Effects of placement method on geotechnical behavior of hydraulic fill sands

Results of an investigation of the geotechnical behavior of a hydraulic san d placed at a land reclamation site in Hong Kong are presented and interpre ted. The study was conducted to aid in developing guidelines for quality co ntrol of hydraulic landfill placement. The work described consisted of: (1) field investigations; (2) static and cyclic triaxial testing; and (3) cali bration chamber tests to study the cone penetration test versus D-r relatio nships for marine sands obtained from the reclamation sites. The results of this study clearly indicate that the placement technique is the single mos t important factor controlling the geotechnical behavior of a given type of sand when placed as a hydraulic fill. The weakest zone is generally locate d just beneath the water level where fill deposition is placed by pipeline discharge.