For the convenience of construction and improvement of road construction and based on traditional construction of inspection shaft and practical road construction method,single-layer base inspection shaft was changed into double-layer base inspection shaft which can be sleeve-connected.The height of exposed layer of the double-layer base is same as the double-layer asphalt concrete thickness of the road surface to realize synchronous construction of the inspection shaft and asphalt concrete road surface and to improve construction shaft,shorten construction period,save construction cost and realize environmental protection and energy saving.%为方便施工和提高道路施工水平,依据传统检查井产品作法,并结合实际道路施工方法,将单层支座的检查井改成可套接的双层支座检查井,双层支座的外露层高与道路面层双层沥青混凝土的层厚相同,从而检查井能和道路沥青混凝土面层保持同步施工,施工时可提高质量、缩短工期、节省费用和环保节能.
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