CN114606840B - Concrete panel resonance rubblized structure layer construction method suitable for high and cold regions - Google Patents
Concrete panel resonance rubblized structure layer construction method suitable for high and cold regions Download PDFInfo
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Abstract
The invention discloses a concrete panel resonance rubble structure layer construction method suitable for a high and cold area, which comprises the following steps: step 1: carrying out unmanned aerial vehicle camera shooting on the construction road section, and classifying the construction road section based on the unmanned aerial vehicle camera shooting; step 2: based on the classification of the construction road sections, the constructor carries out pretreatment on the construction road sections; and step 3: selecting a representative road section to perform a resonance rubblization test, and determining a standard value of a resonance rubblization construction parameter; and 4, step 4: determining an initial value of a resonance rubblization construction parameter based on the classification of the construction road section, and carrying out resonance rubblization construction on the construction road section; and 5: and cleaning the broken layer after the resonance rubblization construction, rolling the broken layer, and performing construction checking. The unmanned aerial vehicle camera shooting method is suitable for high and cold areas, intelligent pre-judging classification is carried out on unmanned aerial vehicle camera shooting, construction is carried out based on the intelligent pre-judging classification processing mode, trial and error cost is reduced, and working efficiency is improved.
Description
Technical Field
The invention belongs to the field of road construction, and particularly relates to a concrete panel resonance rubble structure layer construction method suitable for high and cold regions.
Background
The resonance rubblization is a technology for crushing old cement concrete pavement, and is characterized in that the old cement concrete pavement and a crushing machine generate resonance phenomenon through a resonance principle, so that the old cement concrete pavement is crushed into a cement concrete rubble particle layer with an upper layer embedded and extruded and a lower layer embedded and locked with each other. The crushed broken stones are adjacent and complementary in shape and small in particle size, a stable structure which is mutually embedded and extruded is formed, horizontal and vertical displacement of the original cement concrete pavement slab at cracks and joints is solved, stress of upward reflection of the original slab cracks is eliminated, the strength and rigidity of the layer are higher than those of graded broken stones, meanwhile, the influence on an old pavement foundation is small, and the method is an effective means for solving the problem that reflection cracks are easy to occur when the cement concrete pavement is additionally paved. And the extreme climate of high and cold regions also puts higher requirements on the construction efficiency.
Disclosure of Invention
The invention aims to solve the technical problem of providing a concrete panel resonance rubble structure layer construction method suitable for alpine regions, which is suitable for alpine regions, improves the working efficiency by intelligently pre-judging and classifying the camera shooting of an unmanned aerial vehicle and further leading field experimenters to carry out investigation and prepare test materials based on the pre-judged result, and is strong in operability and capable of reducing the trial and error cost in the construction process by carrying out construction based on the processing mode of intelligent pre-judging and classifying.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a concrete panel resonance rubblized structure layer construction method suitable for high and cold regions comprises the following steps:
step 1: carrying out unmanned aerial vehicle camera shooting on the construction road section, classifying the construction road section based on the unmanned aerial vehicle camera shooting, and marking the construction road section as a problem road section, a frequency marking road section, a low-frequency road section and a high-frequency road section;
step 2: based on the classification of the construction road sections, the constructor carries out pretreatment on the construction road sections;
and step 3: selecting a representative road section on the standard frequency road section to perform a resonance rubblization test, and determining a standard value of a resonance rubblization construction parameter;
and 4, step 4: determining an initial value of a resonance rubblization construction parameter based on the classification of the construction road section, and carrying out resonance rubblization construction on the construction road section;
and 5: and cleaning the broken layer after the resonance rubblization construction, rolling the broken layer, and performing construction checking.
Further, step 1 comprises the following steps:
step 1.1: the unmanned aerial vehicle flies above the construction road section at a constant speed v above the construction road section and shoots videos, so that vehicles are not in the shooting range of the unmanned aerial vehicle, and the height of the unmanned aerial vehicle is adjusted to ensure that the videos shoot both sides of the road;
step 1.2: converting the video shot by the unmanned aerial vehicle into a plurality of frame image sets G (i),
G(i)=(P(i),T(i))（1≤i≤n）
wherein G (i) represents the ith frame image set, n is the total frame number of the video converted into the image set, P (i) is the ith frame image, and T (i) is the time of the ith frame image in the video;
step 1.3: dividing an image set G (i) into a plurality of continuous image blocks Q (1) -Q (m);
step 1.4: respectively calculating the average gray value and the gray value variance of pixels in each image block, and recording the average gray value of the pixels in the jth image block as E (Q (j)), and recording the gray value variance of the pixels in the jth image block as D (Q (j));
step 1.5: when D (Q (j)) is equal to or more than the block pixel variance threshold D1, marking as a problem road section; when D (q (j)) < intra-tile pixel variance threshold D1,
(1- &) E1 < E (Q (j)) < (1+ &) E1, the segment is marked as a frequency labeled segment, where, & denotes an error tolerance factor, is a constant, E1 is a tile standard pixel value,
when E (Q (j)) is more than or equal to (1+ &) E1, marking the road section as a high-frequency road section,
(iii) when E (Q) (j) is less than or equal to (1- &) E1, marking the section as a low frequency section.
Further, the partition method of the block in step 1.3 includes the following steps:
step 1.31: setting an image frame number k corresponding to the minimum construction range;
step 1.32: forming blocks Q (1) -Q (m) in sequence as a block per k frame image set, wherein m satisfies the following formula:
m=int(n/k)
wherein int (n/k) represents the integer dividing n by k;
step 1.33: when n cannot be divided by k, the images of the remaining frames are put into q (m).
Preferably, the pretreatment mode in step 2 is as follows:
when the construction road section is classified as a problem road section, the road section is inspected and confirmed on the spot whether an asphalt adding layer and an asphalt surface repairing material exist on an old concrete slab of the road section, and if so, the asphalt adding layer and the asphalt surface repairing material are removed;
when the construction road section is classified into a low-frequency road section, on-site investigation is carried out to determine whether a road section which is not suitable for rubblization exists, and if so, excavation and re-filling treatment is carried out;
in addition, the drainage system is repaired or added, and vibration isolation ditches are arranged on the outer side edge of the road shoulder or the outer side of the road bed of the building group section.
Further, the resonant rubblization construction parameters in step 3 include vibration frequency, amplitude, transverse hammer spacing, hammer head width and construction advancing speed.
Further, step 4 comprises the following steps:
step 4.1: for the standard frequency road section, adopting a standard value of the resonance rubblization construction parameter as a construction initial value of the road section;
step 4.2: for a high-frequency road section, standard values are adopted as construction initial values of the road section in the construction parameters of the road section, such as amplitude, transverse hammer distance, hammer head width and construction advancing speed, and the construction initial values of vibration frequency are as follows:
f0=fs×E(Q(g))/e1×c0
wherein f0 represents the construction initial value of the vibration frequency at the high frequency link, fs represents the standard value of the vibration frequency, E (Q (g)) represents the average gray scale value of the pixels in the unmanned aerial vehicle image pickup block corresponding to the high frequency link, c0 is a high frequency conversion factor and is a constant,
step 4.3: for the road section which is not preprocessed in the low-frequency road section, standard values of amplitude, transverse hammer distance and hammer head width in the road section construction parameters are used as construction initial values of the road section, and the construction initial values of vibration frequency and construction advancing speed are respectively as follows:
f1=fs×E(Q(d))/e1×c1
v1=v0×E(Q(d))/(e1) ^1/3
wherein f1 represents the construction initial value of the vibration frequency at the low frequency link, E (Q (d)) represents the average gray scale value of the pixels in the unmanned aerial vehicle image pickup block corresponding to the low frequency link, c1 is a low frequency conversion factor and is a constant,
v1 represents the construction traveling speed at the low frequency section, v0 represents the standard value of the construction traveling speed, () ^1/3
Represents the power of one third of the total,
step 4.4: for the low-frequency road section and the problem road section after pretreatment, adopting a standard value of a resonance rubblization construction parameter as a construction initial value of the road section;
step 4.5: and in the resonant rubblization construction process of each road section, fine-tuning construction parameters according to actual construction conditions.
Furthermore, when the rubble stone is constructed in a resonant mode, the road surface is sprinkled with water to reduce the influence of raised dust, and the sprinkling direction is vertical and upward.
Preferably, the cleaning of the crushed layer in the step 5 comprises the following steps:
step 5.1A: manually removing strip-shaped fillers among original cement concrete joints on the crushing layer;
step 5.2A: if the surface of the crushed layer has steel bar leakage, removing the whole steel bar or cutting off the steel bar leakage part to be flush with the top surface of the crushed layer;
step 5.3A: if the surface of the rubble layer has projected fragments with the size larger than 5cm, the rubble layer is removed and graded rubbles are adopted for backfilling.
Further, in the step 5, crushing layer rolling is divided into three stages of initial pressing, secondary pressing and final pressing, steel wheels and rubber wheels are combined for rolling, the rolling is carried out in sequence from edge to middle from low to high, and 1/2 wheel widths are overlapped during rolling.
Further, the crushing layer rolling in the step 5 comprises the following specific steps:
step 5.1B: when the crushing layer is primarily rolled, the steel wheel is vibrated and rolled for 2 times at the speed of 1.5-1.7km/h, and water is sprayed by a watering cart to wet the surface of the rubblized substance;
step 5.2B: inspecting the preliminarily rolled surface, spreading stone chip caulking materials for caulking and filling gaps in areas with particle gaps exceeding a threshold value, and performing secondary crushing treatment on the areas larger than 10 cm;
step 5.3B: when the crushing layer is rolled and re-pressed, the steel wheel is used for vibrating and compacting for 3-4 times at the speed of 1.8-2.2km/h, water is sprayed according to weather conditions, and water is not accumulated on the surface of the crushed stone layer after water is sprayed while a certain water content is kept;
step 5.4B, performing rolling finishing on the crushed layer by adopting a rubber-tyred roller to perform static pressure for 2-3 times at the speed of 1.8-2.2km/h, and performing kneading and slurry extracting functions to ensure that the surface of the crushed layer is flat, compact and uniform;
step 5.5B: for the parts which are difficult to roll by the large road roller, a small vibratory roller or a vibratory compaction plate with the self weight of 1t-2t is adopted for supplementary rolling;
step 5.6B: in order to strengthen the rolling effect, a layer of stone chip caulking materials is uniformly distributed on the surface of the rubble, and the water spraying rolling is matched, so that the rolling times are increased as much as possible within the permission of construction conditions;
step 5.7B: after rolling, sealing construction is carried out as soon as possible, and dust and rainwater are prevented from permeating.
Compared with the prior art, the invention has the following beneficial effects:
the invention aims to solve the technical problem of providing a concrete panel resonance rubble structure layer construction method suitable for high and cold regions.
1. According to the invention, artificial intelligence is introduced into the resonant rubble construction process of the concrete panel, and by carrying out intelligent prejudgment on the unmanned aerial vehicle camera shooting, field inspectors can inspect and prepare test materials based on the prejudgment result, so that the working efficiency is improved. However, in the conventional stone resonance construction, the construction road section needs to be inspected in the field in advance before the beginning, and the investigation and test are carried out, so that the condition of incomplete or inaccurate record may occur in the manual inspection process, and the problem that the long-time observation may cause certain visual fatigue to influence the prejudgment result exists.
2. According to the invention, the construction road sections are marked as the problem road section, the frequency marking road section, the low-frequency road section and the high-frequency road section through an intelligent classification algorithm, and a preprocessing suggestion is given based on the classification of the road, so that the trial and error cost in the construction process is reduced, and the construction efficiency is greatly improved.
3. The intelligent classification mode designed by the invention is simple and efficient, has strong operability and is beneficial to popularization and application in the actual construction process.
4. The construction method for the resonant rubble structure layer of the concrete panel has the advantages that resonant rubbles are more uniform, the designed pavement is more sufficiently rolled, the granularity is small, the stability of mutual embedding and squeezing is high, and the construction method is more suitable for special climates of low-temperature frost heaving, precipitation and overhigh ultraviolet radiation in high and cold areas.
5. The invention prejudges the building group through the camera shooting of the unmanned aerial vehicle, and prevents the construction progress from being influenced by the damage of the structure and the building caused by the construction.
6. The invention optimizes the rubble construction process and improves the uniformity of broken rubbles, thereby improving the overall construction efficiency.
7. The invention optimizes the process of cleaning and rolling the broken layer, so that the resonance crushed stone is more uniform, the designed pavement is more fully rolled, the granularity is small, the stability of mutual embedding and squeezing is high, and the invention is more suitable for the special climate of low-temperature frost heaving, precipitation and overhigh ultraviolet radiation in high and cold regions.
8. According to the invention, while the resonance rubblization construction is carried out, the road surface is sprinkled with water to reduce the influence of raised dust, the sprinkling direction is vertically upward to provide the optimal sprinkling speed, the raised dust is sprinkled to a high place while the occurrence of accumulated water on the road surface is reduced, and the influence of the temperature of a high and cold area on water and further on a construction road section is reduced.
Drawings
FIG. 1 shows a concrete panel resonance rubblized structure layer construction method suitable for high and cold regions.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The invention provides a concrete panel resonance rubble structure layer construction method suitable for alpine regions, which is suitable for alpine regions, improves the working efficiency by carrying out intelligent pre-judging classification on the camera shooting of an unmanned aerial vehicle, and further, carrying out on-site expedition and preparation of test materials by on-site expedition personnel based on the pre-judging result, and reduces the trial and error cost in the construction process by carrying out construction based on the processing mode of the intelligent pre-judging classification, and has strong operability.
Example 1
As shown in fig. 1, a concrete panel resonance rubblized structure layer construction method suitable for a high and cold area includes the following steps:
step 1: carrying out unmanned aerial vehicle camera shooting on a construction road section, classifying the construction road section based on the unmanned aerial vehicle camera shooting, and marking the construction road section as a problem road section, a frequency marking road section, a low-frequency road section and a high-frequency road section;
step 2: based on the classification of the construction road sections, the constructor carries out pretreatment on the construction road sections;
and step 3: selecting a representative road section on the standard frequency road section to perform a resonance rubblization test, and determining a standard value of a resonance rubblization construction parameter;
and 4, step 4: determining an initial value of a resonance rubblization construction parameter based on the classification of the construction road section, and carrying out resonance rubblization construction on the construction road section;
and 5: and cleaning the broken layer after the resonance rubblization construction, rolling the broken layer, and performing construction checking.
Further, because the construction road section needs to be inspected in the field in advance before the traditional stone-crushing resonance construction is started, and investigation and test are carried out, the condition that the record is incomplete or inaccurate may occur in the manual inspection process, and the problem that the predetermined result is influenced due to certain visual fatigue caused by long-time observation exists. Therefore, artificial intelligence is introduced into the resonant rubble construction process of the concrete panel, the unmanned aerial vehicle is intelligently pre-judged through shooting, and field inspectors are further emphatically inspect and prepare test materials based on the pre-judged result, so that the working efficiency is improved.
Specifically, the step 1 comprises the following steps:
step 1.1: the unmanned aerial vehicle flies above the construction road section at a constant speed v above the construction road section and shoots videos, so that vehicles are not in the shooting range of the unmanned aerial vehicle, and the height of the unmanned aerial vehicle is adjusted to ensure that the videos shoot both sides of the road;
step 1.2: converting the video shot by the unmanned aerial vehicle into a plurality of frame image sets G (i),
G(i)=(P(i),T(i))（1≤i≤n）
wherein G (i) represents the ith frame image set, n is the total frame number of the video converted into the image set, P (i) is the ith frame image, and T (i) is the time of the ith frame image in the video;
step 1.3: dividing an image set G (i) into a plurality of continuous image blocks Q (1) -Q (m);
step 1.4: respectively calculating the average gray value and the gray value variance of pixels in each image block, and recording the average gray value of the pixels in the jth image block as E (Q (j)), and recording the gray value variance of the pixels in the jth image block as D (Q (j));
step 1.5: when D (Q (j)) is equal to or more than the block pixel variance threshold D1, marking as a problem road section; when D (q (j)) < intra-tile pixel variance threshold D1,
(1- &) E1 < E (Q (j)) < (1+ &) E1, the segment is marked as a frequency labeled segment, where, & denotes an error tolerance factor, is a constant, E1 is a tile standard pixel value,
when E (Q (j)) is more than or equal to (1+ &) E1, marking the road section as a high-frequency road section,
(iii) when E (Q) (j) is less than or equal to (1- &) E1, marking the section as a low frequency section.
The error tolerance factor & here is an empirical value, typically between 18% and 26%, preferably 20%.
The partition method of the block in step 1.3 is many, and only one feasible method is provided here, specifically, the partition method of the block in step 1.3 includes the following steps:
step 1.31: setting an image frame number k corresponding to the minimum construction range;
step 1.32: sequentially forming blocks Q (1) -Q (m) as a block per k frame image set, wherein m satisfies the following equation:
m=int(n/k)
wherein int (n/k) represents rounding n divided by k;
step 1.33: when n cannot be divided exactly by k, the images of the remaining frames are put in q (m).
Here, the selection of the image frame number k corresponding to the minimum construction range is calculated based on the distance S0 corresponding to the conventional minimum processing range in the actual construction process, and if the flight speed of the unmanned aerial vehicle is v, the time interval among the image frame numbers k corresponding to the minimum construction range is S0/v at the minimum.
Further, the resonant rubblization construction parameters in step 3 include vibration frequency, amplitude, transverse hammer spacing, hammer head width and construction advancing speed. The following table shows reference values of construction parameters measured in the construction process in the alpine region.
TABLE 1 empirical ranges of construction parameters
| Vibration frequency (Hz) | Amplitude (mm) | Width of hammer head (mm) | Traveling speed (km/h) |
| 35-50 | 10-20 | 150-250 | <6.5 |
Further, step 4 comprises the following steps:
step 4.1: for the standard frequency road section, adopting a standard value of the resonance rubblization construction parameter as a construction initial value of the road section;
step 4.2: for a high-frequency road section, standard values are adopted as construction initial values of the road section in the construction parameters of the road section, such as amplitude, transverse hammer distance, hammer head width and construction advancing speed, and the construction initial values of vibration frequency are as follows:
f0=fs×E(Q(g))/e1×c0
wherein f0 represents the construction initial value of the vibration frequency at the high-frequency link, fs represents the standard value of the vibration frequency, E (Q) (g) represents the average gray scale value of the pixel in the unmanned aerial vehicle imaging block corresponding to the high-frequency link, c0 is a high-frequency conversion factor and is a constant, the calculation of c0 adopts the construction estimation range of the method, and the c0 is 1.01-1.03.
Step 4.3: for the road section which is not preprocessed in the low-frequency road section, standard values of amplitude, transverse hammer distance and hammer head width in road section construction parameters are used as construction initial values of the road section, and the construction initial values of vibration frequency and construction advancing speed are respectively as follows:
f1=fs×E(Q(d))/e1×c1
v1=v0×E(Q(d))/(e1) ^1/3
wherein f1 represents the construction initial value of the vibration frequency at the low frequency link, E (Q (d)) represents the average gray scale value of pixels in the unmanned aerial vehicle shooting block corresponding to the low frequency link, c1 is a low frequency conversion factor and is a constant, and similarly, the calculation of c1 adopts the construction measurement range of the method, wherein the c1 is 0.95-0.98.
v1 represents the construction running speed at the low frequency section, v0 represents the standard value of the construction running speed, () ^1/3
Representing one third power, the formula is a fitting formula obtained by simulation according to actual construction data.
Step 4.4: for the low-frequency road section and the problem road section after pretreatment, adopting a standard value of a resonance rubblization construction parameter as a construction initial value of the road section;
step 4.5: in the resonant rubblization construction process of each road section, construction parameters are finely adjusted according to the actual construction condition, namely the radius of the rubblization and the uniformity of the rubblization.
It should be noted that the invention provides a set of intelligent algorithm integrating classification, construction parameter suggestion and processing modes aiming at the objective requirement of high construction efficiency in high and cold regions, firstly, the construction road sections are marked as a problem road section, a frequency marking road section, a low frequency road section and a high frequency road section through the intelligent classification algorithm, and the preprocessing suggestion is given based on the classification of roads, and the designed intelligent classification mode is calculated and distinguished based on the image gray value, so that the intelligent algorithm is simple, efficient, strong in operability and beneficial to popularization and application in the actual construction process.
Example 2
The difference between the embodiment 2 and the embodiment 1 is that the building group is judged in advance, and the construction progress is prevented from being influenced by the damage of the construction and the building.
Specifically, the method comprises the following steps:
step A: fast forward the unmanned aerial vehicle to shoot, manually record the time when any shooting of the building group occurs,
and B: extracting an image corresponding to the recording time, and manually marking a building group in the image;
and C: b, stretching the image extracted in the step B to enable two sides of the road to be in a parallel state;
step D: finding out the shortest point from any one side of the road in the building group mark, and making the shortest distance line segment between the point and the adjacent road side;
e, judging the horizontal safe distance of the resonance rubblization construction: when the formula dd/dr × dr0-5 is more than or equal to 0, normal construction can be performed, and different structures are processed by adopting methods of slight vibration, frequency reduction, hammer head improvement and the like, wherein dd represents the shortest distance between a building group and one side of a road in an image, dr represents the distance between two ends of the road in the image, and dr0 represents the distance between actual roads; otherwise, further judgment is needed for construction.
In addition, if structures which cannot be actually drilled (such as inspection well mouths and transverse shallow pipe culverts) exist in the construction process, the structures are avoided in a roundabout and skipping mode. The remaining construction joints are paved with geotextile before the surface course is paved, so that reflection cracks are avoided.
Example 3
Embodiment 3 differs from embodiment 1 in that a specific proposal is given for a way of handling the problem link.
The pretreatment mode in the step 2 is as follows:
when the construction road section is classified as a problem road section, the road section is inspected and confirmed on the spot whether an asphalt adding layer and an asphalt surface repairing material exist on an old concrete slab of the road section, and if so, the asphalt adding layer and the asphalt surface repairing material are removed;
when the construction road section is classified into a low-frequency road section, on-site investigation is carried out to determine whether a road section which is not suitable for rubblization exists, and if so, excavation and re-filling treatment is carried out;
in addition, the drainage system is repaired or added, and vibration isolation ditches are arranged on the outer side edge of the road shoulder or the outer side of the road bed of the building group section. The excavation depth of the vibration isolation trench is not less than 0.5m, and the width of the vibration isolation trench is not less than 0.2 m.
In addition, before rubble construction, a structure needing to be protected along the line needs to be clearly shown on the site, and a safe construction distance is reserved to ensure that the structure cannot be damaged due to rubble construction. In addition, a traffic control and diversion scheme of a construction section is required to be formulated, and the safety requirements of traffic passing and construction traffic are met.
The original cement plate has the conditions of void and plate breakage. And (3) crushing and removing the asphalt patch in the middle of the cement slab by using an air pick, wherein the depth of a pit groove in the middle of the cement slab is more than 10cm, and the pit groove can be backfilled by graded broken stones or filled by C15 lean cement concrete. The graded broken stone backfill area is not subjected to resonance rubblization treatment, and the C15 lean concrete filling section is rubblized together with other sections. The surface fine material is filled, and the surface fine material must have enough stone powder content to ensure the hardening and compacting effects.
The backfill in the ditch is preferably water-permeable crushed stone or gravel aggregate without fine materials, the grading recommended value is shown in table 2, and non-woven reverse filtering fabric is paved between the backfill and the ditch bottom.
TABLE 2 recommended grading of water-permeable granules in a water-collecting channel
Example 4
Example 4 differs from example 1 in that; the rubble stone crushing and breaking construction process is optimized, and the uniformity of broken rubbles is improved, so that the overall construction efficiency is improved.
Specifically, the rubblization construction comprises the following steps:
a) the crushing construction is carried out according to the sequence of the first outer lane, the shoulder and the second inner lane, and the crushing is carried out from the lower part of the road arch to the higher part in sequence during the crushing. The breaking is preferably from the lower part of the concrete pavement to the higher part so as to avoid influencing the drainage after paving the asphalt surface layer.
b) The crushing width of each time of the hammer head is about 0.2m, after the first time of crushing, when the second time of crushing is carried out, the interval of the second time of crushing area is controlled within the width of half of the hammer head, the phenomenon of interlaced crushing is strictly controlled, and the vibration leakage is avoided.
c) When the road slab of a lane is resonantly rubblized, the hammer head is crushed to the edge of the longitudinal seam of the road slab.
d) For structures in a resonant rubblized construction road section and calibrated sensitive buildings along the line, people are required to be sent to observe in real time during construction, the construction is stopped immediately once the cracking phenomenon is found, the report is reported to a supervision unit and an owner, and the construction can be carried out after the reason is analyzed and corresponding protective measures are taken.
e) The resonance broken stone has to use the same equipment to carry out full-width, full-section, all-dimensional and full-depth resonance crushing on the whole cement pavement, and no edges or dead corners are left. The auxiliary crushing can not be carried out by means of non-resonant equipment. The construction joint caused by different construction modes is not formed, and the generation of reflection cracks in the future is avoided.
f) Quality monitoring in the stone crushing process: in order to ensure that the bearing capacity (modulus of resilience) after the crushed stone meets the design requirement (more than 360MPa), and the crushed stone is broken as thoroughly as possible. According to the parameters obtained in the test section, the thickness of the surface crushed stone layer during resonance crushing is preferably 4-7 cm.
Through the rubble stone nature construction step, improve the cracked homogeneity of rubble, improve whole efficiency of construction.
Example 5
Embodiment 5 only lies in optimizing to broken bed clearance and the process of rolling with embodiment 1's difference for the resonance rubble is more even, and the road surface of design rolls more fully, and the granularity is little, inlays each other crowded stability height, adapts to the special climate of high and cold district low temperature frost heave, precipitation and too high ultraviolet radiation more.
Specifically, the cleaning of the crushing layer comprises the following steps:
step 5.1A: manually removing strip-shaped fillers among original cement concrete joints on the crushing layer;
step 5.2A: if the surface of the crushed layer has steel bar leakage, removing the whole steel bar or cutting off the steel bar leakage part to be flush with the top surface of the crushed layer;
step 5.3A: if the surface of the rubble layer has protruding fragments with the size larger than 5cm, removing the protruding fragments and backfilling by using graded rubbles.
Further, in the step 5, crushing layer rolling is divided into three stages of initial pressing, secondary pressing and final pressing, steel wheels and rubber wheels are combined for rolling, the rolling is carried out in sequence from edge to middle from low to high, and 1/2 wheel widths are overlapped during rolling.
In addition, the crushing layer rolling comprises the following specific steps:
step 5.1B: when the crushing layer is primarily rolled, the steel wheel is vibrated and rolled for 2 times at the speed of 1.5-1.7km/h, and water is sprayed by a watering cart to wet the surface of the rubblized material;
step 5.2B: inspecting the preliminarily rolled surface, spreading stone chip caulking materials for caulking and filling gaps in areas with particle gaps exceeding a threshold value, and performing secondary crushing treatment on the areas larger than 10 cm;
step 5.3B: when the crushing layer is rolled and re-pressed, the steel wheel is used for vibrating and compacting for 3 to 4 times at the speed of 1.8 to 2.2km/h, water is sprayed according to weather conditions, and water is not accumulated on the surface of the crushed stone layer after water is sprayed while certain water content is kept;
step 5.4B, performing rolling finishing on the crushed layer by adopting a rubber-tyred roller to perform static pressure for 2-3 times at the speed of 1.8-2.2km/h, and performing kneading and slurry extracting functions to ensure that the surface of the crushed layer is flat, compact and uniform;
step 5.5B: for the parts which are difficult to roll by the large road roller, a small vibratory roller or a vibratory compaction plate with the self weight of 1t-2t is adopted for supplementary rolling;
step 5.6B: in order to enhance the rolling effect, a layer of stone chip caulking materials is uniformly distributed on the surface of the rubble, and the water spraying rolling is matched, so that the rolling times are increased as much as possible within the permission of construction conditions;
step 5.7B: after rolling, sealing construction is carried out as soon as possible, and dust and rainwater are prevented from permeating.
Example 6
Example 6 differs from example 1 in that: when the garrulous petrochemical industry of resonance is under construction, carry out the road surface and spill the influence in order to reduce the raise dust, the watering direction is upwards perpendicularly to provide the optimal watering speed, spray the eminence raise dust when reducing the emergence of surface gathered water, reduce high and cold district's temperature to water, and then to the influence of construction highway section.
The spraying speed of the sprinkling water satisfies the following formula:
-5（v0/10） ^2 +V0×（v0/10）=h
where v0 represents the speed of water spray and h represents the height of the fugitive dust. In addition, the horizontal movement speed of the sprinkler is consistent with the resonance running speed.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. A concrete panel resonance rubble structure layer construction method suitable for high and cold regions is characterized by comprising the following steps:
step 1: carrying out unmanned aerial vehicle camera shooting on the construction road section, classifying the construction road section based on the unmanned aerial vehicle camera shooting, and marking the construction road section as a problem road section, a frequency marking road section, a low-frequency road section and a high-frequency road section;
step 2: based on the classification of the construction road section, the constructor preprocesses the construction road section;
and step 3: selecting a representative road section on the standard frequency road section to perform a resonance rubblization test, and determining a standard value of a resonance rubblization construction parameter;
and 4, step 4: determining an initial value of a resonance rubblization construction parameter based on the classification of the construction road section, and carrying out resonance rubblization construction on the construction road section;
and 5: cleaning a broken layer after the resonant rubblization construction, rolling the broken layer, and performing construction checking;
wherein, step 1 includes the following steps:
step 1.1: the unmanned aerial vehicle flies above the construction road section at a constant speed v above the construction road section and shoots videos, so that vehicles are not in the shooting range of the unmanned aerial vehicle, and the height of the unmanned aerial vehicle is adjusted to ensure that the videos shoot both sides of the road;
step 1.2: converting the video shot by the unmanned aerial vehicle into a plurality of frame image sets G (i),
G(i)=(P(i),T(i))（1≤i≤n）
wherein G (i) represents the ith frame image set, n is the total frame number of the video converted into the image set, P (i) is the ith frame image, and T (i) is the time of the ith frame image in the video;
step 1.3: dividing an image set G (i) into a plurality of continuous image blocks Q (1) -Q (m);
step 1.4: respectively calculating the average gray value and the gray value variance of pixels in each image block, and recording the average gray value of the pixels in the jth image block as E (Q (j)), and recording the gray value variance of the pixels in the jth image block as D (Q (j));
step 1.5: when D (Q (j)) is equal to or more than the block pixel variance threshold D1, marking as a problem road section; when D (q (j)) < intra-tile pixel variance threshold D1,
(1- &) E1 < E (Q (j)) < (1+ &) E1, the segment is marked as a frequency labeled segment, where, & denotes an error tolerance factor, is a constant, E1 is a tile standard pixel value,
when E (Q (j)) is more than or equal to (1+ &) E1, marking the road section as a high-frequency road section,
(iii) when E (Q) (j) is less than or equal to (1- &) E1, marking the road section as a low-frequency road section;
the partition method of the blocks in step 1.3 includes the following steps:
step 1.31: setting an image frame number k corresponding to the minimum construction range;
step 1.32: forming blocks Q (1) -Q (m) in sequence as a block per k frame image set, wherein m satisfies the following formula:
m=int(n/k)
wherein int (n/k) represents rounding n divided by k;
step 1.33: when n cannot be divided by k, putting the images of the remaining frames into Q (m);
step 3, the resonant rubblization construction parameters comprise vibration frequency, amplitude, transverse hammer spacing, hammer head width and construction advancing speed;
the step 4 comprises the following steps:
step 4.1: for the standard frequency road section, adopting a standard value of the resonance rubblization construction parameter as a construction initial value of the road section;
step 4.2: for a high-frequency road section, standard values are adopted as construction initial values of the road section in the construction parameters of the road section, such as amplitude, transverse hammer distance, hammer head width and construction advancing speed, and the construction initial values of vibration frequency are as follows:
f0=fs×E(Q(g))/e1×c0
wherein f0 represents the construction initial value of the vibration frequency at the high frequency link, fs represents the standard value of the vibration frequency, E (Q (g)) represents the average gray scale value of the pixels in the unmanned aerial vehicle image pickup block corresponding to the high frequency link, c0 is a high frequency conversion factor and is a constant,
step 4.3: for the road section which is not preprocessed in the low-frequency road section, standard values of amplitude, transverse hammer distance and hammer head width in the road section construction parameters are used as construction initial values of the road section, and the construction initial values of vibration frequency and construction advancing speed are respectively as follows:
f1=fs×E(Q(d))/e1×c1
v1=v0×E(Q(d))/(e1) ^1/3
wherein f1 represents the construction initial value of the vibration frequency at the low frequency link, E (Q (d)) represents the average gray scale value of the pixels in the unmanned aerial vehicle image pickup block corresponding to the low frequency link, c1 is a low frequency conversion factor and is a constant,
v1 represents the construction traveling speed at the low frequency section, v0 represents the standard value of the construction traveling speed, () ^1/3
Represents the power of one third of the total,
step 4.4: for the low-frequency road section and the problem road section after pretreatment, adopting a standard value of a resonance rubblization construction parameter as a construction initial value of the road section;
step 4.5: and in the resonant rubblization construction process of each road section, fine-tuning construction parameters according to actual construction conditions.
2. The concrete panel resonance rubblized structure layer construction method suitable for the alpine region according to claim 1, wherein the pretreatment mode in the step 2 is as follows:
when the construction section is classified as a problem section, actually inspecting and confirming whether an asphalt adding layer and an asphalt surface repairing material exist on an old concrete plate of the section, and if so, clearing;
when the construction road section is classified into a low-frequency road section, actually inspecting and confirming whether a road section which is not suitable for rubblization exists or not, and if so, performing excavation and re-filling treatment;
in addition, the drainage system is repaired or added, and vibration isolation ditches are arranged on the outer side edge of the road shoulder or the outer side of the road bed of the building group section.
3. The concrete panel resonance rubblized structure layer construction method suitable for the alpine region according to claim 1, characterized in that: when the resonance rubble is under construction, the road surface is sprinkled with the influence that reduces the raise dust, and the sprinkling direction is vertical upwards.
4. The construction method of the concrete panel resonance rubblized structure layer suitable for the alpine region according to claim 1, wherein the step 5 of cleaning the rubblized layer comprises the following steps:
step 5.1A: manually removing strip-shaped fillers among original cement concrete joints on the crushing layer;
step 5.2A: if the surface of the crushed layer has steel bar leakage, removing the whole steel bar or cutting off the steel bar leakage part to be flush with the top surface of the crushed layer;
step 5.3A: if the surface of the rubble layer has protruding fragments with the size larger than 5cm, removing the protruding fragments and backfilling by using graded rubbles.
5. The method for constructing a concrete panel resonance rubblized structure layer suitable for high and cold regions as claimed in claim 1, wherein the crushing layer rolling in step 5 is divided into three stages of initial pressing, secondary pressing and final pressing, steel wheels and rubber wheels are combined for rolling, the rolling is performed in a sequence from side to middle with low to high, and 1/2 wheel widths are overlapped during rolling.
6. The concrete panel resonance rubblized structure layer construction method suitable for the alpine region according to claim 5, wherein the concrete steps of crushing the broken layer in the step 5 are as follows:
step 5.1B: when the crushing layer is primarily rolled, the steel wheel is vibrated and rolled for 2 times at the speed of 1.5-1.7km/h, and water is sprayed by a watering cart to wet the surface of the rubblized substance;
step 5.2B: inspecting the preliminarily rolled surface, spreading stone chip caulking materials in areas with particle gaps exceeding a threshold value, caulking and filling gaps, and performing secondary crushing treatment on the areas larger than 10 cm;
step 5.3B: when the crushing layer is rolled and re-pressed, the steel wheel is used for vibrating and compacting for 3 to 4 times at the speed of 1.8 to 2.2km/h, water is sprayed according to weather conditions, and water is not accumulated on the surface of the crushed stone layer after water is sprayed while certain water content is kept;
step 5.4B, performing rolling finishing on the crushed layer by adopting a rubber-tyred roller to perform static pressure for 2-3 times at the speed of 1.8-2.2km/h, and performing kneading and slurry extracting functions to ensure that the surface of the crushed layer is flat, compact and uniform;
step 5.5B: for the parts which are difficult to roll by the large road roller, a small vibratory roller or a vibratory compaction plate with the self weight of 1t-2t is adopted for supplementary rolling;
step 5.6B: in order to enhance the rolling effect, a layer of stone chip caulking materials is uniformly distributed on the surface of the rubble, and the water spraying rolling is matched, so that the rolling times are increased as much as possible within the permission of construction conditions;
step 5.7B: after rolling, sealing construction is carried out as soon as possible, and dust and rainwater are prevented from permeating.
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| WO2015149009A1 (en) * | 2014-03-27 | 2015-10-01 | Georgia Tech Research Corporation | Systems and methods for identifying traffic control devices and testing the retroreflectivity of the same |
| CN106192698A (en) * | 2016-08-30 | 2016-12-07 | 中国十九冶集团有限公司 | Highway pavement rubblization treatment recycling paving construction structure and technology |
| CN111501512A (en) * | 2020-04-30 | 2020-08-07 | 镇江港务集团有限公司 | Multi-stage rubblization construction method for road surface |
| CN112779834A (en) * | 2020-12-31 | 2021-05-11 | 中交第三航务工程局有限公司江苏分公司 | Resonance rubblizing process for old cement concrete pavement |
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