A parametric modeling method and system for underground rail transit station structure

Abstract

The present invention discloses a parametric modeling method and system for a rail transit underground station structure, the method comprising: obtaining engineering characteristic parameters of an underground station; establishing a local structural cross-section calculation model of an underground station according to the engineering characteristic parameters of the underground station; based on the local structural cross-section calculation model, carrying out model fusion according to actual engineering requirements to form an overall structural model of the underground station; carrying out grid division based on graphic elements and the engineering characteristic parameters, and forming boundary conditions according to strata and grids; storing section information and load parameters in the underground station structural model in a standard data format to form a final rail transit underground station structural cross-section calculation model; the method realizes automation and standardization of underground station structural design, reduces errors in manual modeling, significantly improves design efficiency and accuracy, and meets personalized design requirements of different engineering projects through flexible model fusion functions.

Description

Technical Field

[0001] The present invention relates to the technical field of underground station structure modeling, and in particular to a parametric modeling method and system for a rail transit underground station structure. Background Art

[0002] The field of rail transit underground station structural design requires a large amount of underground station structural cross-section modeling and calculation work on a daily basis, and specific data content is extracted for analysis and use according to business needs. For rail transit underground station structural design work, the main specific requirements include: main and auxiliary frame geometry requirements. The number of floors and spans of underground stations has various forms according to the nature of the station, passenger density and other factors. The most common ones are 2 floors and 2 spans, 2 floors and 3 spans, etc. Similarly, underground station auxiliary structures also have a variety of floor-span combinations. Therefore, the main cross-section of the underground station varies, and designers need to customize the cross-section structure of the underground station according to specific requirements. Modeling;

[0003] At present, the structural design of underground rail transit stations mostly adopts manual modeling and calculation, and the structural computational mechanics model is manually input into the computer, without forming an automatic modeling process. For the rail transit design industry, especially the field of underground station structure design, data often involves large-span multi-table associations, large data volume, and complex calculation methods. Therefore, the traditional design model is inefficient and has a high error rate in daily work. In order to achieve the above functional requirements, it is necessary to provide a conversion system between key design parameters and structural mechanics models, such as calculating the lateral elastic constraints provided by the soil layer where the underground station structure is located, and applying them to the structural model position corresponding to the soil layer.

[0004] However, the commonly used design methods for underground structures still have the following technical problems in actual operations: designers usually use manual modeling when modeling structures, and the modeling of commercial finite element programs is usually not user-friendly, so designers often need to spend a lot of time on modeling; due to the complexity of modeling, designers often do not consider the retaining structure during station construction, but because the retaining structure is not completely removed after construction, but buried in the soil and bears force together with the station structure, the structural calculation model without the retaining structure is incomplete, and the overall stiffness of the structure is insufficiently considered, which is different from the actual situation, resulting in inaccurate calculation results; due to the complexity of modeling, designers usually use a simplified soil constraint calculation method, that is, taking a weighted average of the constraint stiffness of all soil layers. This method is relatively extensive and deviates from the actual situation on site, resulting in inaccurate calculation results; designers have different modeling habits, resulting in one model for each underground station structure of rail transit, without a unified standard data format, and different modeling methods lead to different calculation results for the same station, which may not be consistent with the actual situation, leading to structural safety problems. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, an object of the present invention is to provide a parametric modeling method and system for a rail transit underground station structure.

[0006] In a first aspect, the present invention provides a parametric modeling method for a rail transit underground station structure, comprising:

[0007] S100, obtaining characteristic parameters of underground station engineering;

[0008] S200, establishing a local structural cross-section calculation model of the underground station according to the characteristic parameters of the underground station project;

[0009] S300, based on the local structure cross-section calculation model, the model is integrated according to actual engineering requirements to form an overall structure model of the underground station;

[0010] S400, performing mesh division based on the graphic elements and the engineering characteristic parameters, and calculating boundary conditions of contact boundaries of each structure;

[0011] S500, applying loads, and storing load parameters in the overall structural model of the underground station in a standard data format to form a final calculation model of the cross-section of the structure of the underground railway station;

[0012] Furthermore, the underground station engineering characteristic parameters in step S100 include but are not limited to the main body floor height, the main body span width and the main body structure burial depth.

[0013] Furthermore, the underground station local structure cross-section calculation model in step S200 includes a main structure model, an auxiliary structure model, a retaining structure model, a capping beam structure model and an anti-pullout pile structure model.

[0014] Furthermore, step S300 includes: obtaining the buried depth of the main structure, the buried depth of the auxiliary structure and the position of the auxiliary structure in the characteristic parameters of the underground station project, and fusing the main structure calculation model, the auxiliary structure calculation model, the enclosure structure calculation model and the pull-out pile structure calculation model according to the above parameters to form an overall calculation model of the underground station structure cross-section.

[0015] Furthermore, the model fusion method includes but is not limited to: main model; main model + subsidiary model; main model + enclosure model; main structure + pull-out pile model; main model + subsidiary model + enclosure model; main model + subsidiary model + pull-out pile model; main model + enclosure model + pull-out pile model; and main model + subsidiary model + enclosure model + pull-out pile model.

[0016] Furthermore, the meshing in step S400 includes meshing based on strata, water levels, main structure layers, auxiliary structure layers, enclosure structures, pull-out pile structures, and maximum unit length.

[0017] Furthermore, the structural contact boundaries in step S400 include: wall-stratum boundaries, slab-stratum boundaries, pile-stratum boundaries, enclosure-stratum boundaries, wall-enclosure contact boundaries and capping beam contact boundaries.

[0018] Furthermore, step S500 also includes storing cross-section information in the underground station structure model, wherein the cross-section information includes component type, cross-section type, component width, component height and component diameter information.

[0019] Furthermore, the load parameters in step S500 include load conditions, load types, load starting points, starting load values, load end points, and end load value parameters.

[0020] In a second aspect, the present invention provides a parametric modeling system for a rail transit underground station structure, characterized in that it is implemented by applying any step in a parametric modeling method for a rail transit underground station structure as described above, including:

[0021] The first module is used to collect and store the characteristic parameters of the underground station project;

[0022] The second module is used to establish a cross-section calculation model of each local structure of the underground station through the engineering characteristic parameters;

[0023] The third module is used to perform arbitrary model fusion based on the local structural cross-section calculation model according to user needs to form an overall structural model of the underground station;

[0024] The fourth module is to perform meshing based on the graphic element and the engineering feature parameters, and generate boundary conditions for the graphic element additional structure;

[0025] The fifth module is used to apply loads, store various load parameters, and form the final cross-sectional calculation model of the rail transit underground station structure.

[0026] Beneficial effects of the present invention:

[0027] 1. The present invention provides a parametric modeling method and system for underground rail transit station structures, which realizes the automation and standardization of underground station structure design, reduces the errors of manual modeling, significantly improves the design efficiency and accuracy, and meets the personalized design of different engineering needs through flexible model fusion functions;

[0028] 2. The present invention provides a parametric modeling method and system for rail transit underground station structures. The system can adapt to various complex underground engineering conditions and ensure the safety and reliability of structural design through fine grid division technology and comprehensive engineering characteristic parameter considerations.

[0029] 3. The present invention provides a parametric modeling method and system for the structure of a rail transit underground station, which adopts a standardized modeling process, realizes the standardization of model data, unifies design standards, reduces human errors, improves the accuracy of the model, and ensures the reliability of the structural design.

[0030] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0032] Figure 1 It is a flow chart of a parametric modeling method for a rail transit underground station structure in an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of constructing a cross-section calculation model of a main structure frame in an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of constructing a calculation model of a cross section of an auxiliary structure frame in an embodiment of the present invention;

[0035] Figure 4 Schematic diagram of the cross-section calculation model of the furnace surrounding structure frame in the embodiment of the present invention;

[0036] Figure 5 Schematic diagram of the construction of the cross-section calculation model of the top beam structure frame in the embodiment of the present invention;

[0037] Figure 6 Schematic diagram of the cross-section calculation model of the pull-out pile structure frame in the embodiment of the present invention

[0038] Figure 7 Schematic diagram of various combination results of the local structural frame cross-section calculation model in the embodiment of the present invention DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0041] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as in the embodiments of this application.

[0042] Example 1

[0043] An embodiment of the present invention provides a parametric modeling method for a rail transit underground station structure, comprising:

[0044] S100, obtaining characteristic parameters of underground station engineering;

[0045] S200, establishing a local structural cross-section calculation model of the underground station according to the characteristic parameters of the underground station project;

[0046] S300, based on the local structure cross-section calculation model, the model is integrated according to actual engineering requirements to form an overall structure model of the underground station;

[0047] S400, performing mesh division based on the graphic elements and the engineering characteristic parameters, and calculating boundary conditions of contact boundaries of each structure;

[0048] S500, storing the cross-section information and load parameters in the underground station structure model in a standard data format to form a final rail transit underground station structure cross-section calculation model;

[0049] Step S200 specifically includes:

[0050] S201, such as Figure 2 As shown, the main body floor height, main body span width, and main structure buried depth in the underground station engineering characteristic parameters are obtained, and the above parameters are converted into a cross-section calculation model of the main structure of the underground station;

[0051] The main body layer height is a positive integer array, the number of its elements represents the number of layers of the main structure, the elements in the array are arranged in order, representing the layer heights of each layer from top to bottom of the cross section of the main structure, the number of its elements is m, and its format is:

[0052]

[0053] Furthermore, the main body span width is a positive integer array, the number of its elements represents the number of spans of the main structure, the elements in the array are arranged in order, representing the span widths of each span of the main structure from left to right, the number of its elements is n, and its form is:

[0054] S=[s 1 s 2 s 3 …s n ]

[0055] Furthermore, the main structure buried depth d is a positive number, representing the distance from the axis of the top plate of the main structure of the underground station to the ground;

[0056] The X coordinate set of the main structure nodes and the Z coordinate set of the main structure nodes are calculated according to the above parameters.

[0057] Among them, the main structure node X coordinate set is a positive array, the elements in the array are arranged in order, representing the set of X coordinates of all the main component nodes, the number of elements is n+1, and the calculation formula of the elements in the set is:

[0058]

[0059] Its form is:

[0060] X=[x 0 x 1 x 2 …x n ]=[0s 1 s 1 +s 2 …s 1 +s 2 +…+s n ];

[0061] Furthermore, the Z coordinate set of the main structure node is a positive number array, and the elements in the array are arranged in order, representing the set of Z coordinates of all the main component nodes, the number of elements is m+1, and the calculation formula of the elements in the set is:

[0062]

[0063] Its form is:

[0064]

[0065] Furthermore, the main structure node X coordinate set and the main structure node Z coordinate set are cross-combined to form a main structure node set P, which is in the form of:

[0066]

[0067] In the formula, p represents the node, and its subscript represents the index number of the node coordinate x and z coordinates in the main structure node X coordinate set and the main structure node Z coordinate set, that is, p mn The x coordinate of n , the z coordinate is z m .

[0068] Furthermore, through the program, each row in the main structure node set is traversed, and each element and its next element are combined to form a main structure horizontal component set, which is in the form of:

[0069]

[0070] In the formula, b represents the horizontal component, and its subscript represents the start and end node index number of the horizontal component, that is, b m1m2 Indicates that the starting point of the horizontal component is p m1 , the end point is p m2 .

[0071] Furthermore, through the program, each column in the main structure node set is traversed, and each element and its next element are combined to form a main structure vertical component set, which is in the form of:

[0072]

[0073] In the formula, c represents the vertical component, and its subscript represents the start and end node index number of the vertical component, that is, c 1n2n Indicates that the starting point of the horizontal component is p 1n , the end point is p 2n .

[0074] Furthermore, the main structure horizontal component set and the main structure vertical component set are collectively referred to as the underground station main structure cross-section calculation model.

[0075] S202, such as Figure 3 As shown, the height of the auxiliary storey, the width of the auxiliary span, and the buried depth of the auxiliary structure in the characteristic parameters of the underground station project are obtained, and the above parameters are converted into a cross-sectional calculation model of the auxiliary structure of the underground station;

[0076] The auxiliary layer height is a positive integer array, the number of its elements represents the number of layers of the auxiliary structure, the elements in the array are arranged in order, representing the layer heights of each layer from top to bottom of the cross section of the auxiliary structure, the number of its elements is m, and its format is:

[0077]

[0078] In the formula, F l is the height of the left auxiliary floor, F r This is the height of the auxiliary floor on the right.

[0079] Furthermore, the auxiliary span width is a positive array, the number of its elements represents the number of spans of the auxiliary structure, the elements in the array are arranged in order, representing the span width of each span from left to right in the cross section of the auxiliary structure, the number of its elements is n, and its form is:

[0080]

[0081]

[0082] In the formula, S l is the left auxiliary span width, S r The width of the right side auxiliary span.

[0083] Furthermore, the buried depth of the auxiliary structure is a positive number, representing the distance from the top plate of the main structure of the underground station to the ground;

[0084] Furthermore, the X coordinate set of the subsidiary structure nodes and the Z coordinate set of the subsidiary structure nodes are calculated according to the above parameters.

[0085] Among them, the X-coordinate set of the nodes of the subsidiary structure is a positive array. The elements in the array are arranged in order, representing the set of X-coordinates of all the component nodes of the subsidiary structure. The number of elements is n+1. The calculation formula of the elements in the set is:

[0086]

[0087] Its form is:

[0088]

[0089] Where, X l is the X coordinate set of the left attached structure node, X r It is the X coordinate set of the right subsidiary structure node.

[0090] Among them, the Z coordinate set of the subsidiary structure nodes is a positive array. The elements in the array are arranged in order, representing the set of Z coordinates of all the main component nodes. The number of elements is m+1. The calculation formula of the elements in the set is:

[0091]

[0092] Its form is:

[0093]

[0094] Furthermore, the auxiliary structure node X coordinate set and the auxiliary structure node Z coordinate set are cross-combined to form an auxiliary structure node set P, which is in the form of:

[0095]

[0096]

[0097] In the formula, p represents a node, and its subscript represents the index number of the x and z coordinates of the point in the X coordinate set of the attached structure node and the Z coordinate set of the attached structure node, that is, p mn The x coordinate of n , the z coordinate is z m .

[0098] Furthermore, through the program, each row in the subsidiary structure node set is traversed, and each element and its next element are combined to form a subsidiary structure horizontal component set, which is in the form of:

[0099]

[0100] In the formula, b represents the horizontal component, and its subscript represents the start and end node index number of the horizontal component, that is, b m1m2 Indicates that the starting point of the horizontal component is p m1 , the end point is p m2 .

[0101] Furthermore, through the program, each column in the auxiliary structure node set is traversed, and each element and its next element are combined to form an auxiliary structure vertical component set, which is in the form of:

[0102]

[0103] In particular, since the right axis of the left subsidiary coincides with the main structure, the vertical component of the right axis of the left subsidiary is not generated; since the left axis of the right subsidiary coincides with the main structure, the vertical component of the left axis of the right subsidiary is not generated.

[0104] In the formula, c represents the vertical component, and its subscript represents the start and end node index number of the vertical component, that is, c 1n2n Indicates that the starting point of the horizontal component is c 1n , the end point is c 2n .

[0105] Among them, the horizontal component set of the auxiliary structure and the vertical component set of the auxiliary structure are collectively called the cross-sectional calculation model of the auxiliary structure of the underground station.

[0106] S203, such as Figure 4As shown, the bottom buried depth of the components of the underground station enclosure structure and the full height of the main structure of the underground station are obtained, and they are converted into a cross-sectional calculation model of the underground station enclosure structure; the component buried depth dr is a positive floating point number, and the full height of the main structure is a positive floating point number; the enclosure structure includes the top beam, ground-connected wall, and enclosure piles in the foundation pit support;

[0107] Among them, the left enclosure structure coordinates The left axis of the main structure is translated to the left by half the wall thickness and to the left by half the thickness of the enclosure structure; the coordinates of the enclosure structure on the right are The right axis of the main structure is translated to the right by half the wall thickness and to the right by half the thickness of the enclosure structure, that is:

[0108]

[0109] Furthermore, the starting coordinates of the enclosure structures on both sides The axis of the main structure top plate is translated upward by half the top plate thickness and the thickness of the top beam; the end coordinates of the enclosure structures on both sides are The axis of the main structure bottom plate is translated downward by half the bottom plate thickness and the buried depth of the enclosure structure is translated downward, that is:

[0110]

[0111] Furthermore, by combining the coordinates of the enclosure structure through the program, the node set P of the enclosure structure model can be obtained. re :

[0112]

[0113] Furthermore, through the program, each column in the node set of the enclosure model is traversed, and each element and its next element are combined to form an enclosure component set, which is in the form of:

[0114]

[0115] In the formula, C re Represents a vertical component, and its subscript represents the start and end node index number of the horizontal component, that is, Indicates that the starting point of the horizontal component is End point

[0116] S204, such as Figure 5 As shown in the figure, the vertical coordinate z of the top plate of the main structure is obtained 0 、Top plate thickness of the main structure H b 0 , Height of top beam section H t , the left axis horizontal coordinate x of the main structure 0 And the right axis horizontal coordinate x of the main structure n, convert the above parameters into the calculation model of the cross-section of the top beam of the underground station.

[0117] Among them, the starting point coordinates of the left top beam are the same as the x coordinates of the left retaining structure, that is, The end point coordinate is the same as the x coordinate of the left axis of the main structure, that is, x 0 ; The starting point coordinate of the right top beam is the same as the x coordinate of the right axis of the main structure, that is, x n , the end point coordinate is the same as the x coordinate of the right enclosure structure, that is The X coordinate set of the top beam can be expressed as:

[0118]

[0119] Furthermore, the Y coordinate of the top beam is half the thickness of the top plate and half the thickness of the top beam, that is,

[0120]

[0121] Among them, the cross-combination of the top beam X coordinate set and the top beam Z coordinate set can obtain the top beam structure model node set P t :

[0122]

[0123] Furthermore, the elements in the node set can be combined in pairs to form a capping beam structure set:

[0124]

[0125] Where b t 0010 It represents the horizontal component of the top beam, and its starting point is p t 00 , the end point is p t 10

[0126] S205, such as Figure 6 As shown, the component length and component location of the components of the anti-floating structure of the underground station are obtained, and converted into a cross-sectional calculation model of the anti-floating structure of the underground station; the component length is a positive floating point number; the component location represents the minimum value of its horizontal coordinate and the main structure component location coordinate, which is a positive floating point number; the retaining structure includes the capping beam, ground-connected wall, and retaining piles in the foundation pit support;

[0127] Among them, the pull-out pile positioning X p It is an integer array, which is arranged in order and represents the distance between the axis of the pull-out pile and the left axis of the main structure, as follows:

[0128]

[0129] Furthermore, the top coordinates of the pull-out piles are the coordinates of the bottom plate of the main structure; the bottom coordinates of the pull-out piles are the coordinates of the axis of the bottom plate of the main structure translated downward by half the thickness of the bottom plate and the length of the pull-out piles, that is:

[0130]

[0131] Among them, the cross-combination of the pull-out pile positioning X coordinate set and the pull-out pile positioning Y coordinate set can obtain the pull-out pile positioning point set P p :

[0132]

[0133] In the formula, p p Represents a node, and its subscript represents the index number of the x and z coordinates of the point in the node X coordinate set and the node Z coordinate set, that is, p mn The x coordinate of m , the z coordinate is z n .

[0134] Furthermore, the elements of each column in the pull-out pile positioning point set are combined in pairs to form a pull-out pile set:

[0135]

[0136] Step S300 specifically includes: obtaining the buried depth of the main structure, the buried depth of the auxiliary structure, and the position of the auxiliary structure, and integrating the main structure calculation model, the auxiliary structure calculation model, the enclosure structure calculation model, and the anti-floating structure calculation model according to the above parameters to form an overall calculation model of the cross-section of the rail transit underground station structure;

[0137] Among them, the model fusion can include only the main structure model according to the actual engineering needs, or the main model can be arbitrarily combined with several other parts. The combination of models includes but is not limited to: main model; main model + auxiliary model; main model + enclosure model; main structure + pull-out pile model; main model + auxiliary model + enclosure model; main model + auxiliary model + pull-out pile model; main model + enclosure model + pull-out pile model; and main model + auxiliary model + enclosure model + pull-out pile model, such as Figure 7 shown.

[0138] In particular, when the auxiliary structure is integrated with the retaining structure on the same side at the same time, the top beam on that side is not integrated, and the vertical coordinate of the starting point of the retaining structure on that side is modified to the bottom plate coordinate zm of the auxiliary structure on that side.

[0139] The specific steps of S400 include:

[0140] S401, based on stratum division: obtain stratum thickness, convert it into a grid division reference Z coordinate set, traverse all vertical components in the overall model, project all Z coordinates in the grid division reference Z coordinate set onto the vertical components to form intersections, which are component unit segmentation points.

[0141] The stratum thickness is a positive array, and the elements in the array are arranged in order, representing the thickness of the stratum at the station cross section from top to bottom. The number of elements is the same as the number of strata, m, and its format is as follows:

[0142]

[0143] Furthermore, the grid division benchmark Z coordinate set is a positive array. The elements in the array are arranged in order, representing the coordinates of the interfaces of each soil layer from top to bottom relative to the ground with the ground as the coordinate 0 point. The number of elements is m+1. The calculation formula of the elements in the set is:

[0144]

[0145] Its form is:

[0146]

[0147] Furthermore, traversing the vertical components in the overall model, the vertical components can be expressed as The component start and end point set can be expressed as:

[0148]

[0149] Its starting point is End point The starting and ending points of the vertical component have the same horizontal coordinates, both xn, the starting point horizontal coordinate zi, and the ending point vertical coordinate zj. The horizontal coordinates of the component are intersected with the grid division reference Z coordinate set to form a unit stratum division point set, which is in the form of:

[0150]

[0151] In the formula, p eq mn is the grid division point, whose X coordinate is x n , the Z coordinate is z q m .

[0152] Furthermore, the union of the grid division points and the component start and end points is taken, and sorted by Z coordinate, and the node set of the component start and end points and the closed interval formed by them is taken as the component unit stratigraphic division point subset:

[0153]

[0154] S402, based on the main structure layer division: obtain the main structure node Z coordinate set, traverse all the vertical components of the enclosure structure, and project all the Z coordinates in the grid division base Z coordinate set onto the vertical components to form intersections, which are the main layer division point subsets of the component unit.

[0155] The Z coordinate set of the main structure nodes is the same as above;

[0156] Furthermore, all vertical components of the enclosure structure are traversed, and the vertical components can be expressed as c re injn , its starting and ending points can be expressed as:

[0157]

[0158] Furthermore, the starting point is End point The starting and ending points of the vertical components have the same horizontal coordinates, both x re n , starting point horizontal coordinate z re i , the end point ordinate z re j , the component horizontal coordinates are intersected with the grid division base Z coordinate set to form a grid division point set, which is in the form of:

[0159]

[0160] In the formula, p em mn is the grid division point, whose X coordinate is x n , the Z coordinate is z re m .

[0161] Furthermore, the union of the grid division points and the starting and ending points of the component is taken, and sorted by Z coordinate, and the node set of the starting and ending points of the component and the closed interval formed by them is taken as the component grid division point set:

[0162]

[0163] Among them, S400 also includes division based on water level, division based on subsidiary layer, division based on enclosure and division based on pile position, and the method is the same as above.

[0164] S403, division based on maximum unit length: taking the union of all unit segmentation point subsets of each component to form a component unit segmentation point set; arranging the segmentation points in ascending order according to the distance from the component starting point; checking the segmentation point spacing, and performing interpolation operations on the spacings that are greater than the maximum unit length, so that the segmentation point spacings are all less than the maximum unit length.

[0165] Furthermore, the component unit segmentation point set refers to the J above. eq , J ew , J em , J el , J er , J re , Jep, taking the union and sorting the above subsets, we get:

[0166]

[0167] Further, traverse the element j in the component unit segmentation point set m , calculate j m and m+1 The distance between two points, if the distance is greater than the maximum unit length, insert a point between the two points:

[0168]

[0169] The specific operations include:

[0170] 1. According to and 's x and z coordinates, calculate the distance s between the two points;

[0171] 2. Calculate the number of segmentation units nv between the two points based on the distance s between the two points and the maximum unit length dv.

[0172] 3. Calculate the segmentation point spacing s1 by using the distance s between the two points and the number of segments nv;

[0173] 4. In arrive Insert points on the line segment between with a spacing of s1.

[0174] The step of calculating the boundary condition of the contact boundary between the stratum and the grid in step S400 specifically includes:

[0175] S404, calculating the boundary conditions of the wall-stratum boundary: generating boundary conditions for the left axis vertical component of the main structure, the right axis vertical component of the main structure, the left axis vertical component of the left auxiliary structure, and the right axis vertical component of the right auxiliary structure.

[0176] Furthermore, a set of unit segmentation points of the above components is extracted, the geological characteristics of the location of the underground station are obtained, and the geological characteristics of the location of the segmentation points are converted into boundary conditions.

[0177] Among them, the calculation unit split point The boundary conditions are implemented as follows:

[0178] 1. Calculation With its previous split point and the next split point The distances s1 and s2.

[0179] 2. Take The Z coordinate of the point zm, then The influence range in the stratum is the closed interval [zm+s1,zm-s2].

[0180] 3. Get the Z coordinate of the stratum Zq = [z0, z1, z2…], traverse the set, the range of the soil layer n is the closed interval [zn, zn+1], and calculate the intersection of the soil layer range and the influence range of the split point.

[0181] 4. For soil layers with intersections, the horizontal bed coefficient of the soil layer is multiplied by the length of the intersection range to calculate the horizontal stiffness K of the soil layer. n .

[0182] 5. For all K n The sum is the horizontal stiffness K of the split point j .

[0183] In particular, when calculating the horizontal stiffness of the main structure division point, it is necessary to first calculate the closed interval [zl0,zlm] or [zr0,zrm] composed of the Z coordinates of the top plate and bottom plate attached to the left or right side, and take the intersection of the above closed interval and the node influence range as the value of the node influence range.

[0184] Wherein, the step S400 also includes calculating the boundary conditions of the plate-stratum boundary, calculating the boundary conditions of the pile-stratum boundary and calculating the boundary conditions of the enclosure-stratum boundary, and the method is similar to the method of calculating the boundary conditions of the wall-stratum boundary.

[0185] S405, calculating the boundary conditions of the wall-enclosure contact boundary: extracting the unit segmentation points of the wall on one side of the main structure and the enclosure structure on the same side, and generating the contact boundary between the main structure and the enclosure structure.

[0186] Furthermore, the specific operations include:

[0187] 1. Extract the unit division points on the wall on one side of the main structure and the unit division points of the enclosure structure on the same side

[0188] 2. Group the two points with the same Z coordinates in the two sets together.

[0189] 3. Calculate the influence range of each group of nodes.

[0190] 4. Calculate the elastic modulus of the wall and the enclosure structure based on the weighted average elastic modulus of the component thickness.

[0191] 5. The weighted average elastic modulus multiplied by the influence range gives the contact boundary spring stiffness.

[0192] 6. Construct a two-point spring with the starting and ending points being two nodes in a group.

[0193] 7. Continue with the next set of operations.

[0194] S406, calculating the boundary conditions of the contact boundary of the top beam: extracting the left axis node and the right axis node of the top plate of the main structure, and their corresponding top beam nodes, and generating the contact boundary between the main structure and the top beam.

[0195] 1. There are two groups of contact boundaries of the top beam, one of which is the p 00 p in the point and top beam model t 10 The second is the boundary between the main structure model 0n p in the point and top beam model t 20 The boundary between points.

[0196] 2. Calculate the influence range of each group of nodes, that is, the thickness of the main structure wall.

[0197] 3. Calculate the elastic modulus of the main top plate and the top beam according to the weighted average elastic modulus of the component thickness.

[0198] 4. Multiply the weighted average elastic modulus by the influence range to obtain the contact boundary spring stiffness.

[0199] 5. Construct a two-point spring with the starting and ending points being two nodes in a group.

[0200] Step S500 specifically includes:

[0201] S501. Store information such as component type, section type, component width, component height, and component diameter into the model.

[0202] S502, applying load, and storing the obtained load parameters in the underground station structure model in a standard data format to form a final rail transit underground station structure cross-section calculation model.

[0203] The load parameters include: load condition, load type, load starting point, starting point load value, load end point and end point load value.

[0204] Furthermore, the final calculation model of the cross-section of the rail transit underground station structure is input into the finite element software for calculation, and the calculation results under various working conditions can be obtained.

[0205] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0206] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A parametric modeling method for underground rail transit station structure, characterized in that: include: S100, obtaining characteristic parameters of underground station engineering; the characteristic parameters of underground station engineering include but are not limited to main body floor height, main body span width, main structure buried depth, auxiliary floor height, auxiliary span width, auxiliary structure buried depth and auxiliary structure position; S200, establishing a local structural cross-section calculation model of the underground station according to the characteristic parameters of the underground station project; The local structural cross-section calculation model of the underground station includes a main structure model, an auxiliary structure model, a retaining structure model, a capping beam structure model and an anti-pullout pile structure model; The establishment of the main structure model includes: According to the main body layer height, main body span width, and main structure buried depth parameters, calculate the X coordinate set and Z coordinate set of the main structure nodes; cross-combine the main structure node X coordinate set and the main structure node Z coordinate set to form a main structure node set; through the program, traverse each row in the main structure node set, combine each element and its next element to form a main structure horizontal component set; through the program, traverse each column in the main structure node set, combine each element and its next element to form a main structure vertical component set; the main structure horizontal component set and the main structure vertical component set are collectively called the underground station main structure cross-section calculation model; The establishment of the subsidiary structure model includes: According to the auxiliary storey height, auxiliary span width, and auxiliary structure buried depth parameters, calculate the auxiliary structure node X coordinate set and the auxiliary structure node Z coordinate set; cross-combine the auxiliary structure node X coordinate set and the auxiliary structure node Z coordinate set to form an auxiliary structure node set; through the program, traverse each row in the auxiliary structure node set, combine each element and its next element to form an auxiliary structure horizontal component set; through the program, traverse each column in the auxiliary structure node set, combine each element and its next element to form an auxiliary structure vertical component set; the auxiliary structure horizontal component set and the auxiliary structure vertical component set are collectively referred to as the underground station auxiliary structure cross-section calculation model; The establishment of the enclosure structure model includes: According to the bottom buried depth of the components of the underground station enclosure structure and the total height of the main structure of the underground station, the coordinates of the left enclosure structure, the coordinates of the right enclosure structure, the coordinates of the starting point of the enclosure structure on both sides, and the coordinates of the end point of the enclosure structure on both sides are calculated; through the program, the enclosure structure coordinates are combined to obtain the enclosure structure model node set; through the program, each column in the enclosure structure model node set is traversed, and each element and its next element are combined to form the enclosure structure cross-section calculation model; The establishment of the capping beam structure model includes: According to the main structure top plate ordinate, the main structure top plate thickness, the top beam cross-section height, the main structure left axis horizontal coordinate, the main structure right axis horizontal coordinate; combined with the left top beam starting point coordinate, the left top beam end point coordinate, the right top beam starting point coordinate, the right top beam end point coordinate to obtain the top beam X coordinate set and the top beam Z coordinate; cross-combined the top beam X coordinate set and the top beam Z coordinate set to obtain the top beam structure model node set; elements in the top beam structure model node set are combined in pairs to form a top beam structure cross-section calculation model; The establishment of the pull-out pile structure model includes: Obtain the length and location of the components of the anti-floating structure of the underground station; obtain the X coordinate set and Z coordinate set of the pull-out pile location; cross-combine the X coordinate set and Z coordinate set of the pull-out pile location to obtain the pull-out pile location point set; combine the elements of each column in the pull-out pile location point set in pairs to form a cross-section calculation model of the pull-out pile structure; S300, based on the local structure cross-section calculation model, the model is integrated according to actual engineering requirements to form an overall structure model of the underground station; The model fusion methods include but are not limited to: main model; main model + subsidiary model; main model + enclosure model; main structure + pull-out pile model; main model + subsidiary model + enclosure model; main model + subsidiary model + pull-out pile model; main model + enclosure model + pull-out pile model; and main model + subsidiary model + enclosure model + pull-out pile model; S400, performing mesh division based on the graphic elements and the engineering characteristic parameters, and calculating boundary conditions of contact boundaries of each structure; The grid division includes: grid division based on strata, water level, main structure layer, auxiliary structure layer, enclosure structure, anti-pulling pile structure and maximum unit length; The structural contact boundaries include: wall-stratum boundary, slab-stratum boundary, pile-stratum boundary, enclosure-stratum boundary, wall-enclosure contact boundary and capping beam contact boundary; S500, applying loads, and storing load parameters in the overall structure model of the underground station in a standard data format, so as to form a final cross-section calculation model of the rail transit underground station structure.

2. A parametric modeling method for underground rail transit station structure according to claim 1, characterized in that: Step S300 includes: fusing the main structure calculation model, the auxiliary structure calculation model, the enclosure structure calculation model and the pull-out pile structure calculation model to form an overall calculation model of the underground station structure cross section.

3. The parametric modeling method for a rail transit underground station structure according to claim 1, characterized in that: In step S400: The stratum-based grid division includes: obtaining stratum thickness, converting it into a grid division reference Z coordinate set, traversing all vertical components in the overall model, and projecting all Z coordinates in the grid division reference Z coordinate set onto the vertical components to form intersections, which are component unit segmentation points; Meshing based on the main structure layer includes: obtaining the Z coordinate set of the main structure nodes, traversing all the vertical components of the enclosure structure, and projecting all the Z coordinates in the meshing reference Z coordinate set onto the vertical components to form intersections, which are the main layer division point subsets of the component unit; Meshing based on the maximum unit length includes: taking the union of all unit division point subsets of each component to form a component unit division point set; arranging the division points in ascending order of distance from the component starting point; checking the division point spacing, and performing interpolation operations on the spacing greater than the maximum unit length to make the division point spacing less than the maximum unit length.

4. A parametric modeling method for underground rail transit station structure according to any one of claims 1 to 3, characterized in that: Step S500 also includes storing cross-section information in the underground station structure model, wherein the cross-section information includes component type, cross-section type, component width, component height and component diameter information.

5. A parametric modeling method for underground rail transit station structure according to any one of claims 1 to 3, characterized in that: The load parameters in step S500 include load condition, load type, load starting point, starting point load value, load end point, and end point load value.

6. A parametric modeling system for underground rail transit station structure, characterized in that: The method is implemented by applying a parametric modeling method for a rail transit underground station structure according to any one of claims 1 to 5, comprising: The first module is used to collect and store the characteristic parameters of the underground station project; The second module is used to establish a cross-section calculation model of each local structure of the underground station through the engineering characteristic parameters; The third module is used to perform arbitrary model fusion based on the local structural cross-section calculation model according to user needs to form an overall structural model of the underground station; The fourth module is to perform meshing based on the graphic element and the engineering feature parameters, and generate boundary conditions for the graphic element additional structure; The fifth module is used to apply loads, store various load parameters, and form the final cross-sectional calculation model of the rail transit underground station structure.

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