Bolt forming tool and multiple-transverse-bolt soil anchor prepared with bolt forming tool

Abstract

The invention relates to a bolt forming tool and a multiple-transverse-bolt soil anchor prepared with the bolt forming tool. The bolt forming tool which is simple in structure and easy to realize is adopted for forming a plurality of bolt bodies on the surface of the soil anchor. The purpose is that the feature that the multi-transverse bolt earth facing face bears the action of passive earth pressure is adopted, the area of multi-transverse bolt accumulative earth facing faces is larger, and therefore higher anchoring force is obtained; in addition, the cement paste increment is small when bolts are increased, and the bolt forming tool is economic and applicable. In order to achieve the aim, the technical scheme is that the bolt forming tool comprises a hollow cylindrical metal tube, an engine, a speed reducer, a rotating shaft, a bevel gear, a chain wheel, a support base, a rising stroke limit switch, a descending stroke limit switch, a screw with a round nut, a metal block with internal threads and a fixing plate. The multiple-transverse-bolt soil anchor prepared by the bolt forming tool comprises a cylinder formed in the manner that a plurality of bolt cavities and boreholes are solidified by pouring cement slurry or cement mortar, multiple bolt bodies are located on the outer surface of the cylinder, a whole body is formed together with the cylinder, the bolt bodies are semi bolts, and the bolt cross section shape is semicircular.

Description

technical field [0001] The invention relates to the field of soil layer anchor cable anchoring, in particular to a bolting tool and a multi-horizontal bolt soil anchor prepared by using the bolting tool Background technique [0002] Soil anchors are widely used in engineering such as foundation pit enclosure and slope treatment. In the prior art, the construction of the anchor cable in the soil layer generally first drills holes and then puts steel strands or rebars, then pours cement slurry, and tensions the steel strands or rebars after the cement slurry solidifies. In order to obtain a larger anchoring force, it is usually chosen to increase the anchoring diameter or the anchoring length, but increasing the anchoring diameter will drastically increase the amount of cement slurry, which will lead to an increase in cost, and at the same time, the increase in the length of the anchoring section is limited. [0003] When the existing cement grout soil anchor works, the outer...

AI Technical Summary

Problems solved by technology

In order to obtain a larger anchoring force, it is usually chosen to increase the anchoring diameter or the anchoring length, but increasing the anchoring diameter will increase the amount of cement slurry drastically, resulting in an increase in cost, and at the same time, the increase in the length of the anchoring section is limited

[0003] When the existing cement grout soil anchor works, the outer surface is subjected to frictional resistance and cohesive force, and the pullout force is relatively small. Therefore, an enlarged head soil anchor is produced, and the soil facing surface of the enlarged head soil anchor is subjected to passive earth pressure. The larger the soil-facing area, the greater the anchoring force; however, due to the complex forming process of the enlarged head cavity and the consumption of a large amount of cement slurry in practical applications, it is not economical and not suitable for wide application

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