Fine calculation method and system for raft slab steel of secondary sedimentation tank based on BIM technology

Abstract

The application discloses a two-sedimentation-tank raft plate steel bar fine calculation method and system based on BIM technology. The relatively complex structure form of the two-sedimentation-tank is decomposed into three parts, i.e. a whole inclined raft plate, a raft plate outer expansion part at a water pipe and a ring-shaped inclined slope type catch basin. Through the implementation of the innovative methods, such as the setting of the component elevation in the whole inclined raft plate, the drawing calculation of the multi-region ring-shaped steel bars and the radial steel bars, the drawing of the holes in the raft plate outer expansion part and the fine adjustment of the built-in steel bars in the ring-shaped inclined slope type catch basin, the problem that the current BIM calculation software cannot model and calculate the special-shaped components and the complex nodes in the two-sedimentation-tank engineering, i.e. the fine adjustment calculation of the steel bars, is solved.

Description

Technical Field

[0001] This invention belongs to the field of building construction, specifically relating to a method and system for refined quantity calculation of steel reinforcement in a secondary sedimentation tank raft slab based on BIM technology. Background Technology

[0002] The construction cost industry is receiving increasing attention, reflected in all aspects of social economy and life. Construction costs are attracting unprecedented attention from government-invested projects, corporate-invested projects, foreign-invested projects, privately-invested projects, and construction contractors. Currently, whether it's investment estimation, preliminary budget, budget, or settlement, everything is closely related to "work volume," and no construction cost can exist independently of "work volume." Therefore, to determine and control construction costs effectively, strong emphasis must be placed on the fundamental work of quantity surveying, which is extremely important in construction cost management. In the context of the vigorous development of BIM technology, the integration of traditional construction cost estimation with BIM technology is an inevitable trend and a necessary condition for accurate quantity surveying. Currently, various BIM modeling and quantity surveying software are flourishing in the market, primarily developed and optimized for building construction projects. In addition, due to software technology development issues or software engineers' lack of in-depth understanding of relevant professional engineering specifications and rules, the development of BIM modeling and quantity calculation software for metallurgical municipal engineering and environmental engineering is not thorough enough, and it cannot meet the actual usage requirements of engineering participants.

[0003] Secondary sedimentation tanks are an important component of wastewater treatment systems, significantly impacting effluent quality and the concentration of returned sludge. Given the unconventional structural design characteristics of such projects, current BIM quantity calculation software offers very little support for non-building construction projects like secondary sedimentation tanks. Furthermore, the conventional intelligent operation methods of these BIM quantity calculation software programs are completely incompatible with the structural features of secondary sedimentation tank drawings.

[0004] For the reasons mentioned above, it is impossible to use conventional methods to display the three-dimensional structure of special nodes and their reinforcement and calculate the engineering quantity. Usually, the engineering quantity of the secondary sedimentation tank is only completed by traditional manual calculation or by a combination of semi-automatic and semi-manual calculation. The BIM refined quantity calculation technology cannot fully reflect this, which affects the data transmission with the BIM5D platform in the later stage. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method and system for refined calculation of reinforcement of secondary sedimentation tank raft slab based on BIM technology, which solves the problem that the structure of secondary sedimentation tank is too complex to be drawn and calculated using existing BIM software.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] The method for calculating the quantity of a ring-shaped sloping sump in a secondary sedimentation tank involves several steps. First, using component substitution, a new irregularly shaped panel is created. The outline of the ring-shaped sump is then drawn in the cross-sectional reinforcement drawing using the irregularly shaped editor. After completion, it is renamed "Sump." Second, the internal reinforcement is further edited in the cross-sectional shape. The upper reinforcement is derived from the upper reinforcement of the raft foundation, and the lower reinforcement is derived from the lower reinforcement of the raft foundation. The horizontal reinforcement is arranged according to the specified range. Finally, the reinforcement data for this section is calculated. This method replaces the conventional parametric sump drawing function, which lacks certain features.

[0008] The reinforcing bars inside the annular sloping water collection pit of the secondary sedimentation tank are arranged along the slope of the component and connected with the reinforcing bars of the raft foundation to form a complete reinforcing mesh for the raft foundation. The precise reinforcing bar quantity data for this part is obtained based on the three-dimensional model.

[0009] The calculation method for the extended portion of the raft foundation for the secondary sedimentation tank is as follows: First, the extended portion of the foundation is divided according to the cross-sectional reinforcement drawing. The outline of the extended portion of the raft foundation, which connects to the sloping sump in the cross-sectional reinforcement drawing, is edited using a custom-line interface editor, and its top elevation is placed in the corresponding position according to the design requirements of the drawings. Second, based on the specifications of the sludge pipes, the dimensions of the extended portion of the raft foundation, and the spatial position of the pipe openings within the extended portion of the foundation, the CAD drawing function in the BIM software is used to draw the cross-sectional view of the extended portion of the foundation beam with openings on the drawing interface. Then, the aforementioned foundation beam with openings is edited through the new irregular foundation beam interface and drawn according to the relevant position on the secondary sedimentation tank plan. The starting and ending top elevations of the extended portion are adjusted, and the engineering quantity data for deducting the space occupied by the sludge pipe openings is calculated. Finally, the geometric engineering quantity data of the extended portion of the raft foundation with inlet pipes in all cross-sectional reinforcement drawings are drawn and calculated using the above method.

[0010] A refined method for calculating the reinforcement of secondary sedimentation tank raft slabs based on BIM technology includes the following steps:

[0011] Step 1: Decompose the secondary sedimentation tank structure into three parts: the overall inclined raft slab, the raft slab extension at the water pipe, and the annular sloping water collection pit.

[0012] Step 2: Draw the preliminary outline of the secondary sedimentation tank components, and divide and combine the raft foundation multiple times to form the layout range of its internal steel reinforcement, so that the radial steel reinforcement extends to the edge of the sump and connects with the longitudinal steel reinforcement at the sump to form a complete raft foundation steel reinforcement mesh.

[0013] Step 3: Draw the annular sloping water collection pit and make fine adjustments to the internal steel reinforcement. Apply the engineering quantity calculation method for the annular sloping water collection pit of the secondary sedimentation tank to calculate the steel reinforcement data for this part.

[0014] Step 4: Draw the hole model of the outer expansion part of the secondary sedimentation tank raft foundation, and use the above-mentioned method for calculating the engineering quantity of the outer expansion part of the secondary sedimentation tank raft foundation to calculate the concrete data of this part.

[0015] Step 5: Calculate the overall engineering quantity data of the secondary sedimentation tank raft.

[0016] The specific process of drawing the preliminary outline of the secondary sedimentation tank components is as follows:

[0017] First, draw the circular raft foundation according to the requirements of the bottom plan of the secondary sedimentation tank;

[0018] Secondly, the circular raft foundation is divided into quarter-circles, and the elevation of each quarter-circle raft foundation is set according to the elevation of the inclined raft.

[0019] Then, after its elevation is set, according to the bottom plan layout, the position of the annular sloping water collection pit in the raft foundation is divided into sections according to the design dimensions shown in the figure, and the cut-off part is used as the bottom plate of the water collection pit.

[0020] Finally, adjust the top elevation of the raft slab according to the data shown in the diagram and place it in the designated position.

[0021] Step 2 involves multiple divisions and combinations of the raft foundation, including the following steps:

[0022] Step a: According to the design requirements of the drawings, the radial reinforcement of the upper part of the raft foundation is arranged in multiple areas. The raft foundation is divided into areas according to the starting point, center, and end point.

[0023] Step b: Select any one of the quarter-circular raft foundations, and use the multi-slab or single-slab method and the function of arranging radial reinforcement at the center to draw and calculate the upper radial reinforcement in each area in sequence. Use the reinforcement locking function to fix the calculated radial reinforcement. After drawing, merge the raft foundations of the divided areas.

[0024] Step c: Draw, calculate, and lock the lower radial reinforcement in all areas of the raft foundation according to the method in step b;

[0025] Step d: Arrange the upper and lower circumferential reinforcement bars, divide the previously merged raft foundation again, and then use the multi-slab arrangement and parallel edge function to perform multi-area arrangement calculations for the upper and lower circumferential reinforcement bars, and lock the reinforcement bars.

[0026] A BIM-based system for refined quantity calculation of reinforcement in secondary sedimentation tank raft foundations includes modules for drawing and calculating the overall inclined raft foundation, the extended portion of the raft foundation, and the annular sloping sump.

[0027] The overall inclined raft foundation drawing and calculation module is used to set the component elevation and draw and calculate the ring reinforcement and radial reinforcement in multiple areas.

[0028] The raft foundation expansion section drawing and calculation module is used to draw the holes in the expansion section of the raft foundation and calculate the engineering quantity of the section excluding the holes;

[0029] The module for drawing and calculating the annular sloping sump pit uses irregularly shaped panels to define and draw the outline of the annular sloping sump pit, then edits the built-in reinforcement and performs calculations.

[0030] The module for drawing and calculating the extended portion of the raft foundation consists of two parts: one part is the drawing and calculation of the outline of the extended portion of the raft foundation that is adjacent to the sloping sump in the cross-sectional reinforcement drawing, and the other part is the drawing and calculation of the extended portion of the raft foundation with the water inlet pipe in the cross-sectional reinforcement drawing.

[0031] The elevations are all set according to the relative elevations converted from the elevation datum.

[0032] The elevation datum is -0.029.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The complex structure of the secondary sedimentation tank was decomposed into three main parts: the overall inclined raft slab, the extended portion of the raft slab at the water pipes, and the annular sloping sump. Through innovative methods such as setting component elevations within the overall inclined raft slab, calculating and drawing multi-regional annular and radial reinforcing bars, drawing holes in the extended portion of the raft slab, and fine-tuning the internal reinforcing bars of the annular sloping sump, the problem of current BIM software being unable to model and calculate quantities (fine-tuning reinforcement adjustment calculations) for irregular components and complex nodes in secondary sedimentation tank projects was solved.

[0035] 2. For more complex and special non-building construction projects, manual calculation methods or a combination of computerized and manual methods have greatly improved the efficiency of quantity calculation, narrowed the difference between the quantity budgeted in the construction drawings and the actual quantity found on site, solved the shortcomings of existing BIM quantity calculation software, provided accurate data support for all parties involved in the project, and made the tedious work of quantity calculation for unconventional components simple and orderly, greatly improving work efficiency, reducing the workload of budget personnel, and improving industry productivity and project cost quality.

[0036] 3. By leveraging the functions of existing software, combined with professional drawing sets, drawing specifications, and flexible combination modeling methods, we can achieve the goal of refined quantity calculation and meet market demands. Attached Figure Description

[0037] Figure 1This is a schematic diagram of the segmentation of the circular raft foundation of the present invention.

[0038] Figure 2 This is a schematic diagram showing the division of the bottom plate of the annular sloping water collection pit into the raft plate of the present invention.

[0039] Figure 3 This is a schematic diagram showing the division of the radial reinforcement arrangement range on the upper part of the raft foundation of the present invention.

[0040] Figure 4 This is a schematic diagram showing the division of the raft foundation ring reinforcement arrangement range according to the present invention.

[0041] Figure 5 This is a schematic diagram showing the arrangement range of the upper and lower ring reinforcing bars of the raft slab of the present invention.

[0042] Figure 6 These are three-dimensional renderings of the upper and lower layer ring-shaped reinforcing bars on the raft foundation with different layout areas according to the present invention.

[0043] Figure 7 This is a three-dimensional rendering of the complete steel reinforcement system consisting of radial and ring-shaped reinforcing bars in the secondary sedimentation tank raft foundation of the present invention.

[0044] Figure 8 This invention provides a schematic diagram of the outline of a ring-shaped sloping water collection pit drawn in the irregular panel editor.

[0045] Figure 9 This is a schematic diagram of the annular sloping water collection pit model of the present invention.

[0046] Figure 10 A schematic diagram of the accurate three-dimensional model of the reinforcing bars obtained after the calculation is completed for this invention.

[0047] Figure 11 This is a schematic diagram of the outer extension of the steel reinforcement section and the sump pit, drawn using custom lines according to the present invention.

[0048] Figure 12 This invention utilizes the CAD drawing function to create a cross-sectional view of the outer expansion portion of a foundation beam with holes.

[0049] Figure 13 This invention utilizes the cross-sectional view of the raft slab expansion portion and sludge pipe in the edited cross-sectional view of the irregular foundation beam.

[0050] Figure 14 This is a three-dimensional rendering of the cross-sectional raft plate extension and sludge pipe of the present invention.

[0051] Figure 15 This is a three-dimensional rendering of the overall raft foundation of the secondary sedimentation tank of the present invention.

[0052] Figure 16 This is a cross-sectional view of the reinforcing steel bars in this invention (1-1).

[0053] Figure 17 This is a cross-sectional view of the reinforcing steel bars in this invention (section 2-2). Detailed Implementation

[0054] The structure and working process of the present invention will be further described below with reference to the accompanying drawings.

[0055] The purpose of this invention is to break through the existing technical barriers to computerized quantity calculation in engineering projects. Based on the conventional operation of BIM quantity calculation software, this invention flexibly combines and applies the operation methods to summarize a set of effective ideas and methods for BIM modeling and quantity calculation, in order to solve the problem of difficult quantity calculation in non-building engineering projects such as municipal engineering and environmental engineering.

[0056] Secondary sedimentation tanks are a crucial component of wastewater treatment systems, significantly impacting effluent quality and the concentration of returned sludge. Given the unconventional structural design characteristics of such projects, current BIM quantity calculation software offers limited support for non-building structures like secondary sedimentation tanks. Furthermore, the conventional intelligent operation methods of these software programs are completely incompatible with the structural features of secondary sedimentation tank drawings. For these reasons, it is impossible to calculate the 3D representation and quantities of special nodes and their reinforcement using conventional methods. Typically, secondary sedimentation tank quantities are calculated manually or through a combination of manual and electronic methods, failing to fully capture the precise dimensions required by BIM technology, thus hindering data transmission with the BIM5D platform. To address these issues, our BIM team, through continuous exploration, research, and repeated practice comparing drawings, has developed an effective BIM-based method and system for precise reinforcement quantity calculation in secondary sedimentation tanks. This system ensures that the 3D reinforcement model meets the design specifications and node requirements. Compared to traditional manual calculation methods or a combination of computerized and manual methods, this method greatly improves the efficiency of engineering quantity calculation, narrows the difference between the quantity budgeted in the construction drawings and the actual quantity found on site, solves the shortcomings of existing BIM quantity calculation software, and provides accurate data support for all parties involved in the project.

[0057] The calculation method for the quantity of the annular sloping sump in the secondary sedimentation tank is as follows: First, create a new irregular-shaped slab and use the irregular shape editor to draw the outline of the annular sloping sump in the cross-sectional reinforcement drawing. After completion, rename it as "sump". Second, continue to edit the built-in reinforcement in the cross-sectional shape. The upper reinforcement is the upper reinforcement of the raft foundation, and the lower reinforcement is the lower reinforcement of the raft foundation. The horizontal reinforcement is arranged according to the layout range. Finally, draw and calculate the reinforcement data for this part.

[0058] The calculation method for the extended portion of the raft foundation for the secondary sedimentation tank is as follows: First, the extended portion of the foundation is divided according to the cross-sectional reinforcement drawing. The outline of the extended portion of the raft foundation, which connects to the sloping sump in the cross-sectional reinforcement drawing, is edited using a custom-line interface editor, and its top elevation is placed in the corresponding position according to the design requirements of the drawings. Second, based on the specifications of the sludge pipes, the dimensions of the extended portion of the raft foundation, and the spatial position of the pipe openings within the extended portion of the foundation, the CAD drawing function in the BIM software is used to draw the cross-sectional view of the extended portion of the foundation beam with openings on the drawing interface. Then, the aforementioned foundation beam with openings is edited through the new irregular foundation beam interface and drawn according to the relevant position on the secondary sedimentation tank plan. The starting and ending top elevations of the extended portion are adjusted, and the engineering quantity data deducted from the space occupied by the sludge pipe openings is calculated. Finally, the engineering quantity data of the extended portion of the raft foundation with inlet pipes in all cross-sectional reinforcement drawings are calculated using the above method.

[0059] A refined method for calculating the reinforcement of secondary sedimentation tank raft slabs based on BIM technology includes the following steps:

[0060] Step 1: Decompose the secondary sedimentation tank structure into three parts: the overall inclined raft slab, the raft slab extension at the water pipe, and the annular sloping water collection pit.

[0061] Step 2: Draw the preliminary outline of the secondary sedimentation tank components, and divide and combine the raft foundation multiple times to form the layout range of its internal steel reinforcement, so that the radial steel reinforcement extends to the edge of the sump and connects with the longitudinal steel reinforcement at the sump to form a complete foundation steel reinforcement mesh.

[0062] Step 3: Draw the annular sloping water collection pit and make fine adjustments to the internal steel reinforcement. Apply the engineering quantity calculation method for the annular sloping water collection pit of the secondary sedimentation tank to calculate the steel reinforcement data for this part.

[0063] Step 4: Draw the hole model of the outer expansion part of the secondary sedimentation tank raft foundation, and use the above-mentioned method for calculating the engineering quantity of the outer expansion part of the secondary sedimentation tank raft foundation to calculate the concrete data of this part.

[0064] Step 5: Calculate the overall engineering quantity data of the secondary sedimentation tank raft.

[0065] A BIM-based system for refined quantity calculation of reinforcement in secondary sedimentation tank raft foundations includes modules for drawing and calculating the overall inclined raft foundation, the extended portion of the raft foundation, and the annular sloping sump.

[0066] The overall inclined raft foundation drawing and calculation module is used to set the component elevation and draw and calculate the ring reinforcement and radial reinforcement in multiple areas.

[0067] The raft foundation expansion section drawing and calculation module is used to draw the holes in the expansion section of the raft foundation and calculate the engineering quantity of the section excluding the holes;

[0068] The module for drawing and calculating the annular sloping sump pit uses irregularly shaped panels to define and draw the outline of the annular sloping sump pit, then edits the built-in reinforcement and performs calculations.

[0069] Specific embodiments, such as Figures 1 to 17 As shown,

[0070] This embodiment addresses the challenge of efficiently and intelligently importing planar structural drawings into software for secondary sedimentation tank projects, unlike conventional building construction. It decomposes the complex structure of the secondary sedimentation tank into three main parts: an overall inclined raft slab, the raft slab extension at the water pipes, and a ring-shaped sloping sump. By implementing innovative methods such as setting component elevations within the overall inclined raft slab, calculating and drawing multi-regional ring and radial reinforcement, drawing holes in the raft slab extension, and finely adjusting the internal reinforcement of the ring-shaped sump, this embodiment solves the problem that current BIM software cannot model and calculate quantities (fine-grained reinforcement adjustment calculations) for irregularly shaped components and complex nodes in secondary sedimentation tank projects.

[0071] The detailed steps of the BIM-based method for refining the reinforcement of the secondary sedimentation tank raft slab are as follows:

[0072] ① Based on the bottom plan layout of the secondary sedimentation tank, draw a circular raft foundation with a thickness of 550mm (H) and a radius of 12800mm (R). Divide the circular raft foundation into quarter-semicircles, and set the elevation of each quarter-circle foundation according to the elevation of the inclined raft foundation. Note that this project adopts the 1985 National Elevation Standard, with an elevation datum of -0.029. The elevations of the secondary sedimentation tank raft model are all relative elevations converted according to this datum. After the elevation is set, according to the bottom plan layout, divide the raft foundation according to its design dimensions (R1000mm) for the position of the annular sloping sump in the raft foundation. The cut portion serves as the sump bottom plate. Adjust the top elevation of the raft foundation according to the data shown in the drawing and place it in the designated position. The purpose of this step is to describe the main components and preliminary outline of the secondary sedimentation tank, laying the groundwork for subsequent operations related to the raft foundation.

[0073] ② After the preliminary outline of the secondary sedimentation tank raft foundation components is completed, the raft foundation needs to be divided and combined multiple times to solve the problem of arranging different types of reinforcement in multiple areas. According to the design requirements of the drawings, the radial reinforcement of the upper part of the raft foundation is arranged in multiple areas of R12800mm, R5700mm-12800mm, and R2500-12800mm. The raft foundation is divided into areas according to the starting point, center, and ending point. For a quarter-circular raft foundation, the upper radial reinforcement (C16@600) within a radius of 12800mm is calculated using a multi-slab method and a center-centered radial reinforcement function. To prevent duplicate calculations and inconsistent data in subsequent operations, the calculated radial reinforcement is locked using the reinforcement locking function. Afterward, the same method is used to calculate the upper radial reinforcement (C16@300) within a radius of 2500-12800mm using the same multi-slab method and a center-centered radial reinforcement function. For the upper radial reinforcement within a radius of 5800-12800mm (C16@600)mm, a single-slab method and a center-centered radial reinforcement function are used for calculation and locking. After completing the upper radial reinforcement of the raft foundation, the divided raft foundation areas are merged to facilitate subsequent division of the lower radial reinforcement and circumferential reinforcement areas. Similarly, following the above operating method, the lower radial reinforcement within the ranges of R12800mm (C20@600), R5700-12800mm (C20@300), and R2500-12800mm (C20@600) of the raft foundation is drawn, calculated, and locked. Finally, the upper and lower circumferential reinforcement is arranged. The previously merged raft foundation is again divided into two ranges: R2000mm-R6400mm and R6400mm-R12800mm. Then, using the multi-slab arrangement and parallel edge functions, the upper and lower circumferential reinforcements are arranged in multiple areas, calculated, and locked. This step is a conventional method, playing a crucial role in this patent. Its main purpose is to divide and combine the raft foundation multiple times through the multi-area arrangement range of the upper and lower radial and circumferential reinforcements to form the arrangement range of its internal reinforcement. Then, the reinforcement is drawn and calculated so that the radial reinforcements extend to the edge of the sump and connect with the longitudinal reinforcement at the sump, forming a complete foundation reinforcement mesh.

[0074] ③ The process involves drawing a ring-shaped sloping sump and fine-tuning the internal reinforcement. Current BIM software only allows drawing vertical wellhead-type sumps and lacks the function to directly define, draw, calculate, and adjust the internal reinforcement along the slope. Therefore, a custom modeling method is used, defining and drawing the sump using a non-standard panel. This step is one of the core value points of this patent. First, a new non-standard panel is created. Using the non-standard editor, the outline of the ring-shaped sump is drawn in the 1-1 reinforcement section view. After completion, it is renamed "Sump." The internal reinforcement is then edited in the section shape. The upper reinforcement is the extension of the upper reinforcement of the raft foundation, so it is edited and drawn using C16@600. The lower reinforcement is the extension of the lower reinforcement of the raft foundation, so it is edited and drawn using C20@600. The horizontal reinforcement is C20@150 and arranged according to the layout range. Finally, the calculation data for this part is obtained. The purpose of this step is to address the shortcomings of current BIM software in drawing annular sloping sump pits and performing detailed calculations of reinforcement adjustments by using a customized modeling method. By drawing annular sloping sump pits, the built-in reinforcement is precisely arranged along the slope of the component and connected with the raft foundation to form a complete foundation reinforcement mesh, and accurate reinforcement data for this part is obtained.

[0075] ④ The final step is to draw the hole model of the outer expansion part of the secondary sedimentation tank raft foundation. This step is also a core value point of this patent. Current BIM software can draw the hole model on the front surface of slabs, raft foundations, and wall components. However, after years of upgrades and development, this BIM software has not yet developed the function of drawing the side holes of the raft foundation. Through the reconstruction and analysis of the original modeling method, an effective modeling method for the side holes of the raft foundation has been established. First, the outline of the raft foundation extension connecting to the sloping sump in the reinforcement drawing of section 1-1 is edited using a custom line special-shaped interface editor. Its top elevation is set to -5.103 according to the design requirements of the drawing, and it is placed in the corresponding position. Then, according to the specifications of the sludge pipe (D328*8), and based on the dimensions of the raft foundation extension and the spatial position of the pipe hole in the foundation extension, the CAD drawing function in the BIM software is used to draw a 1000mm*750mm, R162.5mm foundation beam extension section with hole on the drawing interface. Then, the above-mentioned foundation beam with hole is edited through the new special-shaped foundation beam interface and drawn according to the relevant position in the secondary sedimentation tank plan. The top elevation of the starting point of the extension is adjusted to -4.1m, and the final elevation is set to -5.103m. The calculation data for the amount of work occupied by the D328*8 hole of the sludge pipe is obtained. Similarly, the calculation data of the raft foundation expansion portion with D530*10 water inlet pipe in the 2-2 section reinforcement drawing is drawn and calculated according to the above method. The modeling method described in this step efficiently and accurately solves the problem that the volume of the hole on the side of the raft foundation cannot be deducted.

[0076] As can be seen from the above description, this embodiment decomposes the main structural form of the secondary sedimentation tank and divides and adjusts the complex and cumbersome steel reinforcement distribution area of ​​the overall inclined raft slab to ensure that the specifications, models, layout range, and dimensions of the steel reinforcement meet the design requirements; the annular sloping water collection pit forms unique inclined surface steel reinforcement through component substitution and custom construction methods; the volume of the hole portion in the raft slab with holes at the water pipe is generated using flexible deduction and other refined adjustment calculation methods, thereby enabling the secondary sedimentation tank raft slab to complete the engineering quantity calculation in the same BIM model, solving the functional shortcomings of existing BIM computer software, and ensuring the integrity of the BIM model and the accuracy of the engineering quantity data.

[0077] By flexibly applying BIM modeling and refined reinforcement adjustment methods, we have solved the problem that current BIM quantity calculation software for civil engineering cannot perform modeling and quantity calculation for irregular foundations of secondary sedimentation tank raft slabs using conventional methods and functions. With the rapid development of my country's economy and the significant improvement of its comprehensive national strength, the government's determination and confidence in constructing municipal and environmental infrastructure projects have been further strengthened. Therefore, the quality and efficiency of engineering cost work must keep pace with this development. We have innovatively combined and flexibly applied existing BIM calculation software functions and modeling methods. Based on the design requirements of the secondary sedimentation tank structural drawings, we decomposed the complex raft slab structure of the secondary sedimentation tank, reconstructed and analyzed the original BIM modeling methods, and built a modeling and quantity calculation method suitable for complex nodes of the secondary sedimentation tank raft slab. This ensures that BIM modeling aligns with actual on-site production, solving the problem that existing BIM quantity calculation software cannot directly draw and calculate complex nodes of the secondary sedimentation tank raft slab foundation using existing functions and methods. It simplifies the tedious work of quantity surveying, greatly improves work efficiency, reduces the workload of budget personnel, provides accurate quantity data for all parties involved in construction projects, truly reduces costs and increases efficiency, and meets huge market demand.

[0078] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0079] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0080] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0081] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

Claims

1. A refined method for calculating the reinforcement of a secondary sedimentation tank raft slab based on BIM technology, characterized by: Includes the following steps: Step 1: Decompose the secondary sedimentation tank structure into three parts: the overall inclined raft slab, the raft slab extension at the water pipe, and the annular sloping water collection pit. Step 2: Draw the preliminary outline of the secondary sedimentation tank components, and divide and combine the raft foundation multiple times to form the layout range of its internal reinforcement, so that the radial reinforcement extends to the edge of the sump and connects with the longitudinal reinforcement of the sump to form a complete raft foundation reinforcement mesh. Step 3: Draw the annular sloping sump and fine-tune the internal reinforcement. Apply the engineering quantity calculation method for the annular sloping sump of the secondary sedimentation tank to calculate the reinforcement data for this part. The specific calculation method for the engineering quantity of the annular sloping sump of the secondary sedimentation tank is as follows: First, using component substitution, create a new irregular-shaped panel and use the irregular shape editor to draw the outline of the annular sloping sump in the cross-sectional reinforcement drawing. After completion, rename it as "sump". Second, continue to edit the internal reinforcement in the cross-sectional shape. The upper reinforcement is the upper reinforcement of the raft foundation, and the lower reinforcement is the lower reinforcement of the raft foundation. The horizontal reinforcement is arranged according to the layout range. Finally, draw and calculate the reinforcement data for this part. Step 4: Draw the hole model of the extended portion of the secondary sedimentation tank raft foundation, and apply the engineering quantity calculation method for the extended portion of the secondary sedimentation tank raft foundation to calculate the concrete data for this part; the specific calculation method for the engineering quantity of the extended portion of the secondary sedimentation tank raft foundation is as follows: First, divide the extended portion of the foundation according to the cross-sectional reinforcement drawing; edit the outline of the extended portion of the raft foundation that connects with the sloping sump in the cross-sectional reinforcement drawing using a custom line interface editor, and arrange its top elevation in the corresponding position according to the design requirements of the drawing; Second, according to the specifications of the sludge pipe and the extended portion of the raft foundation... The dimensions and spatial location of pipe openings in the foundation extension were determined using the CAD drawing function in BIM software. A cross-sectional view of the foundation beam extension with openings was drawn on the drawing interface. Then, the foundation beam with openings was edited using the new irregular foundation beam interface and drawn according to its location on the secondary sedimentation tank plan. The top elevations of the starting and ending points of the extension were adjusted, and the volume of work excluding the space occupied by the sludge pipe openings was calculated. Finally, the geometric volume data of the raft foundation extension with inlet pipes in all cross-sectional reinforcement drawings was drawn and calculated using the above method. Step 5: Calculate the overall engineering quantity data of the secondary sedimentation tank raft.

2. The method for refined quantity calculation of reinforcement in the secondary sedimentation tank raft slab based on BIM technology according to claim 1, characterized in that: The reinforcing bars inside the annular sloping water collection pit of the secondary sedimentation tank are arranged along the slope of the component and connected with the reinforcing bars of the raft foundation to form a complete reinforcing mesh for the raft foundation. The precise reinforcing bar quantity data for this part is obtained based on the three-dimensional model.

3. The method for refined quantity calculation of reinforcement in the secondary sedimentation tank raft slab based on BIM technology according to claim 1, characterized in that: The specific process of drawing the preliminary outline of the secondary sedimentation tank components is as follows: First, draw the circular raft foundation according to the requirements of the bottom plan of the secondary sedimentation tank; Secondly, the circular raft foundation is divided into quarter-circles, and the elevation of each quarter-circle raft foundation is set according to the elevation of the inclined raft. Then, after its elevation is set, according to the bottom plan layout, the position of the annular sloping water collection pit in the raft foundation is divided into sections according to the design dimensions shown in the figure, and the cut-off part is used as the bottom plate of the water collection pit. Finally, adjust the top elevation of the raft slab according to the data shown in the diagram and place it in the designated position.

4. The method for refined quantity calculation of reinforcement in the secondary sedimentation tank raft slab based on BIM technology according to claim 3, characterized in that: Step 2 involves multiple divisions and combinations of the raft foundation, including the following steps: Step a: According to the design requirements of the drawings, the radial reinforcement of the upper part of the raft foundation is arranged in multiple areas. The raft foundation is divided into areas according to the starting point, center, and end point. Step b: Select any one of the quarter-circular raft foundations, and use the multi-slab or single-slab method and the function of arranging radial reinforcement at the center to draw and calculate the upper radial reinforcement in each area in sequence. Use the reinforcement locking function to fix the calculated radial reinforcement. After drawing, merge the raft foundations of the divided areas. Step c: Draw, calculate, and lock the lower radial reinforcement in all areas of the raft foundation according to the method in step b; Step d: Arrange the upper and lower circumferential reinforcement bars, divide the previously merged raft foundation again, and then use the multi-slab arrangement and parallel edge function to perform multi-area arrangement calculations for the upper and lower circumferential reinforcement bars, and lock the reinforcement bars.

5. A refined quantity calculation system for reinforcement of a secondary sedimentation tank raft slab for performing the method according to any one of claims 1 to 4, characterized in that: This includes a module for drawing and calculating the overall inclined raft foundation, a module for drawing and calculating the extended portion of the raft foundation, and a module for drawing and calculating the annular sloping sump. The overall inclined raft foundation drawing and calculation module is used to set the component elevation and draw and calculate the ring reinforcement and radial reinforcement in multiple areas. The raft foundation expansion section drawing and calculation module is used to draw the holes in the expansion section of the raft foundation and calculate the engineering quantity of the section excluding the holes; The module for drawing and calculating the annular sloping sump pit uses irregularly shaped panels to define and draw the outline of the annular sloping sump pit, then edits the built-in reinforcement and performs calculations.

6. The refined quantity calculation system for reinforcement of the secondary sedimentation tank raft slab according to claim 5, characterized in that: The module for drawing and calculating the extended portion of the raft foundation consists of two parts: one part is the drawing and calculation of the outline of the extended portion of the raft foundation that is adjacent to the sloping sump in the cross-sectional reinforcement drawing, and the other part is the drawing and calculation of the extended portion of the raft foundation with the water inlet pipe in the cross-sectional reinforcement drawing.

7. The refined quantity calculation system for reinforcement of the secondary sedimentation tank raft slab according to claim 6, characterized in that: The elevations are all set according to the relative elevations converted from the elevation datum.

8. The refined quantity calculation system for reinforcement of the secondary sedimentation tank raft slab according to claim 7, characterized in that: The elevation datum is -0.029.

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