中文摘要：

为揭示土工织物工程应用时处于拉伸状态下的渗透和反滤特性,自主研制了一套多功能渗透试验装置。采用两套独立的、稳定可靠的砝码和杠杆加载机构,可以实现土工织物在单向和双向不同拉伸应力作用情况下的渗透试验。设计开发了一种多功能渗透仪,可以开展纯土工织物以及覆土土工织物在垂向无压和有压情况下的常水头和变水头渗透试验。初步应用结果表明,该试验装置在土工织物无拉伸和无垂向压力情况下的渗透试验结果与满足国标和国际标准要求的渗透仪的试验结果基本一致,且能够实现试验装置设计的所有功能,为后续开展土工织物拉伸条件下渗透和反滤特性的试验研究奠定了基础。

英文摘要：

A multifunctional permeability test apparatus is developed to investigate the permeability and filtration properties of geotextiles under tension as encountered in practice. By adopting two individual sets of stable and reliable counterweight-and-lever loading assemblies, permeability tests can be carried out for geotextiles under either uni-axial or biaxial tension with different tensile stresses. A multifunctional permeameter is designed and developed for performing constant head and falling head permeability tests on geotextiles or soil-covered geotextiles with and without vertical load. The preliminary experimental results show that the permeability of geotextiles without tension and vertical load obtained from the newly developed apparatus is generally consistent with that obtained from a permeameter conform to the national and international standards. Moreover, all functions designed for this apparatus can be accomplished. This provides a basis for future studies on the permeability and filtration properties of geotextiles under tension.