CN116087094A - Three-phase interface bonding performance test method and device based on digital image technology - Google Patents
Three-phase interface bonding performance test method and device based on digital image technology Download PDFInfo
- Publication number
- CN116087094A CN116087094A CN202310057449.0A CN202310057449A CN116087094A CN 116087094 A CN116087094 A CN 116087094A CN 202310057449 A CN202310057449 A CN 202310057449A CN 116087094 A CN116087094 A CN 116087094A
- Authority
- CN
- China
- Prior art keywords
- phase interface
- observation window
- anchor rod
- digital image
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000005516 engineering process Methods 0.000 title claims abstract description 38
- 238000011056 performance test Methods 0.000 title claims description 17
- 238000012360 testing method Methods 0.000 claims abstract description 100
- 239000011435 rock Substances 0.000 claims abstract description 64
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 238000010998 test method Methods 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 238000010191 image analysis Methods 0.000 claims description 19
- 239000002023 wood Substances 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 14
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 230000002093 peripheral effect Effects 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 238000005286 illumination Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005315 distribution function Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007586 pull-out test Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 101150114468 TUB1 gene Proteins 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of adhesive property tests, and discloses a three-phase interface adhesive property test method and device based on a digital image technology, wherein the method comprises the following steps: step 1: collecting material parameters of a component material of a three-phase interface to be detected; the three-phase interface is an anchor rod-mortar-rock mass three-phase interface, and the composition materials comprise anchor rods, mortar and rock mass; step 2: preparing a test piece of a three-phase interface to be tested; step 3: setting digital image technology equipment; step 4: spraying speckle particles at the observation window; collecting the surface image of the test piece at the observation window; step 5: carrying out a drawing test on the anchor rod and recording drawing test data; step 6: and (3) analyzing and obtaining the local bonding failure rule of the three-phase interface based on the surface image of the test piece and the drawing test data obtained in the step (3). The method and the device provided by the invention have universality and can accurately analyze and obtain the three-phase interface bonding performance on the basis of obviously observing the interface damage.
Description
Technical Field
The invention relates to the technical field of adhesive property tests, in particular to a three-phase interface adhesive property test method and device based on a digital image technology.
Background
The anchor rod is widely applied to the engineering construction fields of mines, tunnels, slopes, deep foundation pits, underground spaces and the like. According to incomplete statistics, the anchor rod consumption per year is about 3500-4000 km only in side slope and deep foundation pit engineering in China at the beginning of 21 st century.
In the anchor bolt support in the rock-soil anchoring engineering, liquid cement mortar is generally injected into a stratum drilling hole provided with an anchor bolt in a pressure mode, and a firm grouting layer is formed between the grouting hole and the anchor bolt body after the grout is hardened. The anchoring section formed by grouting the anchor rod can effectively improve the bearing capacity of the anchor rod and the pulling resistance after construction, the grout penetrates into stratum cracks under the action of grouting pressure, the structural strength and mechanical indexes of stratum around the anchor rod can be improved, and the effects of solidifying the stratum and improving the bearing capacity of the stratum are achieved; the grouting layer wrapped on the anchor rod body also plays a role in isolating and preventing corrosion to protect the anchor rod body.
In the anchor bolt support, the binding force is used as the premise and the foundation of the combined action of two materials of the reinforcing steel bar and the mortar, and has important influence on the service performance of the anchor bolt. But the bonding performance of the interface between the steel bar of the anchor rod structure and the mortar at present needs to be further explored. In addition, the following research directions are mainly used in the prior related art research: (1) researching friction characteristics of mortar and rock mass; (2) researching the bonding performance of an anchor rod and a mortar interface; (3) an observation method of interface destruction.
Therefore, it is also desirable to provide a device or method that has universal adaptability, can clearly observe interface failure, and can analyze the adhesive properties of the interface on the basis of satisfying the observed interface failure.
Disclosure of Invention
The invention aims to provide a three-phase interface bonding performance test method and device based on a digital image technology, which have universality and can accurately analyze and obtain the three-phase interface bonding performance on the basis of obviously observing interface damage.
In order to achieve the above purpose, the present invention provides the following basic scheme:
scheme one
The three-phase interface adhesive property test method based on the digital image technology comprises the following steps:
step 1: collecting material parameters of a component material of a three-phase interface to be detected; the three-phase interface is an anchor rod-mortar-rock mass three-phase interface, and the composition materials comprise anchor rods, mortar and rock mass;
step 2: preparing a test piece of a three-phase interface to be tested;
step 2.1: filling a fixed amount of rock mass into a mould, and prefabricating anchor holes at the top of the rock mass; an observation window for observing the test piece is arranged on the die; when the rock mass is filled, an auxiliary piece is placed at the observation window;
step 2.2: setting an anchor rod at an anchor hole, and injecting mortar into a mold; and taking out the auxiliary parts after the mortar is solidified;
step 3: setting digital image technology equipment;
step 4: spraying speckle particles at the observation window; collecting the surface image of the test piece at the observation window;
step 5: carrying out a drawing test on the anchor rod and recording drawing test data;
step 6: and (3) analyzing and obtaining the local bonding failure rule of the three-phase interface based on the surface image of the test piece and the drawing test data obtained in the step (3).
Scheme II
The three-phase interface bonding performance test device based on the digital image technology is applied to the three-phase interface bonding performance test method based on the digital image technology as described in scheme one; comprises a mould and digital image technical equipment; the die comprises a barrel body and a barrel cover; the barrel body is used for accommodating a test piece of a three-phase interface to be tested, and an observation window is formed in the side face of the barrel body; the barrel cover is used for sealing the barrel body; the barrel cover is provided with a grouting hole; the data image technical equipment comprises a strain gauge, an image collector and an image analysis device, wherein the strain gauge and the image collector are in communication connection with the image analysis device, and the image analysis device is used for analyzing the bonding performance of a three-phase interface to be tested according to acquired data.
The working principle and the advantages of the invention are as follows:
according to the scheme, the three-phase interface of the anchor rod, the mortar and the rock mass is constructed in the die, so that the visual measurement of the three-phase interface of the anchor rod, the mortar and the rock mass is realized, and the local bonding destruction rule of the three-phase interface can be obtained by analyzing by combining the surface image of the test piece and the drawing test data. According to the scheme, a non-contact measurement technology is utilized, an observation window notch is reserved before pouring, and an anchor rod-mortar-rock mass local bonding interface exposed in the center of a rock mass is formed intuitively after pouring and maintenance, so that the problem that the interface damage cannot be observed directly in a traditional test and the interface bonding performance cannot be measured directly is solved, a visual test of failure and damage of an anchor rod-mortar-rock mass drawing interface can be realized, and reliable data reference is provided for the improvement of the anchorage of dangerous rock mass and side slope anchor rods and the improvement of anchor rod supporting action.
And moreover, the test device provided by the scheme is simple in structure and low in manufacturing cost, can be suitable for anchor rod tests of different types, is provided with visual observation points, is convenient for visually researching the interface change condition of anchoring to the damage process in a drawing test, and provides an effective research method for the interface damage research of a three-phase interface.
Drawings
FIG. 1 is a schematic flow chart of a method for testing the adhesion performance of a three-phase interface based on a digital image technology and an embodiment of a device;
FIG. 2 is a schematic diagram of a partial structure of a device according to a first embodiment of the method and device for testing the adhesion performance of a three-phase interface based on digital image technology;
fig. 3 is a schematic diagram of an arrangement structure of an irradiation light source according to a second embodiment of the method and apparatus for testing three-phase interface adhesion performance based on digital image technology.
Detailed Description
The following is a further detailed description of the embodiments:
the labels in the drawings of this specification include: barrel body 1, observation window 11, bung 2, slip casting hole 21, drum 3, stock 4, triangle steelframe 5.
Example 1
An example is substantially as shown in figure 2:
the three-phase interface bonding performance test device based on the digital image technology is applied to the three-phase interface bonding performance test method based on the digital image technology as described in scheme one. Including molds and digital image technology equipment.
The die comprises a cylinder 3, a barrel body 1, a barrel cover 2 and auxiliary parts; the barrel body 1 is used for accommodating a test piece of a three-phase interface to be tested; the barrel cover 2 is used for sealing the barrel body 1; and grouting holes 21 are formed in the barrel cover 2. Specifically, in this embodiment, the barrel body 1 is a steel barrel made of steel plates, the diameter of which is 800mm, and the depth of which is 1000mm, and has a simple structure and low manufacturing cost. The size of the barrel cover 2 is matched with the size of the barrel body 1; the grouting hole 21 is formed in the center of the barrel cover 2, the diameter of the grouting hole 21 is 100mm, the mold further comprises a grouting cover for sealing the grouting hole 21, the size of the grouting cover is matched with that of the grouting hole 21, a round hole with the diameter of 20mm is formed in the center of the grouting cover, and grouting is conducted through the round hole by the grouting guide pipe. By arranging the barrel cover 2 and the grouting cover, the sealing degree during mortar grouting can be ensured, and the reliability of three-phase interface construction is further ensured.
A through groove is formed in the side surface of the tub 1, and this through groove serves as the observation window 11. The condition of the constructed three-phase interface can be visually observed through the observation window 11. Specifically, the observation window 11 is located at a middle position of the length of the rock mass portion where the anchor rod 4 is embedded, and the height of the observation window 11 is 15% -20% of the height of the mold (specifically, the height of the barrel body 1 in this embodiment); the position setting of the observation window 11 is proper, so that the influence of the opening of the observation window 11 on the bonding state of the three-phase interface can be minimized, the error of test data can be controlled within an acceptable range, and higher test analysis accuracy can be achieved.
The cylinder 3 is used for drilling and grinding anchor holes in a rock mass in the subsequent step 2.1, a triangular steel frame 5 is further arranged in the barrel body 1, the triangular steel frame 5 comprises three frame bodies which are arranged at a certain angle, specifically, the angle formed by the adjacent frame bodies is 120 degrees, and the intersection point of the center lines of the three frame bodies is positioned at the center of the barrel body 1. One end of the frame body is propped against the inner wall of the barrel body 1, and the other end of the frame body is propped against the cylinder 3. The triangular steel frame 5 is used for stabilizing the cylinder 3 at the axis of the barrel body 1, so that the position of the subsequent grouting hole 21 can be always kept at the center of the barrel body 1, namely, the center of a rock mass and is perpendicular to the bottom surface of the steel barrel.
The auxiliary piece is a trapezoid wood block; and the bottom size of the trapezoid wood block is matched with the size of the observation window 11, and a semicircular notch matched with the radius of the anchor rod 4 is arranged at the top of the trapezoid wood block. The top size of the trapezoid wood block is larger than the diameter of an anchor hole in the center of the rock mass and smaller than the size of the observation window 11; the top dimension of the trapezoid wood block is smaller than the bottom dimension of the trapezoid wood block, so that the three-phase bonding interface can be fully exposed after the trapezoid wood block is taken out later. In this embodiment, the trapezoidal wood block may be a truncated cone-shaped wood block (the vertical section of which is also trapezoidal), and the truncated cone-shaped wood block is easier to be taken out than a conventional trapezoidal wood block.
The data image technology device comprises a strain gauge, an image collector and an image analysis device. The strain gauge and the image collector are in communication connection with an image analysis device, and the image analysis device is used for analyzing the bonding performance of the three-phase interface to be tested according to the acquired data. In this embodiment, the image collector may employ a CCD camera.
As shown in fig. 1, the embodiment also provides a three-phase interface bonding performance test method based on digital image technology, which comprises the following steps:
step 1: collecting material parameters of a component material of a three-phase interface to be detected; the three-phase interface is an anchor rod-mortar-rock mass three-phase interface, and the composition materials comprise anchor rods 4, mortar and rock mass.
Specifically, the material parameters of the anchor rod 4, the mortar and the rock mass are collected and determined, and in this embodiment, the collected material parameters include the anchor rod diameter, the elastic modulus, the poisson ratio, the cohesive force, the internal friction angle, the compressive strength, the tensile strength and the like, so that the subsequent combination is convenient for analyzing the bonding performance.
Step 2: and preparing a test piece of the three-phase interface to be tested.
Step 2.1: filling a fixed amount of rock mass into a mould, and prefabricating anchor holes at the top of the rock mass; an observation window 11 for observing the test piece is arranged on the die; the observation window 11 is provided on the side surface of the mold. And when filling the rock mass, an auxiliary member is placed at the observation window 11; specifically, during the rock mass filling process, an auxiliary member is embedded at the observation window 11 before the rock mass filling height is smaller than the observation window 11 height. When the auxiliary piece is embedded, namely the trapezoidal wood block is embedded, a thin adhesive tape is wrapped on the top of the trapezoidal wood block, and colorless lubricating oil is coated on the surface of the trapezoidal wood block, so that the auxiliary piece can be taken out later.
In this embodiment, the anchor hole is preformed in the cylinder 3, and after the rock mass is filled, the cylinder 3 is taken out to form a hole. Specifically, in the process of filling rock, firstly, filling a fixed amount of rock into a barrel body 1, after filling part of rock, compacting a bottom layer rock, putting a cylinder 3 and an auxiliary piece into the barrel body 1 after compacting the bottom layer rock, and sleeving a triangular steel frame 5 to ensure that the cylinder 3 is always kept in the center of the rock and is perpendicular to the bottom surface of the barrel body 1, wherein the bottom of the auxiliary piece is attached to the cylinder 3; and filling the rock mass and compacting until the compacted rock mass is flush with the upper top surface of the barrel body 1. And then the barrel cover 2 is covered and fixed, the grinding cylinder 3 is slowly rotated and taken out, and then an anchor hole with the diameter of 100mm is formed. And after the anchor rod 4 is vertically placed in the anchor hole, the auxiliary piece is pushed to approach the axis of the barrel body 1 until the bottom of the auxiliary piece is embedded with the anchor rod 4.
In addition, the strain gauge is attached to the side face of the rock mass, the test sensor is arranged on the hole wall face of the anchor hole in the center of the rock mass, and before the test sensor is arranged, the test sensor is calibrated in advance, so that the follow-up force measurement accuracy is guaranteed.
Specifically, in the embodiment, 8 strain gages are respectively fixed on the rock body along the axial direction of the rock body at intervals of 100mm, and 8 strain gages are placed at positions, symmetrically clinging to the rock body, on two sides of an anchor hole, 16 strain gages are added, so that strain information of the rock body can be fully acquired.
The test sensor arranged in the embodiment is an HT-201 high-temperature film pressure sensor, and can truly measure the contact pressure between mortar and rock mass. When the sensor is calibrated, all parts of the calibration test system are connected according to a wiring method, and the sensor is placed on the calibration device to enable the front face of the sensor to be stressed. And secondly, preloading, namely loading 5 cycles from 0 to 110% of full range, and keeping for 3 seconds when loading to 110% of full range. Then loading is carried out, the full range is divided into 5 equal division points from 0, continuous loading stress is carried out, and in the test, if the estimated stress is within 50N, the 50N is divided into five equal divisions, and the loading stress is carried out by 0, 10N, 20N, 30N, 40N and 50N in sequence.
Through data acquisition, the voltage value output by the loading stress value is recorded, the voltage value and the loading stress value are correspondingly input into fitting software for fitting, and after the loading point is reached each time, the voltage value is stabilized for 3 seconds and then measured. After fitting, a once fitting function is obtained, coefficients of the fitting function are input into a data acquisition system, and finally display units of the data acquisition system are modified into KPa, so that stress values of each point are directly obtained. And the calibration of the test sensor is finished, so that more accurate contact pressure data can be obtained later.
Step 2.2: setting the anchor rod 4 at the anchor hole and injecting mortar into the mold; and taking out the auxiliary piece after the mortar is solidified.
Specifically, in step 2.2, the following sub-steps are included:
sub-step 1: placing an anchor rod 4 at an anchor hole at the top of the rock mass; and the bottom of the auxiliary is engaged with the anchor rod 4.
And before the anchor rod 4 is placed into the anchor hole, the inside of the anchor rod 4 is grooved, a strain gauge is attached, and the inside of the anchor rod 4 is grooved for sealing and welding. And after the anchor rod 4 is placed in the anchor hole, the position of the inner slotting of the anchor rod 4 corresponds to the position of the observation window 11.
Sub-step 2: and closing the anchor holes and injecting mortar into the mold.
Sub-step 3: after the mortar has set, the auxiliary element is removed. Specifically, when the auxiliary piece is taken out, namely after grouting for 8-10 hours, mortar is solidified at the moment, and the auxiliary piece is slowly moved and pulled out from the observation window 11 directly; because the surface of the auxiliary piece is isolated by adopting the adhesive tape and the lubricating oil before the auxiliary piece is embedded, the auxiliary piece is easy to take out.
At this time, the three-phase interface of the formed anchor rod, mortar and rock mass can be visually observed at the observation window 11 after the auxiliary member is taken out.
Step 3: digital image technology equipment is provided.
Specifically, the setting process in this embodiment includes placing the image collector, i.e., the CCD camera, so that the lens center of the camera is perpendicular to the local three-phase interface formed by the test piece to facilitate photographing. And is connected with the image collector and the image analysis device.
Step 4: spraying speckle particles at the observation window 11; and acquires an image of the surface of the test piece at the observation window 11.
Specifically, the speckle particles sprayed in this embodiment are black speckle particles; by adopting the particles, the speckle color is obviously compared with the three-phase interface background, and the observation is more convenient. And a random spraying mode is adopted during spraying, so that the test result is more reliable.
Step 5: and (5) carrying out a drawing test on the anchor rod 4 by adopting an anchor rod 4 drawing instrument, and recording drawing test data. Here, the recorded drawing test data includes an image of the surface of the test piece at the observation window 11 during the drawing test.
Specifically, an image of the surface of the test piece at the observation window 11 (i.e., the surface image of the local three-phase interface formed by the test piece) is acquired using an image acquisition device. After the drawing test is started, the camera acquires the surface image of the test piece in real time and transmits the surface image to the image analysis device; before the start of the drawing test (in this embodiment, in step 3), the surface image of the test piece is acquired by a camera and transmitted to the image analysis device.
Step 6: and (3) analyzing and obtaining the local bonding failure rule of the three-phase interface based on the surface image of the test piece and the drawing test data obtained in the step (3).
Specifically, the local bond destruction rule of the three-phase interface is obtained by analysis of an image analysis device by adopting a DIC method.
Wherein, the DIC method refers to digital image correlation techniques; the non-contact optical measurement method is characterized in that a binocular stereo vision technology is used, speckle images of the surface of an object are tracked, digital speckle images of the surface of the object to be measured before and after deformation are shot by a camera, the position changes of geometric points of sub-intervals corresponding to the digital speckle images are compared, the geometric points corresponding to the object before and after deformation are determined by an optimization algorithm, and finally information such as full-field strain, displacement, amplitude and the like is obtained.
Specifically, the image analysis device digitizes the surface image data to obtain digital images, and further, each digital image is divided into a gray scale array of m×n pixels and stored in the image analysis device, and an image recorded before the start of the pull-out test is taken as a "reference image" and each image recorded in real time after the start of the pull-out test is taken as a "target image".
And (3) taking out a point (x, y) to be calculated from the rectangular image subregion of (2n+1) x (2n+1), searching a target subregion corresponding to the reference subregion in the deformed digital image by utilizing the gray level distribution of the speckle image, calculating according to a correlation function, and judging whether the searched target subregion corresponds to the reference subregion or not.
Wherein,,
is a gray level distribution function of the reference subinterval; />
Is the gray scale distribution function of the target subregion.
And then, introducing the obtained series of speckle images into a VIC-2D analysis system arranged in an image analysis device, corresponding a reference subarea before the speckle digital image is deformed to a target subarea after the speckle digital image is deformed, and calculating a strain field and a displacement field of a region required by a test by using a Newton-Lafei iterative algorithm. And combining the strain field and the displacement field to obtain the three-phase interface bonding performance of the anchor rod-mortar-rock mass through analysis.
The three-phase interface bonding performance test method and device based on the digital image technology, provided by the embodiment, adopt the method of internally attaching the strain gauge to collect relevant test parameters, can be suitable for different anchor rod 4 types, and has good universality. Meanwhile, in the structural arrangement of the test device, the compressive stress of the barrel cover 2 acts on the barrel body 1, so that the influence of the compressive stress of the loading end reaction frame on the bonding state in the process of drawing test and the like in the test process is reduced, and more real, more reliable and less-error test data can be obtained; the arrangement of the observation window 11 can obviously observe the interface destruction process under the condition of reducing the destruction interface adhesion state, and further accurately analyze and obtain the three-phase interface adhesion performance, and the evaluation accuracy of the adhesion performance is higher.
In addition, the scheme is used for carrying out an adhesive property test on the three-phase interface of the anchor rod-mortar-rock mass in the application of the anchor rod anchoring technology, can carry out overall process record on failure and damage of the three-phase interface of the anchor rod-mortar-rock mass in the drawing process of the anchor rod 4 based on the digital image technology, reveals a failure mechanism of the drawing interface of the rock mass anchor rod 4, and realizes a visual test on failure and damage of the drawing interface of the anchor rod-mortar-rock mass, thereby providing related suggestions for the anchors of dangerous rock mass and the side slope anchor rod 4, fully playing the role of supporting the anchor rod 4, and further analyzing the adhesive sliding relation of the anchor rod-mortar-rock mass adopted at the present time through test results obtained by the test device.
More importantly, the test device and the test method provided by the scheme can truly restore the actual interface form formed by the anchor rod body, the mortar and the rock mass in the anchor rod support, the construction step of the test piece is matched with the formation process of the firm grouting layer in the anchor rod support process, the opening position of the anchor hole is positioned at the center of the rock mass, the anchor rod 4 is arranged in the anchor hole, and the setting position of the anchor rod 4 is matched with the condition of the peripheral rock mass of the anchor body in the actual anchor rod 4 support; the reliable test piece with actual reference value can be formed, and the three-phase interface obtained by construction is real and reliable. Compared with the conventional interface performance test scheme, the conventional scheme is characterized in that the anchor hole is arranged at the edge of the rock mass and is matched with a transparent mold for interface observation, and the constructed interface is convenient to visualize, but the interface construction is actually different from the interface condition in the real anchor bolt support, and the mechanical performance at the interface is not high in reality, so that the reference value of test data is low.
In this scheme, a real three-phase interface is constructed, an observable effect of the three-phase interface is realized by arranging the observation window 11 and matching with the auxiliary member, the conventional experimental thinking is often limited by worry about the bonding state of the interface, the window is not directly arranged, the observation position (such as the position of the auxiliary member in this scheme) is reserved in the structure of the experimental member, and the construction of the bonding state of the interface is also destroyed during the arrangement. The scheme overcomes the observation difficulty, the influence of the opening of the observation window 11 on the bonding state of the three-phase interface can be minimized by accurately controlling the position of the observation window 11 and the opening area of the observation window 11, and the real-time adding and taking out of auxiliary parts in the test method are matched, so that the test visual observation position capable of retaining the real three-phase interface state can be constructed, the interface change condition of the anchoring to the damage process can be intuitively researched in the test, and an effective and accurate research method is provided for the interface research of the three-phase interface.
Example two
Based on the first embodiment, the light source device is added in the data image technical equipment, and the light error correction module is added in the image analysis device.
The light source arrangement comprises a light-sensitive sensor and an illumination light source. The irradiation light source is used for illuminating the surface of the test piece. Specifically, in this embodiment, two illumination light sources are disposed towards the observation window 11, as shown in fig. 3, one illumination light source is disposed at a position 45 degrees obliquely upward of the observation window 11, and the other illumination light source is disposed at a position 45 degrees obliquely downward of the observation window 11. The light sensing sensor is used for sensing light information and transmitting the light information to the light error correction module; the light information includes ambient light information and surrounding light information at the observation window 11. Specifically, in this embodiment, there are 4 light-sensing sensors, and the light-sensing sensors are respectively disposed on the periphery of the barrel body 1, which is close to the observation window 11; by the arrangement, the light intensity information of the periphery of the observation window 11 can be acquired by the light sensor so as to analyze the uniformity of light rays at the observation window 11.
The light error correction module is used for confirming a light error value according to a comparison strategy according to light information and correcting the brightness of the surface image of the test piece according to the light error value so as to keep the brightness of the image uniform. The comparison strategy includes: comparing the light intensity of the light around the observation window 11 in the peripheral light information; if the light intensity of the surrounding light is consistent, confirming that the light error value is 0; if the light intensity of the peripheral light is inconsistent, the light intensity of the peripheral light with the largest light intensity is taken as a reference, and the difference value between the light intensity of the other peripheral light and the reference is confirmed, wherein the difference value is the light error value. Further, the light error correction module adjusts the brightness of the surface image of the test piece according to the confirmed light error value, and an adjusting mode adopted in the embodiment comprises: dividing the image area corresponding to each peripheral ray to be projected and illuminated, and adjusting the overall brightness of the corresponding image area based on the ray error value.
The embodiment also provides a three-phase interface bonding performance test method based on the digital image technology, and the step 5 is adjusted based on the first embodiment. In step 5, the image analysis device corrects the surface image of the test piece by the light error correction module before digitizing the surface image data.
According to the three-phase interface bonding performance test method and device based on the digital image technology, light information can be sensed and corrected, the surface of a test piece is enabled to be equivalently under uniform illumination, and then the surface image of the test piece which is the most realistic and less affected by illumination conditions can be restored and obtained, so that the follow-up image analysis accuracy and bonding performance analysis reliability can be improved. The method and the device have the advantages that test light information is particularly focused, the light information is carefully processed, in an actual test environment, the surface image of the test piece is used as key test data, the acquisition accuracy of the test piece is also the test quantity which needs to be focused, the image information is used as data which is extremely easy to be influenced by light, the deviation of the light is easy to cause the deviation of image identification, so the control of the test light is extremely important, the point which is not considered in the conventional test setting is often the point, and only a light source is provided for illuminating the test piece.
Example III
Based on the digital image technology, a light source adjusting mechanism is additionally arranged in the light source device.
The light sensing sensor further comprises an environment light sensing sensor arranged on the upper surface of the barrel cover 2, and the environment light sensing sensor is used for collecting environment light information of the environment where the test device is located so as to analyze the influence of environment light on possible existence of the irradiation light source. The light source adjusting mechanism comprises an angle adjusting module and a brightness adjusting module. In this embodiment, the angle adjustment module is a conventional angle adjustment module, which is used to adjust the irradiation angle of the irradiation light source. The brightness adjusting module can be integrally arranged in the irradiation light source and is used for adjusting the irradiation light intensity of the irradiation light source.
The angle adjusting module and the brightness adjusting module are in communication connection with the light sensing sensor. The brightness adjusting module is used for comparing the ambient light information with the surrounding light information, and controlling and increasing the irradiation light intensity of the irradiation light source if the ambient light intensity is greater than the surrounding light intensity. The angle adjusting module also calls peripheral light information, and adjusts the irradiation angle of the irradiation light source when the light intensity of the peripheral light is inconsistent, so that the light intensity of the peripheral light tends to be consistent.
According to the three-phase interface bonding performance test method and device based on the digital image technology, intelligent adjustment can be performed on the irradiation light source so as to ensure irradiation uniformity of the test piece, influence of the irradiation light source on the surface of the test piece can be effectively reduced, and accuracy of bonding performance analysis is improved.
The foregoing is merely an embodiment of the present invention, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present invention, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (8)
1. The three-phase interface bonding performance test method based on the digital image technology is characterized by comprising the following steps of:
step 1: collecting material parameters of a component material of a three-phase interface to be detected; the three-phase interface is an anchor rod-mortar-rock mass three-phase interface, and the composition materials comprise anchor rods, mortar and rock mass;
step 2: preparing a test piece of a three-phase interface to be tested;
step 2.1: filling a fixed amount of rock mass into a mould, and prefabricating anchor holes at the top of the rock mass; an observation window for observing the test piece is arranged on the die; when the rock mass is filled, an auxiliary piece is placed at the observation window;
step 2.2: setting an anchor rod at an anchor hole, and injecting mortar into a mold; and taking out the auxiliary parts after the mortar is solidified;
step 3: setting digital image technology equipment;
step 4: spraying speckle particles at the observation window; collecting the surface image of the test piece at the observation window;
step 5: carrying out a drawing test on the anchor rod and recording drawing test data;
step 6: and (3) analyzing and obtaining the local bonding failure rule of the three-phase interface based on the surface image of the test piece and the drawing test data obtained in the step (3).
2. The method for testing the adhesion performance of a three-phase interface based on the digital image technology according to claim 1, wherein the speckle particles are black speckle particles.
3. The method for testing the adhesion performance of the three-phase interface based on the digital image technology according to claim 1, wherein the observation window is arranged on the side surface of the die.
4. A method of testing the adhesion performance of a three-phase interface based on digital image technology according to claim 3, wherein the observation window is located at the middle position of the length of the rock mass embedded part of the anchor rod, and the height of the observation window is 15% -20% of the height of the mould.
5. The method for testing the adhesion performance of the three-phase interface based on the digital image technology according to claim 1, wherein in the step 2.1, in the process of filling the rock mass, an auxiliary piece is embedded at the observation window before the filling height of the rock mass is smaller than the height of the observation window;
in step 2.2, the following sub-steps are included:
sub-step 1: placing an anchor rod in an anchor hole at the top of the rock mass; and the bottom of the auxiliary piece is embedded with the anchor rod;
sub-step 2: closing the anchor holes and injecting mortar into the mold;
sub-step 3: after the mortar has set, the auxiliary element is removed.
6. The method for testing the bonding performance of the three-phase interface based on the digital image technology according to claim 5, wherein in the substep 1, before the anchor rod is placed into the anchor hole, the inside of the anchor rod is grooved, a strain gauge is attached, and sealing welding is carried out on the inside groove of the anchor rod; and after the anchor rod is placed in the anchor hole, the position of the inner slotting of the anchor rod corresponds to the position of the observation window.
7. A three-phase interface bonding performance test device based on a digital image technology, which is characterized by being applied to the three-phase interface bonding performance test method based on the digital image technology as set forth in any one of claims 1 to 6; comprises a mould and digital image technical equipment; the die comprises a barrel body and a barrel cover; the barrel body is used for accommodating a test piece of a three-phase interface to be tested, and an observation window is formed in the side face of the barrel body; the barrel cover is used for sealing the barrel body; the barrel cover is provided with a grouting hole; the data image technical equipment comprises a strain gauge, an image collector and an image analysis device, wherein the strain gauge and the image collector are in communication connection with the image analysis device, and the image analysis device is used for analyzing the bonding performance of a three-phase interface to be tested according to acquired data.
8. The digital image technology based three-phase interface adhesion performance test apparatus of claim 7, further comprising an auxiliary; the auxiliary piece is a trapezoid wood block; and the bottom of the trapezoid wood block is matched with the observation window in size, and a semicircular notch matched with the radius of the anchor rod is formed in the top of the trapezoid wood block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310057449.0A CN116087094B (en) | 2023-01-16 | 2023-01-16 | Three-phase interface bonding performance test method and device based on digital image technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310057449.0A CN116087094B (en) | 2023-01-16 | 2023-01-16 | Three-phase interface bonding performance test method and device based on digital image technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116087094A true CN116087094A (en) | 2023-05-09 |
| CN116087094B CN116087094B (en) | 2024-07-02 |
Family
ID=86207921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310057449.0A Active CN116087094B (en) | 2023-01-16 | 2023-01-16 | Three-phase interface bonding performance test method and device based on digital image technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116087094B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706730A (en) * | 2012-06-12 | 2012-10-03 | 中国科学院武汉岩土力学研究所 | Two-dimensional visualized test device of work mechanism of anchoring system |
| CN103528950A (en) * | 2013-10-31 | 2014-01-22 | 闫楠 | Method for testing bonding strength between anchor rod anchoring body and weathered rock mass |
| JP2016205025A (en) * | 2015-04-24 | 2016-12-08 | 株式会社ダイクレ | Positioning metal fitting of pressure receiving structure |
| CN106638718A (en) * | 2016-10-19 | 2017-05-10 | 湖南工程学院 | Method for measuring full-length cohesive soil anchorage de-bonding length and dynamic anchorage force |
| CN109540788A (en) * | 2018-12-03 | 2019-03-29 | 湖南大学 | Simulation ground pressure acts on the test method and system of lower ground and anchoring body adhesive property |
| CN111024028A (en) * | 2020-01-10 | 2020-04-17 | 兰州理工大学 | Laying device for earthen site slurry-soil interface strain gauge and using method |
| CN111220465A (en) * | 2020-01-22 | 2020-06-02 | 长安大学 | Visual test method for interface deformation of soft rock anchoring body |
-
2023
- 2023-01-16 CN CN202310057449.0A patent/CN116087094B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706730A (en) * | 2012-06-12 | 2012-10-03 | 中国科学院武汉岩土力学研究所 | Two-dimensional visualized test device of work mechanism of anchoring system |
| CN103528950A (en) * | 2013-10-31 | 2014-01-22 | 闫楠 | Method for testing bonding strength between anchor rod anchoring body and weathered rock mass |
| JP2016205025A (en) * | 2015-04-24 | 2016-12-08 | 株式会社ダイクレ | Positioning metal fitting of pressure receiving structure |
| CN106638718A (en) * | 2016-10-19 | 2017-05-10 | 湖南工程学院 | Method for measuring full-length cohesive soil anchorage de-bonding length and dynamic anchorage force |
| CN109540788A (en) * | 2018-12-03 | 2019-03-29 | 湖南大学 | Simulation ground pressure acts on the test method and system of lower ground and anchoring body adhesive property |
| CN111024028A (en) * | 2020-01-10 | 2020-04-17 | 兰州理工大学 | Laying device for earthen site slurry-soil interface strain gauge and using method |
| CN111220465A (en) * | 2020-01-22 | 2020-06-02 | 长安大学 | Visual test method for interface deformation of soft rock anchoring body |
Non-Patent Citations (2)
| Title |
|---|
| LAURA BLANCO MARTÍN等: "《Assessment of the bolt-grout interface behaviour of fully grouted rockbolts from laboratory experiments under axial loads 》", 《INTERNATIONAL JOURNAL OF ROCK MECHANICS & MINING SCIENCES》, 16 July 2012 (2012-07-16), pages 50 - 61 * |
| 张浩: "《锚杆支护技术及工程应用》", 《岩土工程与地下工》, 31 December 2012 (2012-12-31), pages 90 - 95 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116087094B (en) | 2024-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107179396B (en) | Multifunctional assembled geotechnical engineering physical similarity test system | |
| CN105865365B (en) | Soil deformation distributed optical fiber sensing is demarcated and test method and its device | |
| CN101078220B (en) | Soft soil roadbed settlement monitoring method and device | |
| CN109405764B (en) | Automatic deformation monitoring system based on laser ranging | |
| CN109085070B (en) | Visual test device and method for shear characteristic research of soil and structure | |
| CN114282375A (en) | Hypergravity model test device and method for simulating progressive instability of shield excavation face | |
| CN106595918A (en) | Long-term monitoring apparatus and method for soil pressure outside duct piece of shield tunnel | |
| CN108982265B (en) | Experimental device for pile soil shearing action is observed and is measured based on PIV technique | |
| CN110850060A (en) | Visual porous grouting test device and test method thereof | |
| CN106759547B (en) | Integral Abutment, pile foundation and soil interaction pseudo-static experimental measuring device and its installation method | |
| CN107063108A (en) | It is a kind of to test sensing optic cable and the method for soil deformation harmony | |
| CN103644892A (en) | Measuring device and method for layered settlement of soil body of deep foundation pit | |
| CN109060534A (en) | A kind of transparent native experimental rig of simulation tunnel excavation face unstability | |
| CN116087094B (en) | Three-phase interface bonding performance test method and device based on digital image technology | |
| CN105780827A (en) | Device and method for monitoring disengagement of sluice floor slab of deep and soft foundation | |
| CN105926683B (en) | Method for detecting pile foundation post grouting quality by using distributed optical fiber temperature measurement technology | |
| CN109797786A (en) | Excavation of foundation pit model test apparatus and application method based on earth's surface water penetration | |
| CN101270972A (en) | Soil body internal deformation testing device | |
| CN105908789B (en) | Method for comprehensively detecting pile foundation post-grouting quality by applying cable heating and optical fiber temperature measurement | |
| Wang et al. | Investigation of less temperature-sensitive Fiber Bragg Grating strain sensor in pile jacking field test | |
| CN205655803U (en) | Soil deformation distributed optical fiber monitoring is markd and test device | |
| CN115165614A (en) | Tester and testing method for shear creep of contact surface of frozen soil and steel plate | |
| CN113791068A (en) | Tunnel bottom continuous grouting lifting model test device | |
| CN113791174A (en) | Tunnel bottom grouting jacking model test device and test method | |
| CN113758919A (en) | Tunnel bottom grouting model test device and test method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |