High pier concrete distributed temperature control electric heat storage intelligent maintenance method

Abstract

The application is suitable for the technical field of concrete curing control, and provides a high-pier concrete distributed temperature control electric heat storage intelligent curing method.The method comprises the following steps: a distributed electric heat storage template is set for a current construction section, and the concrete mold temperature, the temperature measurement data of the current construction section, the external meteorological parameters and the section height are obtained.The distributed electric heat storage template comprises a plurality of independently controlled heating subareas and phase change heat storage units corresponding to the heating subareas; and the environmental heat exchange correction coefficient of the current construction section is determined according to the section height and the external meteorological parameters.The application corrects the basic staged temperature control curve, so that the preheating stage curve, the temperature rising stage curve, the constant temperature curing stage curve and the temperature control cooling stage curve can adapt to the actual heat exchange environment of the construction section with different heights, and the problems of insufficient preheating, temperature rising lag, insufficient constant temperature compensation or excessive cooling speed of the fixed temperature control curve under the condition of enhanced air cooling at high altitude are avoided.

Description

Technical Field

[0001] This invention belongs to the field of concrete curing control technology, and particularly relates to a distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete. Background Technology

[0002] Currently, high-altitude cast-in-place concrete structures such as high piers, towers, and cable towers are widely used in road and bridge engineering, especially during construction in winter, cold regions, or high-altitude areas, where concrete curing temperature directly affects cement hydration reaction, early strength development, and structural durability. Existing technologies typically employ thermal insulation materials, electrically heated formwork, electric blankets, or zoned heating devices for concrete curing. Other technologies collect concrete temperature data and control heating power according to a preset temperature control curve to achieve temperature control during preheating, heating, constant-temperature curing, and cooling processes.

[0003] However, existing technologies often treat the same type of high pier construction segments as identical or similar temperature control objects. They typically generate fixed or nearly fixed staged temperature control curves based on the concrete pouring temperature, ambient temperature, and preset curing targets, without fully considering the impact of changes in the height of the current construction segment on external heat exchange conditions. For high-altitude cast-in-place structures such as high piers, towers, and cable towers, the effects of wind speed, ambient temperature fluctuations, and convective heat transfer outside the formwork usually increase with the height of the construction segment. If the same preheating target temperature, heating time, constant temperature target temperature, constant temperature holding time, temperature control and cooling rate, or reserved heat storage are still used, problems such as insufficient preheating, delayed heating, insufficient heat compensation during the constant temperature stage, and excessively rapid cooling during the temperature control and cooling stage are likely to occur.

[0004] Therefore, the existing technology has at least the following defects: it lacks an intelligent curing method for high-pier concrete that can incorporate segment height and external meteorological parameters into the temperature control curve generation process, it is difficult to correct the phased temperature control curve of the foundation according to the actual heat exchange environment of the current construction segment, and it is also difficult to coordinate multiple independently controlled heating zones and phase change heat storage units to store heat in the constant temperature curing stage and release heat in the temperature control and cooling stage. Summary of the Invention

[0005] The purpose of this invention is to provide a distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete, which aims to solve the problems mentioned in the background art.

[0006] This invention is implemented as follows: a distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete, the method comprising:

[0007] A distributed electric thermal storage template is set up for the current construction segment, and the concrete pouring temperature, temperature measurement data of the current construction segment, external meteorological parameters and segment height are acquired. The distributed electric thermal storage template includes multiple independently controlled heating zones and phase change thermal storage units corresponding to the heating zones.

[0008] Determine the environmental heat transfer correction coefficient for the current construction segment based on the segment height and external meteorological parameters;

[0009] Based on the concrete pouring temperature, temperature measurement data, and preset curing targets, generate the foundation stage temperature control curve for the current construction segment;

[0010] The basic staged temperature control curve is corrected according to the environmental heat transfer correction coefficient to obtain the corrected staged temperature control curve, which includes the preheating stage curve, the heating stage curve, the constant temperature curing stage curve, and the temperature control and cooling stage curve.

[0011] The heating power of each heating zone is controlled according to the modified phased temperature control curve. During the constant temperature curing stage, the phase change heat storage unit stores heat, and during the temperature control and cooling stage, the phase change heat storage unit releases heat to the concrete.

[0012] As a further limitation of the technical solution of this invention, the step of determining the environmental heat transfer correction coefficient of the current construction segment based on the segment height and external meteorological parameters includes:

[0013] A height correction factor is determined based on the difference between the segment height and the preset reference segment height, and the height correction factor increases as the segment height increases;

[0014] The meteorological correction factor is determined based on the difference between the external meteorological parameters and the preset benchmark meteorological parameters. The meteorological correction factor is used to characterize the degree of heat exchange enhancement of the current construction segment's construction environment relative to the preset benchmark meteorological parameters.

[0015] The environmental heat transfer correction coefficient is determined based on the altitude correction factor and the meteorological correction factor.

[0016] As a further limitation of the technical solution of this invention, the step of generating the foundation stage temperature control curve for the current construction segment based on the concrete pouring temperature, temperature measurement data, and preset curing targets includes:

[0017] Determine the target maintenance temperature, allowable heating rate, preset core-surface temperature difference range, constant temperature maintenance conditions, and allowable cooling rate based on the preset maintenance objectives.

[0018] The initial temperature state of the current construction segment is determined based on the concrete pouring temperature and temperature measurement data.

[0019] Generate a basic heating stage curve based on the initial temperature state, target curing temperature, and allowable heating rate;

[0020] Generate a basic constant temperature curing stage curve based on the target curing temperature, the preset core surface temperature difference range, and the constant temperature maintenance conditions;

[0021] Generate a basic temperature control and cooling stage curve based on the allowable cooling rate;

[0022] A foundation preheating stage curve is generated based on the concrete pouring temperature, temperature measurement data, and the preset inner surface temperature of the formwork.

[0023] The foundation preheating stage curve, foundation heating stage curve, foundation constant temperature curing stage curve, and foundation temperature control and cooling stage curve are combined to form the foundation stage temperature control curve.

[0024] As a further limitation of the technical solution of this invention, the step of correcting the basic staged temperature control curve according to the environmental heat transfer correction coefficient to obtain the corrected staged temperature control curve includes:

[0025] The basic curve parameters are determined from the basic phased temperature control curve. The basic curve parameters include at least one of the following: basic preheating target temperature, basic heating time, basic constant temperature target temperature, basic constant temperature holding time, basic temperature control cooling rate, and basic reserved heat storage.

[0026] Determine the curve correction amount corresponding to the basic curve parameters based on the environmental heat transfer correction coefficient;

[0027] The base curve parameters are corrected based on the curve correction amount to obtain the corrected curve parameters;

[0028] A modified staged temperature control curve is generated based on the modified curve parameters.

[0029] As a further limitation of the technical solution of this embodiment of the invention, when the environmental heat transfer correction coefficient characterizes the heat transfer enhancement of the current construction segment, the correction curve parameters relative to the base curve parameters satisfy at least one of the following:

[0030] Increase the target preheating temperature in the preheating stage curve;

[0031] Extend the heating time in the heating phase curve;

[0032] Increase the target constant temperature in the constant temperature curing stage curve;

[0033] Extend the constant temperature holding time in the constant temperature curing stage curve;

[0034] Add heat storage capacity to the phase change heat storage unit corresponding to the constant temperature curing stage or the temperature control and cooling stage;

[0035] Reduce the temperature control and cooling rate in the temperature control and cooling phase curve.

[0036] As a further limitation of the technical solution of this invention, the steps of controlling the heating power of each heating zone according to the modified staged temperature control curve, storing heat in the phase change heat storage unit during the constant temperature curing stage, and releasing heat to the concrete using the phase change heat storage unit during the temperature control and cooling stage include:

[0037] During the preheating stage, the heating power of the corresponding heating zone is controlled according to the preheating stage curve so that the inner surface temperature of the template reaches the preheating target temperature.

[0038] During the heating phase, the heating power of the corresponding heating zone is adjusted according to the heating phase curve and temperature measurement data to raise the concrete surface temperature to the constant target temperature.

[0039] During the constant temperature curing stage, the heating power of the corresponding heating zone is adjusted according to the constant temperature curing stage curve and temperature measurement data, so that the temperature difference between the concrete core and the concrete surface is within the preset core-surface temperature difference range, and the corresponding phase change heat storage unit absorbs the heat generated by the heating zone.

[0040] During the temperature control and cooling stage, the heating power of the corresponding heating zone is reduced according to the temperature control and cooling stage curve, and the corresponding phase change heat storage unit releases heat to the concrete through the distributed electric heat storage template to control the cooling rate of the concrete.

[0041] As a further limitation of the technical solution of the present invention, the segment height is the bottom elevation of the template, the middle elevation of the template, the top elevation of the template of the current construction segment, or a representative height determined by at least two of the bottom elevation of the template, the middle elevation of the template, and the top elevation of the template.

[0042] The temperature measurement data includes at least one of the following: the inner surface temperature of the template, the surface temperature of the concrete, the core temperature of the concrete, and the temperature of the phase change heat storage unit.

[0043] The external meteorological parameters include at least one of ambient temperature, ambient humidity, and wind speed.

[0044] As a further limitation of the technical solution of the present invention, the distributed electric heat storage template includes a steel template panel, a distributed electric heating functional layer, a phase change heat storage layer and a thermal insulation layer arranged sequentially from the side closer to the concrete to the side farther away from the concrete. The heating zone is arranged in the distributed electric heating functional layer and the phase change heat storage unit is arranged in the phase change heat storage layer.

[0045] Compared with existing technologies, this invention determines the environmental heat transfer correction coefficient of the current construction segment by introducing segment height and external meteorological parameters, and corrects the phased temperature control curve of the foundation accordingly. This allows the preheating stage curve, heating stage curve, constant temperature curing stage curve, and temperature control and cooling stage curve to adapt to the actual heat transfer environment of construction segments at different heights. This avoids problems such as insufficient preheating, delayed heating, insufficient constant temperature compensation, or excessively rapid cooling that occur when the fixed temperature control curve is used under high-altitude wind-cooled enhanced conditions.

[0046] This invention utilizes multiple independently controlled heating zones to achieve zoned temperature control, and through a phase change heat storage unit, it stores heat during the constant temperature curing stage and releases heat to the concrete during the controlled temperature cooling stage. This can improve the uniformity and stability of the concrete curing temperature, reduce the temperature difference between the concrete core and the concrete surface, reduce the risk of temperature cracks, and reduce the energy consumption of continuous electric heating.

[0047] This invention is applicable to the winter or low-temperature construction and maintenance of high-altitude cast-in-place concrete structures such as high piers, high towers, and cable towers. It can improve the level of intelligent maintenance and construction quality, and has good prospects for engineering promotion. Attached Figure Description

[0048] Figure 1 A flowchart of the method provided in the embodiments of the present invention;

[0049] Figure 2 This is a flowchart illustrating the determination of the environmental heat transfer correction coefficient in the method provided in this embodiment of the invention;

[0050] Figure 3 This is a flowchart illustrating the formation of a basic staged temperature control curve in the method provided in this embodiment of the invention;

[0051] Figure 4 This is a flowchart illustrating the generation of a modified staged temperature control curve in the method provided in this embodiment of the invention;

[0052] Figure 5 This is a flowchart illustrating the method provided in this embodiment of the invention for controlling the heating power of each heating zone according to a modified staged temperature control curve. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0054] Figure 1 A flowchart of the method provided by an embodiment of the present invention is shown.

[0055] Specifically, a distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete includes the following steps:

[0056] Step S100: Set up a distributed electric thermal storage template for the current construction segment, and acquire the concrete pouring temperature, temperature measurement data of the current construction segment, external meteorological parameters and segment height. The distributed electric thermal storage template includes multiple independently controlled heating zones and phase change thermal storage units corresponding to the heating zones.

[0057] In this embodiment of the invention, the distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete is mainly applied to low-temperature construction and curing scenarios for high-altitude cast-in-place concrete structures such as high piers, high towers, and cable towers in road and bridge engineering. It is particularly suitable for construction environments with large day-night temperature differences, such as winter, cold regions, high-altitude regions, or areas with significant temperature differences between day and night. These structures typically employ a segment-by-segment pouring and curing method. After the current construction segment is poured, it needs to maintain a suitable curing temperature to promote cement hydration and reduce the risk of cracking caused by excessive temperature differences between the concrete core and the concrete surface.

[0058] For high-altitude cast-in-place concrete structures such as high piers, towers, and cable towers, the external heat exchange environment changes as the height of each construction segment increases. For example, the effects of wind speed, ambient temperature fluctuations, and convective heat transfer outside the formwork typically intensify. Existing curing methods usually focus on whether heating is required and whether the preset curing temperature is reached, but they do not adequately consider the changes in heat exchange conditions caused by variations in segment height. If the same staged temperature control curve is used for construction segments at different heights, it can easily lead to insufficient preheating, delayed temperature rise, insufficient heat compensation during the constant temperature stage, or excessively rapid cooling during the temperature control and cooling stage.

[0059] Based on this, the core research point of this invention lies in using the height of the current construction segment as an important parameter affecting the temperature control process, and determining the environmental heat transfer correction coefficient for the current construction segment in conjunction with external meteorological parameters. Then, the environmental heat transfer correction coefficient is used to correct the phased temperature control curve of the foundation, thereby obtaining a corrected phased temperature control curve adapted to the actual heat transfer environment of the current construction segment. Thus, the preheating stage curve, the heating stage curve, the constant temperature curing stage curve, and the temperature control and cooling stage curve can be adjusted according to the height of the current construction segment and external meteorological conditions.

[0060] In step S100, setting up distributed electric thermal storage templates for the current construction segment means arranging template structures capable of zoned heating and phase change thermal storage at the template installation locations corresponding to the current construction segment. The current construction segment can be any segment in the segmented construction of a high pier, high tower, or cable tower along the height direction.

[0061] The distributed electric thermal storage formwork includes multiple independently controlled heating zones and corresponding phase change thermal storage units. These heating zones can be arranged along the height, circumferential direction, or formwork unit division direction of the current construction segment. Each heating zone can output its corresponding heating power to avoid localized overheating or underheating caused by uniform heating. The phase change thermal storage unit absorbs the heat generated by the corresponding heating zone during the constant temperature curing stage and releases heat to the concrete during the temperature control and cooling stage. One phase change thermal storage unit can correspond to one or more heating zones, and multiple phase change thermal storage units can also correspond to one heating zone.

[0062] The concrete placement temperature is used to characterize the initial temperature state of the concrete when it enters the formwork space of the current construction segment. The temperature measurement data reflects the actual temperature state of the current construction segment and the distributed electric thermal storage formwork, and includes at least one of the following: the inner surface temperature of the formwork, the concrete surface temperature, the concrete core temperature, and the phase change thermal storage unit temperature. The external meteorological parameters characterize the impact of the construction environment of the current construction segment on heat dissipation from the outside of the formwork, and include at least one of the following: ambient temperature, ambient humidity, and wind speed.

[0063] The segment height is used to characterize the height position of the current construction segment within the high pier, high tower, or cable tower structure. The segment height can be the bottom elevation, middle elevation, or top elevation of the formwork for the current construction segment, or it can be a representative height determined by at least two of the bottom, middle, and top elevations of the formwork, such as the average of the bottom and top elevations of the formwork.

[0064] The distributed electric thermal storage formwork includes a steel formwork panel, a distributed electric heating functional layer, a phase change thermal storage layer, and a thermal insulation layer, arranged sequentially from the side closest to the concrete to the side furthest from the concrete. The steel formwork panel is used to form the concrete forming interface and transfer heat to the concrete; the distributed electric heating functional layer is provided with the heating zone; the phase change thermal storage layer is provided with the phase change thermal storage unit; and the thermal insulation layer is used to reduce heat loss to the external environment.

[0065] Furthermore, the distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete also includes the following steps:

[0066] Step S200: Determine the environmental heat transfer correction coefficient for the current construction segment based on the segment height and external meteorological parameters.

[0067] Specifically, Figure 2 A flowchart for determining the environmental heat transfer correction factor is shown.

[0068] Specifically, step S200 includes the following steps:

[0069] Step S201: Determine a height correction factor based on the difference between the segment height and the preset reference segment height, wherein the height correction factor increases as the segment height increases;

[0070] Step S202: Determine the meteorological correction factor based on the difference between the external meteorological parameters and the preset benchmark meteorological parameters. The meteorological correction factor is used to characterize the degree of heat exchange enhancement of the construction environment of the current construction segment relative to the preset benchmark meteorological parameters.

[0071] Step S203: Determine the environmental heat transfer correction coefficient based on the altitude correction factor and the meteorological correction factor.

[0072] In this embodiment of the invention, the environmental heat transfer correction coefficient is not directly used as the heating power output value, but as the basis for subsequent correction of the basic stage temperature control curve, so that the corrected stage temperature control curve can be adapted to the actual heat transfer environment of the current construction segment.

[0073] The preset benchmark segment height can be a benchmark height pre-set in the construction plan, the segment height of a lower construction segment, or a reference height determined through experiments or historical construction data. Comparing the current construction segment height with the preset benchmark segment height yields the height difference. Generally, the higher the current construction segment, the more significantly it is affected by wind speed, temperature fluctuations, and convective heat transfer outside the formwork. Therefore, the height correction factor increases with the segment height. By setting the height correction factor, the heat transfer changes caused by the gradual raising of high piers, towers, or cable towers can be incorporated into the temperature control process.

[0074] The preset benchmark meteorological parameters can be at least one of benchmark ambient temperature, benchmark ambient humidity, and benchmark wind speed. The difference between the external meteorological parameters and the preset benchmark meteorological parameters is used to reflect the difference between the current construction segment's construction environment and the benchmark construction environment. The meteorological correction factor is used to characterize the degree of heat transfer enhancement of the current construction segment's construction environment relative to the preset benchmark meteorological parameters. For example, when the current wind speed is greater than the benchmark wind speed, convective heat transfer on the outside of the formwork is enhanced, and the meteorological correction factor increases accordingly; when the current ambient temperature is lower than the benchmark ambient temperature, the distributed electric thermal storage formwork's tendency to dissipate heat to the external environment is enhanced, and the meteorological correction factor can also increase accordingly.

[0075] Specifically, the height correction factor and the meteorological correction factor can be weighted and summed, weighted averaged, product-corrected, or hierarchically mapped to obtain the environmental heat transfer correction coefficient. The larger the environmental heat transfer correction coefficient, the higher the degree of heat transfer enhancement of the current construction segment relative to the baseline conditions, and the larger the correction range of the subsequent phased temperature control curve of the foundation can be.

[0076] For example, if the preset reference segment height is 20m and the current construction segment height is 60m, then the height difference between the current construction segment and the preset reference segment height is large, and the height correction factor increases accordingly. If the preset reference wind speed is 2m / s and the current wind speed is 6m / s, then the convective heat transfer on the outside of the formwork of the current construction segment is significantly enhanced, and the meteorological correction factor also increases accordingly. At this time, the environmental heat transfer correction coefficient obtained based on the height correction factor and the meteorological correction factor is large. Subsequently, the preheating target temperature in the preheating stage curve can be increased, the heating time in the heating stage curve can be extended, the constant temperature holding time in the constant temperature curing stage curve can be extended, the reserved heat storage capacity of the phase change heat storage unit can be increased, or the temperature control and cooling rate in the temperature control and cooling stage curve can be reduced.

[0077] Furthermore, the distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete also includes the following steps:

[0078] Step S300: Generate the foundation stage temperature control curve for the current construction segment based on the concrete pouring temperature, temperature measurement data, and preset curing targets.

[0079] Specifically, Figure 3 A flowchart for forming the basic staged temperature control curve is shown.

[0080] Specifically, step S300 includes the following steps:

[0081] Step S301: Determine the target curing temperature, allowable heating rate, preset core-surface temperature difference range, constant temperature holding conditions, and allowable cooling rate based on the preset curing target.

[0082] Step S302: Determine the initial temperature state of the current construction segment based on the concrete pouring temperature and temperature measurement data.

[0083] Step S303: Generate a foundation heating stage curve based on the initial temperature state, target curing temperature, and allowable heating rate, so that the concrete temperature gradually rises from the initial temperature state to the target curing temperature, and the heating rate does not exceed the allowable heating rate. For example, when the concrete pouring temperature is 8℃, the target curing temperature is 35℃, and the allowable heating rate is 8℃ / h, the foundation heating stage curve controls the concrete temperature to rise to 35℃ at a rate not exceeding 8℃ / h.

[0084] Step S304: Generate a foundation constant temperature curing stage curve based on the target curing temperature, the preset core-to-surface temperature difference range, and the constant temperature maintenance conditions. This ensures that the concrete is maintained near the target curing temperature and that the temperature difference between the concrete core and surface is within the preset core-to-surface temperature difference range. For example, if the target curing temperature is 35℃, the preset core-to-surface temperature difference range is within 15℃, and the constant temperature maintenance condition is 48h curing, the foundation constant temperature curing stage curve controls the concrete to be maintained near 35℃ for 48h.

[0085] Step S305: Generate a foundation temperature control and cooling stage curve based on the allowable cooling rate, so that the concrete gradually cools down after constant temperature curing in a manner that does not exceed the allowable cooling rate. For example, when the allowable cooling rate is 3℃ / h, the foundation temperature control and cooling stage curve controls the concrete to cool down at a rate not exceeding 3℃ / h.

[0086] Step S306: Generate a foundation preheating stage curve based on the concrete pouring temperature, temperature measurement data, and the preset inner surface temperature of the formwork. This ensures that the inner surface temperature of the formwork reaches the preset inner surface temperature, thereby reducing the heat absorption effect of the formwork on the newly poured concrete. For example, if the inner surface temperature of the formwork is 5℃ and the preset inner surface temperature is 20℃, the foundation preheating stage curve controls the inner surface temperature of the formwork to rise to 20℃.

[0087] Step S307: The foundation preheating stage curve, foundation heating stage curve, foundation constant temperature curing stage curve, and foundation temperature control and cooling stage curve are combined to form the foundation staged temperature control curve. This foundation staged temperature control curve serves as the basis for subsequent corrections based on the environmental heat transfer correction coefficient.

[0088] In this embodiment of the invention, the foundation phased temperature control curve refers to the foundation control curve determined based on the concrete pouring temperature, temperature measurement data, and preset curing targets before the introduction of the environmental heat transfer correction coefficient, and is used as the object of subsequent correction.

[0089] The target curing temperature is used to determine the temperature target during concrete curing; the allowable heating rate is used to limit the rate of temperature rise during the heating phase; the preset core-to-surface temperature difference range is used to limit the temperature difference between the concrete core and the concrete surface; the constant temperature maintenance conditions are used to determine the continuous conditions of the constant temperature curing phase; and the allowable cooling rate is used to limit the rate of temperature drop during the controlled cooling phase.

[0090] The initial temperature state can be determined by one or more of the following: concrete pouring temperature, inner surface temperature of the formwork, concrete surface temperature, concrete core temperature, and phase change heat storage unit temperature, to reflect the thermal state when the current construction segment begins curing.

[0091] Furthermore, the distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete also includes the following steps:

[0092] Step S400: Correct the basic staged temperature control curve according to the environmental heat transfer correction coefficient to obtain the corrected staged temperature control curve. The corrected staged temperature control curve includes the preheating stage curve, the heating stage curve, the constant temperature curing stage curve, and the temperature control and cooling stage curve.

[0093] Specifically, Figure 4A flowchart for generating the modified staged temperature control curve is shown.

[0094] Specifically, step S400 includes the following steps:

[0095] Step S401: Determine the base curve parameters from the base phased temperature control curve. These parameters include at least one of the following: base preheating target temperature, base heating time, base constant temperature target temperature, base constant temperature holding time, base temperature control and cooling rate, and base reserved heat storage capacity. These parameters correspond to the main control objectives of the preheating stage, heating stage, constant temperature curing stage, and temperature control and cooling stage, respectively.

[0096] Step S402: Determine the curve correction amount corresponding to the foundation curve parameters based on the environmental heat transfer correction coefficient. The curve correction amount is used to represent the extent to which the foundation curve parameters need to be adjusted. The larger the environmental heat transfer correction coefficient, the higher the degree of heat transfer enhancement in the current construction segment, and the larger the corresponding curve correction amount can be; when the environmental heat transfer correction coefficient is small, the corresponding curve correction amount can be small or zero.

[0097] Step S403: Correct the basic curve parameters according to the curve correction amount to obtain the corrected curve parameters. Specifically, one or more of the following can be corrected: basic preheating target temperature, basic heating time, basic constant temperature target temperature, basic constant temperature holding time, basic temperature control cooling rate, and basic reserved heat storage capacity. The correction can be performed using additive correction, proportional correction, graded correction, or table lookup correction, etc.

[0098] Step S404: Generate a modified staged temperature control curve based on the modified curve parameters. The modified staged temperature control curve includes a preheating stage curve, a heating stage curve, a constant temperature curing stage curve, and a temperature-controlled cooling stage curve, and is used to replace the basic staged temperature control curve to perform temperature-controlled curing for the current construction segment.

[0099] In this embodiment of the invention, when the environmental heat transfer correction coefficient characterizes the enhanced heat transfer of the current construction segment, it indicates that the current construction segment is more likely to dissipate heat to the external environment compared to the working condition corresponding to the foundation stage temperature control curve. At this time, the preheating target temperature in the preheating stage curve can be increased to reduce heat absorption by the formwork on the concrete during the initial pouring stage; the heating time in the heating stage curve can be extended to avoid temperature fluctuations caused by rapid heating under conditions of large heat dissipation; the constant temperature target temperature in the constant temperature curing stage curve can be increased or the constant temperature holding time can be extended to ensure that the concrete has sufficient curing heat; the reserved heat storage capacity of the phase change heat storage unit corresponding to the constant temperature curing stage or the temperature-controlled cooling stage can be increased to release heat during subsequent cooling; or the temperature-controlled cooling rate in the temperature-controlled cooling stage curve can be reduced to reduce the temperature stress caused by excessively rapid cooling of the concrete surface.

[0100] For example, in the phased temperature control curve of a certain construction segment, the target preheating temperature is 20℃, the heating time is 4 hours, the target constant temperature is 35℃, the constant temperature holding time is 48 hours, and the controlled cooling rate is 3℃ / h. If the environmental heat transfer correction coefficient for the current construction segment is large based on the segment height and external meteorological parameters, indicating enhanced heat transfer in that segment, then the target preheating temperature can be corrected to 22℃, the heating time to 5 hours, the constant temperature holding time to 54 hours, and the controlled cooling rate to 2℃ / h. The resulting corrected phased temperature control curve is more suitable for the high-altitude heat transfer environment of the current construction segment.

[0101] Furthermore, the distributed temperature-controlled electric thermal storage intelligent curing method for high-pier concrete also includes the following steps:

[0102] In step S500, the heating power of each heating zone is controlled according to the modified phased temperature control curve, and the phase change heat storage unit stores heat during the constant temperature curing stage, and the phase change heat storage unit releases heat to the concrete during the temperature control and cooling stage.

[0103] Specifically, Figure 5 A flowchart is shown showing the control of heating power for each heating zone according to a modified staged temperature control curve.

[0104] Specifically, step S500 includes the following steps:

[0105] Step S501: During the preheating stage, the heating power of the corresponding heating zone is controlled according to the preheating stage curve to ensure that the inner surface temperature of the template reaches the preheating target temperature. Preheating the inner surface of the template can reduce the heat absorption effect of the low-temperature template on the newly poured concrete. For example, if the preheating target temperature corresponding to the preheating stage curve is 22℃, the heating of the corresponding heating zone is controlled until the inner surface temperature of the template reaches approximately 22℃.

[0106] Step S502: During the heating phase, the heating power of the corresponding heating zone is adjusted according to the heating phase curve and temperature measurement data to raise the concrete surface temperature to the constant temperature target temperature. The temperature measurement data is used to provide feedback on the actual heating situation. When the concrete surface temperature is lower than the target value corresponding to the heating phase curve, the heating power of the corresponding heating zone is increased; when the concrete surface temperature is close to the target value, the heating power of the corresponding heating zone is decreased to avoid temperature overshoot.

[0107] Step S503: During the constant temperature curing stage, the heating power of the corresponding heating zone is adjusted according to the constant temperature curing stage curve and temperature measurement data to ensure that the temperature difference between the concrete core and the concrete surface is within the preset core-to-surface temperature difference range. The corresponding phase change heat storage unit absorbs the heat generated by the heating zone, thus achieving heat storage during the constant temperature curing stage. For example, when the temperature difference between the concrete core and the concrete surface approaches the upper limit of the preset core-to-surface temperature difference range, the heating power of the corresponding heating zone can be reduced or the heating process can be delayed to prevent the temperature difference from further widening.

[0108] In step S504, during the temperature control and cooling stage, the heating power of the corresponding heating zone is reduced according to the temperature control and cooling stage curve, and the corresponding phase change heat storage unit releases heat to the concrete through the distributed electric heat storage template to control the concrete cooling rate. Releasing heat through the phase change heat storage unit reduces the rapid drop in concrete surface temperature. For example, when the temperature control and cooling rate corresponding to the temperature control and cooling stage curve is 2℃ / h, the heating power of the heating zone is gradually reduced, and heat is released using the phase change heat storage unit, ensuring that the actual concrete cooling rate does not exceed 2℃ / h.

[0109] It should be understood that although the steps in the flowcharts of the various embodiments of the present invention are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the various embodiments may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0110] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for intelligent curing of high-pier concrete with distributed temperature control and electric thermal storage, characterized in that, The method includes: A distributed electric thermal storage template is set up for the current construction segment, and the concrete pouring temperature, temperature measurement data of the current construction segment, external meteorological parameters and segment height are acquired. The distributed electric thermal storage template includes multiple independently controlled heating zones and phase change thermal storage units corresponding to the heating zones. Determine the environmental heat transfer correction coefficient for the current construction segment based on the segment height and external meteorological parameters; Based on the concrete pouring temperature, temperature measurement data, and preset curing targets, generate the foundation stage temperature control curve for the current construction segment; The basic staged temperature control curve is corrected according to the environmental heat transfer correction coefficient to obtain the corrected staged temperature control curve, which includes the preheating stage curve, the heating stage curve, the constant temperature curing stage curve, and the temperature control and cooling stage curve. The heating power of each heating zone is controlled according to the modified phased temperature control curve. During the constant temperature curing stage, the phase change heat storage unit stores heat, and during the temperature control and cooling stage, the phase change heat storage unit releases heat to the concrete.

2. The intelligent curing method for distributed temperature-controlled electric thermal storage of high-pier concrete according to claim 1, characterized in that, The steps for determining the environmental heat transfer correction coefficient for the current construction segment based on segment height and external meteorological parameters include: A height correction factor is determined based on the difference between the segment height and the preset reference segment height, and the height correction factor increases as the segment height increases; The meteorological correction factor is determined based on the difference between the external meteorological parameters and the preset benchmark meteorological parameters. The meteorological correction factor is used to characterize the degree of heat exchange enhancement of the current construction segment's construction environment relative to the preset benchmark meteorological parameters. The environmental heat transfer correction coefficient is determined based on the altitude correction factor and the meteorological correction factor.

3. The intelligent curing method for distributed temperature-controlled electric thermal storage of high-pier concrete according to claim 1, characterized in that, The steps for generating the phased temperature control curve for the foundation of the current construction segment based on the concrete pouring temperature, temperature measurement data, and preset curing targets include: Determine the target maintenance temperature, allowable heating rate, preset core-surface temperature difference range, constant temperature maintenance conditions, and allowable cooling rate based on the preset maintenance objectives. The initial temperature state of the current construction segment is determined based on the concrete pouring temperature and temperature measurement data. Generate a basic heating stage curve based on the initial temperature state, target curing temperature, and allowable heating rate; Generate a basic constant temperature curing stage curve based on the target curing temperature, the preset core surface temperature difference range, and the constant temperature maintenance conditions; Generate a basic temperature control and cooling stage curve based on the allowable cooling rate; A foundation preheating stage curve is generated based on the concrete pouring temperature, temperature measurement data, and the preset inner surface temperature of the formwork. The foundation preheating stage curve, foundation heating stage curve, foundation constant temperature curing stage curve, and foundation temperature control and cooling stage curve are combined to form the foundation stage temperature control curve.

4. The intelligent curing method for distributed temperature-controlled electric thermal storage of high-pier concrete according to claim 1, characterized in that, The steps to correct the basic staged temperature control curve based on the environmental heat transfer correction coefficient and obtain the corrected staged temperature control curve include: The basic curve parameters are determined from the basic phased temperature control curve. The basic curve parameters include at least one of the following: basic preheating target temperature, basic heating time, basic constant temperature target temperature, basic constant temperature holding time, basic temperature control cooling rate, and basic reserved heat storage. Determine the curve correction amount corresponding to the basic curve parameters based on the environmental heat transfer correction coefficient; The base curve parameters are corrected based on the curve correction amount to obtain the corrected curve parameters; A modified staged temperature control curve is generated based on the modified curve parameters.

5. The intelligent curing method for distributed temperature-controlled electric thermal storage of high-pier concrete according to claim 4, characterized in that, When the environmental heat transfer correction coefficient characterizes the heat transfer enhancement of the current construction segment, the correction curve parameters relative to the base curve parameters satisfy at least one of the following: Increase the target preheating temperature in the preheating stage curve; Extend the heating time in the heating phase curve; Increase the target constant temperature in the constant temperature curing stage curve; Extend the constant temperature holding time in the constant temperature curing stage curve; Add heat storage capacity to the phase change heat storage unit corresponding to the constant temperature curing stage or the temperature control and cooling stage; Reduce the temperature control and cooling rate in the temperature control and cooling phase curve.

6. The intelligent curing method for distributed temperature-controlled electric thermal storage of high-pier concrete according to claim 1, characterized in that, The steps include controlling the heating power of each heating zone according to the modified staged temperature control curve, storing heat in the phase change heat storage unit during the constant temperature curing stage, and releasing heat to the concrete using the phase change heat storage unit during the temperature control and cooling stage. During the preheating stage, the heating power of the corresponding heating zone is controlled according to the preheating stage curve so that the inner surface temperature of the template reaches the preheating target temperature. During the heating phase, the heating power of the corresponding heating zone is adjusted according to the heating phase curve and temperature measurement data to raise the concrete surface temperature to the constant target temperature. During the constant temperature curing stage, the heating power of the corresponding heating zone is adjusted according to the constant temperature curing stage curve and temperature measurement data, so that the temperature difference between the concrete core and the concrete surface is within the preset core-surface temperature difference range, and the corresponding phase change heat storage unit absorbs the heat generated by the heating zone. During the temperature control and cooling stage, the heating power of the corresponding heating zone is reduced according to the temperature control and cooling stage curve, and the corresponding phase change heat storage unit releases heat to the concrete through the distributed electric heat storage template to control the cooling rate of the concrete.

7. The intelligent curing method for distributed temperature-controlled electric thermal storage of high-pier concrete according to claim 1, characterized in that, The segment height is the representative height determined by the bottom elevation, middle elevation, and top elevation of the formwork of the current construction segment, or by at least two of the bottom elevation, middle elevation, and top elevation of the formwork. The temperature measurement data includes at least one of the following: the inner surface temperature of the template, the surface temperature of the concrete, the core temperature of the concrete, and the temperature of the phase change heat storage unit. The external meteorological parameters include at least one of ambient temperature, ambient humidity, and wind speed.

8. The intelligent curing method for distributed temperature-controlled electric thermal storage of high-pier concrete according to claim 1, characterized in that, The distributed electric heat storage template includes a steel template panel, a distributed electric heating functional layer, a phase change heat storage layer, and a thermal insulation layer arranged sequentially from the side closest to the concrete to the side furthest from the concrete. The heating zone is located in the distributed electric heating functional layer, and the phase change heat storage unit is located in the phase change heat storage layer.

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