Shell expansion type rock bolt

An expanding-shell, bolting technology, applied in the installation of bolts, construction, mining equipment, etc., can solve problems such as cracking, corrosion of steel bars, and limited length of bolts, and achieve simple construction technology, improved service life, and cost-effectiveness. superior effect

Active Publication Date: 2004-11-10
项小珍 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: 1) It is difficult to guarantee the fullness of the slurry, and because of the deviation phenomenon when inserting the steel bar, the thickness of the steel bar protective layer is not easy to be uniform, and the anchoring force is not large
Corrosion and destruction of steel bars
2) At the same time, because prestressing cannot be implemented, the grouting body cracks with the deformation of the steel bar, so that water vapor directly invades the steel bar, affecting the service life
3) Not suitable for broken ground
4) Since the bolt support force is formed after the mortar is slowly hardened, it is not suitable for occasions where the support force needs to be formed quickly
[0007] 2. Early-strength cement drug coil anchor and resin drug coil anchoring fully bonded solid anchor: Although the ordinary mortar solid anchor has been improved, the range of applicable s

Method used

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  • Shell expansion type rock bolt
  • Shell expansion type rock bolt
  • Shell expansion type rock bolt

Examples

Experimental program
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Example Embodiment

[0042] As shown in the figure, an expanding shell anchor rod is composed of an expanding shell anchoring head 1, a bolt body 10, a supporting backing plate 4, a tightening nut 5, a washer 6, and a connecting pipe 8. The expanding shell anchoring head 1 is composed of an expanding shell. The wedge 2 and the two-lobed shell expansion clip 3 are formed, and the shell expansion clip 3 is fixed in the opening grooves 13 on both sides of the expansion shell inner wedge 2 through the binding rope 11. The lower part of the expansion shell inner wedge 2 and the anchor rod body 10 Connection, the upper two sides are open grooves 13, and the middle of the upper end of the open groove 13 is provided with a sloped wedge 14 to form a double-sided wedge-shaped sliding groove 20; the inner side of the shell expansion clip 3 has a sloped surface 15 that matches the sloped wedge 14; the bolt body 10 After the top end enters the inner wedge 2 of the expanding shell, it can cooperate with the lowe...

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PUM

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Abstract

The invention is a case expanding anchor shank, composed of case expanding anchoring head, anchor shank body, supporting backing plate, fastening nut, washer, and connecting pipeline, where the anchoring head is composed of inner wedge and two clamp pieces, the clamp pieces are fixed in the open slots on two sides of the inner wedge, the lower part of the inner wedge is connected with the anchor shank body, two sides of the top of the inner wedge have the open slots with inclined wedges in the middle of the top, forming double-face wedge sliding slots; the insides of the clamp pieces have inclines to cooperate with the inclined wedges, respectively. The anchor shank is installed and can rapidly form shoring anchoring force, to control rock mass deformation, both acting as permanent both temporary shoring and can be applied to shoring on most conditions of lithoid surrounding rock.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering anchoring support, and relates to a shell-expanding anchor rod, which is suitable for stratum structure support in underground engineering, mining engineering, foundation pit and slope engineering, and the like. Background technique [0002] In the process of underground engineering, mining engineering, foundation pit and slope engineering involved in geotechnical engineering, in order to prevent the formation from deforming, collapsing or destabilizing and endangering safety, a main support technology for strengthening the formation is to use bolts. Through the high-strength tensile capacity of the bolt installed in the formation and the dense combination between the bolt and the grouting body around the anchor and the formation, the formation is strengthened to improve the integrity of the formation and play a role. Various mechanical effects such as shear resistance, tension re...

Claims

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Application Information

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IPC IPC(8): E02D5/74E21D20/00E21D21/00
Inventor 吴德兴
Owner 项小珍
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