Rapid evaluation device and application method for the stress state of anchor bolts
A technology for stress state and evaluation device, which is applied in the installation of bolts, earthwork drilling, mining equipment, etc., and can solve problems such as complicated operation, difficulty in guaranteeing welding quality, and increased difficulty in bolt installation
Inactive Publication Date: 2017-01-04
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
This method needs to pre-weld both ends of the vibrating wire on the anchor rod, which not only complicates the operation, but also makes it difficult to guarantee the welding quality, and also greatly increases the difficulty of installing the anchor rod.
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[0016] combined with figure 1 , a fast evaluation device for the stressed state of an anchor rod is characterized in that it mainly includes: a metal foam plate 1 and an enamel coating 2; Square or circular, the center of which is provided with a circular hole through which the anchor rod a can pass; the enamel coating 2 is applied on the upper surface of the foam metal plate; as figure 2 As shown in , the equidistant circular ring pattern is set on the surface of the enamel coating, which is used to quickly judge the size of the enamel coating's avalanche range.
[0017] The application method of the present invention is:
[0018] ① When installing the anchor rod a, install the above-mentioned rapid evaluation device for the stressed state of the anchor rod between the pallet b of the anchor rod and the nut c, and then tighten the nut c;
[0019] ②As the force on the anchor rod gradually increases, the metal foam plate near the nut c begins to deform under pressure, and th...
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The invention discloses a fast evaluation device for the stressed state of an anchor rod, which is characterized in that it mainly comprises: a metal foam plate and an enamel coating; the metal foam plate is made of porous metal foam material; the enamel coating, Apply on the upper surface of the foam metal plate; when installing the anchor rod, install the above-mentioned device between the tray and the nut of the anchor rod, as the force of the anchor rod gradually increases, the enamel coating on the foam metal plate gradually Caving, according to the size of the caving range of the enamel coating, quickly determine the stress state of the bolt, the larger the caving range of the enamel coating, the greater the force of the bolt. The invention uses the deformation characteristics of the foam metal plate to link the stress state of the anchor rod with the collapse range of the enamel coating, and can quickly and intuitively judge the stress state of the anchor rod through observation. Rapid assessment method for bolting effect.
Description
technical field [0001] The invention relates to the field of health detection of anchorage structures in underground engineering, in particular to a device for quickly evaluating the stressed state of anchor rods and an application method thereof. Background technique [0002] In recent years, bolts have been widely used in the field of underground engineering support, and have played an important role in reducing support costs and accidents. Because the bolt is buried inside the surrounding rock, it is a concealed structure, and its health diagnosis and evaluation of its support function are difficult. In order to evaluate the supporting function and health state of the bolt, the axial force of the bolt is generally taken as an important evaluation index, but the measurement of the axial force of the bolt is very difficult. At present, the methods of measuring the axial force of bolts at home and abroad mainly include: strain measurement method, pressure sensor measurement...
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IPC IPC(8): E21D21/02
CPCE21D21/02
Inventor 吴学震蒋宇静王刚乔卫国关振长
Owner SHANDONG UNIV OF SCI & TECH