A bim-based pile foundation automatic prediction and optimization method

Abstract

The application is a kind of pile foundation automatic prediction and optimization method based on BIM;It includes establishing a basic data file library with model parameterization as the carrier;Establishing a BIM-based pile length optimization analysis control system Based on BIM, the automatic prediction of pile foundation: 1) data processing module;2) parameterized programming module;3) analysis module;4) model review module: review the pile foundation model according to different pile types, and compare with the design file to ensure that the program running results meet the design requirements. Through visual programming means, the application realizes automatic analysis and calculation of whether the depth of the pile end entering the bearing stratum meets the requirements, improves the work efficiency and reduces the manual input;It improves the effective optimization space of pile foundation, increases the selectability and controllability of pile arrangement scheme, effectively avoids the cost waste caused by too conservative pile length calculation, and provides scientific and effective data support for later engineering settlement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building information modeling, and in particular to a pile foundation automatic prediction and optimization method based on BIM. BACKGROUND

[0002] Pile foundation optimization is an important part of the construction process. From the traditional pile foundation operation, the technician mainly calculates the pile length according to the nearest exploration hole layout map in the geological exploration data. The reference data is relatively conservative, and the accuracy is low. Manual repeated calculation is time-consuming and laborious.

[0003] In the prior art, a pile foundation length optimization method is to combine the geological model and the pile foundation into the same coordinate system, adjust the length of the pile foundation in the model to meet the rock depth and change with the undulation of the bearing layer; a method for three-dimensional analysis of pile foundation bearing layer, application number CN108804780A, is to import any pile drawing into the three-dimensional model after three-dimensional modeling for comparison and optimization; the disclosed technical method mainly relates to the application of BIM three-dimensional modeling technology in pile foundation length optimization. The purpose is to intuitively and quickly confirm the pile foundation related parameters and select the pile foundation construction method to reduce the waste caused by inaccurate pile length estimation. However, in the above technical method for pile foundation optimization, manual comparison and adjustment are performed for single pile or any pile to achieve the purpose of optimizing the pile length. Compared with the traditional method, the accuracy of pile length optimization is improved, but this technical method is only suitable for small sites or projects with a small number of pile foundations. Especially for large projects, it is still time-consuming and laborious. In addition, the patent CN113378257A pile foundation length optimization method involves other interactive software. The data processed by other software needs to be converted before being transmitted to the Revit software, and the converted data model is difficult to edit in Revit. In summary, the pile foundation construction optimization method still has defects. SUMMARY

[0004] The present application provides a pile length automatic operation and large batch pile foundation parameter adjustment optimization method to solve the problems of low manual review efficiency and low data compatibility in the existing pile foundation optimization technology. This method greatly reduces the manual review workload and also considers data homogeneity, which is suitable for design and construction deepening stage under various geological conditions.

[0005] To achieve the above purpose, the present application is implemented as follows:

[0006] A pile foundation automatic prediction and optimization method based on BIM includes

[0007] Step 1, establish a basic data file library with model parameterization as a carrier, including determining the contact relationship between upper and lower geological layers according to geological, topographic and engineering data, establishing a target curved surface spatial information library, and then creating a parameterized pile foundation model;

[0008] Step 2, establish a pile foundation length optimization analysis control system based on BIM, including

[0009] 1) read the spatial coordinate information based on the target curved surface spatial information library, pick up to the curved surface generation module to automatically generate the target curved surface;

[0010] 2) convert the design file into the pile foundation positioning recognition module, read the layer where the pile foundation is located, and convert the pile foundation information into geometric information recognizable by the program: coordinate information, pile diameter information;

[0011] 3) create a pile foundation optimization analysis program module to analyze and optimize the length of the pile foundation;

[0012] 4) select a prefabricated pile foundation family model file to automatically arrange a large number of pile foundation models;

[0013] 5) pile foundation control information data extraction and reverse component assignment;

[0014] Step 3, automatic pile foundation prediction based on BIM:

[0015] 1) data processing module, geological exploration data and design file data processing, forming an effective pile foundation control boundary information database and prefabricated pile foundation file;

[0016] 2) parameterization programming module, parameterization program group writing for geological layered target curved surface, converting the topographic target curved surface into a program recognizable multi-edge curved surface model;

[0017] 3) analysis and operation module: develop pile foundation length control tool program, and place a large number of pile foundation models and extract and add component information according to spatial positioning information;

[0018] 4) model review module: review the pile foundation model according to different pile foundation types, and compare with the design file to ensure that the program running result meets the design requirements.

[0019] The pile foundation automatic prediction and optimization method based on BIM has the following advantages:

[0020] 1. Through visual programming means, it realizes automatic analysis and calculation of whether the depth of the pile foundation end entering the bearing layer meets the requirements, improves work efficiency, and reduces manual input;

[0021] 2. It enhances the effective optimization space of pile foundations, increases the selectivity and controllability of pile configuration schemes, effectively avoids cost waste caused by overly conservative pile length calculations, and provides scientific and effective data support for later project settlement;

[0022] 3. The programmed data extraction and assignment methods facilitate the transmission of construction information and improve the level of refined construction management of projects;

[0023] 4. The design parameters and calculation results are highly correlated. Even if the design conditions change significantly, this system module can quickly complete the analysis and calculation.

[0024] 5. The calculation method is novel, highly accurate, and practical. Attached Figure Description

[0025] Fig. 1 This is a flowchart illustrating the method of the present invention.

[0026] Fig. 2 This is an engineering geological profile for an example.

[0027] Fig. 3 The example uses a gridded terrain surface.

[0028] Fig. 4 This is a comparison before and after the program runs automatically as an example.

[0029] Fig. 5 This is a schematic diagram of data extraction for an example.

[0030] Fig. 6 This is an example of an application analysis. Detailed Implementation

[0031] The present invention will be further illustrated below through specific embodiments.

[0032] like Figs. 1-6 As shown, taking an airport project as an example, the BIM-based automated pile foundation construction control method proposed in this invention is implemented; including...

[0033] Step 1: Establish a basic data file library based on model parameterization. Based on the survey data, determine the contact relationship between the upper and lower geological layers, establish a target surface spatial information library, create a parameterized pile foundation model, and set parameters, including but not limited to: precast pile number, predicted pile length, actual pile length, precast date, pile driving date, total number of pile hammer blows, pile penetration, etc.

[0034] Step 2: Establish a BIM-based pile foundation length optimization analysis and control system, including:

[0035] (1) Call dynamo to read the target surface point file and create the target terrain (Topography) directly from the points.

[0036] (2) Select the lowest point in the target curved surface point file to obtain the Z-axis component Z1 of the lowest point coordinate;

[0037] (2) Mesh the target terrain model to obtain the mesh list of the target terrain model;

[0038] (3) Convert the target terrain mesh to a polygon surface (ToPolySurface);

[0039] (4) Import the pile plane layout, obtain the pile foundation layer outer contour in the pile foundation layer according to the layer name, and sequentially obtain the pile number List0, positioning (X, Y) List1, radius (Radius) information List2, and;

[0040] (5) Input the top elevation Z2 of the pile foundation, and reorganize the points in List1 to form a spatial point coordinate (X, Y, Z) List3;

[0041] (6) Create a straight line List4 with the points in List3 as the starting point, the direction as (0, 0, -1), and the length as Z1;

[0042] (7) Ensure that the straight line intersects with the target terrain surface, and obtain the intersection point List5 and its Z-axis component Z3;

[0043] (8) Input conditions: rock penetration depth L1, reorganize List5 points to obtain new points List6, i.e. List6 (X, Y, Z3+L1);

[0044] (9) Create a straight line with the points in List3 as the starting point and the points in List6 as the ending point, and obtain the straight line length List7, which is the pile length;

[0045] (10) Select the pile foundation structure family type, take the point in List3 as the positioning point, and create a batch of pile foundation models with the top elevation Z2 of the pile foundation as the limiting condition, introduce the List7 data stream, and batch modify the pile length of the pile foundation family instance;

[0046] (11) Introduce the List7 pile length, List2 pile diameter, and List0 pile number data streams to batch modify the pile length, pile diameter, and pile number parameters of the pile foundation family instance;

[0047] (12) Parameter data call: according to the use scene, the same parameter data stream as the component can be called according to the parameter database to assign values to the component parameters and modify the component instance parameters; different operation and analysis conditions can also be set according to needs and the results can be classified and exported to Excel or CAD, including but not limited to: number, elevation, volume, pile arrangement scheme, cross-sectional drawing, etc.;

[0048] Step three: establishing and running the BIM-based automatic pile foundation pre-judgment control system, comprising:

[0049] 1) data processing module, geological exploration data and design file data processing, forming an effective pile foundation control boundary information database and a pile foundation file;

[0050] 2) parameterized programming module, parameterized program group writing is carried out on the geological stratified target surface, and the topographic target surface is converted into a program recognizable multi-edge surface model;

[0051] 3) analysis and operation module: carry out pile foundation length control tool program compilation, and place a large number of pile foundation models and extract and add component information according to spatial positioning information;

[0052] 4) model review module: review the pile foundation model according to different pile foundation types, and compare with the design file to ensure that the program running result meets the design requirement.

[0053] As can be seen from the above embodiments, the present application respectively proposes a basic data file library establishment taking model parameterization as a carrier, a pile foundation length optimization analysis control system based on BIM, and establishes an automatic pile foundation pre-judgment control system based on BIM, so as to solve the problems of low artificial review efficiency and low model data compatibility in the existing pile foundation optimization technology process.

Claims

1. A BIM-based automated prediction and optimization method for pile foundations: characterized by: include Step 1: Establish a basic data file library based on model parameterization, including determining the contact relationship between upper and lower geological layers based on geological, topographical and engineering data, establishing a target surface spatial information library, and then creating a parameterized pile foundation model; Step 2: Establish a BIM-based pile foundation length optimization analysis and control system, including... 1) Based on the target surface spatial information database, read the spatial coordinate information and pick it into the surface generation module to automatically generate the target surface; 2) Transfer the design file to the pile foundation positioning and recognition module, read the layer where the pile foundation is located, and convert the pile foundation information into geometric information that can be recognized in the program: coordinate information and pile diameter information; 3) Create a pile foundation optimization analysis program module to perform pile foundation length analysis and optimization; 4) Select a pre-made pile foundation family model file to automatically arrange a large number of pile foundation models; 5) Extraction of pile foundation control information data and assignment of reverse component values; Step 3: Automated pile foundation prediction based on BIM: 1) Data processing module: Processing geological exploration data and design document data to form an effective database of pile foundation control boundary information and precast pile foundation documents; 2) Parametric programming module: Parametric programming is used to write target surfaces for geological stratification, converting the target surface of the terrain into a polygonal surface model that the program can recognize; 3) Analysis and Calculation Module: Develop a program for controlling the length of pile foundations, and place a large number of pile foundation models and extract and add component information based on spatial positioning information; 4) Model verification module: Verify the pile foundation model according to different pile foundation types and compare it with the design documents to ensure that the program results meet the design requirements.

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