| 摘要 |
PURPOSE: A road extension method is provided to extend a road simply using a designed precast concrete and to shorten a period of extension work. CONSTITUTION: The road extension method comprises the steps of manufacturing a precast concrete structure(30) by a preliminary design structure, excavating a portion of the existing banking part(10) to secure the ground for the concrete structure(30), tamping the footing ground, placing the concrete structure(30) on the footing ground(14), filling up an interval between the concrete structure(30) and a cutting plane(13) with soil, and connecting the top of the concrete structure(30) and the existing road(11), then paving.
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