A method and system for designing a reinforced soil slope based on BIM

Abstract

The present application relates to geotechnical engineering and BIM information field, especially a kind of reinforced soil slope design method and system based on BIM.Method includes the following steps: the soil slope to be reinforced is cut, obtains several profiles;Establish profile interval on any profile, obtain the reinforcement distribution spacing and reinforcement length in the profile interval;In any elevation in profile interval, make the horizontal plane of infinite space, calculate the intersection line of the horizontal plane and the soil slope to be reinforced, determine the range of reinforcement on horizontal plane according to the reinforcement length and the intersection line, and set reinforcement distribution.The present application proposes a more visual slope profile layout method, generates BIM three-dimensional design model based on profile layout result, realizes the BIM automatic design of reinforced soil slope, so that design is more accurate and efficient.

Description

Technical Field

[0001] This invention relates to the fields of geotechnical engineering and BIM information technology, and in particular to a BIM-based design method and system for reinforced soil slopes. Background Technology

[0002] Currently, the design of reinforced soil slopes mainly adopts the limit equilibrium method. This involves determining the foundation design parameters through a two-dimensional geological profile, then conducting slope stability analysis to determine the required reinforcement strength, distribution range, spacing, and length. Finally, various stability checks are performed (such as anti-sliding stability checks and seismic stability checks). Once these checks are passed, the reinforcement parameters can be used as the actual design parameters. Typically, within a design profile, there are different zones based on the reinforcement spacing (or length), such as... Figure 1 The design schematic diagram of the reinforced soil slope is shown. After the design is completed, the length of the reinforcement used in each section is counted, and the representative lengths of that section are summed to obtain the total amount of reinforcement for the entire reinforced soil slope project.

[0003] Current two-dimensional design methods are based on geological profiles. They can only roughly imagine the areas between the profiles and cannot take into account the influence of slope geometry on reinforcement laying, resulting in a large error between the calculated amount of reinforcement and the final construction result.

[0004] In BIM 3D design, the length and layout of reinforcement materials still need to be calculated and determined. However, 3D calculation is costly and the calculation theory is not yet perfect. Therefore, 2D geological profiles are still used for limit equilibrium analysis and calculation, and then BIM 3D design is carried out based on the calculation results. At present, the design of reinforced soil slopes in BIM is mostly based on slope material rendering, without substantial design and related design methods. Therefore, this paper proposes a BIM-based reinforced soil slope design method, which can automatically perform BIM 3D design based on profile calculation results and count the quantity of reinforcement materials based on the design results. Summary of the Invention

[0005] The present invention relates to a BIM-based design method and system for reinforced soil slopes, which proposes a new method for slope profile layout and generates a BIM three-dimensional design model using the slope layout method, thereby realizing BIM automated design of reinforced soil slopes and making the design more accurate and efficient.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] A BIM-based design method for reinforced soil slopes includes the following steps:

[0008] The reinforced soil slope was cut to obtain several cross sections;

[0009] Establish a section interval on any cross section, and obtain the reinforcement distribution spacing and reinforcement length within the section interval;

[0010] Draw an infinitely large horizontal plane at any elevation within the profile interval, calculate the intersection line between the horizontal plane and the soil slope to be reinforced, determine the reinforcement range on the horizontal plane based on the reinforcement length and the intersection line, and set the reinforcement distribution.

[0011] As a preferred embodiment, an influence zone is set in the area between several cross sections, wherein the spacing and length of the reinforcing bars in the influence zone are the same as those of the closest cross section.

[0012] As a preferred embodiment, the influence range is half the distance between adjacent cross-sections.

[0013] As a preferred embodiment, the plurality of cross-sections are perpendicular to the ground.

[0014] As a preferred embodiment, the range of reinforcement on the horizontal surface includes the range of concave intersection lines and the range of convex intersection lines. The range of reinforcement on the horizontal surface is divided into rectangles and triangles according to the turning points of the lines, and the reinforcement is arranged according to the rectangles and triangles respectively.

[0015] As a preferred embodiment, the steps for arranging the reinforcing bars in the triangle include: calculating the angle bisector at the vertex of the triangle, calculating its rectangular bounding box with the angle bisector as the axis, taking the side of the bounding box rectangle adjacent to the intersection line as the reinforcing bar arrangement side, and arranging the reinforcing bars according to the distance between the start and end points of the arrangement side and the actual width of the reinforcing bars.

[0016] As a preferred option, the required number of reinforcing bars is calculated based on the distance between the start and end points of the arrangement. If an integer number of reinforcing bars are arranged and there is still a remaining distance D... left If D is satisfied left ≥0.5w i w i To determine the spacing between reinforcing bars on a horizontal plane, add one reinforcing bar.

[0017] As a preferred embodiment, the step of arranging the reinforcing bars in the triangle includes traversing all triangular regions, using its base point as the center and the side lengths of the adjacent sides of the base point as the radius to construct a sector-shaped fitting of the triangular regions, thus obtaining a sector-shaped region; if the central angle of the sector-shaped region is... If necessary, the reinforcing bars should be laid directly along the central axis of the sector; otherwise, they should be laid at a central angle of 0.5θ. i Starting from an angle of θ, the sector is divided into multiple circles with central angles of θ. i A small fan-shaped section, with reinforcing bars arranged along the central axis of the fan-shaped section; where θ i It represents the central angle occupied by the reinforcing material in the sector region.

[0018] As a preferred option, after the reinforcement is laid out, the number of horizontal reinforcement bars within the reinforcement range on the horizontal plane is calculated, and then the number of horizontal reinforcement bars is added together to obtain the total amount of reinforcement required for the entire project.

[0019] Based on the same concept, a BIM-based reinforced soil slope design system is also proposed, including at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the method described above.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] This invention proposes a more visual slope profile layout method, which generates a BIM 3D design model based on the profile layout results, realizing BIM automated design of reinforced soil slopes, making the design more accurate and efficient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of reinforced soil slope design in the background art of this invention;

[0023] Figure 2 This is a flowchart of a BIM-based reinforced soil slope design method according to Embodiment 1 of the present invention;

[0024] Figure 3 This is a schematic diagram of the coordinate system for the reinforced soil slope in Embodiment 2 of the present invention;

[0025] Figure 4 This is a schematic diagram of the influence zone of the reinforced soil slope profile in Embodiment 2 of the present invention;

[0026] Figure 5 This is a schematic diagram of the slope intersection line in Embodiment 2 of the present invention;

[0027] Figure 6 This is a schematic diagram of the offset of the (concave) slope intersection line in Embodiment 2 of the present invention;

[0028] Figure 7 This is a schematic diagram of the offset of the (convex) slope intersection line in Embodiment 2 of the present invention;

[0029] Figure 8 This is a schematic diagram of the slope reinforcement arrangement in Embodiment 2 of the present invention;

[0030] Figure 9 This is a schematic diagram of the calculation of the rectangular bounding box of the triangular region in Embodiment 2 of the present invention;

[0031] Figure 10 This is a schematic diagram of the reinforcement arrangement in the triangular region in Embodiment 2 of the present invention;

[0032] Figure 11 This is a schematic diagram of the triangular region sector division in Embodiment 2 of the present invention;

[0033] Figure 12 This is a schematic diagram of the reinforcement arrangement in the triangular region in Embodiment 2 of the present invention. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0035] Example 1

[0036] A BIM-based design method for reinforced soil slopes, flowchart as follows: Figure 2 As shown, it includes the following steps:

[0037] The reinforced soil slope was cut to obtain several cross sections;

[0038] Establish a section interval on any cross section, and obtain the reinforcement distribution spacing and reinforcement length within the section interval;

[0039] Draw an infinitely large horizontal plane at any elevation within the profile interval, calculate the intersection line between the horizontal plane and the soil slope to be reinforced, determine the reinforcement range on the horizontal plane based on the reinforcement length and the intersection line, and set the reinforcement distribution.

[0040] As a preferred embodiment, an influence zone is set in the area between several cross sections, wherein the spacing and length of the reinforcing bars in the influence zone are the same as those of the closest cross section.

[0041] As a preferred embodiment, the influence range is half the distance between adjacent cross-sections.

[0042] As a preferred embodiment, the plurality of cross-sections are perpendicular to the ground.

[0043] As a preferred embodiment, the range of reinforcement on the horizontal surface includes the range of concave intersection lines and the range of convex intersection lines. The range of reinforcement on the horizontal surface is divided into rectangles and triangles according to the turning points of the lines, and the reinforcement is arranged according to the rectangles and triangles respectively.

[0044] As a preferred embodiment, the steps for arranging the reinforcing bars in the triangle include: calculating the angle bisector at the vertex of the triangle, calculating its rectangular bounding box with the angle bisector as the axis, taking the side of the bounding box rectangle adjacent to the intersection line as the reinforcing bar arrangement side, and arranging the reinforcing bars according to the distance between the start and end points of the arrangement side and the actual width of the reinforcing bars.

[0045] As a preferred option, the required number of reinforcing bars is calculated based on the distance between the start and end points of the arrangement. If an integer number of reinforcing bars are arranged and there is still a remaining distance D... left If D is satisfied left ≥0.5w i w i To determine the spacing between reinforcing bars on a horizontal plane, add one reinforcing bar.

[0046] As a preferred option, after the reinforcement is laid out, the number of horizontal reinforcement bars within the reinforcement range on the horizontal plane is calculated, and then the number of horizontal reinforcement bars is added together to obtain the total amount of reinforcement required for the entire project.

[0047] A BIM-based reinforced soil slope design system includes at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform any of the methods described above.

[0048] A medium having a computer program stored thereon, which, when executed by a processor, implements the method described in any of the preceding claims.

[0049] Example 2

[0050] Example 2 provides a specific implementation method for BIM-based reinforced soil slope design:

[0051] 1. Extract the profile calculation results

[0052] In the BIM model, select the slope surface that needs reinforcement (usually a spatial composite surface composed of multiple planes). Establish a local coordinate system based on the starting point of the engineering design: use any slope direction line (horizontal line) as the X-axis (curve axis), with the starting point of the project as the origin of the X-axis, and the direction towards the end point of the project as the positive direction; use the gravity direction as the Y-axis, with the actual elevation origin as the origin of the Y-axis, and vertically upward as the positive direction of the Y-axis. Figure 3 Schematic diagram of the coordinate system for reinforced soil slope.

[0053] Extract all cross-section calculation results, including: cross-section location (X coordinate in the local coordinate system), Y coordinate (elevation) of the start and end points of each reinforced section in the cross-section, reinforcement spacing and reinforcement length.

[0054] For any cross section S i Represent all the reinforced zones distributed on its slope as Y-coordinate intervals, such as (Y i1 ,Y i2 This is used to establish a correspondence between the spacing and length of the reinforcing bars in the section and the corresponding relationship, so that the spacing and length of the reinforcing bars in the section can be directly obtained through the section of the cross-section.

[0055] 2. Calculate the influence range of the profile.

[0056] Design calculations are performed based on two-dimensional cross-sections. The area between cross-sections is referenced to the nearest calculated cross-section; that is, the area between cross-sections is evenly distributed to the two adjacent cross-sections. The area distributed to the cross-sections is the influence area of ​​that cross-section. Figure 4 The schematic diagram of the influence zone of the reinforced soil slope profile is shown.

[0057] Sort all profiles in ascending order of their X-coordinate. Then iterate through all profiles and calculate the influence range of each profile. For the current profile S... i :

[0058] If it is the first calculated profile, then the left value of its influence range is the project starting point X. start Otherwise, it is the previous section S. i-1 Position X i-1 With current profile position X i The midpoint, i.e., 0.5·(X) i-1 +X i );

[0059] If it is the last calculated profile, then the right value of its influence range is the project endpoint X. end Otherwise, it is the next section S. i+1 Position X i+1 With current profile position X i The midpoint, i.e., 0.5·(X) i +X i+1 );

[0060] After traversal, multiple profile influence intervals can be obtained and stored in the influence interval list. At the same time, the correspondence between the calculated profile and the influence interval is established.

[0061] 3. Slope reinforcement layout

[0062] To facilitate construction and installation, during design calculations, each layer of reinforcing material in each section is usually placed at the same design elevation.

[0063] Traverse all calculation profiles. For a given calculation profile, traverse its reinforcement partition intervals. For a given partition interval, the reinforcement distribution spacing can be obtained based on the start and end elevations of the interval. Therefore, calculate all the calculation elevations of the interval and store them in the elevation distribution list.

[0064] After traversing all calculated profiles and all reinforcement intervals within the profiles, the elevation values ​​in the elevation distribution list are sorted from smallest to largest. At this point, the elevation distribution list stores all possible elevation locations for laying reinforcement.

[0065] Iterate through all elevation values ​​in the elevation distribution list, and for a given elevation value E... i :

[0066] (1) Draw an elevation E i The infinitely large horizontal plane P i Calculate the intersection line L between it and the slope surface of the engineering slope. i ;

[0067] (2) Traverse all calculated profiles, extract the coordinate intervals of all reinforced zones, and determine the current elevation value E. i The section is located and the corresponding reinforcement length is obtained. At the same time, a temporary correspondence is established between the profile and the reinforcement length (only for reinforcement layout under the current elevation).

[0068] (3) Take the maximum value d of all the reinforcement lengths included in the current elevation. i , intersecting line L i Horizontal offset d inwards from the slope i Distance, to obtain the intersection line L ′ i ,like Figure 5 The diagram shows the intersection of the slopes.

[0069] (4) Considering that the slope shape may be arbitrary, the intersection line L i It can also be of any shape, but it can basically be generalized as a broken line. The intersection of broken line slopes is mainly divided into two categories: concave type (such as...). Figure 6 ) and convex type (such as Figure 7 ).

[0070] (5) Simultaneously traverse the intersection line L i and the intersection line L′ i All vertices (vertices are local coordinates), and perpendicular lines are drawn from each vertex to the opposite edge:

[0071] If L i Upper vertex v i If it is a concave point, then through L i Upper vertex v i Towards the intersection line L′ i Draw a perpendicular line to the vertex v′ i Adjacent sides on both sides, such as Figure 6 (Concave) Slope intersection line offset diagram.

[0072] If L i Upper vertex v i If it is an externally convex point, then it passes through L′. i Corresponding vertex v′ i Towards intersection line L i Draw a perpendicular line to vertex v. i Adjacent sides on both sides, such as Figure 7Schematic diagram of the offset of the intersection line of the (convex) slope.

[0073] At this time, the intersection line L i and the intersection line L′ i The resulting strip is divided into multiple rectangular regions, leaving several triangular regions. The intersection line L of these rectangular regions is recorded. i The coordinates of the start and end points on the sides, as well as the base point of the triangular region (the common point of two adjacent rectangles) and other vertices.

[0074] (6) Traverse all rectangles, starting from the coordinates of the rectangle's starting point and placing the reinforcing bars along its ending point: based on the distance D between the starting and ending points. i and the actual spacing width w of the reinforcing bars i The required number of reinforcing bars can be calculated. Usually, after arranging an integer number of reinforcing bars, there will still be a certain distance D remaining. left Therefore, if the remaining distance satisfies D left ≥0.5w i If a reinforcement bar is added, then one more reinforcement bar is added. Based on the X-coordinate of the placement point and the aforementioned correspondence between the influence zone and the cross-section, the corresponding calculated cross-section can be obtained. And based on the aforementioned temporary correspondence between the cross-section and the reinforcement length, the required length of the reinforcement bar at the placement location can be obtained. The reinforcement bars are then laid out according to the number and length of the reinforcement bars, such as... Figure 8 The diagram shows the arrangement of reinforcement materials on the slope. In the BIM model, the actual reinforcement materials can be simulated using planar shapes of the same size combined with material rendering.

[0075] (7) For the triangular region, there are two processing methods:

[0076] Method 1: Traverse all triangular regions, calculate the angle bisector at each base point, and calculate the bounding box of the rectangle using the angle bisector as the axis, such as... Figure 9 Take the bounding box rectangle and its intersection line L. i Adjacent edges are used as reinforcement arrangement edges. The reinforcement is arranged according to the distance between the start and end points of the arrangement edges and the actual width of the reinforcement. The specific arrangement method is the same as the rectangular area processing method in (6). The layout result is as follows: Figure 10 .

[0077] Method 2: Traverse all triangular regions, using the base point as the center, and the side length r of the sides adjacent to the base point. i Construct a sector to fit the triangular region with radius . The central angle of the sector is . The width of the reinforcing bar is w i Then the length is r i The central angle occupied by the reinforcing material in this sector is θ. i =180w i / πr i If the central angle of the sector itself... If the reinforcement is placed directly along the central axis of the sector, its length is determined in the same way as that of the rectangular area; otherwise, the central angle is 0.5θ. i Starting from an angle of θ, the sector is divided into multiple circles with central angles of θ. i Small fan-shaped, such as Figure 11 The diagram illustrates the sector-shaped division of the triangular region. The central axis of the reinforcing bars is laid out along the dividing line, and its length is determined in the same way as in the rectangular region. If the length ≥ r... i Then adjust the deployment length to r. i Otherwise, lay out the sections according to the actual length, and finally drive anchors into the center to make the length r... i The reinforcement is fixed in place, making it difficult for the overlapping reinforcement to slip, and the layout result is as follows: Figure 12 The diagram shows the reinforcement arrangement in the triangular region. The adjustment of the reinforcement length is based on the consideration that length ≥ r. i The reinforcing bars overlap significantly and are prone to relative slippage, so they are extended to the center and fixed with anchors.

[0078] To facilitate the counting of reinforcing steel components, the elevation and length of each component are recorded during installation. Finally, the quantity of reinforcing steel at the same design elevation and the total required quantity for the entire project can be tallied by elevation.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A BIM-based design method for reinforced soil slopes, characterized in that, Includes the following steps: The reinforced soil slope was cut to obtain several cross sections; Establish a section interval on any cross section, and obtain the reinforcement distribution spacing and reinforcement length within the section interval; At any elevation within the profile interval, construct an infinitely large horizontal plane, calculate the intersection of the horizontal plane and the soil slope to be reinforced, determine the reinforcement range on the horizontal plane based on the reinforcement length and the intersection line, and set the reinforcement distribution. The area of ​​reinforcement on the horizontal plane includes the concave intersection line range and the convex intersection line range. The area of ​​reinforcement on the horizontal plane is divided into rectangles and triangles according to the turning points of the lines, and the reinforcement is arranged according to the rectangles and triangles respectively. The steps for arranging the reinforcing bars in the triangle include traversing all triangular regions, using its base point as the center and the side lengths of the adjacent sides as the radius to construct a sector-shaped fitting of the triangular regions, thus obtaining a sector-shaped region; if the central angle of the sector-shaped region is... If the reinforcement is too large, then the reinforcement should be laid directly along the central axis of the sector; otherwise, the reinforcement should be laid at the central angle. Starting at an angle, the sector is divided into multiple circles with central angles of... Small fan-shaped sections, with reinforcing bars arranged along the central axis of the fan; among them... It represents the central angle occupied by the reinforcing material in the sector region.

2. The BIM-based reinforced soil slope design method as described in claim 1, characterized in that, An influence zone is set in the area between several cross sections, wherein the spacing and length of the reinforcing bars in the influence zone are the same as those of the closest cross section.

3. The BIM-based reinforced soil slope design method as described in claim 2, characterized in that, The affected area is half the distance between adjacent sections.

4. The BIM-based reinforced soil slope design method as described in claim 1, characterized in that, The aforementioned cross-sections are perpendicular to the ground.

5. The BIM-based reinforced soil slope design method as described in claim 1, characterized in that, The steps for arranging the reinforcing bars in the triangle include: calculating the angle bisector at the vertex of the triangle, calculating its rectangular bounding box with the angle bisector as the axis, taking the side of the bounding box rectangle adjacent to the intersection line as the reinforcing bar arrangement side, and arranging the reinforcing bars according to the distance between the start and end points of the arrangement side and the actual width of the reinforcing bars.

6. The BIM-based reinforced soil slope design method as described in claim 5, characterized in that, Calculate the required number of reinforcing bars based on the distance between the start and end points of the arrangement. If there is still space remaining after arranging an integer number of reinforcing bars... If satisfied , To determine the spacing between reinforcing bars on a horizontal plane, add one reinforcing bar.

7. The BIM-based reinforced soil slope design method as described in claim 1, characterized in that, After the reinforcement is laid out, the number of horizontal reinforcement bars within the reinforcement range on the horizontal plane is calculated. Then, the number of horizontal reinforcement bars is added together to obtain the total amount of reinforcement required for the entire project.

8. A BIM-based reinforced soil slope design system, characterized in that, The method includes at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 7.

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