| 摘要 |
PURPOSE: A synthetic beam for bridge is provided to be cheap producing cost and to lengthen the lifetime of the bridge by having the excellent bending intensity and the tensile strength. CONSTITUTION: A supportive stair(17) is installed on the upper part of a bridge(16) installed by putting on a synthetic beam for bridge(10). The synthetic beam for bridge(10) is put on the upper part of the supportive stair(17), while a lower concrete(15a) to accept the lower side of the synthetic beam for bridge(10) is faced in the upper face of the supportive stair(17). The synthetic beam for bridge(10) is installed in a bridge(16) by combining the lower concrete(15a) in the supportive stair(17). When the installation of the synthetic beam for bridge(10), a mold for forming an upper concrete(15b) is installed having the upper concrete(15b) formed by pouring a concrete therein. When the poured concrete is hardened, a construction of the bridge is completed by completing an upper structure(10) with removing the mold and a finishing work such as an installation of driveway, pavement and rail in the upper part is constructed.
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