Municipal pipeline construction system based on BIM technology

Abstract

The invention discloses a municipal pipeline construction system based on a BIM technology, and relates to the technical field of municipal pipeline construction. The method comprises the following steps: establishing a cubic model of a to-be-constructed area by using a BIM technology, dividing the model into a plurality of grids, constructing a grid map of the to-be-constructed area, and classifying the grids into obstacle grids, passable grids and to-be-planned grids; calculating the volume ratio of the to-be-planned grids according to the size of the obstacle and the size of the to-be-wired pipeline, further classifying the to-be-planned grids, and sequentially defining the collision risk probability of each level of to-be-planned grids; pipeline wiring is carried out by taking a barrier-free grid as a constraint condition of a wiring strategy, and a pipeline line which can be implemented is obtained; according to the defined collision risk probability, the construction risk value of the pipeline line which can be implemented is calculated, the obtained construction risk value is used for sequentially classifying the construction risk levels of the pipeline line, and the pipeline line and the construction strategy are determined according to the division result of the construction risk levels.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal pipeline construction, and in particular to a municipal pipeline construction system based on BIM technology. Background Art

[0002] With the rapid development of my country's economy and the accelerating urbanization process, the importance of municipal infrastructure construction, especially municipal pipeline network construction, has become increasingly prominent. As an important supporting facility for urban municipal roads, the municipal pipeline network covers a variety of pipelines such as water supply, rainwater, sewage, electricity, telecommunications, gas, and heat. These pipelines are staggered in the underground space of the city, forming a complex pipeline network system.

[0003] During the pipeline construction process, the layout of small pipelines distributed in intricate and narrow spaces has many complex constraints due to their small size, large number of turns, many forks, small spatial spans, and narrow layout space.

[0004] Generally, in the prior art, the grid method is usually used for wiring map modeling. In the traditional grid map modeling process, the part of the grid map that is not full is usually regarded as an obstacle or a passable area. Although this solution reduces the complexity of wiring, it will increase the probability of wiring space redundancy, thereby compressing the space available for subsequent pipeline arrangement, which may cause the path planning to fall into an unsolvable state; in addition, it will increase the risk of misjudgment in the wiring process, thereby increasing the possibility of collision in pipeline layout. Therefore, in order to solve the above possible problems, we propose a municipal pipeline construction system based on BIM technology. Summary of the invention

[0005] The main purpose of the present invention is to provide a municipal pipeline construction system based on BIM technology, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A municipal pipeline construction system based on BIM technology, the construction process of the system includes the following steps: Step 1: Use BIM technology to build a cubic model of the area to be constructed, divide the model into a number of λ×λ×λ grids, construct a grid map of the area to be constructed, add a three-dimensional model of obstacles to the grid map, and classify the grids into obstacle grids, passable grids, and grids to be planned; Step 2: Obtain the size of all obstacles in the grid to be planned and the size of the pipeline to be routed, and calculate the The volume ratio of the grid to be planned , the grids to be planned are further classified using the volume ratio, and the collision risk probabilities of various grids to be planned are defined in turn as , , , and 0< < < <1; Step 3: Determine the starting point coordinates and the ending point coordinates of the pipeline to be routed in the grid map, and route the pipeline using the constraint of not passing through the obstacle grid as the routing strategy to obtain the pipeline route that can be implemented. , Expressed as pipelines that can be implemented, where is a non-negative integer; Step 4: Calculate the collision risk probability according to the definition The construction risk value of the pipeline route that can be implemented , the obtained construction risk value is used to classify the construction risk level of the pipeline line into levels Ⅰ, Ⅱ, Ⅲ, and Ⅳ in descending order, and the pipeline line and construction strategy are determined according to the results of the construction risk level classification.

[0007] In step 1, the classification principle of the grid is: The grids in the grid map that are not fully occupied by obstacles are classified as grids to be planned; The grids in the grid map that are not occupied by obstacles are classified as passable grids; The grids in the grid map that are fully occupied by obstacles are classified as obstacle grids.

[0008] In step 2, the volume ratio The calculation formula is:

[0009] In the formula, Expressed as The volume value of obstacles in the grid to be planned; Indicated as after The pipe radius value of the grid to be planned; For the Pipeline routing correction factor for the grid to be planned; is the ratio of pi; λ is the length of the grid side.

[0010] In step 2, the grids to be planned are further classified according to the following principles: When 0< ≤1, The grids to be planned are classified as high collision risk area grids; When 1< ≤3, the The grids to be planned are classified as medium collision risk area grids; when >3 o'clock, The grids to be planned are classified as low collision risk area grids.

[0011] No. Pipeline routing correction factor for the grids to be planned The calculation formula is:

[0012] In the formula, Expressed as The spatial complexity of the grids to be planned; and ; Expressed as The first of the grids to be planned The volume value of each obstacle; Expressed as The number of obstacles in the grid to be planned; Expressed as The type complexity of the grid to be planned; Expressed as The distribution complexity of the grids to be planned; Expressed as The weight of the spatial complexity of the grid to be planned; Expressed as The weight of the complexity of the grid type to be planned; Expressed as The weight of the complexity of the grid distribution to be planned; and + + =1; , , ∈(0,1); is a natural constant.

[0013] In step 4, The construction risk value of the pipeline routes that can be implemented The calculation formula is: In the formula, Expressed as The number of high collision risk area grids that the pipeline route that can be implemented passes through; Expressed as The number of medium collision risk area grids that the pipeline route that can be implemented passes through; Expressed as The number of low collision risk area grids through which the pipeline route can be implemented.

[0014] In step 4, the principles for grading construction risks are as follows: When 0.6< When ≤1, the construction risk level of the pipeline is Level I; When 0.5< When ≤0.6, the construction risk level of the pipeline is Level II; When 0.1< When ≤0.5, the construction risk level of the pipeline is Level III; when When ≤0.1, the construction risk level of the pipeline is IV. The complexity of the types of grids to be planned It is determined according to the following formula, specifically: = ,in, For the The types of obstacles in the grid to be planned; No. The distribution complexity of the grids to be planned Determined according to the assignment method, specifically: = (1,2), where When the obstacles in the grid to be planned are regularly distributed, =1; when When the obstacles in the grid to be planned are irregularly distributed, =2.

[0015] The system comprises: A grid map construction module is used to establish a cubic model of the area to be constructed by using BIM technology, divide the model into a plurality of λ×λ×λ grids, construct a grid map of the area to be constructed, and add a three-dimensional model of obstacles to the grid map; A first grid classification module is used to classify the grids into three categories: obstacle grids, passable grids and grids to be planned; The data acquisition module is used to obtain the size of all obstacles in the grid to be planned and the size of the pipeline to be routed, and calculate the first The volume ratio of the grid to be planned ; A second grid classification module is used to further classify the grid to be planned into a high collision risk area grid, a medium collision risk area grid, and a low collision risk area grid by using the volume ratio; The risk definition module is used to define the collision risk probability of each level of the grid to be planned in turn: , , , and 0< < < <1; The pipeline route acquisition module is used to determine the starting point coordinates of the pipeline to be routed in the grid map. and the end point coordinates The pipeline routing is performed with the constraint of not passing through the obstacle grid as the routing strategy, and the pipeline route that can be implemented is obtained. , Expressed as pipelines that can be implemented, where is a non-negative integer; The construction risk calculation module is used to calculate the first The construction risk value of the pipeline route that can be implemented , the obtained construction risk value is used to classify the construction risk level of the pipeline line into levels Ⅰ, Ⅱ, Ⅲ, and Ⅳ in descending order, and the pipeline line and construction strategy are determined according to the results of the construction risk level classification.

[0016] The system also includes a memory, a processor, and a computer program stored on the memory and executable on the processor.

[0017] The present invention has the following beneficial effects: Compared with the prior art, the technical solution of the present invention uses BIM technology to establish a cubic model of the area to be constructed, divides the model into several λ×λ×λ grids, constructs a grid map of the area to be constructed, adds a three-dimensional model of obstacles to the grid map, classifies the grids into three categories: obstacle grids, passable grids and grids to be planned, obtains the sizes of obstacles and the sizes of pipelines to be wired in all the grids to be planned, and calculates the first The volume ratio of the grid to be planned , the grid to be planned is further classified into a high collision risk area grid, a medium collision risk area grid, and a low collision risk area grid by using the volume ratio, and the collision risk probability of each level of the grid to be planned is defined in turn as , , , determine the starting point coordinates of the pipeline to be routed in the grid map and the end point coordinates , perform pipeline routing with not passing through the obstacle grid as a constraint condition of the routing strategy, obtain the implementable pipeline route, and calculate the first The construction risk value of the pipeline route that can be implemented The obtained construction risk value is used to classify the construction risk level of the pipeline line into levels Ⅰ, Ⅱ, Ⅲ, and Ⅳ in descending order, and the pipeline line and construction strategy are determined according to the classification results of the construction risk level. This can effectively solve the problem of increased probability of wiring space redundancy and increased risk of misjudgment in the wiring process caused by the existing technology that regards the less than full grid in the grid map as an obstacle or a passable area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a construction process of a municipal pipeline construction system based on BIM technology according to the present invention; Figure 2 This is a structural schematic diagram of a municipal pipeline construction system based on BIM technology in the present invention; Figure 3 A schematic diagram of a grid map of the area to be constructed in the technical solution of the present invention; Figure 4 Schematic diagram of the classification of obstacle grilles, passable grilles and grilles to be planned. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific implementation methods, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and should not be understood as limiting the present invention. In order to better illustrate the specific implementation methods of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0020] The specific implementation process of the technical solution of the present invention includes the following steps: Step 1: Use BIM technology to build a cubic model of the area to be constructed, divide the model into several λ×λ×λ grids, and construct a grid map of the area to be constructed, such as Figure 3 As shown, a three-dimensional model of obstacles is added to the grid map; The specific process includes: 1) Establish a cube model of the area to be constructed Use BIM modeling software, such as Revit, ArchiCAD, etc., to create a 3D model of the area to be constructed. The model should include all relevant elements such as building structure, equipment, pipelines, etc.

[0021] 2) Define the construction area Define the boundaries of the area to be constructed according to the construction plan. You can use the area demarcation tool in the software to draw the boundaries of the construction section.

[0022] 3) Divide the model into a cubic grid Determine the grid size: The grid side length is determined based on the construction needs and accuracy requirements. The grid size should be small enough to capture the details within the construction area.

[0023] Generate a raster: Use the modeling function of BIM software to divide the area to be constructed into a λ×λ×λ cubic grid. This can be achieved by the following methods: Manual division: In BIM software, manually create grid boundaries to divide the model into multiple cubes; Automated tools: Use automated modeling tools such as Dynamo to generate grids through scripts.

[0024] 4) Build a grid map Extracting raster information Extract the geometric and semantic information of each grid from the BIM model.

[0025] Rasterization Map the extracted raster information into a 2D or 3D map to form a grid map. You can use the export function of the BIM software to export the raster information into a format supported by GIS or other mapping tools.

[0026] 5) Optimize the grid map: Hole filling processing: For possible holes in the model, a triangular mesh hole filling algorithm is used to process them to ensure the integrity of the grid; Optimize segmentation: For components that cross grids, use Boolean operations to perform segmentation to ensure that the model information in each grid is complete.

[0027] Step 2: Classify the grilles into three categories: obstacle grilles, passable grilles, and grilles to be planned; the classification principles are: The grids in the grid map that are not fully occupied by obstacles are classified as grids to be planned; The grids in the grid map that are not occupied by obstacles are classified as passable grids; The grids in the grid map that are fully occupied by obstacles are classified as obstacle grids; the classification results are as follows: Figure 4 shown.

[0028] Through the above steps, all grids in the grid map can be classified, which is convenient for the subsequent use of the path search algorithm to search for pipeline wiring routes. For the passable grid, it is the grid that can be wired, and for the obstacle grid, it is the grid that cannot be wired. Whether the grid to be planned can be wired needs to be analyzed according to the subsequent steps.

[0029] Step 3: Obtain the size of all obstacles in the grid to be planned and the size of the pipes to be routed, and calculate the first The volume ratio of the grid to be planned Volume ratio The calculation formula is:

[0030] In the formula, Expressed as The volume value of obstacles in the grid to be planned; Indicated as after The pipe radius value of the grid to be planned; For the Pipeline routing correction factor for the grid to be planned; is the circumference of a circle; λ is the length of the grid side. Pipeline wiring correction factor The calculation formula is:

[0031] In the formula, Expressed as The spatial complexity of the grids to be planned; and ; Expressed as The first of the grids to be planned The volume value of each obstacle; Expressed as The number of obstacles in the grid to be planned; Expressed as The type complexity of the grid to be planned; Expressed as The distribution complexity of the grids to be planned; Expressed as The weight of the spatial complexity of the grid to be planned; Expressed as The weight of the complexity of the grid type to be planned; Expressed as The weight of the complexity of the grid distribution to be planned; and + + =1; , , ∈(0,1); is a natural constant; The complexity of the types of grids to be planned It is determined according to the following formula, specifically: = ,in, For the The types of obstacles in the grid to be planned; The distribution complexity of the grids to be planned Determined according to the assignment method, specifically: = (1,2), where When the obstacles in the grid to be planned are regularly distributed, =1; when When the obstacles in the grid to be planned are irregularly distributed, =2.

[0032] Through the above steps, the volume ratios of all grids to be planned in the grid map can be obtained, and then the space occupancy of the grids to be planned can be understood.

[0033] Specifically, the method for obtaining the volume value of the obstacle is: Take Revit software as an example After the grid map is established and the three-dimensional model of the obstacle is added to the grid map, the volume of the obstacle in the model can be extracted through the secondary development API of Revit. Specifically: 1) Get obstacle elements First, you need to obtain the obstacle elements in the model through the Revit API. Assuming that the obstacle elements have specific categories or parameters, you can filter these elements through the FilteredElementCollector.

[0034] 2) Calculate the volume of obstacles The volume of an obstacle can be calculated based on its geometric shape. If the obstacle is based on a family instance (such as furniture, equipment, etc.), you can use the GeometryElement class to obtain its geometric shape and then calculate the volume; for some irregular obstacles, the volume can be calculated by decomposing the obstacle into multiple simple geometric bodies (such as cubes, cylinders, etc.), then calculating the volume of each simple geometric body separately, and finally adding them together, and then converting the units to ensure that the volume unit is consistent with the project requirements.

[0035] Take ArchiCAD software as an example After the grid map is established and the three-dimensional model of the obstacle is added to the grid map, it can be realized by writing scripts or using plug-ins. Although ArchiCAD does not have an API like Revit, similar functions can be realized through its built-in scripting language (such as GDL) or third-party plug-ins. If the geometric shape of the obstacle is very complex, it can be similar to the operation of Revit software, decomposing the obstacle into multiple simple geometric bodies, calculating the volume separately and then adding them, and then converting the units to ensure that the volume unit is consistent with the project requirements.

[0036] Step 4: Use the volume ratio to further classify the grids to be planned into grids in high collision risk areas, grids in medium collision risk areas, and grids in low collision risk areas. The classification principles are: When 0< ≤1, The grids to be planned are classified as high collision risk area grids; When 1< ≤3, the The grids to be planned are classified as medium collision risk area grids; when >3 o'clock, The grids to be planned are classified as low collision risk area grids.

[0037] Through the above steps, the grids to be planned can be classified. For the grids in the high collision risk area, they are grids that can be wired, but the risk of collision is relatively high; for the grids in the medium collision risk area, they are grids that can be wired, and the risk of collision is moderate; for the grids in the low collision risk area, they are grids that can be wired, and the risk of collision is relatively low.

[0038] Step 5: Define the collision risk probability of each level of grid to be planned as , , , and 0< < < <1.

[0039] Through the above steps, the collision risk probability of the planned grid can be artificially defined and set according to the actual construction situation, providing a certain amount of operational space for construction wiring.

[0040] Step 6: Determine the starting point coordinates of the pipeline to be routed in the grid map and the end point coordinates , use the constraint condition of not passing through the obstacle grid as the routing strategy to perform pipeline routing and obtain the feasible pipeline route , Expressed as pipelines that can be implemented, where is a non-negative integer; =0, it means that there is no pipeline route that can be implemented. Specifically, it can be implemented by following the steps below: 1) Determine the coordinates of the starting point and the ending point by the following method Method 1: Extract the coordinates of the pipeline endpoints: In the BIM model, software tools are used to obtain the starting and ending point coordinates of the pipeline, using Revit as an example. The Element.Location property can be used to obtain the centerline endpoint coordinates of the pipeline.

[0041] For example, in Revit, you can get the start and end point coordinates of the pipeline through the LocationCurve.Curve.EndPoint property.

[0042] Method 2: Manually specify coordinates: In some cases, you can also manually select the start and end points. In the BIM software, click the start and end points, and the software will automatically display the coordinate parameters.

[0043] 2) Build a grid map Dividing the grid Divide the area to be constructed into a 3D grid of λ×λ×λ. This can be achieved using BIM software such as Revit, or automation tools such as Dynamo; Marking Obstacle Grilles In the grid map, mark the grids that contain obstacles. Obstacles can be identified by the collision detection tool and the grids where they are located are marked as unusable.

[0044] 3) Pipeline routing algorithm The specific process includes: Initialization input: starting point coordinates and the end point coordinates , initialize the path list and add the starting point to the path.

[0045] Path search algorithm: Use a path search algorithm, such as the A* algorithm or the Dijkstra algorithm, to find a path from the starting point to the end point in the grid map, avoiding obstacle grids. The basic steps of the algorithm are as follows: Define the heuristic function: For the A* algorithm, define the heuristic function h(n) as the Euclidean distance from the current grid to the end point; Priority queue: Use the priority queue to store the grids to be explored, sorted by the heuristic function value; Explore the neighborhood: explore the adjacent grids from the current grid, skipping the obstacle grids and the visited grids; Update the path: add the reachable neighborhood grid to the path and update the priority queue; Termination condition: Stop when the termination point is reached or the priority queue is empty.

[0046] Path Optimization: Smooth path: Smooth the searched path to reduce unnecessary turning points; Check connectivity: Make sure each grille on the path can be connected by pipes.

[0047] Output Generate routing path: Output the final path as a pipeline routing plan, including the coordinates of each grid on the path; Visualization: Visualize the wiring path in the BIM model to facilitate construction personnel to understand and operate.

[0048] Step 7: Calculate the collision risk probability according to the definition. The construction risk value of the pipeline routes that can be implemented ; Construction risk value The calculation formula is: ;

[0049] In the formula, Expressed as The number of high collision risk area grids that the pipeline route that can be implemented passes through; Expressed as The number of medium collision risk area grids that the pipeline route that can be implemented passes through; Expressed as The number of low collision risk area grids through which the pipeline route can be implemented.

[0050] Step 8: Use the obtained construction risk value to classify the construction risk level of the pipeline line into levels I, II, III, and IV in descending order. The construction risk level classification principle is: When 0.6< When ≤1, the construction risk level of the pipeline is Level I; When 0.5< When ≤0.6, the construction risk level of the pipeline is Level II; When 0.1< When ≤0.5, the construction risk level of the pipeline is Level III; when When ≤0.1, the construction risk level of the pipeline line is Level IV.

[0051] Step 7: Determine the pipeline route and construction strategy based on the construction risk level classification results. For example, when the construction risk level of the pipeline route is Level I, it indicates that during the actual construction process, the pipeline to be constructed is prone to collision with existing pipelines or obstacles. At this time, rewiring or taking other pipeline routes can be considered.

[0052] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A municipal pipeline construction system based on BIM technology, characterized in that: The construction process of the system includes the following steps: Step 1: Use BIM technology to build a cubic model of the area to be constructed, divide the model into a number of λ×λ×λ grids, construct a grid map of the area to be constructed, add a three-dimensional model of obstacles to the grid map, and classify the grids into obstacle grids, passable grids, and grids to be planned; Step 2: Obtain the size of all obstacles in the grid to be planned and the size of the pipeline to be routed, and calculate the The volume ratio of the grid to be planned , the grids to be planned are further classified using the volume ratio, and the collision risk probabilities of various grids to be planned are defined in turn as , , , and 0< < < <1; Step 3: Determine the starting point coordinates and the ending point coordinates of the pipeline to be routed in the grid map, and route the pipeline using the constraint of not passing through the obstacle grid as the routing strategy to obtain the pipeline route that can be implemented. , Expressed as pipelines that can be implemented, where is a non-negative integer; Step 4: Calculate the collision risk probability according to the definition The construction risk value of the pipeline route that can be implemented , the obtained construction risk value is used to classify the construction risk level of the pipeline line into levels Ⅰ, Ⅱ, Ⅲ, and Ⅳ in descending order, and the pipeline line and construction strategy are determined according to the results of the construction risk level classification.

2. According to the municipal pipeline construction system based on BIM technology according to claim 1, it is characterized in that: In step 1, the classification principle of the grid is: The grids in the grid map that are not fully occupied by obstacles are classified as grids to be planned; The grids in the grid map that are not occupied by obstacles are classified as passable grids; The grids in the grid map that are fully occupied by obstacles are classified as obstacle grids.

3. According to the municipal pipeline construction system based on BIM technology in claim 1, it is characterized in that: In step 2, the volume ratio The calculation formula is: ; In the formula, Expressed as The volume value of obstacles in the grid to be planned; Indicated as after The pipe radius value of the grid to be planned; For the Pipeline routing correction factor for the grid to be planned; is the ratio of pi; λ is the length of the grid side.

4. According to the municipal pipeline construction system based on BIM technology in claim 1, it is characterized in that: In step 2, the grids to be planned are further classified into three categories: high collision risk area grids, medium collision risk area grids, and low collision risk area grids, wherein the collision risk probabilities are , , ; The specific classification principles are: When 0< ≤1, The grids to be planned are classified as high collision risk area grids; When 1< ≤3, the The grids to be planned are classified as medium collision risk area grids; when >3 o'clock, The grids to be planned are classified as low collision risk area grids.

5. According to the BIM technology-based municipal pipeline construction system of claim 3, it is characterized in that: No. Pipeline routing correction factor for the grids to be planned The calculation formula is: ; In the formula, Expressed as The spatial complexity of the grids to be planned; and ; Expressed as The first of the grids to be planned The volume value of each obstacle; Expressed as The number of obstacles in the grid to be planned; Expressed as The type complexity of the grid to be planned; Expressed as The distribution complexity of the grids to be planned; Expressed as The weight of the spatial complexity of the grid to be planned; Expressed as The weight of the complexity of the grid type to be planned; Expressed as The weight of the complexity of the grid distribution to be planned; and + + =1; , , ∈(0,1); is a natural constant.

6. The municipal pipeline construction system based on BIM technology according to claim 1 is characterized in that: In step 4, The construction risk value of the pipeline routes that can be implemented The calculation formula is: ; In the formula, Expressed as The collision risk probability in the pipeline routes that can be implemented is The number of grilles; Expressed as The collision risk probability in the pipeline routes that can be implemented is The number of grilles; Expressed as The collision risk probability in the pipeline routes that can be implemented is The number of grilles.

7. The municipal pipeline construction system based on BIM technology according to claim 1 is characterized in that: In step 4, the principles for grading construction risks are as follows: When 0.6< When ≤1, the construction risk level of the pipeline is Level I; When 0.5< When ≤0.6, the construction risk level of the pipeline is Level II; When 0.1< When ≤0.5, the construction risk level of the pipeline is Level III; when When ≤0.1, the construction risk level of the pipeline line is Level IV.

8. The municipal pipeline construction system based on BIM technology according to claim 5 is characterized in that: No. The complexity of the types of grids to be planned It is determined according to the following formula, specifically: = ,in, For the The types of obstacles in the grid to be planned; No. The distribution complexity of the grids to be planned Determined according to the assignment method, specifically: = (1,2), where When the obstacles in the grid to be planned are regularly distributed, =1; when the obstacles in the grid to be planned are irregularly distributed, take =2.

9. A municipal pipeline construction system based on BIM technology, characterized in that: The system is used to implement the steps of the construction process described in claim 1, including: A grid map construction module is used to establish a cubic model of the area to be constructed by using BIM technology, divide the model into a number of λ×λ×λ grids, construct a grid map of the area to be constructed, and add a three-dimensional model of obstacles to the grid map; A first grid classification module is used to classify the grids into three categories: obstacle grids, passable grids and grids to be planned; The data acquisition module is used to obtain the size of all obstacles in the grid to be planned and the size of the pipeline to be routed, and calculate the first The volume ratio of the grid to be planned ; A second grid classification module is used to further classify the grid to be planned into a high collision risk area grid, a medium collision risk area grid, and a low collision risk area grid by using the volume ratio; The risk definition module is used to define the collision risk probability of each level of the grid to be planned in turn: , , , and 0< < < <1; The pipeline route acquisition module is used to determine the starting point coordinates of the pipeline to be routed in the grid map. and the end point coordinates The pipeline routing is performed with the constraint of not passing through the obstacle grid as the routing strategy, and the pipeline route that can be implemented is obtained. , Expressed as pipelines that can be implemented, where is a non-negative integer; The construction risk calculation module is used to calculate the first The construction risk value of the pipeline route that can be implemented , the obtained construction risk value is used to classify the construction risk level of the pipeline line into levels Ⅰ, Ⅱ, Ⅲ, and Ⅳ in descending order, and the pipeline line and construction strategy are determined according to the results of the construction risk level classification.

10. A municipal pipeline construction system based on BIM technology, characterized in that: The system also includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the construction process described in claim 1 can be implemented when the processor executes the program.

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