Pore submersible deep foundation pit self-drilling type anchor rod construction method

Abstract

The invention provides a pore submersible deep foundation pit self-drilling type anchor rod construction method, belongs to the technical field of self-drilling type anchor rod construction. Aiming atthe geology with large water content and large void ratio, the self-drilling type anchor rod construction is adopted, hole collapse can be effectively prevented, the bonding strength of cement pasteand hole wall rock mass can be guaranteed, anti-sliding force can be actively provided, displacement of a rock body is effectively controlled, a sub-stress zone is generated within the anchoring rangeof an anchor rope, and therefore, the mechanical property of the rock body can be fundamentally improved, various special drill bits matched with the self-drilling anchor rod are can be suitable forvarious stratums, a high-strength coupling sleeve processed by a mechanical cutting process is adopted, and the self-drilling type anchor rod has the characteristic of being lengthened while drilling,so that the self-drilling anchor rod can be used for constructing a longer anchor rod in a narrow construction space, grouting is convenient and compact, and the anchoring strength is increased. Compared with common anchor rod construction, for the method disclosed by the invention, the construction cost can be greatly reduced, energy is saved, emission is reduced, and environment-friendly construction is facilitated.

Description

technical field [0001] The invention belongs to the technical field of self-drilling bolt construction, and in particular relates to a self-drilling bolt construction method for submerged deep foundation pits. Background technique [0002] Pore ​​submerged deep foundation pit self-drilling anchor construction method is a kind of self-drilling anchor rod drilling and grouting in the pore submerged deep foundation pit, and through the hole grouting consolidation, part of the grout will penetrate into the surrounding area under pressure. Rock fissures, the consolidated surrounding rock forms a whole, so that the surrounding rock mass within a certain thickness range forms a "bearing ring" construction method. Wherein, the outer end of the anchor cable is fixed to the concrete pile body, and the other end is anchored in the stable rock mass. The prestress of the anchor cable makes the unstable soil in a state of high confining pressure and the structural surface is in a compact...

AI Technical Summary

Problems solved by technology

This often takes a long time and the survey cost is high, and due to the limited number of points, it is impossible to drill holes everywhere, so it is impossible to perform better construction.

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