BIM (Building Information Modeling)-based precast beam cast-in-place section template plugging shaping device and construction method

Abstract

The invention discloses a BIM-based precast beam cast-in-place section formwork plugging shaping device and a construction method, a precast beam comprises two beam bodies which are perpendicular to each other, a cast-in-place section is located at the joint of the two beam bodies, and the shaping device comprises a bottom plate; the two side plates are used for being clamped on the two opposite sides of one beam body, are vertically arranged on the bottom plate and can slide relative to the bottom plate so that the distance between the two side plates can be matched with the width of one beam body; the opposite-pull screws are used for penetrating through the beam body clamped between the two side plates and fixing the two side plates to the two opposite sides of the beam body; the bottom plate, the two side plates and the multiple opposite-pull screws are subjected to parametric design through the BIM technology so as to be used for factory shaping machining, the factory shaping machining of different precast beam cast-in-place section formwork plugging shaping devices is achieved based on the parametric design of the BIM, the construction efficiency is improved, material waste is reduced, and high popularization value is achieved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a BIM-based precast beam cast-in-place section formwork sealing standardization device and construction method. Background Technology

[0002] Currently, prefabricated monolithic frame structures contain a large number of prefabricated components, among which prefabricated beams account for a very large proportion. When prefabricated beams are connected by primary and secondary beams, they will form T-shaped or cross-shaped cast-in-place sections.

[0003] Traditionally, cast-in-place sections of precast beams typically employ on-site fabrication of appropriately sized wooden formwork, secured with tie rods, steel pipes, and other methods during concrete pouring. This method of constructing joints in cast-in-place sections has the following drawbacks:

[0004] 1) On-site manual processing of wooden formwork results in low construction efficiency and high labor costs.

[0005] 2) Once the concrete of the first-floor cast-in-place section reaches its strength, the sealing formwork is removed and becomes unusable. Removing the formwork can easily cause damage and render it unusable, resulting in significant material waste and increased material costs.

[0006] 3) For buildings with many standard floors, repeated use is not possible. Workers need to process them manually on-site, one by one, floor by floor, which makes it impossible to achieve integration. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, this invention provides a BIM-based standardized device and construction method for sealing precast beam cast-in-place sections formwork. Based on BIM parametric design, it enables standardized factory processing of different standardized devices for sealing precast beam cast-in-place sections formwork, improving construction efficiency and reducing material waste.

[0008] To achieve the above objectives, this invention provides a BIM-based standardized formwork sealing device for cast-in-place sections of precast beams. The precast beam comprises two beam bodies arranged perpendicularly to each other, and the cast-in-place section is located at the connection point of the two beam bodies. The standardized device includes:

[0009] A base plate, used to be placed at the bottom of the connection between the two beams;

[0010] Two side plates are used to clamp onto opposite sides of one of the beams, and are vertically disposed on the base plate. They can slide relative to the base plate so that the distance between them is adapted to the width of one of the beams. At least one of the side plates has a connecting groove at the position corresponding to the other beam. A plurality of first ear plates are fixedly connected to the outside of the connecting groove perpendicular to the plate surface of the side plate. The plurality of first ear plates enclose a placement space for the end of the other beam near the connection point to be placed to support the end.

[0011] Multiple tie rods are used to pass through the beam clamped between two side plates and to fix the two side plates to opposite sides of the beam;

[0012] The base plate, the two side plates, and the multiple tie rods are all parametrically designed using BIM technology for standardized factory processing.

[0013] Preferably, the cross-sectional dimension of the base plate is larger than the cross-sectional dimension of the cast-in-place section.

[0014] Preferably, the top of the side plate is flush with the top of the two beams.

[0015] Preferably, each of the two ends of the pull rod along its length passes through the corresponding side plate and is fixedly connected to the corresponding side plate by a fixing nut.

[0016] Preferably, each of the side plates is fixedly connected to a second ear plate on the outer side of the bottom. A sliding rod is provided between the second ear plate and the bottom plate. The first end of the sliding rod is fixedly connected to the corresponding second ear plate, and the second end is slidably connected to the bottom plate. A sliding groove is provided on the bottom plate for the second end of the sliding rod to slide.

[0017] An adjustable and standardized construction method for sealing the formwork of the cast-in-place section of a precast beam, wherein the formwork of the cast-in-place section of the precast beam is sealed by the aforementioned standardized device, and the construction method includes the following steps:

[0018] In BIM software, the standardized device is parametrically designed based on the height of the two precast beams and the cross-sectional dimensions of the cast-in-place section, so as to form multiple standardized devices that can be adapted to different precast beams.

[0019] The shaping device is installed at the connection of the two precast beams, and the bottom plate is located at the bottom of the connection. The end of the other beam near the connection is located in the connecting groove, thereby supporting the end through multiple first ear plates.

[0020] The two side plates are slid relative to the bottom plate to adjust the distance between the two side plates so that the distance between the two side plates matches the width of one of the beams, and the two side plates are fixed relative to each other by multiple tie rods;

[0021] Concrete is poured into the ends of the two beams near the connection point and into the space enclosed by the shaping device to seal the connection point.

[0022] Preferably, after parametric design of the standardized device, the corresponding processing data is extracted according to BIM software, and the factory performs standardized processing on different standardized devices. After processing, each standardized device is marked and numbered so that it corresponds to the position of the corresponding precast beam cast-in-place section.

[0023] Preferably, after the concrete is poured, it is cured and, once it reaches the design strength, the shaping device is removed and recycled to achieve reuse.

[0024] By adopting the above technical solution, the present invention has the following beneficial effects:

[0025] (1) Environmental Effect Analysis

[0026] 1) Standardized factory processing, and can be reused repeatedly;

[0027] 2) Using BIM technology for parametric design can ensure the accuracy of various processing data for the equipment;

[0028] 3) The construction of this device is less affected by external environmental factors, such as weather.

[0029] 4) The device will not generate pollution or construction waste during construction, making it a safe, reliable device with significant environmental benefits.

[0030] (2) Project duration and performance analysis

[0031] This device requires no on-site manual processing and is easy to install, significantly improving construction efficiency. Furthermore, for cast-in-place sections or standard floors of the same type and size, it can be removed and reused after the strength has been achieved, thus reducing costs and increasing efficiency. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This is a perspective view of the BIM-based precast beam cast-in-place section formwork sealing and standardization device in an embodiment of the present invention.

[0034] Figure 2 This is a top view of the BIM-based precast beam cast-in-place section template sealing and standardization device in an embodiment of the present invention.

[0035] Figure 3 This is a front view of the BIM-based precast beam cast-in-place section template sealing and standardization device in an embodiment of the present invention.

[0036] Figure 4 This is a side view of the BIM-based precast beam cast-in-place section template sealing and standardization device in an embodiment of the present invention.

[0037] Figure 5 This is an installation diagram of two beams connected in a cross shape using an embodiment of the present invention.

[0038] Figure 6 This is an installation diagram of an embodiment of the present invention used for two beams connected in a T-shape.

[0039] The correspondence between the numbers in the attached diagram is as follows:

[0040] 1-First beam; 2-Second beam; 3-Standardization device; 301-Base plate; 302-Side plate; 303-Connecting groove; 304-First ear plate; 305-Second ear plate; 306-Pulley rod; 307-Fixing nut; 308-Slide rod; 309-Slide groove; 310-Clamping piece; 311-Square steel. Detailed Implementation

[0041] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Please see Figures 1 to 6As shown, this invention provides a BIM-based precast beam cast-in-place section formwork sealing standardization device. The precast beam includes two beams arranged perpendicularly to each other (in this embodiment, the first beam 1 and the second beam 2). The cast-in-place section is located at the connection of the two beams. The standardization device 3 includes a base plate 301, two side plates 302 for clamping on opposite sides of one of the beams (in this embodiment, the first beam 1), and multiple tie rods 306. The base plate 301, the two side plates 302, and the multiple tie rods 306 are all parametrically designed using BIM technology for factory standardization processing. The base plate 301 is placed at the bottom of the connection between the two beams (in this embodiment, the first beam 1 and the second beam 2). Two side plates 302 are vertically mounted on the base plate 301 and can slide relative to the base plate 301 so that the distance between the two side plates 302 is adapted to the width of the first beam 1. At least one side plate 302 has a connecting groove 303 at the position corresponding to the second beam 2. Multiple first ear plates 304 are fixedly connected to the outer side of the connecting groove 303 perpendicular to the plate surface of the side plate 302. The multiple first ear plates 304 form a placement space for the end of the second beam 2 near the connection point to be placed and supported. The multiple first ear plates 304 are integrally formed with the corresponding side plates 302. Multiple tie rods 306 are used to pass through the beam (the first beam 1 in this embodiment) sandwiched between the two side plates 302 and fix the two side plates 302 to the opposite sides of the beam (the first beam 1 in this embodiment).

[0043] Furthermore, in this embodiment, the cross-sectional dimension of the base plate 301 is larger than that of the cast-in-place section, and the top of the side plate 302 is flush with the top of the two beams. Preferably, both ends of each tie rod 306 along its length pass through the corresponding side plate 302 and are fixedly connected to the corresponding side plate 302 by fixing nuts 307. It should be noted that in this embodiment, a square steel 311 is fixedly connected to one side of each side plate 302 opposite to the connection point. The tie rod 306 passes through the side plate 302, and the square steel 311 is fixed to the side plate 302 by clamps 310 and fixing nuts 307. The square steel 311 is a square steel tube with a specification of 50mm*50mm (cross-sectional width*height) and is welded to the side plate 302 to form an integral part.

[0044] Furthermore, in this embodiment, each side plate 302 is fixedly connected to a second ear plate 305 on its outer bottom side. A sliding rod 308 is provided between the second ear plate 305 and the bottom plate 301. The first end of the sliding rod 308 is fixedly connected to the corresponding second ear plate 305, and the second end is slidably connected to the bottom plate 301. The bottom plate 301 has a groove 309 for the second end of the sliding rod 308 to slide in. It should be noted that in this embodiment, the bottom plate 301, side plate 302, first ear plate 304, and second ear plate 305 are all made of steel plate. The sliding rod 308 uses an M12 bolt, and the head of the bolt is welded and fixed to the second ear plate 305 as a single unit. The width of the groove 309 is the diameter of the bolt.

[0045] This invention also provides an adjustable and standardized construction method for sealing the formwork of the cast-in-place section of a precast beam. The method uses the aforementioned standardized device to seal the formwork of the cast-in-place section of the precast beam. The construction method includes the following steps:

[0046] In BIM software, the standardized device is parametrically designed based on the height of the two precast beams and the cross-sectional dimensions of the cast-in-place section, so as to form multiple standardized devices that can be adapted to different precast beams.

[0047] A shaping device 3 is installed at the connection of two precast beams (the first beam 1 and the second beam 2 in this embodiment), and the bottom plate 301 is located at the bottom of the connection. The end of the second beam 2 near the connection is located in the connecting groove 303, thereby supporting the end through multiple first ear plates 304.

[0048] The two side plates 302 are slid relative to the bottom plate 301 to adjust the distance between the two side plates 302 so that the distance between the two side plates 302 is adapted to the width of the first beam 1 therein, and the two side plates 302 are fixed relative to each other by multiple tie rods 306.

[0049] Concrete is poured into the space enclosed by the two beams (the first beam 1 and the second beam 2 in this embodiment) near the connection point and the shaping device 3, thereby sealing the connection point.

[0050] Furthermore, after parametric design of the standardized device 3, the corresponding processing data (including processing parameters and number of units per floor) is extracted according to BIM software. The factory then performs standardized processing on different standardized devices 3. After processing, each standardized device 3 is marked and numbered so that it corresponds to the position of the corresponding precast beam cast-in-place section (marking principle: such as number PKCL1xPCL3, it indicates that the device is used at all intersections of PKCL1 and PCL3 on this floor).

[0051] Furthermore, before pouring concrete, a release agent is applied to the inside of the shaping device 3 to facilitate subsequent demolding. After the concrete is poured, it is cured and, once it reaches the design strength, the shaping device is removed and recycled for reuse.

[0052] It should be noted that in this embodiment, the standardization device 3 is divided into two types: T-shaped and cross-shaped (but not limited to these two types). That is, the two beams are connected in a cross shape or a T-shape (in actual engineering, the T-shape is mainly the intersection of a precast frame beam and a precast secondary beam or a precast secondary beam and a precast secondary beam, while the cross shape is mainly the intersection of a precast frame beam and two precast secondary beams or a precast secondary beam and two precast secondary beams). Taking the cross shape as an example, based on BIM-based parametric design, its creation method includes the following:

[0053] 1) Create a base plate steel plate model. The size of the steel plate used in base plate 301 can be varied according to the size of the cast-in-place section. Set the width parameter D1 of the cast-in-place section, where D1 = the width of the precast frame beam. Set the width parameter D of the base plate. Extend the steel plate to the edge of the precast frame beam on both sides by a fixed parameter value of 100mm. That is, the three-dimensional width D of base plate 301 is D = D1 + 100mm + 100mm. This ensures that the width of the base plate changes according to the width of the precast frame beam. Open a sliding groove channel on the base plate. Set a fixed value of 100mm from the center line of the sliding groove 309 to the edge of the base plate 301. The width of the sliding groove is 12mm.

[0054] 2) Create a side steel plate model, set the device height parameter H, H = height of the first beam, set the device length parameter L, the length of the cast-in-place section l (lowercase), extend the side plate 302 to both sides of the cast-in-place section by a fixed value of 200mm, device length L = length of cast-in-place section l + 200mm + 200mm, the side steel plate is L-shaped, the bottom is a second ear plate 305 with a length of 50mm, create an M12 bolt model, which is used as a sliding rod 308, the top of the bolt and the screw are welded and fixed to the second ear plate 305 as one piece, and tightened with a nut.

[0055] 3) Create a model of the first ear plate steel plate. Multiple first ear plates 304 steel plates are enclosed to form a U-shaped structure. Set the height parameter h and the width parameter d. h = height of the second beam and d = width of the second beam. Set the outward extension length value to a fixed value of 200mm. Multiple first ear plates 304 and side plates 305 are processed into one piece to form the main structure of the device.

[0056] 4) Create the auxiliary parts model. The main auxiliary parts are square steel 311 and tie rod 306. The cross-sectional dimensions of square steel 311 are 50mm*50mm (cross-sectional width*height), and the length is adjusted according to the length of the device.

[0057] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A BIM-based standardized device for sealing the formwork of a precast beam cast-in-place section, wherein the precast beam comprises two beam bodies arranged perpendicularly to each other, and the cast-in-place section is located at the connection point of the two beam bodies, characterized in that... The shaping device includes: A base plate, used to be placed at the bottom of the connection between the two beams; Two side plates are used to clamp onto opposite sides of one of the beams, and are vertically disposed on the base plate. They can slide relative to the base plate so that the distance between them is adapted to the width of one of the beams. At least one of the side plates has a connecting groove at the position corresponding to the other beam. A plurality of first ear plates are fixedly connected to the outside of the connecting groove perpendicular to the plate surface of the side plate. The plurality of first ear plates enclose a placement space for the end of the other beam near the connection point to be placed to support the end. Multiple tie rods are used to pass through the beam clamped between two side plates and to fix the two side plates to opposite sides of the beam; The base plate, the two side plates, and the multiple tie rods are all parametrically designed using BIM technology for standardized factory processing.

2. The BIM-based precast beam cast-in-place section formwork sealing standardization device as described in claim 1, characterized in that, The cross-sectional dimension of the base plate is larger than the cross-sectional dimension of the cast-in-place section.

3. The BIM-based precast beam cast-in-place section formwork sealing standardization device as described in claim 1, characterized in that, The top of the side plate is flush with the top of the two beams.

4. The BIM-based precast beam cast-in-place section formwork sealing standardization device as described in claim 1, characterized in that, Each of the tie rods passes through the corresponding side plate at both ends along its length and is fixedly connected to the corresponding side plate by a fixing nut.

5. The BIM-based precast beam cast-in-place section formwork sealing standardization device as described in claim 1, characterized in that, Each of the side plates is fixedly connected to a second ear plate on the outer side of the bottom. A sliding rod is provided between the second ear plate and the bottom plate. The first end of the sliding rod is fixedly connected to the corresponding second ear plate, and the second end is slidably connected to the bottom plate. A sliding groove is provided on the bottom plate for the second end of the sliding rod to slide.

6. A standardized construction method for adjusting and fixing the formwork of cast-in-place sections of precast beams, characterized in that, The construction method, which uses the standardization device described in claim 1 to seal the formwork of the cast-in-place section of the precast beam, includes the following steps: In BIM software, the standardized device is parametrically designed based on the height of the two precast beams and the cross-sectional dimensions of the cast-in-place section, so as to form multiple standardized devices that can be adapted to different precast beams. The shaping device is installed at the connection of the two precast beams, and the bottom plate is located at the bottom of the connection. The end of the other beam near the connection is located in the connecting groove, thereby supporting the end through multiple first ear plates. The two side plates are slid relative to the bottom plate to adjust the distance between the two side plates so that the distance between the two side plates matches the width of one of the beams, and the two side plates are fixed relative to each other by multiple tie rods; Concrete is poured into the ends of the two beams near the connection point and into the space enclosed by the shaping device to seal the connection point.

7. The adjustable and standardized construction method for sealing the cast-in-place section formwork of precast beams as described in claim 6, characterized in that, After parametric design of the standardized devices, the corresponding processing data is extracted based on BIM software. The factory then processes the different standardized devices in a standardized manner. After processing, each standardized device is marked and numbered so that it corresponds to the position of the corresponding precast beam cast-in-place section.

8. The adjustable and standardized construction method for sealing the cast-in-place section formwork of precast beams as described in claim 6, characterized in that, After the concrete is poured, it is cured and, once it reaches the design strength, the shaping device is removed and recycled for reuse.

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