加筋土路基在我国交通建设领域应用广泛。陕西省在八九十年代将其广泛应用于国道、省道的建设。工程运营多年来，长期处于交通荷载、结构蠕变、排水不畅等复杂作用下，工程质量日益衰减，甚至酿成灾难。为明确加筋土路基工程质量衰减机制，指导其运营期科学管理和预防性养护工作，开展运营期工程效果后评价研究工作十分必要。本文以延安市境内G210国道、S205、S206省道沿线10余处加筋土路基工程为研究对象，通过现场调查、理论分析、室内试验及数值模拟等方法，对运营期加筋土路基工程效果进行综合后评价研究。研究成果如下： （1）通过现场调查，研究区加筋土路基变形破坏可分为筋带断裂、拉出，链接件锈蚀破坏、面板整体或局部掉落等5种类型；发现个别工程在运营中存在的面板底部堆积大量生活垃圾、修缮维护力度不够、面板植被茂盛等不良现象。 （2）开展室内筋土界面剪切试验，研究发现筋土界面强度随着填土含水率的增加呈减小趋势；取活动区与嵌固区的临界点为坐标原点，基于筋带布设长度方向上的应力分布规律，引入筋带变形量与时间的关系，分别从筋带应变和加筋结构体面板变形建立了加筋土结构蠕变耐久性评估标准，并以镰刀湾加筋土路基工程为例完成计算，基于ABAQUS有限元软件模拟计算了不同土工带蠕变率下运营0年、5年、10年和15年后面板侧向位移、填土表面的沉降和筋带拉力的变化及分布规律，进一步明确了工程规模、面板应变、排水效果、运营时间、维护与修缮等多个评价指标的重要性。 （3）以调查区镰刀湾加筋土路基工程为原型，设计室内模型试验，得出了各级静载作用下填土、面板及格栅的应力应变分布规律；并结合现场调查现状，指出荷载强度对加筋土路基工程破坏的影响程度；基于ABAQUS有限元分析软件，反演了静力模型试验，验证了静力模型试验的适用性；持续路基模型的长期监测，进一步揭示了加筋土路基工程模型在完成填筑、完成加载、加载30d、90d、180d、1a共计6个关键时间点的应力应变分布规律，结合长期监测结果深入探讨了调查区多个工程点运营多年后出现面板变形过大这一典型病害的潜在机制，进一步确定了荷载强度、运营时间及面板应变作为加筋土路基工程效果后评价的关键指标。 （4）开展动三轴试验，分别从轴向累积应变、滞回曲线、骨干曲线、加筋单元体变形4个层面研究荷载强度及土体含水率（排水效果）两大因素对加筋单元体强度的潜在退化机制，并指出荷载强度、土体含水率（排水效果）对加筋单元体长期工作性能的影响较大且极易引起工程变形失效，应作为加筋土路基工程效果后评价的关键指标。 （5）汇总前述工作所获取的各类评价指标，筛选出6项关键评价指标用于综合评价，即工程规模、面板应变、运营时间、荷载强度、排水效果、维护与修缮。基于属性识别理论建立加筋土路基工程效果综合后评价模型并定义评价等级，引入熵权理论确定各评价指标权重，构建并计算单指标测度函数表及综合属性测度，完成属性识别，实现研究区内8处加筋土路基工程效果综合后评价。

Reinforced soil roadbed is widely used in the field of traffic construction in China. In the 1980s and 1990s, Shaanxi Province used it extensively in the construction of national and provincial roads. For many years, the engineering operation has been under the complicated effects of traffic load, structural creep and poor drainage. The quality of the project has been declining and even caused disaster. In order to clarify the quality attenuation mechanism of reinforced soil roadbed engineering, and to guide its scientific management and preventive maintenance work during the operation period, it is necessary to carry out post-evaluation research work in the operation period. In this paper, more than 10 reinforced earth roadbed projects along the G210 national highway, S205 and S206 provincial highways in Yan'an City are studied. Through field investigation, theoretical analysis, laboratory test and numerical simulation, the effect of reinforced soil roadbed engineering during operation period is studied. Conduct a post-comprehensive evaluation study. The research results are as follows:: （1）Through on-the-spot investigation, the deformation and damage of the reinforced soil roadbed in the study area can be divided into five types: rupture, pull-out of the ribs, corrosion damage of the link parts, and overall or partial drop of the panel. It is found that the bottom of the panel exists in the operation of individual projects. Poor phenomena such as domestic garbage, insufficient maintenance and repair, and lush vegetation on the panel. （2）The shear test of indoor reinforced soil interface was carried out. It was found that the interface strength of the reinforced soil decreased with the increase of the water content of the fill; the critical point of the active area and the embedded area was taken as the coordinate origin, based on the length direction of the ribs. The law of stress distribution, the relationship between the deformation of the band and the time is introduced. The creep durability evaluation standard of the reinforced soil structure is established from the strain of the band and the deformation of the reinforced structure. The reinforced soil roadbed engineering of the Bay of the Bay is taken as an example. Completion calculation, based on ABAQUS finite element software simulation, calculated the lateral displacement of the panel, the settlement of the fill surface and the tensile force of the ribbed belt after 0, 5, 10 and 15 years of operation under different creep rates of geotechnical belts. It further clarifies the importance of multiple evaluation indicators such as project scale, panel strain, drainage effect, operation time, maintenance and repair. （3）Based on the model of the reinforced soil roadbed in the survey area, the indoor model test was designed. The stress and strain distribution of the fill, panel and grating under the static load were obtained. Combined with the field investigation, the load strength was pointed out. The degree of damage of reinforced soil roadbed engineering; based on ABAQUS finite element analysis software, the static model test was inferred, and the applicability of static model test was verified. The long-term monitoring of continuous roadbed model further revealed the reinforced soil roadbed engineering. The stress-strain distribution of the model at the six key time points of filling, loading and loading 30d, 90d, 180d and 1a is completed. Combined with the long-term monitoring results, the panel deformation is too large after many years of operation in the survey area. The potential mechanism of this typical disease further determines the load strength, operating time and panel strain as key indicators for post-evaluation of reinforced soil roadbed engineering. （4）The dynamic triaxial test was carried out to study the load strength and soil moisture content (drainage effect) from the axial cumulative strain, hysteresis curve, backbone curve and reinforced unit body deformation to the strength of the reinforced unit. Potential degradation mechanism, and pointed out that the load strength, soil moisture content (drainage effect) has a great influence on the long-term performance of the reinforced unit body and it is easy to cause engineering deformation failure. It should be used as a key indicator for the post-evaluation of the reinforced soil roadbed engineering effect. （5）Summarize the various evaluation indicators obtained in the above work, and select six key evaluation indicators for comprehensive evaluation, namely project scale, panel strain, operation time, load strength, drainage effect, maintenance and repair. Based on attribute recognition theory, the post-evaluation model of reinforced soil roadbed engineering effect is established and the evaluation grade is defined. The entropy weight theory is introduced to determine the weight of each evaluation index. The single index measure function table and comprehensive attribute measure are constructed and calculated, and the attribute identification is completed to realize the study area. The comprehensive evaluation of the effect of the 8 reinforced soil roadbed works.