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Method for monitoring concrete cracks with glass strips

A technology of glass strips and concrete, applied in the direction of measuring devices, adopting mechanical devices, mechanical measuring devices, etc., can solve the problems of high cost, high use environment requirements, inconvenient use of tunnels, etc., and achieve low cost, easy implementation, and simple operation Effect

Inactive Publication Date: 2018-11-16
SHAANXI HONGNING RAILWAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for monitoring concrete cracks using glass strips, which solves the problems of high cost and high requirements for the use environment and inconvenient use inside the tunnel when using a comprehensive crack tester to monitor concrete cracks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for monitoring concrete cracks using glass strips, the specific steps are as follows:

[0029] Step 1. First measure the original crack length and width with a crack feeler gauge and tape measure. When the crack width is between 3mm-8mm, the crack needs to be monitored;

[0030] Step 2. Use a chisel, a flat shovel and a hand hammer to chisel a construction groove with a width of 2cm, a length of 10cm, and a depth of 10mm along the horizontal direction in the middle of the crack to be monitored, and spray water on the surface of the construction groove to make the surface of the construction groove completely soaked;

[0031] Step 3. Lay a layer of cement mortar layer or epoxy resin adhesive layer with a thickness of 2mm on the bottom of the soaked construction tank, and embed the cut glass strips in the construction tank. Among them, the cement mortar layer is used for laying In the cement mortar, the mass ratio of cement, sand and water is 1:2:3; the size of ...

Embodiment 2

[0034] A method for monitoring concrete cracks using glass strips, the specific steps are as follows:

[0035] Step 1. First measure the original crack length and width with a crack feeler gauge and tape measure. When the crack width is between 3mm-8mm, the crack needs to be monitored;

[0036] Step 2. Use a chisel, a flat shovel and a hand hammer to chisel a construction groove with a width of 3cm, a length of 15cm, and a depth of 15mm along the horizontal direction in the middle of the crack to be monitored, and spray water on the surface of the construction groove to make the surface of the construction groove completely soaked;

[0037] Step 3. Lay a layer of cement mortar layer or epoxy resin adhesive layer with a thickness of 3mm on the bottom of the soaked construction tank, and embed the cut glass strips in the construction tank. Among them, the cement mortar layer is used for laying In cement mortar, the mass ratio of cement, sand and water is 1:2:3;

[0038] The si...

Embodiment 3

[0041] A method for monitoring concrete cracks using glass strips, the specific steps are as follows:

[0042] Step 1. First measure the original crack length and width with a crack feeler gauge and tape measure. When the crack width is between 3mm-8mm, the crack needs to be monitored;

[0043] Step 2. Use a chisel, a flat shovel and a hand hammer to chisel a construction groove with a width of 2.5cm, a length of 12m and a depth of 13mm along the horizontal direction in the middle of the crack to be monitored, and spray water on the surface of the construction groove to make the construction groove The surface is completely wetted;

[0044] Step 3. Lay a layer of cement mortar layer or epoxy resin adhesive layer with a thickness of 2.5mm on the bottom of the soaked construction tank, and embed the cut glass strips in the construction tank. In the cement mortar, the mass ratio of cement, sand and water is 1:2:3;

[0045] The size of the glass strip matches the size of the con...

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Abstract

The invention discloses a method for monitoring concrete cracks with glass strips. The method comprises specific operation steps as follows: a crack feeler gauge and a measuring tape are used for measuring the length and width of original cracks, and whether the cracks require monitoring is judged; a construction groove is horizontally chiseled in the middle of each crack requiring monitoring, andwater is sprayed on the surface of each construction groove, so that the surface of each construction groove is completely wet; finally, a cement mortar layer or an epoxy resin glue layer is laid atthe bottom of each construction groove, the cut glass strip is inlaid in each construction groove, the state of the glass strip is observed regularly, a measuring scale is used for measurement, and measured data are compared with original data. According to the method for monitoring the concrete cracks with the glass strips, glass is used for a concrete crack monitoring marker to monitor bridge and tunnel buildings in real time, some crack changes which cannot be discovered by naked eyes can be found, and although the detection accuracy is not high, the method is simple to operate, low in costand easy to implement.

Description

technical field [0001] The invention belongs to the technical field of concrete crack monitoring methods, and in particular relates to a method for monitoring concrete cracks by using glass strips. Background technique [0002] Concrete cracks are the physical structural changes of concrete structures due to the effects of internal and external factors, and cracks are the main reason for the reduction of the bearing capacity, durability and water resistance of concrete structures. [0003] Bridges and tunnels are often affected by construction technology, geological conditions, and vehicle loads under maintenance conditions. In-pipe bridge piers, supporting pad stones, beam diaphragms, tunnel side walls, vaults, and embankment concrete masonry all appear to varying degrees. Crack disease, crack position and relative change are not obvious, and it is difficult to monitor the degree of crack change in daily inspection, which brings great uncertainties to the daily equipment in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38G01B5/02
CPCG01B5/02G01N33/383
Inventor 刘子阳张建宏张永杰白晓伟
Owner SHAANXI HONGNING RAILWAY