Prefabricated column turner and construction method thereof

Abstract

The application discloses a prefabricated stand column turnover frame and a construction method thereof, and belongs to the field of construction technology.The prefabricated stand column turnover frame comprises a supporting part and a reinforcing part, the supporting part is internally provided with a movable cavity, the reinforcing part is located in the movable cavity and is connected to the supporting part, the lower end of the supporting part is provided with a first opening, and the first opening is in communication with the movable cavity.The construction method comprises the following steps: S1, reserved steel bars of the prefabricated stand column are extended into the movable cavity through the opening; and S2, the prefabricated stand column is vertically turned over by a crane, so that the main stress point of the prefabricated stand column is supported by the prefabricated stand column turnover frame.The construction method can fully exert the effect of the equivalent hinge point of the prefabricated stand column, ensure the rapid turnover of the prefabricated stand column, improve the construction efficiency, overcome the defects that the stress point of the prefabricated stand column in the prior art is not clear, the prefabricated stand column is prone to overturning, the concrete is damaged, the steel bars are exposed and the like, improve the durability of the overall structure, and is safe and reliable, thereby guaranteeing the life safety of construction workers.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering, and in particular to a prefabricated column tilting frame and its construction method. Background Technology

[0002] In the field of bridge engineering, the mainstream structure currently used is the precast assembled bridge structure. During construction, precast columns are required. When flipping the precast column, it is necessary to first place the precast column horizontally on the cushioning cloth roll. The cushioning cloth roll is placed on the ground with good foundation or on the roadbed box slab. Then, a crane is installed at the top lifting point of the precast column. The precast column is lifted by the crane for flipping. At this time, the weight of the precast column is applied to the lowest edge flipping point of the precast column. Traditionally, there are no exposed embedded steel bars at the flipping point of the precast column.

[0003] Based on the circumferential joint precast column structure disclosed in patent CN108999077A, exposed embedded steel bars are provided, and a recessed section is set at the end of the precast column to ensure the stability of the force during hoisting and positioning. However, even so, if the traditional precast column flipping method is used, there are still defects such as unclear stress points and easy overturning of the precast column during flipping. At the same time, it also leads to problems such as easy damage to the reserved steel bars at the end of the precast column and the concrete of the recessed section, as well as exposed steel bars. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art, such as unclear stress point when precast columns are rotated, easy overturning, damage to concrete, and exposed reinforcement, and to provide a precast column rotation frame and its construction method.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A construction method for a precast column tilting frame, wherein the precast column tilting frame includes a support component and a reinforcing component, the support component has a movable cavity, the reinforcing component is located in the movable cavity and connected to the support component, and the lower end of the support component is provided with a first opening, the first opening being connected to the movable cavity;

[0007] The construction method includes the following steps:

[0008] S1. The pre-reserved reinforcing bars of the precast column extend into the movable cavity through the opening;

[0009] S2. The precast column is vertically flipped using a crane so that the main stress point of the precast column is supported by the precast column flipping frame.

[0010] This solution employs a construction method that involves inserting the pre-reserved reinforcing bars of the precast columns into the movable cavity through an opening, and then using a crane to vertically flip the precast columns. This method fully utilizes the equivalent hinge support of the precast columns, ensuring rapid flipping and improving construction efficiency. Simultaneously, it overcomes the shortcomings of existing technologies, such as unclear stress points during flipping, susceptibility to overturning, concrete damage, and exposed reinforcing bars. This improves the overall structural durability, ensures safety and reliability, and protects the lives of construction workers.

[0011] Preferably, the supporting component includes an inner steel plate, an outer steel plate, a bottom steel plate, and a top steel plate connected in sequence, which together form the movable cavity. The reinforcing component is a cross-shaped steel plate, and the first opening is provided below the inner steel plate.

[0012] Specifically, step S2 is as follows:

[0013] During the flipping process, the main stress point gradually changes from the junction of the bottom steel plate and the outer steel plate to the junction of the top steel plate and the inner steel plate;

[0014] When the stress point of the precast column tilting frame and the center of mass of the precast column are aligned in the vertical direction, the tilting speed of the precast column is reduced to decrease the swaying amplitude.

[0015] In this solution, step S2 specifically includes controlling the force points during the flipping process and controlling the speed during the flipping process to reduce the swaying amplitude, further clarifying some details that occur during the flipping process and improving the overall efficiency of the flipping process.

[0016] Preferably, the prefabricated column has a buffer cloth roll at its front end and a core block at its bottom. The following steps are also included after step S1 and before step S2:

[0017] S3. A buffer layer is provided on the top steel plate and the inner steel plate where the prefabricated column tilting frame contacts the core block. The buffer layer can be glued with rubber.

[0018] S4. The buffer cloth roll is placed adjacent to the outer steel plate, directly below the precast column after it has been flipped over, so that the precast column can be pressed onto the buffer cloth roll after it has been flipped over.

[0019] S5. Install lifting devices at the lifting points at the ends of the precast columns.

[0020] In this scheme, after the precast column tilting frame is attached to the precast column, before tilting the precast column, a buffer layer is pasted on the top steel plate and the inner steel plate, a buffer cloth roll is placed, and a lifting device is installed at the lifting point at the end of the precast column. This provides sufficient preconditions for the subsequent tilting work and ensures that the tilting process is carried out smoothly and efficiently.

[0021] Preferably, the construction method further includes the following steps after S2:

[0022] S6. After the prefabricated column exceeds the instability threshold during the flipping process, the stress point is gradually transferred from the prefabricated column flipping frame to the buffer roll, and the core block gradually contacts the buffer roll.

[0023] S7. After the precast column is flipped so that the bottom surface of the core block is in vertical contact with the buffer roll, the precast column is gradually lifted using the crane.

[0024] S8. Disassemble the prefabricated column flipping frame.

[0025] In this scheme, after the precast column is flipped, the adjustment is made according to the degree of flipping. As it gradually approaches the instability critical value, the stress point is gradually transferred from the precast column to the buffer roll. At the same time, the core block also gradually contacts the buffer roll until the bottom of the core block completely contacts the buffer roll. At this time, the precast column is further lifted by a crane to facilitate the disassembly of the precast column flipping frame for easy reuse.

[0026] A precast column flipping frame is used for flipping precast columns. The precast column flipping frame includes a support component and a reinforcing component. The support component covers the reinforcing component and the reinforcing component is connected to the inner wall surface of the support component. The lower end of the support component is provided with a first opening.

[0027] The bottom of the precast column is provided with a reserved steel bar, which is snapped into the first opening to fasten the precast column flipping frame. The supporting component flips circumferentially with the precast column and provides supporting force.

[0028] In this solution, supporting and reinforcing components are installed on the precast column tilting frame. These components work together to form the main structure of the precast column tilting frame. Based on the characteristics of this structure, the main structure has strong supporting force and can play a supporting role for the precast column during the tilting process, acting as an equivalent hinge fulcrum to ensure the rapid tilting of the precast column and improve construction efficiency. At the same time, by pre-reserved steel bars are installed around the bottom of the precast column, and a first opening is made at the lower end of the supporting component, the pre-reserved steel bars can pass through the first opening to achieve interlocking, thereby fixing the precast column tilting frame to the precast column and reducing the risk of falling off. With the cooperation of the above structures, the supporting component provides supporting force when the precast column is tilted circumferentially, thus overcoming the defects of the existing technology, such as unclear stress points, easy overturning, damage to concrete, and exposed reinforcement, etc., when the precast column is tilted. This improves the overall durability of the structure, makes it safe and reliable, and protects the lives of construction workers.

[0029] Preferably, the supporting component includes an inner steel plate, an outer steel plate, a bottom steel plate, and a top steel plate connected in sequence, which together form a movable cavity. The inner steel plate is fitted against the bottom surface of the precast column, and the first opening is provided on the inner steel plate. The first opening is connected to the movable cavity, and the reserved reinforcing bar passes through the first opening and extends into the movable cavity.

[0030] In this design, the supporting components mainly consist of an inner steel plate, an outer steel plate, a bottom steel plate, and a top steel plate, which are connected in sequence to form a hollow column with a movable cavity in the middle. This cavity is connected to the first opening on the inner steel plate, providing conditions for the insertion of the pre-reserved reinforcing bars and allowing the precast column tilting frame to be smoothly engaged with the pre-reserved reinforcing bars. At the same time, the inner steel plate is fitted against the bottom surface of the precast column, ensuring that the precast column tilting frame is stably against the precast column and preventing severe shaking of the precast column tilting frame during the tilting process of the precast column.

[0031] Preferably, the reinforcing member is disposed within the movable cavity, and the reinforcing member is connected to the inner steel plate, the outer steel plate, the bottom steel plate, and the top steel plate.

[0032] In this design, the reinforcing component is placed inside the movable cavity, with a reserved space for its installation. This allows the reinforcing component to be installed within the movable cavity and connected to the inner steel plate, outer steel plate, bottom steel plate, and top steel plate. The supporting component provides support, resulting in a strong overall structure for the precast column tilting frame, which provides the necessary preconditions for better coordination of the precast column tilting.

[0033] Preferably, the reinforcing component is a cross-shaped steel plate.

[0034] In this design, the reinforcing component is a cross-shaped steel plate connected to the inner steel plate, outer steel plate, bottom steel plate, and top steel plate, providing support for the four components and improving the overall structural strength.

[0035] Preferably, the reinforcing member includes a radial plate, a second opening is provided below the radial plate, and a first opening is provided below the inner steel plate. The first opening and the second opening have the same size, and the reserved reinforcing bar is correspondingly snapped into the first opening and the second opening.

[0036] In this solution, by setting a second opening in the radial plate and a first opening in the inner steel plate, the reserved steel bars can enter through the first and second openings and be correspondingly engaged in the two openings. Finally, the main body of the reserved steel bars is placed in the movable cavity, which stabilizes the precast column flipping frame and avoids the bending and deformation of the reserved steel bars caused by gravity during the flipping process of the precast column.

[0037] Preferably, the lengths of the first opening and the second opening are less than the lengths of the cross-sections of the inner steel plate and the reinforcing member, and the heights of the first opening and the second opening are greater than twice the diameter of the reserved reinforcing bar.

[0038] In this design, the length and height of the first and second openings are set in this way, which provides sufficient space for the reserved steel bars to be smoothly inserted into the movable cavity to assist the precast column tilting frame in fastening to the precast column, thus providing a prerequisite for improving the stability of the overall structure.

[0039] Preferably, a core block is provided at the bottom of the precast column, the top steel plate of the supporting component abuts against the core block, and the inner steel plate of the supporting component abuts against the bottom of the precast column.

[0040] In this scheme, the top steel plate of the support component abuts against the core block set at the bottom of the precast column, and the inner steel plate of the support component abuts against the bottom of the precast column, so that the entire support component abuts against the precast column, which improves the stability of the fastening between the precast column and the support component, and ensures that when the precast column is rotated, the precast column rotating frame can fully play the role of the equivalent hinge fulcrum, ensuring the rapid rotation of the precast column and improving construction efficiency.

[0041] Preferably, the width of the reinforcing member is L1, the width of the bottom steel plate is L2, and the height of the core block is L3, where L1>L3 and L2>L3.

[0042] In this solution, L1 > L3 and L2 > L3. In this structural setting, after the precast column is completely flipped, it is gradually placed from the horizontal direction to the vertical direction. The precast column flipping frame acts as an equivalent hinge fulcrum, which first contacts the ground and continuously provides support force for the precast column. At this time, the widths of the cross-shaped steel plate and the bottom steel plate are set to be greater than the height of the core block, which can prevent the core block from directly contacting the ground, reduce the phenomenon of concrete rupture and exposed reinforcement on the outer surface of the core block and the precast column, improve the durability of the structure, and make the structure safe and reliable.

[0043] Preferably, the cross-sectional lengths of the inner steel plate, the outer steel plate, the bottom steel plate, and the top steel plate are L4, and the spacing between the reserved steel bars in the same row close to the inner steel plate is L5, and L4 < L5.

[0044] In this solution, L4 < L5. Such a structural setting ensures that the space reserved between the reserved steel bars is sufficient for the precast column flipping frame to be clamped to the precast column during the process, making the installation process convenient and efficient.

[0045] Preferably, the precast column further includes a lifting lug, and the lifting lug is connected to the upper end of the support member.

[0046] In this solution, the lifting lug is connected and fixed to the upper end of the support member. Construction workers can pull the precast column flipping frame through the lifting lug and gradually approach the precast column, so as to place the reserved steel bars into the movable cavity and fasten the precast column flipping frame to the bottom of the precast column.

[0047] Based on common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0048] The positive and progressive effects of the present invention are as follows: In the present invention, a construction method is adopted in which the reserved steel bars of the precast column are extended into the movable cavity through openings, and then the precast column is vertically flipped by a crane. This fully utilizes the role of the equivalent hinge fulcrum of the precast column, ensures the rapid flipping of the precast column, and improves the construction efficiency. At the same time, it overcomes the defects in the prior art such as unclear stress points, easy overturning, concrete damage, and exposed reinforcement during the flipping of the precast column, improves the durability of the overall structure, is safe and reliable, and guarantees the life safety of construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic structural diagram (one) of the precast column flipping frame according to an embodiment of the present invention.

[0050] Figure 2 It is a schematic structural diagram (two) of the precast column flipping frame according to an embodiment of the present invention.

[0051] Figure 3This is a partial schematic diagram of a prefabricated column according to an embodiment of the present invention.

[0052] Figure 4 This is a side view of a prefabricated column according to an embodiment of the present invention.

[0053] Figure 5 This is a schematic diagram of the installation of the prefabricated column tilting frame according to an embodiment of the present invention.

[0054] Figure 6 This is a schematic diagram of the flipping of the prefabricated column flipping frame according to an embodiment of the present invention.

[0055] Figure 7 This is a schematic diagram of the prefabricated column flipping frame after it has been flipped according to an embodiment of the present invention.

[0056] Explanation of reference numerals in the attached figures:

[0057] Precast columns 0

[0058] Precast column tilting frame 1

[0059] Support component 11

[0060] Inner steel plate 111

[0061] Outer steel plate 112

[0062] Bottom steel plate 113

[0063] Top steel plate 114

[0064] Reinforcing component 12

[0065] Radial plate 121

[0066] Hanging Ear 3

[0067] Reserved steel bar 4

[0068] Core Block 5

[0069] First opening 6

[0070] Second opening 7

[0071] 8 rolls of cushioning fabric

[0072] Width L1 of the reinforcing component

[0073] Width L2 of the bottom steel plate

[0074] Core block height L3

[0075] The cross-sectional length L4 of the inner steel plate, outer steel plate, bottom steel plate, and top steel plate

[0076] The spacing L5 of the reserved reinforcing bars in the same row Detailed Implementation

[0077] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described herein.

[0078] This invention discloses a prefabricated column tilting frame 1, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it is used for flipping precast column 0. The precast column flipping frame 1 includes a support component 11 and a reinforcing component 12. The support component 11 covers the reinforcing component 12, and the reinforcing component 12 is connected to the inner wall of the support component 11. The lower end of the support component 11 is provided with a first opening 6. The bottom of the precast column 0 is provided with a reserved steel bar 4. The reserved steel bar 4 is snapped into the first opening 6 to fasten the precast column flipping frame 1. The support component 11 flips circumferentially with the precast column 0 and provides support force. By setting support components 11 and reinforcing components 12 on the precast column tilting frame 1, the two cooperate to form the main structure of the precast column tilting frame 1. Based on the structural characteristics, the main structure has strong supporting force and can play a supporting role for the precast column 0 during the tilting process, acting as an equivalent hinge fulcrum, ensuring the rapid tilting of the precast column 0 and improving construction efficiency. At the same time, by setting reserved steel bars 4 around the bottom of the precast column 0, and opening a first opening 6 at the lower end of the support component 11, the reserved steel bars 4 can pass through the first opening 6 to achieve mutual interlocking, thereby fixing the precast column tilting frame 1 to the precast column 0 and reducing the risk of falling off. With the cooperation of the above structures, the support component 11 finally provides supporting force when the precast column 0 is tilted in the circumferential direction, thereby overcoming the defects of the existing technology such as unclear stress point of the precast column 0 during tilting, easy overturning, damage to concrete, and exposed reinforcement, improving the overall durability of the structure, making it safe and reliable, and ensuring the life safety of construction workers.

[0079] Specifically, in this embodiment, the precast column turning frame 1 is matched with the core block type precast bridge column 0. The precast column turning frame 1 is hollowed out at the reserved steel bar 4 and then installed at the bottom 1 / 4 recessed section of the precast column 0, thus forming an integral whole with the bottom structure of the precast column 0. The turning frame acts as an equivalent hinge fulcrum during the column turning process, ensuring the rapid turning of the precast column 0 and improving construction efficiency. It avoids the bending deformation of the reserved steel bar 4 caused by gravity during the turning of the core block type precast column 0, and at the same time reduces the cracking and exposed steel bar phenomenon of the concrete on the outer surface of the core block 5 and the precast column 0, thus improving the durability of the structure.

[0080] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the support component 11 includes an inner steel plate 111, an outer steel plate 112, a bottom steel plate 113, and a top steel plate 114 connected in sequence, which together form a movable cavity. The inner steel plate 111 is attached to the bottom surface of the precast column 0. A first opening 6 is provided on the inner steel plate 111, which is connected to the movable cavity. The reserved reinforcing bar 4 passes through the first opening 6 and extends into the movable cavity. The supporting component 11 is mainly composed of an inner steel plate 111, an outer steel plate 112, a bottom steel plate 113, and a top steel plate 114. The four are connected in sequence to form a hollow column with a movable cavity in the middle, which is connected to the first opening 6 on the inner steel plate 111. This provides conditions for the insertion of the reserved reinforcing bar 4, allowing the precast column tilting frame 1 to be smoothly engaged with the reserved reinforcing bar 4. At the same time, the inner steel plate 111 is fitted against the bottom surface of the precast column 0, so that the precast column tilting frame 1 is stably against the precast column 0, avoiding serious shaking of the precast column tilting frame 1 during the tilting of the precast column 0.

[0081] Specifically, rubber is pasted on the surface of the top steel plate 114 and the inner steel plate 111 where the prefabricated column tilting frame 1 contacts the core block 5 to act as a stress buffer layer, protect the structural surface, and prevent excessive wear.

[0082] The reinforcing component 12 is disposed within the movable cavity and is connected to the inner steel plate 111, the outer steel plate 112, the bottom steel plate 113, and the top steel plate 114. The reinforcing component 12 is disposed within the movable cavity, providing a space for its installation. This allows the reinforcing component 12 to be installed within the movable cavity and connected to the inner steel plate 111, outer steel plate 112, bottom steel plate 113, and top steel plate 114, thus providing support to the supporting component 11. This results in a strong supporting structure for the prefabricated column tilting frame 1, providing the necessary conditions for better coordination in the tilting of the prefabricated column 0.

[0083] The reinforcing component 12 is a cross-shaped steel plate. The reinforcing component 12 is set as a cross-shaped steel plate, which is connected to the inner steel plate 111, the outer steel plate 112, the bottom steel plate 113 and the top steel plate 114, providing support for the four components and improving the strength of the overall structure.

[0084] The reinforcing component 12 includes a radial plate 121. A second opening 7 is located below the radial plate 121, and a first opening 6 is located below the inner steel plate 111. The first opening 6 and the second opening 7 are of the same size, and the pre-reserved reinforcing bar 4 is correspondingly engaged in the first opening 6 and the second opening 7. By providing the second opening 7 on the radial plate 121 and the first opening 6 on the inner steel plate 111, the pre-reserved reinforcing bar 4 can enter through the first opening 6 and the second opening 7 and be correspondingly engaged in the two openings. Ultimately, the main body of the pre-reserved reinforcing bar 4 is placed within the movable cavity, thus stabilizing the precast column tilting frame 1 and preventing the precast column 0 from bending or deforming due to gravity during the tilting process.

[0085] The lengths of the first opening 6 and the second opening 7 are less than the cross-sectional lengths of the inner steel plate 111 and the reinforcing member 12, while the heights of the first opening 6 and the second opening 7 are greater than twice the diameter of the reserved reinforcing bar 4. This arrangement of the lengths and heights of the first opening 6 and the second opening 7 provides ample space for the reserved reinforcing bar 4 to smoothly extend into the movable cavity, thereby assisting the precast column tilting frame 1 in securing itself to the precast column 0, and providing a prerequisite for improving the overall structural stability.

[0086] A core block 5 is provided at the bottom of the precast column 0. The top steel plate 114 of the support component 11 abuts against the core block 5, and the inner steel plate 111 of the support component 11 abuts against the bottom of the precast column 0. By abutting the top steel plate 114 of the support component 11 against the core block 5 at the bottom of the precast column 0, and the inner steel plate 111 of the support component 11 against the bottom of the precast column 0, the support component 11 as a whole abuts against the precast column 0. This improves the stability of the fastening between the precast column 0 and the support component 11, ensuring that when the precast column 0 is rotated, the precast column rotating frame 1 can fully play the role of the equivalent hinge fulcrum, ensuring the rapid rotation of the precast column 0 and improving construction efficiency.

[0087] Specifically, the first opening 6 is aligned with the reserved steel bar 4 at the bottom of the flipped surface of the precast column 0, and then slowly and horizontally lowered to the root of the core block 5. After installation, it is necessary to ensure that it matches the cross section of the recessed core block 5 to form a tenon-and-mortise contact surface.

[0088] Specifically, a lifting device is installed at the lifting point on the top of the precast column 0, and the precast column 0 is vertically flipped by a crane. The main stress point is supported by the junction of the bottom steel plate and the outer steel plate 112. During the flipping process, the main stress point gradually changes from the junction of the bottom steel plate and the outer steel plate 112 to the junction of the top steel plate and the inner steel plate 111. After the column flipping exceeds the instability threshold, the stress point of the column weight is transferred from the flipping frame to the buffer cloth roll 8. At this time, the buffer cloth roll 8 has already contacted the bottom of the core block 5 during the flipping process, and the weight of the precast column 0 is completely borne by the buffer cloth roll 8.

[0089] likeFigure 2 and Figure 3 As shown in Figure 3 , the width of the strengthening member 12 is L1, the width of the bottom steel plate 113 is L2, and the height of the core block 5 is L3, where L1 > L3 and L2 > L3. In this structural setting, after the precast column 0 is completely flipped and gradually placed vertically from the horizontal direction, the precast column flipping frame 1 acts as an equivalent hinge support point. It first touches the ground and continuously provides support force for the precast column 0. At this time, setting the widths of the cross-shaped steel plate and the bottom steel plate 113 to be greater than the height of the core block 5 can prevent the core block 5 from directly contacting the ground, reducing the phenomenon of concrete rupture and exposed reinforcement on the outer surface of the core block 5 and the precast column 0, improving the durability of the structure, and making the structure safe and reliable.

[0090] Specifically, a buffer cloth roll 8 is placed adjacent to the outer steel plate 112 to prevent damage to the concrete of the core block 5 during flipping. The placement position is directly below the core block 5 in the retracted section after the column flipping is completed. During the flipping process of the precast column 0, its core block 5 gradually contacts the buffer cloth roll 8 to avoid being damaged. At the same time, when the precast column 0 is flipped and placed vertically as a whole, since the height of the core block 5 is greater than the widths of the strengthening member 12 and the bottom steel plate 113, and the height of the buffer cloth roll 8 after compression should be higher than the increased height of the flipping frame, at this moment, the bottom of the core block 5 is placed on the buffer cloth roll 8, and the precast column flipping frame 1 maintains a certain height from the ground, enabling the precast column flipping frame 1 to be smoothly detached, and the buffer cloth roll 8 completely bears the weight of the precast column 0, achieving a clear force-bearing effect and facilitating the disassembly of the precast column flipping frame 1 for repeated use.

[0091] As Figure 2 and Figure 3 shown in Figure 3 , the cross-sectional lengths of the inner steel plate 111, the outer steel plate 112, the bottom steel plate 113, and the top steel plate 114 are L4, and the spacing of the reserved steel bars 4 in the same row close to the inner steel plate 111 is L5, where L4 < L5. Such a structural setting ensures that the space reserved between the reserved steel bars 4 is sufficient for the precast column flipping frame 1 to be clamped to the precast column 0 during the installation process, making the installation process convenient and efficient.

[0092] Specifically, the first opening 6 and the second opening 7 of the precast column flipping frame 1 at the reserved steel bars 4 are not restricted by the spacing of the reserved steel bars 4, and at the same time, a relatively large construction error is tolerated, which is convenient for installation and removal and has strong applicability.

[0093] As Figure 1 , Figure 3 and Figure 4As shown, the precast column 0 also includes a lifting lug 3, which is connected to the upper end of the support component 11. The lifting lug 3 is connected to and fixed to the upper end of the support component 11. Construction workers can use the lifting lug 3 to pull the precast column tilting frame 1 and gradually approach the precast column 0, thereby placing the reserved steel bar 4 in the movable cavity and fastening the reserved column tilting frame to the bottom of the precast column 0.

[0094] Specifically, the lifting lugs 3 are welded to both sides of the top steel plate 114, and multiple lifting lugs 3 can be installed on both sides of the top steel plate 114.

[0095] This invention also discloses a construction method for a prefabricated column tilting frame 1, such as... Figure 5 , Figure 6 and Figure 7 As shown, the precast column tilting frame 1 includes a support component 11 and a reinforcing component 12. The support component 11 has a movable cavity, and the reinforcing component 12 is located in the movable cavity and connected to the support component 11. The lower end of the support component 11 is provided with a first opening 6, which is connected to the movable cavity. The construction method includes the following steps: S1, the reserved steel bar 4 of the precast column 0 extends into the movable cavity through the opening; S2, the precast column 0 is tilted vertically by a crane so that the main force point of the precast column 0 is supported by the precast column tilting frame 1. The construction method involves inserting the pre-reserved reinforcing bars 4 of the precast column 0 into the movable cavity through an opening, and then using a crane to vertically flip the precast column 0. This method fully utilizes the equivalent hinge support of the precast column 0, ensuring rapid flipping and improving construction efficiency. At the same time, it overcomes the defects of existing technologies, such as unclear stress points, easy overturning, concrete damage, and exposed reinforcing bars during flipping of the precast column 0. This method improves the overall structural durability, ensures safety and reliability, and protects the lives of construction workers.

[0096] like Figure 5 , Figure 6 and Figure 7 As shown, the support component 11 includes an inner steel plate 111, an outer steel plate 112, a bottom steel plate 113, and a top steel plate 114 connected in sequence, which together form a movable cavity. The reinforcing component 12 is a cross-shaped steel plate, and a first opening 6 is provided below the inner steel plate 111. In step S2, the main force point gradually changes from the junction of the bottom steel plate 113 and the outer steel plate 112 to the junction of the top steel plate 114 and the inner steel plate 111 during the flipping process. When the force point of the precast column flipping frame 1 and the center of mass of the precast column 0 are aligned in the vertical direction, the flipping speed of the precast column 0 is reduced to decrease the swaying amplitude. Step S2 specifically includes controlling the force point during the flipping process and controlling the speed during the flipping process to reduce the swaying amplitude, further clarifying some details that occur during the flipping process and improving the overall efficiency of the flipping process.

[0097] Specifically, larger lifting equipment should be selected during the overturning process to prevent adverse factors caused by the swaying of the precast columns.

[0098] like Figure 5 , Figure 6 and Figure 7 As shown, the front end of the precast column is provided with a buffer cloth roll 8, and the bottom of the precast column 0 is provided with a core block 5. After step S1 and before step S2, the following steps are also included: S3, a buffer layer is set on the top steel plate 114 and the inner steel plate 111 where the precast column flipping frame 1 contacts the core block 5. The buffer layer can be glued with rubber; S4, the buffer cloth roll 8 is placed next to the outer steel plate 112, and the placement position is directly below the precast column 0 after it is flipped, so that the precast column 0 can be pressed on the buffer cloth roll 8 after flipping; S5, a lifting device is installed at the lifting point at the end of the precast column 0. After the precast column flipping frame 1 is snapped into the precast column 0, before flipping the precast column 0, a buffer layer is glued to the top steel plate 114 and the inner steel plate 111, the buffer cloth roll 8 is placed, and a lifting device is installed at the lifting point at the end of the precast column 0. This provides sufficient preconditions for the subsequent flipping work and ensures that the flipping process is carried out smoothly and efficiently.

[0099] Specifically, in this embodiment, the buffer layer is set at the position of the top steel plate 114 and the inner steel plate 111, and is made of rubber. In other embodiments, the buffer layer can also be set at the core block 5 of the precast column 0 and other positions at the bottom of the precast column 0, so as to ensure that when the precast column 0 and the precast column flipping frame 1 come into contact, there is a buffer layer between them for protection.

[0100] like Figure 5 , Figure 6 and Figure 7 As shown, the construction method includes the following steps after S2: S6, after the precast column 0 exceeds the instability threshold during the flipping process, the stress point is gradually transferred from the precast column flipping frame 1 to the buffer cloth roll 8, and the core block gradually contacts the buffer cloth roll 8. S7, after the precast column 0 is flipped until the bottom surface of the core block 5 is in vertical contact with the buffer cloth roll 8, the precast column 0 is gradually lifted using a crane. S8, the precast column flipping frame 1 is dismantled. After the precast column 0 is flipped, the degree of flipping is adjusted. As it gradually approaches the instability threshold, the stress point is gradually transferred from the precast column 0 to the buffer cloth roll 8, and the core block 5 also gradually contacts the buffer cloth roll 8 until the bottom of the core block 5 is completely in contact with the buffer cloth roll 8. At this point, the precast column 0 is further lifted by a crane to facilitate the dismantling of the precast column flipping frame 1 for reuse.

[0101] Specifically, the prefabricated column tilting frame 1 has a high reuse rate and is economical and environmentally friendly.

[0102] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A construction method for a prefabricated column tilting frame, characterized in that, The precast column flipping frame is used for flipping precast columns. The precast column flipping frame includes a support component and a reinforcing component. The support component has a movable cavity. The reinforcing component is located in the movable cavity and connected to the inner wall of the support component. The lower end of the support component is provided with a first opening, which communicates with the movable cavity. The supporting component includes an inner steel plate, an outer steel plate, a bottom steel plate, and a top steel plate connected in sequence, which together form the movable cavity. The reinforcing component is a cross-shaped steel plate, and the first opening is provided below the inner steel plate. The prefabricated column has a core block at its bottom; The bottom of the precast column is provided with a reserved steel bar, which is snapped into the first opening to fasten the precast column flipping frame; the support component flips circumferentially with the precast column and provides support force. The inner steel plate is fitted against the bottom surface of the precast column, and the top steel plate of the supporting component abuts against the core block; The construction method includes the following steps: S1. The pre-reserved reinforcing bars of the precast column extend into the movable cavity through the first opening; S2. The precast column is vertically flipped using a crane so that the main stress point of the precast column is supported by the precast column flipping frame; Specifically, step S2 is as follows: During the flipping process, the main stress point gradually changes from the junction of the bottom steel plate and the outer steel plate to the junction of the top steel plate and the inner steel plate; When the force-bearing point of the precast column tilting frame and the center of mass of the precast column are aligned in the vertical direction, reduce the tilting speed of the precast column to reduce the swaying amplitude. The following steps are included after step S1 and before step S2: S3. A buffer layer is provided on the top steel plate and the inner steel plate where the prefabricated column tilting frame contacts the core block; S4. Place a buffer cloth roll adjacent to the outer steel plate, positioned directly below the precast column after it has been flipped over, so that the precast column can be pressed onto the buffer cloth roll after it has been flipped over. S5. Install lifting devices at the lifting points at the ends of the precast columns.

2. The construction method of the prefabricated column tilting frame as described in claim 1, characterized in that, The construction method further includes the following steps after step S2: S6. After the prefabricated column exceeds the instability threshold during the flipping process, the stress point is gradually transferred from the prefabricated column flipping frame to the buffer cloth roll, and the core block gradually contacts the buffer cloth roll. S7. After the precast column is flipped so that the bottom surface of the core block is in vertical contact with the buffer roll, the precast column is gradually lifted using the crane. S8. Disassemble the prefabricated column flipping frame.

3. The construction method of the prefabricated column tilting frame as described in claim 1, characterized in that, The reinforcing component is connected to the inner steel plate, the outer steel plate, the bottom steel plate, and the top steel plate.

4. The construction method of the prefabricated column tilting frame as described in claim 1, characterized in that, The reinforcing component includes a radial plate with a second opening below it and a first opening below the inner steel plate. The first and second openings are the same size, and the reserved reinforcing bars are correspondingly snapped into the first and second openings.

5. The construction method of the prefabricated column tilting frame as described in claim 4, characterized in that, The lengths of the first opening and the second opening are less than the lengths of the cross-sections of the inner steel plate and the reinforcing member, and the heights of the first opening and the second opening are greater than twice the diameter of the reserved reinforcing bar.

6. The construction method of the prefabricated column tilting frame as described in claim 1, characterized in that, The width of the reinforcing component is L1, the width of the bottom steel plate is L2, and the height of the core block is L3, where L1>L3 and L2>L3.

7. The construction method of the prefabricated column tilting frame as described in claim 1, characterized in that, The cross-sectional length of the inner steel plate, the outer steel plate, the bottom steel plate, and the top steel plate is L4, and the spacing of the reserved reinforcing bars in the same row closest to the inner steel plate is L5. <L5。 8. The construction method of the prefabricated column tilting frame as described in claim 1, characterized in that, The prefabricated column tilting frame also includes lifting lugs, which are connected to the upper end of the support component.

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