CN110189409B - PLAXIS-based rapid true three-dimensional geological modeling method and system - Google Patents
PLAXIS-based rapid true three-dimensional geological modeling method and system Download PDFInfo
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Abstract
The invention provides a PLAXIS-based rapid true three-dimensional geological modeling method and a system, comprising the following steps: respectively importing the topographic contour line and the geophysical prospecting section line into an AutoCAD, processing in the AutoCAD, and storing the processed file in a dxf format; importing the stored dxf format file into SKUA-GOCAD software, performing line turning point processing, and exporting point data in the dxf format; importing the point data into Surfer for interpolation, importing the complete point data obtained after interpolation into SKUA-GOCAD fitting to generate a ground surface and a sliding surface, and exporting a format file supported by Rhino; importing a format file supported by the rho into the rho to generate a NURBS curved surface, and exporting the NURBS curved surface in a dxf format; and establishing a network or entity model according to the exported file in the dxf format.
Description
Technical Field
The invention relates to the field of geological engineering, in particular to a PLAXIS-based rapid true three-dimensional geological modeling method and system.
Background
With the development of urban geology, BIM technology is widely applied in geotechnical engineering, and establishment of a true three-dimensional geological model which accords with engineering practice plays a vital role in the development of engineering construction digitization and intellectualization. The three-dimensional geological modeling software at home and abroad is numerous, such as FLAC3D, ABAQUS, ANSYS and the like, but PLAXIS is favored by the majority of engineering personnel due to the advantages of friendly program interface, convenient operation, powerful calculation function, reliable result and the like. At present, three-dimensional geologic models built by PLAXIS are mostly false three-dimensional models, and because of higher difficulty in building true three-dimensional models and poorer operability, the PLAXIS is less used for building the true three-dimensional geologic models in engineering. However, the false three-dimensional model can not truly reflect the actual geological condition to a great extent, so that the establishment of the true three-dimensional geological model is necessary for engineering construction.
Disclosure of Invention
The invention aims to solve the technical problems of high difficulty in establishing a true three-dimensional model and poor operability in the current engineering, and provides a rapid true three-dimensional geological modeling method and system based on PLAXIS.
A rapid true three-dimensional geologic modeling method based on PLAXIS, comprising:
step one, respectively importing a topographic contour line and a geophysical prospecting section line into an AutoCAD, processing the topographic contour line and the geophysical prospecting section line in the AutoCAD, and storing the processed file in a dxf format;
step two, importing the stored dxf format file into SKUA-GOCAD software, performing line turning point processing, and exporting point data in the dxf format;
step three, importing the point data into a Surfer for interpolation, importing the complete point data obtained after interpolation into SKUA-GOCAD fitting to generate a ground surface and a sliding surface, and exporting a format file supported by Rhino;
step four, importing a format file supported by the rho into the rho to generate a NURBS curved surface, and exporting the NURBS curved surface in a dxf format;
and fifthly, establishing a network or entity model according to the dxf format file derived in the step four.
Further, the processing method in the AutoCAD in the first step specifically includes: and (3) carrying out integrated analysis on the topographic contour lines, the geophysical prospecting section lines and the previous data, opening a CAD graph of the topographic contour lines in a 3D view mode according to actual conditions, and then guiding sliding lines in the geophysical prospecting section lines into the topographic contour lines.
Further, the interpolation method in the third step adopts a kriging interpolation method.
Further, the method for generating the NURBS curved surface in the fourth step specifically includes: and (3) inputting a map command box cloth selection curtain in the rho according to the imported ground surface and the sliding grid surface to generate the NURBS curved surface.
Further, the method for establishing the network or the entity model in the fifth step specifically includes: stretching and Intersect and recluster operations are performed to obtain a network or solid model based on the landslide boundary and landslide range.
A rapid true three-dimensional geologic modeling system based on PLAXIS, comprising: a processor and a storage device; the processor loads and executes the instructions and data in the storage device for implementing any one of the PLAXIS-based rapid true three-dimensional geologic modeling methods.
Compared with the prior art, the invention has the advantages that: the invention uses the combination of multiple software, fully utilizes the existing data and rapidly establishes the true three-dimensional geological model which is attached to the actual geological condition. The operation steps of each software are simple, the modeling time of a beginner is greatly saved, and the method plays a good role in guiding and borrowing engineering management and analysis.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of a method for rapid true three-dimensional geologic modeling based on PLAXIS according to the present invention;
FIG. 2 is an AutoCAD three-dimensional view downhill model of the present invention;
FIG. 3 is a model of the data after SKUA-GOCAD processing according to the present invention;
FIG. 4 is a view showing the ground surface and sliding surface generated after SKUA-GOCAD processing according to the present invention;
FIG. 5 is a graph of the ground and sliding surfaces generated after the Rhino process of the present invention;
FIG. 6 is a three-dimensional geological model of a salix psammophila landslide in accordance with the present invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
In the embodiment of the invention, taking the Marshall landslide in Wanzhou area as an example, as shown in fig. 1, the Marshall landslide geological information is processed based on AutoCAD, SKUA-GOCAD, surfer and Rhino software, then the processed data is imported into PLAXIS, stretching and Boolean operation are carried out, and finally a reliable true three-dimensional geological model is built.
A rapid true three-dimensional geologic modeling method based on PLAXIS, comprising:
step one, processing a line file, as shown in fig. 2:
(1) Opening a Masallin topographic map in CAD, deleting unnecessary layers and elements, and finally only reserving five layers of 0 layers, contour lines, geophysical prospecting section lines, landslide boundaries and modeling ranges (the 0 layers cannot be deleted, other layers are named English, otherwise, problems appear when the map is subsequently imported into SKUA-GOCAD for display).
(2) And checking whether the elevation properties of the two end points of the geophysical prospecting section line are correct, and correcting if the elevation properties are incorrect.
(3) And inputting a COPY command, copying the same geophysical prospecting section line in situ, and then according to the elevation properties of two end points of a second line of the lowest point height Cheng Xiugai in the geophysical prospecting section.
(4) And (5) creating a coordinate system according to the two geophysical prospecting section lines.
(5) Adjusting the transverse-longitudinal proportion of the geophysical prospecting section to be 1:1000, then, redundant elements are deleted, and only the sliding surface and one line segment drawn according to the lowest point are reserved.
(6) And inputting a 3D view command, adjusting the topographic map to a proper angle, copying the sliding surface reserved by the geophysical prospecting section and the base point of the lowest point line section, and pasting the sliding surface and the base point of the lowest point line section to the corresponding position of the topographic map.
(7) The processed file is saved in dxf format, named' mll. ( And (3) injection: the file name and path cannot be presented with Chinese, otherwise cannot be identified and read by SKUA-GOCAD )
Step two, generating point data, as shown in fig. 3:
(1) SKUA-GOCAD was turned on, measured depth units units were set as meters, depth axis positive values directions were chosen as upwards.
(2) By file-import-public data-dxf operation, open' mll.
(3) The menu bar commands selects points, executes new-from pointset curve or surface, selects a graph layer which is intended to be converted into a point set in points (or curve, surface) points, names the points in a name bar, and clicks ok after completion to realize conversion from a line file to a point file. The same operation is performed on the other line file layers to be converted into the point set.
Step three, generating a face file, as shown in fig. 4:
(1) And executing file-export-point set-export properties to excel, selecting the exported point set from objects, selecting three-dimensional coordinates of x, y and z from properties, and clicking ok after completion to export the point set file to excel in the form of three-dimensional coordinates.
(2) And selecting all three-dimensional coordinate points in excel, opening a buffer, creating a working table, and copying the coordinate points into the working table.
(3) Files are saved, file type selection golden software dat (· dat), and named for it.
(4) Closing the worksheet, executing the grid-data, selecting the just saved file and opening. And (3) automatically selecting a gridding method, namely an interpolation mode, setting grid intervals or row numbers according to requirements, clicking for confirmation after finishing setting, and generating a file with a suffix of a grd format.
(5) Executing file-open, selecting the just saved file and open. Files are saved, files are executed-saved as commands, the file type is selected as ASCII XYZ (x. Dat), named and saved.
(6) And opening SKUA-GOCAD, executing file-import-horizon interpretations-X Y Z, and opening the point file after the buffer interpolation.
(7) Selecting a surface in menu fields, executing new-pointset medium plane, selecting a point set of intent generation curved surface in points (or curve, surface) points, naming the point set in name field, and clicking ok after completion.
(8) Executing tools-split-all, and performing triangle unit division on the medium value surface; executing constraints-control points, and selecting constraint points; performing constraints-constrains on borders-all borders to perform grid boundary constraint; executing interaction-on entire surface, clicking apply to fit the median plane, and simultaneously, continuously refining triangle units of the median plane to enable the median plane to pass through a three-dimensional point set to the greatest extent, fitting the three-dimensional point set to the optimal curved surface, and generating a ground surface and a sliding surface.
Step four, establishing NURBS curved surfaces, as shown in FIG. 5:
(1) And (3) importing the file into the Rhino, inputting a draft command, selecting a cloth curtain in a Top view according to the requirement to generate a NURBS curved surface, deleting the imported grid surface, and only reserving the NURBS curved surface, a landslide boundary and a modeling range.
(2) The export file is in dxf format.
Step five, establishing a network/entity model, as shown in fig. 6:
(1) The file is imported into PLAXIS, and a surface slightly smaller than the ground surface and the sliding surface is created under the Top view according to the modeling range.
(2) And stretching the created surface according to the requirement to generate a cuboid, simultaneously selecting the cuboid, the ground surface and the sliding surface, clicking a right mouse button, and selecting Intersect and recluster from the popped options.
(3) And creating a surface according to the landslide boundary, stretching the surface to generate a body with the upper bottom surface in the shape of the landslide boundary, selecting the body and a body formed by cutting the ground surface and the sliding surface, and performing Intersect and recluster operation again.
(4) And finally deleting unnecessary surfaces to obtain the model.
The present invention establishes each stratum based on contour lines, geophysical cross section lines and conventional drilling data, and then introduces the stratum into PLAXIS to form a surface body.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (4)
1. A rapid true three-dimensional geologic modeling method based on PLAXIS, comprising:
step one, respectively importing a topographic contour line and a geophysical prospecting section line into an AutoCAD, processing the topographic contour line and the geophysical prospecting section line in the AutoCAD, and storing the processed file in a dxf format;
step two, importing the stored dxf format file into SKUA-GOCAD software, performing line turning point processing, and exporting point data in the dxf format;
step three, importing the point data into a Surfer for interpolation, importing the complete point data obtained after interpolation into SKUA-GOCAD fitting to generate a ground surface and a sliding surface, and exporting a format file supported by Rhino;
step four, importing a format file supported by the rho into the rho to generate a NURBS curved surface, and exporting the NURBS curved surface in a dxf format;
step five, establishing a network or entity model according to the dxf format file derived in the step four;
the method for generating the NURBS curved surface in the fourth step specifically comprises the following steps: according to the imported ground surface and the sliding grid surface, inputting a map command frame in the Rhino to select a cloth curtain to generate a NURBS curved surface;
(1) Importing the file into the Rhino, inputting a draft command, selecting a cloth curtain in a Top view according to the requirement to generate a NURBS curved surface, deleting the imported grid surface, and only reserving the NURBS curved surface, a landslide boundary and a modeling range;
(2) The exported file is in dxf format;
the method for establishing the network or entity model in the fifth step specifically comprises the following steps: stretching and Intersect and recluster operations are performed to obtain a network or solid model based on the landslide boundary and landslide range.
2. The rapid true three-dimensional geologic modeling method based on PLAXIS according to claim 1, wherein the processing method in AutoCAD in step one specifically comprises: and (3) carrying out integrated analysis on the topographic contour lines, the geophysical prospecting section lines and the previous data, opening a CAD graph of the topographic contour lines in a 3D view mode according to actual conditions, and then guiding sliding lines in the geophysical prospecting section lines into the topographic contour lines.
3. The rapid true three-dimensional geologic modeling method of claim 1, wherein the interpolation in step three uses kriging interpolation.
4. A rapid true three-dimensional geologic modeling system based on PLAXIS, comprising: a processor and a storage device; the processor loads and executes the instructions and data in the storage device for implementing a rapid true three-dimensional geologic modeling method based on PLAXIS as claimed in any one of claims 1 to 3.
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| CN110704916B (en) * | 2019-09-24 | 2023-06-16 | 中水北方勘测设计研究有限责任公司 | BIM technology-based large complex three-dimensional geological model grid coarsening method |
| CN110648399A (en) * | 2019-09-24 | 2020-01-03 | 国电联合动力技术有限公司 | Wind power plant terrain entity modeling method and device based on Surfer software |
| CN110675498B (en) * | 2019-09-30 | 2023-02-21 | 石家庄铁道大学 | Long and large strip-shaped three-dimensional geological environment modeling method and device and terminal equipment |
| CN112163257A (en) * | 2020-09-23 | 2021-01-01 | 淮北矿业股份有限公司 | Method for quickly outputting grid-type time section lines of working surface |
| CN113027529B (en) * | 2021-03-22 | 2022-03-01 | 中国矿业大学 | Stope impact risk assessment method based on numerical inversion |
| CN113223116B (en) * | 2021-05-17 | 2023-10-13 | 重庆大学 | Sliding slope geological model based on AutoCAD, construction method and evaluation method |
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