Experimental evaluation on in-soil water migration reducing performance of restraining moisture geotextile (RMG)

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes Pub Date : 2024-07-30 DOI:10.1016/j.geotexmem.2024.07.007

Yilin Wang , Xinzhuang Cui , Qing Jin , Xiaoning Zhang , Linzhao Ding , Guoyang Lu

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引用次数: 0

Abstract

Engineering materials such as geosynthetics clay liners (GCL) and gravel layers are effective to cut off the in-soil water migration and have been widely employed to stabilize the moisture content of subgrades. However, the moisture stabilizing performance of GCL or gravel layer is usually compromised due to the complexity of service condition. This paper introduces an engineering material named restraining moisture geotextiles (RMG), which is expected to show low permeability as GCL. With characterization of basic properties of RMG, moisture migration column test of silty soil and test cases with employments of RMG, GCL, and gravel layer are performed, respectively. The temperature and moisture fields of soil columns subjected to a freezing-thawing process are measured, and the capillarity and in-soil water migrating behavior are analyzed. Carbon footprints of GCL and RMG are compared and discussed. Test results show that RMG, GCL and gravel layer are effective to cut off the capillarity, but the gravel layer can result in higher moisture content in silty soil due to the vapor migration and capillary isolation. In conclusion, RMG can be an alternative method with low permeability on reducing the in-soil water migration, and is much lighter and more engery-efficient than GCL.

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抑制水分土工织物（RMG）减少土内水分迁移性能的实验评估

土工合成材料粘土衬里（GCL）和砾石层等工程材料可有效阻止土壤中水分的迁移，已被广泛用于稳定基层的含水量。然而，由于使用条件的复杂性，GCL 或砾石层的稳湿性能通常会大打折扣。本文介绍了一种名为 "抑制水分土工织物（RMG）"的工程材料，它有望像 GCL 一样表现出低渗透性。在确定了 RMG 的基本特性后，分别对淤泥质土壤进行了水分迁移柱试验，并对 RMG、GCL 和砾石层的使用情况进行了试验。测量了土柱在冻融过程中的温度场和湿度场，分析了毛细管和土中水迁移行为。比较并讨论了 GCL 和 RMG 的碳足迹。试验结果表明，RMG、GCL 和砾石层都能有效地切断毛细管，但砾石层会因水汽迁移和毛细管隔离而导致淤泥土壤含水量升高。总之，RMG 可以作为减少土内水迁移的低渗透替代方法，而且比 GCL 更轻、更节能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.