Construction method of deep foundation pit under high slope condition: Fid-Bau Portal

Construction method of deep foundation pit under high slope condition

XU YUNFENG / LIN ZHITING / GUO ZIJIA

The invention relates to the technical field of foundation pit construction, discloses a construction method of a deep foundation pit under a high slope condition, and solves the technical problem that the deep foundation pit is difficult to safely construct under the high slope condition in the prior art. (2) enclosing, wherein the other side surface is a high slope; (3) earth excavation is conducted, and the pore sizes of all sections are different; (4) a supporting structure is arranged, and a concrete protection face is sprayed on the supporting structure; (5) rock nail construction is conducted in the soil layer on the concrete protective surface; (6) after the construction of the rock nails is completed, constructing a hanging net on the surface of the concrete protective surface and spraying concrete; (7) steel bars are bound on the inner side of the hanging net sprayed concrete; (8) erecting a template; (9) concrete is poured, a reinforced concrete supporting plate and a reinforced concrete inner support are constructed, and supporting construction of the section is completed; and (10) the steps (3)-(9) are repeated till construction is conducted to the bottom of the foundation pit. According to the technical scheme, the invention provides the construction method of the deep foundation pit under the high slope condition.

本发明涉及基坑施工技术领域，其公开了一种高边坡条件下深基坑的施工方法，解决了目前现有技术中的高边坡条件下深基坑难以安全施工的技术问题，包括如下步骤：(1)修筑小道；(2)围护，另一侧面即为高边坡；(3)土方开挖，且每节的孔径大小不同；(4)设置支护结构，在支护结构上喷射混凝土护面；(5)在混凝土护面向土层内进行岩钉施工；(6)岩钉钉施工完成后，在混凝土护面表面施工挂网喷射混凝土；(7)在挂网喷射混凝土的内侧绑扎钢筋；(8)模板搭设；(9)混凝土浇筑，施工钢筋混凝土支护板和钢筋混凝土内支撑，完成本节的支护施工；(10)重复步骤(3)‑(9)，直至施工到基坑底。根据以上技术方案，本发明提供一种高边坡条件下深基坑的施工方法。

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