A cim-based pile foundation automatic arrangement and space analysis method

Abstract

The application discloses a kind of pile foundation automation arrangement and space analysis method based on CIM, comprising: establishing the three-dimensional geological model of pile foundation engineering, according to the geographic registration information of the pile foundation engineering, the three-dimensional geological model is introduced to CIM platform;Select the design range of the corresponding pile foundation engineering on the plane of the three-dimensional geological model, form boundary surface, and obtain the coordinate information of all pile foundations in the design range of the pile foundation engineering by space topological analysis algorithm;Obtain the stratum parameters of all pile foundations in the design range of the pile foundation engineering by ray collision method;Calculate the pile foundation bearing capacity of all pile foundations in the design range of the pile foundation engineering;The bilinear interpolation algorithm is used to carry out spatial fitting and cloud chart display to the pile foundation bearing capacity.The advantages of the present application are: fast, efficient;Accurate, quality guaranteed;Wide application range;Good visual effect.

Description

Technical Field

[0001] This invention relates to the technical field of pile foundation engineering, and in particular to a CIM-based automated layout and spatial analysis method for pile foundations. Background Technology

[0002] In today's society, with the acceleration of urbanization and the rapid development of the construction industry, pile foundation engineering, as a crucial part of building construction, is facing increasingly complex and ever-changing challenges. Traditional methods for pile foundation layout and calculation often rely on manual experience, resulting in problems such as inaccurate calculations, long cycles, and high costs, which limit the efficiency and quality of the project.

[0003] However, with the continuous emergence and application of emerging technologies such as information technology, artificial intelligence, and big data, intelligent construction of pile foundation engineering is increasingly becoming an important way to solve the above problems. By introducing automatic layout and calculation technology, intelligent, precise, and efficient design and construction of pile foundation engineering can be achieved. Based on advanced algorithms and models, the optimal pile foundation layout scheme can be quickly generated, and the bearing capacity of the regional pile foundation can be calculated, thereby providing auxiliary decision-making information for design and construction and effectively reducing design and construction risks.

[0004] Intelligent design of pile foundation engineering has significant practical implications and broad development prospects. By introducing automated layout and computational analysis technologies, the efficiency, accuracy, and safety of pile foundation engineering design and construction can be improved, driving the construction industry towards digitalization and intelligence. Therefore, a CIM-based automated layout and spatial analysis method for pile foundations is needed to address the aforementioned issues. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a CIM-based automated layout and spatial analysis method for pile foundations. First, a three-dimensional geological model is imported into the CIM platform based on georeferencing information. Then, coordinate information of pile foundation projects within an arbitrary range is obtained using a spatial topology analysis algorithm, and attribute information of the locations of all pile foundation projects is obtained using the ray collision method. Next, based on the obtained pile foundation information, relevant pile foundation parameters are set, and pile foundation calculation and analysis are performed. Finally, spatial fitting technology is used to generate a cloud map, thereby visualizing the bearing capacity of the pile foundation.

[0006] The objective of this invention is achieved through the following technical solutions: A CIM-based automated pile foundation layout and spatial analysis method, characterized in that the method includes: (S1) Establish a three-dimensional geological model of the pile foundation project, and import the three-dimensional geological model into the CIM platform according to the geographic registration information of the pile foundation project; (S2) Select the corresponding design range of the pile foundation project on the plane of the three-dimensional geological model to form a boundary surface, and obtain the coordinate information of all pile foundations within the design range of the pile foundation project through a spatial topology analysis algorithm; (S3) Based on the coordinate information of all pile foundations within the design scope of the pile foundation project obtained in step S2, the stratum parameters of all pile foundations within the design scope of the pile foundation project are obtained by ray collision method; (S4) Calculate the bearing capacity of all piles within the design scope of the pile foundation project using the stratum parameters and design parameters of all piles obtained in step S3. (S5) Based on the pile bearing capacity of all piles within the design scope of the pile foundation project obtained in step S4, the pile bearing capacity is spatially fitted and displayed using a bilinear interpolation algorithm.

[0007] In step S1, the geographic registration information of the pile foundation project includes longitude, latitude, elevation, and rotation angle.

[0008] In step S2, the method for obtaining the coordinate information of all piles within the design scope of the pile foundation project through spatial topology analysis algorithm is as follows: Obtain a boundary feature point within the design scope of the pile foundation project. Based on the position of the boundary feature point, offset the boundary feature point and create a pile section element. Perform topological analysis on the offset position of the boundary feature point and the boundary surface: if an inclusion relationship is generated, it indicates that the boundary feature point was successfully created; otherwise, it indicates that the creation failed, the offset is abandoned, and an offset is performed at a different angle. At the same time, after the first pile section element is created, subsequent pile section elements not only undergo topological analysis with the boundary surface, but also with the pile foundations.

[0009] In step S3, the method for obtaining the soil parameters of all piles within the design scope of the pile foundation project using the ray collision method is as follows: A vertically downward ray is set at each pile foundation to simulate the movement path of the pile foundation. For each ray, an intersection detection algorithm is used to determine whether the ray intersects with the three-dimensional geological model. If they intersect, the stratum parameters of the pile foundation are obtained based on the intersection point. The stratum parameters of the pile foundation include stratum number, stratum name, geotechnical analysis parameters, geotechnical design parameters, geotechnical test parameters, top elevation of the stratum, and bottom elevation of the stratum.

[0010] In step S4, the design parameters of the pile foundation include pile type, pile diameter, and pile length. When the pile foundation is a large-diameter single pile, the calculation method for the bearing capacity of the large-diameter single pile is as follows: Calculate the standard value of bearing capacity of large-diameter monopiles using empirical formulas. for: ; In the formula: The total limiting side resistance, For the total limiting end resistance, The circumference of the pile body , This refers to the size effect coefficients for the side resistance and end resistance of large-diameter piles. This represents the standard value of the ultimate lateral resistance of the i-th soil layer along the pile. The ultimate pile end resistance, Let be the thickness of the i-th soil layer. This is the cross-sectional area of ​​the pile; Characteristic value of vertical bearing capacity of large-diameter monopile for: ; In the formula: For safety factor; Characteristic value of vertical bearing capacity of large-diameter monopile considering pile cap effect for: ; In the formula: The bearing platform effect coefficient is... The characteristic value of the foundation bearing capacity, To calculate the net area of ​​the pile cap bottom corresponding to the foundation pile; Ensure that the bearing capacity of the pile foundation meets the bearing requirements, that is: ; In the formula: For the vertical load of the foundation, For the foundation and the overlying soil, For the number of piles, This is the importance coefficient for pile foundations.

[0011] In step S5, the method for spatial fitting and cloud map display of the pile foundation bearing capacity using the bilinear interpolation algorithm is as follows: Bilinear interpolation calculates one point in the new image using four known points in the original image. Known Q 11 ( x 1, y 1) Q 12 ( x 1, y 2) Q 21 ( x 2, y 1) Q 22 ( x2, y 2), in x Calculate the direction using a second-order linear interpolation to obtain... R 1( x , y 1) R 2( x , y 2) Two temporary points, then at y Direction calculation of first-order linear interpolation yields R ( x , y ); in, , and Calculated separately as follows: ; ; ; We can obtain: .

[0012] The advantages of this invention are: (1) Fast and efficient: Traditional pile foundation layout methods usually require a lot of manual experience and trial and error, which is time-consuming and costly. Automated layout technology can reduce the manpower and time costs of the layout process through rapid calculation and optimization, and at the same time avoid unnecessary material waste, thereby reducing the overall construction cost; (2) Accuracy and quality assurance: If the quality of the three-dimensional geological model is guaranteed, then the results of the pile foundation bearing capacity calculation and analysis are guaranteed; (3) Wide range of applications: The CIM platform contains a lot of data, which can not only draw pile foundation bearing capacity cloud maps, but also be used for other subsequent applications; (4) Good visualization effect: The CIM platform displays the three-dimensional geological model in a three-dimensional form, which facilitates communication among all parties involved in the project. Attached Figure Description

[0013] Figure 1 This is a flowchart illustrating the working principle of the present invention; Figure 2 This is a schematic diagram illustrating the design scope of the pile foundation engineering in this invention; Figure 3 This is a schematic diagram of the pile foundation layout based on the spatial topology analysis algorithm in this invention; Figure 4 This is a schematic diagram illustrating the principle of the bilinear interpolation algorithm in this invention; Figure 5 This is a table showing the calculation of the pile bearing capacity in this invention; Figure 6 This is a cloud diagram showing the bearing capacity of the pile foundation in this invention. Detailed Implementation

[0014] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art: like Figure 1-6 As shown in the figure, the labels represent: The design scope of the pile foundation project includes: 1. Pile foundation; 2. Pile foundation.

[0015] Example: Figure 1-6 As shown, this embodiment relates to a CIM-based automated pile foundation layout and spatial analysis method, which mainly includes: (S1) Establish a three-dimensional geological model (i.e. BIM model) for the pile foundation project, and import the three-dimensional geological model into the CIM platform based on the georegistration information of the pile foundation project.

[0016] Specifically, geographic information is registered based on the project location, and the origin geographic coordinates are set, mainly including longitude, latitude, elevation, and rotation angle. The visual style is set to color, and the level of detail is set according to project requirements. Draco data compression is used, supporting the export of attribute information. Model lines and model points are excluded. Finally, click export. The exported file is compressed and uploaded to the CIM platform. The CIM platform compiles the compressed file, allowing users to view the BIM model and related attribute information on the platform. CIM stands for City Information Modeling, which is an organic integration of a three-dimensional urban spatial model and urban information based on urban information data.

[0017] This step converts the model format and provides the model and data foundation for the implementation of the technology.

[0018] (S2) For example Figure 2 and Figure 3 As shown, the design scope 1 of the corresponding pile foundation project is selected on the plane of the three-dimensional geological model to form a boundary surface, and the coordinate information of all pile foundations 2 within the design scope 1 of the pile foundation project is obtained through spatial topology analysis algorithm.

[0019] Specifically, based on engineering design requirements, the design scope of the corresponding pile foundation project is selected on the plane to form the boundary of the pile foundation. Then, parameters such as pile spacing are input, and the coordinate information of the pile foundation projects within the scope is obtained in batches through spatial topology analysis algorithms. Finally, starting from the selected area feature points, the layout arrangement of the pile foundation is gradually completed. Spatial topology analysis is a method that analyzes the relative positional relationships between topological elements without considering the spatial relationships between spatial entities in terms of measurement and direction. Topological relationships mainly include three basic relationships: topological adjacency, topological association, and topological inclusion, which play an important role in describing the relative spatial positions of two geometric entities in space.

[0020] The method for obtaining the coordinate information of all piles within the design scope of the pile foundation project through spatial topology analysis algorithm is as follows: A boundary feature point within the design scope of the pile foundation project is obtained. Based on the location of this boundary feature point, its position is offset, and a pile section element is created. A topological analysis is performed between the offset position of the boundary feature point and the boundary surface: if an inclusion relationship is generated, the boundary feature point is successfully created; otherwise, the creation fails, the offset is abandoned, and a new offset is performed at a different angle. Simultaneously, after the first pile section element is created, subsequent pile section elements undergo topological analysis not only with the boundary surface but also between piles to prevent overlapping pile layouts. Finally, after the layout is completed, the coordinate information of all pile foundation points in the pile foundation project is obtained.

[0021] The purpose of this step is to obtain the distribution and coordinate information of the pile foundation project within the actual required range.

[0022] (S3) Based on the coordinate information of all piles within the design scope of the pile foundation project obtained in step S2, the stratum parameters of all piles within the design scope of the pile foundation project are obtained by ray collision method.

[0023] The method for obtaining the soil parameters of all piles within the design scope of the pile foundation project using the ray collision method is as follows: A vertically downward ray is set at each pile foundation to simulate the pile's movement path. For each ray, an intersection detection algorithm is used to determine whether the ray intersects with the 3D geological model. If an intersection occurs, the soil parameters of the pile foundation are obtained based on the intersection point. These soil parameters include the soil layer number, soil layer name, geotechnical analysis parameters, geotechnical design parameters, geotechnical test parameters, top elevation, and bottom elevation of the layer. These obtained parameters will serve as the basis for subsequent verification data for pile foundation bearing capacity, etc.

[0024] Specifically, the starting point and direction of the rays are determined; these rays will be used to simulate the path for detecting the properties of pile foundation engineering. A ray is an infinitely long line emanating from a point in a single direction in the three-dimensional world, capable of colliding with the three-dimensional geological model along its trajectory, and can be represented as... , Starting point For direction vector, t For time.

[0025] The purpose of this step is to obtain information such as stratum numbers and geotechnical test parameters within the design area, which will serve as the basis for pile foundation design calculations.

[0026] (S4) For example Figure 5 As shown, the bearing capacity of all piles within the design scope of the pile foundation project is calculated using the stratum parameters and design parameters of all piles obtained in step S3.

[0027] Specifically, the model of pile foundation engineering is simplified based on certain rules, geological and attribute data are directly applied to the model, and information such as pile type, pile diameter, and pile length are input. Finally, standardized formulas are used for calculation and analysis to ensure the safety and practicality of the structure. At the same time, the risks of pile foundation engineering can be analyzed and studied, continuously improving the ability to mitigate risks.

[0028] Taking the calculation of large-diameter monopile as an example, the standard value of the bearing capacity of large-diameter monopile is calculated according to empirical formulas. for: ; In the formula: The total limiting side resistance, For the total limiting end resistance, The circumference of the pile body , This refers to the size effect coefficients for the side resistance and end resistance of large-diameter piles. This represents the standard value of the ultimate lateral resistance of the i-th soil layer along the pile. The ultimate pile end resistance, Let be the thickness of the i-th soil layer. This is the cross-sectional area of ​​the pile; Characteristic value of vertical bearing capacity of large-diameter monopile for: ; In the formula: For safety factor; Characteristic value of vertical bearing capacity of large-diameter monopile considering pile cap effect for: ; In the formula: The bearing platform effect coefficient is... The characteristic value of the foundation bearing capacity, To calculate the net area of ​​the pile cap bottom corresponding to the foundation pile; Ensure that the bearing capacity of the pile foundation meets the bearing requirements, that is: ; In the formula: For the vertical load of the foundation, For the foundation and the overlying soil, For the number of piles, This is the importance coefficient for pile foundations.

[0029] This step is the core calculation step. Based on the soil layer information and input requirements, the pile is subjected to mechanical analysis and calculation, and relevant parameters are output to complete the subsequent visualization of the design effect.

[0030] (S5) For example Figure 6 As shown, based on the pile bearing capacity of all piles within the design scope of the pile foundation project obtained in step S4, since the pile bearing capacity of each pile is a discrete data point, it is difficult to form a continuous cloud map. Therefore, it is necessary to use the stored pile type database and adopt the bilinear interpolation algorithm to realize the spatial fitting of the pile bearing capacity and the display of the cloud map. At the same time, the refined three-dimensional geological model is used as the information carrier, and the cloud map and BIM model are accurately superimposed based on a unified coordinate system.

[0031] Among them, the bilinear interpolation algorithm calculates one point in the new image using four known points in the original image; like Figure 4 As shown, it is known Q 11 ( x 1, y 1) Q 12 ( x 1, y 2) Q 21 ( x 2, y 1) Q 22 ( x 2, y 2), in x Calculate the direction using a second-order linear interpolation to obtain... R 1( x , y 1) R 2( x , y 2) Two temporary points, then at y Direction calculation of first-order linear interpolation yields R ( x ,y ); in, , and Calculated separately as follows: ; ; ; We can obtain: .

[0032] This step visualizes the pile foundation data through a 3D platform and seamlessly integrates it with the 3D geological model in the CIM platform, facilitating communication among all parties involved in the project and providing users with a quick, intuitive, and vivid presentation of cloud map results.

[0033] The beneficial technical effects of this embodiment are as follows: (1) Fast and efficient: Traditional pile foundation layout methods usually require a lot of manual experience and trial and error, which is time-consuming and costly. Automated layout technology can reduce the manpower and time costs of the layout process through rapid calculation and optimization, and at the same time avoid unnecessary material waste, thereby reducing the overall construction cost; (2) Accuracy and quality assurance: If the quality of the three-dimensional geological model is guaranteed, then the results of the pile foundation bearing capacity calculation and analysis are guaranteed; (3) Wide range of applications: The CIM platform contains a lot of data, which can not only draw pile foundation bearing capacity cloud maps, but also be used for other subsequent applications; (4) Good visualization effect: The CIM platform displays the three-dimensional geological model in a three-dimensional form, which facilitates communication among all parties involved in the project.

[0034] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A CIM-based automated layout and spatial analysis method for pile foundations, characterized in that... The method includes: (S1) Establish a three-dimensional geological model of the pile foundation project, and import the three-dimensional geological model into the CIM platform according to the geographic registration information of the pile foundation project; (S2) Select the corresponding design range of the pile foundation project on the plane of the three-dimensional geological model to form a boundary surface, and obtain the coordinate information of all pile foundations within the design range of the pile foundation project through a spatial topology analysis algorithm; The method for obtaining the coordinate information of all piles within the design scope of the pile foundation project using spatial topology analysis algorithm is as follows: Obtain a boundary feature point within the design scope of the pile foundation project. Based on the position of the boundary feature point, offset the boundary feature point and create a pile section element. Perform topological analysis on the offset position of the boundary feature point and the boundary surface: if an inclusion relationship is generated, it indicates that the boundary feature point was successfully created; otherwise, it indicates that the creation failed, the offset is abandoned, and an offset is performed at a different angle. At the same time, after the first pile section element is created, subsequent pile section elements not only undergo topological analysis with the boundary surface, but also with the pile foundations themselves. (S3) Based on the coordinate information of all pile foundations within the design scope of the pile foundation project obtained in step S2, the stratum parameters of all pile foundations within the design scope of the pile foundation project are obtained by ray collision method; The method for obtaining the soil parameters of all piles within the design scope of the pile foundation project using the ray collision method is as follows: A vertically downward ray is set at each pile foundation to simulate the movement path of the pile foundation. For each ray, an intersection detection algorithm is used to determine whether the ray intersects with the three-dimensional geological model. If they intersect, the stratum parameters of the pile foundation are obtained based on the intersection point. The stratum parameters of the pile foundation include stratum number, stratum name, geotechnical analysis parameters, geotechnical design parameters, geotechnical test parameters, top elevation of the stratum, and bottom elevation of the stratum. (S4) Calculate the bearing capacity of all piles within the design scope of the pile foundation project using the stratum parameters and design parameters of all piles obtained in step S3. (S5) Based on the pile bearing capacity of all piles within the design scope of the pile foundation project obtained in step S4, the pile bearing capacity is spatially fitted and displayed using a bilinear interpolation algorithm.

2. The CIM-based automated layout and spatial analysis method for pile foundations as described in claim 1, characterized in that... In step S1, the geographic registration information of the pile foundation project includes longitude, latitude, elevation, and rotation angle.

3. The CIM-based automated pile foundation layout and spatial analysis method as described in claim 1, characterized in that... In step S4, the design parameters of the pile foundation include pile type, pile diameter, and pile length. When the pile foundation is a large-diameter single pile, the calculation method for the bearing capacity of the large-diameter single pile is as follows: Calculate the standard value of bearing capacity of large-diameter monopiles using empirical formulas. for: ； In the formula: The total limiting side resistance, For the total limiting end resistance, The circumference of the pile body , This refers to the size effect coefficients for the side resistance and end resistance of large-diameter piles. This represents the standard value of the ultimate lateral resistance of the i-th soil layer along the pile. The ultimate pile end resistance, Let be the thickness of the i-th soil layer. This is the cross-sectional area of ​​the pile; Characteristic value of vertical bearing capacity of large-diameter monopile for: ； In the formula: For safety factor; Characteristic value of vertical bearing capacity of large-diameter monopile considering pile cap effect for: ； In the formula: The bearing platform effect coefficient is... The characteristic value of the foundation bearing capacity, To calculate the net area of ​​the pile cap bottom corresponding to the foundation pile; Ensure that the bearing capacity of the pile foundation meets the bearing requirements, that is: ； In the formula: For the vertical load of the foundation, For the foundation and the overlying soil, For the number of piles, This is the importance coefficient for pile foundations.

4. The CIM-based automated layout and spatial analysis method for pile foundations as described in claim 1, characterized in that... In step S5, the method for spatial fitting and cloud map display of the pile foundation bearing capacity using the bilinear interpolation algorithm is as follows: Bilinear interpolation calculates one point in the new image using four known points in the original image. Known Q 11 ( x 1, y 1) Q 12 ( x 1, y 2) Q 21 ( x 2, y 1) Q 22 ( x 2, y 2), in x Calculate the direction using a second-order linear interpolation to obtain... R 1( x , y 1) R 2( x , y 2) Two temporary points, then at y Direction calculation of first-order linear interpolation yields R ( x , y ); in, , and Calculated separately as follows: ； ； ； We can obtain: 。

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