中国铁道科学2025，Vol.46Issue(6)：67-76,10.DOI:10.3969/j.issn.1001-4632.2025.06.07
多雨丘陵地区铁路2级加筋格宾挡墙施工期力学行为现场试验
Field Test of Mechanical Behavior of Two-Tier Reinforced Gabion Retaining Wall for Railway Construction in Rainy Hilly Areas
摘要
Abstract
To investigate the mechanical behavior of two-tier reinforced gabion retaining walls for railways in rainy hilly areas during construction,a field test was conducted to study the structural deformation,soil pressure in the wall,and reinforcement strain.Findings reveal that horizontal displacements at the anti-slide pile top,upper/lower-tier wall surfaces,and non-reinforced soil zone gradually increased and stabilized over time.Horizontal displacements of upper/lower-tier wall surfaces and non-reinforced soil zone showed approximate linear growth from bottom to top along the wall height,with non-reinforced soil zones exhibiting greater displacement than reinforced soil zone.Settlements at the wall base and the tops of lower-tier and upper-tier progressively increased then stabilized over time.Compression deformation in reinforced soil zone was smaller than that in non-reinforced soil zone during standing period,and settlement increased with horizontal distance from the wall face.Measured vertical soil pressures at the upper/lower-tier wall bases were lower than theoretical calculation values of soil self-weight.For horizontal soil pressure,the measured horizontal soil pressure acting on upper-tier wall panel were greater at the top and smaller at the bottom compared to theoretical values,while those on the lower wall panel were significantly reduced.Horizontal soil pressure acting on the back of reinforced soil zone(the section connecting ends of all reinforced layers)was close to the theoretical static soil pressure in the upper-tier wall,but substantially lower in the lower-tier wall.In terms of geogrid strain and potential failure surface,the maximum geogrid strain was 0.7%,and the measured potential failure surface was close to that predicted by the Federal Highway Administration(FHWA)design method for reinforced soil retaining wall.During rainy seasons,structural deformation and soil pressure showed slight increase,while the geogrid strain decreased slightly.关键词
铁路/2级加筋格宾挡墙/抗滑桩/力学行为/现场试验Key words
Railway/Two-tier reinforced gabion retaining wall/Anti-slide pile/Mechanical behavior/Field test分类
交通工程引用本文复制引用
周先才,徐健楠,杨广庆,周诗广,孟潇康,王贺..多雨丘陵地区铁路2级加筋格宾挡墙施工期力学行为现场试验[J].中国铁道科学,2025,46(6):67-76,10.基金项目
国家重点研发计划项目(2022YFE0104600) （2022YFE0104600）
国家自然科学基金资助项目(52079078) （52079078）
