Enhanced drainage performance of PVF-wicking geosynthetics: Development and experimental assessment

IF 4.7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
Xiaohui Sun , Ziyi Chen , Fan Chen , Silin Wu , Wuyu Zhang , Yuansheng Peng , Guilin Chen
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Abstract

An enhanced geosynthetic material, PVF-wicking geosynthetic (PWG), was developed to improve the performance of the wicking geosynthetic product family, e.g., the wicking geotextile (WG). The PWG was made by coating deep-grooved wicking yarns and reinforcement with the layered polyvinyl alcohol formaldehyde (PVF) high-absorbent materials. The drainage performance of PWG was assessed through beaker drainage tests and soil column tests. The results of the beaker drainage test and SEM images indicate that PVF does not obstruct the deep-grooved yarns. It is found that, by facilitating efficient water absorption, storage, and transfer as a transit layer between the subgrade and wicking yarns, PVF plays a crucial role in enhancing the drainage capabilities of the geosynthetic material. PWG outperforms WG in terms of drainage efficiency under both static and cyclic loading conditions. The mechanism of the drainage improvement by PWG under cyclic loading is that the excess pore pressure within the PVF layer accelerates the water transfer from the pores of the PVF into the grooves of yarns. PWG, included with reinforcement, exhibited comparable interface characteristics to WG, with the potential to meet the requirements of soil stabilization. The remarkable drainage efficiency of PWG underscores its potential for practical applications.

增强 PVF 吸水土工合成材料的排水性能:开发与实验评估
为了提高吸水土工合成产品系列(如吸水土工布)的性能,开发了一种增强型土工合成材料--聚乙烯醇醛吸水土工合成材料(PWG)。PWG 是通过在深槽吸水纱线和加固材料上涂覆分层聚乙烯醇甲醛(PVF)高吸水性材料制成的。通过烧杯排水试验和土柱试验评估了 PWG 的排水性能。烧杯排水试验和扫描电镜图像的结果表明,PVF 不会阻碍深槽纱线。研究发现,PVF 作为基层和吸水纱之间的中转层,能促进水分的有效吸收、储存和转移,在增强土工合成材料的排水能力方面发挥了重要作用。在静态和循环荷载条件下,PWG 的排水效率都优于 WG。在循环荷载条件下,PWG 提高排水性能的机理是,PVF 层内过剩的孔隙压力加速了水从 PVF 的孔隙转移到纱线的沟槽中。与加固材料一起使用的 PWG 具有与 WG 相当的界面特性,有望满足土壤稳定的要求。PWG 卓越的排水效率凸显了其在实际应用中的潜力。
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来源期刊
Geotextiles and Geomembranes
Geotextiles and Geomembranes 地学-地球科学综合
CiteScore
9.50
自引率
21.20%
发文量
111
审稿时长
59 days
期刊介绍: The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.
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