Anchor rod device

A bolt and self-anchoring technology, which is applied to the installation of bolts, sheet pile walls, mining equipment, etc., can solve the problems of being unable to determine whether the pre-tightening force of the bolt is too large or insufficient, unable to measure the torque, and restricting the installation of the bolt.

Active Publication Date: 2013-12-04
HUAINAN MINING IND GRP
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  • Summary
  • Abstract
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Problems solved by technology

[0004] However, in the prior art, it is necessary to determine the pre-tightening force of the anchor rod by frequently measuring the torque when installing the anchor rod, that is, the pre-tightening force is obtained by measuring the torque all the time during the installation process, and then continue to increase the pre-tightening force when the pre-tighten...

Method used

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Embodiment Construction

[0022] figure 1 A schematic structural view of the first embodiment of the anchor device provided by the present invention, such as figure 1 As shown, the bolt device 1 includes:

[0023] The anchor rod 10, and the anchor rod supporting plate 11, the spring 12 and the nut 13 are sequentially sleeved on the anchor rod from the axial center outward of the anchor rod.

[0024] By installing the anchor rod 10, the rock wall can be reinforced, mainly through the longitudinal tension of the rod body of the anchor rod 10, to overcome the shortcoming that the tensile capacity of the rock and soil body is far lower than the compressive capacity. On the surface, it can be seen as limiting the separation of rock and soil from the original body. Macroscopically, it can be seen as increasing the cohesion of rock and soil. From a mechanical point of view, it can be seen as improving the cohesion and internal friction angle of the surrounding rock mass.

[0025] It should be noted that t...

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PUM

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Abstract

The invention provides an anchor rod device. The anchor rod device comprises an anchor rod, an anchor rod supporting plate, a spring and a nut, wherein the anchor rod is sequentially sleeved with the anchor rod supporting plate, the spring and the nut outward from the axial center of the anchor rod. When the nut is in the state that screwing is completed, the anchor rod supporting plate is tightly pressed into a palisade through the spring, wherein the anchor rod is inserted into the palisade. The yield strength of the spring is larger than or equal to the pre-tightening force borne by the anchor rod supporting plate when screwing of the nut is completed. According to the anchor rod device, whether the pre-tightening force is enough or not can be more intuitively tested so that the anchor rod can be more conveniently and rapidly installed.

Description

technical field [0001] The invention relates to mechanical technology, in particular to a bolt device. 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 bolt reinforcement. The formation is reinforced through the high-strength tensile capacity of the anchor installed in the formation and the dense combination between the anchor and the grouting body around the anchor and the formation. [0003] The bolt preload is an important index reflecting the initiative and timeliness of bolt support, and plays a decisive role in the support effect of the stratum, such as the support effect of the surrounding rock. If sufficient pre-tightening force can be applied when the bolt is installed, the initial slippa...

Claims

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Application Information

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IPC IPC(8): E21D21/00E02D5/74
Inventor 刘亮秦建波
Owner HUAINAN MINING IND GRP
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