Automatic arrangement method of hollow slab bridge based on Revit

Abstract

The invention discloses an automatic arrangement method for hollow slab bridges based on Revit, and belongs to the technical field of hollow slab bridge information model construction.The automatic arrangement method comprises the following steps that S1, a starting abutment and a terminating abutment of a to-be-arranged hollow slab bridge are selected in a Revit space; s2, calculating an arrangement area of hollow slabs in the hollow slab bridge according to the spatial positions and parameters of the starting abutment and the ending abutment, and determining the sizes and shapes of the hollow slabs; s3, the number of the hollow slabs and the styles of the side plates are determined according to the bridge deck width of the hollow slab bridge and the widths of the hollow slabs, and an arrangement set of the hollow slabs is calculated according to the arrangement sequence of the side plates, the middle plates and the side plates; s4, calculating an arrangement set of surface layers and supports of the hollow slab bridge; and S5, according to the information of the arranged hollow slabs, the surface layers and the supports, hollow slab notch information is calculated, and the starting abutment and the ending abutment at the two ends are sheared with the notch information as the reference. When the hollow slab bridge is arranged, manual subjective intention judgment errors are reduced, the design efficiency is improved, and rework is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of hollow slab bridge information model construction, and specifically relates to an automatic layout method of hollow slab bridges based on Revit. Background Art

[0002] Hollow slab bridge is a structural form widely used in highway bridge projects. It is mainly divided into two types: reinforced concrete hollow slab and prestressed concrete hollow slab. Reinforced concrete hollow slab bridge is suitable for bridges with a span of no more than 10 meters, while prestressed concrete hollow slab bridge is suitable for bridges with a span of no more than 20 meters.

[0003] The hollow slab bridge is characterized by simple structure, clear force, convenient construction and mature technology. It usually adopts a multi-plate structure with relatively low beam height and a cavity in the middle to reduce the deadweight. In the transverse direction of the bridge, the hollow slabs are connected by hinged joints, and a cast-in-place integral layer is set on the top of the slab. This bridge structure is suitable for bridges with a span of 6 to 20 meters, especially widely used in bridges with a pier height of less than 15 meters.

[0004] The advantages of prefabricated hollow slabs include: small beam height, which can reduce the height of roadbed fill and save project cost; the slabs are arranged closely, with neat appearance and good landscape effect; the force mechanism is clear, and the structure and bundle are simple; the construction technology is mature, and it can be prefabricated in a factory, which saves cost and is easy to ensure construction quality; the beam and slab are small in size and light in weight, which is easy to transport and install; and it has good adaptability to bridges with different slopes.

[0005] Before the construction of hollow slab bridges, the layout of hollow slabs needs to be determined first. With the continuous development and improvement of BIM technology, the design of hollow slab bridges will also shift from two-dimensional to three-dimensional. Hollow slabs are spatial connection components. Manually arranging hollow slab bridges in Revit makes it difficult to locate the spatial position. There are many auxiliary components of hollow slab bridges, which results in low layout efficiency and cumbersome work. Therefore, it is difficult to give a reasonable and efficient solution through manual arrangement. Summary of the invention

[0006] In order to solve the problems of low efficiency and cumbersome work in the prior art of manually arranging hollow slabs of hollow slab bridges using BIM technology, the present invention provides an automatic arrangement method for hollow slab bridges based on Revit, which can automatically arrange the hollow slabs in the hollow slab bridge when using Revit software.

[0007] The technical solution adopted by the automatic arrangement method of a hollow slab bridge based on Revit of the present invention is:

[0008] An automatic layout method for hollow slab bridges based on Revit, comprising:

[0009] S1. Select the starting pier and ending pier of the hollow slab bridge to be arranged in the Revit space;

[0010] S2. Calculate the arrangement area of ​​the hollow slab in the hollow slab bridge according to the spatial positions and parameters of the starting pier and the ending pier, and determine the size and shape of the hollow slab;

[0011] S3, determining the number of hollow slabs and the style of side slabs according to the width of the bridge deck of the hollow slab bridge and the width of the hollow slab, and calculating the arrangement set of the hollow slabs according to the arrangement order of the side slabs, the middle slabs, and the side slabs;

[0012] S4. Calculate the arrangement set of the surface layer and the bearings of the hollow slab bridge;

[0013] S5. Calculate the gap information of the hollow slab according to the information of the arranged hollow slab, surface layer and support, and cut the starting pier and the ending pier at both ends based on the gap information.

[0014] A further improvement of the technical solution of the present invention is that the principle for selecting the starting pier and the ending pier of the hollow slab bridge to be arranged in step S1 is:

[0015] After selecting the starting pier and the ending pier, define the starting and ending positions from left to right and from bottom to top.

[0016] A further improvement of the above technical solution of the present invention is that: the arrangement area of ​​the hollow slabs in step S2 is determined according to the bridge deck width of the hollow slab bridge, the bridge deck angle of the hollow slab bridge and the margins of the hollow slabs in the hollow slab bridge from the starting pier in the X and Y directions; wherein, the bridge deck width of the hollow slab bridge is 9m, the bridge deck angle of the hollow slab bridge is the angle between the line connecting the starting pier base point and the ending pier base point and the horizontal X direction, the X margin is the distance between the bridge deck center of the hollow slab bridge and the starting pier base point in the X direction, and the Y margin is the distance between the bridge deck center of the hollow slab bridge and the starting pier base point in the Y direction.

[0017] A further improvement of the above technical solution of the present invention lies in that: the size and shape of the hollow slab in step S2 include the length, width and shape type of the hollow slab; wherein, the length of the hollow slab is the spatial distance between the starting pier and the ending pier + the length of the overlapping ends of the hollow slab with the starting pier and the ending pier respectively, and the width of the hollow slab is three prefabricated widths of 1m, 1.25m, and 1.5m. The hollow slabs located at both ends of the hollow slab bridge are side slab types, and the hollow slab located in the middle of the hollow slab bridge is a middle slab type.

[0018] A further improvement of the technical solution of the present invention is that the method for determining the number of hollow slabs and the style of side plates in step S3 is: the bridge deck width of the hollow slab bridge is divided by the width of the hollow slab, the result N is the number of hollow slabs, and if the remainder Lm is greater than zero, the side plates of the hollow slab are cantilever type plates, and the cantilever length is Lm / 2; if Lm is zero, the side plates of the hollow slab are ordinary side plate types.

[0019] A further improvement of the above technical solution of the present invention is that the method for calculating the arrangement set of hollow slabs in step S3 is:

[0020] S3.1. Calculate the coordinate point Point of the center line of the hollow slab bridge based on the base point coordinates of the starting pier plus the arrangement parameters X margin and Y margin;

[0021] S3.2, traverse the number of hollow slabs N, when N is 1, determine the offset coordinate PointOff1 according to the offset length LoffC and the offset angle Aoff, and Point+PointOff1 is the coordinate position of the first hollow slab side plate;

[0022] S3.3, continue to traverse other sections of n hollow slabs, the offset length Loff is the last offset minus the width of the hollow slab, the offset angle Aoff remains unchanged, calculate the offset coordinate PointOffn, Point+PointOffn is the coordinate position of the n hollow slab;

[0023] S3.4. To ensure that the side plates of the hollow slab are on the outer side, when traversing to the last section N, the hollow slab needs to be rotated 180° along the center.

[0024] A further improvement of the above technical solution of the present invention is that the method for calculating the arrangement set of the surface layer and the bearings of the hollow slab bridge in step S4 is:

[0025] S4.1. The surface layer is flush with the starting pier surface, and the surface layer layout area is the entire layout area of ​​the hollow slab, that is, the width of the hollow slab area * the length of the hollow slab;

[0026] S4.2. After each hollow slab is arranged, four supports shall be arranged at the bottom of each hollow slab, and each support shall be located 100 mm away from the edge of the hollow slab.

[0027] A further improvement of the above technical solution of the present invention is that the method for calculating the hollow slab gap information in step S5 is:

[0028] S5.1. Calculate the height of the notch; the height of the notch is the height of the hollow slab + the thickness of the surface layer + the height of the support;

[0029] S5.2. The gap is centered on the center of the hollow slab arrangement area. The width of the gap is 20 mm larger than the width of the bridge deck on both sides. The length of the gap is 30 mm longer than the distance the hollow slab extends into the corresponding pier.

[0030] Due to the adoption of the above technical solution, the technical advances achieved by the present invention include:

[0031] The present invention calculates the arrangement area of ​​the hollow slab, the size and shape of the hollow slab and other parameters by accurately analyzing the spatial position of the pier and the component parameters. This method automatically determines the arrangement interval and size by calculating the initial value method, reduces human subjective intention judgment errors, improves design efficiency and reduces rework.

[0032] The hollow slab arrangement strategy of the present invention realizes fast and accurate arrangement of the hollow slab by writing an automated arrangement algorithm which takes into account the size, shape, boundaries and constraints of the arrangement area of ​​the hollow slab.

[0033] Finally, the present invention calculates the gap information and cuts the corresponding piers at both ends to make the three-dimensional display effect more in line with actual engineering needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flow chart of an automatic arrangement method of a hollow slab bridge based on Revit of the present invention;

[0035] Figure 2 It is a flow chart of calculating the arrangement set of hollow slabs in step S3 of an automatic arrangement method of a hollow slab bridge based on Revit of the present invention;

[0036] Figure 3 It is a schematic diagram of the cross-sectional structure of a hollow slab bridge according to an automatic arrangement method of a hollow slab bridge based on Revit of the present invention.

[0037] In the attached figure: 1, surface layer; 2, side plate; 3, middle plate; 4, support. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. In the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0039] First reference Figure 1 It can be seen that the steps of the automatic arrangement method of the hollow slab bridge based on Revit of the present invention are:

[0040] S1. Select two pier components of the hollow slab bridge to be arranged in the Revit space. The two pier components are the starting pier and the ending pier, and the hollow slab bridge needs to be arranged between the starting pier and the ending pier.

[0041] Specifically, after selecting the starting pier and the ending pier, the starting and ending positions of the hollow slab bridge are defined from left to right and from bottom to top, that is, the pier with the smaller spatial coordinate X is the starting pier. If the X coordinates are the same, the starting pier is the pier with the smaller Y.

[0042] For example: Select two piers in Revit, the following units are all m, pier 1 coordinates A (0, 10, 0), pier 2 coordinates B (40, 12, 0), where the size of pier 1 is read as 12×12, the size of pier 2 is 12×14, the surface layer height is set to 0.1, the hollow slab height is 0.5, and the support height is 0.1:

[0043] Pier 1 is defined as the starting pier and Pier 2 is defined as the ending pier based on the coordinate principle from left to right and from bottom to top.

[0044] In the present invention, the user can also specify the starting pier and the ending pier according to the requirements.

[0045] The hollow slab bridge in the present invention can be arranged between the starting pier and the ending pier, or between other components. Where the hollow slab bridge is arranged can be adjusted according to actual needs.

[0046] S2. Determine the arrangement parameters of the hollow slab bridge according to the starting pier and the ending pier of the hollow slab bridge to be arranged. Specifically, firstly, according to the spatial position and specific parameters of the starting pier and the ending pier selected in step S1, calculate the arrangement area of ​​the hollow slab of the hollow slab bridge, and determine the size and shape of the hollow slab at the same time.

[0047] The arrangement area of ​​the above hollow slabs is determined according to the bridge deck width of the hollow slab bridge, the bridge deck angle of the hollow slab bridge, and the margins of the hollow slabs in the hollow slab bridge from the starting pier in the X and Y directions.

[0048] Specifically, the initial default width of the bridge deck of the hollow slab bridge can be set to 9m. The bridge deck angle of the hollow slab bridge is the angle between the line connecting the starting pier base point and the ending pier base point and the horizontal X direction. The X margin is the distance between the bridge deck center of the hollow slab bridge and the starting pier base point in the X direction. The Y margin is the distance between the bridge deck center of the hollow slab bridge and the starting pier base point in the Y direction, which is generally the length and width of the starting pier minus the overlap length (the default value is 300mm) or half of the length and width of the starting pier.

[0049] Meanwhile, the size and shape of the hollow slab include the length, width and shape type of the hollow slab.

[0050] Specifically, the length of the hollow slab is the spatial distance between the starting pier and the ending pier + the length of the overlapping ends of the hollow slab with the starting pier and the ending pier respectively. The default length value of the overlapping ends of the hollow slab with the starting pier and the ending pier is 300mm*2. The width of the hollow slab is prefabricated width of 1m, 1.25m, and 1.5m. The types of hollow slabs are divided into two types: side slab 2 and middle slab 3. The hollow slabs located at both ends of the hollow slab bridge are side slab 2 type, and the hollow slab located in the middle of the hollow slab bridge is middle slab 3 type.

[0051] For example: to set the initial layout area, the bridge deck width of the hollow slab bridge can be defaulted to 9, and the angle is tan-(2 / 40) = 3.18 degrees, that is, according to the angle between the coordinates AB and the X-axis, the X margin is 8.7, and the Y margin is 6. The data set here is the general initial value set by the system, and the designer can also input the setting through the interface according to the needs.

[0052] The size and shape of the hollow slab are determined by the side panels, and the length of the hollow slab is: The width of the hollow slab can be selected as 1.25, 9 / 1.25=7 plus 0.25, so 7 hollow slabs need to be arranged, and the cantilever length of the cantilever side slabs at both ends is 0.25 / 2=0.125.

[0053] S3. Determine the number of hollow slabs and the style of side slabs 2 according to the width of the bridge deck of the hollow slab bridge and the width of the hollow slabs, and calculate the arrangement set of hollow slabs according to the arrangement order of side slabs 2, middle slabs 3, and side slabs 2.

[0054] Specifically, the above method for determining the number of hollow slabs and the style of the side plate 2 is: the bridge deck width of the hollow slab bridge is divided by the width of the hollow slab, the result N is the number of hollow slabs, and if the remainder Lm is greater than zero, the hollow slab side plate 2 is a cantilever type plate, and the cantilever length is Lm / 2; if Lm is zero, the hollow slab side plate 2 is an ordinary side plate 2 type.

[0055] At the same time according to Figure 2 It can be seen that the above method steps for calculating the arrangement set of hollow slabs are:

[0056] S3.1. Calculate the coordinate point Point of the center line of the hollow slab bridge based on the base point coordinates of the starting pier plus the arrangement parameters X margin and Y margin;

[0057] S3.2. Traverse the number of hollow slabs N. When N is 1, determine the offset coordinate PointOff1 according to the offset length LoffC: (bridge width - Lm) / 2 and the offset angle Aoff: (bridge angle - 90 degrees). Point+PointOff1 is the coordinate position of the first hollow slab side slab 2.

[0058] S3.3, continue to traverse other sections of n hollow slabs, the offset length Loff is the last offset minus the width of the hollow slab, the offset angle Aoff remains unchanged, calculate the offset coordinate PointOffn, Point+PointOffn is the coordinate position of the n hollow slab;

[0059] S3.4. To ensure that the side plate 2 of the hollow slab is on the outer side, when traversing to the last section N, the hollow slab needs to be rotated 180 degrees along the center.

[0060] For example: arrangement set of hollow slabs: calculate the center point coordinates Point of the hollow slab bridge as (8.7+0, 10+6, -0.1) = (8.7, 16, -0.1), the offset of hollow slab 1 Loff = 7*1.25 / 2 = 4.375, the offset angle is -90, the offset coordinates PointOff1 (0, -4.375, 0), calculate the first hollow slab coordinates PointOff1 + Point (8.7, 11.625, -0.1), and so on. The second offset distance 4.375-1.25 = 3.125 is calculated in the same way, and the last cantilever side plate is rotated 180 degrees to ensure that the side plate is in the extension.

[0061] according to Figure 3 It can be seen that the hollow slab bridge in the present invention is arranged into three parts from top to bottom, namely the surface layer 1, the hollow slab, and the support 4. The hollow slab is the main component, and the surface layer 1 and the support 4 are the auxiliary components.

[0062] S4. Calculate the arrangement set of the surface layer 1 and the bearing 4 of the hollow slab bridge.

[0063] Specifically, the following steps are included:

[0064] S4.1. The surface layer 1 is flush with the pier surface. The layout area of ​​the surface layer 1 is the entire layout area of ​​the hollow slab, that is, the width of the hollow slab area * the length of the hollow slab;

[0065] S4.2. After each hollow slab is arranged, four supports 4 need to be arranged at the bottom of each hollow slab, and each support 4 is located 100 mm away from the edge of the hollow slab.

[0066] For example: the surface layer 1 and support 4 of the hollow slab bridge, the size of the surface layer is 9*30.66, the coordinates of the lower left point are (8.7+0, 10+(12-9) / 2, 0) = (8.7, 11.5, 0), the coordinates of one of the supports of the hollow slab 1 (4.325, 16, -0.1) are (8.7-0.1, 11.625-0.1, -0.1-0.5) = (8.6, 11.525, -0.6), and so on for the coordinates of other supports.

[0067] S5. Calculate the gap information of the hollow slab according to the information of the arranged hollow slab, surface layer 1 and support 4, and cut the starting pier and the ending pier at both ends based on the gap information.

[0068] Specifically, the following steps are included:

[0069] S5.1. Calculate the height of the notch; the height of the notch is the height of the hollow slab + the thickness of the surface layer 1 + the height of the support 4;

[0070] S5.2. The gap is centered on the center of the hollow slab arrangement area. The width of the gap is 20 mm larger than the width of the bridge deck on both sides. The length of the gap is 30 mm longer than the distance the hollow slab extends into the corresponding pier.

[0071] For example: Gap information: Gap height is 0.1+0.5+0.1=0.7, and gap size is (9+0.02*2)*(30.66+0.03*2)=277.71.

[0072] In the above embodiment, the present invention provides an automatic arrangement method for hollow slab bridges based on Revit, comprising the following steps: S1, selecting the starting pier and the ending pier of the hollow slab bridge to be arranged in the Revit space; S2, calculating the arrangement area of ​​the hollow slabs in the hollow slab bridge according to the spatial position and parameters of the starting pier and the ending pier, and determining the size and shape of the hollow slabs; S3, determining the number of hollow slabs and the style of the side plates according to the bridge deck width of the hollow slab bridge and the width of the hollow slabs, and calculating the arrangement set of the hollow slabs according to the arrangement order of the side plates, middle plates, and side plates; S4, calculating the arrangement set of the surface layer and the support of the hollow slab bridge; S5, calculating the hollow slab gap information according to the information of the arranged hollow slabs, surface layers and supports, and cutting the starting pier and the ending pier at both ends based on the gap information. The present invention calculates the arrangement area of ​​the hollow slab, the size and shape of the hollow slab and other parameters by accurately analyzing the spatial position of the pier and the component parameters. This method automatically determines the arrangement interval and size by calculating the initial value method, reduces human subjective intention judgment errors, improves design efficiency and reduces rework.

[0073] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. An automatic layout method for hollow slab bridges based on Revit, characterized by: S1. Select the starting pier and ending pier of the hollow slab bridge to be arranged in the Revit space; S2. Calculate the arrangement area of ​​the hollow slab in the hollow slab bridge according to the spatial positions and parameters of the starting pier and the ending pier, and determine the size and shape of the hollow slab; S3, determining the number of hollow slabs and the style of the side slabs (2) according to the width of the bridge deck of the hollow slab bridge and the width of the hollow slabs, and calculating the arrangement set of the hollow slabs according to the arrangement sequence of the side slabs (2), the middle slabs (3), and the side slabs (2); S4, calculating the arrangement set of the surface layer (1) and the bearing (4) of the hollow slab bridge; S5. Calculate the gap information of the hollow slab according to the information of the arranged hollow slab, surface layer (1) and support (4), and cut the starting pier and the ending pier at both ends based on the gap information.

2. The automatic arrangement method of hollow slab bridge based on Revit according to claim 1, characterized in that: The principle for selecting the starting pier and the ending pier of the hollow slab bridge to be arranged in step S1 is: After selecting the starting pier and the ending pier, define the starting and ending positions from left to right and from bottom to top.

3. The automatic arrangement method of hollow slab bridge based on Revit according to claim 1 is characterized in that: In step S2, the arrangement area of ​​the hollow slab is determined according to the bridge deck width of the hollow slab bridge, the bridge deck angle of the hollow slab bridge and the margins of the hollow slabs in the hollow slab bridge from the starting pier in the X and Y directions; wherein, the bridge deck width of the hollow slab bridge is 9m, the bridge deck angle of the hollow slab bridge is the angle between the line connecting the starting pier base point and the ending pier base point and the horizontal X direction, the X margin is the distance between the bridge deck center of the hollow slab bridge and the starting pier base point in the X direction, and the Y margin is the distance between the bridge deck center of the hollow slab bridge and the starting pier base point in the Y direction.

4. The automatic arrangement method of hollow slab bridge based on Revit according to claim 1 is characterized in that: The size and shape of the hollow slab in step S2 include the length, width and shape type of the hollow slab; wherein the length of the hollow slab is the spatial distance between the starting pier and the ending pier + the length of the lap joint ends of the hollow slab with the starting pier and the ending pier respectively; the width of the hollow slab is prefabricated in three widths: 1m, 1.25m and 1.5m; the hollow slabs at both ends of the hollow slab bridge are of the side slab (2) type, and the hollow slabs in the middle of the hollow slab bridge are of the middle slab (3) type.

5. The automatic arrangement method of hollow slab bridge based on Revit according to claim 1 is characterized by: The method for determining the number of hollow slabs and the style of the side slabs (2) in step S3 is: the bridge deck width of the hollow slab bridge is divided by the width of the hollow slab, the result N is the number of hollow slabs, and if the remainder Lm is greater than zero, the hollow slab side slab (2) is a cantilever type slab, and the cantilever length is Lm / 2; if Lm is zero, the hollow slab side slab (2) is a common side slab (2) type.

6. The automatic arrangement method of hollow slab bridge based on Revit according to claim 1, characterized in that: The method for calculating the arrangement set of hollow slabs in step S3 is: S3.

1. Calculate the coordinate point Point of the center line of the hollow slab bridge based on the base point coordinates of the starting pier plus the arrangement parameters X margin and Y margin; S3.2, traverse the number of hollow slabs N, when N is 1, determine the offset coordinate PointOff1 according to the offset length LoffC and the offset angle Aoff, Point+PointOff1 is the coordinate position of the first hollow slab side plate (2); S3.3, continue to traverse the other sections of n hollow slabs, the offset length Loff is the last offset minus the width of the hollow slab, the offset angle Aoff remains unchanged, calculate the offset coordinate PointOffn, Point+PointOffn is the coordinate position of the n hollow slab; S3.

4. To ensure that the side plate (2) of the hollow slab is on the outer side, when traversing to the last section N, the hollow slab needs to be rotated 180° along the center.

7. The automatic arrangement method of hollow slab bridge based on Revit according to claim 1 is characterized by: The method for calculating the arrangement set of the surface layer (1) and the support (4) of the hollow slab bridge in step S4 is: S4.1, the surface layer (1) is flush with the starting pier surface, and the layout area of ​​the surface layer (1) is the entire layout area of ​​the hollow slab, that is, the width of the hollow slab area * the length of the hollow slab; S4.

2. After each hollow slab is arranged, four supports (4) need to be arranged at the bottom of each hollow slab, and each support (4) is located at a distance of 100 mm from the edge of the hollow slab.

8. The automatic arrangement method of hollow slab bridge based on Revit according to claim 1, characterized in that: The method for calculating the hollow slab gap information in step S5 is: S5.

1. Calculate the height of the notch; the height of the notch is the height of the hollow slab + the thickness of the surface layer (1) + the height of the support (4); S5.

2. The gap is centered on the center of the hollow slab arrangement area. The width of the gap is 20 mm larger than the width of the bridge deck on both sides. The length of the gap is 30 mm longer than the distance the hollow slab extends into the corresponding pier.

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