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首页> 外文会议>Geoshanghai international congress >Influence of Leveling Pad Interface Properties on Soil Reinforcement Loads for Walls on Rigid Foundations
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Influence of Leveling Pad Interface Properties on Soil Reinforcement Loads for Walls on Rigid Foundations

机译：找平垫界面特性对刚性地基墙体的土壤加固载荷的影响

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A verified numerical Fast Lagrangian Analysis of Continua (FLAC) code is used to investigate the influence of concrete- and granular-block interface properties on reinforcement loads in polyester geogrid reinforced soil (modular) block walls seated on a rigid foundation. A nonlinear interface model simulating interfaces between concrete blocks and concrete or granular soil leveling pads calibrated against laboratory direct shear tests is implemented within the FLAC code. The code is then used to simulate 3.6-, 6- and 9-m high block walls constructed in stages. The numerical results show that the increase in wall height during wall construction for the same wall increases the interface tangent stiffness. However, the concrete pad results in higher interface tangent stiffness compared to the granular soil pad case when other conditions are equal. For 3.6-m high walls, the load carried by the toe when using the granular soil leveling pad is 14% less than for the concrete pad case. For 9-m high walls the difference in load carried by the toe for the two different leveling pads is less than 10%. The predicted reinforcement loads at the same elevation over the bottom 1/3 of the wall height for the concrete pad case are smaller than those for the granular soil pad case but are similar over the remaining height of wall. The results also show that the predicted reinforcement loads using the K-stiffness Method capture the trend in numerical results for the two leveling pad conditions but are conservative (i.e. safer for design) particularly for the higher walls.
机译：经过验证的连续快速数值拉格朗日分析（FLAC）代码用于研究混凝土和颗粒块界面特性对位于刚性基础上的聚酯土工格栅加筋土（模块化）砌块墙体中钢筋荷载的影响。在FLAC代码中实现了一个非线性界面模型，该模型模拟了根据实验室直接剪切试验校准的混凝土块与混凝土或颗粒状土壤找平垫之间的界面。然后，该代码用于模拟分阶段建造的3.6、6和9 m高的砌块墙。数值结果表明，对于同一壁，在建造墙壁时壁高的增加会增加界面切线刚度。但是，与其他条件相同的情况相比，混凝土垫层与粒状土壤垫层的情况相比，界面切线刚度更高。对于3.6米高的墙，使用颗粒状土壤平整垫时，脚趾所承受的载荷比混凝土垫板情况要少14％。对于9米高的墙，两个不同的调平垫的脚趾所承受的负载差异小于10％。在混凝土垫板情况下，在墙高度的底部1/3处相同高度上的预测钢筋载荷小于颗粒土垫板情况，但在墙的其余高度上相似。结果还表明，使用K刚度法预测的钢筋载荷捕获了两种水平垫板条件下数值结果的趋势，但是是保守的（即设计更安全），特别是对于较高的墙。

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