Gap exists in the interface of cement asphalt emulsion mortar and CRTS I track slab universally, which is more severe at four corners than other parts of the track slab. In this work, the temperature and elevation of CRTS I slab track with and without rail were measured continuously to study the influence mechanism of rail on the gap. The results show that the alternating temperature gradient of track slab is the main reason that causes the gap, and laying rail can efficiently decrease the gap size in the slab track without rail. Compared with the slab track without rail, the maximum elevation occurred at the corner, the maximum gap width and the maximum gap depth of the slab track with rail laid were decreased by 0.45 mm (25.7%), 0.75 mm (46.6%) and 9.5 mm (59.4%), respectively; meanwhile, the disqualification ratio at corners was reduced to 5.9%, which is 50% less than that of the track without rail. When elevation mismatch occurs in adjacent track slabs, a gasket should be placed at rail-bearing bed below the track slab in order to avoid the lower slab being dragged up by the higher slab and the further occurrence of new gap.

中文翻译：

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CRTS I平板轨道板与水泥沥青砂浆层间隙的试验研究。

水泥沥青乳液砂浆和CRTS I履带板的界面普遍存在间隙，这在四个角处比履带板其他部分更严重。在这项工作中，连续测量CRTS I平板轨道在有轨和无轨情况下的温度和高度，以研究轨对间隙的影响机理。结果表明，轨道平板的交替温度梯度是造成间隙的主要原因，铺设轨道可以有效减小无轨道平板轨道的间隙尺寸。与不带轨道的平板轨道相比，最大仰角发生在拐角处，带轨道的平板轨道的最大间隙宽度和最大间隙深度分别减少了0.45 mm（25.7％），0.75 mm（46.6％）和9.5。毫米（59.4％）; 同时，转弯处的失格率降低到5.9％，比没有轨道的轨道少50％。当相邻轨道板之间发生高度不匹配时，应在轨道板下方的轨道支承床处放置垫片，以免下部板被较高的板拉动，并避免出现新的间隙。