Abstract Reinforced subgrade for railways (RSR) is a construction method in which reinforced subgrade is constructed first and a rigid facing wall later to minimize the residual settlement after the service of a roadbed. The RSR was designed and constructed at Osong railway test line in Korea. In this study, load sharing capacities from the reinforced subgrade to the rigid facing wall of it were evaluated through long-term measurement, extending 22 months from the start of roadbed construction to the completion of track construction. Under the condition of 0.4 m geogrid vertical spacing installation, the load sharing proportion of horizontal earth pressure of the rigid facing wall was 9%–22% in the lower part, and lesser in the upper part. The strain of geogrid during construction was 0.607%, which was relatively lower than the designed geogrid tensile strain of 5%. The change in geogrid strain after construction was closely correlated with temperature change in the soil.

中文翻译：

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土工格栅加筋铁路路基刚性面墙施工期间和施工后的荷载分担特性

摘要 铁路加固路基（RSR）是一种先加固路基，后筑刚性面墙，以减少路基使用后残余沉降的施工方法。RSR是在韩国五松铁路试验线上设计和建造的。在这项研究中，从路基施工开始到轨道施工完成的时间为 22 个月，通过长期测量评估了从加固路基到其刚性面墙的负载分担能力。在土工格栅竖向间距为0.4 m的情况下，刚性面墙的水平土压力分担比例在下部为9%～22%，上部较小。土工格栅施工时应变为0.607%，这相对低于设计的土工格栅拉伸应变 5%。土工格栅施工后应变的变化与土壤温度变化密切相关。