长江科学院院报2024，Vol.41Issue(7)：126-131,157,7.DOI:10.11988/ckyyb.20230358
包裹式加筋土桥台结构性能现场试验研究
Field Monitoring on Structural Performance of a Mixed Geosynthetics Reinforced Soil Abutment
摘要
Abstract
Field test was conducted to examine the structural performance of a mixed geosynthetics reinforced soil(GRS)abutment in the Mingguang to Chaohu Expressway project in Anhui Province.The horizontal stresses behind face slab and pile,horizontal dislacement and settlement of the face slab,and the geogrid strains were examined based on monitoring data collected over 330 days post-construction of the mixed GRS abutment.The impact of geo-grid truncation on horizontal stresses was also examined.Results indicated that horizontal stress distribution behind the face slab was non-linear,with maximum values occurring in the middle,while stresses gradually increased to-wards the bottom due to toe restraint.Geogrid truncation around piles had minimal influence on horizontal stresses.Horizontal stress distribution behind pile was linear along the elevation,with reduced stress on the top due to the presence of cap beam.Furthermore,face slab deformations stabilized within 150-180 days post-construction,with maximum deformations observed near the road's centerline.Geogrid strain distributed non-linearly along the wall height,demonstrating elastic behavior with shrinkage and rebound under service conditions,indicating the geogrid is far from reaching ultimate strain.Overall,the mixed GRS abutment exhibits minimal deformation,and the moni-toring data collected during the service period can inform the design and construction of similar projects.关键词
土工合成材料/加筋土桥台/格栅截断/现场监测/结构性能Key words
geosynthetics/reinforced soil abutment/geogrid truncation/filed monitoring/structural performance分类
建筑与水利引用本文复制引用
王清明,徐超,李昊煜,赵崇熙,孟亚,沈盼盼..包裹式加筋土桥台结构性能现场试验研究[J].长江科学院院报,2024,41(7):126-131,157,7.基金项目
国家自然科学基金项目(42002270,41772284) （42002270,41772284）
安徽省交通运输行业重点科技项目(2021-KJQD-016) （2021-KJQD-016）
