Abstract
Geotubes are made by sewing geotextiles together and geotextiles are woven with warp and weft threads of different mechanical properties. This research explores effect of geotextile sewing method on dewatering performance of geotubes using a hanging bag test. Two types of hanging bags are made by different geotextile sewing methods: horizontal bag with the warp threads along its circular direction and vertical bag with the warp threads along its axial direction. The test results show that the dewatering performance of the bag is better if its weft stress is greater than warp stress. Combined with the stress analysis of a simplified geotube, the effect of geotextile sewing method on dewatering performance of geotubes is obtained: when the circumferential direction of geotubes is consistent with the weft threads, dewatering performance of geotubes will be better. This finding has the potential to act as a guideline for construction of geotubes in engineering.
Highlights
Geotube dams have been widely used in coastal port wharf, sea dam, and other estuary and coastal engineering due to high adaptability to foundation deformation, fast construction speed and low cost [1]
Jin et al [6] conducted an experimental study on the deformation of a geotube in different directions during the filling process, and the results showed that the point with the smallest deformation was at the maximum width of the geotube
The stress analysis of a simplified geotube indicates that the circumferential stress is greater than the axial stress in the filling process of a geotube
Summary
Geotube dams have been widely used in coastal port wharf, sea dam, and other estuary and coastal engineering due to high adaptability to foundation deformation, fast construction speed and low cost [1]. The results showed that the equivalent pore diameter and permeability coefficient of the geotextile would increase when subjected to unidirectional tensile force. The results showed that with the increase of normal pressure, the permeability coefficient of the geotextiles decreased significantly. EFFECT OF GEOTEXTILE SEWING METHOD ON DEWATERING PERFORMANCE OF GEOTUBES: AN EXPERIMENTAL STUDY. The results showed that the permeability under biaxial tension and no tension states was significantly different, and the overall permeability coefficient of the system under biaxial tension first decreased and increased. It is necessary to investigate the effect of geotextile sewing method on dewatering performance of geotubes.
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