A construction waste source component reverse tracing method, system, medium, and device

Abstract

The application provides a construction waste source component reverse tracing method, system, medium and equipment, and relates to the technical field of building industry interconnection. The method comprises the following steps: obtaining construction BIM component data and construction site data, taking a single category waste batch recorded as a reverse tracing starting point; performing integrity verification on the current batch of construction site data, and screening candidate source components from the BIM component data according to the construction site data; performing multi-dimensional source tracing matching calculation on the candidate source components to obtain a comprehensive matching degree; determining a one-to-one binding relationship, a one-to-many contribution proportion binding relationship or an abnormal state to be rechecked between the current batch and the BIM component data according to the comprehensive matching degree, a single component weight deviation rate and the number of candidate source components, and recording the binding result or the artificial rechecking result in the construction waste tracing object. The executability, accuracy and dynamic calibration capability of the construction waste source tracing are improved.

Description

Technical Field

[0001] This invention relates to the field of industrial internet technology in the construction industry, and in particular to a method, system, medium, and equipment for reverse tracing of construction waste source components. Background Technology

[0002] During the construction phase, various types of waste are generated, such as leftover concrete, steel scraps, and rework / demolition waste. Under the requirements of green construction, solid waste resource utilization, and full-process digital management, the type, weight, and destination of waste must be fully recorded on-site to accurately trace the construction procedures, areas, components, and responsible parties corresponding to the waste.

[0003] Currently, construction waste is mostly registered using paper ledgers, which can only record the time and area of ​​waste generation and cannot be linked to specific component instances within the BIM model. This makes it difficult to adapt to scenarios where multiple components generate a single batch of waste. Existing BIM and digital twin systems all use forward component management logic, which cannot trace components back from registered waste. Relying solely on manual matching based on waste type and region can easily lead to deviations such as redundant candidate components and mismatches in project quantity and weight. The lack of multi-source data fusion and intelligent reasoning capabilities makes it difficult to achieve integrated traceability and control of waste reverse candidate generation, quantitative matching, allocation ratio calculation, anomaly verification, and dynamic parameter calibration. Summary of the Invention

[0004] This invention proposes a method, system, medium, and equipment for reverse tracing of construction waste source components, in order to solve the problems in existing construction waste management that can only record waste batches, make it difficult to reverse determine their BIM source components, make it difficult to determine the contribution ratio of each source component when multiple components of the same waste category jointly generate the same waste batch, and lack on-site basis for parameter settings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for reverse tracing of construction waste source components, comprising: Acquire BIM component data of the preceding construction project and data of the completed construction site, and use the single category of waste batches that have been recorded as the starting point for reverse tracing. The integrity of the current batch of construction site data is verified. When the construction site data is complete or can be directly supplemented, candidate source components are selected from the BIM component data based on the construction site data to form a set of candidate source components. A multi-dimensional source matching calculation is performed on the candidate source components in the candidate source component set to obtain the comprehensive matching degree; Based on the overall matching degree, single component weight deviation rate, and number of candidate source components, determine the one-to-one binding relationship, one-to-many contribution ratio binding relationship, or abnormal pending review status between the current batch and BIM component data, and record the binding results or manual review results in the construction waste traceability object.

[0006] Secondly, the present invention provides a reverse tracing system for construction waste source components, comprising: The starting point determination module is configured to acquire BIM component data of the preceding construction project and data of the completed construction site, and use the single category of waste batches that have been recorded as the starting point for reverse tracing. The candidate component filtering module is configured to perform integrity verification on the construction site data of the current batch. When the construction site data is complete or can be directly supplemented, candidate source components are filtered from the BIM component data based on the construction site data to form a set of candidate source components. The matching degree calculation module is configured to perform multi-dimensional source matching calculation on the candidate source components in the candidate source component set to obtain the comprehensive matching degree. The object generation module is configured to determine the one-to-one binding relationship, one-to-many contribution ratio binding relationship, or abnormal pending review status between the current batch and BIM component data based on the comprehensive matching degree, single component weight deviation rate, and number of candidate source components, and record the binding result or manual review result in the construction waste traceability object.

[0007] Thirdly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the reverse tracing method for construction waste source components described in the first aspect.

[0008] Fourthly, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps in the reverse tracing method for construction waste source components described in the first aspect.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses batches of waste that have been generated and recorded on-site as the starting point for reverse tracing, linking BIM component data and on-site evidence into updatable construction waste traceability objects. Based on the type of on-site waste and the area of ​​generation, candidate source components are screened from BIM component instances, and the theoretically generated waste quantity and the deviation rate between theoretical and actual weight are calculated to obtain a comprehensive matching degree. Then, based on the above data, a one-to-one binding relationship, a one-to-many contribution ratio binding relationship, or an abnormal pending verification status is determined between the waste batch and the BIM source component. After manual verification, the final verification result is written back to the historical confirmed sample database to update the waste generation location, thereby improving the feasibility, accuracy, and dynamic calibration capability of reverse tracing the source of construction waste.

[0010] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute a limitation thereof.

[0011] Figure 1 The main flowchart of a method for reverse tracing of construction waste source components provided in an embodiment of the present invention is shown. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings. These embodiments are used to illustrate the implementation process of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent substitutions made based on the technical concept of the present invention regarding waste type, component type, construction procedures, data sources, or parameter values ​​should be included within the scope of protection of the present invention.

[0013] Example 1 like Figure 1 As shown in the figure, this embodiment discloses a method for reverse tracing of construction waste source components, including the following steps: S1: Obtain BIM component data of the preceding construction project and data of the completed construction site, using the single category of waste batches that have been recorded as the starting point for reverse tracing. S2: Perform a completeness check on the construction site data of the current batch. When the construction site data is complete or can be directly supplemented, select candidate source components from the BIM component data based on the construction site data to form a set of candidate source components. S3: Perform multi-dimensional source matching calculations on the candidate source components in the candidate source component set to obtain the comprehensive matching degree; S4: Based on the overall matching degree, single component weight deviation rate and the number of candidate source components, determine the one-to-one binding relationship, one-to-many contribution ratio binding relationship or abnormal pending review status between the current batch and BIM component data, and record the binding result or manual review result in the construction waste traceability object.

[0014] Next, combined Figure 1 This embodiment provides a detailed description of a method for reverse tracing of construction waste source components.

[0015] This embodiment addresses a single-category waste batch traceability scenario based on BIM components at a construction site. Specifically, this embodiment uses a batch of masonry block fragments generated after processing masonry wall components in Area A of the second floor of a building project as the traceability object. The batch number of this waste is W-2024-0201, the waste type is masonry block fragments, the actual measured weight on site is 120kg, the generation area is Area A of the second floor, and the generation time is t. w The date is 17:30 on February 1, 2024, and the corresponding construction procedure is masonry and cleaning. The on-site records include weighing records, mobile terminal data entry records, on-site photos, and barcode scanning records for waste removal, constituting a collection of waste materials of a single waste category.

[0016] S1, First, determine the starting point for tracing.

[0017] From the BIM building information model, which carries digital information throughout the building's entire lifecycle, and its corresponding exported data, we extract component identifiers, component types, material properties, quantities, spatial locations, floors, grid lines, construction areas, construction status, construction time, and construction sequence information. This type of data consists of standardized original parameters of components pre-entered during the early modeling stage of building construction, which can accurately correspond to each physical building component on the construction site. Simultaneously, we acquire construction site data, including waste batch numbers, waste types, actual measured weights, generation areas, generation times, and construction sequences. Using the waste batches that have been generated and recorded on-site as the starting point for reverse tracing, and linking subsequent steps with the pre-existing BIM component digital data, we establish a traceability system for construction waste.

[0018] The constructed construction waste traceability object is used to associate waste batches, on-site measured data, candidate source components, matching calculation results, binding status, abnormal causes, and manual review results.

[0019] This embodiment uses batches of construction waste that have been generated and recorded on-site as the starting point for reverse tracing. Instead of simply recording the construction status from the forward direction of BIM components, it associates on-site data such as waste type, measured weight, generation area, generation time, and construction sequence with BIM component instances, thus identifying the possible source components from the waste batches. This solves the problem that traditional waste ledgers can only record the quantity, type, and disposal destination of waste, making it difficult to further pinpoint specific BIM component instances. It elevates the traceability of construction waste sources from coarse-grained regional management to component-level traceability management, improving the feasibility of waste generation responsibility analysis, construction process review, and refined green construction management.

[0020] S2, In this embodiment, a waste batch refers to a collection of waste materials with a unique batch number and corresponding to a single waste category. Specifically, this applies to the scenario of tracing the source of construction waste from BIM components used in wall construction at a construction site. The on-site records must at least identify the waste type, measured weight, generation area, generation time, and construction procedure. A waste batch can be generated jointly by one or more BIM components whose material properties match or are compatible with that waste type. For multiple source components within the same waste batch, this embodiment uses a reverse tracing method based on comprehensive matching degree, overall weight deviation rate, and contribution ratio. The necessary on-site data for the current waste batch is verified for completeness, and a set of candidate source components is selected.

[0021] The necessary on-site data is the construction site data for the current batch, including the waste batch number, waste type, actual on-site measured weight, generation area, generation time, and construction procedure.

[0022] Among them, the waste batch number is used to distinguish different waste batches; the waste type is used to determine the material matching range; the on-site measured weight is used to calculate the weight deviation; the generation area is used to determine the spatial matching range; the generation time is used to determine the time matching range; and the construction procedure is used to determine the procedure matching range.

[0023] If the necessary on-site data is complete, continue to perform candidate source component screening and binding judgment; if the necessary on-site data is missing and cannot be directly supplemented by the weighing record, barcode record, transport manifest, construction log or manual review record corresponding to the waste batch, do not automatically bind, but set the waste batch to an abnormal pending review status. In this embodiment, the waste batch number, waste type, on-site measured weight, generation area, generation time and construction procedure of the waste batch have been completely recorded, so the candidate source component screening continues.

[0024] Based on the waste type, generation area, generation time and construction procedure in the construction site data, candidate source components are selected from BIM component instances to form a set of candidate source components.

[0025] Specifically, based on the material mapping relationship between waste type and material properties, components whose material properties match the waste type are retained, while components whose material properties are incompatible with the waste type are removed, and material-compatible components are selected from the BIM component data.

[0026] Based on the regional mapping relationship between the waste generation area and spatial location, floor, grid and construction area, retain the components located in Zone A of the second floor or spatially related to Zone A of the second floor, and filter out the spatially related components from the BIM component data; Based on the waste generation time and the corresponding construction time information of BIM components, the time matching relationship of candidate components is determined, and time-related components are selected from the BIM component data.

[0027] Based on the process association between the construction process corresponding to the waste batch and the construction process information corresponding to the BIM component, process-related components are selected from the BIM component data.

[0028] After the above screening, a set of candidate source components is formed.

[0029] It should be understood that the material mapping relationship, area mapping relationship, time matching relationship, and process association relationship are all preset configuration rules. The parameters and matching logic can be set flexibly and independently by those skilled in the art based on the project construction standards and BIM component attributes. This embodiment does not limit these settings.

[0030] This embodiment filters the candidate component set layer by layer based on the multi-dimensional on-site data of waste and the multi-level mapping relationship between BIM components. This can significantly reduce the range of redundant candidate components caused by manual matching, efficiently filter irrelevant components, and provide an accurate and reliable traceability object basis for subsequent calculations.

[0031] S3 calculates the theoretically possible amount of waste, the weight deviation rate of a single component, the material consistency, the spatial matching, the time matching, the process matching, and the reasonableness of the amount of waste for the candidate source components in the candidate source component set, and obtains the comprehensive matching degree.

[0032] After the above screening, the candidate source component set includes wall component C1 of the second floor A area, wall component C2 of the second floor A area, and wall component C3 of the adjacent area. First, for the i-th candidate source component in the candidate source component set, the system calculates its theoretically generated waste amount according to the following formula: W i th = V i × ρ i × η i ; Where i represents the i-th candidate source component in the candidate source component set; W i th V represents the theoretical amount of waste that the i-th candidate source component can generate; i ρ represents the volume of the i-th candidate source component; i η is the material density; i The waste generation coefficient is initially derived from the construction quota loss rate, the company's historical waste ledger, or the statistical value of similar projects, and is updated as samples are manually confirmed. In this embodiment, the masonry volume V1 of C1 is 10.0 m³, the masonry volume V2 of C2 is 7.5 m³, and the masonry volume V3 of C3 is 4.17 m³; the densities ρ1, ρ2, and ρ3 of the masonry materials are all taken as 600 kg / m³; and the initial waste generation coefficients η1, η2, and η3 of the masonry debris are all taken as 0.010. Therefore, the theoretical waste amount W1 that can be generated by C1 is calculated. th For a weight of 60 kg, the theoretical waste amount W2 that can be generated by C2 is... th The theoretical waste amount W3 is 45kg. th It weighs approximately 25 kg. Secondly, based on the actual weight measured on-site (Wactual) and the theoretical waste amount (W) of each candidate source component, i th The weight deviation rate of a single component is calculated according to the following formula: E i = |Wactual W i th | / max(W i th , ε); Among them, E i Wi represents the single-component weight deviation rate of the i-th candidate source component; Wactual represents the actual measured weight of the waste batch on-site; ε is used to avoid denominator distortion caused by the theoretical waste amount being zero or extremely small, and ε is calculated based on the minimum resolution of the weighing equipment and the minimum positive theoretical waste amount Wi. i th The value is determined by the larger of one-thousandth and 0.1 kg. In this embodiment, the minimum resolution of the weighing device is 0.1 kg, and the minimum positive theoretical waste amount in the candidate source component set is 25 kg, therefore ε is taken as 0.1 kg. Next, according to E i Determine the rationality index Q for waste quantity i Specifically: Q i = 1, E i ≤ E1; Q i = (E2 E i ) / (E2 E1), E1 <E i ≤ E2; Q i = 0, E i >E2; Where E1 represents the normal fluctuation threshold and E2 represents the unacceptable deviation threshold.

[0033] E1 and E2 are jointly determined by the weight deviation distribution of historically confirmed samples, weighing equipment errors, material loss fluctuations, and construction process characteristics. For example, the larger of the 50th percentile of the weight deviation rate of the verified samples under the same waste type and process, or the larger of the weighing allowable error, can be used as E1, and the larger of the 90th percentile or 2E1 can be used as E2. When there are no historical samples, the enterprise quota loss allowable deviation and trial operation samples are used as initial values.

[0034] This embodiment calculates the theoretical waste amount of components and the weight deviation rate of single components, and obtains the waste amount rationality index by segmenting and mapping. It can quantitatively evaluate the matching degree between each candidate component and the waste on site, intuitively distinguish between normal, critical and abnormal components, and provide standardized numerical basis for subsequent multi-dimensional traceability matching calculation.

[0035] Calculate the material consistency index M respectively i Spatial matching index S i Time matching index T i Process matching index P i .

[0036] Material consistency index M i Determined by the mapping table between waste type and component material. If the waste type and component material are completely identical, M... i Take 1; if it belongs to the preset compatible materials, such as masonry fragments being compatible with masonry walls, M i Take a value of 0.7 to 0.9; if the materials are incompatible, M i If the value is 0, it can be removed from the candidate set.

[0037] Spatial matching index S i Determined by the on-site generated area and the spatial location of BIM components. If candidate components are located in the same work area, S i Take 1; if located on an adjacent work surface or in an adjacent area on the same floor, S i Take a value of 0.6 to 0.8; if located on the same floor but not in adjacent areas, S i Take a value between 0.3 and 0.5; if the space is unrelated, S i Take 0. Time matching index T iThis is used to represent the degree of matching between the generation time of the waste batch and the construction time of the i-th candidate source component. Let the generation time of the waste batch be t. w The construction start time of the i-th candidate source component is a. i Construction completion time is b i The construction operation records include construction logs, progress confirmation records, cleaning records, removal records, or manual verification records; when a batch of waste corresponds to a main construction procedure, a i and b i Take the start and end times of the main construction records of the candidate source component; when the waste batch corresponds to the cleaning or removal process, a i and b i Retrieve the start and end times of the associated cleanup or transport records for the candidate source component.

[0038] Time matching index T i Determine by the following formula: T i = 1, a i ≤ t w ≤ b i ; T i = 0, t w i or t w >b i ; Process matching index P i P is determined according to the following rule: when the construction process corresponding to the waste batch is completely consistent with the construction process of the candidate source component, i Take 1; when the construction process corresponding to the waste batch is the direct subsequent cleaning, repair, or removal process of the candidate source component construction process, P i Take a value of 0.6 to 0.8; when the two belong to the same profession but are not directly continuous processes, P i Take a value of 0.3 to 0.5; when there is no process relationship between the two, P i Take 0.

[0039] Finally, a multi-dimensional source tracing and matching calculation is performed, and the comprehensive matching degree is calculated according to the following formula: R i = αM i + βS i + γT i + δP i + μQ i ; Among them, R i ​The overall matching degree of the i-th candidate source component is represented by α, β, γ, δ, and μ, which represent the weight coefficients of five categories of indicators: material consistency, spatial matching, temporal matching, process matching, and reasonableness of waste quantity, respectively. Each weight coefficient is not less than 0, and α+β+γ+δ+μ=1. Each weight can be set with an initial value according to the waste type and updated based on the indicator differences between correctly bound samples and incorrect candidate samples in the historical confirmed sample library. In this embodiment, E1 is set to 0.30, E2 to 6.00, and the weighting coefficients are α=0.20, β=0.20, γ=0.10, δ=0.10, and μ=0.40. Based on material consistency, spatial matching, time matching, process matching, and waste quantity rationality indicators, the system generates the following calculation results: Theoretically, C1 can generate a waste amount of W1. th The weight is 60kg, the single component weight deviation rate E1 is 1.000, the material consistency index M1 is 1, the spatial matching index S1 is 0.80, the time matching index T1 is 1, the process matching index P1 is 0.50, the waste amount rationality index Q1 is 0.877, and the overall matching degree R1 is approximately 0.86.

[0040] Theoretically, C2 can generate a waste amount of W2. th The weight is 45kg, the single component weight deviation rate E2 is 1.667, the material consistency index M2 is 1, the spatial matching index S2 is 0.83, the time matching index T2 is 1, the process matching index P2 is 0.50, the waste amount rationality index Q2 is 0.760, and the overall matching degree R2 is approximately 0.82.

[0041] Theoretically, C3 can generate W3 units of waste. th The weight is 25kg, the single component weight deviation rate E3 is 3.800, the material consistency index M3 is 0.80, the spatial matching index S3 is 0.60, the time matching index T3 is 1, the process matching index P3 is 0.65, the waste amount rationality index Q3 is 0.386, and the overall matching degree R3 is approximately 0.60.

[0042] The overall matching degree R of all candidate source components i Sort by size from largest to smallest, and denote the largest value as the first largest comprehensive matching degree R(1), and denote its corresponding candidate source component as C(1); when the number of candidate source components is not less than two, denote the second largest comprehensive matching degree as R(2), and denote its corresponding candidate source component as C(2); when the number of candidate source components is one, R(2) is 0.

[0043] Therefore, the overall matching degree of all candidate source components is sorted from largest to smallest, resulting in R(1) = 0.86, corresponding to candidate source component C1; R(2) = 0.82, corresponding to candidate source component C2; and R(3) = 0.60, corresponding to candidate source component C3. The overall matching degree of all candidate source components is sorted from largest to smallest, and the maximum value is recorded as the first largest overall matching degree R(1), and its corresponding candidate source component is recorded as C(1); when the number of candidate source components is not less than two, the second largest overall matching degree is recorded as R(2), and its corresponding candidate source component is recorded as C(2). In this embodiment, the comprehensive matching degree of candidate source components is calculated by indicators such as material consistency, spatial matching, time matching, process matching and reasonableness of waste amount. The binding judgment is also combined with the deviation between the theoretically generated waste amount and the actual measured weight on site, so as to avoid misjudgment caused by directly determining the source component based solely on waste type, generation area or human experience.

[0044] S4, determine the reverse traceability binding relationship.

[0045] Based on the overall matching degree, single component weight deviation rate, and number of candidate source components, determine the one-to-one binding relationship, one-to-many contribution ratio binding relationship, or abnormal pending review status between the current batch and BIM component data.

[0046] For cases where a single candidate component can reasonably explain a waste batch, the system establishes a one-to-one binding relationship; for cases where multiple components jointly generate the same waste batch, the system judges the rationality of the one-to-many binding by the overall weight deviation rate and calculates the contribution ratio of each source component, thereby improving the accuracy and quantifiability of waste source identification in scenarios where the same waste category is jointly generated by multiple source components.

[0047] Specifically, when the first comprehensive matching degree is not lower than the preset binding threshold, the difference between the first comprehensive matching degree and the second comprehensive matching degree is not lower than the preset differentiation threshold, and the single component weight deviation rate of the first candidate source component corresponding to the first comprehensive matching degree does not exceed the preset abnormal threshold, the first candidate source component is determined as the only BIM source component of the current waste batch, and a one-to-one binding relationship is established. If the first candidate source component cannot reasonably explain the on-site measured weight of the waste batch, or if the difference between the first comprehensive matching degree and the second comprehensive matching degree does not reach the preset distinction threshold, then it is determined whether to establish a one-to-many contribution ratio binding relationship. If all candidate source components simultaneously meet the material consistency index, spatial matching index, time matching index, and process matching index, and the theoretical waste amount is greater than zero, and the number of candidate source components is greater than or equal to two, then a one-to-many contribution ratio binding relationship is established; otherwise, the current waste batch is set to an abnormal pending review status.

[0048] First, preset the binding threshold τ b Preset discrimination threshold τ d and preset abnormal threshold τ e Determined by a historically confirmed sample database or trial operation samples. As one implementation method, when no historically confirmed samples are available, τ b Take 0.80, τ d Take 0.15, τ e Set to 0.30; when the number of historically confirmed samples reaches the preset number, τ b The 25th percentile of the overall matching degree of the correctly bound samples can be taken, τ d The 25th percentile of the difference in the overall matching degree between the first and second candidate source components in the correctly bound samples can be taken as τ. e The 90th percentile of the correct binding sample weight deviation rate can be taken.

[0049] For determining a one-to-one binding relationship: the binding status is determined based on the single component weight deviation rate E(1) of R(1), R(2), and C(1) and the number of candidate components. When R(1) is not lower than the preset binding threshold τ... b , R(1) R(2) is not lower than the preset discrimination threshold τ d And E(1) corresponding to C(1) does not exceed the preset abnormal threshold τ. e At that time, the system will identify C(1) as the unique BIM source component of the waste batch and establish a one-to-one binding relationship.

[0050] Where, τ b τ represents the minimum overall matching degree required for one-to-one automatic binding. d τ represents the minimum discriminative power required between the first candidate source component and the second candidate source component. e τ is the upper limit of the allowable weight deviation rate. b τ d and τ e Determined from historically confirmed sample databases or trial operation samples.

[0051] According to the settings in this embodiment, a preset binding threshold τ is used. b The preset discrimination threshold τ is 0.80. d The preset abnormal threshold τ is 0.15. e It is 0.30. Although R(1) reaches τ b , but R(1) R(2) = 0.04, which is less than τ. dThis indicates that C1 does not provide sufficient differentiation from C2; furthermore, the theoretical waste output of C1 is 60 kg, which cannot reasonably explain the actual measured weight of 120 kg on-site. Therefore, the system does not directly establish a one-to-one binding relationship, but instead continues to determine whether to establish a one-to-many contribution ratio binding relationship. For determining the one-to-many contribution ratio binding relationship: First, determine the set G of candidate source components that can participate in the one-to-many determination from the candidate source component set. The candidate source components in set G should simultaneously meet the following condition: material consistency index M. i A value greater than 0 indicates that the spatial matching index S is greater than or equal to 0. i Greater than 0, time matching index T i A value greater than 0 indicates that the process matching index P is positive. i Greater than 0, and theoretically capable of generating waste amount W i th Greater than 0. If the number of candidate source components in set G is less than two, the system does not establish a one-to-many binding relationship, but instead sets the waste batch to an abnormal pending review state. In this embodiment, C1, C2, and C3 all satisfy the above conditions, therefore G={C1, C2, C3}. According to the overall matching degree R i Sort the candidate source components in set G from largest to smallest. Let the sorted candidate source components be C1, C2, ..., C60. N , where N is the number of candidate source components in set G. The system forms a one-to-many candidate set H2={C1, C2} starting from the first two sorted candidate source components, and calculates the overall weight deviation rate of this set; if the overall weight deviation rate of H2 does not exceed the preset anomaly threshold τ e If H2 is identified as a one-to-many source component set, then H2 is determined as such. If the overall weight deviation rate of H2 exceeds the preset anomaly threshold τ... e Then, based on the overall matching degree, the next candidate source component is added, forming H3={C1, C2, C3}, H4={C1, C2, C3, C4}, and so on, until H... N ={C1, C2, ..., C N If the overall weight deviation rate of all sets exceeds the preset anomaly threshold τ, then... e If the system does not force the establishment of a one-to-many binding relationship, it will instead set the waste batch to an abnormal pending review status.

[0052] For a one-to-many candidate set H, the system calculates the overall weight deviation rate: E H = |Wactual Σ j ∈HW j th | / max(Σ j∈HW j th , ε); Among them, E H E is used to determine the overall deviation when combining multiple candidate components to explain the weight of a waste batch. i Used to determine the deviation when a single candidate component independently explains the weight of a waste batch. The two formulas are similar in form but apply to different objects. If E H ≤τ e Then the system establishes a one-to-many contribution ratio binding relationship. According to the settings in this embodiment, for H={C1, C2}, the theoretical waste amount generated by C1 is 60kg, the theoretical waste amount generated by C2 is 45kg, and the sum of the theoretical waste amounts generated by the candidate source components in set H is 105kg. The actual weight measured on site is 120kg, therefore the overall weight deviation rate E H It is approximately 0.143. Since 0.143 does not exceed the preset anomaly threshold τ... e =0.30, the system determines H={C1, C2} as a one-to-many source component set and establishes a one-to-many contribution ratio binding relationship. The contribution ratio is determined by the following formula: λ i = (R i × W i th ) / Σ(R j × W j th ), i∈H, j∈H; Where, λ i R represents the contribution ratio of the i-th source component in set H to this batch of waste; i W represents the overall matching degree of the i-th source component in set H; i th R represents the theoretical amount of waste that the i-th source component in set H can generate; j W represents the overall matching degree of the j-th source component in set H; j th This represents the theoretical amount of waste that the j-th source component in set H can generate; Σ(R j × W j th ) represents the weighted theoretical waste amount of all candidate source components in set H. When Σ(R j ×W j th When the value is 0, the system does not calculate the contribution ratio and sets the waste batch to an abnormal pending review status. In this embodiment, the overall matching degree R1 of C1 is 0.86, and the theoretical waste amount W1 can be generated.th The weight is 60 kg; the overall matching degree R2 of C2 is 0.82, and the theoretical waste amount W2 can be generated. th The weight is 45 kg. According to the contribution ratio formula, the contribution ratio λ1 of C1 is approximately 0.583, and the contribution ratio λ2 of C2 is approximately 0.417. Therefore, the system establishes a one-to-many binding relationship between waste batch W-2024-0201 and BIM source components C1 and C2 respectively, and records that the contribution ratio of C1 is approximately 58.3% and the contribution ratio of C2 is approximately 41.7%. For waste batches with established one-to-many binding relationships, the sum of the contribution ratios of all source components in set H is 1.

[0053] As one implementation method, after binding is completed, the system writes the waste batch number, on-site measured weight, generation area, generation time, construction procedure, candidate source components, calculated values ​​of various indicators, comprehensive matching degree, one-to-many source component set, contribution ratio, and binding time into the construction waste traceability object. If the manual reviewer confirms that the one-to-many binding result is correct, the system writes the confirmed source components, confirmed contribution ratio, reviewer, review time, and review conclusion into the historical confirmation sample database; if the manual reviewer believes that other candidate components also participated in the generation of this batch of waste, or believes that the contribution ratio needs to be adjusted, the system uses the manual review result as the final confirmation result and saves the binding results before and after the review as different versions.

[0054] This embodiment writes the binding results, on-site measured data, causes of anomalies, manual verification results, and subsequent disposal records into the construction waste traceability object and historical confirmation sample database, enabling the source judgment process, calculation basis, and verification conclusions of each batch of waste to be saved and traced. When a candidate component cannot reasonably explain the waste weight, necessary on-site data is missing, or on-site evidence is conflicting, the system does not force automatic binding but instead enters an abnormal pending verification state, reducing the risk of incorrect binding. After manual verification is completed, the system can use the confirmed samples to update the waste generation coefficient and matching parameters, so that the source tracing of subsequent batches of similar waste gradually conforms to the actual situation of the construction site, improving the system's dynamic calibration capability and long-term applicability.

[0055] Establishing a reverse traceability link from construction waste to BIM components can break down the data barriers between on-site waste records and 3D model data, enabling precise location of waste sources, addressing the shortcomings of traditional forward BIM systems' one-way management, and constructing an integrated intelligent management and control closed loop for the entire lifecycle of construction waste. Through the above implementation method, the system can reverse-bind waste batches with BIM component instances after they have been generated and recorded on-site. When a single component can reasonably explain the weight of the waste batch and its overall matching degree is significantly higher than other candidate components, the system establishes a one-to-one binding relationship; when multiple candidate components collectively explain the weight of the waste batch more reasonably, the system establishes a one-to-many binding relationship and calculates the contribution ratio; when necessary on-site data is missing, candidate components are empty, weight deviation exceeds the allowable range, or there are conflicting on-site evidence, the system enters an abnormal pending review state. Therefore, this invention enables reverse traceability of construction waste from batch ledgers to BIM source components, and continuously calibrates relevant parameters through manual review and historical confirmation sample databases.

[0056] Example 2 This embodiment provides a reverse tracing system for construction waste source components, including: The starting point determination module is configured to acquire BIM component data of the preceding construction project and data of the completed construction site, and use the single category of waste batches that have been recorded as the starting point for reverse tracing. The candidate component filtering module is configured to perform integrity verification on the construction site data of the current batch. When the construction site data is complete or can be directly supplemented, candidate source components are filtered from the BIM component data based on the construction site data to form a set of candidate source components. The matching degree calculation module is configured to perform multi-dimensional source matching calculation on the candidate source components in the candidate source component set to obtain the comprehensive matching degree. The object generation module is configured to determine the one-to-one binding relationship, one-to-many contribution ratio binding relationship, or abnormal pending review status between the current batch and BIM component data based on the comprehensive matching degree, single component weight deviation rate, and number of candidate source components, and record the binding result or manual review result in the construction waste traceability object.

[0057] Example 3 This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps in the reverse tracing method for construction waste source components as described in Embodiment 1 above.

[0058] Example 4 This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps in the reverse tracing method for construction waste source components as described in Embodiment 1 above.

[0059] The steps or modules involved in Embodiments 2 to 4 above correspond to those in Embodiment 1. For specific implementation details, please refer to the relevant description section of Embodiment 1. The term "computer-readable storage medium" should be understood as a single medium or multiple media including one or more instruction sets; it should also be understood as including any medium capable of storing, encoding, or carrying an instruction set for execution by a processor and enabling the processor to perform any of the methods in this invention.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for reverse tracing of construction waste source components, characterized in that, include: Acquire BIM component data of the preceding construction project and data of the completed construction site, and use the single category of waste batches that have been recorded as the starting point for reverse tracing. The construction site data includes waste batch number, waste type, actual on-site measured weight, generation area, generation time, and construction procedure. The integrity of the current batch of construction site data is verified. When the construction site data is complete or can be directly supplemented, candidate source components are selected from the BIM component data based on the construction site data to form a set of candidate source components. A multi-dimensional source matching calculation is performed on the candidate source components in the candidate source component set to obtain the comprehensive matching degree; The multi-dimensional traceability matching calculation includes material consistency calculation, spatial matching calculation, time matching calculation, process matching calculation, and waste quantity rationality calculation. The waste quantity rationality calculation is obtained by sequentially calculating the waste quantity and single component weight deviation rate, and then comparing them with a preset threshold. The overall matching degree is calculated according to the following formula: R i = αM i + βS i + γT i + δP i + μQ i ; Among them, R i The overall matching degree of the i-th candidate source component is represented by α, β, γ, δ, and μ, respectively, which represent the material consistency index M. i Spatial matching index S i Time matching index T i Process matching index P i and the reasonableness index of waste amount Q i The weighting coefficients of the five categories of indicators are all not less than 0, and α+β+γ+δ+μ=1; Based on the overall matching degree, single component weight deviation rate, and the number of candidate source components, determine the one-to-one binding relationship, one-to-many contribution ratio binding relationship, or abnormal pending review status between the current batch and BIM component data, and record the binding result or manual review result in the construction waste traceability object; when the first overall matching degree is not lower than the preset binding threshold, the difference between the first overall matching degree and the second overall matching degree is not lower than the preset differentiation threshold, and the single component weight deviation rate of the first candidate source component corresponding to the first overall matching degree does not exceed the preset abnormal threshold, the first candidate source component is determined as the unique BIM source component of the current waste batch, and a one-to-one binding relationship is established; when the first candidate If the source component cannot reasonably explain the on-site measured weight of the waste batch, or if the difference between the first comprehensive matching degree and the second comprehensive matching degree does not reach the preset distinction threshold, then it is determined whether to establish a one-to-many contribution ratio binding relationship. If all candidate source components simultaneously meet the material consistency index, spatial matching index, time matching index, and process matching index, and the theoretical waste amount is all greater than zero, and the number of candidate source components is greater than or equal to two, then a one-to-many contribution ratio binding relationship is established; otherwise, the current waste batch is set to an abnormal pending review status. Among them, the first comprehensive matching degree is the comprehensive matching degree of the first candidate source component, and the second comprehensive matching degree is the comprehensive matching degree of the second candidate source component.

2. The method for reverse tracing of construction waste source components as described in claim 1, characterized in that, The BIM component data includes component identification, component type, material properties, quantity, spatial location, floor, grid, construction area, construction status, construction time information, and construction procedure information.

3. The method for reverse tracing of construction waste source components as described in claim 2, characterized in that, The step of filtering candidate source components from the BIM component data based on construction site data to form a candidate source component set specifically includes: Based on the material mapping relationship between waste type and material properties in the BIM component data, material-compatible components are screened; Based on the regional mapping relationship between the current waste batch generation area and the spatial location, floor, grid, and construction area in the BIM component data, spatially related components are selected; Based on the generation time of the current waste batch and the construction time information in the BIM component data, time-related components are filtered; Based on the process association relationship between the construction process corresponding to the current waste batch and the construction process information in the BIM component data, process-related components are screened.

4. The method for reverse tracing of construction waste source components as described in claim 1, characterized in that, This also includes setting the waste batch to an abnormal pending review status when construction site data is missing and cannot be directly supplemented by the record data corresponding to the current batch; The recorded data corresponding to the current batch includes weighing records, barcode scanning records, transport manifests, construction logs, or manual verification records.

5. The method for reverse tracing of construction waste source components as described in claim 1, characterized in that, The process of recording the binding results or manual verification results into the construction waste traceability object specifically involves recording the waste batch number, on-site measured weight, generation area, generation time, construction procedure, candidate source components, calculated values ​​of various indicators, comprehensive matching degree, binding relationship, and binding time into the construction waste traceability object.

6. A reverse traceability system for construction waste source components, characterized in that, The reverse tracing method for construction waste source components as described in claim 1 includes: The starting point determination module is configured to acquire BIM component data of the preceding construction project and data of the completed construction site, and use the single category of waste batches that have been recorded as the starting point for reverse tracing. The candidate component filtering module is configured to perform integrity verification on the construction site data of the current batch. When the construction site data is complete or can be directly supplemented, candidate source components are filtered from the BIM component data based on the construction site data to form a set of candidate source components. The matching degree calculation module is configured to perform multi-dimensional source matching calculation on the candidate source components in the candidate source component set to obtain the comprehensive matching degree. The object generation module is configured to determine the one-to-one binding relationship, one-to-many contribution ratio binding relationship, or abnormal pending review status between the current batch and BIM component data based on the comprehensive matching degree, single component weight deviation rate, and number of candidate source components, and record the binding result or manual review result in the construction waste traceability object.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps in the reverse tracing method for construction waste source components as described in any one of claims 1-5.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the reverse tracing method for construction waste source components as described in any one of claims 1-5.

Images