Experimental, Environmental and Finite Element Analysis of the Woven Polyester Geotextile Tube

 

Neeraj Kumar Das

Post Graduate Student
Civil Engineering Department
Indian Institute of Technology Bombay, Powai, Mumbai, India
e-mail: nrjkmr.das@gmail.com

B.Ram Rathan Lal

Research Scholar Civil Engineering Department
Indian Institute of Technology Bombay, Powai, Mumbai, India
e-mail: rathan_lal@iitb.ac.in

J.N. Mandal

Professor
Civil Engineering Department
Indian Institute of Technology Bombay, Powai, Mumbai, India
e-mail: cejnm@civil.iitb.ac.in

 

 ABSTRACT

Hanging bag is hand made with multifilament woven polyester geotextile and is used in the testing. The woven polyester geotextile is stitched by hand to make geotextile tube of length 1.53 m and with circumference of 1.02 m. Two different types of materials were used to prepare slurries for dewatering purpose, Marine clay and fly ash. For every water level drop of 0.075 m starting from initial top level surface of slurry in hanging bag the corresponding time is noted. The maximum dewatering flow rate value for marine clay slurry is 0.008734 m3/hr and for fly ash slurry is 0.0992 m3/hr. The environmental analysis of the slurry before the hanging bag test and effluent water after the hanging bag test is done to check the efficacy of the dewatering system utilizing the woven multifilament woven polyester geotextile tube. The amount of Sodium (Na), Iron (Fe), Calcium (Ca), Zinc (Zn) and Phosphorous (P) present in the slurry were reduced considerably after the test. The finite element simulation of woven polyester multifilament geotextile tube is done by using software PLAXIS Version 8.2. The results of finite element simulation are found in good agreement with experimental results.

Keywords: Geosynthetics, Hanging bag, Marine clay, Fly ash, Multifilament woven polyester geotextile, dewatering, flow rate

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