Anchoring and shotcreting support construction method in foundation pit construction

Abstract

The invention relates to an anchoring and shotcreting support construction method in foundation pit construction. The anchoring and shotcreting support construction method in foundation pit construction adopts a following anchoring and shotcreting support structure in foundation pit construction. The anchoring and shotcreting support structure in foundation pit construction comprises upper supporting plates, inserting rods, inclined supporting rods, supporting mechanisms and laminated plates. The anchoring and shotcreting support construction method in foundation pit construction by adopting the anchoring and shotcreting support structure in foundation pit construction comprises the following steps that S1, a working face is excavated; S2, mortar spraying is conducted on bottom-layer concrete; S3, soil nails are placed; S4, the upper supporting plates are positioned; S5, supporting plates are placed; S6, an anchor net is laid; and S7, mortar spraying is conducted on a surface layer. Through the anchoring and shotcreting support construction method, the problems existing during existing anchoring and shotcreting support construction that the locking effect of the soil nails throughconnecting rods is poor, consequently, integrality of the soil nails is poor, the supporting effect of the anchoring and shotcreting support structure on the side wall of a foundation pit is affected,anchor net laying operation is tedious, and the anchor net is prone to folding or bending can be solved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for anchoring and shotcreting support in foundation pit construction. Background technique [0002] Anchor shotcrete support is a soil retaining structure used to maintain the stability of the side wall or slope of the foundation pit during soil excavation. The grout effect anchor net, the reinforced concrete surface layer adhered to the soil surface, and the anchor shotcrete support make the side of the foundation pit form a self-stabilizing retaining wall. [0003] During the construction of anchor shotcrete support, it is necessary to open a drill hole on the side wall of the foundation pit first, then insert the soil nail into the drill hole, and seal the drill hole with concrete, and then use the connecting rod to lock the soil nail in the hole. At the same time, the anchor mesh is laid on the outside of the soil nails. After the anchor m...

AI Technical Summary

Problems solved by technology

[0004] 1. The locking effect of the connecting rod on the soil nail is poor, resulting in poor integrity of the soil nail, thus affecting the support effect of the anchor spray support structure on the side wall of the foundation pit;

[0005] 2. When the anchor net is laid, it is necessary to manually flatten the anchor net. Due to the influence of soil nails and connecting rods, the laying operation of the anchor net is cumbersome, and the anchor net is prone to wrinkles or bends.

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