Engineering performance review of matrix/binder conjugated nonwoven geotextiles for weak ground improvement

초록

Performance of matrix/binder isotropic spunbonded nonwoven geotextiles used in weak ground improvement was tested by laboratory and field scales. Also, 2 kinds of isotropic spunbonded nonwoven geotextiles were prepared. One is matrix/binder structure using low melting PET copolymer (co-PET) fibers for web bonding. The other consists of sheath/core (co-PET/PET) fibers. Through index test, it is seen that performances of the sheath/core structure isotropic spunbonded nonwoven geotextiles were more valid to be used for weak ground improvement than matrix/binder structure isotropic spunbonded nonwoven geotextiles. However, through the drainage performance test to be simulated in construction fields, sheath/core structure isotropic spunbonded nonwoven geotextiles showed unstable in construction fields. The matrix/binder isotropic spunbonded nonwoven geotextiles showed better results for the drainage test in construction field and the field test results were suitable for weak ground improvement. © 2019 by the International Society of Offshore and Polar Engineers (ISOPE).

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