A construction method for prefabricated and assembled bridges based on BIM

Abstract

The present invention discloses a construction method for prefabricated assembled bridges based on BIM, belonging to the technical field of prefabricated bridge construction, which includes steps such as construction terrain collection and geological condition exploration; constructing prefabricated assembled bridge components; scaling the data of bridge components in proportion; constructing simulation tests, etc. By combining BIM technology, the present invention first conducts miniaturized simulation on the process of applying BIM to actual projects, discovers construction defects in a timely manner, and finally applies the verified construction process to actual construction for bridge construction; the specific construction process and assembly process have been pre-simulated, so that the subsequent construction of sudden situations is reduced, defects can be eliminated in a timely manner, and it is beneficial to improve the process quality.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated bridge construction, and particularly to a construction method for prefabricated bridges based on BIM. Background Art

[0002] Prefabricated bridges have been applied in the municipal engineering of various cities. That is, components such as cast-in-place bridge piers, tie beams, and cap beams are prefabricated in factories and installed on-site by cranes.

[0003] As a data-based tool applied to engineering construction management, BIM technology has been widely used in developed regions such as Europe and the United States and is also relatively widely used in the domestic construction industry. BIM technology has eight characteristics: information completeness, information relevance, information consistency, visualization, coordination, simulation, optimization, and drawing generation.

[0004] Patent No. 202010127807.7 discloses a technical solution for tracking and monitoring components. Aiming at the complex construction environment and potential engineering hazards in existing engineering construction, BIM is used to build a simulated construction of prefabricated bridges to eliminate potential hazards in subsequent construction operations, quality, and processes. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art and propose a construction method for prefabricated bridges based on BIM, thereby solving the problems existing in the prior art.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A construction method for prefabricated bridges based on BIM, characterized by including the following steps:

[0008] Step 1. Collect construction terrain and explore geological conditions, and design construction drawings;

[0009] Step 2. According to the construction drawings, use Autodesk to construct prefabricated bridge components, and the bridge components include columns, cap beams, and upper beam bodies;

[0010] Step 3. Scale the data of the bridge components in Step 2;

[0011] Step 4. According to the ratio, construct any number of bridge components from at least six to ten spans and number them one by one;

[0012] Step 5. Establish a simulated assembly construction test device to simulate process traceability, quality supervision, and dynamic monitoring during construction;

[0013] Step 6: Apply the construction process verified in Step 5 above to actual construction for bridge construction.

[0014] Preferably, the construction terrain is collected by aerial photography using a drone to obtain the terrain of the construction area.

[0015] Preferably, the scale used in Step 3 is 1:100.

[0016] Preferably, input the elevation of the data collected from the construction terrain into a computer for storage, and perform a three-dimensional scaling of the spatial coordinates according to the measurement point method to obtain simulated test terrain data.

[0017] Preferably, the assembly construction test device includes a bottom plate, with side plates fixedly connected to both ends of the upper side of the bottom plate. A cross plate is slidably connected to the upper ends of the two side plates, and the cross plate is slidably connected to a soil distribution device.

[0018] Preferably, pressure sensors are arranged at intervals on the upper side of the bottom plate.

[0019] Preferably, simulate bridge assembly on the bottom plate.

[0020] Preferably, a sliding seat is slidably connected to the cross plate, the soil distribution device is fixedly connected to one side of the sliding seat, and the sliding seat is provided with a compaction device. The compaction device includes a limiting plate, the limiting plate is in a square bar structure, both ends of the limiting plate are in sliding contact with the side plates, a wavy through groove is provided through the limiting plate, a cylinder is rotatably connected to one side of the sliding seat, the cylinder is slidably fitted in the through groove, limiting rings are provided at both ends of the cylinder, a suspension rod is provided on one side of the limiting plate, and a pressing plate is fixedly connected to the lower end of the suspension rod.

[0021] Preferably, a support frame is fixedly connected to one side of the limiting plate. The cross section of the suspension rod is in a swallowtail or "T" shape structure. A guiding groove is provided on one side of the support frame, the suspension rod is slidably connected to the guiding groove, and an electric push rod is fixedly connected to one side of the suspension rod.

[0022] Preferably, an arc groove is provided at the bottom of the pressing plate, a bulging rubber sheet is fixedly connected in the arc groove, a communicating pipe is provided on the upper side of the pressing plate, the communicating pipe is communicated with the bulging rubber sheet, a piston rod is slidably connected in the communicating pipe, and a wavy plate is fixedly connected to the middle of the inner wall of one of the side plates. The bottom of the wavy plate can contact and press the piston rod.

[0023] The advantages of the present invention are as follows: The prefabricated and assembled bridge construction method based on BIM provided by the present invention combines BIM technology, miniaturizes and simulates the process of applying BIM to actual projects first, discovers construction defects in a timely manner, and finally applies the verified construction process to actual construction for bridge construction; the specific construction process and assembly process have been pre-simulated, reducing subsequent construction emergencies, being able to eliminate defects in a timely manner, and being beneficial to improving the process quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the working flowchart of the present invention;

[0025] Figure 2 is the structural schematic diagram of the assembly construction test device of the present invention;

[0026] Figure 3 is the structural schematic diagram of Embodiment 2 of the present invention;

[0027] Figure 4 is Figure 3 the partial enlarged view at position E in;

[0028] Figure 5 is the structural schematic diagram of the pressure plate;

[0029] Figure 6 is the schematic diagram of the working principle of the trigger button. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Embodiment 1

[0032] As Figure 1-2 shown, a prefabricated and assembled bridge construction method based on BIM provided by the present invention includes the following steps:

[0033] Step 1. Construction terrain collection and geological condition exploration. The construction terrain collection is obtained by using an unmanned aerial vehicle (UAV) to take aerial photos of the construction area. For the application technology of the UAV, refer to a terrain data collection device based on LIDAR in CN215599369U to obtain lidar point cloud data and design construction drawings;

[0034] Step 2. According to the construction drawings, use Autodesk to construct prefabricated and assembled bridge components, or use the Revit modeling platform to establish. The bridge components include columns 1, capping beams 2, and upper beam bodies 3. For the specific application of BIM, refer to the BIM-based prefabricated bridge construction method in CN106988221B, and it is better than its simulation method. The actual construction method is simulated, which is more in line with the actual situation;

[0035] Step 3. Scale the bridge component data in Step 2 to facilitate experiments indoors or on workbenches, and customize construction equipment according to the scale, such as a crane. The customized equipment can be used in pre-simulation tests for different projects and has strong versatility;

[0036] Step 4. Based on the proportions, construct at least six to ten bridge components, each numbered individually. For example, column 1 is numbered 1.1, 1.2, 1.3, and so on. This allows for monitoring any abnormalities in a specific component, including any adverse effects on the overall assembly and construction process, and helps mitigate potential risks.

[0037] Step 5. Establish a simulated assembly construction test device 4 to simulate process traceability, quality supervision, and dynamic monitoring during construction;

[0038] Step 6: Apply the construction technology verified in step 5 above to actual bridge construction; the specific construction technology and assembly process have been pre-simulated to reduce subsequent construction emergencies, eliminate defects in a timely manner, and improve process quality.

[0039] In the above process, the scaling ratio used in step 3 is 1:100 or other ratios, which can be flexibly selected according to specific needs of the test site.

[0040] The elevation data collected from the construction terrain is input into a computer for storage, and the spatial coordinates are scaled in three dimensions using the measurement point method to obtain simulated test terrain data. The assembly construction test device 4 comprises a base plate 41, with both ends of the upper side of the base plate 41 fixedly connected to side plates 42. The upper ends of the two side plates 42 are slidably connected to a cross plate 43, which is slidably connected to a soil distribution device 44. Pressure sensors are spaced apart on the upper side of the base plate 41.

[0041] The movement of the soil distribution device 44 and the cross plate 43 can be pushed by a cylinder or an electric push rod 58, or driven by a screw motor to move in the longitudinal or lateral direction. Computer data is combined with the built-in flow control meter of the soil distribution device 44 to distribute soil according to the terrain to form a soil layer. Pressure sensors are pre-buried in the soil layer to compact the soil layer according to the geological conditions. Subsequently, foundation construction and bridge assembly operations are carried out on the soil layer to facilitate construction simulation and provide technical reference for subsequent construction.

[0042] A simulated bridge assembly is performed on the base plate 41; by performing the simulation in advance, it is convenient to connect the construction conditions in advance, avoid some unexpected situations, and thus improve the quality of subsequent construction.

[0043] Example 2

[0044] like Figure 2-4As shown, since the soil particles screened in Example 1 are relatively loose, another structure is disclosed in this embodiment. The horizontal plate 43 is slidably connected to the sliding seat 45, and the soil distribution device 44 is fixedly connected to one side of the sliding seat 45. The sliding seat 45 is provided with a compacting device 5, and the compacting device 5 includes a limit plate 51. The limit plate 51 is a square bar structure. Both ends of the limit plate 51 are in sliding contact with the side plate 42. The limit plate 51 is penetrated by a wavy through groove 52. One side of the sliding seat 45 is rotatably connected to the cylinder 53, and the cylinder 53 is slidably adapted in the through groove 52. Limiting rings 54 are provided at both ends of the cylinder 53, and a suspension rod 55 is provided on one side of the limit plate 51. The lower end of the suspension rod 55 is fixedly connected to the pressure plate 56.

[0045] Under the limiting action of the two side plates 42, when the limiting plate 51 moves horizontally between the side plates 42, the sliding seat 45 pushes the cylinder 53 longitudinally in the through groove 52. As the shape of the through groove 52 fluctuates, the limiting plate 51 is lifted or lowered in conjunction with the deadweight of the limiting plate 51 and the pressure plate 56, so that the pressure plate 56 under the boom 55 can punch the fallen soil blocks, thereby facilitating the compaction of the soil blocks and avoiding insufficient foundation strength, which affects the subsequent bridge construction simulation.

[0046] One side of the limit plate 51 is fixedly connected to the support frame 57. The cross section of the suspension rod 55 is a dovetail or "T"-shaped structure. A guide groove is provided on one side of the support frame 57. The suspension rod 55 is slidably connected to the guide groove. One side of the suspension rod 55 is fixedly connected to the electric push rod 58.

[0047] A trigger button 59 is provided on one side of the suspension rod 55, and a vertical rod 591 is fixedly connected to the upper side of the base plate 41, and the vertical rod 591 corresponds to the trigger button 59. As shown in Figure 6, the contact surface of the spring-reset trigger button 59 is provided with a contact piece for connecting the disconnected wire, so that the trigger button 59 can connect the circuit when it is pressed. After the circuit is connected, the electric push rod 58 is configured so that the electric push rod 58 can be contracted by pressing a stroke, and correspondingly the pressure plate 56 is raised by a stroke, thereby facilitating the gradual compaction of the soil layer in layers and facilitating uniform compaction of the foundation.

[0048] Example 3

[0049] like Figure 2-5As shown, on the basis of Embodiment 2, the flat pressing plate 56 has a relatively large pressing contact surface, resulting in insufficient compaction. Therefore, in this embodiment, other structures of the pressing plate 56 are further disclosed. An arc-shaped groove 561 is provided at the bottom of the pressing plate 56, and a bulging rubber sheet 562 is fixedly connected in the arc-shaped groove 561. A communicating pipe 563 is provided on the upper side of the pressing plate 56, and the communicating pipe 563 is communicated with the bulging rubber sheet 562. A piston rod 564 is slidably connected in the communicating pipe 563. In the middle of the inner wall of one side plate 42, a corrugated plate is fixedly connected, and the bottom of the corrugated plate can contact and press the piston rod 564. When the piston rod 564 abuts against the corrugated plate, it is used to press the cavity between the bulging rubber sheet 562 and the arc-shaped groove 561, so that the bulging rubber sheet 562 bulges outwards from the arc-shaped groove 561. The undulation of the corrugated plate is arranged in cooperation with the undulation of the corrugated through groove 52, so that when the bulging rubber sheet 562 bulges out to fill the arc-shaped groove 561, it just presses on the topmost layer of soil, making the final soil surface flat.

[0050] By providing the arc-shaped groove 56l, when the pressing plate 56 impacts and compacts, the protruding position at the bottom of the pressing plate 56 is convenient for pressing out grooves in the soil layer, and the soil particles are collected in the arc-shaped groove 561, so as to facilitate the embedding of the next layer of soil particles, thereby improving the density. When pressing the final layer, the bulging rubber sheet 562 of the pressing plate 56 is first pressed and bulges out of the bottom surface of the pressing plate 56 by the piston rod 564. When the pressing plate 56 presses on the topmost layer of soil particles, the bottom of the pressing plate 56 is flat due to the bulging rubber sheet 562, so as to facilitate pressing out a flat foundation surface, which is convenient for conforming to the actual engineering conditions, thereby providing a dense and flat foundation for the calculation of bridge construction.

[0051] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A BIM-based prefabricated and assembled bridge construction method, characterized in that: The steps include: Step 1. Collect construction terrain and explore geological conditions, and design construction drawings; Step 2. Based on the construction drawings, use Autodesk to build prefabricated assembled bridge components, which include columns (1), cap beams (2), and upper beams (3); Step 3. Scale the bridge component data in step 2; Step 4. Construct at least six to ten spans of bridge components according to the scale and number them one by one; Step 5. Establish a simulated assembly construction test device (4) to simulate process traceability, quality supervision, and dynamic monitoring during construction; Step 6. Apply the construction technology verified in step 5 above to actual construction of the bridge; The assembly construction test device (4) comprises a bottom plate (41), the upper ends of the bottom plate (41) are fixedly connected to side plates (42), the upper ends of the two side plates (42) are slidably connected to a transverse plate (43), and the transverse plate (43) is slidably connected to a soil distribution device (44); Pressure sensors are arranged at intervals on the upper side of the bottom plate (41); Performing simulated bridge assembly on the base plate (41); The horizontal plate (43) is slidably connected to a sliding seat (45), and the soil distribution device (44) is fixedly connected to one side of the sliding seat (45). The sliding seat (45) is provided with a compacting device (5), and the compacting device (5) includes a limit plate (51). The limit plate (51) is a square bar structure. Both ends of the limit plate (51) are in sliding contact with the side plate (42). The limit plate (51) is penetrated by a wave-shaped through groove (52). One side of the sliding seat (45) is rotatably connected to a cylinder (53). The cylinder (53) is slidably adapted in the through groove (52). Both ends of the cylinder (53) are provided with limit rings (54). One side of the limit plate (51) is provided with a suspension rod (55), and the lower end of the suspension rod (55) is fixedly connected to a pressure plate (56); One side of the limit plate (51) is fixedly connected to the support frame (57); the cross section of the suspension rod (55) is a dovetail or T-shaped structure; one side of the support frame (57) is provided with a guide groove; the suspension rod (55) is slidably connected to the guide groove; and one side of the suspension rod (55) is fixedly connected to the electric push rod (58); An arc-shaped groove (561) is provided at the bottom of the pressure plate (56), and a bulging rubber sheet (562) is fixedly connected in the arc-shaped groove (561). A connecting pipe (563) is provided on the upper side of the pressure plate (56), and the connecting pipe (563) is connected to the bulging rubber sheet (562). A piston rod (564) is slidably connected in the connecting pipe (563). A wavy plate is fixedly connected to the middle of the inner wall of one of the side plates (42), and the bottom of the wavy plate can contact and press the piston rod (564).

2. The BIM-based prefabricated bridge construction method according to claim 1, characterized in that: The construction terrain collection uses drone aerial photography to obtain the terrain of the construction area.

3. The BIM-based prefabricated bridge construction method according to claim 1, characterized in that: The scale used in step 3 is 1:

100.

4. The BIM-based prefabricated bridge construction method according to claim 1, characterized in that: The elevation of the data collected from the construction terrain is input into the computer for storage, and the spatial coordinates are scaled in three dimensions based on the measurement point method to obtain the simulated test terrain data.

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