Pre- and Post-Improvement Performance of a Railway Embankment Stabilized with Ductile Inclusions

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

Abstract

Large deflections and accumulation of permanent track geometry defects at railway soft spots cause significant operational issues including increased maintenance costs, decreased train speed, and, at an extreme, derailments and track failures. Reinforcing inclusions placed between the ties are a promising rehabilitation scheme to locally stabilize the embankment and transfer the loads to deeper, more suitable soils. In this paper we report the results of a long-term monitoring program to assess the performance of ductile inclusions, known commercially as “GeoSpike® elements”, to stabilize a rapidly deteriorating railway soft spot. Observations of track bed behavior are presented for 8 months prior to installation and 15 months after installation using a combination of LIDAR, Digital Image Correlation (DIC), and ShapeAccelArrays (SAA). Through the monitoring program, it was determined that the ductile inclusions decreased the average rate of deterioration by a factor of approximately 3, which allowed the frequency of site maintenance to be decreased from three times a year to once a year.

用延展性夹杂物稳定的铁路路堤的改进前和改进后性能
铁路软点处的大挠度和永久性轨道几何缺陷的积累会造成严重的运营问题,包括维护成本增加、列车速度降低,以及极端情况下的脱轨和轨道故障。在轨枕之间放置加固内含物是一种很有前景的修复方案,可局部稳定路堤,并将荷载转移到更深、更合适的土壤中。本文报告了一项长期监测计划的结果,该计划旨在评估韧性内含物(商业上称为 "GeoSpike® 元件")的性能,以稳定快速恶化的铁路软点。报告采用激光雷达、数字图像相关性 (DIC) 和 ShapeAccelArray (SAA) 技术,对安装前 8 个月和安装后 15 个月的轨床行为进行了观察。通过监测计划,可以确定韧性内含物将平均损坏率降低了约 3 倍,从而将现场维护频率从每年三次降低到每年一次。
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
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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