Abstract：
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.
