical Laboratory. A starch based cationic flocculant was also used as an alternative to the synthetic flocculant that was used in the dewatering project. The results of the GDT and PGDT tests conducted in the field were compared with the GDTS that were conducted in the laboratory. The tests were conducted using two different sediments that were obtained from different locations of the pond. Furthermore, centrifuge tests were conducted to predict the final solids content in the geotextile tubes. Based on the tests results, the final solids content of the filter cakes of the GDTs was determined to be dependent of the sediment's properties. The solid's content from the field tests was about 14%, and about 35% in the laboratory tests. It was also found that the solid content values that were obtained from centrifuge tests was comparable to filter cakes from GDTs. Moreover, it was found that cationic starch flocculant allowed for slightly faster dewatering rate than the synthetic flocculants.
Evaluating Geotextile Tube Dewatering Performance at Scudders Pond Using Cationic Starches
Scudders pond was designed to be a bio-filter for water that is released into Hempstead harbor in Seacliff, NY. Due to the significant increase in the height of sediments in the pond, the pond's capacity to retain water decreased, and the storm water was transferred to the harbor without any improvement in water quality. Therefore, in an effort to restore the pond to its original capacity, three feet of sediments needed to be dredged from the bed of the pond. WaterSolve LLC was assigned to dredge the sediments from the bottom of the pond to restore its normal levels using geotextile tubes. Geotextile tubes are a recent technology that has proved to be a cost effective technique for the dewatering project. The dewatering performance and effluent clarity of the geotextile tubes at Scudders pond was evaluated using a geotextile tube demonstration test (GDT) and a pressurized geotextile tube demonstration test (PGDT). GDTs and PGDT were conducted at the site and at Syracuse University Geotechnical Laboratory. A starch based cationic flocculant was also used as an alternative to the synthetic flocculant that was used in the dewatering project. The results of the GDT and PGDT tests conducted in the field were compared with the GDTS that were conducted in the laboratory. The tests were conducted using two different sediments that were obtained from different locations of the pond. Furthermore, centrifuge tests were conducted to predict the final solids content in the geotextile tubes. Based on the tests results, the final solids content of the filter cakes of the GDTs was determined to be dependent of the sediment's properties. The solid's content from the field tests was about 14%, and about 35% in the laboratory tests. It was also found that the solid content values that were obtained from centrifuge tests was comparable to filter cakes from GDTs. Moreover, it was found that cationic starch flocculant allowed for slightly faster dewatering rate than the synthetic flocculants.
Evaluating Geotextile Tube Dewatering Performance at Scudders Pond Using Cationic Starches
Khachan, Mahmoud M. (author) / Kiffle, Zeru B. (author) / Bhatia, Shobha K. (author) / Lebster, Gregg (author) / Wilcox, Daniel R. (author) / Kaye, Peter (author) / Timpson, Chris (author)
Geosynthetics, Geosynthetics Conference, 2015 ; 1061-1069
2015
9 Seiten, Bilder, Tabellen, Quellen
Conference paper
Storage medium
English
Investigations of Geotextile Tube Dewatering
| British Library Conference Proceedings | 2011
Geotextile Tube Dewatering: Filtration Criteria
| British Library Conference Proceedings | 2008
Investigations of Geotextile Tube Dewatering
| ASCE | 2011