Concrete hydration heat control method and control system

Abstract

The invention belongs to the technical field of building construction, and discloses a concrete hydration heat control method and system, and the concrete hydration heat control method comprises the following steps: carrying out finite element simulation calculation according to a water pipe arrangement scheme; determining a measuring point arrangement scheme and theoretical water inlet flow; calculating the theoretical temperature change rate of each measuring point; pre-burying a water pipe and a temperature measuring piece in the concrete member according to the water pipe arrangement scheme and the measuring point arrangement scheme; cooling water is introduced into the water pipe according to the theoretical water inlet flow, and the actual temperature change rate of the reference measuring point within the time t is obtained; and comparing the actual temperature change rate of the reference measuring point with the theoretical temperature change rate, and adjusting the water inlet flow to make the actual temperature change rate not greater than the theoretical temperature change rate. According to the concrete hydration heat control method, the hydration heat temperature control precision is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a concrete hydration heat control method and control system. Background Art

[0002] In the fields of bridge, water conservancy, hydropower and other engineering construction, large-volume concrete construction is often encountered. According to the different sizes of building components, the mixed concrete slurry is poured into the pre-set concrete formwork. After it hardens, it becomes a concrete component. However, ordinary silicate cement will generate a large amount of heat due to the chemical reaction with water, which is usually called "hydration heat". The generation of hydration heat has a huge impact on the quality of concrete components, especially when the volume of concrete components is large. Due to the difference in heat dissipation between the inside and surface of the concrete, temperature secondary stress is generated. When the temperature difference between the inside and outside of the concrete is particularly large, the large temperature secondary stress may cause cracking of the concrete component, which in turn leads to durability and safety risks during the operation of the concrete component.

[0003] In order to avoid cracking of concrete components, the current method of cooling the interior of concrete components is mainly to bury cooling water pipes inside the concrete components and circulate cooling water into the cooling water pipes. With the development of information control technologies such as automation, Internet of Things and artificial intelligence, water cooling has gradually changed from traditional manual methods to digital and intelligent methods. The traditional mode of relying on manual on-site temperature measurement and flow adjustment has been transformed into a mode based on real-time online perception, analysis and closed-loop control of concrete temperature based on intelligent systems. However, the current intelligent water system uses the pre-set temperature threshold range and temperature change rate threshold range as the control judgment standard, which has a certain lag and is prone to the problem of untimely cooling. Summary of the invention

[0004] The purpose of the present invention is to provide a concrete hydration heat control method and control system to solve the problem of untimely cooling.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The method for controlling the hydration heat of concrete comprises the following steps:

[0007] Conduct finite element simulation calculations based on the water pipe layout plan;

[0008] Determine the measurement point layout and theoretical water inflow rate;

[0009] Determine the frequency and flow characteristics of the pump that delivers water into the concrete element;

[0010] Obtaining a curve of temperature and time at the measuring point and calculating a theoretical temperature change rate;

[0011] Pre-embed water pipes and temperature measuring components in the concrete component according to the water pipe arrangement plan and the measuring point arrangement plan;

[0012] Cooling water is introduced into the water pipe according to the theoretical water inlet flow rate, the actual temperature change rate of the reference measuring point within time t is obtained, the actual temperature change rate of the reference measuring point is compared with the theoretical temperature change rate, and the actual temperature change rate is adjusted to be no greater than the theoretical temperature change rate.

[0013] Optionally, the theoretical water inlet flow rate is determined based on preset external environmental conditions, a preset water inlet temperature, a preset temperature drop rate threshold, and a preset concrete surface and interior temperature difference threshold.

[0014] Optionally, the reference measuring point is a measuring point where the highest temperature occurs within the time t.

[0015] Optionally, when acquiring the reference measuring point, the theoretical temperature gradient difference between any two adjacent measuring points in the same direction is determined, the allowable range of the temperature gradient difference is determined based on the theoretical temperature gradient difference, and it is judged whether the actual temperature gradient difference between the corresponding two measuring points is within a preset allowable range of the temperature gradient difference, and the measuring point data that is not within the preset allowable range of the temperature gradient difference is removed.

[0016] Optionally, the concrete hydration heat control method further includes evaluating the reference measuring point temperature value at the next time node based on the theoretical temperature change rate and the current node temperature of the reference measuring point, and increasing the water inlet flow rate if the reference measuring point temperature value at the next time node is greater than a set critical temperature.

[0017] Optionally, when cooling water is introduced into the water pipe, the actual water inlet temperature is adjusted so that the actual water inlet temperature is consistent with a preset water inlet temperature.

[0018] A control system for executing the above-mentioned concrete hydration heat control method, the control system comprising a cooling water supply module, a water temperature regulating module and a cooling module connected in sequence, the cooling module comprising a plurality of water pipes and a first temperature sensor, the water pipes and the first temperature sensor being pre-buried in the concrete component according to the water pipe arrangement scheme and the measuring point arrangement scheme; the water temperature regulating module connecting the cooling module and the cooling water supply module, the cooling water supply module comprising a first water pump, a second water pump, a storage water tank, a second temperature sensor and a third temperature sensor, the first water pump connecting the storage water tank and the water temperature regulating module, the second temperature sensor being arranged in the storage water tank, the second water pump connecting an external water source and the water temperature regulating module, the third temperature sensor being used to monitor the temperature of the external water source; the control system further comprising a control module, the control module being communicatively connected with the cooling water supply module, the water temperature regulating module and the cooling module.

[0019] Optionally, the water temperature regulation module includes a constant temperature water tank, a spray pipe, a heating element and a fourth temperature sensor. The constant temperature water tank is open, the heating element is arranged in the constant temperature water tank, the first water pump supplies cooling water to the constant temperature water tank through a plurality of the spray pipes, the second water pump is connected to the constant temperature water tank through a connecting pipe, and the fourth temperature sensor is arranged at the outlet of the constant temperature water tank.

[0020] Optionally, a three-way valve is connected between the storage water tank and the water temperature adjustment module, and a turbidity meter is also provided in the storage water tank.

[0021] Optionally, the control system further comprises a flow distribution module, wherein the flow distribution module is connected to the cooling module and the water temperature regulating module, and the flow distribution module is configured to distribute cooling water to each of the water pipes in the cooling module.

[0022] Beneficial effects of the present invention: The concrete hydration heat control method and control system proposed in the present invention control hydration heat by combining on-site temperature monitoring feedback with finite element analysis data, and introduces active pre-control technology, which can not only respond to real-time temperature changes, but also foresee possible temperature change trends in the future and adjust control parameters in advance, thereby significantly improving the accuracy of hydration heat temperature control, making temperature regulation more accurate and reliable, and effectively preventing the adverse effects of temperature fluctuations, realizing more intelligent and efficient temperature management, and providing a solid technical guarantee for the application of large-volume concrete engineering in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart of a method for controlling concrete hydration heat in an embodiment of the present invention;

[0024] Figure 2Schematic diagram of the structure of the control system in the embodiment of the present invention.

[0025] In the figure:

[0026] 1. First temperature sensor; 2. First water pump; 3. Storage water tank; 4. Second water pump; 5. Second temperature sensor; 6. Third temperature sensor; 7. Turbidimeter; 8. Liquid level sensor; 9. Drain valve; 10. Water change valve; 11. First flow meter; 12. Second flow meter; 13. Constant temperature water tank; 14. Fourth temperature sensor; 15. Diverter; 16. First regulating valve; 17. Third flow meter; 18. Controller; 19. Cloud; 20. Third water pump; 21. Frequency converter; 22. Three-way valve; 23. Second regulating valve;

[0027] 100. Concrete components. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] In an embodiment of the present invention, a concrete hydration heat control method is proposed, which can effectively control the temperature difference between the inside and outside of the concrete component 100 by adjusting the cooling water flow rate entering the interior of the concrete component 100, thereby effectively preventing the concrete component 100 from cracking. The concrete hydration heat control method mainly includes the following steps:

[0033] S1. Perform finite element simulation calculation according to the water pipe layout plan;

[0034] The water pipe arrangement scheme can be specifically determined based on the inherent parameters of the concrete component 100, such as volume, material specific heat capacity, etc., as well as previous experience or construction schemes.

[0035] S2. Determine the measurement point arrangement plan and the cooling water flow rate (hereinafter referred to as theoretical water flow rate) introduced into the concrete component 100 according to the finite element simulation calculation results.

[0036] When performing finite element simulation calculations to obtain the theoretical water inlet flow rate, it is necessary to determine it based on preset external environmental conditions such as air temperature, wind speed and direction, preset water inlet temperature, preset cooling rate threshold, and preset temperature difference threshold between the surface and inside of concrete components; the preset cooling rate threshold and the preset temperature difference threshold between the surface and inside of concrete components are determined according to the cooling rate and temperature difference between the surface and inside of concrete specified in the "Standards for Construction of Large Volume Concrete"; and the preset water inlet temperature is based on the water source temperature in the external environment.

[0037] Among them, the cooling rate should not be greater than 2℃ / d, and should not be greater than 1℃ / 4h, and the temperature difference between the inside and outside of the concrete should meet the following requirements: when the thickness of the mass concrete is less than 1.5m, the temperature difference between the inside and outside is not greater than 20℃; when the thickness of the mass concrete is in the range of [1.5, 2.5], the temperature difference between the inside and outside is not greater than 25℃; when the thickness of the mass concrete is greater than 2.5m, the temperature difference between the inside and outside is not greater than 28℃.

[0038] The arrangement of the measuring point positions needs to be able to reflect the evolution law of the temperature rise and drop of the concrete component 100, and is arranged according to the internal temperature gradient of the concrete component 100 and the influence range of the water pipe temperature during the finite element simulation calculation process.

[0039] S3. Select a water pump model for pumping cooling water according to the theoretical water inlet flow rate and the current volume of the concrete component 100, and obtain the frequency and pump flow characteristic curve of the inverter 21 used by the water pump.

[0040] There is a corresponding relationship between the frequency of the inverter 21 and the motor speed of the water pump, and its mathematical model is expressed as follows:

[0041] n0=60f / p

[0042] n=60f(1-s) / p

[0043] s=(n0-n) / n0

[0044] In the formula: f is the frequency of the inverter, in Hertz (Hz); p is the number of motor pole pairs, for example, p = 2 for a four-pole motor; n0 is the synchronous speed of the motor; n is the actual speed of the motor; s is the slip rate. Therefore, the frequency of the inverter is linearly related to the speed of the motor;

[0045] There is also a corresponding relationship between the power, flow rate, head and motor speed of the water pump, and its mathematical model is expressed as follows:

[0046] Shaft power proportionality law:

[0047] Head Proportional Law:

[0048] Flow Proportional Law:

[0049] Where: P i (including P1 and P2) is the shaft power of the pump; H i (including H1 and H2) is the pump head, Q i (including Q1 and Q2) is the pump flow rate. Pump flow rate Q i The pump head H is proportional to the square of the speed n, and the pump output power Pu (Pu=P i* η) is proportional to the cube of the speed n. Since the frequency f of the frequency converter is proportional to the speed n, it can be seen that the relationship between power, flow, head and frequency is equivalent to their relationship with the speed.

[0050] In fact, due to the existence of pipe resistance (uncertain value), at the preset frequency, the actual flow rate is less than the theoretical flow rate, that is, the characteristic curve of frequency and flow rate is not a straight line, but a curve. When the speed (frequency) of the water pump changes, its characteristic curve will also change accordingly, thereby affecting the flow rate and head of the water pump. Therefore, after selecting the model of the water pump, it is also necessary to obtain the characteristic curve of frequency and pump flow rate based on experiments.

[0051] S4. Extract the finite element simulation calculation results, derive the temperature and time curves of the measuring points, and calculate the theoretical temperature change rate (temperature change value / temperature change time) of the measuring points.

[0052] S5. Pre-embed water pipes and temperature measuring components in the concrete component 100 according to the water pipe arrangement scheme and the measuring point arrangement scheme. At a preset water inlet temperature, adjust the water pump flow rate, introduce cooling water into the water pipe according to the theoretical water inlet flow rate, and obtain the actual temperature change rate ((current measured temperature value-previous measured temperature value) / time) of the reference measuring point within time t (e.g., one hour);

[0053] S6. Compare the actual temperature change rate of the reference measuring point with the theoretical temperature change rate according to the time series, and adjust the actual water inlet flow rate so that the actual temperature change rate is not greater than the theoretical temperature change rate.

[0054] Specifically, if the actual temperature change rate is not greater than the theoretical temperature change rate, cooling water will continue to be introduced into the water pipe according to the theoretical water inlet flow rate; if the actual temperature change rate exceeds the theoretical temperature change rate during the temperature increase stage, that is, the temperature increases too quickly, the actual water inlet flow rate will be increased by adjusting the water pump frequency to keep the actual temperature change rate consistent with the theoretical temperature change rate; if the actual temperature change rate exceeds the theoretical temperature change rate during the temperature decrease stage, that is, the temperature decreases too quickly, the actual water inlet flow rate will be reduced by adjusting the water pump frequency. More specifically, the frequency of the water pump is adjusted using PID control, and the flow rate is adjusted according to the difference between the current actual temperature change rate and the theoretical temperature change rate. It can be understood that the initial frequency of the water pump is the same as the frequency corresponding to the theoretical water inlet flow rate.

[0055] In this embodiment, the reference measuring point is the measuring point where the highest temperature appears within time t. When obtaining the actual temperature change rate of the reference measuring point, it is also necessary to remove the abnormal value: first determine the theoretical temperature gradient difference between any two adjacent measuring points in the same direction, obtain the allowable range of the temperature gradient difference based on the above theoretical temperature gradient difference, and judge whether the actual temperature gradient difference measured by the temperature measuring parts of the above two measuring points is within the allowable range of the temperature gradient difference. If so, it means that the measuring point data is normal, otherwise it means that the measuring point data is abnormal. In this embodiment, fluctuations within 5% above and below the theoretical temperature gradient difference are all within the allowable range of the temperature gradient difference.

[0056] In addition to adjusting the flow rate according to the actual temperature change rate and the theoretical temperature change rate, when introducing cooling water into the water pipe, it is also necessary to evaluate the reference measurement point temperature value of the next time node based on the theoretical temperature change rate and the current node temperature of the reference measurement point. If the reference measurement point temperature value of the next time node is greater than the set critical temperature, it is also necessary to adjust the frequency and increase the water inlet flow. If it increases to the maximum flow critical value, an early warning will be issued and it will be manually determined whether to overclock.

[0057] When cooling water is introduced into the concrete component 100 , the actual water inlet temperature needs to be adjusted so that the actual water inlet temperature is consistent with the preset water inlet temperature.

[0058] The above concrete hydration heat control method introduces cooling water into the concrete component 100 according to the theoretical water inlet flow rate obtained by finite element simulation calculation. When the actual temperature change rate of the reference measuring point is not greater than the theoretical temperature change rate, it is only necessary to introduce cooling water into the concrete component 100 according to the theoretical water inlet flow rate. When the actual temperature change rate of the reference measuring point is greater than the theoretical temperature change rate, the actual temperature change rate is adjusted by increasing the actual water inlet flow rate, so that the actual temperature change efficiency is reduced. By combining the on-site temperature monitoring feedback with the finite element analysis data for hydration heat control and introducing active pre-control technology, it can not only respond to real-time temperature changes, but also foresee possible future temperature change trends, adjust the actual water inlet flow rate in advance, significantly improve the accuracy of hydration heat temperature control, make temperature regulation more accurate and reliable, and effectively prevent the adverse effects of temperature fluctuations, realize more intelligent and efficient temperature management, and provide a solid technical guarantee for the application of large-volume concrete engineering in complex environments.

[0059] This embodiment also proposes a control system for executing the above concrete hydration heat control method. The control system includes a cooling water supply module, a water temperature regulating module, a flow distribution module and a cooling module connected in sequence, and also includes a control module connected to the above modules in communication, wherein the cooling module includes a plurality of water pipes and a plurality of first temperature sensors 1, the plurality of water pipes are pre-buried in the concrete component 100 according to the water pipe arrangement scheme, and the plurality of first temperature sensors 1 are pre-buried at each measuring point according to the measuring point arrangement scheme, the cooling water supply module includes a water pump, the water pump is connected to the water temperature regulating module to supply cooling water to the water temperature regulating module, the flow distribution module includes a diverter 15, a first regulating valve 16 and a third flow meter 17, the inlet of the diverter 15 is connected to the water temperature regulating module, and the first regulating valve 16 is connected to the third regulating valve 17. The control module is configured to control the flow of the cooling water supply module, the flow distribution module, the water temperature adjustment module and the cooling module, and the cooling water supply module is configured to control the flow of the cooling water entering the concrete component 100. The control module is configured to control the flow of the cooling water entering the concrete component 100, and the water temperature adjustment module is configured to adjust the temperature of the cooling water.

[0060] After receiving the temperature signal fed back by the first temperature sensor 1, the control module in the above control system compares the actual temperature change rate with the theoretical temperature change rate according to time. If the actual temperature change rate is not greater than the theoretical temperature change rate, it works according to the preset frequency. If the actual temperature change rate is greater than the theoretical temperature change rate, the actual water inlet flow rate is adjusted by adjusting the frequency of the water pump. It should be noted that after the actual water inlet flow rate increases or decreases, the opening of the first regulating valve 16 also needs to be adaptively adjusted.

[0061] In this embodiment, the water pump includes a first water pump 2, and the cooling water supply module also includes a storage water tank 3 and a second temperature sensor 5. The first water pump 2 is connected to the storage water tank 3 to provide the water in the storage water tank 3 to the concrete member 100. At the same time, the storage water tank 3 is also connected to the outlets of multiple water pipes, thereby forming a circulation flow of cooling water, realizing the recycling of cooling water, and reducing the hydration heat control cost. The second temperature sensor 5 is arranged in the storage water tank 3 to monitor the temperature of the cooling water in the storage water tank 3.

[0062] Furthermore, the cooling water supply module also includes a second water pump 4, a second regulating valve 23 and a third temperature sensor 6. The second water pump 4 is connected to an external water source such as a river, a tap water pipe, etc. and the water temperature regulating module. The second regulating valve 23 is arranged between the second water pump 4 and the water temperature regulating module. The third temperature sensor 6 is used to monitor the temperature of the external water source.

[0063] The first water pump 2 and the second water pump 4 can deliver water to the water temperature regulating module separately or simultaneously. The cooling water in the storage water tank 3 absorbs heat after passing through the concrete component 100, and the temperature becomes high. After passing through the water temperature regulating module, the temperature decreases. If the temperature after the decrease is consistent with the preset water inlet temperature, it is re-delivered to the concrete component 100 for recycling; if the temperature after the decrease is higher than the preset water inlet temperature, the second water pump 4 is started, and the first water pump 2 and the second water pump 4 supply cooling water at the same time, and the cooling water in the storage water tank 3 is further cooled by mixing with the external water source; after the cooling water in the storage water tank 3 circulates for a long time, it carries impurities inside, which may clog the water pipe. In order to avoid the above situation, a turbidity meter 7 is also provided in the storage water tank 3. When the turbidity of the water in the storage water tank 3 exceeds the preset turbidity range, the water in the storage water tank 3 is discharged. At this time, the second water pump 4 delivers cooling water to the concrete component 100 alone.

[0064] It is understandable that, since the second water pump 4 supplies external water, it is greatly affected by the external environment temperature and there is a possibility that the water inlet temperature is lower than the preset water inlet temperature. According to the "Massive Concrete Construction Standard", the difference between the water inlet temperature and the maximum temperature of the concrete component 100 cannot be greater than 25°C. Therefore, the water temperature adjustment module includes a refrigeration component and a heating component. When the cooling water temperature is higher than the preset water inlet temperature, the cooling water is cooled by the refrigeration component; when the external water temperature is lower than the preset water inlet temperature, the cooling water is heated by the heating component.

[0065] Specifically, the refrigeration unit includes a thermostatic water tank 13 and a spray pipe. The thermostatic water tank 13 is open, the heating unit is arranged in the thermostatic water tank 13, and the first water pump 2 supplies cooling water to the thermostatic water tank 13 through the spray pipe. When the cooling water in the storage water tank 3 is circulated, it can enter the thermostatic water tank 13 in a spraying manner through the spray pipe, thereby achieving self-cooling and reducing the cooling cost. The external water supplied by the second water pump 4 does not need to be cooled, and enters the thermostatic water tank 13 through the connecting pipe connected to the thermostatic water tank 13.

[0066] The water temperature regulating module also includes a third temperature sensor 6, which is arranged at the outlet of the thermostatic water tank 13 and is used to realize a closed loop to determine whether the cooling water flowing out of the thermostatic water tank 13 is consistent with a preset water inlet temperature.

[0067] More specifically, a three-way valve 22 is also connected between the storage water tank 3 and the water temperature adjustment module. When the turbidity of the cooling water in the storage water tank 3 exceeds the preset turbidity range, the constant temperature water tank 13 is disconnected from the storage water tank 3, and the cooling water in the storage water tank 3 is discharged through the three-way valve 22.

[0068] Since the cooling water circulates, when the first water pump 2 and the second water pump 4 simultaneously deliver cooling water to the cooling module in the concrete component 100, the amount of cooling water returning to the storage water tank 3 must be greater than the initial amount of cooling water in the storage water tank 3. On this basis, an overflow port is also provided on the storage water tank 3 for the cooling water to overflow.

[0069] In this embodiment, a water exchange valve 10 is connected between the second water pump 4 and the storage water tank 3. Before the construction of the concrete member 100, water can be delivered to the storage water tank 3 through the second water pump 4. At the same time, in order to realize the quantitative delivery of cooling water to the storage water tank 3, a liquid level sensor 8 is also provided in the storage water tank 3 to monitor the temperature in the storage water tank 3.

[0070] A drain valve 9 is also provided at the bottom of the storage water tank 3 to discharge the cooling water from the storage water tank 3 after the construction of the concrete component 100 is completed.

[0071] To achieve closed-loop control, the cooling water supply module also includes a first flow meter 11 and a second flow meter 12, wherein the first flow meter 11 is used to monitor the cooling water flow pumped by the first water pump 2 to the water temperature regulation module, and the second flow meter 12 is used to monitor the cooling water flow pumped by the second water pump 4 to the water temperature regulation module.

[0072] In this embodiment, the control module includes multiple controllers 18, and the controllers 18 are networked with each other. The acquired data can be transmitted to the cloud 19, and the parameters are sent down through the cloud 19 to adjust the actual water inlet flow and set the temperature, thereby ensuring the communication of field data, and facilitating the subsequent machine learning data, trend prediction, sending flow distribution relationships, and adjusting the actual water inlet flow.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for controlling the heat of concrete hydration, characterized in that: The following steps are involved: Conduct finite element simulation calculations based on the water pipe layout plan; Determine the measurement point layout and theoretical water inflow rate; Determining a frequency and flow rate characteristic curve of a water pump for pumping water into a concrete member (100); Obtaining a curve of temperature and time at the measuring point and calculating a theoretical temperature change rate; Pre-buried water pipes and temperature measuring components in the concrete component (100) according to the water pipe arrangement scheme and the measuring point arrangement scheme; Introduce cooling water into the water pipe according to the theoretical water inlet flow rate, and obtain the actual temperature change rate of the reference measuring point within time t; The actual temperature change rate of the reference measuring point is compared with the theoretical temperature change rate, and the actual temperature change rate is adjusted to be no greater than the theoretical temperature change rate.

2. The method for controlling concrete hydration heat according to claim 1, characterized in that: The theoretical water inlet flow rate is determined based on preset external environmental conditions, preset water inlet temperature, preset temperature drop rate threshold, and preset concrete surface and inside temperature difference threshold.

3. The method for controlling concrete hydration heat according to claim 1, characterized in that: The reference measuring point is the measuring point where the highest temperature appears within the time t.

4. The method for controlling concrete hydration heat according to claim 1, characterized in that: When acquiring the reference measuring point, determine the theoretical temperature gradient difference between any two adjacent measuring points in the same direction, determine the allowable range of the temperature gradient difference based on the theoretical temperature gradient difference, judge whether the actual temperature gradient difference between the corresponding two measuring points is within the preset allowable range of the temperature gradient difference, and remove the measuring point data that is not within the preset allowable range of the temperature gradient difference.

5. The method for controlling concrete hydration heat according to claim 1, characterized in that: The concrete hydration heat control method also includes evaluating the reference measuring point temperature value at a next time node based on the theoretical temperature change rate and the current node temperature of the reference measuring point, and increasing the water inlet flow rate if the reference measuring point temperature value at the next time node is greater than a set critical temperature.

6. The method for controlling concrete hydration heat according to claim 1, characterized in that: When cooling water is introduced into the water pipe, the actual water inlet temperature is adjusted so that the actual water inlet temperature is consistent with the preset water inlet temperature.

7. A control system for executing the concrete hydration heat control method according to claim 6, characterized in that: The control system comprises a cooling water supply module, a water temperature regulating module and a cooling module which are connected in sequence, the cooling module comprising a plurality of water pipes and a first temperature sensor (1), the water pipes and the first temperature sensor (1) being pre-buried in the concrete component (100) according to the water pipe arrangement scheme and the measuring point arrangement scheme; the water temperature regulating module is connected to the cooling module and the cooling water supply module, the cooling water supply module comprises a first water pump (2), a second water pump (4), a storage water tank (3), a second temperature sensor (5) and a third temperature sensor (6), the first water pump (2) being connected to the storage water tank and the water temperature regulating module, the second temperature sensor (5) being arranged in the storage water tank (3), the second water pump (4) being connected to an external water source and the water temperature regulating module, and the third temperature sensor (6) being used to monitor the temperature of the external water source; The control system further comprises a control module, and the control module is communicatively connected with the cooling water supply module, the water temperature adjustment module and the cooling module.

8. The control system according to claim 7, characterized in that: The water temperature regulating module comprises a constant temperature water tank (13), a spray pipe, a heating element and a fourth temperature sensor (14); the constant temperature water tank (13) is openly arranged; the heating element is arranged in the constant temperature water tank (13); the first water pump (2) supplies cooling water to the constant temperature water tank (13) through a plurality of the spray pipes; the second water pump (4) is connected to the constant temperature water tank (13) through a connecting pipe; and the fourth temperature sensor (14) is arranged at the outlet of the constant temperature water tank (13).

9. The control system according to claim 7, characterized in that: A three-way valve (22) is connected between the storage water tank (3) and the water temperature adjustment module, and a turbidity meter (7) is also provided in the storage water tank (3).

10. The control system according to claim 7, characterized in that: The control system further comprises a flow distribution module, wherein the flow distribution module is connected to the cooling module and the water temperature regulating module, and the flow distribution module is configured to distribute cooling water to each of the water pipes in the cooling module.

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