Mass concrete early temperature prediction method and system, electronic equipment and storage medium
Through a simplified temperature prediction method, the temperature increase caused by concrete hydration and the temperature drop caused by cooling pipe cooling are calculated. Combined with the initial temperature, the problem of large-volume concrete is solved, and the problem of large-volume concrete is large in calculation and time-consuming, achieving fast and accurate temperature prediction.
Patent Information
- Application Number
- CN202510212534.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2025-07-11
AI Technical Summary
The existing early temperature prediction methods for large volume concrete have many factors to consider, and the prediction process is large in quantity and time-consuming, making it difficult to meet the needs of fast and real-time prediction in actual construction.
By calculating the temperature increase value caused by hydration of concrete and the temperature drop caused by cooling of cooling pipes, combined with the initial temperature of concrete, the early temperature of concrete is predicted using a simplified formula, and the temperature prediction is carried out using a data acquisition module, a variable input module, a cooling pipe parameter calculation module, a hydration heat calculation module and an early temperature prediction module.
A rapid and more accurate prediction of the early temperature of concrete at different time periods before complete condensation is achieved, meeting the needs of rapid real-time prediction in actual construction.
Smart Images
Figure CN120299570A_ABST
Abstract
Description
Background Art
[0002] Mass concrete is widely used in construction projects. During the setting process after the pouring of mass concrete, the temperature change inside the concrete has a crucial impact on its performance and quality. The hydration reaction of cement in the concrete will release a large amount of heat. Due to the relatively small specific surface area of mass concrete, the heat dissipation is slow. Therefore, the early temperature of mass concrete has a tendency to continuously rise. If the temperature cannot be reduced in time, it may cause excessive temperature stress inside the concrete, leading to quality problems such as cracks.
[0003] In the prior art, cooling pipes are often laid in mass concrete structures, and the early temperature of mass concrete is controlled by circulating cooling water in the cooling pipes. In order to control the early temperature of mass concrete within a reasonable range, accurate monitoring and prediction of the early temperature of mass concrete are required. Among them, the monitoring of the early temperature mainly relies on setting temperature detection devices at various positions inside the mass concrete, and the prediction of the early temperature generally realizes the establishment of a mathematical model of the early temperature change of mass concrete through theoretical analysis and experimental research.
[0004] Since concrete is a complex multi-phase composite material, its thermal physical properties are affected by many factors, such as cement variety, aggregate type, water-cement ratio, etc. Therefore, traditional concrete temperature prediction methods are often relatively complex and need to consider many factors, such as the thermal physical properties of concrete, boundary conditions, cement hydration reaction kinetics, etc. This makes the prediction process time-consuming and computationally intensive, and there are inevitably errors in the acquisition process of many parameters. The superposition of errors of different parameters will lead to a large deviation between the prediction result and the actual situation, making it difficult to meet the requirements of rapid real-time prediction in actual construction. Summary of the Invention
[0005] Aiming at the technical problems that the existing early temperature prediction method for mass concrete considers many factors, the prediction process is computationally intensive and time-consuming, and it is difficult to meet the requirements of rapid real-time prediction in actual construction, the present invention provides an early temperature prediction method, system, electronic device and storage medium for mass concrete, and gives a relatively simplified early temperature prediction method for mass concrete, which can quickly and relatively accurately predict the early temperature of concrete at different time periods before complete setting.
[0006] In the first aspect, the present invention provides an early temperature prediction method for mass concrete, and the steps include: S1. Obtain the initial temperature of the concrete and the cooling water parameters of the concrete cooling pipe; S2. Calculate the temperature rise value caused by concrete hydration within the time period where the start time of is the time when the concrete starts to set, The end time is earlier than the final setting time of the concrete; S3. Calculate the temperature drop value of the concrete caused by each cooling pipe within according to the initial temperature of the concrete and the cooling water parameters of the concrete cooling pipes; S4. Predict the early temperature of the concrete at the end of based on the early temperature calculation formula of the concrete. The early temperature calculation formula of the concrete is:
[0007] In the formula, is the predicted value of the early temperature of the concrete at the end of , with the unit of °C; is the initial temperature of the concrete, with the unit of °C; is the temperature rise value caused by the hydration of the concrete within, with the unit of °C; is the temperature drop value of the concrete caused by the i-th cooling pipe within , with the unit of °C; n is the number of cooling pipes.
[0008] It should be further noted that the cooling water parameters of the concrete cooling pipes include the water temperature at the inlet of the cooling pipe and the flow rate of the cooling water in the cooling pipe.
[0009] It should be further noted that in step S2, the calculation formula for the temperature rise value caused by the hydration of the concrete within is:
[0010] In the formula, is the temperature rise value caused by the hydration of the concrete within; is the density of the concrete; is the specific heat capacity of the concrete; is the cumulative heat released within, and the calculation formula of is:
[0011] Among them, is a function of the degree of hydration heat development of the cement used in the concrete over time, is the maximum potential hydration heat of the cement used in the concrete.
[0012] It should be further noted that in step S3, the cooling effect formula for each cooling pipe is as follows:
[0013] In the formula, is the time period, with the unit of min; represents the temperature drop caused by the i-th cooling pipe within , with the unit of °C; represents the initial temperature of the concrete, with the unit of °C; represents the average water temperature at the inlet of the i-th cooling pipe within , with the unit of °C; represents the average flow rate of the cooling water in the i-th cooling pipe within , with the unit of L / min; and are parameters to be determined. The steps to determine and are as follows: S301. Set m different time points during the concrete setting process. Keep the water temperature at the inlet of each cooling pipe the same during the time period from the start of concrete setting to each time point, and measure the actual temperature of the concrete at each time point. The actual temperature of the concrete at the j-th time point is denoted as ; S302. Denote the temperature rise value caused by hydration of the concrete from the start of setting to the j-th time point as , with the unit of °C. The calculation formula for is:
[0014] In the formula, is the temperature rise value caused by hydration of the concrete from the start of setting to the j-th time point; is the density of the concrete; is the specific heat capacity of the concrete; is the cumulative heat released by the concrete from the start of setting to the j-th time point. The calculation formula for is:
[0015] Among them, is a function of the degree of hydration heat development of the cement used in the concrete over time, is the maximum potential hydration heat of the cement used in the concrete; S303. Denote the actual total temperature drop caused by all cooling pipes from the start of concrete setting to the j-th time point as , with the unit of °C, . The calculation formula of
[0016] In the formula, The initial temperature of the concrete, with the unit of °C; S304. Use the least squares method to determine and . Define the objective function as:
[0017] Among them, Represents the predicted total temperature drop caused by all cooling pipes from the start of setting to the j-th time point, . The calculation formula of
[0018] In the formula, Is the duration from the start of concrete setting to the j-th time point, with the unit of min; Represents the initial temperature of the concrete, with the unit of °C; Represents The average water temperature at the inlet of the cooling pipes inside, with the unit of °C; Represents in The total average flow rate of the cooling water in all cooling pipes, with the unit of L / min; S305. Use the optimization algorithm to minimize the objective function and calculate the optimal and values.
[0019] In the second aspect, the present invention provides a large-volume concrete early temperature prediction system for implementing the above-mentioned large-volume concrete early temperature prediction method, including: A data acquisition module for obtaining the temperature of the concrete and the cooling water parameters of the concrete cooling pipes; A variable input module for inputting the time period; A cooling pipe parameter calculation module for calculating the concrete temperature drop value caused by each cooling pipe within the time period; A hydration heat calculation module for calculating the temperature rise value caused by concrete hydration within the time period; An early temperature prediction module for predicting the early temperature of the concrete at the end of the time period; The result output and display module is used to store and display the collected data, the intermediate data during the calculation process, and the early concrete temperature prediction results.
[0020] Furthermore, it should be noted that the data acquisition module includes a concrete temperature acquisition module, a cooling water temperature acquisition module, and a cooling water flow rate acquisition module. The concrete temperature acquisition module includes a surface temperature sensor arranged on the concrete surface and an inner layer temperature sensor at different depths inside the concrete structure; the cooling water temperature acquisition module includes a cooling water temperature sensor arranged at the inlet of each cooling pipe, and the cooling water flow rate acquisition module includes a flow rate sensor arranged inside each cooling pipe.
[0021] In a third aspect, the present invention provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor is used to implement the steps of the above-mentioned early concrete temperature prediction method when executing the computer program.
[0022] In a fourth aspect, the present invention provides a storage medium, on which a computer program is stored. The computer program implements the steps of the above-mentioned early concrete temperature prediction method when executed by a processor.
[0023] The beneficial effects of the present invention are as follows: The early concrete temperature prediction method, system, electronic device, and storage medium provided by the present invention predict the early temperature of concrete at the end of a time period by separately calculating the temperature rise value caused by concrete hydration within the time period and the temperature drop value of concrete caused by cooling of the cooling pipes, combined with the temperature at the start of concrete setting. It provides a relatively simplified early concrete temperature prediction method, avoiding the problems of large prediction calculation amount and long time consumption caused by the need to consider numerous complex influencing factors in traditional prediction methods. It can quickly and relatively accurately predict the early temperature of concrete at different time periods before complete setting, meeting the need for rapid real-time prediction of the early temperature of mass concrete in actual construction. Brief Description of the Drawings
[0024] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0025] Figure 1 It is a flowchart of the early concrete temperature prediction method in an embodiment of the present invention.
[0026] Figure 2They are parameters in the formula for determining the cooling effect of the cooling pipe in an embodiment of the present invention and The flowchart of the steps
[0027] Figure 3 It is a schematic block diagram of a large-volume concrete early temperature prediction system in an embodiment of the present invention
[0028] Figure 4 It is a schematic diagram of the hardware structure of an electronic device in an embodiment of the present invention Detailed implementation manners
[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will describe the technical solutions in the embodiments of the present invention clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention
[0030] The large-volume concrete early temperature prediction method involved in this application mainly aims at the prediction of the early temperature of large-volume concrete. During the setting process of large-volume concrete, by calculating the temperature rise value caused by concrete hydration and the temperature drop value of concrete caused by the cooling of the cooling pipe within the time period respectively, and combining the temperature at the start of setting of the concrete, the early temperature of the concrete at the end of the time period is predicted, providing a relatively simplified large-volume concrete early temperature prediction method, avoiding the problems of large prediction calculation amount and long time consumption caused by the need to consider many complex influencing factors in the traditional prediction method, and can quickly and relatively accurately predict the early temperature of concrete at different time periods before complete setting
[0031] The large-volume concrete early temperature prediction method involved in this application mainly aims at the technical problems of the existing large-volume concrete early temperature prediction method, which considers many factors, has a large calculation amount and a long time consumption in the prediction process, and is difficult to meet the rapid real-time prediction requirements in actual construction
[0032] The following will describe in detail the large-volume concrete early temperature prediction method involved in this application. For the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are proposed to thoroughly understand the embodiments of this application. However, those skilled in the art should clearly understand that this application can also be implemented in other embodiments without these specific details
[0033] In the method for predicting the early temperature of mass concrete involved in this application, the term "including" indicates the existence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their collections. The terms "including", "comprising", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0034] For the convenience of clearly describing the technical solutions of this application, words such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and roles. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit to being different.
[0035] Statements such as "in one embodiment" or "in some embodiments" described in this application mean that the specific features, structures, or characteristics described in the embodiment are included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" and the like that appear in different places in this application do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.
[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0037] The method for predicting the early temperature of mass concrete provided by the embodiments of the present invention is executed by a computer device. Correspondingly, the system for predicting the early temperature of mass concrete runs in the computer device.
[0038] Figure 1 is a flowchart of the method for predicting the early temperature of mass concrete according to an embodiment of the present invention. Among them, Figure 1 The execution subject can be the system for predicting the early temperature of mass concrete. According to different requirements, the order of the steps in this flowchart can be changed, and some can be omitted.
[0039] As Figure 1 shown, the method for predicting the early temperature of mass concrete includes: In a first aspect, the present invention provides a method for predicting the early temperature of mass concrete, and the steps include: S1. Obtain the initial temperature of the concrete and the cooling water parameters of the concrete cooling pipes.
[0040] Accurately obtaining the initial temperature of the concrete and the cooling water parameters of the concrete cooling pipes enables the entire prediction method to be based on the actual situation, improving the accuracy and reliability of the prediction.
[0041] In some embodiments, the cooling water parameters of the concrete cooling pipes include the water temperature at the inlet of the cooling pipes and the flow rate of the cooling water in the cooling pipes.
[0042] S2. Calculate the temperature rise value caused by concrete hydration within the time period where the start time of is the time when the concrete starts to set, and the end time of
[0043] is earlier than the final setting time of the concrete. In some embodiments, the calculation formula for the temperature rise value caused by concrete hydration within
[0044] is as follows: is the temperature rise value caused by concrete hydration within is the density of the concrete; is the specific heat capacity of the concrete; is the cumulative heat released within and the calculation formula for
[0045] is: where is a function of the degree of hydration heat development of the cement used in the concrete over time, and
[0046] is the maximum potential hydration heat of the cement used in the concrete.
[0047] In some embodiments, the fitting method of is to first obtain the curve of the hydration heat of the cement used in the concrete released over time through experiments, then fit the curve using a mathematical model, and then calculate the degree of hydration heat development at different time points according to the fitted function.
[0048] The development of hydration heat over time can be accurately obtained and predicted by fitting curves through experimental data combined with a mathematical model, further improving the accuracy of calculating the temperature rise caused by hydration heat.
[0049] S3. Calculate the temperature drop of the concrete caused by each cooling pipe within using the initial temperature of the concrete and the cooling water parameters of the concrete cooling pipes.
[0050] Since the cooling pipes play a key role in controlling the concrete temperature, accurately calculating their cooling effect can better simulate the actual temperature change process of the concrete, contributing to improving the accuracy of the prediction results.
[0051] In some embodiments, the cooling effect formula for each cooling pipe is:
[0052] In the formula, is the time period, with the unit of min; represents the temperature drop caused by the i-th cooling pipe within , with the unit of °C; represents the initial temperature of the concrete, with the unit of °C; represents the average water temperature at the inlet of the i-th cooling pipe within , with the unit of °C; represents the average flow rate of the cooling water in the i-th cooling pipe within , with the unit of L / min; and are parameters to be determined. As shown in Figure 2 , in some embodiments, the steps to determine and are as follows: S301. Set m different time points during the concrete setting process. Keep the water temperature at the inlet of each cooling pipe the same during the time period from the start of concrete setting to each time point, and measure the actual temperature of the concrete at each time point. The actual temperature of the concrete at the j-th time point is denoted as ; S302. Denote the temperature rise value caused by hydration of the concrete from the start of setting to the j-th time point as , with the unit of °C. The calculation formula for is:
[0053] In the formula, is the temperature rise value caused by the hydration of concrete from the start of setting to the j-th time point; is the density of the concrete; is the specific heat capacity of the concrete; is the total heat released cumulatively by the concrete from the start of setting to the j-th time point, The calculation formula of is:
[0054] where, is a function of the degree of development of the heat of hydration of the cement used in the concrete over time, is the maximum potential heat of hydration of the cement used in the concrete; S303. Denote the actual total value of the temperature drop caused by all cooling pipes from the start of concrete setting to the j-th time point as , with the unit of °C, The calculation formula of is:
[0055] In the formula, is the initial temperature of the concrete, with the unit of °C; S304. Use the least squares method to determine and , and define the objective function as:
[0056] where, represents the predicted total value of the temperature drop caused by all cooling pipes from the start of setting to the j-th time point, The calculation formula of is:
[0057] In the formula, is the duration from the start of concrete setting to the j-th time point, with the unit of min; represents the initial temperature of the concrete, with the unit of °C; represents the average water temperature at the inlet of the internal cooling pipes, with the unit of °C; represents within the total average flow rate of the cooling water in all cooling pipes, with the unit of L / min; S305. Use the optimization algorithm to minimize the objective function and calculate the optimal and values.
[0058] S4. Predict the early - stage temperature of concrete at the end according to the early - stage temperature calculation formula of concrete. The early - stage temperature calculation formula of concrete is as follows: At the end, the early - stage temperature prediction value of concrete, where the early - stage temperature calculation formula of concrete is:
[0059] In the formula: is the predicted value of the early - stage temperature of concrete at the end, with the unit of °C; At the end is the initial temperature of concrete, with the unit of °C; is the temperature rise value caused by the hydration of concrete within, with the unit of °C; is the temperature drop value of concrete caused by the i - th cooling pipe within At the end, with the unit of °C; n is the number of cooling pipes.
[0060] Combined with the data obtained and calculated in the previous steps, the final predicted temperature is obtained through a unified formula. The calculation process is simple and clear. At the same time, it also ensures that the prediction result can comprehensively consider the influence of various factors, improving the accuracy and practicality of the prediction.
[0061] The following is an embodiment of the large - volume concrete early - stage temperature prediction system provided by the present disclosure. The large - volume concrete early - stage temperature prediction system and the large - volume concrete early - stage temperature prediction methods in the above - mentioned embodiments belong to the same inventive concept. For the details not described in detail in the embodiment of the large - volume concrete early - stage temperature prediction system, reference can be made to the embodiments of the large - volume concrete early - stage temperature prediction methods above.
[0062] Now, the mobile terminal implementing each embodiment of the present invention will be described with reference to the drawings. In the following description, suffixes such as "module", "component", or "unit" used to represent elements are only for the convenience of describing the embodiments of the present invention, and they have no specific meaning themselves. Therefore, "module" and "component" can be used interchangeably.
[0063] As Figure 3 shown, the large - volume concrete early - stage temperature prediction system includes: A data acquisition module for obtaining the initial temperature of concrete and the cooling water parameters of the concrete cooling pipes; A variable input module for inputting the time period; A cooling pipe parameter calculation module for calculating the temperature drop value of concrete caused by each cooling pipe within the time period; A heat of hydration calculation module for calculating the temperature rise value caused by the hydration of concrete within the time period; An early temperature prediction module for predicting the early temperature of concrete at the end of a time period; A result output and display module for storing and displaying the collected data, intermediate data during the calculation process, and the early temperature prediction result of concrete.
[0064] This application also provides an electronic device for implementing various embodiments of the present invention. The electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor.
[0065] Those skilled in the art can understand that the structure of the electronic device involved in the embodiments of the present invention does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.
[0066] Figure 4 A schematic hardware structure diagram of an electronic device for implementing various embodiments of the present invention.
[0067] The electronic device 500 includes, but is not limited to: components such as a processor 501, a network module 502, an audio output unit 503, an input unit 504, a display unit 506, a user input unit 507, an interface unit 508, and a memory 509. Those skilled in the art can understand that the structure of the electronic device involved in the embodiments of the present invention does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.
[0068] In the embodiments of the present invention, the electronic device includes, but is not limited to, a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The electronic device may also represent various forms of mobile devices and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present application described herein and / or claimed.
[0069] In the embodiments of the present application, the processor 501 may be implemented by using at least one of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a processor, a controller, a microcontroller, a microprocessor, and an electronic unit designed to execute the functions described herein. In some cases, such an implementation may be implemented in the controller. For a software implementation, an implementation of a process or function may be implemented with a separate software module that permits execution of at least one function or operation. The software code may be implemented by a software application (or program) written in any appropriate programming language. The software code may be stored in a memory and executed by the controller.
[0070] The display unit 506 is configured to display information input by the user or information provided to the user. The display unit 506 may include a display panel, and the display panel may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
[0071] The user input unit 507 may include, but is not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be elaborated herein.
[0072] The interface unit 508 is an interface for connecting an external device to the electronic device 500. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headset port, and the like.
[0073] In addition, the electronic device 500 includes some functional modules not shown herein, which will not be elaborated herein.
[0074] Those skilled in the art can understand that various aspects of the electronic device provided in the present application can be implemented as a system, a method, or a program product. Therefore, various aspects of the present disclosure can be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation combining hardware and software aspects, which can be collectively referred to as "circuit", "module", or "system" herein.
[0075] The present application also provides a storage medium, in which a program product capable of implementing the early temperature prediction method for mass concrete is stored. In some possible implementation manners, various aspects of the present disclosure can also be implemented in the form of a program product, which includes program code. When the program product runs on a terminal device, the program code is used to cause the terminal device to execute the steps according to various exemplary embodiments of the present disclosure described in the above "Exemplary Method" section of this specification.
[0076] The storage medium can adopt any combination of one or more readable media. The readable media can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.
[0077] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A method for predicting the early temperature of mass concrete, characterized in that the steps are as follows Including: S1. Obtain the initial temperature of the concrete and the cooling water parameters of the concrete cooling pipes; S2. Calculate the temperature rise value caused by concrete hydration during the time period where the start time of is the time when the concrete starts to set, and the end time of is earlier than the final setting time of the concrete; S3. Calculate the temperature drop value of the concrete caused by each cooling pipe within according to the initial temperature of the concrete and the cooling water parameters of the concrete cooling pipes; S4. Predict the early-age temperature of concrete at the end of using the early-age temperature calculation formula for concrete, which is: Wherein, is the predicted value of the early concrete temperature at the end, with the unit of °C; is the initial temperature of the concrete, in °C; is the temperature rise value caused by the hydration of internal concrete, with the unit of °C; is the temperature drop value of the concrete caused by the i-th cooling pipe in °C; n is the number of cooling pipes.
2. The early temperature prediction method for mass concrete according to claim 1, wherein The cooling water parameters of the concrete cooling pipes include the water temperature at the inlet of the cooling pipes and the flow rate of the cooling water in the cooling pipes.
3. The early temperature prediction method for mass concrete according to claim 1, characterized in that In step S2, The calculation formula for the temperature rise value caused by the hydration of internal concrete is as follows: In the formula, is the temperature rise value caused by the hydration of internal concrete; is the density of the concrete; is the specific heat capacity of concrete; is the cumulative heat released inside The calculation formula of Among them, is a function of the degree of development of the heat of hydration of the cement used in the concrete over time, is the maximum potential heat of hydration of the cement used in the concrete.
4. The early temperature prediction method for mass concrete according to claim 3, characterized in that The fitting method is to first obtain the curve of the heat of hydration of the cement used in the concrete released over time through experiments, then use a mathematical model to fit this curve, and then calculate the degree of development of the heat of hydration at different time points according to the fitted function.
5. The early temperature prediction method for mass concrete according to claim 2, characterized in that, In step S3, the cooling effect formula for each cooling pipe is: wherein, is the time period, with the unit of min; Denote the temperature drop caused by the i-th cooling pipe within in °C; represents the initial temperature of the concrete, in °C; Denote the average water temperature at the inlet of the i-th cooling tube within, unit: °C; Denote the average flow velocity of the cooling water in the i-th cooling pipe, with the unit of L / min; and are parameters to be determined. The steps to determine and are as follows: S301. Set m different time points during the concrete setting process. Keep the water temperature at the inlet of each cooling pipe the same during the time period from the start of concrete setting to each time point, and measure the actual temperature of the concrete at each time point. The actual temperature of the concrete at the j-th time point is denoted as ; S302. Denote the temperature rise value caused by the hydration of concrete from the start of setting to the j-th time point as , with the unit of °C, . The calculation formula of In the formula, is the temperature rise value caused by the hydration of concrete from the start of setting to the j-th time point; is the density of the concrete; is the specific heat capacity of concrete; is the cumulative heat released by concrete from the start of setting to the j-th time point, and its calculation formula is: Among them, is a function of the degree of development of the heat of hydration of the cement used in the concrete over time, is the maximum potential heat of hydration of the cement used in the concrete; S303. Denote the actual total value of the temperature drop caused by all cooling pipes from the start of concrete setting to the j-th time point as , with the unit of °C, . The calculation formula of In the formula, Initial temperature of concrete, unit: °C; S304. Determine using the least squares method and , and define the objective function as: Among them, represents the total predicted temperature drop caused by all cooling pipes from the start of condensation to the j-th time point, The calculation formula of is: In the formula, is the duration from the start of concrete setting to the j-th time point, with the unit of min; Indicates the initial temperature of the concrete, in °C; Indicates The average water temperature at the inlet of the internal cooling pipe, in °C; Indicates the total average flow rate of the cooling water in all the cooling pipes, in L / min; S305. Minimize the objective function using an optimization algorithm to calculate the optimal and values.
6. A large-volume concrete early temperature prediction system for implementing the large-volume concrete early temperature prediction method as described in any one of claims 1-5, characterized in that, Including: A data acquisition module for obtaining the temperature of the concrete and the cooling water parameters of the concrete cooling pipes; A variable input module for inputting a time period; A cooling pipe parameter calculation module for calculating the value of the temperature drop of the concrete caused by each cooling pipe within the time period; A hydration heat calculation module for calculating the value of the temperature rise caused by the hydration of the concrete within the time period; An early temperature prediction module for predicting the early temperature of the concrete at the end of the time period; A result output and display module for storing and displaying the collected data, the intermediate data during the calculation, and the early temperature prediction result of the concrete.
7. The early temperature prediction system for mass concrete according to claim 6, characterized in that, The data acquisition module includes a concrete temperature acquisition module, a cooling water temperature acquisition module, and a cooling water flow rate acquisition module. The concrete temperature acquisition module includes a surface temperature sensor arranged on the surface of the concrete and an inner layer temperature sensor at different depth positions inside the concrete structure; the cooling water temperature acquisition module includes a cooling water temperature sensor arranged at the inlet of each cooling pipe, and the cooling water flow rate acquisition module includes a flow rate sensor arranged inside each cooling pipe.
8. An electronic device, characterized in that, Including a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor is used to implement the steps of the early temperature prediction method for mass concrete as described in any one of claims 1-5 when executing the computer program.
9. A storage medium, characterized in that, A computer program is stored on a storage medium. When the computer program is executed by a processor, the steps of the early temperature prediction method for mass concrete as described in any one of claims 1-5 are implemented.