Construction method of open-cut and concealed-buried tunnel under condition that foundation pit is provided with stand column: Fid-Bau Portal

Construction method of open-cut and concealed-buried tunnel under condition that foundation pit is provided with stand column

HOU JILIANG / GAO LIUPING / CHEN SHI

Abstract

The invention provides a construction method of an open-cut and concealed-buried tunnel under the condition that a foundation pit is provided with stand columns, and belongs to the field of tunnel construction.The open-cut and concealed-buried tunnel under the condition that the foundation pit is provided with the stand columns comprises an enclosure structure and is characterized in that an anti-precipitation reinforcing mesh is welded to the lower portion of the inner side of the enclosure structure; foundation piles are arranged between the anti-precipitation reinforcing meshes. A foundation pit is arranged between the enclosure structures; a side edge reinforcing frame structure is further arranged between the enclosure structures; a tunnel is arranged inside the foundation pit; a top beam is installed on the upper portion of the inner side of the enclosure structure through bolts. The arc-shaped fixing frames are matched with the inverted-V-shaped reinforcing frames and the longitudinal connecting frames, so that the stability during concrete pouring can be improved, and meanwhile, the bearing strength during treading from the upper side can be improved through the arc-shaped reinforcing beams.

本发明提供一种基坑有立柱情况下的明挖暗埋隧道的施工方法，属于隧道施工领域，该一种基坑有立柱情况下的明挖暗埋隧道，包括围护结构，其特征在于，所述的围护结构的内侧下部焊接有防沉淀钢筋网；防沉淀钢筋网之间设置有基桩；围护结构之间为基坑；围护结构之间还设置有侧边加强架结构；基坑内侧为隧道；围护结构的内侧上部螺栓安装有顶部横梁。本发明利用弧形固定架配合倒V型加强架以及纵向连接架能够增加浇筑混凝土时的稳定性，同时利用弧形加强梁能够增加从上侧踩踏时的承受强度。

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