Disc forming tool and multi-disc soil anchor prepared by using same

Abstract

The invention provides a disc forming tool and a multi-disc soil anchor prepared by using the same. The disc forming tool comprises an inner lining pipe which is arranged on the innermost layer of a disc forming tool body and plays a role in supporting the disc forming tool body; an air bag is arranged on the outer layer of the inner lining pipe in a sleeving mode, has the elasticity and is expandable in the radial direction of the inner lining pipe; and pressing plates are arranged on the outer surface of the air bag, convex blocks are arranged on the pressing plates, and the pressing plates expand in the radial direction of the inner lining pipe along with the air bag to move in the radial direction. The multi-disc soil anchor comprises a cylinder and a plurality of discs, wherein the multiple discs are annularly arranged on the outer surface of the cylinder at intervals. According to the disc forming tool, the air bag is inflated to push the pressing plates to expand in the radial direction, the convex blocks on the surfaces of the pressing plates are pressed into soil of a drilled hole, a plurality of disc cavities are formed through repeated operations such as air inflation and deflation, rotation, stretch and the like, cement paste is poured into the expanded drilled hole, after the cement paste is solidified into disc bodies, the soil facing surface of each disc body is subjected to the pressure effect of the passive soil, and finally the higher anchoring force can be obtained.

Description

technical field [0001] The invention relates to the field of soil layer anchor cable anchoring, in particular to a coil forming tool and a multi-disc soil anchor prepared by the coil forming 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 surfa...

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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