CN103871101A - Foundation pit and geologic body model seamless integration method based on three-dimensional Boolean operation - Google Patents
Foundation pit and geologic body model seamless integration method based on three-dimensional Boolean operation Download PDFInfo
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- CN103871101A CN103871101A CN201310699293.2A CN201310699293A CN103871101A CN 103871101 A CN103871101 A CN 103871101A CN 201310699293 A CN201310699293 A CN 201310699293A CN 103871101 A CN103871101 A CN 103871101A
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- 238000009412 basement excavation Methods 0.000 claims abstract description 52
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Abstract
The invention discloses a foundation pit and geologic body three-dimensional model topological seamless integration method based on three-dimensional Boolean operation. The method comprises the steps of firstly building a geologic body model and a foundation pit model, dividing interfaces which surround model bodies into a plurality of models which are represented by triangles and consist of a triangular irregular network (TIN); solving intersecting lines of the triangles surrounding the geologic body model and the foundation pit model after the triangles are intersected; decomposing and reconstructing a triangulation network by a triangle self-decomposition algorithm; judging the affiliation relationship of the triangles; adopting the Boolean operation to obtain a geologic body part and a foundation pit body part to complete the seamless integration of the geologic body and the foundation pit body. The foundation pit model and the geologic body model which are obtained by the seamless integration not only can independently display the excavated foundation pit body, but also overcomes the defect that the analysis requirement of the foundation pit model cannot be realized by the traditional excavation method, and efficient and practical value is realized for engineering application.
Description
Technical field
The present invention relates to the crossing domain of geological mapping, Geotechnical Engineering, computer technology, particularly relate to a kind of foundation ditch and model of geological structure body seamless integration method based on three-dimensional Boolean calculation.
Background technology
Excavation of foundation pit is a step important in building operation, also be the important content of Geotechnical Engineering design, but excavation of foundation pit design is complicated and changeable, need to design according to different engineering demands and different topographic and geologic conditions the foundation ditch of difformity, different depth.Along with the raising that people require for engineering level, the urgently a kind of seamless integrated method of excavation of foundation pit based on model of geological structure body, meets to realize the excavation of foundation pit body after excavating and geologic body is carried out to the demand of visual analysis.
Geologic body and the seamless Integrated design of foundation ditch body, the problem of endeavouring to solve is the visual analysis of the rear geologic body of excavation and foundation ditch body, at present, existing excavation of foundation pit algorithm, be mostly many plane cutting geologic body or carry out excavation of foundation pit by methods such as the combination cuttings to stratum Block Model, with several planes and the cutting of bottom body at place, foundation ditch side, being positioned at like this part that foundation ditch surrounds plane is just cut off, the shortcoming that realizes in this way excavation of foundation pit is not set up independently foundation ditch body Model, although it is visual all can roughly to realize base pit engineering, but excavation of foundation pit body is carried out showing separately difficulty relative to visual analysis, can not meet excavation of foundation pit body is further analyzed to demand.Therefore, the present invention is directed to this problem, designed new excavation algorithm, the topology that has completed geologic body and foundation ditch body is seamless integrated, and then has realized excavation of foundation pit body visual analysis and can assist the place evaluation and decision that carries out engineering.
Summary of the invention
The object of the invention is to solve current excavation of foundation pit algorithm can not meet excavation of foundation pit body is further analyzed to demand, a kind of foundation ditch and model of geological structure body seamless integration method based on three-dimensional Boolean calculation is provided, the topology that has completed geologic body and foundation ditch body is seamless integrated, and then has realized excavation of foundation pit body visual analysis and can assist the place evaluation and decision that carries out engineering.
The technical scheme adopting is:
A kind of foundation ditch and model of geological structure body seamless integration method based on three-dimensional Boolean calculation, the method requires to set up an excavation of foundation pit entity according to engineering design, and doing Boolean subtraction calculation with three-dimensional geological model and this excavation entity, geologic model deducts excavation entity part and is designed a model.
Computing comprises the following steps:
(1) foundation of excavation models and stratigraphic model and subdivision
Model plays the GTP model of geologic body, then transforms the boundary representation model that is split into triangle set composition, and meanwhile, planar stretch method, sets up excavation models, and the boundary representation model forming with triangle;
(2) triangle cap
Because foundation ditch body and stratum body represent model representation by triangle border respectively, be exactly to ask friendship problem between triangle set so both ask the essence of friendship, and then be converted into the friendship of asking between triangle and triangle; First obtain intersection point, then forming intersection by intersection point, and record intersection point and the corresponding leg-of-mutton index in stratum of intersection and the leg-of-mutton index of foundation ditch, the level completing between triangle is asked friendship;
(3) triangle selfdecomposition
Travel through successively each stratum triangular form, according to its index value, select intersection point and intersection in it, by the triangle selfdecomposition algorithm of above-mentioned intersection point correction, stratum Triangle-decomposition is become to TIN;
(4) judge each leg-of-mutton attaching relation
Here need stratum triangle set and the set of foundation ditch triangle after decomposing to judge respectively, for stratum triangle set, judge that its triangle is positioned at inside or the outside of foundation ditch body, take out leg-of-mutton center, judge that this leg-of-mutton central point is whether in foundation ditch body, just can judge that this triangle whether in foundation ditch body, can judge fast and accurately by above-mentioned rays method; Equally, for the set of foundation ditch triangle, determination methods and above-mentioned slightly different, first gets each leg-of-mutton center, judges that this central point is whether in the inside of this stratum body;
(5), according to Boolean operator, extract boundary representation model
In order to isolate the ground layer segment excavating out, select part and the foundation ditch body part stratum body in of stratum body in foundation ditch body, they have jointly surrounded the stratum portion boundary excavating out and have represented model; In order to isolate remaining ground layer segment after excavation, can be according to the poor operator of boolean, select stratum body in the external part of foundation ditch and foundation ditch body the part in geologic body, their have surrounded the boundary representation model of remaining geologic body after excavation jointly; This is the Boolean calculation of excavation models and a certain stratigraphic model, from earth's surface down, takes out successively each stratigraphic model, then allows this stratigraphic model carry out Boolean calculation with excavation models successively; Finally, will hand over the result that operator is tried to achieve to put together according to boolean, formed geologic body part remaining after excavation of foundation pit, realized the seamless excavation of foundation ditch.
Solve about excavating the seamless integrated of body and stratum body according to above-mentioned calculation step:
(1) geologic body of setting up and excavation models, after Boolean operations and difference operation, geologic body is left part after being divided into foundation ditch part and excavation of foundation pit, both intersections are the boundary representation model that identical triangle forms, both consistance are geometrically guaranteed, realize seamless excavation, solved about excavating the seamless integrated of body and stratum body;
(2) realizing in the process of the topology reconstruction between triangle, be applied to triangle selfdecomposition algorithm, the solid of triangle and other triangles composition is asked after friendship, by the intersection point obtaining and intersection; Intersection point is divided into an intersection point, limit intersection point, face intersection point.Point intersection point overlaps with triangular apex, without processing; Limit intersection point is positioned in triangle edges, is divided into two triangles; Face intersection point is positioned at triangle inside, and one is divided into three, utilizes gained intersection, revises leg-of-mutton selfdecomposition.
Beneficial effect of the present invention:
1, utilize the present invention, for the three-dimensional modeling of excavation of foundation pit body, and then the topology that realizes foundation ditch body and geologic body seamless integrated and based on excavation of foundation pit body and excavation after geologic body carry out visual analysis, can show intuitively geometric shape, locus, mutual relationship and the property distribution information in soil layer space;
2, utilize the present invention, can carry out Geotechnical Engineering Base Pit Excavation Simulation and design, the inquiry of basement bottom of the building visualization of information and analyze, improved engineering efficiency, engineering is had important practical significance and using value.
Accompanying drawing explanation
Fig. 1 is that foundation ditch body and model of geological structure body carry out Boolean calculation schematic diagram.
Fig. 2 is the seamless integrated flow figure of excavation models and model of geological structure body.
Fig. 3 is basement bottom of the building inquiry mode schematic diagram.
Fig. 4 is geologic body and the excavation models schematic diagram after excavation.
Fig. 5 is the integrated demonstration schematic diagram of buildings and excavation of foundation pit body.
Fig. 6 is foundation ditch side stretch-out view.
Fig. 7 is the cut away view of geologic body after basement bottom of the building excavation.
Embodiment
For the vector target collection division methods of topological relation parallel computation, case is below provided, and the present invention will be described.
The seamless integrated application case of excavation of foundation pit topology based on model of geological structure body
Gold ground International Garden is positioned at north side, Road, Hun Nan, Shenyang City, east side, bright moon street, and landform is more smooth, and part has surflaes to pile up.Ground elevation is between 47.46-50.30 rice.Geomorphic type is the high overbank of Hun River and paleo-streams.Lay altogether 68 borings, depth of exploration is 10.0-30.0 rice.Because the model of geological structure body of setting up according to original borehole data cannot carry each buildings in scope, therefore carried out the buffer zone modeling of boxed area, on this basis, carry out multiple Geotechnical Engineering Computer Aided Design and visual analysis as an example of any a certain fabrication example.
Carry out Boolean calculation by the foundation ditch body of Fig. 1 and model of geological structure body, obtain with the seamless integrated flow of the excavation models shown in Fig. 2 and model of geological structure body:
(1) integrated model under the ground of original boring and structure thereof, as shown in Figure 3.
(2) select basement bottom of the building inquiry mode, can be according to the prompting in dialog box, select cut away view to generate type and excavation of foundation pit type, as shown in Figure 3.
(3) according to the above-mentioned base profile line of choosing buildings, and according to the elevation of foundation ditch bottom, excavation result as shown in Figure 4.
(4) the above-mentioned integrated demonstration of choosing buildings and excavation of foundation pit body, as shown in Figure 5.
(5) generate excavation of foundation pit body side surface stretch-out view, as shown in Figure 6.
(6) geologic body after excavation is dissectd, to excavate as example, as shown in Figure 7 by buildings minimum bounding box.
Claims (1)
1. foundation ditch and the model of geological structure body seamless integration method based on three-dimensional Boolean calculation, it is characterized in that setting up an excavation of foundation pit entity according to engineering design requirement, and do Boolean subtraction calculation with three-dimensional geological model and this excavation entity, geologic model deducts excavation entity part and is designed a model, and also comprises following two features:
(1) geologic body of setting up and excavation models, after Boolean operations and difference operation, geologic body is left part after being divided into foundation ditch part and excavation of foundation pit, both intersections are the boundary representation model that identical triangle forms, both consistance are geometrically guaranteed, realize seamless excavation, solved about excavating the seamless integrated of body and stratum body;
(2) realizing in the process of the topology reconstruction between triangle, be applied to triangle selfdecomposition algorithm, the solid of triangle and other triangles composition is asked after friendship, by the intersection point obtaining and intersection; Intersection point is divided into an intersection point, limit intersection point, face intersection point, and some intersection point overlaps with triangular apex, without processing; Limit intersection point is positioned in triangle edges, is divided into two triangles; Face intersection point is positioned at triangle inside, and one is divided into three, utilizes gained intersection, revises leg-of-mutton selfdecomposition.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105809735A (en) * | 2016-03-11 | 2016-07-27 | 武汉大学 | Topology maintenance method based on three-dimensional geometric body combination |
| CN105957146A (en) * | 2016-04-29 | 2016-09-21 | 铁道第三勘察设计院集团有限公司 | Linear engineering three-dimensional geological modeling method |
| CN106373193A (en) * | 2016-09-22 | 2017-02-01 | 河海大学 | Box covering method-based slope assembly type discrete element model generating method |
| CN106844999A (en) * | 2017-02-13 | 2017-06-13 | 深圳泛华工程集团有限公司 | The volumetric analysis method and system of solid rock in the range of foundation ditch |
| CN111612903A (en) * | 2020-04-29 | 2020-09-01 | 中冶沈勘工程技术有限公司 | Geological data visualization method based on mixed data model |
| CN113593025A (en) * | 2021-07-30 | 2021-11-02 | 中南大学 | Geologic body model updating method, device, equipment and storage medium |
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| CN102054292A (en) * | 2009-10-30 | 2011-05-11 | 吴立新 | TIN coupling-based overground/underground seamless integrated three-dimensional space modeling method |
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| CN102054292A (en) * | 2009-10-30 | 2011-05-11 | 吴立新 | TIN coupling-based overground/underground seamless integrated three-dimensional space modeling method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105809735A (en) * | 2016-03-11 | 2016-07-27 | 武汉大学 | Topology maintenance method based on three-dimensional geometric body combination |
| CN105957146A (en) * | 2016-04-29 | 2016-09-21 | 铁道第三勘察设计院集团有限公司 | Linear engineering three-dimensional geological modeling method |
| CN105957146B (en) * | 2016-04-29 | 2018-11-27 | 中国铁路设计集团有限公司 | Linear engineering three-dimensional geological modeling method |
| CN106373193A (en) * | 2016-09-22 | 2017-02-01 | 河海大学 | Box covering method-based slope assembly type discrete element model generating method |
| CN106373193B (en) * | 2016-09-22 | 2019-03-01 | 河海大学 | A kind of side slope assembled discrete element analysis generation method based on box cladding process |
| CN106844999A (en) * | 2017-02-13 | 2017-06-13 | 深圳泛华工程集团有限公司 | The volumetric analysis method and system of solid rock in the range of foundation ditch |
| CN111612903A (en) * | 2020-04-29 | 2020-09-01 | 中冶沈勘工程技术有限公司 | Geological data visualization method based on mixed data model |
| CN113593025A (en) * | 2021-07-30 | 2021-11-02 | 中南大学 | Geologic body model updating method, device, equipment and storage medium |
| CN113593025B (en) * | 2021-07-30 | 2022-05-17 | 中南大学 | Geologic body model updating method, device, equipment and storage medium |
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Application publication date: 20140618 |