CAJ | 학술논문

设计并制作半挖半填工况的绿色加筋格宾模型挡墙,通过在挡墙顶部施加分级均布荷载,测试挡墙在各级荷载作用下的变形、土压力和筋材拉应变,并进行数值模拟,探讨挡墙承载力的发展规律和失稳模式;基于塑性极限分析的上限法,建立半挖半填工况加筋土挡墙的极限承载力,安全系数和极限高度的计算方法.研究表明:在墙顶分级均布荷载作用下,半挖半填工况加筋土挡墙承载力的发展过程可分为初始压密、正常发展、屈服和破坏失稳4个阶段;挡墙墙顶竖向沉降呈三角形分布,挡墙沿填挖交界面发生滑移失稳;挡墙面墙变形、土压力和筋材拉应变分布规律受挡墙的失稳模式影响;所推导的半挖半填工况加筋土挡墙稳定性分析方法考虑台阶面筋材的作用,具有较高的精度.
설계병제작반알반전공황적록색가근격빈모형당장,통과재당장정부시가분급균포하재,측시당장재각급하재작용하적변형、토압력화근재랍응변,병진행수치모의,탐토당장승재력적발전규률화실은모식;기우소성겁한분석적상한법,건립반알반전공황가근토당장적겁한승재력,안전계수화겁한고도적계산방법.연구표명:재장정분급균포하재작용하,반알반전공황가근토당장승재력적발전과정가분위초시압밀、정상발전、굴복화파배실은4개계단;당장장정수향침강정삼각형분포,당장연전알교계면발생활이실은;당장면장변형、토압력화근재랍응변분포규률수당장적실은모식영향;소추도적반알반전공황가근토당장은정성분석방법고필태계면근재적작용,구유교고적정도.
A green reinforced gabion earth retaining wall model in the cut-and-fill condition was designed and made. Its deformation,earth pressure and tensile strain of reinforcements were tested by applying hierarchical uniform loads on the wall top,combined with numerical analysis,its bearing capacity development rule and failure model were analyzed. Based on upper-bound method of plastic limit analysis,the calculating formulas for ultimate bearing capacity,safety factor and limit height of reinforced earth retaining wall in the cut-and-fill condition were obtained. The results show that,under the hierarchical uniform loads,its bearing capacity development process can be divided into initial compaction,development,yield and failure stage. The distribution form of wall top vertical settlement is triangular;and sliding instability appears along the cut-and-fill interface. The distribution law of earth pressure,deformation and tensile strains of reinforcements are affected by the failure model. The provided stability analysis method has high precision which considered the effect of reinforcements on steps.