CN108280293A - Two side-wall pilot tunnel tunnel excavation dividing elements method based on BIM technology - Google Patents

Two side-wall pilot tunnel tunnel excavation dividing elements method based on BIM technology Download PDF

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CN108280293A
CN108280293A CN201810062148.6A CN201810062148A CN108280293A CN 108280293 A CN108280293 A CN 108280293A CN 201810062148 A CN201810062148 A CN 201810062148A CN 108280293 A CN108280293 A CN 108280293A
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tunnel
model
excavation
section
vhprolen
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CN108280293B (en
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赵宇
汪波
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SIMUTECH INC.
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CHENGDU SIMU TECHNOLOGY Co Ltd
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    • G06F30/10—Geometric CAD
    • G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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Abstract

The present invention proposes a kind of two side-wall pilot tunnel tunnel excavation dividing elements method based on BIM technology, includes the following steps：S1 the characteristics of construction according to model layers, obtains hierarchical mode；S2, according to these hierarchical mode construction characteristics or parameter, attribute configuration and expansion are carried out to these hierarchical modes, the BIM models of hierarchical mode construction is obtained and its attribute constructs to these framing models and carries out attribute configuration and expansion, obtain the BIM models and its attribute of framing model construction.

Description

Two side-wall pilot tunnel tunnel excavation dividing elements method based on BIM technology
Technical field
The present invention relates to computer program application field more particularly to a kind of two side-wall pilot tunnel tunnels based on BIM technology Excavate dividing elements method in road.
Background technology
It, can by acquisition, the arrangement to engineering project items relevant information data in architecture information manages BIM technology Overall management is carried out to engineering project, in BIM engineerings, existing constructing tunnel model be all by from designing a model or It carries out dividing several units by hand and carries out construction organization again, such construction organization is coarse；Current construction model is straight It connects and defers to the progress that designs a model, construction information does not dock effectively with designing a model；And carry out Excavation simulation in tunnel In the process, quick excavation scheme cannot be effectively formed.This just solves corresponding technical problem there is an urgent need for those skilled in the art.
Invention content
The present invention is directed at least solve the technical problems existing in the prior art, especially innovatively proposes one kind and be based on The two side-wall pilot tunnel tunnel excavation dividing elements method of BIM technology.
In order to realize the above-mentioned purpose of the present invention, the present invention provides a kind of two side-wall pilot tunnel tunnel based on BIM technology Road excavates dividing elements method, includes the following steps：
S1 is designed importing to tunnel model, configured tunneling technique parameter attribute, the characteristics of according to tunnel excavation engineering method, builds The vertical constraints for excavating section, generates and excavates cross section profile, and excavation face is generated according to tunnel center line, then with engineering design Results model carries out Boolean calculation, obtains and excavates results model；
S2, split cells is generated according to these hierarchical modes, and cell attribute configuration and expansion are carried out to these hierarchical modes, Obtain the BIM models of excavation model construction.
The two side-wall pilot tunnel tunnel excavation dividing elements method based on BIM technology, it is preferred that the S1 packets It includes：
S1-1 calculates the normal vector vSecNormal in section according to the tunnel section of selection；
S1-2 calculates projection of this on tunnel center line according to any point A on tunnel center line and tunnel section A1, to obtain tunnel center line A1 points normal plane and tangential direction；The tangent line of normal vector and A1 points in conjunction with section Direction vector, the cosine value by calculating its angle determine whether the tangential direction vector of A1 is reversed with expection, finally calculates Normal vector vProNormal of the tunnel center line in A1 normal planes；
S1-3 calculates H direction vectors, then ask with the tangential direction of A1, it is specified that with tunnel benchmark excavation line direction for the directions H Tunnel excavation the directions V, calculation formula V=vProNormal*H, i.e. vector V be perspective plane normal vector vProNormal and The multiplication cross of direction vector H；
S1-4 obtains the minimum of object model section in construction work data and surrounds according to the tunnel cross section profile of selection Box L and bounding box long axis maximum point MaxP and smallest point MinP；
S1-5 calculates kernel of section point minPos according to bounding box the long axis MaxP and MinP acquired in conjunction with perspective plane.
The two side-wall pilot tunnel tunnel excavation dividing elements method based on BIM technology, it is preferred that the S2 packets It includes：
S2-1 carries out attribute configuration to each excavation result entity, including：Color, transparency, construction type, personnel, when Between carry out assignment；
S2-2 calculates separately out the width and height in tunnel section, calculation formula according to the directions H and V and bounding box long axis length For：
Projection vector of the bounding box long axis in the directions H：
VHProLen=((((MaxP-MinP) %H)/(H.x*H.x+H.y*H.y+H.z*H.z)) * H)；
Tunnel cross-sectional width：
HLen=sqrt (vHProLen.x*vHProLen.x+vHProLen.y*vHProLen.y+vHProLen.z* vHProLen.z)；
Wherein H is the direction vector that S1-3 is acquired, and H.x/H.y/H.z is respectively the x/y/z coordinates of vector H, VHProLen.x/vHProLen.y/vHProLen.z is respectively the x/y/z coordinates of vector v HProLen, and sqrt is extraction of square root；
S2-3 combines according to the cross section parameter of input, calculates tunnel section outline excavation；By way of sweeping along Tunnel center line by tunnel section outline excavation sweeping at excavation face, then by excavation face with excavate body according to first left and right sides base tunnel after Upper and lower sequence carries out Boolean calculation, obtains and excavates results model.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
Unit in charge of construction's high-precision easy to use is converted to disclosure address how designing a model of obtaining from designing institute to apply Work model that is, by industry set rule or constraints, and is managed BIM attribute informations, and automatic divide is convenient for The construction organization unit of implementation realizes the BIM auto-building models of Project Construction Organization, improves the essence of construction management of project Degree and accuracy, by two side-wall pilot tunnel tunnel excavation dividing elements method of this method based on BIM technology, raising project is held Line efficiency.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment Obviously and it is readily appreciated that, wherein：
Fig. 1 is work flow diagram of the present invention；
Fig. 2 is schematic diagram of the embodiment of the present invention；
Fig. 3 is that the present invention divides embodiment schematic diagram；
Fig. 4 is that the rectangular tunnel of the present invention divides embodiment schematic diagram；
Fig. 5 is that diamond shape tunnel of the present invention divides embodiment schematic diagram；
Fig. 6 is general illustration of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated dress It sets or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as the limit to the present invention System.
Wherein BIM (Building Information Modeling) technologies model for architecture information.
Wherein when tunneling data model imported into BIM systems, need to execute following steps：
I, engineering design model is directly read, and translation resolution is carried out to its model data institutional framework；According to construction work Journey construction requirements form design and construction engineering master data information, according to construction requirements, read and import different-format design result Model；According to the mode of different designs tool design results model, translation resolution design result model data institutional framework Product Structure；According to construction characteristic and positioning, each different modelling tool design result moulds are directly read Type, independent of different modelling tools.
II, according to model data institutional framework feature, classify to each model data institutional framework, according to point Class obtains the data of each of which classification, wherein comprising the graph data in model institutional framework, the attribute in model institutional framework Data；It is required according to construction work model data institutional framework, according to the model data institutional framework after I translation resolution Product Structure features classify to each model data institutional framework, and classification form is assembly Product, Part Part, body Body；It is required according to construction work model data institutional framework, to sorted model data institutional framework, Its attribute data and graph data are obtained respectively；The requirement of construction work model data institutional framework：Assemble the child node of Product Can only be assembly Product and part Part nodes, the child node of part Part can only be body Body, wherein assembling Product and part Part nodes only represent construction work model tree institutional framework, and body Body represents the construction work mould A geometry data under type data；
III, it is woven according to the model data institutional framework got, and the new model data institutional framework of needs, group The model institutional framework of new needs；
IV, according to the model data institutional framework got, and got after classifying to model data institutional framework Corresponding model attributes data and model graph data, according to being loaded directly into and quickly loading both of which, respectively to model geometric Topological Skew Field carries out respective handling；
According to construction work model data institutional framework require, and to design result model data institutional framework classify after The correspondence model attributes data and model graph data obtained respectively, for construction work model data import two ways, It is loaded directly into and quickly loads, handle respectively；
It is required according to construction work model data, the mode of being loaded directly into requires the geometry entity number of designing load results model According to, the geometry entity data of design result model are made of model geometric model and constructive geometry construction two parts, Wherein model geometric refers to the class that topological class is directed toward, and does not include specific shape information, constructive geometry refers in model geometric Statement, including actual shape information；Model geometric is also known as the topological structure of model, and constructive geometry is also known as solution to model and releases knot Structure, the geometry entity expression of a square, 1：Wherein model geometric topology refers to how many block in this square geometry (square only there are one block), how many face (there are six faces for square) in block, on face how many boundary edge (12 boundaries Side), how how many point (eight points) in boundary edge connects, 2 between point and side：Wherein constructive geometry refers to, specific face, face Upper specific side (being made of which point), specific side, specific point coordinates, constructive geometry is that specific explanations model geometric is opened up It flutters.The difference of model geometric model in model entity data and constructive geometry construction with the former does not include tool The shape data information of body, and the latter includes actual shape data information.
It is required according to construction work model data, is loaded directly into design result model data and needs to carry out precision and Model Space Between control, the precision and the model space of designing load results model data control formula are as follows：
Set A:Bare minimum (10e-6)
B:Minimum value of standardizing (10e-10)
C:The approximation accuracy (10e-3) of curve and surface
D:It is considered as zero maximum value (10e-11)
Model space computational algorithm：
Model space=A/B=10e-6/10e-10=10e4；
It is required according to construction work model data, quick load mode requires the figure number of quick designing load results model According to the graph data of design result model refers to that, not comprising the pure graph data for having topology, pictorial data representaton method is as follows：
Set point：P1, P2, P3, P4, P5, P6
Wherein P1=P4, P3=P6,
Point list：PList=P1x, P1y, P1z, P2x, P2y, P2z, P3x, P3y, P3z, P4x, P4y, P4z, P5x, P5y, P5z, P6x, P6y, P6z }
Face table data collection：FList={ Pn1, P1, P2, P3, Pn2, P5, P4, P6 }
Face Face=PList+FList
Pn：Point quantity
Original discrete graphics data, expression figure be Fig. 3：
The figure is a rectangle, becomes two triangles after discrete, abides by the right-hand rule, and normal direction is all outside, optimization Process is：
Point duplicate removal：PList={ P1x, P1y, P1z, P2x, P2y, P2z, P3x, P3y, P3z, P5x, P5y, P5z },
Face duplicate removal data set：FList={ Pn1, P1, P2, P3, Pn2, P5, P1, P3 }
Reduce dough sheet quantity：Such as two quadrangles constitute a big quadrangle, are four triangle griddings before optimization, it is excellent It is two triangle griddings after change, triangle gridding is that computer hardware rendering is needed data, and triangle gridding quantity is lower, can carry Rise rendering efficiency.
The engineering design model introduction method based on BIM technology, it is preferred that the S5 includes：
It is required according to construction work model data, the graph data and attribute for having been subjected to processing that will be got in S4 Data are tied to respectively in the corresponding node of the construction work model data institutional framework recombinated in S3.
V, according to being loaded directly into and quickly loading both of which, add respectively into each classification of model data institutional framework The model graphical information that adds that treated.
As illustrated in fig. 1 and 2, the present invention provides a kind of, and the two side-wall pilot tunnel tunnel excavation unit based on BIM technology is drawn Divide method, includes the following steps：
S1 is designed importing, configured tunneling technique parameter attribute to tunnel model, and the demand according to user to tunneling obtains Corresponding parameters for tunnel is taken, is preconditioned according to the characteristics of tunnel excavation engineering method, the constraints for excavating section is established, it is raw At tunnel model profile is split, the fractionation cross section profile of excavation is scanned, excavation face is generated according to tunnel center line, then Boolean calculation is carried out with engineering design results model, obtains the result of the fractionation tunnel model of excavation；
S2, split cells is generated according to these hierarchical modes, and cell attribute configuration and expansion are carried out to these hierarchical modes, Obtain the BIM models of excavation model construction.
Preferably, the S1 includes：
S1-1 calculates the normal vector vSecNormal in section according to the tunnel section of selection；
S1-2 calculates projection of this on tunnel center line according to any point A on tunnel center line and tunnel section A1, to obtain tunnel center line A1 points normal plane and tangential direction；The tangent line of normal vector and A1 points in conjunction with section Direction vector, the cosine value by calculating its angle determine whether the tangential direction vector of A1 is reversed with expection, finally calculates Normal vector vProNormal of the tunnel center line in A1 normal planes；
S1-3 calculates H direction vectors, it is specified that split by the directions horizontal axis H of tunnel benchmark excavation line direction, then with A1 Tangential direction acquire the directions longitudinal axis V of tunnel excavation and split, calculation formula V=vProNormal*H, i.e. vector V are The multiplication cross of perspective plane normal vector vProNormal and direction vector H；
S1-4 obtains the minimum of object model section in construction work data and surrounds according to the tunnel cross section profile of selection Box L and bounding box long axis maximum point MaxP and bounding box long axis smallest point MinP；
S1-5, according to the bounding box long axis maximum point MaxP and bounding box long axis smallest point MinP acquired, in conjunction with projection Face calculates kernel of section point minPos.
As shown in Figure 3, it is preferred that the S2 includes：
S2-1 carries out attribute configuration to each excavation result entity, including：Color, transparency, construction type, personnel, when Between carry out assignment；
S2-2 calculates separately out the width and height in tunnel section, calculation formula according to the directions H and V and bounding box long axis length For：
Projection vector of the bounding box long axis in the directions horizontal axis H：
VHProLen=((((MaxP-MinP) %H)/(H.x*H.x+H.y*H.y+H.z*H.z)) * H)；
Tunnel cross-sectional width：
HLen=sqrt (vHProLen.x*vHProLen.x+vHProLen.y*vHProLen.y+vHProLen.z* vHProLen.z)；
Wherein H is the direction vector that S1-3 is acquired, and H.x/H.y/H.z is respectively the x/y/z coordinates of vector H, VHProLen.x/vHProLen.y/vHProLen.z is respectively the x/y/z coordinates of vector v HProLen, and sqrt is extraction of square root； According to fig. 3, from the point of view of the specific embodiment of Fig. 4 and Fig. 5 is analyzed, vertical data H is acquired first, then acquires lateral data W, Acquisition hence for data can be carried out orderly, make project data more rich in conditioning, certainly, according to the specific of engineering construction It needs, can also be played very for other actual conditions using lateral data W, the method for then acquiring vertical data H is first acquired Good technique effect, is adjusted flexibly in practical operation according to demand data.
As shown in fig. 6, in architecture information manages BIM technology, particularly with the data model construction of constructing tunnel engineering Certification is mutually distinguishable for construction work data and machine in order to realize in the process, hence for needing for tunneling data mould Type carries out the import operation of model, is handled to imported among BIM systems, tunnel model is actually applied according to different Work condition carries out the fractionation and planning of model, the programming project for different tunnel models is formed, to improve constructing tunnel work After finishing tunnel model division, by the automatic hooking method of PBS structures, construction is carried out to tunneling data model for journey efficiency Plan as a whole to arrange with data name, construction and data name are planned as a whole to the tunneling data model after arranging and carry out export operation, it is above-mentioned Description presents working links of the PBS in whole BIM, and the tunnel model in construction is divided, and there is important guidance to anticipate Justice.
S2-3 combines according to the cross section parameter of input, calculates tunnel section outline excavation；By way of sweeping along Tunnel center line by tunnel section outline excavation sweeping at excavation face, then by excavation face with excavate body according to first left and right sides base tunnel after Upper and lower sequence carries out Boolean calculation, obtains and excavates results model.
As shown in figure 3, the step of using S2-3 for conventional tunnel shape carries out constructing operation, tunneling data mould is drawn Type；
After tunneling data model is divided, is mounted, be as follows automatically by PBS：
1. reading in PBS data；According to PBS codings, the data row of PBS descriptions, PBS classification, to PBS data in Excel It carries out tissue and reads in system；The PBS data of importing include column heading, and wherein PBS codings are prerequisite data row；If leading Enter PBS data other than PBS codings, description, classification, includes also the information such as attribute or quantities, correspondence need to be added to PBS after；Without any requirement for the sequence of data row tissue, random order data row tissue is all supported to import and identify； It supports single PBS to import, also PBS quantities is supported to import simultaneously.
2. mapping data row；The PBS data of importing are arranged the data of PBS codings, PBS descriptions, PBS classification, Carry out one-to-one mapping；
3. structured coding samples of the typing PBS per level-one；PBS encodes sample and supports：Engineering project, construction unit, branch 6 engineering, subdivisional work, element project, construction cell ranks；
Arbitrary rank number is carried out for PBS codings to import,
Actual coding rank 1=engineering projects+construction unit；
Actual coding rank 2=engineering projects+construction unit+partitioned project；
Actual coding rank 3=engineering projects+construction unit+partitioned project+subdivisional work；
Actual coding rank 4=engineering projects+construction unit+partitioned project+subdivisional work+element project；
Actual coding rank 5=engineering projects+construction unit+partitioned project+subdivisional work+element project+construction cell；
Wherein engineering project does not insert coding sample, to generate an interim root node, in preview function, to the root Node is automatically corrected, and sets engineering project to root node.
4. being mounted automatically；Automatically each level structure is calculated, organizes sub- father node relationship automatically；
Specified data row are extracted from PBS data pools, are put into valid data pond；
Six engineering project, construction unit, partitioned project, subdivisional work, element project, construction cell ranks are obtained successively Sample encodes；According to coding sample parsing coding placeholder, algorithm is：
If being encoded to Cur_Code before PBS coding broomrapes, PBS coding row are next to be encoded to Next_Code；
So traversal PBS codings row, if Cur_Code_Len！Then placeholder ReplaceChar is=Next_Code_Len Null character string, at this moment the digit in PBS codings per level encoder is all different, and wherein Cur_Code_Len is previous volume Code character string length, Next_Code_Len are the latter code character string length；
It is equipotential PBS codings if Cur_Code_Len==Next_Code_Len, at this moment PBS encodes each rank Number of encoding bits are the same, for the insufficient digit of each rank, use some specific placeholder for supplement, such as 0；It is right at this time Each character of PBS codings is traversed：If：It is Cur_Code_C, Next_ in the character of the same position J, Cur_Code The character of Code is Next_Code_C；If Cur_Code_C！=Next_Code_C, Next_Code_C are placeholder ReplaceChar；Parse the number of encoding bits of the PBS coding each ranks of sample；According to coding sample parsing coding placeholder, calculate Method is：If placeholder ReplaceChar is empty string, every grade of number of encoding bits are actual coding sample digit；If placeholder ReplaceChar is not empty string, then needs the digit that placeholder is weeded out to every grade of coding sample；According to placeholder, each level Several searched successively from top to bottom PBS codings matches, and first searches father node fNode, the attribute of tissue father node fNode and Other data, and the attribute of father node fNode and other data are bound with PBS codings；Search the next stage node of father node Set vChildren, and vChildren is articulated under fNode；Until the subclass vChildren of lookup is that empty end is looked into Look for matching；
5. PBS structure previews；Preview function is provided to the PBS structures mounted.
The tunneling data model that PBS mountings are completed is subjected to export operation, steps are as follows for specific execution：
(i), selection engineering construction model export format and the corresponding version of engineering construction model export format；
(ii), according to the engineering construction model of selection, its engineering construction model data institutional framework is traversed, and apply to this engineering Work model data institutional framework is classified, and mode classification assembles for Product, Part parts, Body bodies；
(iii), according to the engineering construction model data institutional framework got, and the new model data knot of tissue of needs Structure, group weave the model institutional framework of new needs；
(iv), according to the model data institutional framework got, and got after classifying to model data institutional framework Corresponding model attributes data and model figure entity B-Rep data, fill out corresponding engineering construction model data knot of tissue respectively In structure；It is required according to construction work model data institutional framework, and divided after classifying to design result model data institutional framework The correspondence model attributes data and model figure B-Rep data not obtained, are filled into corresponding engineering construction model data group respectively Knit each class node of structure；It is required according to construction work model data, engineering construction model, the geometry entity of design result model Data are made of model geometric model and constructive geometry construction two parts, and wherein model geometric refers to that topological class refers to To class, do not include specific shape information, constructive geometry refers to the statement in model geometric, including actual shape information, The relationship of model geometric and constructive geometry is as follows：Wherein abstract geometry corresponds to model geometric, and specific geometry corresponds to constructive geometry；Root According to the requirement of construction work model data, the export of engineering construction model data needs to carry out precision and model space control, and engineering is applied Precision derived from work model data and model space control formula are as follows：
Set A：Bare minimum (10e-6)
B：Minimum value of standardizing (10e-10)
C：The approximation accuracy (10e-3) of curve and surface
D：It is considered as zero maximum value (10e-11)
Model space computational algorithm：
Model space=A/B=10e-6/10e-10=10e4.
(v), format is exported according to the engineering construction model of selection and export format corresponds to version, the engineering that will be got Engineering construction model attributes data and figure B-Rep data in construction model data organizational structure and each taxonomic structure are led Go out.
As shown in Figures 4 and 5, wherein also being emulated in specific execution operation for rectangular tunnel or prismatic tunnel Experiment equally uses the step of S3-4 new-type tunnel model and carries out execution operation, and the double side wall of the tangible present invention is led In the implementation procedure of hole method tunnel excavation dividing elements, the process split is completely the same, finally can also realize corresponding effect Fruit is converted tunnel-shaped according to different arrangement and method for construction for future, is drawn using the two side-wall pilot tunnel tunnel excavation unit Timesharing is equally realized and quickly splits model, to play significant directive significance to actual constructing tunnel engineering.
The data that above-mentioned steps use need to carry out the acquisition operation of data successively, can be accurately obtained construction in this way The engineering material data that each stage needs, can ensure project estimates precision.And for its configuration of different data Content simultaneously differs, this needs just access above-mentioned working method according to continuous experiment.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this The range of invention is limited by claim and its equivalent.

Claims (3)

1. a kind of two side-wall pilot tunnel tunnel excavation dividing elements method based on BIM technology, which is characterized in that including walking as follows Suddenly：
S1 is designed importing to tunnel model, configured tunneling technique parameter attribute, and the characteristics of according to tunnel excavation engineering method, foundation is opened Dig the constraints in section, generate and excavate cross section profile, excavation face is generated according to tunnel center line, then with engineering design result Model carries out Boolean calculation, obtains and excavates results model；
S2, split cells is generated according to these hierarchical modes, is carried out cell attribute configuration and expansion to these hierarchical modes, is obtained The BIM models of excavation model construction.
2. the two side-wall pilot tunnel tunnel excavation dividing elements method according to claim 1 based on BIM technology, feature It is, the S1 includes：
S1-1 calculates the normal vector vSecNormal in section according to the tunnel section of selection；
S1-2 calculates projection A1 of this on tunnel center line according to any point A on tunnel center line and tunnel section, To obtain tunnel center line A1 points normal plane and tangential direction；The tangential direction of normal vector and A1 points in conjunction with section Vector, the cosine value by calculating its angle determine whether the tangential direction vector of A1 is reversed with expection, finally calculates tunnel Normal vector vProNormal of the center line in A1 normal planes；
S1-3 calculates H direction vectors, then acquire tunnel with the tangential direction of A1, it is specified that with tunnel benchmark excavation line direction for the directions H The directions V that road excavates, calculation formula V=vProNormal*H, i.e. vector V are perspective plane normal vector vProNormal and direction The multiplication cross of vectorial H；
S1-4, according to the tunnel cross section profile of selection, obtain in construction work data the minimum bounding box L in object model section and Bounding box long axis maximum point MaxP and smallest point MinP；
S1-5 calculates kernel of section point minPos according to bounding box the long axis MaxP and MinP acquired in conjunction with perspective plane.
3. the two side-wall pilot tunnel tunnel excavation dividing elements method according to claim 2 based on BIM technology, feature It is, the S2 includes：
S2-1 carries out attribute configuration to each excavation result entity, including：Color, transparency, construction type, personnel, the time into Row assignment；
S2-2 calculates separately out the width and height in tunnel section according to the directions H and V and bounding box long axis length, and calculation formula is：
Projection vector of the bounding box long axis in the directions H：
VHProLen=((((MaxP-MinP) %H)/(H.x*H.x+H.y*H.y+H.z*H.z)) * H)；
Tunnel cross-sectional width：
HLen=sqrt (vHProLen.x*vHProLen.x+vHProLen.y*vHProLen.y+vHProLen.z* vHProLen.z)；
Wherein H is the direction vector that S1-3 is acquired, and H.x/H.y/H.z is respectively the x/y/z coordinates of vector H, vHProLen.x/ VHProLen.y/vHProLen.z is respectively the x/y/z coordinates of vector v HProLen, and sqrt is extraction of square root；
S2-3 combines according to the cross section parameter of input, calculates tunnel section outline excavation；Along tunnel by way of sweeping Center line by tunnel section outline excavation sweeping at excavation face, then by excavation face with excavate body according to after first left and right sides base tunnel up and down Sequence carry out Boolean calculation, obtain excavate results model.
CN201810062148.6A 2018-01-23 2018-01-23 BIM technology-based double-side-wall tunnel excavation unit division method Active CN108280293B (en)

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