评估水泥处理过的土工织物在循环荷载下作为公路基层加固材料的使用情况

IF 4.9 2区 工程技术 Q1 ENGINEERING, CIVIL
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引用次数: 0

摘要

本研究对覆盖在软弱基层土壤上的基层进行了大规模循环加载实验。土工织物和水泥处理过的土工织物被用来加固基层材料,并隔离基层和路基之间的土壤界面。使用土工织物和水泥处理过的土工织物进行的重复加载试验所获得的结果根据一些基准指标进行了分析和评估,如总变形、永久变形、弹性变形、弹性变形百分比、交通效益比(TBR)、弹性模量(M)、改进系数(I)和车辙深度减少比(RDR)。根据实验结果,与使用土工织物相比,使用水泥处理过的土工织物作为基层加固元件或界面分离元件具有更好的性能。使用水泥处理过的土工织物作为加固和分离元件,5000 次循环后的 RDR 值为 49.26%。此外,与仅使用土工织物进行分离相比,同时使用水泥处理过的土工织物进行加固和分离可将 27 毫米变形时的 TBR 值提高到 14.62,将永久变形值从 53.67 毫米降低到 27.23 毫米,并接近约 2 个改进因子值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of the utilization of cement-treated geotextile as a reinforcement element for highway base layer under cyclic loading

This study conducted large-scale cyclic loading experiments on the base layer overlying a weak subgrade soil. Geotextile and cement-treated geotextile were utilized to reinforce the base material and to separate the interface of soils between the base layer and the subgrade. The results obtained from the repeated loading tests using geotextile and cement-treated geotextile were analyzed and evaluated in terms of some benchmark indicators such as total deformation, permanent deformation, elastic deformation, percentage of elastic deformation, traffic benefit ratio (TBR), elastic modulus (MR), improvement factor (If), and rut depth reduction ratio (RDR). Based on the experimental results, the use of cement-treated geotextile as a base layer reinforcement element or as an interfacial separation element demonstrated better performance compared to the use of geotextile. Utilization of a cement-treated geotextile as both reinforcement and separation element resulted in an RDR value of 49.26 % after 5000 cycles. Additionally, using a cement-treated geotextile for both reinforcement and separation increased the TBR value to 14.62 at 27 mm deformation, decreased the permanent deformation value from 53.67 mm to 27.23 mm, and approached approximately 2 improvement factor values, compared to using the geotextile solely for separation.

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来源期刊
Transportation Geotechnics
Transportation Geotechnics Social Sciences-Transportation
CiteScore
8.10
自引率
11.30%
发文量
194
审稿时长
51 days
期刊介绍: Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.
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