CN115600300A - A long-distance multi-section channel modeling method based on Civil3D - Google Patents

Abstract

The present invention relates to a long-distance multi-section channel modeling method based on Civil3D, including: summarizing various section forms into a variable trapezoidal section, setting offset targets and elevation targets for key control points of the variable trapezoidal section, and creating Variable trapezoidal section parts; according to the actual situation of the channel to be modeled, the section form and section design parameters are laid out along the route chainage, and the layout information is processed to obtain the target parameter polyline; the road area is created based on the variable trapezoidal section parts, and the target The parametric polylines are correspondingly assigned to the road area, and the channel modeling is completed according to the conventional process after mirroring. The present invention takes the variable trapezoidal section as the basic unit, converts the process of creating multi-section and multi-road areas into the process of calculating the key control line of a single variable trapezoidal section, and only needs to create one road area, which greatly reduces the number of road model areas. It greatly improves the efficiency of model creation, effectively reduces the cost of design changes, and shortens the design cycle.

Description

A long-distance multi-section channel modeling method based on Civil3D

technical field

The invention relates to the technical field of water conservancy engineering channel modeling, in particular to a Civil3D-based long-distance multi-section channel modeling method.

Background technique

With the widespread application of BIM technology, the water conservancy industry has gradually realized 3D forward design and in-depth application based on Civil3D. At the same time, some specific types of projects put forward higher and higher requirements for the efficiency and accuracy of 3D modeling. The design of water diversion projects often involves long-distance and multi-section channel modeling requirements. For example, the channel model shown in Figure 1 includes trapezoidal sections, gradient sections, rectangular sections, gradient sections, trapezoidal sections, and gradient sections from bottom to top. , Rectangular section, Gradient section, Trapezoidal section, Gradient section, Rectangular section, etc. There are many features, so how to conduct fast and accurate modeling has a great impact on the entire design cycle.

For such a long-distance multi-section channel, the 3D design program using the road function in traditional Civil3D is complicated and the gradient section is not easy to realize: in the traditional Civil3D modeling method, the road area is usually used as the basic unit (each section is A road area), respectively create custom parametric components of different cross-sectional sizes and forms (that is, create different assemblies) for three different forms of channel segments: rectangular segment, trapezoidal segment and transition segment, and then combine them for modeling. Although this method can meet the basic modeling requirements, it has the following limitations:

1. It is necessary to create different assemblies for different forms of channel segments, which will increase the number of custom components, the number of parameters and the number of areas of the road model;

2. In actual modeling, the calculation of the offset logic target line of the gradient segment assembly is complicated, and manual calculation is difficult to achieve;

3. When the number of road areas gradually increases, the efficiency of Civil3D modeling will be greatly reduced or even stuck.

Therefore, the traditional modeling method is difficult to realize the modeling of the gradient section, and the overall modeling efficiency becomes lower and lower with the increase of the number of road model areas. It has brought a lot of inconvenience.

Contents of the invention

The technical problem to be solved by the present invention is to provide a Civil3D-based long-distance multi-section channel modeling method to improve the modeling speed.

In order to solve the above problems, a long-distance multi-section channel modeling method based on Civil3D of the present invention, the method includes:

Create variable trapezoidal section components: summarize various section forms into a variable trapezoidal section, set offset targets and elevation targets for key control points of the variable trapezoidal section, parameterize key control point variables, and create corresponding The variable trapezoidal section part;

Calculate the target parameter polyline: according to the actual situation of the channel to be modeled, lay out the cross-section form of each channel along the route stake number and the cross-section design parameters under this section form, and process the layout information to obtain the target parameter polyline, The target parameter polyline includes the offset target line and the elevation target line of the variable trapezoidal section under each pile number;

Create a channel model: based on the variable trapezoidal section component, create a road area with the same number of chainages as the channel to be modeled, assign the data of the target parameter polyline to the road area and perform mirroring, Then follow the normal process to complete the channel modeling.

Preferably, the creation of a variable trapezoidal section component includes: in the component editor of Civil3D, taking the middle point of the canal bottom as the base point, pre-defining the parameters of the canal top width, canal bottom width and canal depth, at the right vertex of the canal top, Set the offset target parameter at the right vertex of the canal bottom, and set the elevation target parameter at the top of the canal to create a variable trapezoidal section component, and then obtain the corresponding guid code.

Preferably, in the creation of the channel model, according to the guid code of the variable trapezoidal section parts, the program background calls the SubassemblyCollection.ImportSubassembly interface, loads the variable trapezoidal section parts and automatically assembles and creates them; then calls the road model creation API to create a pile road area with the same number as the channel to be modeled.

Preferably, the determination of the target parameter polyline includes: performing secondary development based on Civil3D, setting a visual parameter input interface; obtaining user-input layout information through the visual parameter input interface, and according to the layout information, along the channel centerline The positioning points of the offset target line and the elevation target line under different variable trapezoidal sections are calculated by stake number, and the target parameter polyline is generated.

Compared with the prior art, the present invention has the following advantages:

In the present invention, secondary development is carried out based on Civil3D, a variable trapezoidal section assembly is created by summarizing and abstracting the section form, and the variable trapezoidal section is used as the basic unit to flexibly convert the process of creating multi-sections and multi-road areas into calculating a single variable The process of the key control line of the trapezoidal section, and only one road area needs to be created, which greatly reduces the number of road model areas, greatly improves the efficiency of model creation, and can effectively improve the performance of long-distance multi-section water diversion projects. Modeling efficiency and design efficiency, which can effectively reduce the cost of design changes and shorten the design cycle.

Description of drawings

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of a multi-section channel model in the present invention.

Fig. 2 is a schematic diagram of a curved surface model of a channel excavation in the present invention.

Fig. 3 and Fig. 4 are partial setting interfaces of the variable trapezoidal section assembly in the present invention.

Fig. 5 is a partial user interaction interface in the present invention.

Fig. 6 is a diagram of the calculation result of the offset target line in the present invention.

FIG. 7 is a partially enlarged view of FIG. 6 .

Fig. 8 is a schematic diagram of region merging of the implementation results of the present invention.

detailed description

The embodiment of the present invention provides a long-distance multi-section channel modeling method based on Civil3D. The method specifically includes the following steps:

(1) Create variable trapezoidal section components: summarize various section forms into a variable trapezoidal section, set offset targets and elevation targets for key control points of the variable trapezoidal section, parameterize key control point variables, and create Corresponding variable trapezoidal section components.

Specifically, there are many cross-sections of different sizes and forms involved in long-distance canal engineering, and the common forms include entrance transition section, trapezoidal canal, transition section, rectangular canal, and exit transition section. These sections are all symmetrical about the midpoint of the canal bottom, including the section structure, foundation, and excavation. Therefore, these sections can be summarized as a variable trapezoidal section, and then through key control points (such as the width of the canal top, the width of the canal bottom, and the Canal depth) to dynamically change the section shape.

In the component editor of Civil3D, the key control point parameters such as the canal top width, canal bottom width and canal depth are predefined based on the midpoint of the canal bottom, and the offset target parameters are set at the right vertex of the canal top and the right vertex of the canal bottom. Set the elevation target parameters at the top of the canal, and set a specific parameter name for each target parameter. Refer to Figure 3 for the setting interface. According to the above parameters, a parameterized variable trapezoidal cross-section component is drawn, as shown in Figure 4. Add point, line, and shape codes to the completed parts, and then import them into Civil3D to automatically generate unique guid codes corresponding to variable trapezoidal section parts.

(2) Calculate the target parameter polyline: according to the actual situation of the channel to be modeled, lay out the section form of each section of the channel along the route stake number and the section design parameters under this section form, and process the layout information to obtain the target parameter polyline Line, the target parameter polyline includes the offset target line and the elevation target line of the variable trapezoidal section under each chainage.

In theory, if the offset target parameters and elevation target parameters (both polylines) of the variable trapezoidal section under each chainage on the channel to be modeled are known, the channel model can be created directly based on the variable trapezoidal section assembly; but in In actual engineering, the offset target parameters and elevation target parameters are usually not directly obtained from the engineering construction data, but must be obtained indirectly through the conversion of the section design parameters on two continuous channel segments, so step (2) is set to calculate the target Parametric polyline.

In practical applications, the implementation steps of step (2) to calculate the target parameter polyline can refer to the following:

(21) Carry out secondary development based on Civil3D, and set the Winform visual parameter input interface as the data input terminal; the user, according to the actual situation of the channel to be modeled, on the visual parameter input interface, arranges the stake interval of each channel along the route according to the design concept , section form and design parameters under the section form. For example, in Figure 5, in "Building Layout", you can set the range of "Start and Stop Stake", and select the building form within the range of the stake number. The building form includes trapezoidal drainage ditch, gradient section, and rectangular drainage ditch. etc.; in the "Section Design", set the "Canal Bottom Width", "Canal Depth", "Slope" and "Roughness" of the section of the given building form.

(22) Obtain the layout information input by the user through the visual parameter input interface, and calculate the positioning points of the offset target line and elevation target line under different variable trapezoidal sections along the center line of the channel according to the layout information, and generate the target parameter polyline .

In the present invention, the section design parameters of different section forms will be different, for example: the section design parameters of the rectangular section and the trapezoidal section are the width of the bottom of the canal, the depth of the canal and the length of the side slope; There are three types: middle gradient section and exit gradient section. The section design parameters of the entrance transition section are the entrance width and slope; A section parameter. According to these section design parameters, combined with the front and rear positional relationship and geometric relationship of the section, the offset target parameters and elevation target parameters (polyline) of the variable trapezoidal section under each pile number can be converted, corresponding to the offset target and elevation target the positioning point. Both offset parameters are based on the centerline of the channel, and a point is calculated every 0.1m along the route to generate the offset target line and elevation target line. As shown in Figure 6 and Figure 7, set these polylines on a fixed layer at the same time for easy management.

(3) Create a channel model: Based on the variable trapezoidal section components, create a road area with the same number of chainages as the channel to be modeled, assign the data of the target parameter polyline to the road area and perform mirroring, and then complete according to the conventional process Channel modeling.

Specifically, based on the Civil3D platform, the C# language is used for secondary development. According to the guid code of the variable trapezoidal section components, the SubassemblyCollection.ImportSubassembly interface can be called to realize the component loading and the automatic creation of the variable trapezoidal section assembly; call the road model creation API to convert the road area Each target parameter of the variable trapezoidal section assembly in is modified to the target parameter polyline calculated and generated in step (2), and effective offset target parameters and elevation target parameters are assigned to the variable trapezoidal section under each chainage in the road area, such as Figure 8 shows.

Then specify the terrain surface to generate the model; input the material parameters according to the user interface, call the Civil3D style API to dynamically create and modify the road code set style, assign the new style to the road model, and generate a dynamically rendered model.

In addition, by adjusting the input parameters, the model can be updated quickly: when the designed section design parameters are changed, modify the parameter values through the interface, and the program will automatically delete the original model data. At the same time, clear the original calculation data according to the layer set in step (2), generate a new target parameter polyline, and quickly create the changed model.

In summary, in actual operation, the present invention develops a drainage ditch design module based on Civil3D software, integrates functions such as Civil3D route, longitudinal section, component editor, road, etc., and the user interface of secondary development is friendly, and users can design according to their own The idea is to manually input the cross-section parameters of the drainage channel and the corresponding stake number interval, and generate the drainage measure road with one click.

The technical solution provided by the present invention has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (5)

1. A Civil 3D-based long-distance multi-section channel modeling method is characterized by comprising the following steps:

creating a variable trapezoidal section part: summarizing various section forms into a variable trapezoidal section, setting an offset target and an elevation target for key control points of the variable trapezoidal section, parameterizing key control point variables, and creating a corresponding variable trapezoidal section component;

calculating a target parameter multi-segment line: according to the actual condition of the channel to be modeled, laying the section form of each section of channel and the cross section design parameters under the section form along the pile number of the route, and processing the laying information to obtain a target parameter multi-section line, wherein the target parameter multi-section line comprises an offset target line and an elevation target line of a variable trapezoidal section under each pile number;

creating a channel model: and on the basis of the variable trapezoidal section component, creating a road area with the same number of piles as that of the channel to be modeled, correspondingly assigning the data of the target parameter multi-segment line to the road area, carrying out mirroring, and then completing channel modeling according to a conventional process.

2. The method of claim 1, wherein creating a variable trapezoidal section component comprises:

in a Civil3D component editor, channel top width, channel bottom width and channel depth parameters are predefined by taking a channel bottom midpoint as a base point, offset target parameters are set at a channel top right vertex and a channel bottom right vertex, an elevation target parameter is set at the channel top to create a variable trapezoidal section component, and then a corresponding guid code is obtained.

3. The method of claim 1, wherein in the creation of the channel model, based on the guid code of the variable trapezoidal section component, the program background calls a subassemby collection. And then calling a road model creating API, and creating a road area with the same pile number as the channel to be created.

4. The method of claim 1, wherein the determining a target parameter polyline comprises:

performing secondary development based on Civil3D, and setting a visual parameter input interface;

and acquiring layout information input by a user through the visual parameter input interface, calculating positioning points of offset target lines and elevation target lines under different variable trapezoidal sections one by one along the center line of the channel according to the layout information, and generating the target parameter multi-segment lines.

5. The method of claim 3, wherein the layout information includes a start and end post number for each segment of the building and cross-sectional design parameters for the building, wherein:

the design parameters of the cross sections of the rectangular section and the trapezoidal section are as follows: the width of the bottom of the channel, the depth of the channel and the length of a side slope;

the design parameters of the cross section of the inlet transition section are as follows: inlet width and slope;

the design parameters of the cross section of the outlet transition section are as follows: outlet width and slope;

the design parameters of the cross section of the middle transition section are as follows: and taking the section parameters of the former and the latter.

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