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Sand-filling one-step-forming enlarged anchor pile construction method and device therefor

A technology of bolt construction and sand injection, which is applied in the installation of bolts, earth-moving drilling, mining equipment, etc. The effect of quality, few procedures, and fast construction speed

Inactive Publication Date: 2010-04-14
HEILONGJIANG HUAYAN PILING TECH R & D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional method of anchor bolts used in building foundation pit support is to pre-form holes, install anchor reinforcement bars, and then inject grout into anchor bolts. This construction method has many procedures and the quality is not easy to guarantee, especially for anchors with water in the soil layer For the rod, first use mud to protect the wall, then install the anchor rod reinforcement, and then inject grout to clear the hole and replace it. Because the mud has a lubricating effect on the hole, the friction of the anchor rod is reduced, the main body of the anchor rod is low in strength, the cost of cement grout is high, and the construction period is long. shortcoming

Method used

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  • Sand-filling one-step-forming enlarged anchor pile construction method and device therefor
  • Sand-filling one-step-forming enlarged anchor pile construction method and device therefor
  • Sand-filling one-step-forming enlarged anchor pile construction method and device therefor

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Experimental program
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Effect test

Embodiment 1

[0019] The construction method of sand-injecting one-time expansion head bolt, the bolt drill drills to the design depth and then lifts the drill, injects mortar or fine stone concrete while lifting the drill, injects mortar or fine stone concrete while lifting the drill to form a hole, and then places the main reinforcement of the anchor rod , and then pull back to complete the expansion head, pull back and send it back and forth more than three times to form a complete mortar expansion head, the grouting pressure is between 0.5 and 9Mpa, when it is difficult to install the anchor rod and pull back the anchor rod to form a large head, vibration can be used The feeding and pulling back of the hammer and hydraulic tongs can better ensure the quality of the big end formation. The pumping of mortar (fine stone concrete or cement slurry) should be done continuously, and when there is a stop in the middle, it should be re-drilled for more than 500mm for lap joint.

Embodiment 2

[0021] The head-expanding bolt device described in embodiment 1 comprises: the main reinforcement of the anchor rod 1, a set of support frames 5, the hinge point 3 is installed on the main reinforcement of the anchor rod 1, and a group of enlarged iron rods are fixed The support frame 5 of the flap 2 is installed on the hinge point 3, and the end of the lower end of the support frame 5 is tightened with the return expansion spring 4, and the enlarged iron flap 2 can swing freely, and the primary expansion Install the bolt device into the mortar body that has been poured into the hole, and then lift it out 500mm to form the expansion head when the hole is low.

Embodiment 3

[0023] In the first expansion bolt device described in Embodiment 2, the angle formed by the upper end of the support frame 5 and the main reinforcement 1 of the anchor rod is ≤60°, the angle formed by the lower end and the main reinforcement 1 of the anchor rod is ≤30°, and the upper end+lower end ≤90°. The lower end of the support frame 5 is put on the return expansion spring 4, and the return expansion spring 4 is used for tension, and the expansion iron leaf 2 is stretched outward through the hinge point 3. When installing in the hole, the enlarged iron flap 2 plays the role of guide frame until the bottom of the hole, and the enlarged iron flap still has no less than 1 / 3 part buried in the anchor rod main body.

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Abstract

The invention relates to a method for constructing the sand pulp one-tie expanding anchor rod, and a relative device, wherein in traditional method, since the sand mud has lubricant function on the hole to reduce the friction, the main strength of anchor rod is low, and the cement pulp has high cost; in said invention, the anchor rod driller drills to the design depth, then drawing out the drillerand pouring sand pulp or fine concrete, to form hole, and mounting anchor rod main bar, drawing back to complete the expanding head for three times, while the pouring pressure is between 0.5-9Mpa.

Description

Technical field: [0001] The invention relates to a construction method and a device for one-time expansion of head bolts by injecting mortar. Background technique: [0002] At present, the traditional method of anchor bolts used in building foundation pit support is to pre-form holes, install anchor reinforcement bars, and then inject grout into anchor bolts. This construction method has many procedures and the quality is not easy to guarantee, especially for anchors with water in the soil layer For the rod, first use mud to protect the wall, then install the anchor rod reinforcement, and then inject grout to clear the hole and replace it. Because the mud has a lubricating effect on the hole, the friction of the anchor rod is reduced, the main body of the anchor rod is low in strength, the cost of cement grout is high, and the construction period is long. shortcoming. Invention content: [0003] The purpose of the present invention is to provide a construction method and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/00E21D21/00
Inventor 曹兴明
Owner HEILONGJIANG HUAYAN PILING TECH R & D CO LTD