Combined foundation pit support structure and construction method: Fid-Bau Portal

Combined foundation pit support structure and construction method

QIAN ZHUOMING

The invention relates to the field of building construction, in particular to a combined type foundation pit support structure and a construction method. The combined type foundation pit support structure comprises a column array type retaining wall, and the column array type retaining wall is arranged in a rectangular shape; the concrete cofferdam is fixedly connected to the top of the column type retaining wall, and end heads at different intervals are symmetrically arranged on the inner wall of the concrete cofferdam; the multiple pieces of I-shaped steel are fixedly connected to the interiors of the column type retaining wall and the concrete cofferdam at equal intervals, and the top ends of the I-shaped steel are all exposed out of the top of the concrete cofferdam. According to the combined type foundation pit support structure and the construction method, the cement soil column type retaining wall is formed in a rotating hole pouring mode, the supporting components are connected through the concrete cofferdams with the ends, the construction efficiency is improved, meanwhile, supporting in the foundation pit is enhanced, the periphery of the foundation pit is not prone to collapse and deformation, and the construction period is shortened. And the foundation pit support structure is firmer during construction.

本发明涉及建筑施工领域，尤其涉及一种组合式基坑围护结构及施工方法。所述组合式基坑围护结构及施工方法包括柱列式挡墙，柱列式挡墙呈矩形设置；混凝土围堰固定连接在列式挡墙顶部，且混凝土围堰内壁对称设置有间隔不一的端头；工型钢设置有若干个，工型钢等距固定连接在柱列式挡墙和混凝土围堰内部，且工型钢顶端均裸露在混凝土围堰顶部。本发明提供的组合式基坑围护结构及施工方法，利用转孔浇筑的方式形成水泥土柱列式挡墙，在通过带有端头混凝土围堰连接支撑构件，提高施工效率的同时，增强基坑内部的支撑，让基坑四周不容易塌陷变形，让施工时基坑围护结构更牢固。

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