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| Model Experimental Research on the Reinforced Embankment Slope under Strip Load |
| MA Xue-ning1，WANG Fei2 , WANG Xu1，WANG Bo-lin1 |
| 1 .Lanzhou Jiaotong University，Lanzhou，Gansu 730070，China;2. Shaanxi Railway Institute，Weinan，Shaanxi714000，China |
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Abstract 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 are bands by reinforcement band. The curvatures of the separated are 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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Received: 27 May 2015
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2015, Vol. 32 
