同济大学学报（自然科学版）2025，Vol.53Issue(3)：338-347,10.DOI:10.11908/j.issn.0253-374x.23279
土工合成材料加筋土桥台变形特性的离心模型试验
Centrifugal Model Tests Deformation Characteristics on of Geosynthetics Reinforced Soil Abutment
摘要
Abstract
Five centrifugal model tests were conducted to investigate the deformation characteristics of geosynthetics reinforced soil(GRS)abutment under service conditions.The setback distance(i.e.,the distance from the beam seat to the inner of the facing)and beam seat width were considered as two influencing factors.The GRS abutment was loaded through multi-stage loading in centrifugal field.Test results indicate that the deformation of the GRS abutment is closely related to the setback distance and the beam seat width.The deformation decrease as the setback distance increases,there exists an optimal setback distance,beyond which the effect on controlling the abutment deformation becomes minimal.The deformation increase as the beam seat width increases under the same load.In addition,the maximum reinforcement strain decreases as the setback distance increases,and increases as the beam seat width increases.At each reinforcement layer,the maximum strain occurs below the beam seat and gradually transitions toward the setback area along the facing.Additionally,the peak strain at each reinforcement layer also decreases from top to bottom.The volumetric strain of GRS abutments in all tests is less than 0.15%,and the assumption of"zero volumetric strain"can still be used for GRS abutments.There is a significant deviation between the calculated values of the maximum horizontal displacement given by the existing specification and the measured values,which cannot well reflect the influence of setback distance and beam seat width,indicating the need for further optimization.The results can provide references and basis for the design of GRS abutments and the formulation of relevant specifications.关键词
加筋土桥台/变形特性/离心模型试验/土工合成材料Key words
reinforced soil abutment/deformation characteristics/centrifugal model test/geosynthetics分类
土木建筑引用本文复制引用
王清明,徐超,沈盼盼,赵崇熙,李格烨..土工合成材料加筋土桥台变形特性的离心模型试验[J].同济大学学报（自然科学版）,2025,53(3):338-347,10.基金项目
国家自然科学基金(42002270,41772284) （42002270,41772284）
