Block assembly type yielding hollow grouting anchor rod and construction method thereof

A technology of segmented assembly and grouting bolts, which is used in the installation of bolts, earth-moving drilling, mining equipment, etc. Long anchorage and other problems, to achieve the effect of preventing tensile failure, improving integrity and deformation coordination, and high initial preload

Pending Publication Date: 2018-03-23
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Combining the anchor rod and the anchor cable can give full play to the advantages of the two. At present, steel strands and rebars are welded together, but the welding connection reduces the strength of rebars and steel strands, and the adhesion Disadvantages of insufficient adhesive bonding
The Chinese patent with the patent number of 201510091352.7, the construction method of the assembled hollow grouted anchor, provides an assembled hollow

Method used

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  • Block assembly type yielding hollow grouting anchor rod and construction method thereof
  • Block assembly type yielding hollow grouting anchor rod and construction method thereof
  • Block assembly type yielding hollow grouting anchor rod and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1:

[0036] like figure 1 As shown, a segmented assembly pressure yielding hollow grouting anchor includes a hollow anchor body 1, a hollow anchor cable body 2, a pressure yielding device 13 arranged on the hollow anchor body 1, a tray 4, a nut 5 and The grout stopper 6, the anchor cable hoop 22 and the reaming device 23 arranged on the hollow anchor cable rod body 2, the hollow anchor rod body 1 and the hollow anchor cable rod body 2 are connected through the connecting sleeve 3.

[0037] like figure 2 As shown, the hollow anchor body 1 includes a multi-section segmented hollow anchor body 11, the length of the segmented hollow anchor body 11 is 1.0 m, and the number is 4, and the two ends of the segmented hollow anchor body 11 are externally threaded 7 processing, the length of the external thread 7 is half of the length of the pressure relief device 13, that is, 0.2m, and the holes of Φ5mm are pierced every 50mm in the radial direction as the anchor grouti...

Example Embodiment

[0047] Example 2:

[0048] A segmented assembly type yielding pressure hollow grouting anchor, wherein the length of the segmented hollow anchor body 11 is 1.0m, the number is 2, the length of the yielding device is 0.4m, the number is 1, and the hollow The anchor rod body 2 is formed by 8 steel strands 21 reversely twisted and closely fitted, and the length is 6300mm. All the other construction methods and steps are the same as in Example 1.

Example Embodiment

[0049] Example 3:

[0050] A segmented assembly type yielding pressure hollow grouting anchor, in which the length of the segmented hollow anchor body 11 is 0.5m, and the number is 6, the length of the yielding device is 0.4m, the number is 5, and the hollow The anchor rod body 2 is formed by 14 steel strands 21 reversely twisted and closely fitted, and the length is 5000 mm. All the other construction methods and steps are the same as in Example 1.

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Abstract

The invention discloses a block assembly type yielding hollow grouting anchor rod. The block assembly type yielding hollow grouting anchor rod comprises a hollow anchor rod body, a hollow anchor cablerod body, a yielding device, a tray, a nut, a slurry stopping plug, an anchor cable hoop sleeve and a chambering device, wherein the yielding device, the tray, the nut and the slurry stopping plug are arranged on the hollow anchor rod body, the anchor cable hoop sleeve and the chambering device are arranged on the hollow anchor rod body, and the hollow anchor rod body is connected with the hollowanchor cable rod body through a connecting sleeve. The block assembly type yielding hollow grouting anchor rod can give full play to the advantages of an anchor rod and an anchor cable, not only canthe hanging action of the anchor rod to shallow surrounding rock be utilized, but also the stability of deep surrounding rock can be improved by utilizing the anchor cable, favorable independent and multipoint yielding effects on the hollow anchor rod body can be achieved by the yielding device, the whole harmony of the hollow anchor cable rod body is improved by a anchor cable hoop, multipoint grouting is realized by the chambering device, the rod body length can be freely adjusted according to requirement, and on-site construction and adjustment are convenient.

Description

technical field [0001] The invention relates to the fields of geotechnical engineering anchorage and engineering support, in particular to a segmentally assembled yielding pressure hollow grouting anchor and a construction method thereof. Background technique [0002] In underground engineering, mining engineering, tunnel engineering, foundation pit and slope engineering, bolt is the main support technology for stratum reinforcement, preventing stratum deformation and instability. The interaction of the physical force of the hole wall and rock actively improves the strength and stability of the rock and soil mass, making it reach a safe and stable state. The anchor cable is made of flexible and bendable steel strands. It has the advantages of convenient installation, large anchoring depth, high bearing capacity and active reinforcement of surrounding rock. It is widely used in the support structure of underground engineering. [0003] Combining the anchor rod and the anchor...

Claims

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Application Information

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IPC IPC(8): E21D20/02E21D21/00
CPCE21D20/02E21D21/0026E21D21/0093
Inventor 姚韦靖庞建勇
Owner ANHUI UNIV OF SCI & TECH
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