CN-121995995-A - Maintenance compensation system based on mass concrete temperature and humidity change rate

CN121995995ACN 121995995 ACN121995995 ACN 121995995ACN-121995995-A

Abstract

The invention belongs to the technical field of construction and maintenance of constructional engineering, in particular to a maintenance compensation system based on the temperature and humidity change rate of mass concrete, which comprises: the sensor network module is used for collecting temperature data, humidity data and stress data of the inside and the surface of the mass concrete in real time, the data processing and analyzing module is used for receiving and processing the collected data, calculating the change rate of the temperature and the humidity, carrying out risk assessment according to the change rate, generating a self-adaptive control strategy, and the executing mechanism module is used for receiving and executing the control strategy. According to the maintenance compensation system based on the temperature and humidity change rate of the mass concrete, multidimensional information such as temperature, humidity, stress and environment is comprehensively considered through multiparameter coupling analysis, the unilateral performance of single parameter decision is avoided, the wind self-adaptive PID controller can dynamically adjust parameters according to the concrete age and the real-time response of the system, and the control process is fast and stable.

Inventors

LI TONG
Zeng Xianding
LIN HAO
ZhuanSun Guangxun
LI WEI
ZHU TIESHENG
LU XIAOLIN
LIU LIN
LIN JIRUI
Ji Daiheng
WANG ZHIFENG

Assignees

中铁十四局集团第三工程有限公司
中铁十四局集团有限公司

Dates

Publication Date: 20260508
Application Date: 20251209

Claims (10)

1. A maintenance compensation system based on the temperature and humidity change rate of mass concrete is characterized by comprising: The sensor network module is used for collecting temperature data, humidity data and stress data of the interior and the surface of the mass concrete in real time; The data processing and analyzing module is connected with the sensor network and is used for receiving and processing the acquired data, calculating the change rate of temperature and humidity, performing risk assessment according to the change rate and generating a self-adaptive control strategy; The execution mechanism module is connected with the data processing and analyzing module and is used for receiving and executing the control strategy so as to adjust the temperature and humidity environment of the concrete; And the BIM+iot fusion platform integrates sensor data, BIM model information and environment data and provides visual monitoring, risk early warning and decision support functions.
2. The maintenance compensation system based on the temperature and humidity change rate of the mass concrete according to claim 1, wherein the sensor network module comprises: The embedded temperature sensors are arranged in the concrete in a layered mode according to the depths of 0.1m, 0.5m, 1.0m, 1.5m and 2.0m, and the DS18B20 waterproof digital temperature sensor is adopted, the measurement precision is +/-0.1 ℃, and the sampling frequency is 1 sample/min; the surface temperature monitoring device adopts an infrared thermal imaging array, a single node covers a 10m multiplied by 10m area, the measurement precision is +/-0.5 ℃, and the sampling frequency is 1 sample/5 minutes; humidity sensor network, arranging capacitance humidity sensors according to 10m x 10m grids with accuracy + -2% ; Stress strain sensor, fiber bragg grating strain sensor is adopted, and measuring range is +/-1500 Resolution 1 ; And the environmental parameter sensor is used for monitoring wind speed, solar radiation and environmental temperature and humidity parameters.
3. A curing compensation system based on the rate of change of the temperature and humidity of bulk concrete as claimed in claim 2, wherein: the data processing and analyzing module comprises: A change rate calculation unit that calculates a temperature and humidity change rate based on the time-series data; the prediction control unit predicts the concrete cracking risk based on the change rate trend; the multi-parameter coupling analysis unit is used for carrying out risk assessment by integrating temperature, humidity, stress and environmental parameters; And the self-adaptive decision unit is used for generating a control strategy according to the concrete age and the risk level.
4. The curing compensation system based on the temperature and humidity change rate of the mass concrete according to claim 3, wherein the change rate calculating unit specifically performs the following steps when calculating the temperature change rate: in a preset time window In, to the acquired temperature data sequence A corresponding point in time Performing linear regression fitting by adopting a least square method to obtain a fitting straight line Slope of the straight line As a rate of temperature change The calculation formula is as follows: Rate of humidity change The determination is performed in the same way, namely: Wherein: presetting the total number of data points in a time window; time window of the first time A time stamp of the data point; time window of the first time Temperature measurements of data points; time window of the first time Humidity measurements of data points.
5. The curing compensation system based on the rate of change of temperature and humidity of bulk concrete as set forth in claim 4, wherein said predictive control unit includes an early warning algorithm that calculates a composite risk score based on the rate of change of temperature and the rate of change of humidity To trigger the early warning of different grades, the calculation formula is as follows: Wherein temperature risk score And humidity risk score The calculation logic of (1) is as follows: , 。
6. The maintenance compensation system based on the temperature and humidity change rate of the bulk concrete according to claim 5, wherein the multi-parameter coupling analysis unit calculates a total risk value through a weighted summation model To guide the generation of the control strategy, the calculation formula is as follows: Wherein: The total risk score of comprehensive evaluation is normalized to the [0,1] interval; 、、、 respectively scoring the temperature risk, the humidity risk, the stress risk and the environmental risk after normalization treatment; 、、、 The weight factors corresponding to the temperature risk, the humidity risk, the stress risk and the environmental risk after the normalization treatment are respectively set according to the influence degree on the concrete cracking, and ; The optimal control strategy generation of the multi-parameter coupling analysis unit adopts a rule-based decision mechanism: When (when) Starting an enhanced cooling strategy when the temperature gradient is greater than 0.7, wherein the control intensity is in direct proportion to the risk value, and the temperature gradient is less than 1 ℃ per hour; When (when) When the humidity is greater than 0.6, starting a humidity compensation strategy, and adopting an atomization humidification mode, wherein the target relative humidity is not lower than 95%; When (when) At > 0.8, a stress relief strategy is initiated, including a combination of measures to cover insulation, reduce ventilation, and adjust the maintenance regimen.
7. The maintenance compensation system based on the mass concrete temperature and humidity change rate according to claim 6, wherein the self-adaptive decision unit adopts a self-adaptive PID controller, PID parameters of the self-adaptive decision unit can be dynamically adjusted according to concrete age and system response characteristics, and an output calculation formula of the PID controller is as follows: Wherein: First of all Control output quantity at each sampling moment; First of all The error values at the individual sampling instants, Wherein Is set to be the set value, Is a process variable measurement; Starting operation from the controller to the current time Any one of the historical sampling moments Error values of (2); Sampling time interval of the system; 、、 The ratio, integral and differential coefficients are respectively; the PID parameter self-adaptive adjustment strategy comprises the following steps: Based on concrete age According to the segment adjustment of (2) The early, middle and late stages are 、、 Giving different preset value groups; Based on the error history variance Fine tuning of (1) calculating the latest Variance of individual error points When (when) When the threshold value is greater than the first threshold value, the method reduces Value to suppress oscillations when When the threshold value is smaller than the second threshold value, the process is increased Values to increase the response speed.
8. The maintenance compensation system based on the rate of change of the temperature and humidity of the bulk concrete according to claim 7, wherein: the actuator module includes: a. The intelligent spraying system, according to humiture change rate automatically regulated spray intensity and scope, the intelligent spraying system includes: a1, arranging matrix type nozzles, wherein the density of the nozzles is 1/2-6 m < 2 >; a2, adjusting an electromagnetic valve by PID, and accurately controlling water flow; a3, a constant-temperature heating device is used for adjusting the spray water temperature; a4, a partition control function is adopted, and differential spraying is realized according to the temperature cloud picture; b. an automatic covering system for automatically spreading or recovering a thermal insulation material according to a temperature gradient, the automatic covering system comprising: b1, combining multiple layers of materials, including geotextile, plastic films and heat-insulating quilts; b2, an electric winch mechanism realizes automatic spreading and recovery; b3, a position sensor accurately locates the covering position; b4, automatically selecting covering materials and coverage areas according to the temperature gradient; c. and the ventilation regulation and control system automatically regulates the ventilation intensity and direction according to the environmental conditions.
9. The maintenance compensation system based on the rate of change of the temperature and humidity of the bulk concrete according to claim 8, wherein: the bim+iot fusion platform includes: The three-dimensional temperature cloud picture display module displays the temperature distribution of the concrete in real time; the risk thermodynamic diagram generation module is used for generating a risk distribution diagram based on multi-parameter evaluation; the real-time data curve module displays the change trend of the key parameters; The early warning information management module is used for issuing early warning information in a grading manner; and the control state monitoring module is used for displaying the state of the execution equipment in real time.
10. The curing compensation system of claim 9 wherein the combination of multiple layers of material in b1 comprises a multiple layer composite web mechanism comprising: The multi-component brush comprises a central fixing seat (1), wherein the upper surface of a base of the central fixing seat (1) is fixedly connected with a base (11), and the inner surface of one end of the base (11) is rotationally connected with a multi-component brush roll (12); The three-layer independent reel (2) is sequentially and rotatably connected to the inner surface of the center fixing seat (1) from top to bottom, is respectively driven by three independent driving motors (21) and is used for respectively winding geotechnical cloth, plastic films and heat preservation cotton quilts, the outer surfaces of reels of the three reels (2) are respectively rotatably connected with a supporting plate (22), the outer surfaces of reels of the reels (2) are fixedly sleeved with a ratchet wheel (23), one side surface of the supporting plate (22) is respectively rotatably connected with a pawl (24) and a servo motor (25) for driving the pawl (24) to rotate, the upper surface of the pawl (24) is fixedly contacted with a compression spring (26), and the free ends of the compression springs (26) are fixedly connected to the lower surface of an extension plate of the supporting plate (22); The material outlet guide (3) is arranged in front of the discharging direction of the reel (2) and is used for guiding materials selected from at least one reel (2) to the surface of concrete, wherein the material outlet guide (3) comprises a different-shape supporting hole plate (31) fixedly connected to one side surface of the reel (2), a rectangular frame (32) is fixedly connected to one side surface of the supporting hole plate (31), a through hole of the rectangular frame (32) is fixedly communicated with a through hole of the supporting hole plate (31), guide rollers (33) are respectively connected to the inner top surface and the inner surfaces of two sides of the rectangular frame (32) in a rotating mode, U-shaped brackets (34) are sleeved on the outer surfaces of the guide rollers (33) on two sides in a sliding mode, extrusion rollers (35) are connected to the inner surfaces of the brackets (34) in a rotating mode, a rotating motor (36) is fixedly connected to the inner bottom surface of each bracket (34), a driving swing arm (37) is fixedly connected to the outer surface of an output shaft of each rotating motor (36), a driven connecting rod (38) is hinged to the lower surface of each bracket (34), and the free end of each driven connecting rod (38) is hinged to the free end of each swing arm (37); The hot press roller (4) carries out hot press bonding to the coiled material of two kinds or more than two kinds, guide way (41) have been seted up to the other end internal surface of base (11) be symmetrical distribution, the internal surface of guide way (41) is connected with bi-directional adjustment screw (42) through the bearing rotation, threaded tube piece (43) have been cup jointed to the upper and lower extreme surface of bi-directional adjustment screw (42) respectively to the screw thread, two the roller of hot press roller (4) respectively through the bearing with correspond one side surface rotation of threaded tube piece (43) is connected, two the roller surface of hot press roller (4) has fixedly cup jointed driven gear (44) respectively, wherein two one side surface of threaded tube piece (43) is fixedly connected with gear motor (45) respectively, the output shaft external surface fixedly connected with driving gear (46) of gear motor (45), driving gear (46) with driven gear (44) meshing.

Description

Maintenance compensation system based on mass concrete temperature and humidity change rate Technical Field The invention relates to the technical field of construction and maintenance of constructional engineering, in particular to a maintenance compensation system based on the temperature and humidity change rate of mass concrete. Background Large-volume concrete structures, such as large foundations, hydraulic dams, bridge piers and the like, release a large amount of heat during the cement hydration process. Due to the poor thermal conductivity of concrete, internal heat accumulation results in a significant temperature rise, while the surface dissipates heat faster, creating a large temperature gradient between the interior of the structure and the surface, as well as different areas. When the temperature stress caused by the uneven temperature exceeds the early tensile strength of the concrete, harmful cracks are easily generated, the integrity, durability and safety of the structure are seriously affected, in addition, plastic shrinkage and drying shrinkage can be caused by too fast evaporation of early water in the concrete, and if the concrete is not maintained properly in a moisturizing way, surface cracks can be induced. Therefore, timely and effective temperature and humidity maintenance of mass concrete is a key for controlling cracking risk. At present, the common mass concrete curing method in engineering is mostly dependent on traditional means and experience judgment, and mainly has the following limitations: Traditional monitoring means generally depend on single-point and discrete sensors, and are difficult to comprehensively and truly reflect complex three-dimensional temperature fields, humidity fields and stress fields in large-volume concrete. The method is characterized in that the data processing is always stopped at the simple monitoring of single parameters, the lack of deep analysis and comprehensive risk assessment of multi-parameter coupling effect leads to insufficient scientificity of maintenance decision and incapability of realizing accurate regulation, the maintenance management is often stopped at the paper recording or simple data report stage, and monitoring data, BIM (building information modeling) and the state of maintenance execution equipment cannot be subjected to deep fusion and visual display, so that early accurate positioning of risks, rapid pushing of early warning information and remote intelligent scheduling of execution process cannot be realized, the management efficiency is low, the prior art mainly adopts a threshold alarming mechanism, namely, the maintenance measures are triggered after the monitored temperature or humidity value exceeds a preset fixed threshold, so that early warning and intervention cannot be performed at the early stage of adverse trend change of a temperature and humidity field in concrete, and the optimal time for controlling crack development is often missed, and the method solves the defects of the technical problems. Disclosure of Invention Based on the prior technical problems, the invention provides a maintenance compensation system based on the temperature and humidity change rate of mass concrete. The invention provides a maintenance compensation system based on a mass concrete temperature and humidity change rate, which comprises: and the sensor network module is used for collecting temperature data, humidity data and stress data of the interior and the surface of the mass concrete in real time. The data processing and analyzing module is connected with the sensor network and is used for receiving and processing the acquired data, calculating the change rate of temperature and humidity, performing risk assessment according to the change rate and generating a self-adaptive control strategy. And the execution mechanism module is connected with the data processing and analyzing module and is used for receiving and executing the control strategy so as to adjust the temperature and humidity environment of the concrete. And the BIM+iot fusion platform integrates sensor data, BIM model information and environment data and provides visual monitoring, risk early warning and decision support functions. Preferably, the sensor network module includes: The embedded temperature sensors are arranged in the concrete in layers according to the depths of 0.1m, 0.5m, 1.0m, 1.5m and 2.0m, and the DS18B20 waterproof digital temperature sensor is adopted, so that the measurement precision is +/-0.1 ℃ and the sampling frequency is 1 sample/min. The surface temperature monitoring device adopts an infrared thermal imaging array, a single node covers a 10m multiplied by 10m area, the measurement precision is +/-0.5 ℃, and the sampling frequency is 1 sample/5 min. Humidity sensor network, arranging capacitance humidity sensors according to 10m x 10m grids with accuracy + -2%。 Stress strain sensor, fiber bragg grating strain sensor is adopted, and m