Field Test Study on a New Type of Reinforced Retaining Wall with Full-Height Rigid Facing for Railway

被引:0
作者
Niu X. [1 ,2 ]
Yang G. [1 ,3 ]
Zhou S. [4 ]
Yang G. [1 ,3 ]
Wang Z. [6 ]
Wang H. [3 ]
机构
[1] State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang
[2] School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang
[3] School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang
[4] China Railway Society, Beijing
[5] China State Railway Group Co., Ltd., Beijing
[6] China Railway Eryuan Engineering Group Co., Ltd., Chengdu
来源
Zhongguo Tiedao Kexue/China Railway Science | 2020年 / 41卷 / 05期
关键词
Chengdu-Kunming Railway; Displacement; Field test; Full-height rigid facing; Reinforced retaining wall; Soil pressure;
D O I
10.3969/j.issn.1001-4632.2020.05.01
中图分类号
学科分类号
摘要
Based on the new type of reinforced retaining wall with full-height rigid facing for Chengdu-Kunming Railway, the variation rules of the vertical stress of retaining wall base, the horizontal and vertical soil pressures on the back of gravel bag, geogrid strains at different layers, the wall compression and the horizontal displacement of wall facing were studied through field prototype test. Results show that the vertical stress of the base is bimodal along the length of the reinforcement. The vertical stress of the base near the gravel bag decreases with time, while the rest increases with time. The horizontal and vertical soil pressures on the back of gravel bag are nonlinear along the height of the wall. The grid strain changes with time in a bimodal manner, and the change rate increases gradually from the bottom to the top of the wall. After the facing is completed, the growth rate of wall compression decreases obviously. The wall compression in the roadbed center is greater than that in the roadbed shoulder. The overall horizontal displacement of the wall facing is less than 1 mm. The seismic performance of the retaining wall is good. After two earthquakes with the magnitudes of 5.1 and 3.3, the maximum vertical stress of the base increases by 4.9 %. The horizontal and vertical soil pressures on the back of gravel bag decrease by 3.6%~20.0% and 2.0%~7.9%, respectively. The grid strain, wall compression and wall horizontal displacement increase slightly. © 2020, Editorial Department of China Railway Science. All right reserved.
引用
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页码:1 / 10
页数:9
相关论文
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