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Experimental investigation of a reinforced soil retaining wall with a flexible geogrid-wrapped ecological bag facing
Geotextiles and Geomembranes ( IF 4.7 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.geotexmem.2020.08.005
Junyi Duan , Guolin Yang , Yuliang Lin , Xinting Cheng , Zhihao Dai

Abstract This paper presented a field study of the reinforced soil wall (RSW) with a geogrid wrap-around facing. In addition to the conventional monitoring content, the strain of the face-wrapping geogrid, which was neglected in most previous studies, was monitored during the construction process. The positional relationship between the maximum vertical earth pressure and horizontally laid geogrid strain was revealed by using the proposed oblique dragging effect. It was found that the strain on the face-wrapping geogrid occurred mainly in the early stage of construction. The oblique dragging effect existing in the flexible RSWs increased the vertical earth pressure and changed its distribution law, resulting in the position of the maximum vertical soil pressure appearing behind the position of the maximum horizontally laid geogrid strain. The horizontal earth pressure at different positions behind the wall was obviously lower than the theoretical result by using Rankine's theory. Also, a modified 0.3H method (where H refers to the wall height) was presented to account for the slope of the wall face, which could be used to determine the potential sliding surfaces for single-stage RSWs and two-tier RSWs with small offset.

中文翻译:

柔性土工格栅包裹生态袋饰面加筋土挡土墙试验研究

摘要 本文介绍了带有土工格栅环绕饰面的加筋土墙 (RSW) 的现场研究。除了常规的监测内容外,在施工过程中还监测了以往研究中忽略的包面土工格栅应变。利用所提出的斜拖效应揭示了最大垂直土压力与水平铺设土工格栅应变之间的位置关系。结果表明,贴面土工格栅的应变主要发生在施工初期。柔性RSW中存在的斜拖效应使竖向土压力增加并改变其分布规律,导致最大竖向土压力位置出现在水平铺设土工格栅最大应变位置之后。墙后不同位置的水平土压力明显低于Rankine理论的理论结果。此外,还提出了一种改进的 0.3H 方法(其中 H 是指墙高)来考虑墙面的坡度,该方法可用于确定单级 RSW 和具有较小尺寸的两层 RSW 的潜在滑动面。抵消。
更新日期:2021-02-01
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