底部槽型预制块路面水平阻力试验研究

Experimental Research on the Horizontal Resistance of Underside Shaped Interlocking Precast Block Pavement

为研究路面荷载等级要求较高场所中的预制块路面面层与砂垫层之间相互作用,对底部槽型预制块路面抵抗水平滑动的性能进行研究。利用液压千斤顶作用在反力架上,对预制块路面结构进行水平加载,试验研究不同砂垫层类型、砂垫层厚度和预制块类型等工况下预制块路面的水平阻力,提出用临界水平阻力f评价预制块路面抵抗水平滑动的能力。结果表明,在砂垫层掺入30%碎石后,预制块路面抵抗水平滑动的能力下降;较低厚度砂垫层的预制块路面抵抗水平滑动能力更好;底部槽型联锁预制块USB路面抵抗水平滑动的能力相比联锁预制块IB路面更好。

In order to study the interaction between precast block pavement surface and sand bedding layer in places with high pavement load rating requirements, the performance of bottom slotted precast block pavement to resist horizontal sliding was investigated. The hydraulic jack was used to act on the reaction force frame to horizontally load the precast block pavement. The experiment studied the horizontal resistance of the precast block pavement under different working conditions of different types of sand cushion, sand pad thickness and precast block type, and the critical horizontal resistance f was used to evaluate the ability of the precast block pavement to resist horizontal slip. The research results show that after the sand cushion layer is mixed with 30% gravel, the ability of the precast block pavement to resist horizontal sliding decreases, and the low-thickness sand cushion layer precast block pavement has better resistance to horizontal sliding, and the ability of the underside shaped interlocking precast block(USB) pavement to resist horizontal slip is better than that of the interlocking precast block(IB) pavement.