| 李元昊,罗强*,梅明明,张良,蒋良潍.刚性面板肋板式挡墙砂箱模型试验[J].实验力学,2020,35(5):877~885 |
| 刚性面板肋板式挡墙砂箱模型试验 |
| Sandbox model experiment of rigid panel ribbed slab retaining wall |
| 投稿时间：2019-05-06 修订日期：2019-06-18 |
| DOI：10.7520/1001-4888-19-078 |
| 中文关键词: 肋板式挡墙 刚性面板 砂箱模型 破坏模式 约束系数 |
| 英文关键词:ribbed slab retaining wall rigid panel sandbox model failure mode constraint coefficient |
| 基金项目:国家自然科学基金项目(51878560)资助 |
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| 摘要点击次数: 367 |
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| 中文摘要: |
| 肋板式挡墙是一种新型的轻型支挡结构，其主要构件包括挡墙面板和肋板。本文开展了以有机玻璃作为刚性面板、硬纸板作为肋板的小型砂箱模型试验，研究了肋板长度和布置间距对挡墙稳定性的影响规律，通过引入反映挡墙肋板对墙后土体约束能力的约束系数ξ=肋板长度l/肋板间距δ，讨论了肋板布置疏密程度与挡墙破坏模式的关系，分析了极限稳定状态下所需肋板面积随布置间距的变化趋势。试验表明，按肋板数量等分面板，将肋板布置于每个等分段中线处的布置方法，即“等分面板中线布置法”可获得更高的墙体稳定性，为目前最合理的布置方式；随ξ增大，肋板约束土体能力相应增强，模型挡墙破坏模式由摩擦锚固型(ξ<0.64)逐渐转变为整体土墙型(ξ>0.96)；刚性面板条件下，采用“长肋疏布”的摩擦锚固型设计原则较“短肋密布”的整体土墙型所需肋板面积小，具有更好的经济性。 |
| 英文摘要: |
| The ribbed slab retaining wall is a new type of light retaining structure, constituted by the wall panel and the ribbed slab. A model experiment of small sand box with rigid plexiglass panel and cardboard ribbed slab is carried out, and the influence of rib length and arrangement spacing on the stability of retaining wall is studied. By quoting the constraint coefficient ξ=l/δ with l the rib length and δ the rib spacing, the relationship between the rib layout density and the failure mode of the retaining wall is discussed as well. Besides, the variation trend of the required rib area with the rib spacing at critical stable state is analyzed. The result shows that, when the panel is equally divided based on the number of ribs, and the ribs are arranged at the midline of each equal segment, this kind of “equal-panel-midline-layout method” can get higher wall stability, recognized as the most reasonable arrangement. With the increase of ξ, the rib restraint capacity is correspondingly enhanced, and the retaining wall model failure mode gradually changes from friction anchoring type (ξ<0.64) to whole soil wall type (ξ>0.96). Based on the rigid panel condition, the ribbed slab retaining wall with the principle of “long rib sparsely distributed” is better than the “short rib densely distributed” as it needs less rib area and has better economical efficiency. |
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