Preventive pavement crack processing method and system based on pre-joint-cutting technology

Abstract

The invention discloses a pavement crack preventive treatment method and system based on a pre-joint-cutting technology. The method comprises the following steps: synchronously preparing and maintaining at least one group of cubic test blocks on a pavement concrete pouring site; periodically collecting the compressive strength value of the test block after a preset first time; if the compressive strength value falls into a preset range, generating joint cutting prompt information; based on the joint cutting prompt information, obtaining roadbed parameters of the current road section, the position of a pavement and pavement concrete thickness information; determining a current joint cutting position and a joint cutting depth according to the roadbed parameters of the current road section, the position of the road surface and the concrete thickness information of the road surface; and performing joint cutting treatment on the current road surface based on the current joint cutting position and the joint cutting depth. The compressive strength of the test block is monitored in real time, and the joint cutting time is accurately judged; and a plurality of factors are comprehensively analyzed, and the optimal joint cutting interval and depth are dynamically calculated, so that the crack control effect is improved, and the service life of a road is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of road engineering and maintenance technology, and more particularly, to a pavement crack preventive treatment method and system based on pre-cut joint technology. BACKGROUND

[0002] Cement concrete pavement will generate shrinkage stress due to temperature and humidity changes during hardening process, and then cause random cracks, which seriously affect the flatness, durability and driving safety of the pavement; the pre-cut joint technology is the most effective active crack control technology at present, and its core is to guide the shrinkage stress to concentrate and release at the induced joint by pre-sawing the joint when the concrete strength develops to a certain extent, so as to form neat and regular cracks.

[0003] However, the traditional pre-cut joint technology has two major pain points: first, the timing of cutting the joint is too dependent on the experience of construction personnel or fixed time schedule, and does not take into account the differences in concrete materials, mix proportion and environmental temperature and humidity, resulting in cutting the joint too early or too late; second, the cutting joint parameters (interval, depth) usually adopt fixed values, and do not fully consider the actual roadbed conditions and the location of the pavement, resulting in that the induced joint does not work effectively in some complex road sections, and still appears broken board or cracks. SUMMARY

[0004] In order to solve the above at least one technical problem, the purpose of the present application is to provide a pavement crack preventive treatment method and system based on pre-cut joint technology, which can accurately determine the optimal cutting window period, and dynamically calculate the optimal cutting interval and depth by comprehensively considering the roadbed parameters and the location information of the pavement, thereby greatly improving the effect of crack control and the service life of the road.

[0005] The first aspect of the present application provides a pavement crack preventive treatment method based on pre-cut joint technology, comprising:

[0006] Synchronously preparing and maintaining at least one group of cubic test blocks at the pavement concrete pouring site;

[0007] Periodically collecting the compressive strength value of the test block based on a preset first time;

[0008] If the compressive strength value falls within a preset range, a cutting joint prompt information is generated;

[0009] Based on the cutting joint prompt information, the roadbed parameters, the location of the pavement and the pavement concrete thickness information of the current road section are obtained;

[0010] According to the roadbed parameters, the location of the pavement and the pavement concrete thickness information of the current road section, the current cutting joint position and the cutting joint depth are determined;

[0011] Based on the current cut location and the cut depth, the current pavement is cut;

[0012] The subgrade parameter of the current section at least includes subgrade moisture content; the position information of the pavement at least includes pavement slope type, and the slope type includes downhill, uphill and flat.

[0013] In the scheme, the step of determining the current cut location specifically includes:

[0014] The subgrade moisture content in the subgrade parameter is extracted, and a correction coefficient of the subgrade moisture content is determined according to the subgrade moisture content;

[0015] According to the position of the pavement, a correction coefficient of the position of the pavement is determined;

[0016] According to the thickness of the pavement concrete, a correction coefficient of the thickness of the pavement concrete is determined;

[0017] The minimum value in the correction coefficient is extracted and set as k; the current cut interval is set as L, and the formula is L=L max *k, wherein L max represents a preset maximum interval of pavement cut;

[0018] Taking the construction starting line or the cut of the current pavement as a reference line, the current cut location is obtained by interval current cut interval.

[0019] In the scheme, the method further includes:

[0020] The current section is divided into a plurality of sub-sections according to the pavement slope type;

[0021] The connecting line between the sub-sections is set as a turning line, and a distance value from the construction starting line or the cut of the current pavement to the corresponding turning line is determined;

[0022] If the distance value from the construction starting line or the cut of the current pavement to the corresponding turning line is less than or equal to the current cut interval, the distance value from the construction starting line or the cut of the current pavement to the corresponding turning line is replaced by the current cut interval;

[0023] If the distance value from the construction starting line or the cut of the current pavement to the corresponding turning line is greater than the current cut interval and less than 2 times the current cut interval, the distance value from the construction starting line or the cut of the current pavement to the corresponding turning line is divided by 2 to obtain a current cut correction interval;

[0024] The current cut correction interval is replaced by the current cut interval to obtain a revised cut interval.

[0025] In the scheme, the step of determining the correction coefficient of the subgrade moisture content according to the subgrade moisture content specifically includes:

[0026] determining whether the subgrade water content is in a preset first water content range, and if so, setting a correction coefficient of the subgrade water content as 1;

[0027] if not, dividing the subgrade water content according to a preset water content range, determining a preset water content range corresponding to the subgrade water content falling into, and determining a corresponding correction coefficient according to the preset water content range corresponding to the subgrade water content falling into.

[0028] In the scheme, the calculation formula of the joint depth is specifically:

[0029] D = D base + ΔD w + ΔD slope , wherein D represents the joint depth, D base represents the foundation joint depth, ΔD w represents a joint depth correction value based on the subgrade water content, and ΔD slope represents a joint depth correction value based on the slope angle.

[0030] In the scheme, the obtaining step of the foundation joint depth specifically comprises:

[0031] obtaining pavement construction data information;

[0032] determining whether the corresponding pavement construction is provided with a dowel bar according to the pavement construction data information;

[0033] when the dowel bar is provided, multiplying the pavement concrete thickness by 1 / 3 to obtain a first joint depth; if the first joint depth is less than 70 millimeters, setting the foundation joint depth D base as 70 millimeters; if the first joint depth is greater than or equal to 70 millimeters, setting the first joint depth as the foundation joint depth D base ;

[0034] when the dowel bar is not provided, multiplying the pavement concrete thickness by 1 / 4 to obtain a second joint depth; if the second joint depth is less than 60 millimeters, setting the foundation joint depth D base as 60 millimeters; if the second joint depth is greater than or equal to 60 millimeters, setting the second joint depth as the foundation joint depth D base .

[0035] In the scheme, the obtaining step of the joint depth correction value of the slope angle specifically comprises:

[0036] when the slope type is flat, setting the joint depth correction value of the slope angle as zero;

[0037] when the slope type is downhill or uphill, extracting a slope value along the pavement extension direction corresponding to the downhill or uphill;

[0038] If the slope value is less than a preset first slope threshold value, a joint depth correction value corresponding to the slope angle is set to zero;

[0039] If the slope value is greater than or equal to the preset first slope threshold value and less than a preset second slope threshold value, a preset first value is set as the joint depth correction value corresponding to the slope angle;

[0040] If the slope value is greater than or equal to the preset second slope threshold value, a preset second value is set as the joint depth correction value corresponding to the slope angle;

[0041] The preset second value is greater than the preset first value, and both the preset second value and the preset first value are greater than zero.

[0042] The second aspect of the present application provides a pavement crack preventive treatment system based on pre-joint technology, comprising a memory and a processor, the memory stores a pavement crack preventive treatment method program based on pre-joint technology, and the pavement crack preventive treatment method program based on pre-joint technology is executed by the processor to realize the following steps:

[0043] Synchronously preparing and maintaining at least one group of cubic test blocks at a pavement concrete pouring site;

[0044] Periodically collecting the compressive strength value of the test block after a preset first time;

[0045] If the compressive strength value falls within a preset range, a joint prompt information is generated;

[0046] Based on the joint prompt information, the roadbed parameters of the current section, the position of the pavement and the thickness information of the pavement concrete are obtained;

[0047] According to the roadbed parameters of the current section, the position of the pavement and the thickness information of the pavement concrete, the current joint position and the joint depth are determined;

[0048] Based on the current joint position and the joint depth, the current pavement is subjected to joint treatment;

[0049] The roadbed parameters of the current section at least include the roadbed water content; the position information of the pavement at least includes the slope type of the pavement, and the slope type includes downhill, uphill and flat.

[0050] In the present scheme, the step of determining the current joint position specifically comprises:

[0051] The roadbed water content in the roadbed parameters is extracted, and the correction coefficient of the roadbed water content is determined according to the roadbed water content;

[0052] According to the position of the pavement, the correction coefficient of the position of the pavement is determined;

[0053] determining a correction coefficient of the thickness of the pavement concrete according to the thickness of the pavement concrete;

[0054] extracting a minimum value in the correction coefficient as k; and setting a current joint spacing as L, which is calculated by L = L max *k, wherein L max represents a preset maximum joint spacing of the pavement;

[0055] taking the construction starting line or the joint of the current pavement as a reference line, and obtaining the current joint position by spacing the current joint spacing.

[0056] In the scheme, the method further comprises:

[0057] dividing the current road section according to the pavement slope type to obtain a plurality of sub-road sections;

[0058] setting a connecting line between the sub-road sections as a turning line, and determining a distance value from the construction starting line or the joint of the current pavement to the corresponding turning line;

[0059] if the distance value from the construction starting line or the joint of the current pavement to the corresponding turning line is less than or equal to the current joint spacing, the distance value from the construction starting line or the joint of the current pavement to the corresponding turning line is replaced by the current joint spacing;

[0060] if the distance value from the construction starting line or the joint of the current pavement to the corresponding turning line is greater than the current joint spacing and less than 2 times the current joint spacing, the distance value from the construction starting line or the joint of the current pavement to the corresponding turning line is divided by 2 to obtain a current joint correction spacing;

[0061] the current joint correction spacing is replaced by the current joint spacing to obtain a revised joint spacing.

[0062] The pavement crack preventive treatment method and system based on the pre-joint technology disclosed by the application can accurately determine the joint time by monitoring the compressive strength of the test block in real time, and dynamically calculate the optimal joint spacing and depth by comprehensively analyzing a plurality of factors, thereby improving the crack control effect and the service life of the road. BRIEF DESCRIPTION OF DRAWINGS

[0063] Figure 1 a flowchart of the pavement crack preventive treatment method based on the pre-joint technology is shown;

[0064] Figure 2 a block diagram of the pavement crack preventive treatment system based on the pre-joint technology is shown. DETAILED DESCRIPTION

[0065] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0066] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0067] Figure 1 A flowchart of a method for preventing pavement cracks based on pre-cut joint technology according to the present invention is shown.

[0068] like Figure 1 As shown, this invention discloses a method for preventive treatment of pavement cracks based on pre-cut joint technology, comprising:

[0069] S101, At least one set of cubic test blocks shall be prepared and cured simultaneously at the road concrete pouring site;

[0070] S102, After a preset first time, the compressive strength value of the test block is periodically collected;

[0071] S103, If the compressive strength value falls within the preset range, a cutting prompt message is generated;

[0072] S104, Based on the joint cutting prompt information, obtain the subgrade parameters, pavement location and pavement concrete thickness information of the current road section;

[0073] S105, Based on the roadbed parameters, pavement location, and pavement concrete thickness information of the current road section, determine the current cut location and cut depth;

[0074] S106, Perform joint cutting treatment on the current road surface based on the current joint location and joint depth.

[0075] According to an embodiment of the present invention, the subgrade parameters of the current road section include at least the subgrade moisture content; the location information of the road surface includes at least the road surface slope type, which includes downhill, uphill, and gentle slope. The cubic test block is a 150mm x 150mm x 150mm cube, and is cured under the same environmental and conditions as the on-site poured concrete pavement. For example, if the preset first time period is 1 day and the cycle is 3 hours, then after 1 day of pouring the cubic test block, the compressive strength value of the corresponding cubic test block is collected every 3 hours. The compressive strength value falls within a preset range of 25%-30% of the corresponding concrete design strength. For example, if the concrete is C40, the corresponding concrete compressive strength value is 40MPa, corresponding to a preset range of 10-12MPa. The gentle slope type of the pavement is a pavement with a slope less than a preset third slope threshold, for example, the preset third slope threshold is 3%. The uphill or downhill type of the pavement is determined according to the direction of construction progress.

[0076] According to an embodiment of the present invention, the step of determining the current cut position specifically includes:

[0077] Extract the subgrade moisture content from the subgrade parameters, and determine the correction coefficient for the subgrade moisture content based on the subgrade moisture content;

[0078] Determine the correction factor for the location of the road surface based on its location;

[0079] Determine the correction factor for the thickness of the road concrete based on the thickness of the road concrete.

[0080] Extract the minimum value from the correction coefficients and set it as k; set the current kerf spacing as L, with the formula L = L max *k, where L max This indicates the preset maximum spacing of road surface cuts;

[0081] Using the current construction start line or cut line of the road surface as the baseline, and at the current cut line spacing, the current cut line position is obtained.

[0082] It should be noted that the lower the moisture content of the subgrade, the drier the current environment, and the faster the concrete shrinkage rate. Therefore, it is necessary to reduce the joint spacing to facilitate heat dissipation and maintenance. The location of the road surface determines the current road slope type. When the road slope is uphill or downhill, the stress on the road surface increases when vehicles travel uphill or downhill, and this stress is not directly transferred to the subgrade, thus causing pressure on the road surface. Therefore, reducing the joint spacing can reduce stress. The thicker the concrete pavement, the less easily it dissipates heat. Therefore, reducing the joint spacing can improve heat dissipation and facilitate maintenance.

[0083] According to an embodiment of the present invention, the step of determining the correction coefficient for the subgrade moisture content based on the subgrade moisture content specifically includes:

[0084] Determine whether the subgrade moisture content is within the preset first moisture content range. If so, set the correction factor for the subgrade moisture content to 1.

[0085] If not, the subgrade moisture content is divided according to the preset moisture content range, the preset moisture content range into which the corresponding subgrade moisture content falls is determined, and the corresponding correction coefficient is determined based on the preset moisture content range into which the subgrade moisture content falls.

[0086] It should be noted that the soil in the current roadbed is extracted and the soil type is determined. Based on the soil type, the optimum moisture content for the current soil to reach the preset compaction state is obtained. For example, if the preset first moisture content range is ±1% of the optimum moisture content, then if the current roadbed moisture content is within ±1% of the optimum moisture content, the correction factor for the current roadbed moisture content is set to 1. If the current roadbed moisture content is less than -1% of the optimum moisture content, then 1% is subtracted from the optimum moisture content, and the difference is subtracted from the previous roadbed moisture content to obtain the first moisture content difference. Then, the first moisture content difference is divided according to the preset moisture content interval, and the interval into which the corresponding first moisture content difference falls is determined. The correction coefficient for the corresponding subgrade moisture content is determined by the interval. For example, if each interval is divided into 1%, then when the first moisture content difference is 2%, the value of the interval into which the first moisture content difference falls is 2. Each moisture content difference interval corresponds to a correction coefficient. The larger the value of the interval into which the first moisture content difference falls, the smaller the correction coefficient for the corresponding subgrade moisture content. When the current subgrade moisture content is within +2% of the optimum moisture content, the correction coefficient for the current subgrade moisture content is set to 1. When the current subgrade moisture content exceeds 2% of the optimum moisture content, a soil over-wetness warning message is generated, and the current subgrade soil is loosened, dried, or neutralized by applying dry concrete according to the soil over-wetness warning message.

[0087] It should be noted that the step of determining the correction coefficient based on the road surface location specifically includes setting the correction coefficient to 1 when the road surface is flat; setting the correction coefficient according to the slope when the road surface is uphill or downhill, wherein the greater the slope, the smaller the corresponding correction coefficient; and setting the correction coefficient for the road surface location to k. slope Its formula is k slope =1―w1*θ, where w1 represents the corresponding conversion coefficient, θ represents the slope, and k slope Greater than zero and less than or equal to 1.

[0088] It should be noted that the step of determining the correction coefficient for the road concrete thickness based on the road concrete thickness specifically includes: when the road concrete thickness is less than or equal to a preset thickness threshold, setting the corresponding correction coefficient to 1, for example, the preset thickness threshold is 200 mm; when the road concrete thickness is greater than the preset thickness threshold, subtracting the preset thickness threshold from the road concrete thickness to obtain a first concrete thickness difference Δh, and setting the correction coefficient for the road concrete thickness to k. h Its formula is k h =1―w2*Δh, where w2 represents the corresponding conversion coefficient.

[0089] According to an embodiment of the present invention, it further includes:

[0090] The current road segment is divided into multiple sub-segments according to the road surface slope type;

[0091] Set the connecting line between sub-segments as the turning line, and determine the distance from the current road surface construction start line or cut to the corresponding turning line.

[0092] If the distance from the current road surface construction starting line or cut to the corresponding turning line is less than or equal to the current cut spacing, then the distance from the current road surface construction starting line or cut to the corresponding turning line will replace the current cut spacing.

[0093] If the distance from the current road surface construction starting line or cut to the corresponding turning line is greater than the current cut spacing but less than twice the current cut spacing, then divide the distance from the current road surface construction starting line or cut to the corresponding turning line by 2 to obtain the current cut correction spacing.

[0094] Replace the current cut spacing with the current cut spacing correction spacing to obtain the revised cut spacing.

[0095] It should be noted that a reserved joint is set at the starting point of construction, and the reserved joint runs through the entire road surface to the roadbed. A cutting line is set at the turning line between sub-sections.

[0096] According to an embodiment of the present invention, the formula for calculating the kerf depth is as follows:

[0097] D = D base +ΔD w +ΔD slope Where D represents the kerf depth, D base Indicates the depth of the base cut, ΔD w ΔD represents the correction value for the cut depth based on the subgrade moisture content. slope This represents the cut depth correction value based on the slope angle.

[0098] It should be noted that when the subgrade moisture content is high, the subgrade support is weak, and the tensile stress at the bottom of the slab increases. Deeper cuts are needed to ensure that the induced joints can release deeper stress and prevent cracks from developing into through cracks. Therefore, when the subgrade moisture content is less than or equal to a preset second moisture content threshold, the corresponding cut depth correction value is set to zero. When the subgrade moisture content is greater than the preset second moisture content threshold, the cut depth correction value is set to a value greater than zero, for example, setting the preset second moisture content threshold to the current optimum moisture content of the subgrade soil + 1%. The cut depth correction value for subgrade moisture content is ΔD. w The value is directly proportional to the subgrade moisture content and the correction value for the cut depth, and its formula is ΔD. w =w3*ΔP; where ΔP represents the difference between the current subgrade moisture content and the preset second moisture content threshold, and w3 represents the conversion coefficient, for example, w3 = 100mm / 100%.

[0099] According to an embodiment of the present invention, the step of obtaining the basic kerf depth specifically includes:

[0100] Obtain road construction data and information;

[0101] Based on the road construction data, determine whether dowel bars are installed in the corresponding road construction.

[0102] When dowel bars are installed, multiply the road concrete thickness by 1 / 3 to obtain the first joint depth; if the first joint depth is less than 70 mm, then the foundation joint depth D is... base Set the first kerf depth to 70 mm; if the first kerf depth is greater than or equal to 70 mm, then set the first kerf depth to the base kerf depth D. base ;

[0103] When no dowel bars are installed, multiply the pavement concrete thickness by 1 / 4 to obtain the second joint depth; if the second joint depth is less than 60 mm, then the foundation joint depth D is... base Set the second kerf depth to 60 mm; if the second kerf depth is greater than or equal to 60 mm, then set the second kerf depth to the base kerf depth D. base .

[0104] According to an embodiment of the present invention, the step of obtaining the cut depth correction value of the slope angle specifically includes:

[0105] When the slope type is gentle, set the cut depth correction value of the slope angle to zero;

[0106] When the slope type is downhill or uphill, extract the slope value of the corresponding downhill or uphill slope along the direction of road extension;

[0107] If the slope value is less than the preset first slope threshold, the cut depth correction value corresponding to the slope angle will be set to zero.

[0108] If the slope value is greater than or equal to a preset first slope threshold and less than a preset second slope threshold, the preset first value is set as the cut depth correction value for the corresponding slope angle.

[0109] If the slope value is greater than or equal to the preset second slope threshold, the preset second value is set as the cut depth correction value for the corresponding slope angle;

[0110] The preset second value is greater than the preset first value, and both the preset second value and the preset first value are greater than zero.

[0111] It should be noted that, for example, the preset first slope threshold is set to 3%, and the preset second slope threshold is set to 5%; for example, the preset first value is 50mm, and the preset second value is 100mm; the preset second slope threshold is greater than the preset first slope threshold, and both the preset second slope threshold and the preset first slope threshold are greater than the preset third slope threshold.

[0112] Furthermore, the kerf depth is extracted. If the kerf depth exceeds a preset kerf depth threshold, multiple cuts are made at that kerf depth. Based on the preset kerf depth threshold, the kerf depth is divided into multiple kerf stages. For example, if the preset kerf depth threshold is 70mm, then when the kerf depth exceeds 70mm, multiple kerf stages are made with 70mm as a boundary. For example, if the current kerf depth is 100mm, then the first kerf depth is 70mm and the second kerf depth is 30mm. If the current kerf depth is 200mm, then the first and second kerf depths are both 70mm and the third kerf depth is 60mm.

[0113] Figure 2 A block diagram of a pavement crack prevention treatment system based on pre-cut joint technology according to the present invention is shown.

[0114] like Figure 2 As shown, a second aspect of the present invention provides a pavement crack prevention treatment system 2 based on pre-cut joint technology, including a memory 21 and a processor 22. The memory stores a pavement crack prevention treatment method program based on pre-cut joint technology. When the processor executes the pavement crack prevention treatment method program based on pre-cut joint technology, it performs the following steps:

[0115] At least one set of cubic test blocks shall be prepared and cured simultaneously at the road concrete pouring site;

[0116] After a preset first time, the compressive strength value of the test block is periodically collected;

[0117] If the compressive strength value falls within the preset range, a cutting prompt message is generated;

[0118] Based on the joint cutting prompt information, obtain the subgrade parameters, pavement location and pavement concrete thickness information of the current road section;

[0119] Based on the current roadbed parameters, pavement location, and pavement concrete thickness information of the current road section, determine the current cut location and cut depth;

[0120] Perform joint cutting treatment on the current road surface based on the current joint location and joint depth;

[0121] The roadbed parameters of the current road section include at least the roadbed moisture content; the location information of the road surface includes at least the road surface slope type, which includes downhill, uphill, and gentle slope.

[0122] In this solution, the step of determining the current cut position specifically includes:

[0123] Extract the subgrade moisture content from the subgrade parameters, and determine the correction coefficient for the subgrade moisture content based on the subgrade moisture content;

[0124] Determine the correction factor for the location of the road surface based on its location;

[0125] Determine the correction factor for the thickness of the road concrete based on the thickness of the road concrete.

[0126] Extract the minimum value from the correction coefficients and set it as k; set the current kerf spacing as L, with the formula L = L max *k, where L max This indicates the preset maximum spacing of road surface cuts;

[0127] Using the current construction start line or cut line of the road surface as the baseline, and at the current cut line spacing, the current cut line position is obtained.

[0128] This plan also includes:

[0129] The current road segment is divided into multiple sub-segments according to the road surface slope type;

[0130] Set the connecting line between sub-segments as the turning line, and determine the distance from the current road surface construction start line or cut to the corresponding turning line.

[0131] If the distance from the current road surface construction starting line or cut to the corresponding turning line is less than or equal to the current cut spacing, then the distance from the current road surface construction starting line or cut to the corresponding turning line will replace the current cut spacing.

[0132] If the distance from the current road surface construction starting line or cut to the corresponding turning line is greater than the current cut spacing but less than twice the current cut spacing, then divide the distance from the current road surface construction starting line or cut to the corresponding turning line by 2 to obtain the current cut correction spacing.

[0133] Replace the current cut spacing with the current cut spacing correction spacing to obtain the revised cut spacing.

[0134] This invention discloses a method and system for preventive treatment of pavement cracks based on pre-cutting technology. By monitoring the compressive strength of test blocks in real time, the timing of cutting is accurately determined. Furthermore, by comprehensively analyzing multiple factors, the optimal cutting interval and depth are dynamically calculated, thereby improving the crack control effect and extending the service life of the road.

[0135] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0136] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0137] In addition, in the various embodiments of the present invention, each functional unit can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0138] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0139] Alternatively, if the integrated units of this invention are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.

Claims

1. A method for preventive treatment of pavement cracks based on pre-cut joint technology, characterized in that, include: At least one set of cubic test blocks shall be prepared and cured simultaneously at the road concrete pouring site; After a preset first time, the compressive strength value of the test block is periodically collected; If the compressive strength value falls within the preset range, a cutting prompt message is generated; Based on the joint cutting prompt information, obtain the subgrade parameters, pavement location and pavement concrete thickness information of the current road section; Based on the roadbed parameters, pavement location, and pavement concrete thickness of the current road section, determine the current cut location and cut depth; Perform joint cutting treatment on the current road surface based on the current joint location and joint depth; The roadbed parameters of the current road section include at least the roadbed moisture content; the location information of the road surface includes at least the road surface slope type, which includes downhill, uphill, and gentle slope.

2. The method for preventive treatment of pavement cracks based on pre-cut joint technology according to claim 1, characterized in that, The step of determining the current cut position specifically includes: Extract the subgrade moisture content from the subgrade parameters, and determine the correction coefficient for the subgrade moisture content based on the subgrade moisture content; Determine the correction factor for the location of the road surface based on its location; Determine the correction factor for the thickness of the road concrete based on the thickness of the road concrete. Extract the minimum value from the correction coefficients and set it as k; set the current kerf spacing as L, with the formula L = L max *k, where L max This indicates the preset maximum spacing of road surface cuts; Using the current construction start line or cut line of the road surface as the baseline, and at the current cut line spacing, the current cut line position is obtained.

3. A method for preventive treatment of pavement cracks based on pre-cut joint technology according to claim 2, characterized in that, Also includes: The current road segment is divided into multiple sub-segments according to the road surface slope type; Set the connecting line between sub-segments as the turning line, and determine the distance from the current road surface construction start line or cut to the corresponding turning line. If the distance from the current road surface construction starting line or cut to the corresponding turning line is less than or equal to the current cut spacing, then the distance from the current road surface construction starting line or cut to the corresponding turning line will replace the current cut spacing. If the distance from the current road surface construction starting line or cut to the corresponding turning line is greater than the current cut spacing but less than twice the current cut spacing, then divide the distance from the current road surface construction starting line or cut to the corresponding turning line by 2 to obtain the current cut correction spacing. Replace the current cut spacing with the current cut spacing correction spacing to obtain the revised cut spacing.

4. A method for preventing pavement cracks based on pre-cut joint technology according to claim 2, characterized in that, The step of determining the correction factor for the subgrade moisture content based on the subgrade moisture content specifically includes: Determine whether the subgrade moisture content is within the preset first moisture content range. If so, set the correction factor for the subgrade moisture content to 1. If not, the subgrade moisture content is divided according to the preset moisture content range, the preset moisture content range into which the corresponding subgrade moisture content falls is determined, and the corresponding correction coefficient is determined based on the preset moisture content range into which the subgrade moisture content falls.

5. A method for preventive treatment of pavement cracks based on pre-cut joint technology according to claim 1, characterized in that, The formula for calculating the kerf depth is as follows: D = D base +ΔD w +ΔD slope Where D represents the kerf depth, D base Indicates the depth of the base cut, ΔD w ΔD represents the correction value for the cut depth based on the subgrade moisture content. slope This represents the cut depth correction value based on the slope angle.

6. A method for preventing pavement cracks based on pre-cut joint technology according to claim 5, characterized in that, The steps for obtaining the basic kerf depth specifically include: Obtain road construction data and information; Based on the road construction data, determine whether dowel bars are installed in the corresponding road construction. When dowel bars are installed, multiply the road concrete thickness by 1 / 3 to obtain the first joint depth; if the first joint depth is less than 70 mm, then the foundation joint depth D is... base Set the first kerf depth to 70 mm; if the first kerf depth is greater than or equal to 70 mm, then set the first kerf depth to the base kerf depth D. base ; When no dowel bars are installed, multiply the pavement concrete thickness by 1 / 4 to obtain the second joint depth; if the second joint depth is less than 60 mm, then the foundation joint depth D is... base Set the second kerf depth to 60 mm; if the second kerf depth is greater than or equal to 60 mm, then set the second kerf depth to the base kerf depth D. base .

7. A method for preventive treatment of pavement cracks based on pre-cut joint technology according to claim 5, characterized in that, The steps for obtaining the cut depth correction value of the slope angle specifically include: When the slope type is gentle, set the cut depth correction value of the slope angle to zero; When the slope type is downhill or uphill, extract the slope value of the corresponding downhill or uphill slope along the direction of road extension; If the slope value is less than the preset first slope threshold, the cut depth correction value corresponding to the slope angle will be set to zero. If the slope value is greater than or equal to the preset first slope threshold and less than the preset second slope threshold, the preset first value is set as the cut depth correction value for the corresponding slope angle. If the slope value is greater than or equal to the preset second slope threshold, the preset second value is set as the cut depth correction value for the corresponding slope angle; The preset second value is greater than the preset first value, and both the preset second value and the preset first value are greater than zero.

8. A pavement crack prevention treatment system based on pre-cut joint technology, characterized in that, The system includes a memory and a processor. The memory stores a program for a pavement crack prevention treatment method based on pre-cut joint technology. When the processor executes the program, the pavement crack prevention treatment method based on pre-cut joint technology performs the following steps: At least one set of cubic test blocks shall be prepared and cured simultaneously at the road concrete pouring site; After a preset first time, the compressive strength value of the test block is periodically collected; If the compressive strength value falls within the preset range, a cutting prompt message is generated; Based on the joint cutting prompt information, obtain the subgrade parameters, pavement location and pavement concrete thickness information of the current road section; Based on the roadbed parameters, pavement location, and pavement concrete thickness of the current road section, determine the current cut location and cut depth; Perform joint cutting treatment on the current road surface based on the current joint location and joint depth; The roadbed parameters of the current road section include at least the roadbed moisture content; the location information of the road surface includes at least the road surface slope type, which includes downhill, uphill, and gentle slope.

9. A pavement crack prevention treatment system based on pre-cut joint technology according to claim 8, characterized in that, The step of determining the current cut position specifically includes: Extract the subgrade moisture content from the subgrade parameters, and determine the correction coefficient for the subgrade moisture content based on the subgrade moisture content; Determine the correction factor for the location of the road surface based on its location; Determine the correction factor for the thickness of the road concrete based on the thickness of the road concrete. Extract the minimum value from the correction coefficients and set it as k; set the current kerf spacing as L, with the formula L = L max *k, where L max This indicates the preset maximum spacing of road surface cuts; Using the current construction start line or cut line of the road surface as the baseline, and at the current cut line spacing, the current cut line position is obtained.

10. A pavement crack prevention treatment system based on pre-cut joint technology according to claim 9, characterized in that, Also includes: The current road segment is divided into multiple sub-segments according to the road surface slope type; Set the connecting line between sub-segments as the turning line, and determine the distance from the current road surface construction start line or cut to the corresponding turning line. If the distance from the current road surface construction starting line or cut to the corresponding turning line is less than or equal to the current cut spacing, then the distance from the current road surface construction starting line or cut to the corresponding turning line will replace the current cut spacing. If the distance from the current road surface construction starting line or cut to the corresponding turning line is greater than the current cut spacing but less than twice the current cut spacing, then divide the distance from the current road surface construction starting line or cut to the corresponding turning line by 2 to obtain the current cut correction spacing. Replace the current cut spacing with the current cut spacing correction spacing to obtain the revised cut spacing.

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