CN-122024949-A - Temperature control and anti-cracking integrated system and method for mass concrete construction

CN122024949ACN 122024949 ACN122024949 ACN 122024949ACN-122024949-A

Abstract

The invention discloses a mass concrete construction temperature control anti-cracking integrated system and method, wherein the mass concrete construction temperature control anti-cracking integrated system comprises a construction module, a monitoring module, a comparison module and an execution module, wherein the construction module is used for constructing a cooling water pipe fine model based on concrete thermodynamic parameters and construction working conditions, solving a heat flow coupling control equation through a heat flow coupling algorithm, determining a concrete internal temperature field and stress field distribution cloud chart, the monitoring module is used for collecting concrete attribute data, the comparison module is used for comparing the attribute data with the concrete internal temperature field and stress field distribution cloud chart, correcting model parameters of the heat flow coupling model according to comparison results, generating a regulation and control instruction and sending the regulation and control instruction to the execution module, and the execution module is used for receiving and executing the regulation and control instruction, wherein the regulation and control instruction comprises at least one of temperature regulation and pouring time sequence optimization. And the prediction of the temperature field and the stress field is accurately carried out, the complex construction working conditions are matched, the mechanical and thermal state changes of the concrete full life cycle are captured in real time, the temperature control adjustment is effectively carried out, and the construction quality is improved.

Inventors

QIAN WENWEN
XIE XIN
ZHU CHENGWU
HUANG JINGXIN
QUAN XIN
WANG JIXIANG
SU WEI

Assignees

中铁四局集团有限公司
中铁四局集团市政工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260113

Claims (10)

1. The utility model provides a bulky concrete construction control by temperature change anticracking integration system which characterized in that includes: the construction module is used for constructing a cooling water pipe fine model based on the thermodynamic parameters of the concrete and the construction working conditions, solving a heat flow coupling control equation through a heat flow coupling algorithm, and determining a concrete internal temperature field and stress field distribution cloud picture; The monitoring module is used for collecting attribute data of the concrete; The comparison module is used for comparing the attribute data with the internal temperature field and stress field distribution cloud pictures of the concrete, correcting the model parameters of the heat flow coupling model according to the comparison result, generating a regulation and control instruction and sending the regulation and control instruction to the execution module; The system comprises an execution module, a control module and a control module, wherein the execution module is used for receiving and executing a control instruction, and the control instruction comprises at least one of temperature adjustment and pouring time sequence optimization.
2. The integrated system for controlling and preventing cracking of mass concrete construction temperature according to claim 1, wherein the construction module comprises: The acquisition module is used for acquiring thermal physical parameters of concrete raw materials, a hydration heat release rate curve and aggregate grading distribution data and constructing a concrete microscopic structure model based on a random aggregate generation algorithm; The building module is used for acquiring the cooling water pipe arrangement parameters and the water supply initial parameters, inputting the parameters into the concrete microstructure model, and building a cooling water pipe fine model containing the water pipe-concrete interface heat transfer resistance; and the solving module is used for solving a heat flow coupling control equation included in the cooling water pipe fine model through a heat flow coupling algorithm and outputting concrete internal temperature fields and stress field distribution cloud pictures in different construction stages.
3. The integrated system for controlling and preventing cracking of mass concrete construction temperature according to claim 2, wherein the heat flow coupling control equation is: ; Wherein, the Is the density of the concrete; specific heat capacity of concrete; is the temperature of the concrete; Time is; In the case of a heat conduction term, Is a gradient operator; Is a divergence operator; Is the heat conductivity coefficient of the concrete; Is the hydration heat release rate of the concrete; Is the thermal expansion coefficient of the concrete; is the porosity of the concrete; Is the pore water pressure inside the concrete.
4. The integrated system for controlling and preventing cracking of mass concrete construction temperature according to claim 1, wherein the monitoring module comprises: The temperature monitoring module is arranged along the concrete pouring height direction and is used for collecting temperature data of the concrete; the stress monitoring module is arranged at the centroid and the edge part of the concrete section and is used for collecting stress data of the concrete; the humidity monitoring module is arranged on the surface and inside of the concrete and is used for collecting humidity data of the concrete; and the first determining module is used for determining the attribute data of the concrete according to the temperature data, the stress data and the humidity data.
5. The integrated system of temperature control and crack control for mass concrete construction of claim 4, wherein the monitoring module further comprises a micro-strain sensing module arranged at the joint part of the concrete and at the embedded bars for monitoring shrinkage strain of the concrete and constraint strain of the bars, and triggering the constraint release regulation and control instruction when the strain difference between the shrinkage strain of the concrete and the constraint strain of the bars is greater than a preset difference threshold.
6. The integrated system for controlling and preventing cracking in mass concrete construction according to claim 4, wherein the comparison module comprises: the data processing module is used for removing random noise in the temperature data and the stress data through a Kalman filtering algorithm, and supplementing the missing data by adopting a linear interpolation method to obtain preprocessed data; A correction module for: comparing the temperature data in the preprocessed data with the temperature field to obtain a first deviation parameter; comparing the stress data in the pretreatment data with a stress field distribution cloud image to obtain a second deviation parameter; when the first deviation parameter is larger than the first deviation threshold value and/or the second deviation parameter is larger than the second deviation threshold value, correcting model parameters of the heat flow coupling model through a Bayesian optimization algorithm; The first generation module is used for determining target data based on the corrected heat flow coupling model, generating a hierarchical regulation and control instruction according to the target data and a preset database and sending the hierarchical regulation and control instruction to the execution module.
7. The integrated system for controlling and preventing cracking of mass concrete construction temperature according to claim 1, wherein the execution module comprises: the receiving module is used for receiving the regulation and control instruction; The temperature adjusting module is used for adjusting the temperature of the concrete; And the optimizing module is used for carrying out pouring time sequence optimizing treatment on the concrete.
8. The integrated system for controlling and preventing cracking of mass concrete construction temperature according to claim 7, wherein the temperature adjusting module comprises: The phase-change heat-preservation template comprises a phase-change material encapsulated in a hollow template, wherein a heat-conduction enhancement layer is arranged on the inner side of the template, and a heat-preservation heat-insulation layer is arranged on the outer side of the template; the second determining module is used for releasing latent heat through solidification phase change of the phase change material when the temperature data of the concrete is determined to be smaller than the first phase change temperature, conducting heat to the surface of the concrete through the heat conduction reinforcing layer, and melting the phase change material to absorb heat when the temperature data of the concrete is determined to be larger than the second phase change temperature.
9. The integrated mass concrete construction temperature control and crack control system of claim 7, wherein the optimization module comprises: The acquisition module is used for acquiring meteorological data of a future period and determining a proper pouring period and a limited pouring period by combining a concrete hydration heat temperature rise prediction result; The setting module is used for setting constraint conditions according to the maximum temperature rise value inside the concrete and the internal and external temperature difference, and optimizing the thickness of the pouring layer and the pouring interval time; The second generation module is used for pouring based on the thickness of the pouring layer and the pouring interval time in a proper pouring period, and in the pouring process, when the ambient temperature is greater than a preset temperature threshold value, the pouring sequence is automatically adjusted, and the shadow area is poured preferentially.
10. The construction temperature control and anti-cracking integrated method of the large-volume concrete construction temperature control and anti-cracking integrated system according to any one of claims 1 to 9, comprising: Constructing a cooling water pipe fine model based on thermodynamic parameters of the concrete and construction working conditions, solving a heat flow coupling control equation through a heat flow coupling algorithm, and determining a concrete internal temperature field and stress field distribution cloud picture; collecting attribute data of concrete; Comparing the attribute data with a concrete internal temperature field and stress field distribution cloud image, correcting model parameters of a heat flow coupling model according to the comparison result, generating a regulation and control instruction and sending the regulation and control instruction to an execution module; the execution module receives and executes the regulation and control instruction, wherein the regulation and control instruction comprises at least one of temperature regulation and pouring time sequence optimization.

Description

Temperature control and anti-cracking integrated system and method for mass concrete construction Technical Field The invention relates to the technical field of concrete construction temperature control, in particular to a temperature control and crack prevention integrated system and method for mass concrete construction. Background The large-volume concrete is easy to form obvious temperature gradient between the inside and the surface due to concentrated release of hydration heat, so that temperature stress is generated, and the concrete is a core cause of crack initiation and expansion in engineering. In the prior art, the temperature control anti-cracking scheme mostly adopts a cooling water pipe layout and passive heat preservation separation strategy, the prediction precision of a temperature field and a stress field is low, complex construction working conditions are difficult to match, the mechanical and thermal state changes of the concrete full life cycle cannot be captured in real time, the temperature control adjustment cannot be effectively carried out, and the construction quality is poor. Disclosure of Invention The present invention aims to solve, at least to some extent, one of the technical problems in the above-described technology. Therefore, the invention aims to provide a temperature control and crack prevention integrated system and method for large-volume concrete construction, which can accurately predict a temperature field and a stress field, match complex construction working conditions, capture the mechanical and thermal state changes of the whole life cycle of the concrete in real time, effectively perform temperature control and adjustment, and improve the construction quality. In order to achieve the above purpose, the embodiment of the invention provides a temperature control and anti-cracking integrated system for mass concrete construction, which comprises: the construction module is used for constructing a cooling water pipe fine model based on the thermodynamic parameters of the concrete and the construction working conditions, solving a heat flow coupling control equation through a heat flow coupling algorithm, and determining a concrete internal temperature field and stress field distribution cloud picture; The monitoring module is used for collecting attribute data of the concrete; The comparison module is used for comparing the attribute data with the internal temperature field and stress field distribution cloud pictures of the concrete, correcting the model parameters of the heat flow coupling model according to the comparison result, generating a regulation and control instruction and sending the regulation and control instruction to the execution module; The system comprises an execution module, a control module and a control module, wherein the execution module is used for receiving and executing a control instruction, and the control instruction comprises at least one of temperature adjustment and pouring time sequence optimization. According to some embodiments of the invention, a building block comprises: The acquisition module is used for acquiring thermal physical parameters of concrete raw materials, a hydration heat release rate curve and aggregate grading distribution data and constructing a concrete microscopic structure model based on a random aggregate generation algorithm; The building module is used for acquiring the cooling water pipe arrangement parameters and the water supply initial parameters, inputting the parameters into the concrete microstructure model, and building a cooling water pipe fine model containing the water pipe-concrete interface heat transfer resistance; and the solving module is used for solving a heat flow coupling control equation included in the cooling water pipe fine model through a heat flow coupling algorithm and outputting concrete internal temperature fields and stress field distribution cloud pictures in different construction stages. According to some embodiments of the invention, the thermal flow coupling control equation is: ; Wherein, the Is the density of the concrete; specific heat capacity of concrete; is the temperature of the concrete; Time is; In the case of a heat conduction term, Is a gradient operator; Is a divergence operator; Is the heat conductivity coefficient of the concrete; Is the hydration heat release rate of the concrete; Is the thermal expansion coefficient of the concrete; is the porosity of the concrete; Is the pore water pressure inside the concrete. According to some embodiments of the invention, a monitoring module comprises: The temperature monitoring module is arranged along the concrete pouring height direction and is used for collecting temperature data of the concrete; the stress monitoring module is arranged at the centroid and the edge part of the concrete section and is used for collecting stress data of the concrete; the humidity monitoring module is arranged on the su