Anticorrosive anchor rod capable of preventing slurry from leaking

Abstract

The invention discloses an anticorrosive anchor rod capable of preventing slurry from leaking. The anchor rod comprises a rod body, wherein the rod body is sleeved with a sleeve bag; one end of the rod body is extended out of a sleeve bag opening, and an area section of the rod body, which is inserted into a drill hole, is packaged by the sleeve bag; and a sleeve pipe is sleeved on the sleeve bag and is positioned on one side of the sleeve bag close to the sleeve bag opening. The slurry is compactly injected into the sleeve bag on an anchoring section, so that the filling compaction requirement of the anchoring section of the anchor rod can be met, all-around overflow of cement slurry on the anchoring section under the action of slurry injection pressure is prevented, and the control over slurry injection project amount and the economization of construction cost are facilitated; a free section of the anchor rod is protected by a corrugated sleeve, so that the free section can pass through an orifice to crush a rock-soil area, the reduction in severe slurry leakage risks of the anchor rod in a rock-soil crushing area is facilitated while the thickness of a steel bar concrete slurry protective layer is ensured, and the economization of the construction cost is facilitated; and simultaneously, the free section is subjected to secondary slurry injection, so that the free section of the anchor rod can be provided with a plurality of anticorrosive structural layers, and the anchor rod is high in corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering anchoring, and in particular relates to a slurry-leakage-proof and corrosion-proof bolt. Background technique [0002] At present, in the construction of construction, transportation, mining and water conservancy projects, a large number of technical problems of slope anchoring are often involved. Permeable rock and soil is a very difficult work object in anchoring technology, such as sandy soil layer, gravel layer, accumulation body, etc., its internal structure is loose and contains a lot of voids, and the cement slurry is easy to drill in the bolt hole. Loss, which in turn affects the quality and durability of the anchoring project. In some large-scale broken rock and soil landslide control projects, the prestressed anchor usually has to pass through the broken rock and soil, and the anchorage section is extended into the rock mass with a relatively complete structure, and the...

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Problems solved by technology

[0004] The Chinese patent with the publication number CN 100575615C proposes a multi-section bag-type extrusion anchor, which includes an anchor body fixedly connected to the guide head at one end, wherein a tubular fabric bag is placed outside the anchoring section of the anchor body. The diameter of the fabric bag is 5 cm to 10 cm larger than the diameter of the anchor bolt hole; the lower port of the fabric bag located at the guide head is directly tied with the anchor rod body with a tie, and the upper port of the fabric bag is tied with a tie and the grout inserted into it. The pipe and the anchor rod body are tied tightly; the cement slurry or cement mortar is poured through the grouting pipe in the fabric bag, which can avoid the main reinforcement from sinking into the soil during the process of placing the main reinforcement after the drilling is completed, and the cement slurry cannot completely cover the main reinforcement. The situation; this technical method can increase the contact area between the grouted anchor rod and the soil, and effectively improve the pullout resistance of the anchorage section of the anchor rod; There are more gaps under the anchor rod, which affects the durability and pullout resistance of the anchorage section; at the same time, this technology fails to solve the problems of slurry leakage and corrosion resistance in the free section of the anchor rod

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