Self-drilling prestress soil nail and construction method

Abstract

The invention relates to a self-drilling prestress soil nail which comprises a nail tip, a nail rod, spiral edges and spiral fin plates. An axle hole and at least two flow guide holes are formed in the back end surface of the nail tip, the nail tip is connected to a nail rod through the axle hole, a plurality of jet flow holes are uniformly formed in the front end surface and the side surface of the nail tip, the spiral edges are uniformly distributed on the outer surface of the nail tip around the axis of the nail tip, the nail rod is of a tubular structure coaxially distributed to the nail tip, the spiral fin plates are distributed on the outer surface of the nail rod in a spiral structure around the nail rod, at least two positioning holes are formed in the position of the side wall ofthe back end surface of the nail rod, and the axes of the positioning holes and the axis of the nail rod are distributed vertically. A construction method of the self-drilling prestress soil nail comprises three steps: construction parameter collection; soil nail positioning; grouting and strengthening and the like. The self-drilling prestress soil nail is simple in structure and flexible and convenient to use and has good environmental practicality and universality. In addition, the positioning stability and reliability in a geologic structure are improved greatly.

Description

technical field [0001] The invention relates to a self-drilling prestressed soil nail and a construction method, belonging to the technical field of civil engineering equipment. Background technique [0002] Soil nails are currently important equipment for strengthening and fixing slopes such as mountains, dams, and building foundation pits. They are used in a huge amount. However, in actual use, it is found that the soil nails currently used often need to be drilled by drilling equipment first. , and then embedded in the borehole and fixed by grouting. Although it can meet the needs of use, it is difficult to construct, low in efficiency and relatively high in construction costs. On the other hand, it also causes the connection between soil nails and address structures The stability is poor, and the positioning position and positioning accuracy are easily affected by geological structure deformation or external impact, which seriously affects the quality, construction effic...

AI Technical Summary

Problems solved by technology

[0002] Soil nails are currently important equipment for strengthening and fixing slopes such as mountains, dams, and building foundation pits. They are used in a huge amount. However, in actual use, it is found that the soil nails currently used often need to be drilled by drilling equipment first. , and then embedded in the borehole and fixed by grouting. Although it can meet the needs of use, it is difficult to construct, low in efficiency and relatively high in construction costs. On the other hand, it also causes the connection between soil nails and address structures Poor stability, it is very easy to seriously affect the positioning position and positioning accuracy due to geological structure deformation or external force impact, which seriously affects the quality, construction efficiency and construction cost of the current soil nailing construction work

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