CN116168167A - Construction method and application of three-dimensional space geological sketch of underground cavern group - Google Patents
Construction method and application of three-dimensional space geological sketch of underground cavern group Download PDFInfo
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- CN116168167A CN116168167A CN202211584048.2A CN202211584048A CN116168167A CN 116168167 A CN116168167 A CN 116168167A CN 202211584048 A CN202211584048 A CN 202211584048A CN 116168167 A CN116168167 A CN 116168167A
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Abstract
The invention provides a construction method and application of an underground cavern group three-dimensional space geological sketch, wherein the method comprises the following steps: s1, three-dimensional modeling of an underground cavern group building structure; s2, geological record and digital drawing of the field excavation surface; s3, splicing the planar geological sketch and the spatial array; s4, constructing a three-dimensional space geological sketch of the underground cavern group; the method comprises the steps of respectively carrying out three-dimensional visual geological information display, advanced geological forecast or surrounding rock excavation response prediction analysis and surrounding rock stability analysis on the underground cavern group based on the construction method of the three-dimensional space geological sketch of the underground cavern group. The method can fully reflect the three-dimensional space attribute of the geological information, effectively improve the construction efficiency and precision of the three-dimensional geological information BIM model and the simulation calculation CAE model, form an electronic engineering file, lay a solid foundation for advanced prediction of geology, qualitative analysis of excavation response, stability evaluation of surrounding rock and the like, and provide technical support for engineering design.
Description
Technical Field
The invention belongs to the technical fields of engineering geology and underground engineering, and particularly relates to a construction method and application of an underground cavern group three-dimensional space geological sketch.
Background
In the field of underground engineering, the existing engineering geology catalog stay hand-drawing sketch and two-dimensional CAD digital sketch, such plan drawing based on the idea of the open-pit display drawing is divided into frames and blocks, so that the plan drawing is more and scattered, lacks critical spatial information, cannot intuitively and systematically describe geological conditions comprehensively, and is difficult to carry out association analysis on geological information among caverns, thereby being not suitable for the establishment of a three-dimensional geological information system of a complex underground cavern group and severely restricting the effect of engineering geology analysis.
Disclosure of Invention
The first aim of the invention is to provide a construction method of a three-dimensional space geological sketch of an underground cavern group aiming at the defects existing in the prior art.
For this purpose, the above object of the present invention is achieved by the following technical solutions:
a construction method of an underground cavern group three-dimensional space geological sketch comprises the following steps:
s1, three-dimensional modeling of an underground cavern group building structure;
in view of the fact that large underground engineering comprises a plurality of caverns which are crisscrossed vertically and horizontally, three-dimensional modeling is carried out on a computer CAD platform according to the size and coordinates of a building structure of a cavern group, and a geometric model of the cavern group is built;
s2, geological record and digital drawing of the field excavation surface;
geological catalogues are developed on the engineering site according to the excavation progress, and the geological catalogues comprise sketch elements such as lithology dividing lines, geological structure traces, surrounding rock damage types and ranges of all excavation surfaces;
forming a digitized planar geological sketch based on a computer CAD platform according to the on-site geological catalogue;
s3, splicing the planar geological sketch and the spatial array;
splicing geological sketches of different excavation steps of each cavity, and forming a space array around the cavity group according to unified coordinates after rotation and translation;
s4, constructing a three-dimensional space geological sketch of the underground cavern group;
projecting geological sketch elements to the excavation surface of each cavity by adopting projection operation;
integrating the space sketch elements of each cavity according to a unified coordinate system to construct a highly integrated cavity group three-dimensional space sketch map. For example: according to the actual geodetic coordinates.
The invention can also adopt or combine the following technical proposal when adopting the technical proposal:
as a preferred technical scheme of the invention: in particular, for some circular caverns, for example: and bending the plain map geological sketch to form a curved surface map by using the arc-shaped top arch or the cylindrical well body excavation surface.
It is a further object of the present invention to provide the use of the method for constructing a three-dimensional spatial geological sketch of an underground cavern group as described above.
For this purpose, the above object of the present invention is achieved by the following technical solutions:
the first aspect is that: the application of the method for constructing the three-dimensional space geological sketch of the underground cavern group in the aspect of three-dimensional visual geological information display of the underground cavern group is provided, and the method comprises the following steps: the sketch elements with different geological properties are combined into different layers to form a three-dimensional visual geological information BIM model, and various geological conditions and surrounding rock stability problems are intuitively displayed through the combination of a plurality of layers of spatial sketch elements.
The second aspect is that: the application of the method for constructing the three-dimensional space geological sketch of the underground cavern group in the aspect of geological advanced prediction or surrounding rock excavation response prediction analysis is provided, and the method comprises the following steps: according to lithology demarcation and geologic structure spreading characteristics, the exposure range of the structural surface is estimated in the layered excavation process, and advanced geological forecast and surrounding rock excavation response prediction analysis can be carried out.
The third aspect is that: the application of the method for constructing the three-dimensional space geological sketch of the underground cavern group in the aspect of surrounding rock stability analysis is provided, and the method comprises the following steps: according to the exposed trace of the structural surface in the three-dimensional space geological sketch, a space curved surface such as lithology demarcation, geological structure and the like is accurately constructed by adopting a recessed surface form, so that a numerical calculation CAE model is quickly built, surrounding rock stability analysis is developed, and technical support is provided for excavation supporting design; the CAE model includes a finite element or discrete element numerical computation model.
The invention provides a construction method and application of a three-dimensional space geological sketch map of an underground cavern group, which can integrate two-dimensional plane geological sketch maps of each cavern in a unified coordinate system in a framing and blocking way through technologies such as projection, bending and the like to form the three-dimensional space sketch map of the cavern group, fully reflect three-dimensional space attributes of geological information, intuitively, systematically and comprehensively describe geological conditions, effectively improve construction efficiency and precision of a BIM model and a simulated calculation CAE model of the three-dimensional geological information, form an electronic engineering archive, lay a solid foundation for advanced prediction of geology, qualitative analysis of excavation response, stability evaluation of surrounding rocks and the like, and provide technical support for engineering design.
Drawings
FIG. 1 is a flow chart of a construction and application method of a three-dimensional geological sketch of an underground cavern group;
FIG. 2 is a three-dimensional modeling of an underground cavern group building structure;
FIG. 3 is a geological record and digital drawing of an excavated surface in the field;
FIG. 4 is a method of constructing a three-dimensional sketch;
FIG. 5 is a three-dimensional sketch of a cavern group;
FIG. 6 is a three-dimensional sketch-based geological formation surface establishment;
FIG. 7 is a graph showing stress damage range of a cavity group surrounding rock.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific embodiments.
As shown in fig. 1, the construction method of the three-dimensional space geological sketch of the underground cavern group comprises the following steps:
s1, three-dimensional modeling of an underground cavern group building structure;
large underground works typically include multiple caverns crisscrossed, referring to fig. 2, an example underground cavern group is composed of caverns such as underground powerhouse, main transformer cavern, tail water tail lock chamber, tail water pressure regulating chamber, water drainage hole, bus hole, tail water hole, etc.;
and carrying out three-dimensional modeling on a computer CAD platform according to the building structure size and coordinates of the cavern group, referring to FIG. 2, for example, adopting Rhino software to construct a geometric model of the cavern group.
S2, geological record and digital drawing of the field excavation surface;
geological catalogues are developed on the engineering site according to the excavation progress, and the geological catalogues are shown in fig. 3, and comprise sketch elements such as lithology dividing lines, geological structure traces, surrounding rock damage types and ranges of all excavation surfaces;
according to the on-site geological catalog, a digitized planar geological sketch is formed based on a computer CAD platform.
S3, splicing the planar geological sketch and the spatial array;
and splicing geological sketches of different excavation steps of each cavity, and forming a space array around the cavity group according to uniform coordinates after rotation and translation, as shown in fig. 4.
S4, constructing a three-dimensional space geological sketch of the underground cavern group;
projecting geological sketch elements to the excavation surface of each cavity by adopting projection operation;
aiming at the excavation surface of a plurality of circular arcs or circular caves, as shown in figure 2, the side walls of the gallery-shaped caves top arch and the cylindrical tail transfer chamber need to be bent to form a curved surface diagram after the planar sketch;
the spatial sketch elements of each cavern are integrated according to a unified coordinate system (such as geodetic coordinates), and a highly integrated cavern group three-dimensional spatial sketch is constructed according to fig. 5.
Based on the construction method of the three-dimensional space geological sketch of the underground cavern group, the method can be applied in the following aspects:
1) Merging sketch elements with different geological properties into different layers to form a three-dimensional geological information BIM model, and intuitively displaying various geological conditions and surrounding rock stability problems through the combination of a plurality of layers;
2) According to lithology demarcations and geologic structure spreading characteristics, the exposure range of the structural surface is estimated in the layered excavation process, so that advanced geological forecast and surrounding rock excavation response prediction analysis can be carried out;
3) Accurately constructing curved surfaces such as lithology boundaries, geological structures and the like by adopting a recessed surface shape according to exposed traces of structural surfaces in a three-dimensional space geological sketch, referring to FIG. 6;
based on the geometric model of the underground cavern group and the newly built geological interface (lithology interface, geological structure and the like), FLAC3D, 3DEC and finite element models can be quickly built by Griddle software, and continuous and discontinuous numerical simulation analysis can be efficiently carried out. Referring to fig. 7, the numerically simulated stress concentration zone coincides with the visually displayed high stress failure zone of the surrounding rock in the in-situ geological record, so that the calculation result can provide effective technical support for prediction of the failure range of the surrounding rock and the establishment of corresponding reinforcing support measures.
The above detailed description is intended to illustrate the present invention by way of example only and not to limit the invention to the particular embodiments disclosed, but to limit the invention to the precise embodiments disclosed, and any modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A construction method of an underground cavern group three-dimensional space geological sketch is characterized by comprising the following steps: the method comprises the following steps:
s1, three-dimensional modeling of an underground cavern group building structure;
in view of the fact that large underground engineering comprises a plurality of caverns which are crisscrossed vertically and horizontally, three-dimensional modeling is carried out on a computer CAD platform according to the size and coordinates of a building structure of a cavern group, and a geometric model of the cavern group is built;
s2, geological record and digital drawing of the field excavation surface;
geological catalogues are developed on the engineering site according to the excavation progress, and the geological catalogues comprise sketch elements such as lithology dividing lines, geological structure traces, surrounding rock damage types and ranges of all excavation surfaces;
forming a digitized planar geological sketch based on a computer CAD platform according to the on-site geological catalogue;
s3, splicing the planar geological sketch and the spatial array;
splicing geological sketches of different excavation steps of each cavity, and forming a space array around the cavity group according to unified coordinates after rotation and translation;
s4, constructing a three-dimensional space geological sketch of the underground cavern group;
projecting geological sketch elements to the excavation surface of each cavity by adopting projection operation;
integrating the space sketch elements of each cavity according to a unified coordinate system to construct a highly integrated cavity group three-dimensional space sketch map.
2. The method for constructing the three-dimensional space geological sketch of the underground cavern group, which is characterized by comprising the following steps of: in step S4, in particular, for some circular caverns, the plan geological sketch is bent to form a curved surface map.
3. The application of the construction method of the three-dimensional space geological sketch of the underground cavern group in the aspect of three-dimensional visual geological information display of the underground cavern group according to claim 1 or 2, which is characterized in that: the sketch elements with different geological properties are combined into different layers to form a three-dimensional visual geological information BIM model, and various geological conditions and surrounding rock stability problems are intuitively displayed through the combination of a plurality of layers of spatial sketch elements.
4. The application of the construction method of the three-dimensional space geological sketch of the underground cavern group in the aspect of geological advanced prediction or surrounding rock excavation response prediction analysis according to claim 1 or 2, which is characterized in that: according to lithology demarcation and geologic structure spreading characteristics, the exposure range of the structural surface is estimated in the layered excavation process, and advanced geological forecast and surrounding rock excavation response prediction analysis can be carried out.
5. The application of the construction method of the three-dimensional space geological sketch of the underground cavern group in the aspect of surrounding rock stability analysis according to claim 1 or 2, which is characterized in that: according to the exposed trace of the structural surface in the three-dimensional space geological sketch, a space curved surface such as lithology demarcation, geological structure and the like is accurately constructed by adopting a recessed surface shape, so that a numerical calculation CAE model is quickly built, surrounding rock stability analysis is developed, and technical support is provided for excavation supporting design.
6. The application of the construction method of the three-dimensional space geological sketch of the underground cavern group in the aspect of surrounding rock stability analysis, which is characterized in that: the CAE model includes a finite element or discrete element numerical computation model.
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