BIM (Building Information Modeling)-based adjustable modular arc-shaped shear wall template construction method
Through the adjustable modular arc shear wall formwork construction method based on BIM model, the arc adjustment system of the ridge-covered molding unit and the pull-screw type formwork arc adjustment system is used to solve the problems of low turnover rate, high cost and poor molding effect in the construction of arc shear walls, and an efficient and economical arc shear wall forming effect is achieved.
Patent Information
- Application Number
- CN202510099250.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-05-02
AI Technical Summary
The traditional adjustable modular curved shear wall formwork has problems such as low turnover rate, high cost and poor molding effect during construction, which is difficult to meet the quality requirements of smooth and smooth wall lines of arc shear walls.
The adjustable modular arc shear wall formwork construction method based on BIM model is adopted, and the template construction drawing is generated through intelligent formwork design software. The combination of the ridge-covered formwork unit and the radian adjustment system of the formwork type is achieved to achieve accurate arc adjustment and rapid assembly and disassembly of the formwork.
The turnover rate of arc shear wall formwork is improved, the construction cost is reduced, and the formation effect of arc shear wall is ensured, with natural and smooth lines and good appearance, solving multiple quality and economic benefits problems of traditional forms in arc shear wall construction.
Smart Images
Figure CN119914060A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of building construction, and in particular relates to an adjustable modular arc-shaped shear wall formwork construction method based on a BIM model. Background Art
[0002] As people continue to pursue the beauty and novelty of architectural appearance, modern large public buildings are increasingly inclined to adopt curved designs. Curved designs not only give buildings a unique italic shape, but also transform static spaces into lively dynamic environments through their soft gestures, which are concentrated in the appearance of buildings. This design trend is particularly prominent in sewage treatment plants, car ramps, cultural centers, gymnasiums, theaters and other buildings, which all adopt complex and irregular curved concrete structures.
[0003] There are two traditional reinforcement methods for adjustable modular curved shear walls. One is to use standardized steel molds. The advantages are high rigidity, high strength and good stability, but they can only be customized and processed off-site, the curvature cannot be adjusted on site, the turnover rate is low, and the cost is high. The second is to use traditional wooden molds to cut units and then reinforce them in pieces. The advantage is that they can be adjusted according to the curved shear wall on site, but the assembly volume is large, the processing cost is high, and the many joints lead to poor wall forming effects. It cannot meet the quality requirements of smooth and fluent lines of the curved shear wall, and the turnover effect is poor after cutting, and the cost is high. Summary of the invention
[0004] The purpose of the embodiments of the present invention is to provide an adjustable modular curved shear wall formwork construction method based on a BIM model, aiming to solve the problems raised in the above-mentioned background technology.
[0005] The embodiment of the present invention is implemented as follows: the construction method of the adjustable modular curved shear wall formwork of the BIM model comprises the following steps: BIM model design: Use intelligent formwork design software to import corresponding shear wall unit information and automatically generate formwork construction drawings; Mould matching work: make the corrugated plastic-covered formwork unit, and open adjustment holes on the back corrugations of the wooden beams of the corrugated plastic-covered formwork unit; Curve forming: The inner and outer arcs are adjusted by adjusting the adjustment holes and the tension screws to form a template curvature adjustment system; Assembling unit formwork: connecting each formwork unit horizontally and vertically; Formwork system reinforcement: holes are opened at equal intervals on the formwork, and tension bolts are inserted for reinforcement to form an adjustable modular curved shear wall formwork system; Concrete pouring: concrete pouring and material discharging; Formwork removal and cleaning: Remove the vertical formwork and plastic-covered formwork, then clean and store them.
[0006] Preferably, the steps of BIM model design are specifically: Using intelligent formwork design software, import the corresponding shear wall unit information, automatically generate formwork construction drawings, form plane formwork drawings, 3D modeling drawings, and generate reinforcement samples at the same time, integrate and optimize formwork cutting, and export detailed material lists for formwork units; Use 3D modeling to provide visual briefings to workers.
[0007] Preferably, the steps of the mold matching work are specifically: Panel production: The panels are made of plywood with moderate strength and toughness, and are covered with high-quality plastic film on both sides to increase their durability. They are cut and processed on-site into template units according to the mold drawing; Back rib production: The main back rib is a wooden beam. After being positioned according to the calculated spacing, it is bonded to the panel with phenolic resin glue and mechanically fixed with steel nails to form a ribbed plastic-covered formwork unit. Then, an elliptical wide hole is opened between the wooden beam back rib as an adjustment hole.
[0008] Preferably, the curvature forming step is specifically: According to the position of the arc shear wall where the formwork unit is located, it is divided into outer arc and inner arc. The outer arc is installed with the top support screws between the ribs, and the inner arc is installed with the tension screws between the ribs; Make a curved mold, place the template unit flat on the curved mold, and use the toughness of the plastic-coated template to bend the template unit until the curvature is consistent with the arc mold; Tighten the adjusting nuts in sequence to ensure that the screws are fully loaded to fix the wooden beams, until the curvature of the adjusted panel is consistent with the curvature of the model.
[0009] Preferably, the steps of assembling the unit template are specifically: Horizontal connection: The horizontal connection between each formwork unit is bolted; Vertical connection: Angle irons are used to press the vertical formwork together.
[0010] Preferably, the specific steps are as follows: holes are opened on the template at equal intervals, tension bolts are inserted, and arc-shaped steel pipes or steel bars are used as the main keel to connect with the mountain-shaped clamps.
[0011] The adjustable modular curved shear wall formwork construction method based on the BIM model provided in the embodiment of the present invention has strong adaptability and saves costs. The curved construction site adjustment can be realized by matching the corrugated plastic-coated formwork unit with the tension screw formwork curvature adjustment system, which effectively solves the problems of low turnover, high cost and material waste caused by cutting of customized steel formwork and traditional wooden formwork. The formwork has excellent performance. The adjustable modular curved shear wall formwork has high strength and rigidity, good stability, strong bearing capacity, and good concrete forming effect after demoulding. It solves a series of quality problems caused by the traditional wooden formwork. The construction can achieve the effect of plain concrete, without chiseling and secondary plastering and leveling. Modular design, strong scalability: The formwork unit components are modularized and standardized, easy to operate, and the plastic-coated corrugated formwork unit combination and the tension screw-type formwork arc adjustment system module can be mass-processed at the construction site, and has strong scalability; High turnover rate and significant economic benefits: This method greatly improves the turnover rate of the curved shear wall formwork, reduces construction costs, has good forming effects, and saves the cost of chiseling and repairing the curved shear wall concrete and secondary plastering and leveling; Good forming effect and good social benefits: By adopting the tension screw type formwork curvature adjustment system, the problem of accurate matching of curved shear wall formwork is solved. The curved shear wall has excellent forming effect, natural curvature, smooth lines and good appearance. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 A flowchart of a construction method for an adjustable modular curved shear wall formwork based on a BIM model provided in an embodiment of the present invention; Figure 2 A planar mold matching and template numbering diagram provided for an embodiment of the present invention; Figure 3 A schematic diagram of a three-dimensional modeling visualization briefing provided by an embodiment of the present invention; Figure 4 A schematic diagram of an elliptical adjustment hole provided in an embodiment of the present invention; Figure 5 A schematic diagram of an outer arc screw support provided by an embodiment of the present invention; Figure 6 A schematic diagram of an inner arc screw support provided by an embodiment of the present invention; Figure 7 The construction drawing for adjusting the curvature of the outer arc template provided in the embodiment of the present invention; Figure 8 The construction drawing for adjusting the curvature of the inner arc template provided in the embodiment of the present invention; Fig. 9 A schematic diagram of horizontal connection of template units provided in an embodiment of the present invention; Fig.10 A schematic diagram of vertical connection of template units provided in an embodiment of the present invention; Fig.11 A construction drawing for reinforcing a tensioning screw provided in an embodiment of the present invention; Fig.12 This is a casting effect diagram provided by an embodiment of the present invention. DETAILED DESCRIPTION
[0013] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 intended to limit the present invention.
[0014] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.
[0015] like Figure 1 As shown, it is a flowchart of an adjustable modular curved shear wall formwork construction method based on a BIM model provided by an embodiment of the present invention, including: technical preparation, formwork matching, arc forming, assembly unit formwork, formwork system reinforcement, inspection and acceptance, concrete pouring, formwork removal and cleaning, etc.; The specific process is as follows: 1. Technical preparation: 1.1. BIM model design: Use intelligent template design software to import the corresponding shear wall unit information, automatically generate template construction drawings, form plane template drawings, 3D modeling drawings, and generate reinforcement samples at the same time, integrate and optimize template cutting, and export detailed material lists for template units, such as Figure 2 As shown; 1.2. Visual briefing: Use 3D modeling to conduct visual briefings to workers, such as Figure 3 As shown; 2. Mold matching work: 2.1. Formwork unit matching: The main back ribs are made of 40x100mm wooden beams, the panel formwork is 15mm thick, and the maximum size is 1220x2440mm; the templates are covered with high-quality plastic film on both sides to ensure the quality of the curved shear wall concrete molding, while improving the toughness of the panel and expanding the applicable range of the panel curvature; the wooden back ribs are positioned according to the spacing calculated by the software, bonded to the panel with imported phenolic resin glue, and mechanically fixed with steel nails to form a ribbed plastic-covered formwork unit; 2.2. Elliptical adjustment holes are set at equal intervals on the back ribs of the wooden beams to provide sufficient space for the adjustment screw to adjust the curvature of the template, such as Figure 4 As shown; 3. Arc forming: 3.1. Distinguish between outer arc and inner arc: According to the position of the arc shear wall where the formwork unit is located, it is divided into outer arc and inner arc. The outer arc is installed with the top support screw between the ribs, and the inner arc is installed with the tension screw between the ribs. Figure 5 , Figure 6 As shown; 3.2. Curvature adjustment: According to the 1:1 lofting of the curved shear wall designed in the construction drawings, make a curvature mold, place the template unit flat on the arc-shaped mold prefabricated according to the drawing, and use the toughness of the plastic-coated template to bend the template unit until the curvature is consistent with the arc-shaped mold; Tighten the adjusting nuts in sequence to make the screws fully loaded to fix the wooden beams, until the curvature of the adjusted panel is consistent with the curvature of the model (inner arc adjustment: use screws to pull each other and tighten the back ribs to make the template arch outward; outer arc adjustment: use screws to support and make the template concave). Figure 7 , Figure 8 As shown; 4. Assembly unit template: 4.1. Horizontal connection: The horizontal connection between each formwork unit is connected by M16x100 bolts. The wooden beams between adjacent formworks are spliced with a 5mm unevenness, staggered and overlapped, and fastened with screws to prevent leakage. Fig. 9 As shown; 4.2. Vertical connection: The upper and lower overlaps of the formwork adopt staggered overlaps of wooden formwork. The upper formwork wooden formwork protrudes 2cm, and the lower formwork is recessed 2cm. The vertical templates are pressed with L63x40x6mm angle irons to prevent leakage. Fig.10 As shown; 5. Formwork system reinforcement: Tension bolt reinforcement: holes are opened at equal intervals on the template, and M14 tension bolts are inserted. Arc steel pipes or steel bars are used as the main keel to connect with the mountain-shaped clamp. When steel bars are used as keels, HRB400 grade steel bars with a diameter greater than 20mm are used. Fig.11 As shown; 6. Inspection and acceptance: Verticality detection: Use plumb bob and steel tape measure to fully detect the verticality of the template to ensure that the verticality of the template meets the requirement of ≤6mm, and adjust the template that does not meet the requirement; 7. Concrete pouring: Casting requirements: The thickness of each layer of arc shear wall concrete casting is 0.5cm, the vibration radius of the vibrating rod is ≤250mm, and the rod should be inserted quickly and pulled out slowly during vibration until the concrete bubbles become less. When the wall height is greater than 3mm, use a string tube or pumping hose to feed the material downward during concrete casting. The casting and molding effect is as follows: Fig.12 As shown; 8. Demolding and cleaning: 8.1. Formwork removal conditions: The vertical formwork can be removed only when the concrete strength can ensure that its surface and edges are not damaged by formwork removal. When removing the plastic-coated formwork, steel chisels cannot be used to force it, so as not to damage the plastic formwork on the formwork surface and shorten the life of the formwork. 8.2. Cleaning and storage: After cleaning the surface concrete of the dismantled formwork units, stack them in the air to avoid moisture. When the curvature of the shear wall changes, loosen the screws between the ribs in time after removing the formwork to facilitate secondary curvature adjustment.
[0016] The adjustable modular curved shear wall formwork construction method based on the BIM model can be widely used in civil construction projects. The construction formwork has low loss, simple construction, short construction period and good economic benefits. Compared with the customized steel formwork, wooden formwork and traditional wooden formwork cut and reinforced formwork system used in the market, the new formwork system can be turned over multiple times (more than 8 times), the curvature can be adjusted, and the consumption of formwork materials and the kicking, repairing and secondary plastering and leveling costs caused by expanding formwork, joint leakage and unnatural curvature can be saved. Taking the Jiangyan sewage treatment plant project as an example (the contact area of the formwork is 3,600 square meters), the specific construction cost comparison is shown in Table 1: Table 1 Construction cost comparison details name Customized steel and wooden molds Traditional wood formwork cutting unit after reinforcement Adjustable modular curved shear wall formwork Template contact area 3600m² 3600m² 3600m² Turnover times 2 1 8 Price per square meter 3600 3600 900 Labor costs and repair costs Labor cost + formwork and wood material cost = 45 + 55 + 7 = 107 yuan / m² Labor cost + formwork and wood material cost = 90 + 20 + 11 = 121 yuan / m² Labor cost + formwork material cost = 35 + 16 = 51 yuan / m² Secondary plastering and leveling costs 10 yuan / m² 10 yuan / m² 0 Average construction time per section (50 meters) 0 Labor cost + material cost = 23.81 yuan / m² 0 Cost Comparison 117x3600=421,200 154.81x3600=557,300 51x3600=183,600 Comparison of construction period 10 days 15 days 10 days Completed area 3600m 2 According to calculations, costs can be saved and a total economic benefit of 373,700 yuan can be generated; the formwork is simple, which reduces formwork loss by 50%, shortens the construction period by 50%, and achieves excellent curved shear wall forming effect.
[0017] 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 in the protection scope of the present invention.
Claims
1. The adjustable modular curved shear wall formwork construction method based on the BIM model is characterized by: The following steps are involved: BIM model design: Use intelligent formwork design software to import corresponding shear wall unit information and automatically generate formwork construction drawings; Mould matching work: make the corrugated plastic-covered formwork unit, and open adjustment holes on the back corrugations of the wooden beams of the corrugated plastic-covered formwork unit; Curve forming: The inner and outer arcs are adjusted by adjusting the adjustment holes and the tension screws to form a template curvature adjustment system; Assembling unit formwork: connecting each formwork unit horizontally and vertically; Formwork system reinforcement: holes are opened at equal intervals on the formwork, and tension bolts are inserted for reinforcement to form an adjustable modular curved shear wall formwork system; Concrete pouring: concrete pouring and unloading; Formwork removal and cleaning: Remove the vertical formwork and plastic-covered formwork, then clean and store them.
2. The adjustable modular curved shear wall formwork construction method based on the BIM model according to claim 1 is characterized in that: The steps of BIM model design are specifically as follows: Using intelligent formwork design software, import the corresponding shear wall unit information, automatically generate formwork construction drawings, form plane formwork drawings, 3D modeling drawings, and generate reinforcement samples at the same time, integrate and optimize formwork cutting, and export detailed material lists for formwork units; Use 3D modeling to provide visual briefings to workers.
3. The adjustable modular curved shear wall formwork construction method based on the BIM model according to claim 1 is characterized in that: The steps of the mold matching work are specifically as follows: Panel production: The panels are made of plywood with moderate strength and toughness, and are covered with high-quality plastic film on both sides to increase their durability. They are cut and processed on-site into template units according to the mold drawing; Back rib production: The main back rib is a wooden beam. After being positioned according to the calculated spacing, it is bonded to the panel with phenolic resin glue and mechanically fixed with steel nails to form a ribbed plastic-covered formwork unit. Then, an elliptical wide hole is opened between the wooden beam back rib as an adjustment hole.
4. The adjustable modular curved shear wall formwork construction method based on the BIM model according to claim 1 is characterized in that: The steps of arc forming are specifically as follows: According to the position of the arc shear wall where the formwork unit is located, it is divided into outer arc and inner arc. The outer arc is installed with the top support screws between the ribs, and the inner arc is installed with the tension screws between the ribs; Make a curved mold, place the template unit flat on the curved mold, and use the toughness of the plastic-coated template to bend the template unit until the curvature is consistent with the arc mold; Tighten the adjusting nuts in sequence to ensure that the screws are fully loaded to fix the wooden beams, until the curvature of the adjusted panel is consistent with the curvature of the model.
5. The adjustable modular curved shear wall formwork construction method based on the BIM model according to claim 1 is characterized in that: The steps of assembling the unit template are specifically as follows: Horizontal connection: The horizontal connection between each formwork unit is bolted; Vertical connection: Angle irons are used to press the vertical formwork together.
6. The adjustable modular curved shear wall formwork construction method based on the BIM model according to claim 1 is characterized in that: The steps of reinforcing the template system are specifically as follows: opening holes at equal intervals on the template, inserting tension bolts, and using arc-shaped steel pipes or steel bars as the main keel to connect the mountain-shaped clamps.