本文是Flottweg Veronesi的John E Remfy对污泥处理和脱水技术的展望,该技术能使工业企业的治污成本最低.在过去的五到十年里,排污费用愈日剧增,迫使许多工业企业在将其污水排入当地官方处理厂或国内排水管道之前进行处理.这样做通常是...本文是Flottweg Veronesi的John E Remfy对污泥处理和脱水技术的展望,该技术能使工业企业的治污成本最低.在过去的五到十年里,排污费用愈日剧增,迫使许多工业企业在将其污水排入当地官方处理厂或国内排水管道之前进行处理.这样做通常是经济的.然而,在某些情况下,污水,尤其是含有毒组分的污水,在某些化学处理之前或至少是中和处理之前,不能排入市政管道.此举已在工业企业所有化学和生物处理厂的建设和运转中造成极大影响.展开更多
Using geotextile bag dehydrated soil to construct dikes for land reclamation to substitute conventional straw bags is an urgent need in Tianjin New Harbor, China. This paper introduces the method to build a dike for h...Using geotextile bag dehydrated soil to construct dikes for land reclamation to substitute conventional straw bags is an urgent need in Tianjin New Harbor, China. This paper introduces the method to build a dike for hydraulic filling. The soil for filling the geotextile bags was tested in wave trench; the stress developed during construction was calculated by establishing a numerical model and compared with the tensile strength of the geotextile; the stability and settlement of the dike were estimated by performing centrifuge tests. Through this study, the following information was obtained: 1) The cohesionless silt with plasticity index less than 10 is suitable for filling the geotextile bags. The geotextile bag dehydrated soil consolidated very quickly even under the action of wave force. 2) A numerical model was devised to find the limit injection height and to calculate the tensile stress developed in the geotextile bags when they were piled up to form the dike. The calculated stress was compared with the strength of the geotextile, showing that the design is reasonably safe. 3) Centrifuge test results show that the designed dike will be stable and the settlement of dike will be less than the design requirement.展开更多
文摘本文是Flottweg Veronesi的John E Remfy对污泥处理和脱水技术的展望,该技术能使工业企业的治污成本最低.在过去的五到十年里,排污费用愈日剧增,迫使许多工业企业在将其污水排入当地官方处理厂或国内排水管道之前进行处理.这样做通常是经济的.然而,在某些情况下,污水,尤其是含有毒组分的污水,在某些化学处理之前或至少是中和处理之前,不能排入市政管道.此举已在工业企业所有化学和生物处理厂的建设和运转中造成极大影响.
文摘Using geotextile bag dehydrated soil to construct dikes for land reclamation to substitute conventional straw bags is an urgent need in Tianjin New Harbor, China. This paper introduces the method to build a dike for hydraulic filling. The soil for filling the geotextile bags was tested in wave trench; the stress developed during construction was calculated by establishing a numerical model and compared with the tensile strength of the geotextile; the stability and settlement of the dike were estimated by performing centrifuge tests. Through this study, the following information was obtained: 1) The cohesionless silt with plasticity index less than 10 is suitable for filling the geotextile bags. The geotextile bag dehydrated soil consolidated very quickly even under the action of wave force. 2) A numerical model was devised to find the limit injection height and to calculate the tensile stress developed in the geotextile bags when they were piled up to form the dike. The calculated stress was compared with the strength of the geotextile, showing that the design is reasonably safe. 3) Centrifuge test results show that the designed dike will be stable and the settlement of dike will be less than the design requirement.
