Concrete pavement saw seam time prediction method and device and computer equipment

Abstract

The invention relates to a concrete pavement saw joint time prediction method and device and computer equipment, and the method comprises the steps: determining the compressive strength of a concrete pavement in a preset day and the equivalent age of the concrete pavement at a preset saw joint moment based on concrete related data obtained in advance; determining the concrete strength of the concrete pavement at the preset saw joint moment according to the compressive strength of the preset day and the equivalent age of the concrete pavement at the preset saw joint moment; according to the concrete strength of the concrete pavement at the preset saw joint moment and a saw joint strength range obtained in advance, the predicted saw joint time of the concrete pavement is determined. Based on calculation and analysis of the system, constructors do not need to judge the saw seam time only by experience, uncertainty and inaccuracy caused by personal experience difference and environmental interference are reduced, the construction process is more standardized and normalized, and therefore the overall construction efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pavement concrete construction, and in particular to a method, device and computer equipment for predicting the sawing time of a concrete pavement. Background Art

[0002] Cement concrete is a common building material for airport pavements. Determining the sawing time of pavement concrete is an important part of airport runway construction. If the sawing time is too early, the concrete strength is insufficient, which may cause edge damage, loose stones and other problems; if the sawing time is too late, the concrete slabs will solidify and harden, resulting in irregular shrinkage cracks.

[0003] At present, the sawing time of pavement concrete is mainly judged by construction workers based on experience, and there is a lack of accurate timing methods. Different people have different perceptions of time, which leads to uncertainty and inaccuracy in the control of sawing time. Summary of the invention

[0004] Based on this, it is necessary to provide a method, device and computer equipment for predicting the sawing time of concrete pavement that can solve the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a method for predicting sawing time of a concrete pavement, the method comprising:

[0006] Based on the concrete related data acquired in advance, determine the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time;

[0007] Determine the concrete strength of the concrete pavement at the preset sawing time according to the preset compressive strength at day time and the equivalent age of the concrete pavement at the preset sawing time;

[0008] The predicted sawing time of the concrete pavement is determined according to the concrete strength of the concrete pavement at the preset sawing time and the sawing strength range obtained in advance.

[0009] In one embodiment, the concrete related data includes concrete thickness data, and the process of determining the equivalent age of the concrete pavement at the preset sawing time includes:

[0010] Determine the temperature information of the concrete pavement at the preset sawing time according to the concrete thickness data;

[0011] According to the temperature information of the concrete pavement at the preset sawing time, the equivalent age of the concrete pavement at the preset sawing time is determined.

[0012] In one embodiment, the temperature information includes an average temperature of the concrete layer; determining the temperature information of the concrete pavement at the preset sawing time according to the concrete thickness data includes:

[0013] The concrete pavement is divided according to the concrete thickness data to obtain multiple concrete layers of equal thickness;

[0014] The heat conduction equation is used to calculate the temperature of each concrete layer of equal thickness at the preset sawing time;

[0015] The temperatures of multiple concrete layers of equal thickness at the preset sawing time are averaged to obtain the average temperature of the concrete layer of the concrete pavement at the preset sawing time.

[0016] In one embodiment, the method of determining the equivalent age of the concrete pavement at the preset sawing time according to the temperature information of the concrete pavement at the preset sawing time includes:

[0017] Obtaining model parameters of the equivalent age maturity model; the model parameters include activation energy, ideal gas constant, standard temperature and time interval of the concrete hardening process;

[0018] The model parameters and the average temperature of the concrete layer of the concrete pavement at the preset sawing time are input into the equivalent age maturity model for equivalent calculation processing to obtain the equivalent age of the concrete pavement at the preset sawing time.

[0019] In one embodiment, the method of determining the concrete strength of the concrete pavement at the preset sawing time according to the preset compressive strength at the time and the equivalent age of the concrete pavement at the preset sawing time includes:

[0020] The preset compressive strength at the time of day and the equivalent age are input into the strength calculation equation for calculation and processing to obtain the concrete strength of the concrete pavement at the preset sawing time; the strength calculation equation includes the corresponding relationship between the concrete strength and the equivalent age, the initial age and the preset compressive strength at the time of day.

[0021] In one embodiment, the method of determining the predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at the preset sawing time and the sawing strength range obtained in advance includes:

[0022] If the concrete strength at the preset sawing time is lower than the lower limit of the sawing strength range, the preset sawing time is updated according to the preset time interval, and the concrete strength at the updated preset sawing time is recalculated;

[0023] When the calculated concrete strength is within the sawing strength range, the preset sawing time corresponding to the calculated concrete strength is determined as the predicted sawing time of the concrete pavement.

[0024] In one embodiment, the concrete-related data includes water quality, cement quality and fly ash quality; and the process of determining the preset compressive strength of the concrete pavement includes:

[0025] Determine the water-cement ratio of concrete pavement based on the quality of water, cement and fly ash;

[0026] Substitute the water-cement ratio into the previously obtained corresponding relationship between the water-cement ratio and the concrete strength to obtain the preset compressive strength of the concrete pavement.

[0027] In a second aspect, the present application also provides a concrete pavement sawing time prediction device. The device comprises:

[0028] A strength age determination module, for determining the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time based on the pre-acquired concrete related data;

[0029] A concrete strength determination module, used to determine the concrete strength of the concrete pavement at a preset sawing time according to the preset compressive strength at a preset time and the equivalent age of the concrete pavement at a preset sawing time;

[0030] The sawing time determination module is used to determine the predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at a preset sawing time and a pre-acquired sawing strength range.

[0031] In a third aspect, the present application further provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method in the first aspect when executing the computer program.

[0032] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the method in the first aspect when executed by a processor.

[0033] In a fifth aspect, the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the method in the first aspect are implemented.

[0034] The above-mentioned concrete pavement sawing time prediction method, device and computer equipment determine the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time based on the pre-acquired concrete related data; determine the concrete strength of the concrete pavement at the preset sawing time according to the preset day-time compressive strength and the equivalent age of the concrete pavement at the preset sawing time; determine the predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at the preset sawing time and the pre-acquired sawing strength range. This application is based on systematic calculation and analysis, and does not require construction personnel to judge the sawing time based on experience alone, which reduces the uncertainty and inaccuracy caused by personal experience differences and environmental interference, making the construction process more standardized and normalized, thereby improving overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A diagram showing an application environment of a method for predicting sawing time of a concrete pavement in one embodiment;

[0036] Figure 2 is a graph showing the relationship between sawing time and concrete strength in one embodiment;

[0037] Figure 3 A schematic diagram of a flow chart of a method for predicting sawing time of a concrete pavement in one embodiment;

[0038] Figure 4 is a flow chart of a process for determining an equivalent age at a preset sawing time in one embodiment;

[0039] Figure 5 A schematic flow chart of a process for determining temperature information at a preset sawing time according to an embodiment;

[0040] Figure 6 A schematic diagram of a process for determining an equivalent age in one embodiment;

[0041] Figure 7 A schematic diagram of a process for determining a predicted sawing time of a concrete pavement in one embodiment;

[0042] Figure 8 A schematic diagram of a process for determining a preset compressive strength according to an embodiment of the present invention;

[0043] Fig. 9 It is a structural block diagram of a device for predicting sawing time of a concrete pavement in one embodiment;

[0044] Fig.10 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] The concrete pavement sawing time prediction method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. The terminal 102 determines the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time based on the pre-acquired concrete-related data; determines the concrete strength of the concrete pavement at the preset sawing time according to the preset day-time compressive strength and the equivalent age of the concrete pavement at the preset sawing time; determines the predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at the preset sawing time and the pre-acquired sawing strength range. Among them, the terminal 102 can be but is not limited to various personal computers and laptops. The server 104 can be implemented with an independent server or a server cluster consisting of multiple servers.

[0047] In an exemplary embodiment, Figure 2 As shown, the present application provides a method for predicting the sawing time of a concrete pavement, and the method is applied to Figure 1 The terminal in is used as an example to illustrate, including the following steps:

[0048] S201, based on the pre-acquired concrete related data, determine the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time.

[0049] Among them, the sawing time is the best time to saw the concrete during the concrete pavement construction process. The appropriate sawing time is crucial to preventing problems such as cracks in the concrete pavement.

[0050] The preset compressive strength is the maximum pressure strength that the concrete pavement can withstand at a preset number of days (such as 28 days), and is one of the important indicators for measuring the quality and performance of concrete.

[0051] The equivalent age takes into account the difference in the hydration reaction rate of concrete under different temperature conditions. The time at the actual curing temperature is converted into the equivalent time at the standard curing temperature, which is used to more accurately evaluate the strength development of concrete.

[0052] In the embodiment of the present application, construction personnel obtain concrete-related data through measuring tools and material testing equipment before construction, including local ambient temperature, concrete mold temperature, concrete thickness, and concrete raw material information.

[0053] The acquired concrete raw material information is input into the water-cement ratio calculation module, which calculates the water-cement ratio according to the built-in calculation formula. Then, based on the empirical relationship between the water-cement ratio and the compressive strength of concrete, the compressive strength of the concrete pavement at a preset time is determined. Another implementation method: With the help of concrete mix design software, the concrete raw material information is input, and the software automatically calculates the water-cement ratio according to the built-in database and algorithm, and predicts the compressive strength of the concrete pavement at a preset time based on the relationship model between the water-cement ratio and the compressive strength (such as a prediction model obtained based on neural network training, which is trained with a large amount of test data and can more accurately reflect the strength relationship under complex raw material combinations).

[0054] According to the obtained concrete thickness data, the concrete is divided into several equal-thick concrete layers along the thickness direction using the one-dimensional difference method. For each concrete layer, the temperature of each concrete layer at different times is calculated based on the heat conduction equation and combined with the ambient temperature and the concrete mold entry temperature. Then the average temperature of all concrete layers at the same time is calculated to obtain the average temperature of the concrete at each time. Finally, these average temperature data are substituted into the equivalent age maturity model based on the Arrhenius function to calculate the equivalent age of the concrete. Another implementation method: In the early stage after concrete pouring (such as the first 6-12 hours), the surface temperature and internal temperature of the concrete are automatically collected at regular time intervals (such as 30 minutes). Based on these real-time temperature data, the equivalent age and strength of the concrete are recalculated using the dynamic heat conduction equation, and compared with the saw seam strength range. If it is found that the concrete strength develops too fast or too slowly in the early stage, the subsequent calculation parameters are adjusted in time.

[0055] S202, determining the concrete strength of the concrete pavement at the preset sawing time according to the preset compressive strength at the time and the equivalent age of the concrete pavement at the preset sawing time.

[0056] The embodiment of the present application substitutes the acquired equivalent age data into the equivalent age-strength fitting equation obtained through experiments built into the strength calculation module to calculate the concrete strength of the concrete pavement at the preset sawing time.

[0057] Another implementation method: the calculated equivalent age data of the concrete pavement at the preset sawing time is input into a trained strength prediction model, and the model output is the concrete strength of the concrete pavement at the preset sawing time.

[0058] S203, determining a predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at a preset sawing time and a pre-acquired sawing strength range.

[0059] The sawing strength range is determined according to relevant construction specifications or experience. It is the upper and lower limits of the strength that the concrete should reach when sawing. For example, the Technical Specifications for Construction of Cement Concrete Surface Layers at Civil Airports (MH5006-2015) stipulates that the compressive strength of concrete during sawing should be 6-8MPa. Figure 3 As shown, the most suitable sawing time is between 6-8MPa of concrete compressive strength.

[0060] In the embodiment of the present application, the terminal compares the calculated concrete strength of the concrete pavement at the preset sawing time with the sawing strength range. If the concrete strength is less than 6MPa, it means that the sawing time is too early, and it is necessary to increase a time period (such as increasing 1-2 hours, and the specific duration can be adjusted according to the actual situation), and then return to step S201 to recalculate the equivalent age, strength and other data, and compare and judge again; if the concrete strength is between 6-8MPa, then the corresponding time period is the appropriate sawing time; if the concrete strength is greater than 8MPa, it means that the sawing time is too late, stop the calculation, and output a prompt message to inform the construction personnel that the sawing time has missed the best time, and corresponding remedial measures may need to be taken.

[0061] Another implementation method: During the development of concrete strength, the above monitoring and calculation comparison are continuously performed, and when the concrete strength enters the sawing strength range for the first time, the time at this time is recorded as the predicted sawing time.

[0062] The above concrete pavement sawing time prediction method determines the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time based on the pre-acquired concrete related data; determines the concrete strength of the concrete pavement at the preset sawing time according to the preset day-time compressive strength and the equivalent age of the concrete pavement at the preset sawing time; determines the predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at the preset sawing time and the pre-acquired sawing strength range. This application is based on systematic calculation and analysis, and does not require construction personnel to judge the sawing time based on experience alone, which reduces the uncertainty and inaccuracy caused by personal experience differences and environmental interference, making the construction process more standardized and normalized, thereby improving overall construction efficiency.

[0063] In an exemplary embodiment, based on the above embodiment, see Figure 4 The concrete-related data of the embodiment of the present application includes concrete thickness data. The embodiment of the present application relates to a process for determining the equivalent age of a concrete pavement at a preset sawing time, which includes the following steps:

[0064] S301, determining the temperature information of the concrete pavement at a preset sawing time according to the concrete thickness data.

[0065] The preset sawing time is a specific time point or time period for performing the concrete sawing operation, which is the target time node for the entire prediction model calculation.

[0066] In the embodiment of the present application, a mathematical model for calculating the temperature field of concrete is constructed based on the heat conduction characteristics of concrete and the principle of one-dimensional difference method. Determine the relevant parameters in the model, such as thermal physical parameters such as thermal conductivity, specific heat capacity, density of concrete, and calculation parameters such as time step and space step. Substitute the concrete thickness data and the set parameters into the temperature calculation model. The model calculates the temperature values ​​of each position of the concrete pavement at the preset sawing time according to the heat conduction equation combined with the initial conditions and boundary conditions, thereby obtaining temperature information. In the calculation process, the temperature field equation is solved by an iterative algorithm to gradually approach the accurate temperature distribution. Another implementation method: When calculating the temperature information, in addition to considering the heat conduction process inside the concrete, the influence of environmental factors (such as solar radiation, wind speed, humidity, etc.) on the concrete temperature is fully considered. By establishing an environmental heat exchange model, the heat exchange amount between the environment and the concrete surface is calculated, and it is introduced as a boundary condition into the temperature calculation, and the temperature information is corrected to make the calculation result closer to the actual situation.

[0067] S302, determining the equivalent age of the concrete pavement at the preset sawing time according to the temperature information of the concrete pavement at the preset sawing time.

[0068] In the embodiment of the present application, the terminal can use an equivalent age maturity model based on the Arrhenius function to calculate the equivalent age. This model can better reflect the effect of temperature on the hydration reaction rate of concrete.

[0069] From the calculated temperature information of the concrete pavement at the preset sawing time, the temperature values ​​at each location are extracted and the average temperature is calculated. If the temperature information contains data on the temperature change over time, the temperature change trend can be further analyzed to more accurately evaluate the hydration process of the concrete. The average temperature is substituted into the equivalent age maturity model, and the equivalent age of the concrete pavement at the preset sawing time is calculated in combination with parameters such as the time step. During the calculation process, the equivalent age contribution in each time step is calculated in turn according to the model formula, and the total equivalent age is accumulated.

[0070] By accurately understanding the state of concrete at the preset sawing time, the embodiments of the present application can help construction personnel better plan the construction progress, reasonably arrange subsequent construction procedures, improve construction efficiency, and reduce construction delays and resource waste. For example, operating at the appropriate sawing time can avoid the concrete strength being insufficient due to early sawing and the need for rework, or the crack expansion and difficulty in repair due to late sawing.

[0071] In an exemplary embodiment, based on the above embodiment, see Figure 5 The temperature information of the embodiment of the present application includes the average temperature of the concrete layer; the embodiment of the present application relates to a process of determining the temperature information of the concrete pavement at the preset sawing time according to the concrete thickness data, including the following steps:

[0072] S401, dividing the concrete pavement according to the concrete thickness data to obtain a plurality of concrete layers of equal thickness.

[0073] In the embodiment of the present application, the number of layers to be divided into along the thickness direction of the concrete pavement is determined according to the concrete thickness and the calculation accuracy requirements, and before the concrete is poured, the template is marked according to the calculated thickness of each layer so that the position of each layer can be clearly identified in the subsequent calculation. Alternatively, when establishing a concrete temperature calculation model, the concrete model is divided into n equal-thick concrete layers in the thickness direction by setting virtual layering nodes, and each concrete layer is used as an independent calculation unit for subsequent temperature calculation.

[0074] S402, using a heat conduction equation to calculate the temperature of each concrete layer of equal thickness at the preset sawing time.

[0075] In the embodiment of the present application, the terminal can determine the thermal conductivity, specific heat capacity and density of the concrete by obtaining relevant material manuals or conducting thermophysical property tests based on the material composition of the concrete (such as cement type, aggregate type, etc.) and mix ratio. Then calculate the thermal diffusion coefficient. At the same time, obtain the ambient temperature (measured by arranging an ambient temperature sensor at the construction site), the concrete mold temperature (measured using a thermometer when the concrete is molded), etc. as boundary conditions and initial conditions.

[0076] Starting from the initial moment, the calculation is carried out step by step according to the time step. For each time step, the temperature value of the previous time step and the difference method are used to calculate the temperature of each concrete layer in the current time step. During the calculation process, boundary conditions (such as heat exchange between the concrete surface and the environment) are processed through additional boundary condition equations. The calculation is iterated until the time step corresponding to the preset sawing moment, and the temperature of each concrete layer of equal thickness at the preset sawing moment is obtained. The temperature calculation formula is shown in formula (1):

[0077] (T i+1，j =(T i，j-1+T i，j+1 )·αΔt / Δx 2 -T i，j (2αΔt / Δx 2 -1)+ΔT i，j )............(1)

[0078] Among them, T i+1，j represents the temperature of the jth concrete layer at time i+1. α represents the thermal diffusion coefficient, Δx represents the spatial step length, T j Represents the initial temperature of the jth concrete layer, which is the starting value for calculating temperature changes.

[0079] S403, performing average processing on the temperatures of multiple concrete layers of equal thickness at the preset sawing time to obtain the average temperature of the concrete layer of the concrete pavement at the preset sawing time.

[0080] In an embodiment of the present application, the temperature of each concrete layer of equal thickness at the preset sawing time is obtained, the temperature of each layer is added, and then divided by the number of layers to obtain the average temperature of the concrete layer of the concrete pavement at the preset sawing time.

[0081] The calculation of the average temperature of the concrete layer in the embodiment of the present application can provide a more reliable basis for determining the equivalent age, and thus more accurately predict the sawing time. This helps to avoid edge damage and loose stones caused by insufficient concrete strength due to sawing too early, and quality defects such as coagulation and hardening of concrete slabs and irregular shrinkage cracks caused by sawing too late, thereby ensuring the construction quality and durability of the airport pavement.

[0082] In an exemplary embodiment, based on the above embodiment, see Figure 6 The embodiment of the present application relates to a process of determining the equivalent age of a concrete pavement at a preset sawing time according to the temperature information of the concrete pavement at the preset sawing time, comprising the following steps:

[0083] S501, obtaining model parameters of the equivalent age maturity model.

[0084] The model parameters include the activation energy of the concrete hardening process, the ideal gas constant, the standard temperature and the time interval.

[0085] In the embodiment of the present application, the commonly used ranges or recommended values ​​of activation energy, ideal gas constant and standard temperature in the process of concrete hardening are obtained. For example, the range of activation energy may be between 30-50 kJ / mol (the specific value may vary depending on factors such as concrete mix ratio and raw material characteristics), the ideal gas constant is usually 8.314 J / (mol·K), and the standard temperature is set to 20°C (i.e. 293.15K). For the time interval, according to the general law of concrete strength development and the calculation accuracy requirements, it can be initially set to 1 hour (it can be adjusted and optimized according to actual conditions in subsequent calculations).

[0086] S502, inputting the model parameters and the average temperature of the concrete layer of the concrete pavement at the preset sawing time into the equivalent age maturity model for equivalent calculation processing to obtain the equivalent age of the concrete pavement at the preset sawing time.

[0087] In the embodiment of the present application, the obtained model parameters (activation energy, ideal gas constant, standard temperature, time interval) and the average temperature of the concrete layer are substituted into the equivalent age maturity model, as shown in formula (2):

[0088]

[0089] Where t(T) represents the equivalent age, n represents the number of time intervals, E represents the activation energy of the concrete hardening process, R represents the ideal gas constant, T0 represents the standard temperature, T i represents the average temperature of concrete at the i-th moment, and Δt represents the time interval.

[0090] In the calculation process, the equivalent age in each time interval is first calculated, as shown in formula (3):

[0091]

[0092] Among them, Δt eq represents the equivalent age in the i-th time interval.

[0093] Then, the equivalent age contributions in all time intervals are accumulated to obtain the equivalent age of the concrete pavement at the preset sawing time as shown in formula (4):

[0094]

[0095] Among them, t eq Indicates the equivalent age of the concrete pavement at the preset sawing time.

[0096] The embodiment of the present application obtains the parameters of the equivalent age maturity model and accurately calculates the equivalent age, which can more accurately reflect the strength development of concrete under actual curing conditions, thereby providing a more reliable basis for the prediction of sawing time. This helps to avoid concrete pavement quality problems caused by improper sawing time, such as insufficient concrete strength, edge damage and loose stones caused by early sawing, and irregular shrinkage cracks caused by late sawing, etc., to ensure the construction quality and durability of airport pavements.

[0097] In an exemplary embodiment, based on the above embodiments, the embodiments of the present application involve a process for determining the concrete strength of a concrete pavement at a preset sawing time according to the preset compressive strength at that time and the equivalent age of the concrete pavement at the preset sawing time, including: inputting the preset compressive strength at that time and the equivalent age into the strength calculation equation for calculation and processing to obtain the concrete strength of the concrete pavement at the preset sawing time.

[0098] The strength calculation equation includes the corresponding relationship between concrete strength and equivalent age, initial age and preset compressive strength. As shown in formula (5):

[0099]

[0100] Among them, f c (t) represents the strength of concrete at time t, and β represents the coefficient related to the material properties of concrete.

[0101] The embodiment of the present application substitutes the obtained preset compressive strength at the given time and the equivalent age into the selected strength calculation equation to calculate and obtain the concrete strength of the concrete pavement at the preset sawing time.

[0102] In the embodiment of the present application, concrete strength prediction helps construction personnel to better plan the construction process and reasonably arrange the time intervals of each process. For example, according to the predicted strength development, when the concrete strength is close to the required strength of the sawing seam, the sawing seam preparation work is done in advance, the construction efficiency is improved, unnecessary waiting time or rework caused by premature sawing seams due to insufficient strength is avoided, and the refined management of the construction process is realized.

[0103] In an exemplary embodiment, based on the above embodiment, see Figure 7 The embodiment of the present application relates to a process for determining a predicted sawing time of a concrete pavement according to the concrete strength of the concrete pavement at a preset sawing time and a pre-acquired sawing strength range, comprising the following steps:

[0104] S601, if the concrete strength at the preset sawing time is lower than the lower limit of the sawing strength range, the preset sawing time is updated according to the preset time interval, and the concrete strength at the updated preset sawing time is recalculated.

[0105] The embodiment of the present application obtains the concrete strength of the concrete pavement at the preset sawing time from the previously calculated results. The concrete compressive strength at the time of sawing is preferably 6-8MPa. The calculated concrete strength is compared with the sawing strength specified in the construction specification. If the concrete strength is less than the specified minimum sawing strength, a time period is added to continue to recalculate the updated concrete strength at the preset sawing time; if the concrete strength is between the specified sawing strengths, it means that the corresponding time period is the appropriate sawing time; if the concrete strength is greater than the specified maximum sawing strength, it means that the appropriate sawing time has been exceeded and the calculation is stopped.

[0106] S602, until the calculated concrete strength is within the sawing strength range, the preset sawing time corresponding to the calculated concrete strength is determined as the predicted sawing time of the concrete pavement.

[0107] In the embodiment of the present application, when the concrete strength is within the sawing strength range, the current corresponding preset sawing time is determined as the predicted sawing time of the concrete pavement. The predicted sawing time is recorded and output to guide construction personnel to perform sawing operations in actual construction.

[0108] The embodiment of the present application can accurately determine the optimal sawing time for the concrete pavement by continuously monitoring and adjusting the preset sawing time until the concrete strength reaches the sawing strength range. This helps to avoid problems such as insufficient concrete strength caused by sawing too early, edge damage, loose stones, etc., and quality defects such as coagulation and hardening of concrete slabs caused by sawing too late, resulting in irregular shrinkage cracks, etc., thereby ensuring the construction quality and durability of the concrete pavement.

[0109] In an exemplary embodiment, based on the above embodiment, see Figure 8 The concrete-related data of the embodiment of the present application include water quality, cement quality and fly ash quality; the embodiment of the present application involves a process for determining the preset compressive strength of a concrete pavement, including the following steps:

[0110] S701, determine the water-cement ratio of the concrete pavement based on the quality of water, cement and fly ash.

[0111] In the embodiment of the present application, the measured water mass, cement mass and fly ash mass are substituted into the formula to calculate the water-cement ratio of the concrete pavement. The formula of the water-cement ratio is shown in formula (6):

[0112]

[0113] Among them, m water Indicates water quality, m cement Indicates cement mass, mFA Indicates the mass of fly ash.

[0114] S702: Substitute the water-cement ratio into a previously acquired corresponding relationship between the water-cement ratio and the concrete strength to obtain a preset compressive strength of the concrete pavement.

[0115] In the embodiment of the present application, the water-cement ratio is substituted into the previously obtained corresponding relationship between the water-cement ratio and the concrete strength, and the corresponding relationship between the water-cement ratio and the concrete strength of the preset compressive strength of the concrete pavement is obtained as shown in formula (7):

[0116]

[0117] Among them, A and B are empirical coefficients, which can be determined through experiments based on the type of cement and aggregate used.

[0118] The embodiment of the present application uses the corresponding relationship between water-cement ratio and concrete strength to reasonably adjust the water-cement ratio according to the expected strength requirements when designing the concrete mix ratio, while considering the quality and characteristics of raw materials such as water, ash and fly ash. This makes the concrete mix ratio more optimized and can meet the strength requirements.

[0119] In an exemplary embodiment, based on the above embodiment, the method of the embodiment of the present application further includes the following steps:

[0120] Step 1: Determine the water-cement ratio of the concrete pavement according to the water quality, cement quality and fly ash quality in the concrete related data; substitute the water-cement ratio into the previously obtained corresponding relationship between the water-cement ratio and the concrete strength to obtain the preset compressive strength of the concrete pavement;

[0121] Step 2: Divide the concrete pavement according to the concrete thickness data to obtain multiple equal-thickness concrete layers; use the heat conduction equation to calculate the temperature of each equal-thickness concrete layer at the preset sawing time; average the temperatures of multiple equal-thickness concrete layers at the preset sawing time to obtain the average temperature of the concrete layer in the temperature information of the concrete pavement at the preset sawing time;

[0122] Step 3: Obtain model parameters of the equivalent age maturity model; input the model parameters and the average temperature of the concrete layer of the concrete pavement at the preset sawing time into the equivalent age maturity model for equivalent calculation processing to obtain the equivalent age of the concrete pavement at the preset sawing time;

[0123] Step 4: Input the preset compressive strength at the time of day and the equivalent age into the strength calculation equation for calculation and processing to obtain the concrete strength of the concrete pavement at the preset sawing time;

[0124] Step 5: If the concrete strength at the preset sawing joint moment is lower than the lower limit of the sawing joint strength range, the preset sawing joint moment is updated according to the preset time interval, and the concrete strength at the updated preset sawing joint moment is recalculated; until the calculated concrete strength is within the sawing joint strength range, the preset sawing joint moment corresponding to the calculated concrete strength is determined as the predicted sawing joint time of the concrete pavement.

[0125] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0126] Based on the same inventive concept, the embodiment of the present application also provides a concrete pavement sawing time prediction device for implementing the concrete pavement sawing time prediction method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the concrete pavement sawing time prediction device provided below can refer to the limitations of the concrete pavement sawing time prediction method above, and will not be repeated here.

[0127] In one embodiment, Fig. 9 As shown, a concrete pavement sawing time prediction device 800 is provided, comprising:

[0128] The strength age determination module 801 is used to determine the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time based on the pre-acquired concrete related data;

[0129] A concrete strength determination module 802 is used to determine the concrete strength of the concrete pavement at a preset sawing time according to the preset compressive strength at the time and the equivalent age of the concrete pavement at the preset sawing time;

[0130] The sawing time determination module 803 is used to determine the predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at the preset sawing time and the pre-acquired sawing strength range.

[0131] In one embodiment, the above concrete related data includes concrete thickness data, and the strength age determination module:

[0132] A temperature determination unit, used to determine the temperature information of the concrete pavement at a preset sawing time according to the concrete thickness data;

[0133] The age determination unit is used to determine the equivalent age of the concrete pavement at the preset sawing time according to the temperature information of the concrete pavement at the preset sawing time.

[0134] In one embodiment, the temperature information includes an average temperature of the concrete layer; and the temperature determination unit includes:

[0135] The test block division subunit is used to divide the concrete pavement according to the concrete thickness data to obtain multiple concrete layers of equal thickness;

[0136] The temperature determination subunit is used to calculate the temperature of each concrete layer of equal thickness at the preset sawing time by using the heat conduction equation;

[0137] The average temperature determination subunit is used to perform average processing on the temperatures of multiple concrete layers of equal thickness at the preset sawing time to obtain the average temperature of the concrete layer of the concrete pavement at the preset sawing time.

[0138] In one embodiment, the age determination unit includes:

[0139] The parameter acquisition subunit is used to obtain the model parameters of the equivalent age maturity model; the model parameters include the activation energy, ideal gas constant, standard temperature and time interval of the concrete hardening process;

[0140] The age determination subunit is used to input the model parameters and the average temperature of the concrete layer of the concrete pavement at the preset sawing time into the equivalent age maturity model for equivalent calculation processing to obtain the equivalent age of the concrete pavement at the preset sawing time.

[0141] In one embodiment, the concrete strength determination module includes:

[0142] The concrete strength determination unit is used to input the preset compressive strength at the time of day and the equivalent age into the strength calculation equation for calculation and processing, so as to obtain the concrete strength of the concrete pavement at the preset sawing time; the strength calculation equation includes the corresponding relationship between the concrete strength and the equivalent age, the initial age and the preset compressive strength at the time of day.

[0143] In one embodiment, the sawing time determination module includes:

[0144] A strength updating unit, for updating the preset sawing time according to a preset time interval if the concrete strength at the preset sawing time is lower than the lower limit of the sawing strength range, and recalculating the concrete strength at the updated preset sawing time;

[0145] The sawing time determination unit is used to determine the preset sawing time corresponding to the calculated concrete strength as the predicted sawing time of the concrete pavement until the calculated concrete strength is within the sawing strength range.

[0146] In one embodiment, the concrete-related data includes water quality, cement quality and fly ash quality; and the strength age determination module includes:

[0147] A water-cement ratio determination unit, used for determining the water-cement ratio of the concrete pavement according to the water quality, cement quality and fly ash quality;

[0148] The strength determination unit is used to substitute the water-cement ratio into the pre-acquired corresponding relationship formula between the water-cement ratio and the concrete strength to obtain the preset compressive strength of the concrete pavement.

[0149] Each module in the above concrete pavement sawing time prediction device can be implemented in whole or in part by software, hardware and their combination. Each module can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each module above.

[0150] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Fig.10As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for predicting the sawing time of a concrete pavement is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0151] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0152] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0153] Based on the concrete related data acquired in advance, determine the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time;

[0154] Determine the concrete strength of the concrete pavement at the preset sawing time according to the preset compressive strength at day time and the equivalent age of the concrete pavement at the preset sawing time;

[0155] The predicted sawing time of the concrete pavement is determined according to the concrete strength of the concrete pavement at the preset sawing time and the sawing strength range obtained in advance.

[0156] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0157] Determine the temperature information of the concrete pavement at the preset sawing time according to the concrete thickness data;

[0158] According to the temperature information of the concrete pavement at the preset sawing time, the equivalent age of the concrete pavement at the preset sawing time is determined.

[0159] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0160] The concrete pavement is divided according to the concrete thickness data to obtain multiple concrete layers of equal thickness;

[0161] The heat conduction equation is used to calculate the temperature of each concrete layer of equal thickness at the preset sawing time;

[0162] The temperatures of multiple concrete layers of equal thickness at the preset sawing time are averaged to obtain the average temperature of the concrete layer of the concrete pavement at the preset sawing time.

[0163] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0164] Obtaining model parameters of the equivalent age maturity model; the model parameters include activation energy, ideal gas constant, standard temperature and time interval of the concrete hardening process;

[0165] The model parameters and the average temperature of the concrete layer of the concrete pavement at the preset sawing time are input into the equivalent age maturity model for equivalent calculation processing to obtain the equivalent age of the concrete pavement at the preset sawing time.

[0166] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0167] The preset compressive strength at the time of day and the equivalent age are input into the strength calculation equation for calculation and processing to obtain the concrete strength of the concrete pavement at the preset sawing time; the strength calculation equation includes the corresponding relationship between the concrete strength and the equivalent age, the initial age and the preset compressive strength at the time of day.

[0168] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0169] If the concrete strength at the preset sawing time is lower than the lower limit of the sawing strength range, the preset sawing time is updated according to the preset time interval, and the concrete strength at the updated preset sawing time is recalculated;

[0170] When the calculated concrete strength is within the sawing strength range, the preset sawing time corresponding to the calculated concrete strength is determined as the predicted sawing time of the concrete pavement.

[0171] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0172] Determine the water-cement ratio of concrete pavement based on the quality of water, cement and fly ash;

[0173] Substitute the water-cement ratio into the previously obtained corresponding relationship between the water-cement ratio and the concrete strength to obtain the preset compressive strength of the concrete pavement.

[0174] According to some embodiments of the present application, a computer program product is also provided, and when the computer program is executed by a processor, the above method can be implemented. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, part or all of the above method can be implemented in whole or in part according to the process or function of the embodiment of the present application.

[0175] According to some embodiments of the present application, there is also provided a non-transitory computer-readable storage medium including instructions, such as a memory including instructions, and the above instructions can be executed by a processor of an electronic device to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0176] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards of relevant countries and regions.

[0177] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0178] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0179] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for predicting the sawing time of a concrete pavement, characterized in that: The method comprises: Determine the preset day-time compressive strength of the concrete pavement and the equivalent age of the concrete pavement at the preset sawing time based on the pre-acquired concrete related data; Determining the concrete strength of the concrete pavement at the preset sawing time according to the preset day-time compressive strength and the equivalent age of the concrete pavement at the preset sawing time; The predicted sawing time of the concrete pavement is determined according to the concrete strength of the concrete pavement at the preset sawing time and the sawing strength range acquired in advance.

2. The method according to claim 1, characterized in that The concrete related data includes concrete thickness data, and the process of determining the equivalent age of the concrete pavement at the preset sawing time includes: Determine the temperature information of the concrete pavement at a preset sawing time according to the concrete thickness data; According to the temperature information of the concrete pavement at the preset sawing time, the equivalent age of the concrete pavement at the preset sawing time is determined.

3. The method according to claim 2, characterized in that The temperature information includes an average temperature of the concrete layer; the temperature information of the concrete pavement at a preset sawing time is determined according to the concrete thickness data, including: Dividing the concrete pavement according to the concrete thickness data to obtain a plurality of concrete layers of equal thickness; Using the heat conduction equation, the temperature of each of the equal-thickness concrete layers at the preset sawing time is calculated respectively; The temperatures of the plurality of concrete layers of equal thickness at the preset sawing time are averaged to obtain the average temperature of the concrete layer of the concrete pavement at the preset sawing time.

4. The method according to claim 3, characterized in that The step of determining the equivalent age of the concrete pavement at the preset sawing time according to the temperature information of the concrete pavement at the preset sawing time comprises: Obtaining model parameters of the equivalent age maturity model; the model parameters include activation energy, ideal gas constant, standard temperature and time interval of the concrete hardening process; The model parameters and the average temperature of the concrete layer of the concrete pavement at the preset sawing time are input into the equivalent age maturity model for equivalent calculation processing to obtain the equivalent age of the concrete pavement at the preset sawing time.

5. The method according to claim 1, characterized in that The method of determining the concrete strength of the concrete pavement at the preset sawing time according to the preset compressive strength at day time and the equivalent age of the concrete pavement at the preset sawing time comprises: The preset compressive strength at the time of day and the equivalent age are input into the strength calculation equation for calculation processing to obtain the concrete strength of the concrete pavement at the preset sawing time; the strength calculation equation includes the corresponding relationship between the concrete strength and the equivalent age, the initial age and the preset compressive strength at the time of day.

6. The method according to claim 1, characterized in that The method of determining the predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at the preset sawing time and the sawing strength range obtained in advance comprises: If the concrete strength at the preset sawing time is lower than the lower limit of the sawing strength range, the preset sawing time is updated according to a preset time interval, and the concrete strength at the updated preset sawing time is recalculated; When the calculated concrete strength is within the sawing strength range, the preset sawing time corresponding to the calculated concrete strength is determined as the predicted sawing time of the concrete pavement.

7. The method according to claim 1, characterized in that The concrete related data includes water quality, cement quality and fly ash quality; the process of determining the preset compressive strength of the concrete pavement includes: Determining the water-cement ratio of the concrete pavement according to the water mass, the cement mass and the fly ash mass; The water-cement ratio is substituted into a previously acquired corresponding relationship formula between the water-cement ratio and the concrete strength to obtain the preset compressive strength of the concrete pavement.

8. A concrete pavement sawing time prediction device, characterized in that: The device comprises: A strength age determination module, for determining a preset day-time compressive strength of a concrete pavement and an equivalent age of the concrete pavement at a preset sawing time based on pre-acquired concrete related data; A concrete strength determination module, for determining the concrete strength of the concrete pavement at the preset sawing time according to the preset day-time compressive strength and the equivalent age of the concrete pavement at the preset sawing time; The sawing time determination module is used to determine the predicted sawing time of the concrete pavement according to the concrete strength of the concrete pavement at the preset sawing time and the pre-acquired sawing strength range.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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