Railway 4D inspection and pricing method based on BIM model

Abstract

This invention discloses a railway 4D inspection and pricing method based on a BIM model, comprising the following steps: 1. Formulating WBS codes for railway 4D inspection based on the BIM model for each specialty; 2. Importing the WBS and bill of quantities mapping table; 3. The inspection batch process enters the pending confirmation state upon completion; 4. Final verification and confirmation before quarterly pricing; 5. Exporting the inspection pricing table and quantity table from the system; 6. Creating a new online inspection and pricing process; 7. Creating a new payment application form. The steps are interconnected, achieving a fully digital closed loop of "model-quantity-progress-quality-pricing-payment". This application reduces data errors and deviations and improves pricing accuracy through automated data calculation; based on accurate model and inspection batch progress status information, it reduces errors caused by human operation and data entry, and can be widely applied to construction project inspection and pricing systems.

Description

Technical Field

[0001] This invention relates to the field of engineering information technology in the construction industry, and in particular to a 4D railway construction verification and pricing method based on BIM models. Background Technology

[0002] Currently, with the rapid development of the construction industry, enterprises need to compare, analyze, provide early warnings, and summarize massive amounts of project information (such as bill of quantities data) to achieve full-process management of construction projects. However, the bill of quantities pricing standards adopted by different provinces vary significantly, or different versions of the standards are used with inconsistent coding. This makes it difficult to uniformly identify and retrieve project data in computer systems, often requiring manual judgment based on experience, which is inefficient, costly, and inaccurate. Meanwhile, existing methods of work verification and pricing have several problems: ① High difficulty in manual review, prone to over-reporting: In traditional work verification and pricing, the amount of measurement and payment review data is large, and the transparency of process management data is low. Contractors may inflate the amount of work to alleviate financial difficulties. Reviewers must be familiar with measurement and payment management methods and relevant regulations of the business department, and keep abreast of on-site construction dynamics. The work is complex, manual review is difficult, and over-reporting is likely; ② Large workload of data calculation, requiring high professional skills: The bill of quantities pricing content is detailed, and the cost control workload for all participating parties is significant. During the measurement process, different professional measurements are often required for different construction sections. Due to the influence of subjective factors, the measurement error may be large. To avoid this, business personnel must have a high level of professional expertise; ③ Difficulty in ensuring data quality, prone to errors: In traditional work verification and pricing, because... The traditional methods of work verification and pricing suffer from several drawbacks. Firstly, the data sources are numerous and the data transmission chain is long, making it difficult to guarantee data quality and prone to errors. This is especially true when there are discrepancies between the bill of quantities and the actual construction work, leading to inaccuracies in the verification and pricing results. Secondly, the data quality is difficult to guarantee, and errors are easily transmitted: In traditional work verification and pricing, the data flow is often disjointed, with severe information silos between different stages. Data cannot be transmitted and shared in a timely manner, making it difficult for different departments to collaborate and communicate, thus affecting the efficiency and accuracy of work verification and pricing. Thirdly, the review process is lengthy, affecting payment progress: In traditional work verification and pricing, the review process is lengthy, and the review results require confirmation from multiple parties, seriously affecting the payment progress and potentially causing problems with the construction unit's cash flow. If objections or disputes arise, the review time will be even longer, affecting the overall project progress. Fourthly, it cannot reflect the construction site situation in a timely manner: In traditional work verification and pricing, the data sources are mainly paper materials and manual input, which cannot reflect the construction site situation in a timely manner.

[0003] Therefore, this application proposes a railway 4D inspection and pricing method based on BIM model. Summary of the Invention

[0004] The purpose of this invention is to develop a railway 4D inspection and pricing method based on a BIM model on a BIM platform. By using the association technology between the WBS coding system and the bill of quantities coding, the system can establish the relationship between the component attributes of the BIM model and the bill of quantities, ensuring accurate matching between the bill of quantities and the actual parts. Through the association between the bill of quantities and the WBS, as well as the transmitted progress procedures and rectification status of safety and quality issues, the system can quickly screen out the period that meets the current measurement requirements. Based on the model quantity, the system automatically calculates the inspection quantity for the current period, realizing the function of intelligent 4D inspection.

[0005] To achieve the above objectives, this invention provides a railway 4D inspection and valuation method based on a BIM model, comprising the following steps:

[0006] S1: Establish a standard for the relationship between BIM model WBS coding and list item coding to form a unique language for subsequent operations;

[0007] S2: Import Bill of Quantities and Corresponding Inspection Batches: Perform one-click import to automatically link the quantity of each bill of quantities to the corresponding inspection batch, providing a data foundation for subsequent automatic quantity calculation, progress tracking, and payment settlement;

[0008] S3: All procedures for the inspection batch are completed, and the inspection batch enters the pending confirmation state: proceed with mobile phone data entry, online approval, and status locking in sequence;

[0009] S4: Final verification and confirmation before quarterly pricing; centralized review of all "pending confirmation" inspection batches, one-click confirmation or manual removal / correction, generating the official pricing list for the quarter;

[0010] S5: Select the year and quarter in the confirmed inspection batch, export the unit project price list for each sub-section, export the joint inspection work pricing list, export the quantity list for each sub-section, and export the price list for each sub-section within the system.

[0011] S6: Create a new online process for work verification and pricing: import the quantity table, automatically calculate the data including cumulative start-up and annual cumulative data, and push the documents to be signed to the corresponding responsible person's to-do list according to the approval process for signature and stamping.

[0012] S7: After the work verification and pricing process is completed, a new consortium split table and payment application form are created: the "quarterly work verification and pricing amount" is automatically split to each member unit of the consortium, and the online payment application is triggered simultaneously, so that the three steps of "pricing-split-payment" can be completed in one go.

[0013] According to embodiments of this application, the relationship standard between BIM model WBS coding and list item coding has an independent mapping method, which is mapped according to the characteristics and structural properties of the project.

[0014] According to the embodiments of this application, in step S3, the next process cannot proceed until the previous process is completed during the batch inspection process management. After passing the inspection, the platform automatically marks the batch inspection with a "pending confirmation" label, ensuring the timeliness of batch inspection management without any delays.

[0015] According to the embodiments of this application, in step S5, the standard report includes a detailed list of sub-items, a summary table, a quantity table, and a pricing table containing unit prices and total prices, which can be directly used for quantity reporting, verification, and payment without secondary processing.

[0016] According to the embodiments of this application, in step S6, during the online review of the pricing process for documents to be signed, the document can be rejected at any time, and if rejected at any node, it can be modified and then transferred again, with the entire process leaving a trace.

[0017] According to an embodiment of this application, in step S6, the signature supports a CA certificate and is signed and cannot be tampered with.

[0018] According to the embodiments of this application, step 7 specifically includes the following steps: One-click splitting: The system reads the finalized quarterly work completion and pricing total amount, and automatically generates a "Quarterly Splitting Table" according to the consortium agreement (proportion or list ownership), and each member unit confirms and stamps it online; Synchronous payment request: Once the splitting table is locked, the corresponding share immediately generates a "Payment Application Form" for each member unit, without the need for secondary entry; Electronic signature closed loop: The platform automatically summarizes and forms a "Payment Ledger", which is directly connected to the financial shared system for payment.

[0019] According to an embodiment of this application, in step 7, the consortium is split up before the payment is made.

[0020] The advantages of the present invention over the prior art are:

[0021] 1. This application presents a railway 4D inspection and pricing system based on a BIM model. Through the association technology between the WBS coding system and the bill of quantities coding, it can establish the relationship between the component attributes of the BIM model and the bill of quantities, ensuring accurate matching between the bill of quantities and the actual parts. By using the association relationship between the bill of quantities and the WBS, as well as the transmitted progress procedures and rectification status of safety and quality issues, the system can quickly filter out the period that meets the current measurement requirements. Based on the model quantity, the system automatically calculates the inspection quantity for the current period, realizing the function of intelligent 4D inspection.

[0022] 2. The railway 4D inspection and valuation method based on BIM model proposed in this application has the following advantages:

[0023] 1) Automatic Calculation and Export of Work Quantities: The 4D Work Inspection and Pricing System can automatically determine the completion status of inspection batches and export the corresponding work quantities in the bill of quantities format. This reduces tedious manual operations and improves work efficiency. The system can automatically calculate the current period's inspection quantity based on the relationship between the bill of quantities and the Work Breakdown Structure (WBS) and the completion status of inspection batches, avoiding potential errors caused by manual calculation.

[0024] 2) Reduced Data Errors and Biases: Through automated data calculation, the 4D inspection and pricing system can reduce data errors and biases, improving pricing accuracy. The system is based on accurate models and inspection batch progress status information, reducing errors caused by human operation and data entry.

[0025] 3) Information Sharing and Collaboration: Standardized collaborative management actions facilitate the expansion of BIM technology applications and enhance project collaborative management capabilities. The 4D work completion and cost assessment system enables information sharing and collaboration. Through the correlation between WBS and model data, the system can integrate relevant data from modules such as processes, schedules, and quality, achieving information sharing and collaboration between various stages, improving project management efficiency, and reducing information silos.

[0026] 4) Cost Transparency: The 4D work measurement and pricing system enables cost transparency, facilitating effective control and management of various expenses. The system clearly records and tracks the quantity and corresponding cost of each component, making the cost situation clear at a glance and easy to monitor and manage. Attached Figure Description

[0027] Figure 1 This is a flowchart of the railway 4D inspection and valuation method based on BIM model in the example of this invention;

[0028] Figure 2 This is a schematic diagram of the newly created online process for work verification and pricing in an example of the present invention;

[0029] Figure 3 This is a schematic diagram of the work verification and pricing process approval in an example of the present invention;

[0030] Figure 4 This is a schematic diagram of the newly created consortium split table and the fund disbursement application form in an example of the present invention;

[0031] Figure 5 This is a schematic diagram of the splitting table and the fund disbursement application approval form;

[0032] Figure 6 This is a diagram showing the batch entering a pending confirmation phase after the inspection process is completed. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] The 4D work completion and pricing system is primarily used for work completion and pricing in railway projects, as well as for project planning management. It can also be used for labor work completion and pricing by various construction units and for internal work completion and pricing within enterprises. The system supports simultaneous online editing and review by multiple users, automatic printing of reports with electronic signatures, pricing based on detailed quantities of work points, automatic summary and statistics across multiple contract sections (or work areas), comparative analysis of work completion and pricing, construction plans, and actual completion, and automatic statistical analysis of daily, ten-day, and monthly reports on construction completion status.

[0035] This application's system uses BIM components as the smallest unit and connects the bill of quantities, schedule, and quality databases using WBS coding. It automatically triggers "quantity-price-schedule" verification along the construction timeline, achieving 4D (3D+Time) digital construction verification with automatic quantity calculation, online verification submission, and one-click payment. The 4D construction verification and pricing method in this application uses a system that integrates "BIM components + timeline + bill of quantities unit price," enabling construction completion → automatic model quantity calculation → online verification → one-click payment, thus achieving integrated 4D digital construction verification of railway engineering in terms of "quantity, price, and time."

[0036] This application discloses a 4D railway construction verification and pricing method based on a BIM model, including the following steps:

[0037] S1: Establish a standard for the relationship between BIM model WBS coding and list item coding to form a unique language for subsequent operations.

[0038] Specifically, the relationship between BIM model WBS coding and bill of quantities (BOQ) item coding has an independent mapping method, which is based on the characteristics and structural properties of the project. That is, the BIM platform directly references the "section-item-inspection lot" division table in the specifications and the nine-digit BOQ code in GB / T 51301, establishing a one-to-one mapping of component-task-BOQ through "name standardization + part code extension," achieving "model division = specification division," and automatically corresponding to quantity surveying, work verification, and payment.

[0039] S2: Import Bill of Quantities and Corresponding Inspection Batches: Perform one-click import to automatically link each quantity in the bill of quantities to the corresponding inspection batch, providing a data foundation for subsequent automatic quantity calculation, progress tracking, and payment settlement.

[0040] Specifically, step S2 involves generating the bill of quantities into a platform database file in one go.

[0041] S3: After all the procedures for an inspection batch are completed, the inspection batch enters the pending confirmation state: mobile phone data entry, online approval, and status locking are performed in sequence.

[0042] Specifically, in step S3, the next step cannot proceed until the previous step is completed during the batch inspection process. Once the batch is qualified, the platform automatically marks it with a "pending confirmation" label, ensuring timely batch inspection management without any delays.

[0043] S4: Before quarterly pricing, a final check and confirmation is performed; all "pending confirmation" inspection batches are centrally reviewed, confirmed with one click or manually removed / corrected, and an official pricing list is generated.

[0044] S5: Select the year and quarter in the confirmed inspection batch, export the unit project price list for each sub-section, export the joint inspection work pricing list, export the quantity list for each sub-section, and export the price list for each sub-section.

[0045] Specifically, the standard reports include detailed breakdowns of items, summary tables, quantities tables, and pricing tables containing unit prices and total prices. They are used directly for quantity reporting, verification, and payment without the need for secondary processing.

[0046] S6: Create a new online process for work verification and pricing: Import the quantity table, automatically calculate the cumulative start-up and annual data, and the platform pushes the documents to be signed to the corresponding responsible person's to-do list according to the approval process, and then signs and stamps them.

[0047] Specifically, in step S6, during the online review of the pricing process for documents awaiting signature, the document can be rejected at any time, and can be revised and re-processed, with the entire process leaving a trace.

[0048] Specifically, the signature supports CA certificates, and once signed, it cannot be tampered with.

[0049] Specifically, in the automatic filling of standard forms, the forms are automatically generated. The system automatically fills in the standard forms according to the inspection batches confirmed in step five, without the need for manual typing. If there are changes outside the list, you only need to add them in the "Change Management" module, and the system will re-summarize them to ensure that the quantity and price are consistent.

[0050] Specifically, the platform pushes documents to be signed to the to-do list of the corresponding responsible person based on role permissions, and the mobile app can approve, reject, and annotate them.

[0051] Specifically, once all signatures are completed, the system automatically generates a formal pricing document with a QR code, which serves as the sole basis for requesting payment from the owner and for accounting purposes.

[0052] S7: After the work verification and pricing process is completed, a new consortium split table and payment application form are created: the "quarterly work verification and pricing amount" is automatically split to each member unit of the consortium, and the online payment application is triggered simultaneously, so that the three steps of "pricing-split-payment" can be completed in one go.

[0053] Specifically, step 7 includes the following steps: One-click splitting: The system reads the finalized quarterly work verification and pricing total amount, and automatically generates a "Quarterly Splitting Table" according to the consortium agreement (proportion or list ownership), and each member unit confirms and stamps it online; Synchronous payment request: Once the splitting table is locked, the corresponding share immediately generates a "Payment Application Form" for each member unit, without the need for secondary entry; Electronic signature closed loop: After the payment unit completes the four-level electronic signature of "business-contract-finance-legal person" in sequence, the platform automatically summarizes and forms a "Payment Ledger", which is directly connected to the financial shared system for payment.

[0054] Specifically, in step 7, the consortium is split up before the payment is made.

[0055] like Figure 1 As shown, the workflow of the railway 4D inspection and valuation method based on BIM model in this application is as follows:

[0056] 1. Develop railway 4D inspection WBS codes based on BIM models for each specialty. According to the "Delivery Accuracy Standard", all nine major specialties such as roadbed, bridge, and track are broken down into a three-way correspondence of "model unit - WBS item - unique component code" to form a "common language" that can be identified in subsequent quantity calculation, schedule, and pricing.

[0057] 2. Importing the Bill of Quantities: Download the platform template → Paste the bill of quantities exported from the quantity calculation software into it → Import with one click, and the system will automatically bind each quantity to the corresponding sub-item inspection batch.

[0058] 3. Inspection batch process completed and enters the pending confirmation state: Fill out the inspection batch form on-site using mobile phone → Online approval → The process ends and is automatically set to "pending confirmation", locking the qualified work quantity and amount of this batch, which cannot be changed by anyone.

[0059] 4. Final verification and confirmation before quarterly pricing: After the owner issues the pricing notice, the platform will review all "pending confirmation" inspection batches in batches; if removal or correction is required, manual adjustment can be made, and finally the official pricing range for the quarter can be confirmed with one click.

[0060] 5. Export the system's work verification pricing and quantity tables: Select the year and quarter → the system will automatically output 4 types of standard reports (detailed breakdown of items, summary table, pure quantity table, and price table), which can be directly used for auditing and reporting quantities.

[0061] 6. Create a new online process for work verification and pricing: The platform automatically generates 11 pricing forms using the confirmed data → online circulation of 20+ signature nodes (construction, supervision, construction, cost, safety and quality, materials, leadership) → once the electronic seal is affixed, a formal pricing document with a QR code is generated.

[0062] 7. Create a new consortium split table and fund application form: After the total valuation amount is confirmed, the system automatically generates a split table according to the consortium agreement → each member unit affixes its seal online → simultaneously triggers fund application for each division → four-level electronic signature is completed → payment ledger is generated, and finance makes payment with one click.

[0063] In summary, the process is interconnected, achieving a fully digital closed loop encompassing "model-workload-schedule-quality-pricing-payment".

[0064] Example 1: Construction of a new railway branch line to Toumen Port

[0065] Step 1: Establish a standard for the relationship between the unique component code of the BIM model and the WBS code.

[0066] ① Decompose the primary and secondary structures to make them consistent with the primary and secondary structures of the model units specified in the "Standard for Delivery Accuracy of Railway Engineering Information Model".

[0067] ② Develop a WBS unique component code and list item comparison table for each unit project.

[0068] Step 2: Import the bill of quantities and match it with the inspection batches of each item.

[0069] ① A detailed list of quantities for the project.

[0070] ② Open the process management sub-item list.

[0071] ③ Download the import template from all options.

[0072] ④ Modify the bill of quantities according to the imported template format.

[0073] ⑤ In the All Options, click Import, and in the pop-up window, select the edited bill of quantities.

[0074] ⑥ Verify the import status and supplement any omissions.

[0075] Step 3: The inspection batch process is completed and enters the pending confirmation state, such as... Figure 6 As shown:

[0076] ① Fill out the process inspection batch form on-site and conduct process approval.

[0077] ②After the inspection batch process is completed, it enters the pending confirmation state.

[0078] Step 4: Conduct a final verification and confirmation before quarterly pricing.

[0079] ①After the owner issues the quarterly pricing notice, the inspection batches in the pending confirmation status are reviewed.

[0080] ② After the review is completed, confirm one item. If there are any inspection batches that do not need to be priced this time or have incorrect basic data, manually change the pricing time and basic data information.

[0081] Step 5: Export the pre-calculated 4D work measurement and evaluation tables from the system.

[0082] ① Click the export button in the confirmed list of sub-items.

[0083] ② Select the year, quarter, and export type to be exported. There are four types: export by sub-items, export summary table, export quantity table, and export price table.

[0084] Step Six: Create a new online process for work verification and pricing.

[0085] like Figure 2 , Figure 3 As shown:

[0086] ① Open the pricing management system and create a new work verification pricing process in the general contracting fee pricing.

[0087] ② The compiler shall fill in the following forms in sequence: Inspection and Valuation Approval Form → 1-1 Completed Qualified Work Quantity Table → 1-2 Inspection Quantity Summary Table (Total within and outside the Bill of Quantities) → 1-3 Inspection Quantity Details Table → 2-1 Inspection and Valuation Table → 2-2.1 Inspection and Valuation Chapter Summary Table (Total within and outside the Bill of Quantities) → 2-2.2 Inspection and Valuation Summary Table (Total within and outside the Bill of Quantities) → 2-3 Inspection and Valuation Summary Table (Total within the Bill of Quantities) → 2-5 Inspection and Valuation Details Table within the Bill of Quantities.

[0088] ③ After the above forms are completed, proceed to the signature and review process: Signature of the person reviewing the quantity sheet → Signature of the person reviewing the price sheet → Signature of the chief engineer → Signature of the project manager → Stamp of the construction unit's office → Signature of the supervising engineer → Signature of the chief supervising engineer → Stamp of the supervision unit's office → Signature of the construction unit's first to eleventh professional engineers → Signature of the cost consulting engineer → Signature of the professional engineer of the safety and quality department → Signature of the engineering department head → Signature of the budget engineer → Signature of the head of the planning department → Signature of the head of the safety and quality department → Signature of the head of the materials and equipment department → Signature of the deputy general manager in charge → Signature of the general manager → Signature of the chairman → Stamp of the construction unit's office → End of process.

[0089] Step 7: After the completion of the work verification and valuation process, create a new consortium breakdown table and a payment application form.

[0090] like Figure 4 , Figure 5 As shown:

[0091] ① Open the payment management section and create new payment applications for each division of the consortium in the construction payment application section.

[0092] ② Fill out the quarterly allocation form → All construction units in the consortium affix their seals → The specific construction unit using the funds prepares and fills out the fund application → The head of the department of the fund-using unit signs → The person in charge of the contract of the fund-using unit signs → The person in charge of the fund-using unit signs → The person in charge of the fund-using unit signs → The fund-using unit affixes its seal → The process ends and a payment ledger is generated.

[0093] In summary, the technical solution of this application has the following beneficial effects:

[0094] 1. This application presents a railway 4D inspection and pricing system based on a BIM model. Through the association technology between the WBS coding system and the bill of quantities coding, it can establish the relationship between the component attributes of the BIM model and the bill of quantities, ensuring accurate matching between the bill of quantities and the actual parts. By using the association relationship between the bill of quantities and the WBS, as well as the transmitted progress, procedures, and rectification status of safety and quality issues, the system can quickly filter out the period that meets the current measurement requirements. Based on the model quantity, the system automatically calculates the inspection quantity for the current period, realizing the function of intelligent 4D inspection.

[0095] 2. The railway 4D inspection and valuation method based on BIM model proposed in this application has the following advantages:

[0096] 1) Automatic Calculation and Export of Work Quantities: The 4D Work Inspection and Pricing System can automatically determine the completion status of inspection batches and export the corresponding work quantities in the bill of quantities format. This reduces tedious manual operations and improves work efficiency. The system can automatically calculate the current period's inspection quantity based on the relationship between the bill of quantities and the Work Breakdown Structure (WBS) and the completion status of inspection batches, avoiding potential errors caused by manual calculation.

[0097] 2) Reduced Data Errors and Biases: Through automated data calculation, the 4D inspection and pricing system can reduce data errors and biases, improving pricing accuracy. The system is based on accurate models and inspection batch progress status information, reducing errors caused by human operation and data entry.

[0098] 3) Information Sharing and Collaboration: Standardized collaborative management actions facilitate the expansion of BIM technology applications and enhance project collaborative management capabilities. The 4D work completion and cost assessment system enables information sharing and collaboration. Through the correlation between WBS and model data, the system can integrate relevant data from modules such as processes, schedules, and quality, achieving information sharing and collaboration between various stages, improving project management efficiency, and reducing information silos.

[0099] 4) Cost Transparency: The 4D work measurement and pricing system enables cost transparency, facilitating effective control and management of various expenses. The system clearly records and tracks the quantity and corresponding cost of each component, making the cost situation clear at a glance and easy to monitor and manage.

[0100] 5) Data Visualization: Data visualization is an indispensable and important component of data analysis. The 4D work measurement and pricing system can visualize data, providing managers with real-time data for decision-making. Through the system's visual interface and reports, users can intuitively understand the status of various indicators such as project volume, costs, and progress, helping to make accurate decisions and adjustments.

[0101] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A railway 4D inspection and pricing method based on BIM model, characterized in that, Includes the following steps: S1: Establish a standard for the relationship between BIM model WBS coding and list item coding to form a unique language for subsequent operations; S2: Import Bill of Quantities and Corresponding Inspection Batches: Perform one-click import to automatically link the quantity of each bill of quantities to the corresponding inspection batch, providing a data foundation for subsequent automatic quantity calculation, progress tracking, and payment settlement; S3: All procedures for the inspection batch are completed, and the inspection batch enters the pending confirmation state: proceed with mobile phone data entry, online approval, and status locking in sequence; S4: Final verification and confirmation before quarterly pricing; centralized review of all "pending confirmation" inspection batches, one-click confirmation or manual removal / correction, generating the official pricing list for the quarter; S5: Select the year and quarter in the confirmed inspection batch, export the unit project price list for each sub-section, export the joint inspection work pricing list, export the quantity list for each sub-section, and export the price list for each sub-section within the system. S6: Create a new online process for work verification and pricing: Import the quantity table, automatically calculate the data including cumulative start-up and annual cumulative data, and push the documents to be signed to the corresponding responsible person's to-do list according to the approval process for signature and stamping. S7: After the work verification and pricing process is completed, a new consortium split table and payment application form are created: The "quarterly work verification and pricing amount" is automatically split to each member unit of the consortium, and the online payment application is triggered simultaneously, realizing the three steps of "pricing-split-payment" are completed in one go.

2. The railway 4D inspection and pricing method based on BIM model according to claim 1, characterized in that, The relationship between the BIM model WBS coding and the list item coding has an independent mapping method, which is mapped according to the characteristics and structural properties of the project.

3. The railway 4D inspection and pricing method based on BIM model according to claim 1, characterized in that, In step S3, the next step cannot proceed until the previous step is completed during the batch inspection process management. Once the batch is qualified, the platform automatically marks it with a "pending confirmation" label, ensuring timely batch inspection management without any delays.

4. The railway 4D inspection and pricing method based on BIM model according to claim 1, characterized in that, In step S5, the standard report includes a detailed list of sub-items, a summary table, a quantity table, and a pricing table containing unit prices and total prices. It is directly used for quantity reporting, verification, and payment without secondary processing.

5. The railway 4D inspection and pricing method based on BIM model according to claim 1, characterized in that, In step S6, during the online review of the pricing process for documents awaiting signature, the document can be rejected at any time, and if rejected at any node, it can be modified and re-processed, with the entire process leaving a trace.

6. The railway 4D inspection and pricing method based on BIM model according to claim 1, characterized in that, In step S6, the signature supports CA certificates and is signed and cannot be tampered with.

7. The railway 4D inspection and pricing method based on BIM model according to claim 1, characterized in that, Step 7 specifically includes the following steps: One-click splitting: The system reads the finalized quarterly work completion and pricing total amount, automatically generates the "Quarterly Splitting Table" according to the consortium agreement, and each member unit confirms and stamps it online; Synchronous payment request: Once the splitting table is locked, the corresponding share immediately generates the "Payment Application Form" for each member unit, without the need for secondary entry; Electronic signature closed loop: The platform automatically summarizes and forms the "Payment Ledger", directly connecting to the financial shared system for payment.

8. The railway 4D inspection and pricing method based on BIM model according to claim 1, characterized in that, In step 7, the consortium is split up before the payment is made.

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