Anchor rod stress measuring reading warning device and usage method

Abstract

The invention discloses an anchor rod stress measuring reading warning device and a usage method. The anchor rod stress measuring reading warning device and the usage method are characterized in that the anchor rod stress measuring reading warning device comprises a flat carrier board, a deformation cover and a stress quantization ruler. The deformation cover is a steel-made nearly spherical device. a pointer is fixed to the deformation cover and is located in the place of 1 / 2 the height of the deformation cover and points to the normal direction of the tangent plane of the deformation cover. the deformation cover is fastened to the flat carrier board through a fastening nut and has normal direction bearing capacity not smaller than the maximum axial force of an anchor rod. a monotone increasing relation exists between the load borne by the deformation cover and the rotation angle of the pointer. The pointer points to the stress quantization ruler. Scales with the unit of kN are marked on the stress quantization ruler. The scale range of the anchor rod breaking load 0-60% is marked as green, the scale range of 60%-90% is marked as yellow, and scale range of 90% or above is marked as red. According to the anchor rod stress measuring reading warning device and the usage method, all anchor rods can be monitored under the condition that additional cost does not need to be increased, and significance is achieved to safety and economy of site construction.

Description

technical field [0001] The invention relates to the field of force monitoring of anchor rods, in particular to an early warning device for force detection and reading of anchor rods and a use method. Background technique [0002] With the development of my country's economy and society, more and more underground mines, tunnels, subways, hydropower chambers, etc. are being built, and the depth is increasing. protrude. Such as large deformation of soft rock, high ground pressure and difficult support problems. During the use of conventional anchor bolts to reinforce slopes, mine roadways, tunnels, dams, etc., the force of the anchor bolts cannot be displayed intuitively, and cannot meet the requirements of early warning. In the field engineering anchoring, the stress state and structural deformation state of the anchor rod are not clear, and it is easy to cause safety hazards by relying on the personal experience of workers to judge whether it is safe. At present, the most c...

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Problems solved by technology

However, the accessories of this invention have high cost, poor economy, low construction efficiency, and normal work depends on power supply

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