Evaluating the Performance of Wicking Geotextile in Providing Drainage for Flexible Pavements Built over Expansive Soils
Evaluating the Performance of Wicking Geotextile in Providing Drainage for Flexible Pavements Built over Expansive Soils
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评估芯吸土工布为膨胀土上修建的柔性路面提供排水的性能
DOI：
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发表时间：
2021
影响因子：
1.7
通讯作者：
Sayantan Chakraborty
中科院分区：
文献类型：
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作者：
Nripojyoti Biswas;A. Puppala;Md. Ashrafuzzaman Khan;S. Congress;A. Banerjee;Sayantan Chakraborty
路面部分的寿命和性能取决于路基土壤的特性。美国德克萨斯州北部的大部分人行道，都建在膨胀土上在膨胀土分布较多的地区，车辙、裂缝和不均匀胀缩是造成路面使用性能恶化的一种常见现象。路面，特别是那些为低交通量条件下建造的路面，由于底层问题土壤的高度膨胀和收缩特性而经历痛苦。传统上，土工合成材料被用于改善这种不良路基，因为它们具有许多优点，例如易于安装，以及足够的机械和水力性能。在过去的十年中，一个新的可用的芯吸土工织物，具有水分再分布能力，已被开发，以提高性能的路面上建造的膨胀和冻土。在这项研究中，小规模的实验室和全面的现场研究进行了了解这种创新的土工织物在膨胀土环境中的芯吸能力。全尺寸的试验段是用再生沥青路面骨料和传统的碎石骨料在德克萨斯州北部附近的基层建造的。本文详细讨论了施工和仪器程序。还进行了交通荷载和水分入侵下路面部分性能的比较研究。此外，车辙寿命的路段，估计使用线弹性模型，进行了比较和验证，使用现场数据。在初始阶段的观察表明，芯吸土工织物有潜力提高长期路面性能。
The longevity and performance of a pavement section depend on the characteristics of the subgrade soil. A majority of the pavements in North Texas, U.S., are constructed on expansive soils. The deterioration of the pavement performance because of rutting, cracking, and differential heaving is a regular phenomenon in the regions predominantly distributed with expansive soils. The pavements, particularly those built for low-volume traffic conditions, experience distress because of the high swelling and shrinkage characteristics of the underlying problematic soils. Geosynthetics have been traditionally used to improve such poor subgrades because of their many benefits, such as ease of installation, and ample mechanical and hydraulic properties. In the last decade, a newly available wicking geotextile, with a moisture redistribution capacity, has been developed to improve the performance of pavements constructed over expansive and frozen soils. In this study, small-scale laboratory and full-scale field studies were conducted to comprehend the wicking ability of this innovative geotextile in an expansive soil environment. Full-scale test sections were constructed with reclaimed asphalt pavement aggregate and traditional crushed stone aggregates in the base layer near North Texas. Details of the construction and instrumentation procedure are discussed in this paper. A comparative study between the performance of the pavement sections subjected to traffic loads and moisture intrusion was also performed. Furthermore, the rutting life of the sections, estimated using a linear elastic model, was compared and validated using the in situ data. The observations during the initial phase indicated that the wicking geotextile has the potential to improve the long-term pavement performance.