Resistance-increasing yielding large-deformation anchor rod and construction method thereof

A large deformation and bolt technology, which is applied in the installation of bolts, earth cube drilling, mining equipment, etc., can solve the problems of complex structure, poor deformation ability, inconvenient construction, etc., and achieve simple connection method, convenient construction, and convenient assembly Effect

Inactive Publication Date: 2016-02-10
SHANDONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing bolts have poor deformation capacity and cannot adapt to the large deformation characteristics of the surrounding rock. When the large deformation of the surrounding rock exceeds the capacity range that the bolt can bear, it will easily lead to the failure of the bolt support system and the instability of the surrounding rock. , tunnel structure damage
[0003] In order to adapt to the characteristics of large deformation of the surrounding rock and overcome the shortcom

Method used

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  • Resistance-increasing yielding large-deformation anchor rod and construction method thereof

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Example Embodiment

[0014] Such as figure 1 The resistance-increasing and large deformation anchor rod shown is composed of a deformation spring 1, an anchor rod 2, a fixed ball 3, and a connecting sleeve 4; the deformation spring 1 uses a high-strength tension spring; the anchor rod 2 is Solid metal rod body; the fixed ball 4 is a hollow elliptical metal sphere, and they are all equipped with externally threaded connectors; through the processing of the internally threaded connecting sleeve 4, the deformation spring 1 is sequentially connected between the two fixed balls 3 The anchor rod 2 forms a structural unit that increases the resistance and allows pressure to deform the anchor rod; assemble several of the above units according to the anchoring depth or length, and connect a section of anchor rod 2 at the outermost end to install the anchor rod tray And nut to form an increased resistance to allow the anchor rod to deform.

[0015] During construction, first assemble the deformed spring 1, th...

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Abstract

The invention discloses a resistance-increasing yielding large-deformation anchor rod and a construction method thereof. The resistance-increasing yielding large-deformation anchor rod is composed of deformation springs, anchoring rods, fixing balls and connecting sleeve barrels; high-strength extension springs are adopted as the deformation springs, solid metal rod bodies are adopted as the anchoring rods, hollow elliptical metal ball bodies are adopted as the fixing balls, and each fixing ball is provided with connectors with outer threads; the deformation springs and the corresponding anchoring rod are sequentially connected between two corresponding fixing balls through the corresponding connecting sleeve barrels with inner threads to form a structure unit of the resistance-increasing yielding large-deformation anchor rod; a plurality of the structure units are assembled according to the anchoring depth or length, and the end of the outermost structure unit is further connected with one anchoring rod segment for allowing a tray and a nut of the anchor rod to be installed, and then the resistance-increasing yielding large-deformation anchor rod is formed. The resistance-increasing yielding large-deformation anchor rod can be tensioned to deform when surrounding rock generates large deformation, the resistance is steadily increased simultaneously, and therefore the stability of the surrounding rock is effectively kept.

Description

technical field [0001] The invention relates to an anchor rod used for tunnel engineering support, in particular to a large-deformation anchor rod with the function of increasing resistance and allowing pressure. Background technique [0002] Bolt shotcrete support is an important support method in tunnel engineering, and anchor rod is an important support material. In the construction of modern tunnels, the geological and stratigraphic conditions that the tunnel passes through are becoming more and more complex, and the surrounding rocks often show the characteristics of large deformation, and the stability of the surrounding rocks is becoming more and more prominent. However, the existing bolts have poor deformation capacity and cannot adapt to the large deformation characteristics of the surrounding rock. When the large deformation of the surrounding rock exceeds the capacity range that the bolt can bear, it will easily lead to the failure of the bolt support system and t...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/00
Inventor 李承胜李廷春朱庆文马齐张国朋刘启顺陆登科
Owner SHANDONG UNIV OF SCI & TECH
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