| 摘要 |
A concrete dowel slab joint system is provided for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs. It includes a sleeve assembly for receiving and maintaining the dowel bar therewithin. In this is way, the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. The sleeve assembly comprises an elongate sleeve body having an outer surface and an inner surface, and defines a hollow interior compartment, (b) at least one closed end, and (c) a sleeve member. Preferably, at least one collapsible spacer member is located within the hollow interior compartment. The spacer member is collapsible by interactive forces exerted by the dowel bar moving in a lateral and/or longitudinal path within the hollow interior compartment in response to the expansion and contraction of the concrete. The inner surface defines a hollow interior chamber. The longitudinal axis of the sleeve body is disposed substantially at a right angle with respect to the longitudinal axis of the sleeve member. The first sleeve assembly is mountable onto upright support stanchion so that each upright support stanchion is disposed within the hollow interior chamber. The concrete dowel slab joint system of the present invention can include a second sleeve assembly.
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