Abstract

Nonwoven geotextiles are one of the most widely used geosynthetic materials in drainage and filtration in geotechnical engineering works and applications. In the present study, drainage property of geotextile fabric with three levels of water contamination (20, 40, and 60 gpl) and with clean water has been studied with the variation of transverse loads (1, 3, 5, and 7 kPa) and fabric mass density (300, 600, and 900 g/m²). Transmissivity of geotextile is found to be lower at higher level of water contamination. The effect of water contamination concentration is higher for fabric with higher mass density. However, the effect of contamination on geotextile material is lower at higher transverse load. The effect of transverse load on transmissivity of geotextile is higher for 300 g/m² as compared to 600 and 900 g/m². Although the reduction in transmissivity of fabric with higher mass density (900 g/m²) is higher, still the fabric exhibits better transmissivity behaviour as compared to 300 and 600 g/m².

摘要

非织造土工布是土工工程和应用中排水和过滤中使用最广泛的土工合成材料之一。在本研究中，研究了土工织物在三个水污染水平（20、40 和 60 gpl）和清洁水下的排水性能，横向载荷（1、3、5 和 7 kPa）的变化和织物质量密度（300、600 和 900 g/m ²）。发现土工布的透射率在较高的水污染水平下较低。对于质量密度较高的织物，水污染浓度的影响更大。然而，在较高的横向载荷下，污染对土工织物材料的影响较小。横向荷载对土工布透过率的影响为300 g/m ²更高与 600 和 900 g/m ^{2 相比}。尽管具有较高质量密度 (900 g/m ² ) 的织物的透射率降低更高，但与 300 和 600 g/m ²相比，该织物仍表现出更好的透射率行为。