Construction method of separated prefabricated small box girder steel wedge-shaped block: Fid-Bau Portal

Construction method of separated prefabricated small box girder steel wedge-shaped block

WANG CHUANJIE / LEI TING / WANG YAOWEI / LI ZHEYI / MEI MIN

The invention is applicable to the field of box girder construction, and provides a construction method of a separated prefabricated small box girder steel wedge block, which comprises the following steps of: placing a pre-embedded steel plate on the center of a corresponding support on a girder manufacturing pedestal while performing steel bar construction on a prefabricated small box girder, and welding and fixing the pre-embedded steel bar and the pre-embedded steel plate; selecting matched steel wedge-shaped blocks according to the gradient of longitudinal and transverse slopes of the prefabricated small box girder, and welding and fixing the steel wedge-shaped blocks and the pre-embedded steel plates; when the prefabricated small box girder is erected, after the center point of the steel wedge-shaped block is aligned with the center of the support cushion stone and the center of the support above the cover beam, installation can be completed. According to the invention, after the separation type scheme that the steel plates are pre-embedded in advance and then the steel wedge-shaped blocks are connected through welding is adopted, the construction quality is easier to guarantee, the utilization rate of the site and the beam making pedestal is improved, the construction efficiency is improved, and the project cost is saved to a certain extent.

本发明适用于箱梁施工领域，提供一种分离式预制小箱梁钢制楔形块施工方法，包括在预制小箱梁的钢筋施工同时，在制梁台座上对应的支座中心上放置预埋钢板，并采用预埋钢筋与预埋钢板进行焊接固定；按照预制小箱梁纵横坡的坡度选择匹配的钢制楔形块，并将钢制楔形块与预埋钢板焊接固定；在架设预制小箱梁时，使钢制楔形块的中心点与盖梁上方的支座垫石及支座中心对齐后，即可完成安装。本发明采用提前预埋钢板，再通过焊接连接钢制楔形块的分离式方案后，施工质量更易保证，提高了场地及制梁台座利用率，并调高了施工效率，在一定程度上节约了项目成本。

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