Side slope excavation pre-anchoring supporting structure, side slope excavation supporting structure and construction method: Fid-Bau Portal

Side slope excavation pre-anchoring supporting structure, side slope excavation supporting structure and construction method

ZHU ANLONG

Abstract

The invention provides a side slope excavation pre-anchoring supporting structure, a side slope excavation supporting structure and a construction method, the side slope excavation pre-anchoring supporting structure comprises a side slope rock body, a first anchor rod hole is drilled in the side slope rock body, and a detachable anchor rod is installed in the anchor rod hole; the detachable anchor rod sequentially comprises an anchor rod supporting section, an anchor rod detaching section and a plurality of anchor rod extending sections. The anchor rod supporting section is located at the bottom of the anchor rod hole, the anchor rod dismounting section is used for connecting the anchor rod supporting section and the anchor rod extension sections, and the total length of the anchor rod dismounting section and the multiple anchor rod extension sections is equal to the thickness of a slope rock body needing to be excavated out; and the anchor rod holes are grouted and solidified after the anchor rod extension sections and the anchor rod disassembly sections are disassembled, so that the slope excavation pre-anchoring supporting structure is formed. According to the method, the deep rock mass, needing to be reserved, of the slope is pre-supported before excavation, the stability in the slope excavation process can be improved, and the method has very important significance for improving the operation safety after slope excavation and before permanent anchoring construction.

本发明提供一种边坡开挖预锚固支护结构、边坡开挖支护结构及施工方法，所述边坡开挖预锚固支护结构包括边坡岩体，所述边坡岩体上钻设第一锚杆孔，所述锚杆孔内安装可拆卸锚杆；所述可拆卸锚杆依次包括锚杆支护段、锚杆拆卸段和多段锚杆延长段；所述锚杆支护段位于锚杆孔底部，所述锚杆拆卸段用于连接锚杆支护段和锚杆延长段，所述锚杆拆卸段以及多段锚杆延长段的总长度等于需要挖除的边坡岩体的厚度；所述锚杆孔在多段锚杆延长段、锚杆拆卸段拆除后灌浆固结以形成边坡开挖预锚固支护结构。本发明在开挖前对边坡需要保留的深部岩体进行预支护，可以提高边坡开挖过程中的稳定性，对提高边坡开挖后、永久锚固施做前的作业安全具有十分重要的意义。

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