Radiant heating floor anti-cracking construction method based on crack prediction
By using BIM 3D simulation and crack prediction models, combined with isolation strips, expansion joints, and induced joints, the construction of radiant heating floors was optimized. This solved the problem of relying on experience for crack prevention measures, and achieved efficient and controllable crack prediction and construction optimization, thereby improving the crack resistance and structural strength of radiant heating floors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA HYDROPOWER ELEVENTH ENG BUREAU (ZHENGZHOU) CO LTD
- Filing Date
- 2026-01-14
- Publication Date
- 2026-06-09
AI Technical Summary
Current anti-crack measures in radiant floor heating construction rely on experience and lack forward-looking knowledge, making it difficult to predict and control crack risks, resulting in mismatched construction and disorderly cracking.
By using BIM to simulate the pipeline layout in three dimensions, isolation zones and expansion joints are set up, a crack prediction model is constructed, a risk heat map is generated, and expansion joints and induced joints are set up in high-risk areas. Combined with steel mesh and flexible sleeves, the construction process is optimized.
It significantly reduces the incidence of floor cracks, improves structural strength and durability, shortens the construction cycle, reduces costs, and enhances the level of construction standardization.
Smart Images
Figure CN122175050A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of building energy conservation technology, specifically relating to a construction method for preventing cracking of radiant heating floors based on crack prediction. Background Technology
[0002] With the development of building energy-saving technology, radiant floor heating systems have been widely used in residential and public buildings due to their good thermal comfort and high energy efficiency. These buildings usually require the laying of radiant heating pipes in the floor structure layer, and then pouring a concrete filling layer or protective layer on top to achieve uniform heating of the indoor space. However, during the long-term operation of radiant floor heating, the floor filling layer or protective layer is prone to cracks due to the drying shrinkage and wet expansion of concrete materials and the repeated temperature changes during the start and stop of heating. The appearance of these cracks not only affects the performance and aesthetics of the floor, but may also cause problems such as pipe leakage, heat loss and reduced structural durability.
[0003] To address the aforementioned issues, existing technologies typically release or disperse stress in the floor structure by setting up isolation strips, expansion joints, separation joints, steel mesh, or fiber-reinforced materials to reduce the probability of crack formation. Some construction methods also improve the overall mechanical properties of the floor by controlling the concrete mix ratio and optimizing pouring and curing processes. These technical solutions can alleviate floor cracking to some extent, but their anti-cracking effect still has considerable uncertainty in actual engineering projects. Moreover, existing anti-cracking construction methods for radiant heating floors mostly rely on construction experience or general specifications for the layout of anti-cracking measures. The location, spacing, and form of expansion joints or separation joints are usually fixed or empirically set, making it difficult to adjust for differences in material properties, environmental parameters, and heating operation characteristics under different engineering conditions. Furthermore, since the occurrence of floor cracks has obvious regional and random characteristics, existing technologies cannot identify high-risk crack areas in advance during the construction phase, nor can they quantitatively predict the possible location and width of cracks. This leads to a mismatch between anti-cracking measures and actual crack risk, inevitably resulting in disordered cracking or through cracks.
[0004] Therefore, there is an urgent need for a construction method that can predict the risk of cracking during the construction phase of radiant heating floor and proactively guide the setting of anti-cracking construction measures based on the prediction results. This method would solve the problems in existing anti-cracking construction technologies for radiant heating floors, such as reliance on experience for anti-cracking measures, lack of forward-looking understanding of crack risks, disconnect between construction decisions and crack evolution behavior, and difficulty in achieving predictability, controllability, and repeatability of the anti-cracking process. Summary of the Invention
[0005] In view of this, the present invention proposes a crack-prediction-based construction method for preventing cracking in radiant heating floors. This method is applied to the field of building energy conservation technology and solves the existing technical problems of crack prevention measures relying on experience, lacking forward-looking understanding of crack risks, disconnect between construction decisions and crack evolution behavior, and difficulty in achieving predictable, controllable and repeatable crack prevention processes.
[0006] To achieve the above-mentioned technical objectives, the specific technical solution adopted by the present invention is as follows: A method for preventing cracking in radiant heating floor systems based on crack prediction includes the following steps: S1. Perform three-dimensional pre-layout of radiant heating pipes and other water supply pipes in radiant floor heating to determine the pipe direction, elevation and spacing; S2. Set up an isolation zone around the perimeter of the radiant heating floor and set an expansion joint in the middle of the floor; S3. Construct a crack prediction model to predict the risk of cracks in radiant heating floors and output the prediction results; S4. Based on the prediction results, expansion joints and induction joints are set in the radiant heating floor; S5. Proceed sequentially with the laying of the insulation layer, installation of the radiant heating pipes, laying of the steel mesh, concrete pouring and curing to complete the construction of the radiant heating floor.
[0007] Furthermore, in step S1, a three-dimensional simulation of the radiant heating pipes and other water supply pipes is performed using BIM to determine the spatial relationship between the radiant heating pipes and other water supply pipes in the radiant heating floor structure, so as to avoid uneven thickness of the floor filling layer caused by the intersection or overlap of the radiant heating pipes and other water supply pipes.
[0008] Furthermore, in step S2, high-density polyethylene foam is pasted around the perimeter of the radiant heating floor to form a continuous insulating strip, which is combined with an expansion joint located in the middle of the floor to absorb the thermal expansion stress generated during the operation of the radiant heating system.
[0009] Furthermore, step S3 includes the following steps: S301. Collect material performance parameters, environmental condition parameters, construction parameters, and heating operation parameters related to the formation of cracks in radiant heating floors; S302. Perform data preprocessing on the collected data, including missing value imputation, outlier removal, and unitization; S303. The data are feature-filtered by correlation analysis, variance screening and collinearity detection, and the parameter factors that are significantly related to crack formation are retained. S304. Establish a crack prediction model based on the screened parameters; S305. Train and validate the crack prediction model; S306. Output crack prediction results for radiant heating floors based on a validated crack prediction model.
[0010] Furthermore, in step S304, the model parameters of the crack prediction model are constrained by introducing an L2 regularization term to reduce the risk of overfitting and improve the prediction stability.
[0011] Furthermore, in step S305, the regularization parameter in the crack prediction model is optimized through cross-validation to ensure that the crack prediction model has stable prediction performance under different data samples.
[0012] Furthermore, in step S306, a crack risk heat map is generated based on the crack occurrence probability and crack width range to identify high-risk crack areas in radiant heating floors.
[0013] Furthermore, in step S4, based on the crack risk heat map, expansion joints penetrating the ground structure layer are set in high-risk crack areas, and induction joints are formed on the surface of the concrete filling layer to guide the cracks.
[0014] Furthermore, the induced joint is a V-shaped induced joint, and after the concrete hardens, the V-shaped induced joint is filled with a flexible sealing material.
[0015] Furthermore, in step S5, after laying the insulation layer, the radiant heating pipe is fixed on the insulation layer, a flexible sleeve is installed at the location where the pipe crosses the expansion joint, and a steel mesh is laid on it before concrete pouring and curing.
[0016] By adopting the above technical solution, the present invention can also bring the following beneficial effects: 1. This invention discloses a crack prevention construction method for radiant heating floors based on crack prediction. By systematically controlling the construction process and combining pipeline pre-layout, crack prediction, and floor structure treatment, the crack prevention performance of radiant heating floors can be significantly improved. The crack incidence rate of the treated floor is reduced by about 70% compared with traditional construction methods. The prediction results of the crack prediction model have a high degree of consistency with the actual crack situation, and its prediction determination coefficient R² reaches 0.87, indicating that the crack prediction results have high accuracy and reliability, and have the advantages of significant crack prevention effect and predictable crack risk.
[0017] 2. This invention mentions a crack prediction-based construction method for preventing cracking in radiant heating floors. Through the coordinated optimization of the floor structure and key construction links, the structural strength and durability of the radiant heating floor can be effectively improved. The flexural strength of the treated floor is increased by about 35% at 28 days, and no through cracks appear after one heating season of continuous operation. It can meet the requirements for long-term stable operation of radiant heating floors and has the advantages of high structural strength and good durability.
[0018] 3. This invention proposes a crack prediction-based construction method for preventing cracking in radiant heating floors. While ensuring construction quality and structural performance, it helps optimize construction organization and processes, shortening the overall construction cycle by about 10% and reducing comprehensive construction costs by about 8%. It can be widely used in radiant floor heating systems for residential, public, and commercial buildings. Furthermore, by constructing a comprehensive crack prevention construction technology system consisting of pre-layout of pipelines, crack prediction, and induced joint setting, it significantly reduces the risk of floor cracks, improves the level of construction standardization, and has the advantages of short construction cycle, low comprehensive cost, and strong engineering applicability. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments 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.
[0020] Figure 1 This is a flowchart of a method for preventing cracking of radiant heating floor based on crack prediction, as mentioned in this invention. Figure 2 This is a three-dimensional pre-layout diagram of the pipelines in the radiant floor heating system in this embodiment; Figure 3 This is a cross-sectional view of the V-shaped induced joint in this embodiment; Figure 4 This is a schematic diagram of the connection structure between the roller assembly and the reinforcing frame in this embodiment; In the diagram: 1. Radiant heating pipe; 2. Water supply pipe; 3. V-shaped groove. Detailed Implementation
[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0022] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0023] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.
[0024] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0025] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details. Example 1:
[0026] like Figure 1 As shown, the present invention provides a method for preventing cracking of radiant heating floor radiant heating based on crack prediction, comprising the following steps: S001. Perform three-dimensional pipeline pre-layout; In this embodiment, based on the building floor plan, water supply and drainage design drawings and heating design drawings, the water supply pipe 2 and radiant heating pipe 1 in the radiant heating floor are simulated and pre-arranged in three dimensions using BIM to determine the direction, elevation and spacing of the water supply pipe 2 and radiant heating pipe 1, so as to avoid the intersection or overlap between different pipes and thus prevent uneven thickness of the floor filling layer.
[0027] like Figure 2 The diagram shows a three-dimensional pre-layout of pipelines in a radiant heating floor. The diagram illustrates the direction, elevation, and spacing of the radiant heating pipe 1 and other water supply pipes 2 in the floor structure. The three-dimensional pre-layout method avoids intersections or overlaps between different pipes, thereby ensuring the uniformity of the floor filling layer.
[0028] S002. Install isolation strips and expansion joints; After completing the three-dimensional pipe pre-layout, the base layer of the radiant heating floor is treated to meet the requirements of subsequent construction.
[0029] High-density polyethylene foam with a thickness of not less than 10mm is pasted at the corners of the walls around the radiant heating floor to form a continuous perimeter isolation zone; at the same time, polystyrene board expansion joints are set in the middle of the floor to absorb the thermal expansion stress generated during the operation of radiant heating and to meet the thermal expansion requirements of the floor.
[0030] S003. Construct a crack prediction model and conduct a risk assessment; Subsequently, a crack prediction model was established. First, material performance parameters, environmental condition parameters, construction parameters, and heating operation parameters related to the formation of cracks in radiant heating floors were collected. Among them, material performance parameters included concrete shrinkage rate, environmental condition parameters included ambient temperature and ambient humidity, heating operation parameters included heating temperature rise curve, and construction parameters included construction time.
[0031] The collected data underwent missing value imputation, outlier removal, and dimensional unification to ensure consistency of different parameters during the modeling process. Subsequently, the parameters were feature-selected through correlation analysis, variance screening, and collinearity detection, retaining parameter factors that are significantly related to crack formation.
[0032] Based on the selected parameters, a ridge regression crack prediction model with L2 regularization was established. The regularization parameter was optimized by cross-validation. The mean squared error (MSE) and coefficient of determination (R²) were used to evaluate the model's predictive performance.
[0033] Using a trained and validated crack prediction model, the occurrence of cracks in different areas of radiant heating floors is predicted, and the probability of crack occurrence and the crack width range are output. A crack risk heat map is also generated. The crack risk heat map is used to identify high-risk areas of ground cracks during the construction phase and serves as a reference for setting expansion joints and determining the maintenance frequency.
[0034] like Figure 3 The diagram shown is a flowchart of the crack prediction model, including the following specific contents: S301. Collect material performance parameters, environmental condition parameters, construction parameters, and heating operation parameters related to the formation of cracks in radiant heating floors; S302. Perform data preprocessing on the collected data, including missing value imputation, outlier removal, and unitization; S303. The data are feature-filtered by correlation analysis, variance screening and collinearity detection, and the parameter factors that are significantly related to crack formation are retained. S304. Establish a crack prediction model based on the screened parameters; S305. Train and validate the crack prediction model; S306. Based on the validated crack prediction model, output the crack prediction results of radiant heating floor to realize the prediction and analysis of crack risk of radiant heating floor. The above process clarifies the construction process and prediction logic of the crack prediction model, demonstrating that the model can analyze the crack risk of radiant heating floors based on multi-source parameters, providing a basis for structural treatment in subsequent construction phases.
[0035] S004. Install expansion joints and guide joints; Based on the crack prediction results, expansion joints that run through the upper and lower structural layers are set in areas with a high risk of cracking.
[0036] Before the concrete sets, V-shaped grooves 3 are drawn on the surface of the concrete filler layer along the weak path location determined by the crack prediction model to form induced cracks. After the concrete hardens, polyurethane sealant is filled into the V-shaped grooves 3. The induced cracks are arranged in a grid pattern according to the crack prediction results to hide and guide the micro-cracks that inevitably occur.
[0037] like Figure 4The diagram shows the structure of expansion joints and induced joints in a radiant floor heating system. The diagram shows the location of the expansion joints in the floor structure and the V-shaped induced joint structure formed on the surface of the concrete filling layer. The induced joint is filled with flexible sealing material. The way the expansion joints and induced joints are set up allows the floor structure to release thermal expansion stress during operation and guides and controls cracks, thereby reducing the adverse effects of cracks on the overall floor structure.
[0038] S005. Carry out ground structure construction and maintenance; Lay 20mm thick extruded polystyrene insulation boards on the base layer and seal the joints with tape; then lay aluminum foil reflective film on the insulation boards.
[0039] Fix the PE-RT radiant heating pipes to the insulation layer according to the design requirements, and appropriately increase the spacing at pipe bends; when the radiant heating pipe 1 crosses the expansion joint, install a flexible sleeve at the corresponding position.
[0040] Subsequently, a steel mesh with a specification of 100mm×100mm and a diameter of Φ4 is laid in the radiant heating floor. The steel mesh is laid in sections at the expansion joints and then tied and fixed. The overlap length of the steel mesh is not less than 10cm.
[0041] After the steel mesh is laid, pour a layer of gravel concrete with a thickness of not less than 50mm and smooth the concrete surface.
[0042] After the concrete fill layer is poured, cover it and keep the surface moist for at least 7 days. During the curing period, regularly moisten the concrete fill layer to ensure that it is fully hydrated and prevent early drying shrinkage cracking.
[0043] In summary, this invention can predict and control the risk of ground cracks while meeting the construction requirements of radiant heating structures. It has the advantages of clear construction process, reasonable pipeline layout, strong crack control, and good structural adaptability.
[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. A method for preventing cracking in radiant heating floor systems based on crack prediction, characterized in that, Includes the following steps: S1. Perform three-dimensional pre-layout of radiant heating pipes and other water supply pipes in radiant floor heating to determine the pipe direction, elevation and spacing; S2. Set up an isolation zone around the perimeter of the radiant heating floor and set an expansion joint in the middle of the floor; S3. Construct a crack prediction model to predict the risk of cracks in radiant heating floors and output the prediction results; S4. Based on the prediction results, expansion joints and induction joints are set in the radiant heating floor; S5. Proceed sequentially with the laying of the insulation layer, installation of the radiant heating pipes, laying of the steel mesh, concrete pouring and curing to complete the construction of the radiant heating floor.
2. The method for preventing cracking of radiant heating floor radiant heating based on crack prediction according to claim 1, characterized in that: In step S1, BIM is used to perform a three-dimensional simulation of the radiant heating pipes and other water supply pipes to determine the spatial relationship between the radiant heating pipes and other water supply pipes in the radiant heating floor structure, so as to avoid uneven thickness of the floor filling layer caused by the intersection or overlap of the radiant heating pipes and other water supply pipes.
3. The method for preventing cracking of radiant heating floor radiant heating based on crack prediction according to claim 1, characterized in that: In step S2, high-density polyethylene foam is pasted at the corners of the radiant heating floor to form a continuous isolation strip, which is combined with an expansion joint located in the middle of the floor to absorb the thermal expansion stress generated during the operation of radiant heating.
4. The method for preventing cracking of radiant heating floor radiant heating based on crack prediction according to claim 1, characterized in that, Step S3 includes the following steps: S301. Collect material performance parameters, environmental condition parameters, construction parameters, and heating operation parameters related to the formation of cracks in radiant heating floors; S302. Perform data preprocessing on the collected data, including missing value imputation, outlier removal, and unitization; S303. The data are feature-filtered by correlation analysis, variance screening and collinearity detection, and the parameter factors that are significantly related to crack formation are retained. S304. Establish a crack prediction model based on the screened parameters; S305. Train and validate the crack prediction model; S306. Output crack prediction results for radiant heating floors based on a validated crack prediction model.
5. A method for preventing cracking of radiant heating floor radiant heating based on crack prediction, as described in claim 4, is characterized in that: In step S304, the model parameters of the crack prediction model are constrained by introducing an L2 regularization term to reduce the risk of overfitting and improve the prediction stability.
6. A method for preventing cracking of radiant heating floor radiant heating based on crack prediction, as described in claim 4, is characterized in that: In step S305, the regularization parameter in the crack prediction model is optimized by cross-validation so that the crack prediction model has stable prediction performance under different data samples.
7. A method for preventing cracking of radiant heating floor radiant heating based on crack prediction, as described in claim 4, is characterized in that: In step S306, a crack risk heat map is generated based on the crack occurrence probability and crack width range to identify high-risk crack areas in radiant heating floors.
8. A method for preventing cracking of radiant heating floor radiant heating based on crack prediction as described in claim 1, characterized in that: In step S4, based on the crack risk heat map, expansion joints penetrating the ground structure layer are set in the high-risk crack area, and induction joints are formed on the surface of the concrete filling layer to guide the cracks.
9. A method for preventing cracking of radiant heating floor based on crack prediction as described in claim 8, characterized in that: The induced joint is a V-shaped induced joint, and a flexible sealing material is filled into the V-shaped induced joint after the concrete hardens.
10. A method for preventing cracking of radiant heating floor based on crack prediction according to claim 1, characterized in that: In step S5, after laying the insulation layer, the radiant heating pipe is fixed on the insulation layer. A flexible sleeve is installed at the location where the pipe passes through the expansion joint, and a steel mesh is laid on it before concrete pouring and curing.