CN117571698B - Filling type saturation detection method - Google Patents
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000011049 filling Methods 0.000 title claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 103
- 238000000034 method Methods 0.000 claims abstract description 53
- 238000012545 processing Methods 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims abstract description 17
- 238000004040 coloring Methods 0.000 claims description 48
- 239000007921 spray Substances 0.000 claims description 35
- 239000011800 void material Substances 0.000 claims description 29
- 239000002002 slurry Substances 0.000 claims description 25
- 239000003153 chemical reaction reagent Substances 0.000 claims description 20
- 238000004364 calculation method Methods 0.000 claims description 14
- 239000004567 concrete Substances 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims description 11
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 4
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- 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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
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- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- 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
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Abstract
The invention discloses a filling type saturation detection method, which relates to the technical field of grouting effect test. The panoramic camera and the image processing system are used for replacing manual work, so that subjectivity and uncertainty of manual naked eye observation are reduced, and detection precision is improved. Compared with the traditional normative on-site detection method, the method has the advantages that the engineering variability is small, the operation process is relatively simple, the detection efficiency is high, the cost is low, the benefit cost ratio is high, and the practicability is high, compared with the method for detecting the quality of each core sample before and after grouting by using the traditional normative on-site detection method, the method only needs to detect the same core sample after grouting.
Description
Technical Field
The invention relates to the technical field of grouting effect testing, in particular to a grouting saturation detection method.
Background
The existing pavement is mainly divided into asphalt concrete pavement and cement concrete pavement, and the pavement structure forms of the asphalt concrete pavement and the cement concrete pavement have the defects although the pavement structure forms are thousands of years. Over time, under the influence of conditions such as heavy load, humidity and climate environment of a vehicle, diseases such as rutting, cracks, pushing, loosening and water damage appear on an asphalt concrete pavement, and diseases such as plate bottom void, staggering and mud pumping appear on a cement concrete pavement, so that the road service performance and the driving safety are influenced. To overcome the defects of the traditional road types, a semi-flexible road surface with the advantages of the two road types is generated.
The Semi-flexible pavement (Semi-flexible pavement) is a composite pavement structure which is prepared by pouring cement mortar with high fluidity into a large-gap matrix asphalt mixture, and forming material strength through mutual embedding and extrusion actions among aggregates and pouring materials together, so that the load resistance of a structural layer is improved, and the composite pavement structure has the characteristics of hardness, softness and combination. The semi-flexible pavement belongs to a skeleton compact structure, and has good rutting resistance, water damage resistance, low-temperature crack resistance, durability and the like, unlike a common asphalt concrete pavement. On the other hand, due to the existence of the asphalt film, the flexibility of the semi-flexible pavement is superior to that of the cement concrete pavement, and joints can be omitted, so that the construction amount is reduced, and the travelling comfort is ensured.
The semi-flexible pavement adopts a pouring construction method and mainly comprises two stages of paving of a matrix asphalt mixture and pouring of cement mortar. The cement paste is poured into the holes, so that the capability of the structural layer against the load effect is improved. In the construction process, the porosity and the asphalt content of the matrix asphalt mixture are strictly controlled, the pouring of cement mortar is particularly important, and the pouring saturation of cement can directly influence the road performance of semi-flexible pavement.
At present, a uniform and systematic evaluation method for on-site inspection of grouting effect of semi-flexible concrete grouting cement is not formed. The traditional normative grouting effect detection method adopts calculation of poor quality of the concrete test piece before and after grouting. The newer technology at the present stage adopts:
1. patent application number: CN201910930037.7
CT scanning is carried out on the grouted Marshall test piece, so that a three-dimensional structure of the asphalt mixture is obtained, and the grouting effect of the poured concrete is evaluated by adopting a two-index evaluation method. Selecting a cube range of 60mm multiplied by 60mm as a study object, and calculating the void volume and the slurry volume as one index; and (3) obtaining a slurry distribution structure of the test piece and a structural model except for asphalt mixture solids by using a 3D printing technology, measuring the resistance values of the slurry distribution structure and the structural model, and taking the ratio of the slurry distribution structure to the structural model as another index for evaluating grouting effect.
2. Patent application number: CN202020840505.X
The manual half-air pressure sleeve grouting saturation detector can directly exhaust air through the needle cylinder, and the air exhaust display volume of the needle cylinder, namely the grouting filling defect volume, can directly read the volume of the air exhaust cavity according to the condition that the air exhaust display volume of the needle cylinder reaches 1/2 of the instant atmospheric pressure in the ideal state of the needle cylinder, so that the grouting saturation is measured.
3. Patent application number: CN202121332669.2
Adopt a plurality of settings to wait to grout in the hole and along waiting to grout the pressure detection module that hole depth direction laid and with a plurality of the monitoring module that pressure detection module is connected, wherein pressure detection module carries out wireless communication through wireless communication and monitoring computer, and monitoring module includes main wireless communication module and the display screen that monitoring computer connects, forms a grout saturation intelligent detection system, can realize the detection of different degree of depth grout pressure, avoids cavity and the crack that produces in the grouting process to influence the grout saturation, realizes intelligent monitoring.
4. Patent application number: CN202110324709.7
The method comprises the steps of decomposing a reinforcing steel bar sleeve excitation feedback waveform through a wavelet, then carrying out box dimension analysis on the decomposed waveform by utilizing a fractal principle, extracting fractal feature vectors describing defect features, carrying out analysis and discrimination by utilizing a neural network, and outputting grouting defect type and density information.
Although these approaches can achieve the detection purpose, there are certain drawbacks:
firstly, according to the traditional detection method for the standard grouting material pouring rate test, core sample test pieces are drilled on the pavement before and after grouting, the quality difference before and after grouting is calculated to determine the communication void ratio, due to engineering variability in the grouting process, certain errors exist, the actual grouting effect cannot be accurately reflected, and the accuracy of the measurement result needs to be improved. Secondly, although the existing CT scanning and 3D printing detection method improves the traditional method, the detection process is more visual and data, visual and clear, but the detection needs to rely on specialized equipment, the cost is more expensive, the operation flow is complex, the uncertain factors are more, the detection efficiency is low, and the existence of radiation can cause irreversible damage to human bodies. The intelligent monitoring system can detect grouting saturation through indirectly measuring pressure values although detecting grouting pressures of different depths of concrete, and the pressure sensor has the defects of poor stability, high cost and the like. The manual semi-pneumatic method and the sleeve grouting intelligent detection method are more suitable for detecting the grouting saturation of a complete space, and have low pertinence to the detection of the grouting saturation of a complex gap of an asphalt concrete material, and are difficult to directly detect. At present, a filling grouting saturation detection method which is simple to operate, is specific to on-site acceptance or detection and has high efficiency and economy is not available.
Disclosure of Invention
The invention aims to provide a filling type saturation detection method aiming at the defects of the prior art, so as to solve the problems that the filling type saturation detection method which is simple to operate, is used for on-site acceptance or detection and has high efficiency and economy does not exist at present.
The invention provides a filling type saturation detection method, which is applied to a filling type saturation detection device, wherein the filling type saturation detection device comprises the following steps: transparent coloring box, high-pressure spraying device and panoramic camera; the transparent coloring box is internally provided with two rotary lifting devices, a test piece table is arranged on the rotary lifting devices, a test piece table control button and a panoramic camera control button are arranged outside the transparent coloring box, and the test piece table control button is used for controlling the rotary lifting devices to move so as to realize the rotation, lifting and horizontal movement of the test piece table; the two test piece tables are respectively used for placing a test piece and a panoramic camera, and a detachable baffle is arranged between the two rotary lifting devices; the panoramic camera control button is used for controlling the panoramic camera to collect images of a test piece;
the high pressure spray apparatus includes: reagent bottle, transfer line, compressed air inlet, pressure regulating valve, high-pressure pump, accumulator, filter, stop valve, high-pressure hose, side nozzle and upper nozzle; the reagent bottle is connected with the high-pressure pump through a perfusion tube, the high-pressure pump is provided with a compressed air inlet, and the compressed air inlet is provided with a pressure regulating valve; the high-pressure pump is connected with an accumulator, the accumulator is connected with a filter, the filter is connected with the stop valve, the stop valve is connected with a side spray head and an upper spray head through high-pressure hoses respectively, and the side spray head and the upper spray head are respectively arranged on the transparent coloring box and are positioned on the side part and the upper part of a test piece table for placing a test piece; a lamp strip is arranged above the transparent coloring box;
the method comprises the following steps:
step one: placing a core extractor on the semi-flexible pavement to be detected, and drilling a core sample on the semi-flexible pavement by using the core extractor to obtain a cylindrical test piece; demolding the whole test piece, and cutting along the cross section of the test piece by adopting a cutting machine to obtain an upper round piece, a middle round piece and a lower round piece;
step two: coating the propylene filler to the gap of the surface to be tested of the test piece by adopting a fine brush;
step three: preparing 1% phenolphthalein alcohol reagent as a colorant, and pouring the colorant into a reagent bottle for standby;
step four: sequentially placing the upper round piece, the middle round piece and the lower round piece on a test piece table, respectively coloring the two tangent plane wafers of the middle round piece and the three cylindrical surfaces of the upper round piece, the middle round piece and the lower round piece by using the side spray heads and the upper spray heads through spraying coloring agents, and observing the color change of the test piece after the spraying is finished;
step five: after the concrete slurry in the sprayed test piece turns into pink, scanning the tested piece by using a panoramic camera to obtain a two-dimensional picture, guiding the picture into an image processing system, counting picture coloring and residual communicated void areas by using the image processing system, calculating and counting the color situation, displaying the measurement result data on an image processing interface after calculation and processing, and taking the calculated saturation as an index for evaluating grouting effect.
Further, in the first step, if the core sample surface has obvious defects, the core sample should be re-drilled.
Further, the first step further includes: and (3) carrying out ash removal on the cut test piece, and cleaning surface impurities.
Further, the second step further includes: and (3) wiping off the excessive pigment by using mineral alcohol or turpentine, and polishing off residual filling materials by using sand paper after the acrylic pigment filling materials are solidified and molded.
In the fifth step, when the cylindrical surface image is acquired, the height of the test piece table is adjusted according to the actual situation, the image acquisition is complete, then under the action of the rotary lifting device, the test piece is enabled to perform horizontal movement and rotary movement simultaneously, the panoramic camera performs horizontal movement matched with the moving speed of the test piece, and a two-dimensional picture is acquired.
In the fifth step, the Image processing system uses Image J with an Image resolution of 1024×513, and automatically calculates the pixel area of the calibrated area through measurement software: let the color paste area be S1, the void area after grouting be S2, the saturation be D, pass d=And (5) obtaining a grouting saturation index by using the X100%.
Further, the method further comprises: the weight is set for calibration according to the following method:
the area of the tangent circle 1 is S3, the area of the coloring slurry is S4, the area of the gap is S5, and the saturation is D3;
the area of the tangent circle 2 is S6, the area of the coloring slurry is S7, the area of the gap is S8, and the saturation is D4;
the cylindrical surface of the upper circular piece is unfolded to be S9, the slurry coloring area is S10, the gap area is S11, and the saturation is D5;
the cylindrical surface unfolding area of the middle circular piece is S12, the slurry coloring area is S13, the void area is S14, and the saturation is D6;
the cylindrical surface unfolding area of the lower circular piece is S15, the slurry coloring area is S16, the void area is S17 and the saturation is D7;
the saturation D of the whole test piece is determined by an area weighting method, wherein the area weighting is as follows: a=s3/(s3+s6+s9+s12+s15); b=s6/(s3+s6+s9+s12+s15); c=s9/(s3+s6+s9+s12+s15); d=s12/(s3+s6+s9+s12+s15); e=s15/(s3+s6+s9+s12+s15); the overall specimen grouting saturation d=d3×a+d4×b+d5×c+d6×d+d7×e was calculated.
Further, the method further comprises: in the indoor test, core sample test pieces are drilled on the road surface distribution before and after grouting, and the volumes of the molded 5 core sample test pieces are respectively measuredVolume of mixture and closed void->Mass of test pieces in water ∈>Mass of test piece in air ∈>The method comprises the steps of carrying out a first treatment on the surface of the Connectivity void fraction->X 100%, where，/>For the density of water, 1.0g/cm of the water is generally taken at normal temperature; grouting material filling rate->X 100%, itMiddle->For communicating void ratio before grouting, the method is characterized in that>The void ratio is communicated after grouting; obtaining the actual measurement pouring rate of 5 core sample test pieces after calculation, and respectively obtaining 5 grouting saturation levels of the 5 grouted core sample test pieces after final calculation according to the steps one to five; after linear fitting, establishing a relation between the two, fitting by adopting a primary function, and after regression fitting, obtaining a function expression: y=1.000547x+0.019433; wherein x is a calculated value obtained according to the methods from the first step to the fifth step, and y is a true value; after calibration, the correction relation between the calculated value and the true value can be determined, so that more accurate grouting saturation is obtained and used as an index for evaluating grouting effect.
The invention has the beneficial effects that: according to the filling type saturation detection method provided by the invention, the principle that the phenolphthalein solution changes color when encountering alkaline substances is utilized, after a test piece to be detected is uniformly cut, filled with gaps and colored, a high-pressure spraying device and a lifting adjusting device are utilized, and a reagent is sprayed out by a fine spray head after being filtered by a filter, so that the reagent is uniformly and effectively colored. The panoramic camera and the image processing system are used for replacing manual work, so that subjectivity and uncertainty of manual naked eye observation are reduced, and detection precision is improved. Compared with the traditional normative on-site detection method, the method has the advantages that the engineering variability is small, the operation process is relatively simple, the detection efficiency is high, the cost is low, the benefit cost ratio is high, and the practicability is high, compared with the method for detecting the quality of each core sample before and after grouting by using the traditional normative on-site detection method, the method only needs to detect the same core sample after grouting.
Drawings
For a further understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention and to the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.
In the drawings of which there are shown,
FIG. 1 is a perspective view of a post-coring test piece in an embodiment of the present invention;
FIG. 2 is a cut-away schematic perspective view of an embodiment of the present invention;
FIG. 3 is a perspective view of an embodiment of an infusion saturation detection apparatus;
FIG. 4 is a front view of an embodiment of an infusion saturation detection apparatus;
FIG. 5 is a top view of an embodiment of an apparatus for detecting saturation;
FIG. 6 is a partial detail perspective view of a high pressure spray apparatus in accordance with an embodiment of the present invention;
FIG. 7 is a perspective view of a panoramic camera in accordance with an embodiment of the present invention;
FIG. 8 is a graph of a data calibration fit for an embodiment of the present invention.
Illustration of: 1-a reagent bottle; 2-a transfusion tube; 3-compressed air inlet; 4-a pressure regulating valve; 5-high pressure pump; 6-an accumulator; 7-a filter; 8-a stop valve; 9-a bracket; 10-high pressure hose; 11-side spray heads; 12-upper spray head; 13-a transparent coloring box; 14-a test piece; 15-a test piece table; 16-a rotary lifting device; 17-a removable baffle; 18-panoramic photography; 19-a lamp strip; 20-test piece table control buttons; 21-panoramic camera control buttons; 100-upper round piece; 200-middle round piece; 300-lower round piece.
Detailed Description
Referring to fig. 1 to 8, an embodiment of the present invention provides a method for detecting saturation, which is applied to a device for detecting saturation of the present invention, the device for detecting saturation of the present invention includes: transparent coloring box 13, high-pressure spraying device, panorama camera 18.
Specifically, two rotary lifting devices 16 are arranged in the transparent coloring box 13, a test piece table 15 is arranged on the rotary lifting devices 16, a test piece table control button 20 and a panoramic camera control button 21 are arranged outside the transparent coloring box 13, and the test piece table control button 20 is used for controlling the rotary lifting devices 16 to move so as to realize rotation, lifting and horizontal movement of the test piece table 15; the two test piece tables 15 are respectively used for placing a test piece 14 and a panoramic camera 18, and a detachable baffle 17 is arranged between the two rotary lifting devices 16; the panoramic camera control button 21 is used to control the panoramic camera 18 to acquire an image of the test piece 14.
Specifically, the high-pressure spraying device includes: a reagent bottle 1, a transfusion tube 2, a compressed air inlet 3, a pressure regulating valve 4, a high-pressure pump 5, an accumulator 6, a filter 7, a stop valve 8, a high-pressure hose 10, a side spray head 11 and an upper spray head 12; the reagent bottle 1 is connected with a high-pressure pump 5 through a transfusion pipe 2, the high-pressure pump 5 is provided with a compressed air inlet 3, and the compressed air inlet 3 is provided with a pressure regulating valve 4; the high-pressure pump 5 is connected with an accumulator 6, the accumulator 6 is connected with a filter 7, the filter 7 is connected with a stop valve 8, the stop valve 8 is respectively connected with a side spray head 11 and an upper spray head 12 through a high-pressure hose 10, and the side spray head 11 and the upper spray head 12 are respectively arranged on a transparent coloring box 13 and are positioned on the side part and above a test piece table 15 for placing a test piece 14; a lamp strip 19 is arranged above the transparent coloring box 13;
the method for detecting the filling saturation comprises the following steps:
step one: placing a core extractor on the semi-flexible pavement to be detected, and drilling a core sample on the semi-flexible pavement by using the core extractor to obtain a cylindrical test piece; and (3) integrally demolding the test piece, and cutting along the cross section of the test piece by adopting a cutting machine to obtain an upper round piece, a middle round piece and a lower round piece.
Step two: and smearing the propylene filler to the gap of the surface to be tested of the test piece by adopting a fine brush.
Step three: preparing 1% phenolphthalein alcohol reagent as colorant, and pouring into a reagent bottle for standby.
Step four: and sequentially placing the upper round piece, the middle round piece and the lower round piece on a test piece table, respectively coloring the two tangent plane wafers of the middle round piece and the three cylindrical surfaces of the upper round piece, the middle round piece and the lower round piece by using the side spray head and the upper spray head through spraying coloring agents, and observing the color change of the test piece after the spraying is finished.
Step five: after the concrete slurry in the sprayed test piece turns into pink, scanning the tested piece by using a panoramic camera to obtain a two-dimensional picture, guiding the picture into an image processing system, counting picture coloring and residual communicated void areas by using the image processing system, calculating and counting the color situation, displaying the measurement result data on an image processing interface after calculation and processing, and taking the calculated saturation as an index for evaluating grouting effect.
The method for detecting saturation according to the present invention will be described in detail below.
Before detection, all equipment is firstly debugged, after on-site coring and demoulding, the core sample specimen 14 is cut, the cutting method is not unique, the cutting method can be adjusted according to actual requirements, the specimens are trisected, and the cutting method is as shown in figures 1-2. And after the ash removal is finished, filling the gap of the surface to be measured with the prepared filling material, and putting the test piece on the test piece table 15 in the transparent coloring box 13 after scraping and polishing to ensure that the test piece is stably placed. Next, a removable baffle 17 is placed between the test piece 14 and the panoramic camera 18 to prevent the agent from being sprayed to other places, causing contamination to the camera lens, and adversely affecting the subsequent image acquisition step. The top and the side of the box body are respectively provided with an upper spray head 12 and a side spray head 11. The specimen rotating and lifting device 16 can be controlled through the out-box specimen stage control button 20, so that the height of the specimen stage 15 is adjusted, and the follow-up coloring is complete, as shown in fig. 3.
Referring to fig. 6, a high pressure spray apparatus is shown, which is supported and stabilized as a whole by a bracket 9, and is connected to a side spray head 11 and an upper spray head 12 on the right side by a high pressure hose 10. When the coloring is carried out, 1% phenolphthalein alcohol solution prepared in advance is poured into a reagent bottle 1, a perfusion tube 2 is arranged above the reagent bottle 1, the air enters the high-pressure pump 5 through a compressed air inlet 3 above, the atomization effect is achieved while high-pressure power is provided for the reagent, a pressure regulating valve 4 is arranged above the high-pressure pump, the pressure can be regulated, an accumulator 6 is used as an auxiliary power source, and a damping function and pressure retention can be provided for the high-pressure pump 5 in working. After the reagent is filtered by the filter 7, the reagent enters the high-pressure hose 10 from the infusion tube 2 and is sprayed from the side spray head 11 and the upper spray head 12, wherein the stop valve 8 can be used for controlling the switch and adjusting the flow.
When the coloring is started, the upper round piece 100, the middle round piece 200 and the lower round piece 300 are sequentially placed on the test piece table 15, the two tangent plane circular sheets of the middle round piece and the three cylindrical surfaces of the upper round piece, the middle round piece and the lower round piece are respectively colored, and the color change of the concrete test piece is observed after the spraying is finished.
Referring to fig. 7, after the coloring is finished, the detachable baffle 17 is removed, and the coloring condition of the test piece is scanned and collected by the panoramic camera, as shown in fig. 7, when the cylindrical surface image is collected, the height of the test piece table 15 is adjusted according to the actual condition, so that the image collection is complete, then under the action of the rotary lifting device 16, the test piece is enabled to perform horizontal movement and rotary movement simultaneously, and the panoramic camera is enabled to perform horizontal movement matched with the moving speed of the test piece, so that the purposes of collecting the cylindrical surface image and enabling the cylindrical surface image to be planarized are achieved.
The acquired Image is imported into an Image processing system, and the Image processing system adopts Image J, wherein the resolution of the Image is 1024 multiplied by 513. Necessary basic parameters are set on a software interface, and picture threshold values are adjusted through functions of the software, so that the colored cement paste area is ensured to be marked, and the colored cement paste area is red after being selected. The void area filled by the dyeing filler comprises a communicated void and a closed void, the closed void is removed through manual identification, the rest communicated void in direct contact with the slurry is marked, and the selected void area is black. At this time, the area of the pixel point of the calibrated area can be automatically calculated by measurement software: let the color paste area be S1, the void area after grouting be S2, the saturation be D, pass d=And (3) obtaining a grouting saturation index by 100%, wherein the calculation result can be directly displayed on an image processing interface, and the saturation is used for evaluating the grouting effect of the poured asphalt concrete.
Because the areas of the cylindrical surface and the tangent plane circle picture collected after coloring are different, the weight is set for calibration according to the following method:
the area of the tangent circle 1 is S3, the area of the coloring slurry is S4, the area of the gap is S5, and the saturation is D3; the area of the tangent circle 2 is S6, the area of the coloring slurry is S7, the area of the gap is S8, and the saturation is D4; the cylindrical surface of the upper circular piece is unfolded to be S9, the slurry coloring area is S10, the gap area is S11, and the saturation is D5; the cylindrical surface unfolding area of the middle circular piece is S12, the slurry coloring area is S13, the void area is S14, and the saturation is D6; the cylindrical surface of the lower round piece is unfolded to be S15, the coloring area of slurry is S16, the void area is S17 and the saturation is D7.
After actual calculation, each data value is as follows:
S3=140530.5331(px)；
S4=68595.4288(px)；
S5=10992.4376(px)；
note that: 1 px= 0.05487mm;
D3=68595.4288/(10992.4376+68595.4288)×100%=86.1883%；
S6=148862.4398(px)；
S7=63207.5958(px)；
S8=9079.2419(px)；
note that: 1 px= 0.05216mm;
D4=63207.5958/(9079.2419+63297.5958)×100%=87.3312%；
S9=3108892.3499(px)；
S10=1099887.9247(px)；
S11=102012.2094(px)；
note that: 1 px= 0.03921mm;
D5=1099887.9247/(102012.2094+1099887.9247)×100%=91.5124%；
S12=3120152.6580(px)；
S13=998921.3442(px)；
S14=72133.5491(px)；
note that: 1 px= 0.03175mm;
D6=998921.3442/(72133.5491+998921.3442)×100%=93.2652%；
S15=3830012.7754(px)；
S16=1000342.8798(px)；
S17=60867.6321(px)；
note that: 1 px= 0.02812mm;
D7=1000342.8798/(60867.6321+1000342.8798)×100%=94.2643%；
the saturation D of the whole test piece is determined by an area weighting method, wherein the area weighting is as follows:
a=S3/(S3+S6+S9+S12+S15)=140530.5331/(140530.5331+148862.4398+3108892.3499+3120152.6580+3830012.7754)=0.01361；
b=S6/(S3+S6+S9+S12+S15)=148862.4398/(140530.5331+148862.4398+3108892.3499+3120152.6580+3830012.7754)=0.01439；
c=S9/(S3+S6+S9+S12+S15)=3108892.3499/(140530.5331+148862.4398+3108892.3499+3120152.6580+3830012.7754)=0.3004；
d=S12/(S3+S6+S9+S12+S15)=3120152.6580/(140530.5331+148862.4398+3108892.3499+3120152.6580+3830012.7754)=0.3015；
e=S15/(S3+S6+S9+S12+S15)=3830012.7754/(140530.5331+148862.4398+3108892.3499+3120152.6580+3830012.7754)=0.3701；
saturation d=d3×a+d4×b+d5×c+d6×d+d7×e= 86.1883% ×0.01361+87.3312% ×0.01439+91.5124% ×0.3004+93.2652% ×0.3015+94.2643% × 0.3701 = 92.9267%; and the grouting saturation D of the whole test piece is 92.9267% after calculation.
The method of the invention uses the two-dimensional section to represent the three-dimensional elevation, which is close to the assumption in physical sense, but has certain error, so the data calibration is carried out, and the correlation between the actual measurement of the statistical building test and the detection method is carried out. In the indoor test, core sample test pieces are drilled on the road surface distribution before and after grouting, and the volumes of the molded 5 core sample test pieces are respectively measuredVolume of mixture and closed void->Mass of test pieces in water ∈>Mass of test piece in air ∈>The method comprises the steps of carrying out a first treatment on the surface of the Connectivity void fraction->X 100%, wherein>，/>For the density of water, 1.0g/cm of the water is generally taken at normal temperature; grouting material filling rate->X 100%, wherein>For communicating void ratio before grouting, the method is characterized in that>The porosity is communicated after grouting.
The actual measurement perfusion rates of the 5 core sample test pieces obtained after calculation are as follows: 87.3221%, 88.5927%, 95.0805%, 93.8993%, 96.2832%. The grouting saturation degrees obtained by cutting, filling, coloring and data acquisition and calculation of the 5 grouted core sample test pieces according to the detection method of the invention are as follows: 85.3321%, 87.6434%, 90.4513%, 92.9267%, 94.2883%.
After linear fitting, a relation between the two is established, a linear function is adopted for fitting, and a regression curve image is shown in fig. 8. The function expression after regression fit is: y=1.000547x+0.019433; wherein x is a measured value of the method, y is a true value, and the correction relation between the calculated value and the true value of the method can be determined after calibration, so that more accurate grouting saturation is obtained and used as an index for evaluating grouting effect.
From the above embodiments, the present invention provides a method for detecting saturation of grouting in semi-flexible asphalt concrete, which is generally divided into steps of on-site coring, cutting, filling, coloring, image acquisition, data processing, calibration, etc. The method comprises the steps of cutting a coring test piece into equal-size parts along a cross section, dividing the test piece into trisections by the technical scheme, filling gaps of a surface to be measured by adopting propylene pigment, uniformly coloring two section wafers and three circumferential surfaces by applying the principle that alkaline substances in a phenolphthalein cement slurry can change color, collecting color images by a panoramic image camera, extracting and analyzing coloring conditions and filling gaps of the images by using image processing software, screening out residual communication gaps in direct contact with the cement slurry, calculating grouting saturation, and more intuitively reflecting grouting effect after analysis and calculation.
The embodiments of the present invention described above do not limit the scope of the present invention.
Claims (7)
1. A method for detecting saturation of a filling type, the method being applied to a saturation detection apparatus of a filling type, the saturation detection apparatus comprising: a transparent coloring box (13), a high-pressure spraying device and a panoramic camera (18);
two rotary lifting devices (16) are arranged in the transparent coloring box (13), a test piece table (15) is arranged on the rotary lifting devices (16), a test piece table control button (20) and a panoramic camera control button (21) are arranged outside the transparent coloring box (13), and the test piece table control button (20) is used for controlling the rotary lifting devices (16) to move so as to realize rotation, lifting and horizontal movement of the test piece table (15); the two test piece tables (15) are respectively used for placing a test piece (14) and a panoramic camera (18), and a detachable baffle (17) is arranged between the two rotary lifting devices (16); the panoramic camera control button (21) is used for controlling the panoramic camera (18) to collect images of a test piece (14);
the high pressure spray apparatus includes: a reagent bottle (1), a transfusion tube (2), a compressed air inlet (3), a pressure regulating valve (4), a high-pressure pump (5), an accumulator (6), a filter (7), a stop valve (8), a high-pressure hose (10), a side spray head (11) and an upper spray head (12); the reagent bottle (1) is connected with the high-pressure pump (5) through the infusion tube (2), the high-pressure pump (5) is provided with a compressed air inlet (3), and the compressed air inlet (3) is provided with a pressure regulating valve (4); the high-pressure pump (5) is connected with an accumulator (6), the accumulator (6) is connected with a filter (7), the filter (7) is connected with a stop valve (8), the stop valve (8) is respectively connected with a side spray head (11) and an upper spray head (12) through a high-pressure hose (10), and the side spray head (11) and the upper spray head (12) are respectively arranged on the transparent coloring box (13) and are positioned on the side part and the upper part of a test piece table (15) for placing a test piece (14); a lamp strip (19) is arranged above the transparent coloring box (13);
the method comprises the following steps:
step one: placing a core extractor on the semi-flexible pavement to be detected, and drilling a core sample on the semi-flexible pavement by using the core extractor to obtain a cylindrical test piece; demolding the whole test piece, and cutting along the cross section of the test piece by adopting a cutting machine to obtain an upper round piece, a middle round piece and a lower round piece;
step two: coating the propylene filler to the gap of the surface to be tested of the test piece by adopting a fine brush;
step three: preparing 1% phenolphthalein alcohol reagent as a colorant, and pouring the colorant into a reagent bottle for standby;
step four: sequentially placing the upper round piece, the middle round piece and the lower round piece on a test piece table, respectively coloring the two tangent plane wafers of the middle round piece and the three cylindrical surfaces of the upper round piece, the middle round piece and the lower round piece by using the side spray heads and the upper spray heads through spraying coloring agents, and observing the color change of the test piece after the spraying is finished;
step five: after the concrete slurry in the sprayed test piece turns into pink, scanning the tested piece by using a panoramic camera to obtain a two-dimensional picture, guiding the picture into an image processing system, counting picture coloring and residual communicated void areas by using the image processing system, calculating and counting the color situation, displaying the measurement result data on an image processing interface after calculation and processing, and taking the calculated saturation as an index for evaluating grouting effect;
the method further comprises the steps of: in the indoor test, core sample test pieces are drilled on the road surface distribution before and after grouting, and the volumes of the molded 5 core sample test pieces are respectively measuredMixing and sealingVoid volume->Mass of test piece in waterMass of test piece in air ∈>The method comprises the steps of carrying out a first treatment on the surface of the Connectivity void fraction->X 100%, wherein>，/>For the density of water, 1.0g/cm of the water is generally taken at normal temperature; grouting material filling rate->X 100%, wherein>For communicating void ratio before grouting, the method is characterized in that>The void ratio is communicated after grouting; obtaining the actual measurement pouring rate of 5 core sample test pieces after calculation, and respectively obtaining 5 grouting saturation levels of the 5 grouted core sample test pieces after final calculation according to the steps one to five; after linear fitting, establishing a relation between the two, fitting by adopting a primary function, and after regression fitting, obtaining a function expression: y=1.000547x+0.019433; wherein x is a calculated value obtained according to the methods from the first step to the fifth step, and y is a true value; after calibration, the correction relation between the calculated value and the true value can be determined, so that more accurate grouting saturation is obtained and used as an index for evaluating grouting effect.
2. The method of claim 1, wherein in the first step, the core sample surface is re-drilled if there is a significant defect.
3. The method of claim 1, wherein the first step further comprises: and (3) carrying out ash removal on the cut test piece, and cleaning surface impurities.
4. The method of claim 1, wherein the second step further comprises: and (3) wiping off the excessive pigment by using mineral alcohol or turpentine, and polishing off residual filling materials by using sand paper after the acrylic pigment filling materials are solidified and molded.
5. The method for detecting saturation according to claim 1, wherein in the fifth step, during cylindrical surface image acquisition, the height of the specimen stage is adjusted according to actual conditions to ensure the integrity of image acquisition, then the specimen is subjected to horizontal movement and rotational movement simultaneously under the action of the rotational lifting device, and the panoramic camera performs horizontal movement matched with the movement speed of the specimen to acquire a two-dimensional picture.
6. The method of claim 1, wherein in the fifth step, the Image processing system uses Image J with an Image resolution of 1024×513, and the area of the pixel point of the calibrated area is automatically calculated by measurement software: let the color paste area be S1, the void area after grouting be S2, the saturation be D, pass d=And (5) obtaining a grouting saturation index by using the X100%.
7. The method of claim 6, further comprising: the weight is set for calibration according to the following method:
the area of the tangent circle 1 is S3, the area of the coloring slurry is S4, the area of the gap is S5, and the saturation is D3;
the area of the tangent circle 2 is S6, the area of the coloring slurry is S7, the area of the gap is S8, and the saturation is D4;
the cylindrical surface of the upper circular piece is unfolded to be S9, the slurry coloring area is S10, the gap area is S11, and the saturation is D5;
the cylindrical surface unfolding area of the middle circular piece is S12, the slurry coloring area is S13, the void area is S14, and the saturation is D6;
the cylindrical surface unfolding area of the lower circular piece is S15, the slurry coloring area is S16, the void area is S17 and the saturation is D7;
the saturation D of the whole test piece is determined by an area weighting method, wherein the area weighting is as follows: a=s3/(s3+s6+s9+s12+s15); b=s6/(s3+s6+s9+s12+s15); c=s9/(s3+s6+s9+s12+s15); d=s12/(s3+s6+s9+s12+s15); e=s15/(s3+s6+s9+s12+s15); the overall specimen grouting saturation d=d3×a+d4×b+d5×c+d6×d+d7×e was calculated.
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