Axial Force Monitoring Device and Experimental Method of Full-length Bonded Inclined Bolt

A monitoring device and bolt technology, which can be used in measuring devices, force/torque/work measuring instruments, force sensors in holes of stressed structures, etc., can solve problems such as difficulty in detecting bolts in tunnel construction

Active Publication Date: 2021-09-14
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is just to solve the problem that the detection difficulty of bolt acceptance in tunnel construction at the present stage

Method used

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  • Axial Force Monitoring Device and Experimental Method of Full-length Bonded Inclined Bolt
  • Axial Force Monitoring Device and Experimental Method of Full-length Bonded Inclined Bolt
  • Axial Force Monitoring Device and Experimental Method of Full-length Bonded Inclined Bolt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A full-length bonded inclined bolt axial force monitoring device, see Figure 1 to Figure 10 , including the assembled anchor to be tested, the dynamometer is installed on the assembled anchor to be tested, and a special-shaped protective sleeve is set on the outside, and the bottom end of the assembled anchor to be tested is installed to fix it in the tunnel The inclined backing plate on the rock; the assembled anchor rod to be tested includes at least 3 sections of threaded steel bars, the two ends of the threaded steel bars are provided with threads, and a dynamometer is installed between every two threaded steel bars via thread fit; the special-shaped The protective sleeve is a hollow cylindrical casing, and the end surfaces on both sides are respectively provided with at least two symmetrical sets of externally inclined trumpet-shaped baffles; the inclined pad is provided with holes for anchor rods and wires.

[0038] The length of the threaded steel bar in the ass...

Embodiment 2

[0056] The principle of this embodiment is the same as that of Embodiment 1, except that the dynamometer is a spindle-shaped sensor of revolution, and both ends are hollow cylinders with internal threads. The two ends are thick for stress, and the middle is thin for cooperation with other components and the realization of related measurements, especially the width of the special-shaped sleeve is less than 2 / 3 of the length of the rotary body, and the self-locking between the equipment is realized through the friction of the arc surface, so that Ensure the stability of the equipment during the grouting process.

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Abstract

The invention relates to the technical field of axial force monitoring of bolt support structures in tunnel engineering, in particular to a full-length bonded inclined anchor axial force monitoring device and an experimental method. The purpose is to solve the problem of difficult detection of anchor rod force in tunnel construction at the present stage. The invention includes an assembled bolt to be tested, the dynamometer is installed on the assembled bolt to be tested, and a special-shaped protective sleeve is set on the outside of the assembled bolt to be tested. The slanted backing plate on the top; the assembled anchor rod to be tested includes at least 3 sections of threaded steel bars, and the two ends of the threaded steel bars are provided with threads, and the dynamometer is installed between every two threaded steel bars through thread cooperation; the special-shaped protective sleeve is a hollow cylindrical sleeve The tube has at least two symmetrical outer inclined trumpet-shaped baffle groups on the end faces on both sides. The advantages are: the anchor rod is evenly stressed, avoiding shear stress damage at the end of the anchor rod, avoiding wire extrusion and wear damage during installation, and ensuring the segmental axial force test of the full-length bonded anchor rod.

Description

technical field [0001] The invention relates to the technical field of axial force monitoring of tunnel engineering bolt support structures, in particular to a full-length bonded inclined bolt axial force monitoring device and a test method. Background technique [0002] With the vigorous development of national infrastructure construction, there are more and more long-distance railway tunnels and hydraulic tunnels. The application of open TBM in the construction of such long-distance mountain tunnels is very common, and bolt support is a must in the construction. Therefore, in the design and construction of tunnel engineering, in order to understand the force of the anchor bolt, analyze the change law of the axial force of the anchor bolt, and optimize the design of the anchor bolt, it is necessary to monitor and analyze the axial force of the anchor bolt during the tunnel engineering construction. [0003] In the excavation construction of the open TBM, although the bolter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00
CPCG01L5/0004
Inventor 孙振川王利明李凤远张兵白亮赵海雷文斌杨光秦净净张迎宾董长平
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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