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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2017  >  17(6): 28-35
ZHANG Wan, XU Qiang, CHEN Jian-feng, XUE Jian-feng. Distribution and zoning of reinforcement loads for reinforced soil slopes[J]. Journal of Traffic and Transportation Engineering, 2017, 17(6): 28-35.
Citation: ZHANG Wan, XU Qiang, CHEN Jian-feng, XUE Jian-feng. Distribution and zoning of reinforcement loads for reinforced soil slopes[J]. Journal of Traffic and Transportation Engineering, 2017, 17(6): 28-35.
shu

Distribution and zoning of reinforcement loads for reinforced soil slopes

  • 1.

    School of Civil Engineering, Tongji University, Shanghai 200092, China

  • 2.

    State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China

  • 3.

    Geotechnical and Hydrogeological Engineering Research Group, Federation University Australia, Churchill 3842, Victoria, Australia

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    Abstract
  • Based on the result of centrifuge model test, the finite element models of reinforced soil slopes with different slope heights and angles were established.The maximum reinforcement loads in the slopes were calculated by using the strength reduction method when the safety factor was 1.30.The influence of slope height and angle on reinforcement load distribution along the height was analyzed by normalizing reinforcement load and slope height.Furthermore, thedistribution and zoning of reinforcement loads were discussed by combining with the measured reinforcement loads of field reinforced soil slopes.Analysis result shows that the computed location and shape of slope sliding surface and the safety factor at slope failure are in agreement with the centrifuge model experiment results.The distribution of reinforcement load is little influenced by slope height, whereas greatly influenced by slope angle.With the increase of slope angle, the location of maximum reinforcement load transfers from the mid height to the bottom of slope.According to the total distribution of reinforcement loads, the sums of maximum loads in reinforcement layers within the top 1/3 and the bottom 2/3 of slope account for 1/4 and 3/4 of total reinforcement tensile force, respectively.The upper part of slope requires less reinforcement loads.If using one zone method that assumes a uniform reinforcement load distribution along slope height to distribute total reinforcement tensile force, the lower degree of safety of slope will decrease.The total reinforcement tensile force of reinforced soil slopes can be distributed into zones according to slope angle. When the slope angle is no more than 1.0∶1, the total reinforcement tensile force can be distributed into three zones with equal height. The reinforcement tensile force within the top, middle and bottom zones account for 1/3, 1/2 and 1/6 of total reinforcement tensile force, respectively.When the slope angle is in the range from1.0∶1 to 2.0∶1, its upper 1/3 of height is regarded as top zone, and the bottom 2/3 of height is regarded as bottom zone.The reinforcement tensile force within the top and bottom zones account for 1/5 and 4/5 of total reinforcement tensile force, respectively.When the slope angle is no less than 2.0∶1, it can be also divided equally into three zones.The reinforcement tensile forces within the top, middle and bottom zones account for 1/6, 1/3 and 1/2 of total reinforcement tensile force, respectively. More measured data can be collected to enrich the database of reinforcement loads, so that the zoning method of reinforcement tensile force according to slope angle for reinforced soil slopes can be further completed and validated.

     

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