| Application of Geotextile Bag Dehydrated Soil to Dike Construction |
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| 作者姓名： | 朱平 闫澍旺 刘润 |
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| 作者单位： | GeotechnicalResearchInstitute,TianjinUniversity,Tianjin300072,China |
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| 摘 要： | 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.
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| 关 键 词： | 土工织物包脱水土 堤防 土地改良 煤粉 离心机试验 |
Application of Geotextile Bag Dehydrated Soil to Dike Construction |
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| ZHU Ping,YAN Shu-wang,LIU Run.Application of Geotextile Bag Dehydrated Soil to Dike Construction[J].Transactions of Tianjin University,2004,10(4):297-303. |
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| Authors: | ZHU Ping YAN Shu-wang LIU Run |
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| Abstract: | 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. |
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| Keywords: | geotextile bag dehydrated soil silt dike reclamation centrifuge test |
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