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中文摘要：
研究目的：随着我国经济与交通运输业的快速发展，加筋土技术将越来越多的应用在路堤的修建中，用来提高路堤的承载力与稳定性并控制路堤变形。本文对未加筋、水平加筋、立体加筋黏性土路堤边坡进行多组模型试验，主要研究不同加筋形式、立体加筋不同竖筋高度对路堤边坡极限承载力、坡顶竖向沉降、坡面水平位移、筋材受力与边坡破裂面形态的影响，探讨两种加筋形式路堤的工作机理和加固机制。研究结论：（1）采用立体加筋方式对提高边坡极限承载力，控制坡顶竖向沉降与坡面水平位移的作用比采用水平加筋方式效果明显；（2）随着立体筋材竖筋高度的增加，边坡的极限承载力随之提高，坡顶竖向沉降与侧向位移也随之减小；（3）在相同加筋层数和加筋位置情况下，水平加筋与立体加筋形式下的筋材拉力分布规律基本相同，但立体筋材所受的拉力比水平筋材的大，即立体筋材能更好地发挥筋材的承载能力；（4）不论是水平加筋还是立体加筋路堤，其破裂面形态不同于未加筋时的连续圆弧破裂带，而是被筋条隔断为多个圆弧面。新产生的圆弧破裂面曲率增大，作用位置也更靠近路堤中部；（5）该研究结论可为加筋路堤边坡的设计和施工提供参考和技术支持。
英文摘要：
Research purposes： With the rapid development of economy and transportation, the reinforced soil technology is applied more and more in filling embankment to improve the bearing capacity and stability of the embankment and control the deformation of embankment. Multi - group model tests are performed for unreinforced, horizontal reinforced and 3 - dimension reinforced cohesive soil embankment slope. The effects of different reinforcing form and the different height of vertical reinforcement on the slope ultimate bearing capacity, settlement at slope top, horizontal displacement at slope surface, stress distribution of reinforcement and fracture surface form of slope are studied. Both working and reinforcing mechanism are discussed for two reinforcing forms. Research conclusions： （ 1 ） For improving slope ultimate bearing capacity and controlling settlement at slope top and horizontal displacement at slope surface, the 3 -dimension reinforcing form is more advanced than the horizontal reinforcing one. （ 2 ） With the increasing of height of vertical reinforcement, the slope ultimate bearing capacity increases, and the settlement at slope top and the horizontal displacement at slope surface decrease. （3）With the same reinforcement layers and reinforcing location ,the rules of tension distribution in the two reinforced slopes arc similar, but the tension in the 3 - dimension reinforced slope is greater than that in the horizontal reinforced one, that means the bearing capacity of the former one can be used more completely. （4）The fracture surface forms of reinforced slope different from that of the unreinforced one. The fracture surface in reinforced slope is separated into several discontinuous arc bands by reinforcement band. The curvatures of the separated arc bands increase and their places approach the central part of embankment more and more. （5） The research conclusions can provide the reference and technical support for the design and construction of reinforced embankment slope.
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