Mass concrete temperature control method for concrete bearing platform

Abstract

The invention relates to a mass concrete temperature control method for a concrete bearing platform, which comprises the following steps of: before concrete is poured, cooling sand and gravel materials; cooling water pipes are arranged on the concrete bearing platform in a layered mode; temperature sensors are arranged on the surface and inside the concrete bearing platform; a cooling water intelligent control system and an air energy device are arranged, and the flow and temperature of cooling water are adjusted according to data collected by a temperature sensor. The cooling water intelligent control system specifically comprises a constant-temperature water tank, a water segregator and a control module; the air energy device is connected with the constant-temperature water tank, the water segregator is connected with the constant-temperature water tank, a booster pump is arranged between the constant-temperature water tank and the water segregator, a wireless control valve is arranged on a cooling water pipe of the water segregator, and a pressure release valve is arranged on the water segregator. Compared with the prior art, the internal temperature and the temperature gradient of the concrete can be effectively controlled, the temperature stress is reduced, concrete cracking is avoided, and the engineering quality and the construction efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a mass concrete temperature control method for a concrete cap. Background Art

[0002] During the construction of large-volume concrete, due to its large volume, the internal hydration heat accumulates, which easily leads to a large temperature difference between the interior and the surface of the concrete, thus generating temperature stress. When the temperature stress exceeds the tensile strength of the concrete, it is easy to cause cracks, affecting the integrity and safety of the structure. Therefore, temperature control is a crucial link in the construction of large-volume concrete.

[0003] At present, the temperature control measures for large-volume concrete mainly include lowering the pouring temperature, using cooling water pipe systems, covering with insulation materials, etc. However, traditional temperature control methods have certain limitations in complex construction environments, such as the difficulty in achieving real-time monitoring and dynamic adjustment of temperature changes. In addition, the effect of temperature control often depends on the experience of construction personnel, and the lack of a systematic temperature prediction and regulation mechanism can easily lead to improper temperature control and increase the risk of cracks.

[0004] Especially in the construction of concrete caps, temperature control is more difficult because the caps are usually large and have complex structural shapes. The traditional cooling water pipe layout method is difficult to adapt to the geometric characteristics of the cap. At the same time, due to changes in ambient temperature, the temperature of the cooling water is difficult to maintain stable, further exacerbating the complexity of temperature control.

[0005] In order to overcome the above problems, it is necessary to develop a more intelligent temperature control system. By combining real-time monitoring, temperature prediction and dynamic control technology, the temperature control effect of concrete foundation construction can be comprehensively improved, the occurrence of temperature cracks can be reduced, and the safety and durability of concrete structures can be ensured. Summary of the invention

[0006] The purpose of the present invention is to provide a method for controlling the temperature of a large volume of concrete for a concrete cap in order to overcome the defect of the prior art that it is difficult to effectively control the temperature of the concrete cap.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A method for controlling the temperature of a large volume of concrete for a concrete cap comprises the following steps:

[0009] S1: Before pouring concrete, cool the sand and gravel;

[0010] S2: Cooling water pipes are laid out in layers on the concrete cap; the horizontal pipe spacing of each layer of cooling water pipes is 90-100cm, and the vertical pipe spacing is 90-110cm;

[0011] S3: Temperature sensors are arranged on the surface and inside of the concrete cap to collect the temperature distribution on the surface and inside of the concrete cap;

[0012] S4: Set up a cooling water intelligent control system and an air energy device to adjust the flow and temperature of the cooling water according to the data collected by the temperature sensor to ensure the stability of the internal and surface temperature of the concrete;

[0013] The cooling water intelligent control system specifically includes a constant temperature water tank, a water distributor and a control module; the air energy device is connected to the constant temperature water tank for adjusting the cooling water temperature; the water distributor is connected to the constant temperature water tank, and a booster pump is provided between the constant temperature water tank and the water distributor; a wireless control valve is provided on the cooling water pipe of the water distributor, and a pressure relief valve is provided on the water distributor; the control module is connected to a temperature sensor for receiving information feedback from the temperature sensor; the water distributor, the booster pump, the wireless control valve and the pressure relief valve are all connected to the control module signal and are controlled by it.

[0014] Furthermore, in step S1, the specific steps of the cooling treatment are: using a cold storage room and a cold spray system, and using an air energy device to control the temperature of a constant temperature water tank to ensure that the temperature of the sand and gravel is controlled below 28°C before entering the concrete mixer.

[0015] Furthermore, in step S2, the cooling water pipe is kept at a distance of at least 50 cm from the concrete surface.

[0016] Furthermore, in step S2, the cooling water pipe is made of iron pipe and is sealed by a threaded sleeve and raw tape.

[0017] Furthermore, in step S3, the temperature sensors are arranged in a 1 / 4 area of ​​the concrete cap and are evenly distributed in the horizontal and vertical directions.

[0018] Furthermore, the temperature sensors all include a wireless communication module for transmitting the collected temperature information to a control module of the cooling water intelligent control system.

[0019] Furthermore, in step S4, the internal temperature of the concrete foundation is controlled not to exceed 65°C, the internal and external temperature difference is not more than 25°C, and the cooling rate is controlled not to exceed 3.0°C / d within 7 days and not to exceed 2.0°C / d after 7 days.

[0020] Furthermore, the cooling water intelligent control system also includes a temperature prediction subsystem and an intelligent cloud monitoring subsystem.

[0021] Furthermore, the temperature prediction subsystem is used for real-time collection of temperature data inside and outside the concrete and historical data analysis, and for predicting future temperature change trends of the concrete.

[0022] Furthermore, the intelligent cloud monitoring subsystem collects and analyzes the temperature data of concrete in real time, and displays and warns in conjunction with the temperature prediction subsystem.

[0023] Furthermore, the temperature prediction subsystem uses a deep learning network and a long short-term memory network to analyze and predict the temperature change trend of concrete.

[0024] Furthermore, the intelligent cloud monitoring subsystem collects concrete temperature data collected by temperature sensors in real time through a wireless network, analyzes and processes the data in the cloud, and generates a temperature change curve and an early warning report.

[0025] Furthermore, the cooling water intelligent control system includes a temperature control alarm module. When the temperature collected by the temperature sensor or the temperature predicted by the temperature prediction subsystem exceeds a set threshold, the temperature control alarm module automatically sounds an alarm and adjusts the cooling water pipe flow.

[0026] Furthermore, after the concrete pouring is completed, the cooling water circulation is stopped and the cooling water pipe is grout-sealed.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention realizes precise control of the temperature of the concrete foundation through the combination of the cooling water intelligent control system and the air energy device. The cooling water temperature can be adjusted in real time during the concrete pouring process, avoiding the crack problem caused by improper temperature control in the traditional method, thereby improving the construction quality and durability of the structure.

[0029] (2) The present invention introduces a temperature prediction system and a deep learning model, which can predict the temperature change trend of concrete in advance and optimize the temperature control strategy based on the prediction results. Compared with the traditional passive control method, the present invention can actively prevent temperature anomalies, significantly improve the accuracy and efficiency of temperature control, and reduce the temperature stress problems that may occur during the construction process.

[0030] (3) The present invention uses a large-volume concrete temperature control intelligent cloud monitoring system, and the temperature control data can be stored, analyzed and remotely monitored in real time on the cloud, which greatly facilitates construction management and data analysis. Compared with traditional on-site monitoring methods, the present invention greatly improves the speed and accuracy of data processing, reduces the necessity of manual intervention, reduces errors caused by environmental and human factors, and ensures the efficiency and safety of the construction process.

[0031] (4) The temperature control method of the present invention can effectively control the internal temperature and temperature gradient of concrete, reduce temperature stress, avoid concrete cracking, improve project quality and construction efficiency, and effectively improve the intelligent level of temperature control of large-volume concrete, which has important reference value for practical engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the concrete cap circulation cooling system of the present invention.

[0033] Figure 2 It is a schematic diagram of the layout of the temperature sensor of the present invention.

[0034] Description of the markings in the figure:

[0035] 1- air energy device, 2- temperature sensor, 3- constant temperature water tank, 4- water distributor, 5- booster pump, 6- wireless control valve, 7- pressure relief valve. DETAILED DESCRIPTION

[0036] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments. The component models, material names, connection structures, control methods, algorithms and other features that are not clearly described in this technical solution are regarded as common technical features disclosed in the prior art.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] Embodiment 1:

[0039] This embodiment provides a method for controlling the temperature of a large volume of concrete for a concrete cap, comprising the following steps:

[0040] S1: Before pouring concrete, cool the sand and gravel;

[0041] S2: Cooling water pipes are laid out in layers on the concrete cap; the horizontal pipe spacing of each layer of cooling water pipes is 90-100cm, and the vertical pipe spacing is 90-110cm;

[0042] S3: Temperature sensors 2 are arranged on the surface and inside of the concrete cap to collect the temperature distribution on the surface and inside of the concrete cap;

[0043] S4: Set up a cooling water intelligent control system and an air energy device 1, and adjust the flow and temperature of the cooling water according to the data collected by the temperature sensor 2 to ensure the stability of the internal and surface temperature of the concrete.

[0044] The cooling water intelligent control system of this embodiment specifically includes a constant temperature water tank 3, a water distributor 4 and a control module. The air energy device 1 is connected to the constant temperature water tank 3 for adjusting the cooling water temperature; the water distributor 4 is connected to the constant temperature water tank 3, and a booster pump 5 is provided between the constant temperature water tank 3 and the water distributor 4; a wireless control valve 6 is provided on the cooling water pipe of the water distributor 4, and a pressure relief valve 7 is provided on the water distributor 4; the control module is connected to the temperature sensor 2 for receiving information feedback from the temperature sensor 2; the air energy device 1, the water distributor 4, the booster pump 5, the wireless control valve 6 and the pressure relief valve 7 are all connected to the control module signal and are controlled by it. Figure 1 As shown, the air energy device 1, temperature sensor 2, constant temperature water tank 3, water distributor 4, booster pump 5, wireless control valve 6 and pressure relief valve 7 of this embodiment together constitute a concrete cap circulation cooling system.

[0045] This embodiment realizes precise control of the temperature of the concrete foundation through the combination of the cooling water intelligent control system and the air energy device 1, and can adjust the cooling water temperature in real time during the concrete pouring process, avoiding the crack problem caused by improper temperature control in the traditional method, thereby improving the construction quality and durability of the structure.

[0046] Embodiment 2:

[0047] This embodiment provides a mass concrete temperature control method for a concrete cap. The difference from Embodiment 1 is that the cooling water intelligent control system of this embodiment further includes a temperature prediction subsystem and an intelligent cloud monitoring subsystem.

[0048] The temperature prediction subsystem of this embodiment is used to collect real-time data of the temperature of the concrete and the external environment, analyze historical data, and predict the future temperature change trend of the concrete. The temperature prediction subsystem uses a deep learning network and a long short-term memory network to analyze and predict the temperature change trend of the concrete.

[0049] The intelligent cloud monitoring subsystem of this embodiment collects and analyzes concrete temperature data in real time, and displays and warns in combination with the temperature prediction subsystem. The intelligent cloud monitoring subsystem collects concrete temperature data collected by the temperature sensor 2 in real time through a wireless network, analyzes and processes it in the cloud, and generates a temperature change curve and an early warning report.

[0050] In addition, the cooling water intelligent control system of this embodiment includes a temperature control alarm module. When the temperature collected by the temperature sensor 2 or the temperature predicted by the temperature prediction subsystem exceeds a set threshold, the temperature control alarm module automatically sounds an alarm and adjusts the cooling water pipe flow.

[0051] This embodiment introduces a temperature prediction system and a deep learning model, which can predict the temperature change trend of concrete in advance and optimize the temperature control strategy based on the prediction results. Through the intelligent cloud monitoring system for large-volume concrete temperature control, temperature control data can be stored, analyzed and remotely monitored in real time on the cloud, greatly facilitating construction management and data analysis.

[0052] Embodiment 3:

[0053] This embodiment provides a method for controlling the temperature of a large volume of concrete for a concrete cap, which specifically includes the following steps:

[0054] (1) Material cooling treatment

[0055] Before pouring concrete, the sand and gravel in the mixing station silo are cooled. Specifically, a cold storage room and a cold spray system are used, and the air energy device 1 is used to control the temperature of the constant temperature water tank 3 to ensure that the temperature of the sand and gravel is controlled below 28°C before entering the concrete mixer. The implementation time of the cooling measures should be flexibly adjusted according to the weather and construction environment to achieve the best cooling effect. After the concrete pouring is completed, the cooling water circulation is stopped, and the cooling water pipe is grouting and plugged to prevent the long-term temperature effect caused by residual moisture in the concrete.

[0056] (2) Layout of cooling water pipes

[0057] During the concrete pouring process, the cooling water pipes are arranged in layers on the foundation according to the design requirements. The horizontal spacing of the first layer of cooling water pipes is set to 90-100cm, and the vertical pipe spacing is set to 100cm. The cooling water pipes are kept at least 50cm away from the concrete surface to avoid excessive local cooling. The cooling water pipes are made of iron pipes with high thermal conductivity and are sealed with threaded sleeves and raw tape to ensure the tightness and sealing of the connection.

[0058] (3) Layout of temperature sensor 2

[0059] The arrangement of the temperature sensor 2 specifically includes the following steps:

[0060] 3.1 Sensor arrangement in the coordinate system

[0061] like Figure 1 As shown, in this embodiment, the concrete cap is regarded as a two-dimensional coordinate system, and the temperature sensor 2 is arranged on the positive half axis of the xy axis. Specifically, the temperature sensor 2 is evenly distributed along the positive x-axis and the positive y-axis to monitor the temperature changes inside and on the surface of the concrete. This arrangement only uses 1 / 4 of the cap area for temperature monitoring, which minimizes the number of temperature sensors 2 used. At the same time, due to the symmetry of the cap structure, this arrangement can still provide comprehensive and accurate temperature monitoring data.

[0062] 3.2 Integration of sensors and cooling water pipes

[0063] There is a precise spacing between the temperature sensor 2 and the cooling water pipe to ensure that the monitored temperature data can reflect the cooling effect of the water pipe. The temperature sensor 2 is arranged at a certain distance from the cooling water pipe to avoid the local temperature being too low or too high affecting the accuracy of the overall data. This arrangement allows the temperature sensor 2 to not only monitor the overall temperature distribution of the concrete, but also effectively monitor the effect of cooling water on the temperature of the concrete. The arrangement of the temperature sensor 2 and the cooling water pipe is shown in Figure 1. Figure 1 shown.

[0064] 3.3 Integration of wireless communication module

[0065] All temperature sensors 2 are integrated with wireless communication modules to transmit data to the central control system in real time. Each temperature sensor 2 can work independently and maintain communication with the central system through a wireless network to ensure the stability and real-time performance of data transmission. The temperature sensor 2 network forms a closed-loop system to ensure that any abnormal data from any temperature sensor 2 can be immediately fed back to the control system for processing.

[0066] (4) Application of cooling water intelligent control system

[0067] The application of cooling water intelligent control system specifically includes the following steps:

[0068] 4.1 Installation and adjustment of wireless control valve 6

[0069] like Figure 2 As shown, the cooling water intelligent control system realizes automatic adjustment of the cooling water pipeline through the coordinated action of the wireless control valve 6, the booster pump 5, the water distributor 4 and the pressure relief valve 7. The wireless control valve 6, the booster pump 5, the water distributor 4 and the pressure relief valve 7 of this embodiment can be set in multiple groups according to actual conditions. The wireless control valve 6 is installed at a key position of the cooling water pipeline and is responsible for accurately controlling the flow rate of the cooling water. The booster pump 5 is used to increase the water flow pressure when necessary to ensure that the cooling water can be effectively transported to all areas where the cooling water pipes are arranged. The water distributor 4 is used to evenly distribute the cooling water to different cooling water pipelines. The pressure relief valve 7 is used to release excess pressure to prevent the system from failing due to excessive pressure in the pipeline. Through the coordinated work of these devices, the system can dynamically adjust the flow rate and pressure of the cooling water according to the data fed back by the temperature sensor 2 to ensure a smooth temperature change.

[0070] 4.2 Temperature monitoring and feedback mechanism

[0071] like Figure 2As shown, during the pouring and solidification of concrete, the temperature sensor 2 monitors the temperature inside and on the surface of the concrete in real time and transmits the data to the intelligent control system. The constant temperature water tank 3 is connected to the air energy device 1 and is responsible for adjusting the temperature of the cooling water to ensure that the temperature of the cooling water entering the pipeline is always maintained within the set range. The system determines whether the cooling water flow needs to be adjusted based on the temperature data fed back by the temperature sensor 2, and increases the flow through the booster pump 5 or reduces the pressure through the pressure relief valve 7 to ensure that the water flow pressure is within the appropriate range. If the temperature change in a certain area exceeds the preset threshold, the system will automatically adjust the cooling water flow in the area through the wireless control valve 6 and the water distributor 4 to ensure the overall temperature balance.

[0072] 4.3 Intelligent response and automatic adjustment

[0073] The system dynamically adjusts the flow and temperature of cooling water according to the temperature data fed back in real time by the temperature sensor 2 through an intelligent response mechanism. In particular, during the cooling stage, the system adjusts the cooling water temperature through the constant temperature water tank 3 and the air energy device 1, and gradually adjusts the water flow using the booster pump 5 and the water distributor 4 to ensure that the temperature is gradually reduced to avoid excessive temperature stress caused by a sudden drop in temperature. The pressure relief valve 7 releases excess pressure when necessary to prevent the system pressure from being too high.

[0074] (5) Introduction of temperature prediction subsystem and intelligent response mechanism

[0075] The introduction of the temperature prediction subsystem and the intelligent response mechanism include the following steps:

[0076] 5.1 Introduction of temperature prediction subsystem

[0077] The temperature prediction subsystem is introduced to predict the future temperature trend of concrete by real-time collection of internal and external environmental temperature data of concrete and analysis of historical data, and using deep learning models such as LSTM or Transformer. The system combines real-time data with historical data to generate a future temperature change curve, providing a reference for the cooling water intelligent control system.

[0078] 5.2 Early warning and early adjustment

[0079] Based on the prediction results of the temperature prediction subsystem, when it is predicted that the temperature of a certain area will exceed the set threshold in the future, the system will trigger the early warning mechanism in advance and recommend or automatically adjust the operating parameters of the cooling water system. Through the wireless control valve 6, the system can gradually adjust the flow and temperature of the cooling water to ensure that the temperature change is within the controllable range and prevent concrete cracking caused by temperature stress concentration.

[0080] 5.3 Intelligent response and automated adjustment

[0081] Combining temperature prediction and real-time monitoring data, the system can proactively intervene before the temperature change trend reaches a dangerous threshold. The intelligent response mechanism adjusts the flow and temperature of the cooling water. Especially in the cooling stage, the system will gradually adjust the flow of cooling water according to the predicted temperature to ensure a smooth temperature transition and avoid temperature stress problems caused by sudden cooling. This mechanism greatly optimizes the stability and safety of the concrete temperature control process.

[0082] (6) Application of Intelligent Cloud Monitoring Subsystem

[0083] The intelligent cloud monitoring subsystem collects and analyzes concrete temperature data in real time by connecting the temperature sensor 2 nodes and the wireless control valve 6 via a wireless network. Combined with the data from the temperature prediction subsystem, the intelligent cloud monitoring subsystem can generate detailed temperature trend charts and early warning reports for construction managers to view remotely and make real-time decisions. At the same time, the system records all operations and adjustment processes to support subsequent construction analysis and optimization.

[0084] The intelligent cloud monitoring subsystem for mass concrete temperature control connects each temperature sensor 2 node through a wireless network and uploads the monitoring data to the cloud platform. The platform stores, analyzes and processes the data, and generates real-time temperature change curves and early warning reports. Managers can remotely view monitoring data and optimize control strategies through mobile devices or computer terminals, thereby realizing remote management and intelligent control of the construction site.

[0085] (7) Integration and optimization of air energy device 1

[0086] 7.1 Installation of air energy device 1

[0087] An air energy device 1 is installed outside the constant temperature water tank 3 to control the temperature of the cooling water in the water tank. The air energy device 1 can automatically adjust the water temperature in the water tank according to the real-time temperature demand to ensure that the temperature of the cooling water is always maintained within the set range. The device can further optimize the internal temperature of the concrete by linkage with the intelligent control system.

[0088] 7.2 Automation of temperature regulation

[0089] The air energy device 1 is connected to the intelligent control system, and automatically adjusts the water temperature of the constant temperature water tank 3 through the data of the temperature sensor 2 received by the system and the analysis results of the prediction model. According to the temperature requirements at different stages, the air energy device 1 can quickly heat or cool the water in the water tank to ensure that the temperature of the cooling water is appropriate when it enters the pipeline, thereby optimizing the temperature control effect inside the concrete.

[0090] 7.3 Improvement of temperature stability

[0091] By regulating the constant temperature water tank 3 through the air energy device 1, the system can maintain the temperature stability of the cooling water under various external conditions. Whether it is high temperature in summer or low temperature in winter, the air energy device 1 can ensure that the inlet temperature of the cooling water is within the most suitable range, further reducing temperature stress and improving the quality and safety of concrete construction. Through the above-mentioned implementation, the present invention realizes the intelligent control and prediction of the temperature of the concrete foundation, reduces the damage of temperature stress to the concrete structure, and significantly improves the quality and safety of large-volume concrete construction.

[0092] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A method for controlling the temperature of a large volume of concrete for a concrete cap, characterized in that: The following steps are involved: S1: Before pouring concrete, cool the sand and gravel; S2: Cooling water pipes are laid out in layers on the concrete cap; the horizontal pipe spacing of each layer of cooling water pipes is 90-100cm, and the vertical pipe spacing is 90-110cm; S3: Temperature sensors are arranged on the surface and inside of the concrete cap to collect the temperature distribution on the surface and inside of the concrete cap; S4: Set up a cooling water intelligent control system and an air energy device to adjust the flow and temperature of the cooling water according to the data collected by the temperature sensor to ensure the stability of the internal and surface temperature of the concrete; The cooling water intelligent control system specifically includes a constant temperature water tank, a water distributor and a control module; the air energy device is connected to the constant temperature water tank for adjusting the cooling water temperature; the water distributor is connected to the constant temperature water tank, and a booster pump is provided between the constant temperature water tank and the water distributor; a wireless control valve is provided on the cooling water pipe of the water distributor, and a pressure relief valve is provided on the water distributor; the control module is connected to a temperature sensor for receiving information feedback from the temperature sensor; the water distributor, the booster pump, the wireless control valve and the pressure relief valve are all connected to the control module signal and are controlled by it.

2. A method for controlling the temperature of a large volume concrete used for a concrete cap according to claim 1, characterized in that: In step S1, the specific steps of the cooling treatment are: using a cold storage room and a cold spray system, and using an air energy device to control the temperature of a constant temperature water tank to ensure that the temperature of the sand and gravel is controlled below 28°C before entering the concrete mixer.

3. A method for controlling the temperature of a large volume concrete used for a concrete cap according to claim 1, characterized in that: In step S2, the cooling water pipe is kept at a distance of at least 50 cm from the concrete surface; The cooling water pipe is made of iron pipe and is sealed by threaded sleeve and raw tape.

4. A method for controlling the temperature of a large volume concrete used for a concrete cap according to claim 1, characterized in that: In step S3, the temperature sensors are arranged in the 1 / 4 area of ​​the concrete cap and are evenly distributed in the horizontal and vertical directions; The temperature sensors all include a wireless communication module for transmitting the collected temperature information to a control module of the cooling water intelligent control system.

5. The method for controlling the temperature of a large volume concrete used for a concrete cap according to claim 1, characterized in that: In step S4, the internal temperature of the concrete foundation is controlled to be no more than 65°C, the temperature difference between the inner and outer surfaces is no more than 25°C, and the cooling rate is controlled to be no more than 3.0°C / d within 7 days and no more than 2.0°C / d after 7 days.

6. A method for controlling the temperature of a large volume concrete used for a concrete cap according to claim 1, characterized in that: The cooling water intelligent control system also includes a temperature prediction subsystem and an intelligent cloud monitoring subsystem; The temperature prediction subsystem is used to collect real-time data of the temperature inside and outside the concrete environment and analyze historical data, and predict the future temperature change trend of the concrete; The intelligent cloud monitoring subsystem collects and analyzes concrete temperature data in real time, and displays and warns in conjunction with the temperature prediction subsystem.

7. A method for controlling the temperature of a large volume concrete used for a concrete cap according to claim 6, characterized in that: The temperature prediction subsystem uses a deep learning network and a long short-term memory network to analyze and predict the temperature change trend of concrete.

8. A method for controlling the temperature of a large volume concrete used for a concrete cap according to claim 6, characterized in that: The intelligent cloud monitoring subsystem collects concrete temperature data collected by temperature sensors in real time through wireless networks, analyzes and processes it in the cloud, and generates temperature change curves and early warning reports.

9. A method for controlling temperature of mass concrete for a concrete cap according to claim 6, characterized in that: The cooling water intelligent control system includes a temperature control alarm module. When the temperature collected by the temperature sensor or the temperature predicted by the temperature prediction subsystem exceeds a set threshold, the temperature control alarm module automatically sounds an alarm and adjusts the cooling water pipe flow.

10. A method for controlling temperature of mass concrete for a concrete cap according to claim 1, characterized in that: After the concrete pouring is completed, the cooling water circulation is stopped and the cooling water pipes are grout-sealed.

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