A kind of anchor rod with skeleton expansion body

Abstract

The invention discloses an underreamed anchor with a framework. A slurry injecting pipe and a slurry discharging pipe are installed at the rear end of an anchor body through an upper hoop. The lower side of the upper hoop of the anchor body is connected with a steel cylinder downwards. The circumferential wall of the steel cylinder is provided with an interlayer channel which is sealed upwards and opened downwards. A sleeve type piston is installed at the lower end of the steel cylinder. The upper half portion of the piston slides vertically and is inserted into the interlayer channel in a matched and sealed mode. A fixing ring is installed on a lower hoop at one end of a head guard. Eight evenly-distributed pin shafts are installed on the periphery of the upper end of the fixing ring. Eight evenly-distributed pin shafts are installed on the periphery of the lower end of the piston. Each upper pin shaft and each lower pin shaft are each provided with a guiding orientation frame capable of rotatably stretching outward by 90 degrees. An expanded rod is installed between each upper guiding orientation frame and the corresponding lower guiding orientation frame through pin shafts in a connected mode. A tee joint communicated with the interlayer channel of the steel cylinder is installed on the slurry injecting pipe and below the upper hoop. The pulling resistance can range from 600 KN to 1200 KN.

Description

[0001] Technical field: [0002] The invention relates to an expanded anchor rod with a skeleton used in the reinforcement of a large-scale building foundation. [0003] Background technique: [0004] The existing integrated double-capsule expanding body anchor rod is installed on the anchor rod with a positioning head guard at the front end, and a pair of compression hoops are respectively used to fix a bladder at both ends. The diameter of the bladder bag on the rod body at the head guard end is and the sealing bag whose length is greater than that of the other end, a grouting pipe is installed on one side of the clip outside the pressure hoop at both ends of the sealing bag, and a grouting pipe is installed on the other side. A blasting valve is installed in the body bag, a water-air separation filter valve is installed between the two bags on the grout discharge pipe, and a one-way grouting valve is installed on the grouting pipe in the sealing bag. Both pouches are made o...

AI Technical Summary

Problems solved by technology

Although this structure improves the pullout strength and sealing quality of the anchor, it is found in practice that the maximum pullout strength does not exceed 600KN, and it is not suitable for the reinforcement of large building foundations with a pullout strength exceeding 600KN.

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