Construction method of elevation angle mortar anchor rod

Abstract

The invention discloses a construction method of an elevation angle mortar anchor rod, which comprises the following steps of: 1, drilling an anchor rod hole in a surrounding rock at an elevation angle, drilling to a set hole depth, then supplying air into the hole, and cleaning residual stone chips and stone powder in the drilled hole; secondly, an exhaust pipe is installed on one side of the anchor rod, and a grouting pipe is installed on the other side of the anchor rod; then, the anchor rod is fixed on the anchor rod through the fixing clip; holes are formed in the outer sides of the air inlet ends of the exhaust pipes to ensure air circulation in the exhaust pipes and anchor rod holes; and finally, positioning ribs are installed on the anchor rods. Thirdly, an anchor rod is inserted into the anchor rod hole, after the installation depth reaches the designed hole depth, the anchor rod is symmetrically clamped and fixed at an anchor rod hole opening through a wooden wedge, and the anchor rod is located in the center of the anchor hole; then, a cement anchoring agent is used for blocking the hole opening end of the anchor rod; and fourthly, after the blocked anchor rod hole stands for 24 h, grouting is conducted in the anchor rod hole. The problem of construction and installation of the elevation angle mortar anchor rod is successfully solved, and the defects of elevation angle anchor rod construction of a current anchor rod construction technology are overcome.

Description

technical field [0001] The invention relates to the technical field of surrounding rock reinforcement construction, in particular to a construction method of an elevation angle mortar bolt. Background technique [0002] The current anchor bolt construction and installation technology mainly uses the self-weight of cement slurry or mortar, and injects it into the anchor bolt hole through the grouting equipment without pressure, or sends cement anchoring agent into the anchor bolt hole, and then inserts the anchor bolt into the hole. The bonding effect of slurry, mortar and cement anchoring agent forms a whole between the anchor rod and the surrounding rock, so as to achieve the purpose of strengthening the surrounding surrounding rock. For the construction and installation of elevation anchors, using the current construction method, the anchoring material in the anchor hole cannot be retained in the hole due to its own weight, and affected by the insertion of the anchor, the ...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that in the prior art, the anchoring material in the anchor hole cannot be retained in the hole due to its own weight, and at the same time affected by the insertion of the anchor, it is impossible to ensure the effective filling of the anchor material in the anchor hole, and the formation of A large number of cavities, after the anchor bolt is installed, it cannot form a compact whole with the surrounding rock, and it cannot play the role of anchoring and supporting the surrounding rock, resulting in serious quality problems. Therefore, a construction method of an elevation angle mortar anchor is proposed.

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