CN104807390A - Concrete surface characteristic measurement instrument and method - Google Patents

Abstract

The invention relates to a measuring instrument for concrete surface characteristics and a using method thereof, belonging to the field of engineering precision measurement and quality evaluation. It is used to measure the surface characteristics of concrete. It is composed of a bracket, an X-direction walking system, a Y-direction traveling system, a displacement meter and a fixing device; wherein, the bottom of the bracket is provided with four liftable supports, and the side of the bracket is fixed with a A rotatable disc level tube with an angular scale arranged in the X direction, and a horizontal level tube arranged along the Y direction is fixed on the top surface of the bracket; the displacement gauge is fixedly connected to the Y-direction walking system through a fixing device. Taking the surface baseline inclination angle and surface unevenness as parameters, the precise and continuous measurement and double-parameter evaluation of concrete surface characteristics are realized. The measuring instrument adopts the combination of manual control and automatic reading, which is easy to operate, wide in application range, high in precision and low in cost. It is suitable for evaluating the surface processing quality of various components.

Description

A concrete surface characteristic measuring instrument and its testing method

technical field

The patent of the invention relates to a measuring instrument for concrete surface characteristics and its usage method, belonging to the field of engineering precision measurement and quality evaluation.

Background technique

Reinforced concrete structure is one of the most widely used structural forms at home and abroad. Due to design and construction defects, various physical, chemical and biological damages in nature, or increased use requirements, a large number of engineering structures need to be reinforced and transformed. Retrofitting inevitably involves the bonding of old and new concrete. Since the performance of the new and old concrete bonding surface determines whether the repaired and reinforced structure can work together and the bearing capacity, and the roughness of the interface is the main parameter affecting the performance of the new and old concrete bonding surface, so the high-precision measurement of the concrete surface Roughness is of great significance to the performance research and engineering quality evaluation of the interface between old and new concrete.

The current common interface roughness evaluation uses the average depth as the evaluation index. The measurement methods include sand filling method and measuring instrument method.

The method of filling (spreading) sand is to set baffles around the measurement area, fill the inside with sand, and calculate the average depth through the volume of filled sand. The average depth method of sand pouring is inconvenient to be applied in the field and is not suitable for inclined interfaces. At present, the local unevenness of the road surface is still covered with sand.

At present, there are high-precision electronic roughness measuring instruments on the market. These instruments are mainly used in the field of mechanical processing, and the precision is small (micron-level) unevenness, which is not suitable for the field of civil engineering. And its test method is to slide on the surface, which is suitable for scratch test to obtain 1-dimensional surface characteristic curve and concave-convex value, which is not suitable for millimeter-scale randomly distributed rough surfaces.

Some scientific research institutes have designed concrete roughness measuring instruments. Before the instrument is tested, it is first necessary to divide the concrete surface into units according to the measurement accuracy. The test is a point-by-point one-dimensional measurement, and the measurement device needs to be repeatedly installed and disassembled. This makes the measurement work more cumbersome and inefficient.

Using the average depth method as the evaluation index of surface characteristics can not reflect the local concave-convex distribution characteristics at all, so it is difficult to establish a quantitative relationship between surface characteristics and the bonding performance of new and old concrete.

Contents of the invention

In order to solve the above technical problems, the present invention develops a high-precision two-dimensional measuring instrument and method that is easy to operate, has a wide application range, and can measure the included angle of the concrete interface baseline and the local concave-convex distribution relative to the baseline. Evaluation of the surface characteristics of components with two indicators based on the uneven distribution of the baseline.

The present invention realizes the purpose of the invention through the following technical solutions:

A measuring instrument for concrete surface characteristics, comprising a bracket, an X-direction traveling system, a Y-direction traveling system, a displacement meter and a fixing device; wherein, the support is provided with the X-direction traveling system, the Y-direction traveling system, the support A rotatable disc level tube with angular scale arranged along the X direction is fixed on the side, and a horizontal level tube arranged along the Y direction is fixed on the top surface of the bracket; the displacement gauge is fixedly connected to the Y-direction walking system through a fixing device above; the bottom of the bracket is provided with four liftable supports.

Further, both the X-direction traveling system and the Y-direction traveling system are composed of graduated tracks and moving gear rolling devices.

Further, the fixing device includes a displacement meter fixing baffle and a fixing nut, and the displacement meter is fixed on the scale track on the Y-direction traveling system through the fixing nut and the displacement meter fixing baffle.

Further, the displacement meter is a dial gauge.

Further, the displacement meter is a dial gauge.

Further, the displacement meter is an electronic displacement meter.

A described test method for a concrete surface characteristic measuring instrument comprises the following steps:

Step 1. Baseline inclination measurement: After calibration on the standard horizontal plane and making the four supports equal, support the four supports of the measuring instrument on the surface of the measurement area, keep the horizontal vial level, and rotate the vial with the rotatable angle dial Make it level and the dial reads the baseline tilt angle.

Step 2. Roughness measurement: Determine the minimum measurement accuracy, move the gears row by row, and move the displacement gauge in the X and Y directions, and read the concave-convex depth value.

In the method, the surface feature measurement of different concave-convex depths is realized by adjusting the liftable support; the test accuracy is improved by adjusting the moving step size in the X and Y directions and the precision of the displacement meter.

In the method, the distance between the support and the concrete interface to be tested is 25 mm larger than the maximum concave-convex value.

The beneficial effects of the present invention are:

The measuring instrument used for concrete surface features has simple equipment and strong operability, and can realize high-precision local concave-convex two-dimensional measurement with different precision; it can also measure the inclination angle of the surface baseline.

The measurement results correspond to the dual-index surface test method based on baseline and local distribution rules, which is more scientific and reasonable than the original measurement method and surface feature evaluation method.

Based on this, it is expected to establish the quantitative relationship between surface characteristics and interface bonding performance, which is of great value for the research on the reinforcement performance of concrete structures and the evaluation of component surface construction quality.

Description of drawings

Fig. 1 is the three-dimensional view that is used in the concrete surface feature measuring instrument in the present invention;

Fig. 2 is used for the plane view of concrete surface feature measuring instrument among the present invention;

Fig. 3 is a side view of the measuring instrument for concrete surface characteristics in the present invention;

Fig. 4 is used in the present invention for concrete surface feature measuring instrument A-A sectional view;

Fig. 5 is due to the B-B sectional view of concrete surface feature measuring instrument among the present invention;

Fig. 6 is the C-C sectional view of measuring instrument for concrete surface characteristics in the present invention;

Fig. 7 is a plan view of the displacement meter walking device in the present invention;

Fig. 8 is a D-D sectional view of the displacement meter walking device in the present invention;

Fig. 9 is a side view of the displacement meter walking device in the present invention;

Fig. 10 is a detailed view of the support in the present invention;

Fig. 11 is a detailed view of the dial in the present invention;

Among them 1. X walking system; 2. Y walking system; 3. Lifting support; 4. Gear traveling device; 5. Scale track; 6. Horizontal vial; Displacement meter; 9. Displacement meter fixed baffle; 10. Fixed nut; 11. Rotary button; 12. Concrete; 13. Disk with scale; 14. Steel plate with slot; 15. Rotary bearing; 16. Fixed baffle; 17. Scale position pointer.

Detailed ways

A concrete surface characteristic measuring instrument is composed of a support, an X-direction traveling system, a Y-direction traveling system, a displacement meter and a fixing device; wherein, the bottom of the support is provided with four liftable supports, and the support is fixed with A rotatable disc level tube with an angular scale arranged along the X direction, and a horizontal level tube arranged along the Y direction; the displacement gauge is fixedly connected to the Y-direction traveling system through a fixing device.

The surface feature measuring instrument can be used for rough interface feature measurement at any inclination angle.

Baseline inclination measurement: After calibration on the standard horizontal plane and making the four supports equal, support the four supports of the measuring instrument on the surface of the measurement area, keep the horizontal vial 6 level, and rotate the vial 7 with the rotatable dial with an angle. Its level, the dial reading is the baseline inclination angle.

Roughness measurement: Determine the minimum measurement accuracy, move the gears row by row, and move the displacement meter in the X and Y directions to read the depth value of the bump. By adjusting the lifting support 3, the surface feature measurement of different concave-convex depths can be realized; by adjusting the moving step size in the X and Y directions and the precision of the displacement meter, the test accuracy can be improved.

The measuring instrument for concrete surface characteristics realizes rapid positioning of the instrument and measurement of the standard measuring area by using an instrument support having the same size as the standard measuring area.

The measuring instrument for concrete surface characteristics can meet the measurement of surface characteristics of different concave-convex depths by setting an adjustable support.

The measuring instrument for the surface characteristics of concrete realizes the leveling of the instrument and the measurement of the inclination angle of the base line of the surface inclination by setting a two-way level pipe.

The measuring instrument for concrete surface features realizes two-dimensional high-precision point patrol measurement by setting X and Y two-way traveling devices and gears, and can adjust the step size of two-way measuring points.

The measuring instrument for concrete surface characteristics can realize measurement with different precisions by adjusting the two-way moving step length and selecting displacement meters with different precisions.

The measuring instrument for concrete surface characteristics can realize automatic reading by using an electronic displacement meter.

The measuring instrument for concrete surface characteristics realizes continuous and stable measurement of the displacement meter through the X-direction and Y-direction traveling device and the displacement meter and its fixing device, avoiding repeated disassembly and installation.

The measuring instrument for concrete surface features ensures that the end of the displacement meter has enough free movement space by limiting the distance between the support and the baseline.

The measuring instrument for concrete surface characteristics can provide corresponding test data for dual-index surface characteristic evaluation through measurement results.

Claims (8)

1. A measuring instrument for concrete surface features, characterized in that: comprise a support, X-direction travel system, Y-direction travel system, displacement meter and fixing device; wherein, said support is provided with said X-direction travel system, Y-direction walking system, a rotatable disc level tube with angular scale arranged along the X direction is fixed on the side of the support, and a horizontal level tube arranged along the Y direction is fixed on the top surface of the support; the displacement gauge is fixedly connected to the On the Y-direction walking system; the bottom of the bracket is provided with four liftable supports. 2. The instrument for measuring surface characteristics of concrete as claimed in claim 1, characterized in that: the X-direction traveling system and the Y-direction traveling system are both composed of graduated tracks and mobile gear rolling devices. 3. The measuring instrument for concrete surface characteristics as claimed in claim 2, characterized in that: said fixing device comprises displacement meter fixed baffle plate, fixed nut, and displacement meter is fixed by said fixed nut and displacement meter fixed baffle plate On the scale track on the Y-direction walking system. 4. The instrument for measuring surface characteristics of concrete according to claim 1, wherein the displacement meter is a dial gauge. 5. The instrument for measuring surface characteristics of concrete according to claim 1, wherein the displacement meter is a dial indicator or an electronic displacement meter. 6. A method for testing a concrete surface characteristic measuring instrument based on any one of claims 1 to 5, characterized in that it comprises the following steps: Step 1. Baseline inclination measurement: After calibration on the standard horizontal plane and making the four liftable supports equal, support the four liftable supports of the measuring instrument on the surface of the measurement area, keep the horizontal vial level, and rotate it with an angle Level the level tube on the dial, and the reading on the dial is the baseline inclination angle; Step 2. Roughness measurement: Determine the minimum measurement accuracy, move the gears row by row, and move the displacement gauge in the X and Y directions, and read the concave-convex depth value. 7. the testing method that is used for concrete surface feature measuring instrument as claimed in claim 6, is characterized in that: realize the surface feature measurement of different concavo-convex depths by adjusting liftable support; By adjusting X, Y direction moving step size and Displacement gauge precision, improve test accuracy. 8. The test method for a concrete surface characteristic measuring instrument as claimed in claim 6, wherein the distance between the support and the concrete interface to be tested is 25mm larger than the maximum concave-convex value.