Intelligent annular spraying device and method for pier column

Abstract

The invention relates to the technical field of bridge construction and maintenance, in particular to an intelligent annular spraying device and method for a pier column. The intelligent annular spraying device comprises an annular spraying mechanism, a humidity collecting module, a strength monitoring module, a controller and a water supply mechanism; a stable physical water film maintenance layer is formed, so that the problems of film damage and maintenance interruption caused by strong wind tearing are avoided; surface humidity data are monitored in real time through a concrete surface humidity sensor, spraying maintenance is automatically started when the humidity is lower than a preset threshold value, a continuous wet state is ensured, a concrete stress sensor collects stress or strain data in real time and generates a concrete strength value, and spraying is automatically stopped when the strength reaches the preset threshold value. And accurate on-demand maintenance is realized. By adopting the technical scheme, the technical problems of poor maintenance continuity and quick water evaporation in a high-altitude strong wind environment are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction and maintenance technology, and in particular to an intelligent annular spraying device and method for bridge piers. Background Technology

[0002] After the concrete for the bridge piers is poured, continuous curing is required to ensure full cement hydration and prevent shrinkage cracks and insufficient strength caused by excessive moisture evaporation. Traditional curing methods often involve covering with plastic film, straw mats, or manual watering, relying on human experience to determine the timing and duration of curing. Among these, plastic film covering is one of the most widely used curing methods due to its low cost and ease of operation.

[0003] However, in high-altitude mountainous areas, due to harsh climatic conditions, traditional plastic films are easily torn and damaged by strong winds, leading to rapid evaporation of moisture from the pier surface and shrinkage cracks in the concrete. Frequent film replacements not only increase construction costs but also disrupt the continuity of curing, severely impacting the early strength development of the concrete and structural durability. Furthermore, manual watering methods are difficult to precisely control based on the actual water requirements of the concrete, often resulting in insufficient or excessive watering.

[0004] Therefore, how to achieve continuous, precise, and automated curing of bridge pier concrete in environments with high altitude, strong winds, and drastic temperature and humidity changes is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent annular spraying device and method for pier columns, which solves the technical problems in the prior art of interrupted curing and shrinkage cracks caused by rapid evaporation of concrete moisture due to easy damage to plastic film in high-altitude and windy environments.

[0006] To achieve the above objectives, the present invention provides an intelligent annular spraying device for pier columns. The intelligent annular spraying device for pier columns includes an annular spraying mechanism, a humidity acquisition module, a strength monitoring module, a controller, and a water supply mechanism. The annular spraying mechanism is fixed to the outer periphery of the pier column in layers by a retractable annular bracket, and is used to uniformly spray curing water onto the surface of the pier column. The humidity acquisition module includes at least two sets of concrete surface humidity sensors fixedly installed on the surface of the pier column. The concrete surface humidity sensors are respectively installed on the windward and leeward surfaces of the pier column. The humidity acquisition module is used to collect the humidity data of the pier column surface in real time. The strength monitoring module is a concrete stress sensor pre-embedded inside the pier column. The strength monitoring module is used to collect stress or strain data inside the pier column in real time and generate concrete strength values ​​according to a preset strength calculation model. Both the humidity acquisition module and the intensity monitoring module are communicatively connected to the controller. The water supply mechanism is connected to the annular spray mechanism through a water supply pipeline and is electrically connected to the controller. The controller is configured to: The system receives humidity data of the pier surface collected by the humidity acquisition module. When the surface humidity data is lower than a preset humidity threshold, it sends a start signal to the water supply mechanism to drive the annular spray mechanism to perform spray curing. The system receives the concrete strength value collected by the strength monitoring module. When the concrete strength value reaches the preset termination curing strength threshold, it sends a stop signal to the water supply mechanism to terminate the spraying operation.

[0007] The humidity acquisition module also includes an ambient humidity sensor, which is installed on the outside of the pier where it is sheltered from the rain and is electrically connected to the controller to collect ambient air humidity data. The controller dynamically adjusts the spraying duration and spraying frequency based on the difference between the surface humidity and the ambient humidity.

[0008] The annular spraying mechanism includes an annular water supply pipe and multiple adjustable nozzles. The annular water supply pipe is fixed around the outer periphery of the pier and is connected to the water supply mechanism through the water supply pipeline. The multiple adjustable nozzles are evenly distributed along the annular water supply pipe, and the nozzle outlet of each adjustable nozzle is set facing the surface of the pier. The spraying angle and spraying volume of each adjustable nozzle can be adjusted independently.

[0009] The water supply pipeline is equipped with a solenoid valve, which is communicatively connected to the controller.

[0010] The intelligent annular spray device further includes a temperature acquisition module, which comprises a concrete surface temperature sensor and an ambient temperature sensor. The concrete surface temperature sensor and the ambient temperature sensor are respectively installed on the surface of the pier and in a shaded area on the outside of the pier. Both the concrete surface temperature sensor and the ambient temperature sensor are electrically connected to the controller. The concrete surface temperature sensor is used to collect the surface temperature of the pier in real time, and the ambient temperature sensor is used to collect the ambient temperature in real time. The controller uses the temperature difference data between the surface temperature of the pier and the ambient temperature to help determine the timing of spray activation.

[0011] The intelligent annular spray device also includes a colorimetric acquisition module, which is installed on the surface of the pier and electrically connected to the controller. The colorimetric acquisition module is used to collect colorimetric information of the pier surface to help determine the surface dryness and wetness, and serves as a redundant input signal for spray control.

[0012] The water supply system includes a main water tank, a backup water tank, a main variable frequency water pump, and a backup variable frequency water pump. The input end of the main variable frequency water pump is connected to the main water tank via a pipeline, and the output end of the main variable frequency water pump is connected to the annular water supply pipe via the water supply pipeline. The input end of the backup variable frequency water pump is connected to the backup water tank via a pipeline, and the output end of the backup variable frequency water pump is connected to the annular water supply pipe via the water supply pipeline. Both the main water tank and the backup water tank are equipped with insulation layers and electric heat tracing devices. The water supply pipeline is an insulated pipe equipped with heat tracing devices and backwash interfaces.

[0013] The present invention also provides an intelligent annular spraying method for pier columns, applied to the intelligent annular spraying device for pier columns as described above, comprising the following steps: The concrete surface humidity sensor collects real-time humidity data of the pier column, and the concrete stress sensor collects real-time stress or strain data inside the pier column, and generates concrete strength values ​​based on a preset strength estimation model. The controller compares the collected surface humidity data with a preset humidity threshold. When the surface humidity is lower than the preset humidity threshold, the controller sends a start signal to the water supply mechanism to drive the annular spray mechanism to perform spray curing. The generated concrete strength value is compared with a preset termination curing strength threshold. When the concrete strength value reaches the preset termination curing strength threshold, the controller sends a stop signal to the water supply mechanism to terminate the spraying operation.

[0014] The preset termination of curing strength threshold is 70% of the concrete design strength.

[0015] This invention discloses an intelligent annular spraying device and method for pier columns, comprising an annular spraying mechanism, a humidity acquisition module, a strength monitoring module, a controller, and a water supply mechanism. The annular spraying mechanism replaces the traditional plastic film. Because the annular spraying mechanism is arranged around the outer perimeter of the pier column and connected to the water supply mechanism via a water supply pipeline, a stable physical water film curing layer is formed, fundamentally avoiding film damage and curing interruption caused by strong winds. Simultaneously, a concrete surface humidity sensor monitors surface humidity data in real time. The controller automatically starts spraying curing when the humidity is below a preset threshold, ensuring continuous humidification and preventing rapid evaporation of concrete moisture. Furthermore, a concrete stress sensor embedded inside the pier column collects stress or strain data in real time and generates concrete strength values. When the strength reaches a preset threshold, the controller automatically terminates spraying, achieving precise and on-demand curing. This technical solution effectively solves the technical problems of poor curing continuity and rapid moisture evaporation in high-altitude, windy environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a block diagram illustrating the operating principle of the intelligent annular spray device for pier columns provided by the present invention.

[0018] Figure 2 This is a schematic diagram of the connection structure between the annular spray mechanism and the water supply mechanism provided by the present invention.

[0019] Figure 3 This is a flowchart of the steps of the intelligent annular spraying method for pier columns provided by the present invention.

[0020] 101-Annular spray mechanism, 102-Humidity acquisition module, 103-Strength monitoring module, 104-Controller, 105-Water supply mechanism, 106-Concrete surface humidity sensor, 107-Concrete stress sensor, 108-Water supply pipeline, 109-Ambient humidity sensor, 110-Annular water supply pipe, 111-Adjustable nozzle, 112-Solenoid valve, 113-Temperature acquisition module, 114-Concrete surface temperature sensor, 115-Ambient temperature sensor, 116-Color acquisition module, 117-Retractable annular support, 118-Main water tank, 119-Backup water tank, 120-Main variable frequency water pump, 121-Backup variable frequency water pump, 122-Power supply module, 123-Communication module, 124-Fault alarm module. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] Please see Figure 1 and Figure 2 The present invention provides an intelligent annular spraying device for pier columns. The intelligent annular spraying device for pier columns includes an annular spraying mechanism 101, a humidity acquisition module 102, an intensity monitoring module 103, a controller 104, and a water supply mechanism 105. The annular spraying mechanism 101 is fixed to the outer periphery of the pier column in layers by a telescopic annular bracket 117, and is used to uniformly spray curing water onto the surface of the pier column. The humidity acquisition module 102 includes at least two sets of concrete surface humidity sensors 106 fixedly installed on the surface of the pier column. The concrete surface humidity sensors 106 are respectively installed on the windward and leeward surfaces of the pier column. The humidity acquisition module 102 is used to collect the humidity data of the pier column surface in real time. The strength monitoring module 103 is a concrete stress sensor 107 pre-embedded inside the pier column. The strength monitoring module 103 is used to collect stress or strain data inside the pier column in real time and generate concrete strength values ​​according to a preset strength calculation model. The humidity acquisition module 102 and the intensity monitoring module 103 are both communicatively connected to the controller 104. The water supply mechanism 105 is connected to the annular spray mechanism 101 through the water supply pipeline 108 and is electrically connected to the controller 104. The controller 104 is configured to: The system receives humidity data of the pier surface collected by the humidity acquisition module 102. When the surface humidity data is lower than a preset humidity threshold, it sends a start signal to the water supply mechanism 105 to drive the annular spray mechanism 101 to perform spray curing. The system receives the concrete strength value collected by the strength monitoring module 103. When the concrete strength value reaches the preset termination curing strength threshold, it sends a stop signal to the water supply mechanism 105 to terminate the spraying operation.

[0023] In this embodiment, the annular spraying mechanism 101 replaces the traditional plastic film. Since the annular spraying mechanism 101 is arranged around the outer perimeter of the pier and connected to the water supply mechanism 105 via the water supply pipe 108, a stable physical water film curing layer is formed, fundamentally avoiding film damage and curing interruption caused by strong winds. Simultaneously, the concrete surface humidity sensor 106 monitors surface humidity data in real time, and the controller 104 automatically starts spray curing when the humidity is below a preset threshold, ensuring continuous humidification and preventing rapid evaporation of concrete moisture. Furthermore, the concrete stress sensor 107, embedded inside the pier, collects stress or strain data in real time and generates concrete strength values. When the strength reaches a preset threshold, the controller 104 automatically terminates spraying, achieving precise, on-demand curing. This technical solution effectively solves the technical problems of poor curing continuity and rapid moisture evaporation in high-altitude, windy environments.

[0024] The controller is specifically configured to: start spraying when the surface humidity of the pier column is lower than the preset humidity threshold, stop spraying when the concrete strength reaches 70% of the concrete design strength, and dynamically adjust the spraying parameters according to the difference between the surface humidity and the ambient humidity. When the difference is greater than 20%, the duration is extended and the frequency is increased, and when the difference is less than 10%, the duration is shortened and the frequency is reduced.

[0025] Furthermore, the humidity acquisition module 102 also includes an ambient humidity sensor 109, which is installed on the outside of the pier where it is sheltered from the rain and is electrically connected to the controller 104 to collect ambient air humidity data; the controller 104 dynamically adjusts the spraying duration and spraying frequency according to the difference between the surface humidity and the ambient humidity.

[0026] In this embodiment, the controller 104 has a built-in humidity difference comparison table. When the difference between the surface humidity and the ambient humidity is greater than a first preset difference (20%), it is determined that the evaporation rate of water on the pier surface is relatively fast, and the controller 104 extends the duration of a single spray and increases the spray frequency. When the difference is less than a second preset difference (10%), it is determined that the evaporation rate is relatively slow, and the controller 104 shortens the spray duration and reduces the spray frequency. Through dynamic adjustment, water is supplied on demand, avoiding water waste caused by excessive spraying.

[0027] Furthermore, the annular spraying mechanism 101 includes an annular water supply pipe 110 and multiple adjustable nozzles 111. The annular water supply pipe 110 is fixed around the outer periphery of the pier and is connected to the water supply mechanism 105 through the water supply pipeline 108. The multiple adjustable nozzles 111 are evenly distributed along the annular water supply pipe 110, and the nozzle outlet of each adjustable nozzle 111 is set facing the surface of the pier. The spraying angle and spraying volume of each adjustable nozzle 111 can be adjusted independently.

[0028] The retractable annular support 117 is adapted to cylindrical piers with a diameter of 0.5-3m and rectangular piers with a side length of 0.5-3m. The annular water supply pipe 110 is arranged in layers every 3-5m. The adjustable nozzles 111 are evenly distributed along the annular water supply pipe 110, and the spray angle and spray volume can be adjusted independently.

[0029] In this embodiment, the adjustable nozzle 111 is a spherical universal nozzle, which can ensure that the water mist evenly covers the surface of the pier by adjusting the spray angle.

[0030] Furthermore, a solenoid valve 112 is installed on the water supply pipeline 108, and the solenoid valve 112 is communicatively connected to the controller 104.

[0031] In this embodiment, the solenoid valve 112 is a normally closed solenoid valve. When the controller 104 sends a start signal, the solenoid valve 112 opens and the water supply pipeline 108 is connected; when the controller 104 sends a stop signal, the solenoid valve 112 closes and the water supply is cut off.

[0032] Furthermore, the intelligent annular spray device also includes a temperature acquisition module 113, which includes a concrete surface temperature sensor 114 and an ambient temperature sensor 115. The concrete surface temperature sensor 114 and the ambient temperature sensor 115 are respectively installed on the surface of the pier and in a light-proof location on the outside of the pier. Both the concrete surface temperature sensor 114 and the ambient temperature sensor 115 are electrically connected to the controller 104. The concrete surface temperature sensor 114 is used to collect the surface temperature of the pier in real time, and the ambient temperature sensor 115 is used to collect the ambient temperature in real time. The controller 104 uses the temperature difference data between the surface temperature of the pier and the ambient temperature to help determine the timing of spraying.

[0033] In this embodiment, the controller 104 has a built-in temperature difference threshold. When the temperature difference between the surface temperature of the pier and the ambient temperature exceeds the preset temperature difference threshold (temperature difference exceeds 15°C), it is determined that the surface of the pier is in a high-temperature evaporation state. Even if the humidity data is not lower than the threshold, the controller 104 can start spray curing in advance to achieve predictive control and further ensure the moisture state of the concrete.

[0034] Furthermore, the intelligent annular spray device also includes a colorimetric acquisition module 116, which is disposed on the surface of the pier and electrically connected to the controller 104. It is used to acquire colorimetric information of the pier surface to assist in judging the surface dryness and wetness, and serves as a redundant input signal for spray control.

[0035] In this embodiment, the colorimetric acquisition module 116 is an RGB color sensor, and the controller 104 pre-acquires the reference colorimetric value of the pier under wet conditions. When the difference between the real-time colorimetric value and the reference colorimetric value exceeds a preset colorimetric threshold (a difference exceeding ±20 is used as a redundant input signal), it is determined that the pier surface has begun to dry, which can be used as a redundancy verification signal for the humidity acquisition module 102. When both the humidity acquisition module 102 and the colorimetric acquisition module 116 determine that the pier is in a dry state, the controller 104 forcibly starts spray curing, improving the system's fault tolerance and reliability.

[0036] Furthermore, the water supply mechanism includes a main water tank 118, a backup water tank 119, a main variable frequency water pump 120, and a backup variable frequency water pump 121. The input end of the main variable frequency water pump 120 is connected to the main water tank 118 via a pipe, and the output end of the main variable frequency water pump 120 is connected to the annular water supply pipe 110 via the water supply pipeline 108. The input end of the backup variable frequency water pump 121 is connected to the backup water tank 119 via a pipe, and the output end of the backup variable frequency water pump 121 is connected to the annular water supply pipe 110 via the water supply pipeline 108. Both the main water tank 118 and the backup water tank 119 are equipped with insulation layers and electric heat tracing devices. The water supply pipeline 108 is an insulated pipe and is equipped with a heat tracing device and a backwashing interface.

[0037] In this embodiment, the controller 104 controls the water supply and water pressure by adjusting the speed of the main variable frequency water pump 120 and the standby variable frequency water pump 121. For every 5% increase in humidity difference, the pump speed increases by 10%.

[0038] Furthermore, the controller 104 supports seasonal mode switching and automatically adjusts the preset humidity threshold and preset termination maintenance intensity threshold according to seasonal characteristics.

[0039] In this embodiment, under the high temperature and dry conditions of summer, the preset humidity threshold is increased to 85% to ensure that spraying starts earlier; under the low temperature conditions of winter, the preset humidity threshold is decreased to 70% to avoid excessive spraying that could cause concrete to freeze; the preset termination of curing strength threshold is uniformly set to 70% of the concrete design strength to ensure curing quality.

[0040] Furthermore, the strength estimation model in the strength monitoring module 103 is a maturity model, which is constructed based on the Nurse-Saul formula and includes the strength-strain relationship curves of commonly used concrete grades for C30, C40, and C50 bridges. It also supports parameter correction based on the on-site concrete mix proportions.

[0041] In this embodiment, the strength estimation model is based on the concrete maturity theory. It uses stress sensors to collect strain data inside the concrete in real time, combines it with a pre-calibrated strength-strain relationship curve and temperature data inside the concrete collected by temperature sensors, calculates the equivalent age and maturity value of the concrete according to the Nurse-Saul maturity formula, and then estimates the concrete strength value at the current moment.

[0042] Furthermore, the intelligent ring-shaped spray device also includes a power supply module 122, a communication module 123, and a fault alarm module 124. The power supply module 122 is a combination structure of solar photovoltaic panel + battery + diesel generator. The communication module 123 is a shielded twisted pair or LoRa / NB-IoT wireless communication module. The fault alarm module 124 is used for audible and visual alarms and information uploading when the equipment fails.

[0043] Furthermore, the concrete surface humidity sensor 106, the concrete surface temperature sensor 114, and the colorimetric acquisition module 116 are all equipped with waterproof, UV-resistant, and impact-resistant metal protective housings; all sensors are calibrated for the first time after installation and are calibrated regularly every quarter.

[0044] Please see Figure 3 The present invention also provides an intelligent annular spraying method for pier columns, applied to the intelligent annular spraying device for pier columns as described above, comprising the following steps: S1: The concrete surface humidity sensor 106 collects the surface humidity data of the pier column in real time, and the concrete stress sensor 107 collects the stress or strain data inside the pier column in real time, and generates the concrete strength value according to the preset strength calculation model. S2: The collected surface humidity data is compared with a preset humidity threshold. When the surface humidity is lower than the preset humidity threshold, the controller 104 sends a start signal to the water supply mechanism 105 to drive the annular spray mechanism 101 to perform spray curing. S3: The generated concrete strength value is compared with the preset termination curing strength threshold. When the concrete strength value reaches the preset termination curing strength threshold, the controller 104 sends a stop signal to the water supply mechanism 105 to terminate the spraying operation.

[0045] In this embodiment, the concrete surface humidity sensor 106 collects surface humidity data in real time and compares it with a preset humidity threshold. When the humidity is below the threshold, the controller 104 automatically starts spray curing to ensure the pier surface remains continuously moist, effectively preventing shrinkage cracks caused by rapid evaporation of moisture. Simultaneously, the pre-embedded concrete stress sensor 107 collects internal stress or strain data in real time, generates a concrete strength value based on a preset strength calculation model, and compares it with a preset termination curing strength threshold. When the strength reaches the threshold, the controller 104 automatically terminates the spraying operation, achieving precise and on-demand curing. This method combines humidity-triggered instantaneous moisturizing control with strength-driven endpoint judgment, solving the problem of curing interruption caused by the easy damage of traditional membranes in high-altitude, windy environments, and avoiding resource waste caused by over-curing. It achieves fully automated, precise, and intelligent control of the entire pier concrete curing process.

[0046] The preset termination of curing strength threshold is 70% of the concrete design strength.

[0047] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. An intelligent annular sprinkler system for pier columns, characterized in that, It includes a ring-shaped spraying mechanism, a humidity acquisition module, an intensity monitoring module, a controller, and a water supply mechanism. The ring-shaped spraying mechanism is fixed to the outer periphery of the pier column in layers by a retractable ring bracket, and is used to uniformly spray curing water onto the surface of the pier column. The humidity acquisition module includes at least two sets of concrete surface humidity sensors fixedly installed on the surface of the pier column. The concrete surface humidity sensors are respectively installed on the windward and leeward surfaces of the pier column. The humidity acquisition module is used to collect the humidity data of the pier column surface in real time. The strength monitoring module is a concrete stress sensor pre-embedded inside the pier column. The strength monitoring module is used to collect stress or strain data inside the pier column in real time and generate concrete strength values ​​according to a preset strength calculation model. Both the humidity acquisition module and the intensity monitoring module are communicatively connected to the controller. The water supply mechanism is connected to the annular spray mechanism through a water supply pipeline and is electrically connected to the controller. The controller is configured to: The system receives humidity data of the pier surface collected by the humidity acquisition module. When the surface humidity data is lower than a preset humidity threshold, it sends a start signal to the water supply mechanism to drive the annular spray mechanism to perform spray curing. The system receives the concrete strength value collected by the strength monitoring module. When the concrete strength value reaches the preset termination curing strength threshold, it sends a stop signal to the water supply mechanism to terminate the spraying operation.

2. The intelligent annular sprinkler system for piers as described in claim 1, characterized in that, The humidity acquisition module also includes an ambient humidity sensor, which is installed on the outside of the pier where it is sheltered from the rain and is electrically connected to the controller to collect ambient air humidity data. The controller dynamically adjusts the spraying duration and spraying frequency based on the difference between the surface humidity and the ambient humidity.

3. The intelligent annular sprinkler system for piers as described in claim 2, characterized in that, The annular spraying mechanism includes an annular water supply pipe and multiple adjustable nozzles. The annular water supply pipe is fixed around the outer periphery of the pier and is connected to the water supply mechanism through the water supply pipeline. The multiple adjustable nozzles are evenly distributed along the annular water supply pipe, and the nozzle outlet of each adjustable nozzle is set facing the surface of the pier. The spraying angle and spray volume of each adjustable nozzle can be adjusted independently.

4. The intelligent annular sprinkler system for piers as described in claim 3, characterized in that, A solenoid valve is installed on the water supply pipeline, and the solenoid valve is communicatively connected to the controller.

5. The intelligent annular sprinkler system for piers as described in claim 4, characterized in that, The intelligent annular sprinkler system also includes a temperature acquisition module, which comprises a concrete surface temperature sensor and an ambient temperature sensor. The concrete surface temperature sensor and the ambient temperature sensor are respectively installed on the surface of the pier and in a shaded area on the outside of the pier. Both the concrete surface temperature sensor and the ambient temperature sensor are electrically connected to the controller. The concrete surface temperature sensor is used to collect the surface temperature of the pier in real time, and the ambient temperature sensor is used to collect the ambient temperature in real time. The controller uses the temperature difference data between the surface temperature of the pier and the ambient temperature to help determine the timing of sprinkler activation.

6. The intelligent annular sprinkler system for piers as described in claim 5, characterized in that, The intelligent annular spray device also includes a colorimetric acquisition module, which is installed on the surface of the pier and electrically connected to the controller. The colorimetric acquisition module is used to collect colorimetric information of the pier surface to help determine the surface dryness and wetness, and serves as a redundant input signal for spray control.

7. The intelligent annular sprinkler system for piers as described in claim 6, characterized in that, The water supply system includes a main water tank, a backup water tank, a main variable frequency water pump, and a backup variable frequency water pump. The input end of the main variable frequency water pump is connected to the main water tank via a pipeline, and the output end of the main variable frequency water pump is connected to the annular water supply pipe via the water supply pipeline. The input end of the backup variable frequency water pump is connected to the backup water tank via a pipeline, and the output end of the backup variable frequency water pump is connected to the annular water supply pipe via the water supply pipeline. Both the main water tank and the backup water tank are equipped with insulation layers and electric heat tracing devices. The water supply pipeline is an insulated pipe equipped with heat tracing devices and backwash interfaces.

8. A method for intelligent annular spraying of pier columns, applied to the intelligent annular spraying device for pier columns as described in claim 7, characterized in that, Includes the following steps: The concrete surface humidity sensor collects real-time humidity data of the pier column, and the concrete stress sensor collects real-time stress or strain data inside the pier column, and generates concrete strength values ​​based on a preset strength estimation model. The controller compares the collected surface humidity data with a preset humidity threshold. When the surface humidity is lower than the preset humidity threshold, the controller sends a start signal to the water supply mechanism to drive the annular spray mechanism to perform spray curing. The generated concrete strength value is compared with a preset termination curing strength threshold. When the concrete strength value reaches the preset termination curing strength threshold, the controller sends a stop signal to the water supply mechanism to terminate the spraying operation.

9. The intelligent annular spraying method for pier columns as described in claim 8, characterized in that, The preset termination curing strength threshold is 70% of the concrete design strength.

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