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Negative Poisson's ratio rotary expansion type square perforated plate array anchor rod device

A technology of negative Poisson’s ratio and perforated plates, which is applied in the installation of anchor rods, sheet pile walls, earthwork drilling and mining, etc., can solve the problems of low soil bond friction strength and difficulty in meeting the design pullout resistance, and achieve Strengthen the effect of anchoring effectiveness, local modification and iteration convenience, and wide application prospects

Active Publication Date: 2022-06-17
JIANGSU UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The bearing capacity of the bolt is mainly provided by the bond friction strength between the anchor body and the surrounding rock-soil medium, but the bond friction strength of some soils is low, and it is often difficult to meet the design pullout force requirements

Method used

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  • Negative Poisson's ratio rotary expansion type square perforated plate array anchor rod device
  • Negative Poisson's ratio rotary expansion type square perforated plate array anchor rod device
  • Negative Poisson's ratio rotary expansion type square perforated plate array anchor rod device

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Embodiment Construction

[0041] The present invention will be further described below with reference to the accompanying drawings and the description of the accompanying drawings.

[0042] In order to make the construction mode and advantages of the present invention more obvious, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. In the following description, numerous specific details are set forth in order to facilitate a full understanding of the construction process of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below. On the premise of not departing from the spirit of the technical solutions of the present invention, all of th...

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Abstract

The invention discloses a negative Poisson's ratio rotary expansion type square perforated plate array anchor rod device, and belongs to the technical field of slope engineering anchor rod supporting. One end of an anchor rod body sequentially penetrates through a supporting structure, a pedestal and an anchorage device, and the other end of the anchor rod body penetrates through an anchorage device fixing plate and is hinged to a negative Poisson's ratio amplification perforated plate array anchoring structure; one end of the negative Poisson's ratio perforated plate array anchoring structure is hinged to a displacement suppressor, when first-stage anchoring fails, the negative Poisson's ratio perforated plate array anchoring structure is slowly unfolded after being pulled, and the effect that the free section ring-pull expansion resistance increasing effect and the ring-pressure contraction resistance reducing effect are parallel is achieved, and two-stage anchoring effectiveness is achieved; the method is suitable for soil slope support, underground engineering, tunnel engineering and the like; on the basis of keeping the application of a rigid anchor rod, the anchor rod also has the advantages of a flexible anchor rod, the anchoring force grading is reliable, and the anchor rod is easy to adjust, supplement, recycle and reuse; the creep resistance is high, the anchoring effect is not affected by gaps existing in a soil body, and the anchor rod is high in overall strength and resistant to abrasion.

Description

technical field [0001] The invention relates to a negative Poisson's ratio rotary enlarged square perforated plate array bolt device, which belongs to the technical field of bolt support for slope engineering. Background technique [0002] Metamaterials refer to artificially designed novel materials, which have physical properties that ordinary materials in nature do not have. . There are two ways for materials with negative Poisson's ratio. One is to construct a new type of material from the microscopic properties through the development of materials science, and the other is to present it when it is stressed in a certain direction through its specific macroscopic geometric structure. specific negative Poisson's ratio properties. Negative-stiffness metamaterials are one of the most important categories, in which force and displacement change in opposite directions during deformation. Negative Poisson's ratio materials and structures have great advantages in shear resista...

Claims

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Application Information

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IPC IPC(8): E02D5/74E21D21/00
CPCE02D5/74E21D21/0026
Inventor 齐永正杨子明陈天蛋李振雄
Owner JIANGSU UNIV OF SCI & TECH
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