| 摘要 |
PURPOSE: An extension road is provided to establish extended road by sliding a segmented bottom plate at both side of a girder. CONSTITUTION: An extension road comprises a file(120), a girder(140) and a segmented bottom plate(160). The file is inserted in the ground along roadside at a regular interval. The girder is installed on a plurality of files in order to extend along roadside. The segmented bottom plate is installed on the girder. A rail(143), extended in the longitudinal direction, is installed in the upper side of girder. A rail guide(162) is installed on the bottom surface of the segmented bottom plate and meshed with the rail. The segmented bottom plate slides on the girder. |
