Narrow-spacing double concrete column support formwork with rebar cage positioning and construction method

Abstract

This invention relates to concrete column construction technology, specifically to a narrow-spacing double-concrete column support formwork with rebar cage positioning and its construction method. The support formwork used in this invention is diagonally arranged, with sealing components used for diagonal fixation to achieve support of individual support units. Two sets of support areas are set within the support frame, with support side plates arranged inside these areas. The support units are positioned along the diagonal of the support area via elastic expansion joints, allowing them to automatically detach from the concrete surface diagonally during concrete curing and removal. This avoids excessive frictional contact with the concrete column surface, ensuring the quality of the concrete column. Existing narrow-spacing concrete column support formwork cannot guarantee side quality, and the rebar cage inside the concrete column cannot be accurately positioned, especially lacking a positioning structure at the top of the rebar cage, leading to poor concrete column quality.

Description

Technical Field

[0001] This invention relates to concrete column construction technology, specifically to a narrow-spacing double concrete column support formwork with a steel cage positioning system and its construction method. Background Technology

[0002] Concrete foundation cap structures typically contain multiple sets of double short column structures. This type of double short column structure is very common during construction. The distance between two adjacent short columns is generally 15 to 20 centimeters. The two short columns usually need to be poured at the same time. Ordinary formwork installation and subsequent dismantling are not easy, and the construction quality is difficult to guarantee.

[0003] A search of CN108867398A reveals a construction method for ultra-small spacing double-limb piers in bridge construction, comprising the following steps: S1: scaffolding erection; S2: rebar welding and tying; S3: formwork fabrication and installation; S4: formwork positioning; S5: hoisting formwork A and formwork B to their installation positions using a tower crane, positioning formwork A and formwork B on the outside of the pier rebar, connecting formwork A and formwork B together, with two sets of partitions interlocked, the partitions located in the gap between the double-limb piers; S6: positioning formwork A and formwork B with positioning pins and connecting with bolts; S7: pouring concrete; S8: concrete curing; S9: formwork removal. While this technology can achieve narrow-spacing pouring support, it only allows for front and rear formwork removal, which can still cause damage to the sides of the concrete column, resulting in uncontrollable surface quality. Furthermore, this technology lacks rebar cage positioning, meaning that the top of the rebar cage cannot be guaranteed to remain in place when using this support structure. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0005] Narrow-spacing double concrete column support formwork with rebar cage positioning includes:

[0006] The support frame has a partition plate in the middle, which divides the interior of the support frame into two support areas. The top of the support frame is fixedly installed with lifting lugs and the bottom is installed with fixing ear plates, which are suitable for fixed installation on the ground.

[0007] Support side plates are provided in two sets, each located within the corresponding support area. Each set of support side plates includes two symmetrically arranged support units. Elastic expansion joints are provided on the outer side of the support units. The free ends of the elastic expansion joints are fixed to the support frame or partition plate. Connecting ears are provided on the free ends of the support units. Sealing members are installed on the connecting ears at the corresponding free ends of the two support units. The sealing members are suitable for sealing the free end positions of the support units.

[0008] The rebar cage positioning component includes a socket structure vertically inserted into the top of the support unit, and the socket structures on the two support units are symmetrically distributed.

[0009] More specifically, the elastic telescopic component includes two elastic telescopic rods, one end of which is fixedly installed on the outside of the support unit and the other end is fixedly installed on the support frame or partition plate. The elastic telescopic rod includes a fixed part and a movable part, which are flexibly installed by springs.

[0010] More specifically, the sealing element includes:

[0011] The corner support body has connecting plates at both ends, and the connecting plates have connecting holes suitable for bolt installation onto the corresponding connecting lugs.

[0012] Rubber sheeting is fixedly installed on the side of the corner support body opposite the concrete column.

[0013] An adjusting screw is rotatably installed in the middle of the corner support body, with one end located on the outside of the corner support body and the other end located on the inside of the corner support body. A screw sleeve is installed on the adjusting screw on the inside side, and the screw sleeve and the adjusting screw are threadedly connected. A pressure applying body is symmetrically installed on the screw sleeve. The pressure applying body includes a first extrusion rod and a second extrusion rod. One end of the first extrusion rod and the second extrusion rod are rotatably installed on the screw sleeve, and the other end is rotatably installed with a pressure roller. The pressure roller is suitable for pressing the rubber sheet onto the end of the support side plate.

[0014] More specifically, the connecting holes on the connecting plate have an oblong shape.

[0015] More specifically, the socket structure is a socket rod with a socket plug on it, and the socket plug is inserted into the steel cage located above the concrete short column casting surface.

[0016] More specifically, the support template also includes an anti-sway component, which includes a fixing plate disposed on the outside of the support frame, the fixing plate and the corresponding fixing column are connected and fixed, and a reel and a servo motor suitable for driving the reel to rotate are installed on the fixing plate. A connecting rope is wound on the reel, and the free end of the connecting rope is connected to the outer wall of the support frame.

[0017] More specifically, a plug is connected to the end of the connecting rope, and a connector is fixedly installed on the support frame. The connector is provided with a connecting groove, and guide groove one, guide groove two, and locking groove are provided on the two side walls of the connecting groove. The inlet of guide groove one and the outlet of guide groove two are both open. The two ends of the locking groove are adapted to connect the roots of guide groove one and guide groove two. A connector adapted to fit guide groove one, guide groove two, and locking groove is installed on the plug. An elastic body is installed inside the connecting groove and is adapted to abut the end of the plug. The elastic body is an elastic telescopic rod and the free end is a ball head structure. A vertically arranged guide groove is provided on the side of the plug facing the elastic body. The guide groove and the ball head structure are adapted.

[0018] More specifically, the locking groove gradually deviates outward from top to bottom and then gradually approaches inward. When the bottom of the support frame is level with the top of the concrete column, the connecting rope and the lower half of the locking groove are vertically arranged.

[0019] The construction method for narrow-spacing double concrete column support formwork with rebar cage positioning is as follows:

[0020] Step 1: Laying out the location

[0021] Set up a leveling layer in the foundation pit to ensure that the bottom of the support side plate is sealed and adhered to the leveling layer, and mark the installation edge line of the support frame and fixed ear plate. Tie the concrete column steel cage within the installation edge line area.

[0022] Step 2: Formwork hoisting

[0023] The formwork is lifted by hooking the lifting lugs on the top of the support frame with the lifting equipment and placed directly above the installation edge line of the support frame and the fixed lug plate. Then it is lowered vertically onto the leveling layer.

[0024] Step 3: Template Installation

[0025] The corresponding connecting ears of the support unit are connected, fixed and sealed by the sealing component, and the top of the steel cage positioning component of the support side plate is corrected by the socket structure.

[0026] The ear plate is fixed to the leveling layer by anchor bolts, and the gap between the leveling layer and the bottom of the support side plate is sealed with sealing tape.

[0027] Install connectors at an appropriate height on the side of the support side plate. The plug head enters the locking groove through the guide groove using the connector head and is temporarily restricted inside the locking groove by the elastic body. Install a fixing plate on the leveling layer at the bottom of the foundation pit and tighten the connecting rope by the servo motor.

[0028] Tighten the bolts on the connecting plate to secure the corner support body to the connecting lug. Adjust the adjusting screw to move the screw sleeve a short distance close to the corner joint, ensuring that the rubber is pressed and fixed to the connecting lug by the extrusion rod one and extrusion rod two through the pressure roller.

[0029] Step 4: Pouring

[0030] Concrete is poured into the area enclosed by the support side plate and sealing parts. The internal concrete is treated by vibration. Then, the adjusting screw drives the screw sleeve to gradually approach the corner joint, and the pressure roller drives the concrete between the rubber and the connecting ear to be pressed back into the internal area of ​​the concrete column. After the concrete column has initially set, it is cured.

[0031] Step 5: Demolding

[0032] After the concrete column reaches the design strength, adjust the adjusting screw in the opposite direction, and gradually move the pressure roller away from the corner joint until it is reset. Release the bolts on the connecting plate to remove the sealing piece from the connecting lug.

[0033] The hoisting equipment re-hooks the lifting lugs and gradually moves away from the frame. During the movement, the servo motor drives the reel to gradually release the connecting rope, ensuring the verticality of the frame during movement and preventing it from contacting the concrete column. When the bottom of the frame is level with the top of the concrete column, the connecting rope and the lower half of the locking groove are vertically arranged. The servo motor slows down the release of the connecting rope and ensures that the connector on the plug moves along the locking groove into the guide groove. As the frame continues to move away, the plug and connector are separated.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The support template used in this invention is arranged diagonally, and the diagonal fixing is completed by sealing components to realize the support work of the support unit. Two sets of support areas are set in the support frame. The support side plates are arranged inside the support area. The support unit is set along the diagonal of the support area by elastic expansion members, so that the support unit can automatically move outward along the diagonal and detach from the concrete surface when the concrete is cured and removed, avoiding excessive frictional contact with the concrete column surface and ensuring the quality of the concrete column.

[0036] The support template used in this invention is equipped with a steel cage positioning component at the top, which is suitable for supporting and positioning the top of the steel cage to prevent shaking during concrete pouring and ensure concrete quality.

[0037] Through years of field practice, the inventors discovered that mortar leakage at the corner joints during concrete column pouring can easily cause surface defects. Therefore, in order to prevent mortar leakage, a sealing component was added to the corner joints to ensure that no mortar leakage occurs, based on the aforementioned quick assembly and disassembly of the support formwork. At the same time, the waist-shaped hole on the connecting plate is suitable for relative position adjustment of the support side plate connected to it, ensuring that the corner support anti-leakage component is also adjusted when the support side plate is adjusted relative to the frame.

[0038] The inventors discovered through on-site implementation that while the support formwork can be quickly assembled and disassembled, it is prone to swaying during hoisting, causing collisions between the support formwork and the concrete column surface. Therefore, anti-sway components are installed on the outside of the frame to ensure the state of the support formwork during hoisting. The support formwork can also automatically detach after being hoisted to a height higher than the concrete column.

[0039] Secondly, this device is specially designed for double concrete column structures. During demolding, it first expands outward and then lifts vertically upward, which is significantly different from the previous support structures that were generally demolished directly outward. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0041] Figure 2 This is a cross-sectional view of the elastic support member of the present invention;

[0042] Figure 3 This is a schematic diagram of the overall structure of the support frame of the present invention;

[0043] Figure 4 This is a schematic diagram of the overall structure of the connector of the present invention;

[0044] Figure 5 This is a diagram showing the connection relationship between the plug and the connector of the present invention;

[0045] Figure 6 This is a diagram showing the connection relationship between the connector and the connector of the plug of the present invention;

[0046] Figure 7 This is a diagram showing the positional state of the connecting rope and locking groove during connection according to the present invention;

[0047] Figure 8 This is a diagram showing the position of the connecting rope and locking groove of the present invention at the critical point of disengagement.

[0048] Figure 9 This is a schematic diagram of the overall structure of another embodiment of the present invention;

[0049] Figure 10 for Figure 9Enlarged view of the structure of the middle sealing component;

[0050] Figure 11 This is a schematic diagram of the steel cage positioning component in this invention;

[0051] Figure 12 This is a schematic diagram of a partial end structure of the corner support body in this invention.

[0052] In the diagram: 2. Support frame; 21. Connector; 211. Connecting groove; 212. Guide groove one; 213. Guide groove two; 214. Locking groove; 215. Elastic body; 4. Divider plate; 5. Lifting lug; 6. Fixing lug plate; 7. Elastic telescopic component; 71. Elastic telescopic rod; 711. Fixing part; 712. Moving part; 8. Corner support body; 81. Connecting plate; 82. Rubber; 83. Adjusting screw; 84. Screw sleeve; 85. Extrusion rod one; 86. Extrusion rod two; 87. Pressure roller; 88. Connecting hole; 9. Fixing plate; 91. Reel; 92. Servo motor; 93. Connecting rope; 94. Plug; 941. Connecting head; 942. Guide groove; 11. Support unit; 111. Connecting lug; 12. Sealing component; 13. Rebar cage positioning component. Detailed Implementation

[0053] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0054] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] Example 1

[0056] like Figures 1 to 2 and Figure 11 As shown, the narrow-spacing double concrete column support formwork with reinforcement cage positioning includes:

[0057] The support frame 2 has a partition plate 4 in the middle, which divides the interior of the support frame 2 into two support areas. The top of the support frame 2 is fixedly installed with a lifting lug 5 and the bottom is fixed with a fixing ear plate 6, which is suitable for being fixedly installed on the ground.

[0058] Support side plates are provided in two sets and are located in the corresponding support areas. Each set of support side plates includes two symmetrically arranged support units 11. An elastic expansion member 7 is provided on the outside of the support unit 11. The free end of the elastic expansion member 7 is fixed on the support frame 2 or the partition plate 4. A connecting ear 111 is provided on the free end of the support unit 11. A sealing member 12 is installed on the connecting ear 111 at the corresponding free ends of the two support units 11. The sealing member 12 is suitable for sealing the free end position of the support unit 11.

[0059] The reinforcing cage positioning component 13 includes a socket structure vertically inserted into the top of the support unit 11. The socket structures on the two support units 11 are symmetrically distributed. The socket structure is a socket rod, and one end of the socket rod is provided with a socket plug. Figure 11 As shown, the other end of the connector is equipped with a U-shaped insert plate for vertically inserting into the reinforcing cage located above the concrete short column casting surface.

[0060] Among them, the elastic telescopic component 7 includes two elastic telescopic rods 71. One end of the two elastic telescopic rods 71 ​​is fixedly installed on the outside of the support unit 11, and the other end is fixedly installed on the support frame 2 or the partition plate 4. The elastic telescopic rod 71 includes a fixed part 711 and a movable part 712. The fixed part 711 and the movable part 712 are flexibly installed by springs.

[0061] In this embodiment, the sealing element 12 can be a bolt.

[0062] The support side plates are assembled from top to bottom, and the connecting parts used for assembly are bolts.

[0063] In use, multiple support side plates that meet the elevation of the short concrete column are assembled vertically and horizontally, and the support frame 2 and the support side plates are connected and fixed by elastic expansion joints 7.

[0064] The support frame 2 is lifted to the predetermined position by hooking the lifting lug 5 with the hoisting equipment. Then, the connecting lugs 111 of the support units 11 inside the two support areas are connected and fixed by the sealing member 12, and their free ends are sealed. When the two support units 11 approach each other, the steel cage positioning member 13 at the top of the support side plate will be corrected by the socket support structure to ensure that the steel cage will not shift during concrete pouring and to ensure concrete quality. When dismantling the formwork, the sealing member 12 is released, so that the support unit 11 automatically moves outward under the action of the elastic expansion member 7. The outward movement route is in the diagonal direction of the support area, causing the support side plate to expand outward, and then it can be lifted away by the hoisting equipment.

[0065] The following improvements are made based on the above embodiments, such as... Figures 9 to 10 , Figure 12 As shown, the sealing component 12 includes:

[0066] An angle support body 8 has connecting plates 81 at both ends, and connecting holes 88 on the connecting plates 81 are suitable for installation on the corresponding connecting lugs 111 by bolts.

[0067] Rubber sheet 82 is fixedly installed on the side of the corner support body 8 opposite to the concrete column;

[0068] An adjusting screw 83 is rotatably mounted in the middle of the corner support body 8, with one end located on the outside of the corner support body 8 and the other end located on the inside of the corner support body 8. A screw sleeve 84 is mounted on the adjusting screw 83 located on the inside. The screw sleeve 84 and the adjusting screw 83 are threadedly connected. A pressure applying body is symmetrically mounted on the screw sleeve 84. The pressure applying body includes a first extrusion rod 85 and a second extrusion rod 86. One end of the first extrusion rod 85 and the second extrusion rod 86 are rotatably mounted on the screw sleeve 84, and the other end is rotatably mounted with a pressure roller 87. The pressure roller 87 is suitable for pressing the rubber sheet 82 onto the end of the support side plate.

[0069] The connecting hole 88 on the connecting plate 81 can be a waist-shaped structure or a threaded hole.

[0070] When the sealing component 12 and the connecting ear 111 are connected and fixed, the two support units 11 are brought close to each other at the same time. After they are in contact, the corner support body 8 is fixed to the corresponding connecting ear 111 by bolts, thereby ensuring the sealing. The corner support body 8 is tightened to the connecting ear 111 by adjusting the bolts on the connecting plate 81. The adjusting screw 83 drives the screw sleeve 84 to move a short distance close to the corner gap, ensuring that the rubber 82 is pressed and fixed to the connecting ear 111 by the extrusion rod 1 85 and extrusion rod 2 86 through the pressure roller 87, towards the support side plate and the sealing component. 12. Concrete is poured inside the enclosed area. The internal concrete is treated by vibration. Then, the adjusting screw 83 drives the screw sleeve 84 to gradually approach the corner joint, driving the pressure roller 87 to press the concrete between the rubber sheet 82 and the connecting ear 111 back into the internal area of ​​the concrete column. After the concrete column has initially set, it is cured. After the concrete column strength reaches the design requirements, the adjusting screw 83 is adjusted in the opposite direction, and the pressure roller 87 is gradually moved away from the corner joint until it is reset. The bolts on the connecting plate 81 are released to detach the sealing part 12 from the connecting ear 111.

[0071] The following improvements are made based on the above embodiments, such as... Figures 1 to 8 As shown, the support template also includes an anti-sway component, which includes a fixing plate 9 disposed on the outside of the support frame 2. The fixing plate 9 is connected and fixed to the corresponding fixing column. A reel 91 and a servo motor 92 suitable for driving the reel 91 to rotate are installed on the fixing plate 9. A connecting rope 93 is wound on the reel 91, and the free end of the connecting rope 93 is connected to the outer wall of the support frame 2.

[0072] A plug 94 is connected to the end of the connecting rope 93. A connector 21 is fixedly installed on the support frame 2. The connector 21 is provided with a connecting groove 211. Guide groove 1 212, guide groove 213 and locking groove 214 are provided on the two side walls of the connecting groove 211. The inlet of guide groove 1 212 and the outlet of guide groove 213 are both open. The two ends of the locking groove 214 are adapted to connect the roots of guide groove 1 212 and guide groove 213. The plug 94 is equipped with a connector 941 that is adapted to fit guide groove 1 212, guide groove 213, and locking groove 214. An elastic body 215 is installed inside the connector 211 and is adapted to abut the end of the plug 94. The elastic body 215 is an elastic telescopic rod and the free end is a ball head structure. A vertically arranged guide groove 942 is provided on the side of the plug 94 facing the elastic body 215. The guide groove 942 is adapted to the ball head structure.

[0073] The locking groove 214 gradually deviates outward from top to bottom and then gradually approaches inward. When the bottom of the support frame 2 is level with the top of the concrete column, the connecting rope 93 and the lower half of the locking groove 214 are vertically arranged.

[0074] In use, the plug 94 at the free end of the connecting rope 93 is inserted into the interior through the connector 941 along the guide groove 212, gradually squeezing the elastic body 215 until it enters the locking groove 214. The plug 94 is released, allowing it to enter the middle under the action of the elastic body 215. During this process, the ball head structure will undergo vertical displacement along the guide groove 942. This process occurs after the support frame 2 and the fixed column 2 are fixedly installed. When the support template is lifted away, the servo motor 92 will work simultaneously to drive the reel 91 to release an equal amount of connecting rope 93. When the bottom of the support frame 2 is level with the top of the concrete column, the connecting rope 93 and the lower half of the locking groove 214 are vertically arranged. As the lifting continues, the servo motor 92 will release the connecting rope 93 a short distance, ensuring that the connecting rope 93 pulls the connector 941 to continue moving down the lower half of the locking groove 214 until it enters the guide groove 213, until the plug 94 is completely separated from the connector 21.

[0075] The construction method for narrow-spacing double concrete column support formwork with rebar cage positioning is as follows:

[0076] Step 1: Laying out the location lines

[0077] Set up a leveling layer in the foundation pit to ensure that the bottom of the support side plate is sealed and attached to the leveling layer, and mark the installation edge line of the support frame 2 and the fixed ear plate 6. Tie the concrete column steel cage within the installation edge line area.

[0078] Step 2: Formwork hoisting

[0079] The formwork is lifted to the position directly above the installation edge line of the support frame 2 and the fixed ear plate 6 by hooking the lifting lug 5 at the top of the support frame 2 with the lifting equipment, and then vertically lowered onto the leveling layer;

[0080] Step 3: Template Installation

[0081] The corresponding connecting ears 111 of the support unit 11 are connected, fixed and sealed by the sealing member 12, and the top of the steel cage positioning member 13 of the support side plate is corrected by the socket structure.

[0082] The ear plate 6 is fixed to the leveling layer by anchor bolts, and the gap between the leveling layer and the bottom of the support side plate is sealed with sealing tape.

[0083] A connector 21 is installed at an appropriate height on the side of the support side plate. The plug 94 enters the locking groove 214 through the guide groove 212 via the connector 941 and is temporarily restricted inside the locking groove 214 by the elastic body 215. A fixing plate 9 is installed on the leveling layer at the bottom of the pit, and the connecting rope 93 is tightened by the servo motor 92.

[0084] Tighten the bolts on the connecting plate 81 to secure the corner support body 8 to the connecting ear 111. Adjust the adjusting screw 83 to drive the screw sleeve 84 to approach the corner gap in a short distance, ensuring that the rubber 82 is pressed and fixed to the connecting ear 111 by the extrusion rod 1 85 and extrusion rod 2 86 through the pressure roller 87.

[0085] Step 4: Pouring

[0086] Concrete is poured into the area enclosed by the support side plate and the sealing component 12. The internal concrete is treated by vibration. Then, the adjusting screw 83 drives the screw sleeve 84 to gradually approach the corner joint, and the pressure roller 87 drives the concrete between the rubber 82 and the connecting ear 111 to be pressed back into the internal area of ​​the concrete column. After the concrete column has initially set, it is cured.

[0087] Step 5: Demolding

[0088] After the concrete column reaches the design strength, adjust the adjusting screw 83 in the opposite direction, and gradually move the pressure roller 87 away from the corner until it is reset. Release the bolts on the connecting plate 81 to remove the sealing piece 12 from the connecting ear 111.

[0089] The hoisting equipment re-hooks the lifting lug 5 and gradually moves away from the support frame 2. During the movement, the servo motor 92 drives the reel 91 to gradually release the connecting rope 93, ensuring the verticality of the support frame 2 during movement and preventing it from contacting the concrete column. When the bottom of the support frame 2 is level with the top of the concrete column, the lower half of the connecting rope 93 and the locking groove 214 are vertically arranged. The servo motor 92 slows down the release of the connecting rope 93 and ensures that the connector 941 on the plug 94 moves along the locking groove 214 into the guide groove 213. As the support frame 2 continues to move away, the plug 94 and the connector 21 are separated.

[0090] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A narrow-spacing double concrete column support formwork with reinforcing cage positioning, characterized in that, include: The support frame (2) has a partition plate (4) in the middle. The partition plate (4) divides the interior of the support frame (2) into two support areas. The top of the support frame (2) is fixedly installed with a lifting lug (5) and the bottom is fixed with a fixing ear plate (6). The fixing ear plate (6) is suitable for fixed installation on the ground. Support side plates are provided in two sets and are located in the corresponding support areas. Each set of support side plates includes two symmetrically arranged support units (11). An elastic expansion member (7) is provided on the outside of the support unit (11). The free end of the elastic expansion member (7) is fixed on the support frame (2) or the partition plate (4). The free end of the support unit (11) is provided with a connecting ear (111). A sealing member (12) is installed on the connecting ear (111) at the corresponding free end of the two support units (11). The sealing member (12) is suitable for sealing the free end position of the support unit (11). The steel cage positioning component (13) includes a socket structure vertically inserted into the top of the support unit, and the socket structures located on the two support units (11) are symmetrically distributed. The socket structure is a socket rod with a socket plug on it, and the socket plug is inserted into the steel cage located above the concrete short column casting surface. The support template also includes an anti-sway component, which includes a fixing plate (9) set on the outside of the support frame (2), the fixing plate (9) and the corresponding fixing column are connected and fixed, and a reel (91) and a servo motor (92) suitable for driving the reel (91) to rotate are installed on the fixing plate (9), a connecting rope (93) is wound on the reel (91), and the free end of the connecting rope (93) is connected to the outer wall of the support frame (2); A connector (21) is fixedly installed on the support frame (2). A connecting slot (211) is provided on the connector (21). A guide slot 1 (212), a guide slot 2 (213) and a locking slot (214) are provided on the two side walls of the connecting slot (211). The inlet of the guide slot 1 (212) and the outlet of the guide slot 2 (213) are both open. The two ends of the locking slot (214) are suitable for connecting the roots of the guide slot 1 (212) and the guide slot 2 (213). The end of the connecting rope (93) is connected to a plug (94). The plug (94) is equipped with a connector (941) that is compatible with the guide groove (212), the guide groove (213), and the locking groove (214). An elastic body (215) is installed inside the connecting groove (211) and the elastic body (215) is suitable for abutting the end of the plug (94). The elastic body (215) is an elastic telescopic rod and the free end is a ball head structure. A vertically arranged guide groove (942) is provided on the side of the plug (94) facing the elastic body (215). The guide groove (942) is compatible with the ball head structure. The locking groove (214) gradually deviates outward from top to bottom and then gradually approaches inward. When the bottom of the support frame (2) is level with the top of the concrete column, the lower half of the connecting rope (93) and the locking groove (214) are vertically arranged.

2. The narrow-spacing double concrete column support formwork with reinforcing cage positioning according to claim 1, characterized in that, The elastic telescopic component (7) includes two elastic telescopic rods (71). One end of the two elastic telescopic rods (71) is fixedly installed on the outside of the support unit (11), and the other end is fixedly installed on the support frame (2) or the partition plate (4). The elastic telescopic rod (71) includes a fixed part (711) and a movable part (712). The fixed part (711) and the movable part (712) are flexibly installed by springs.

3. The narrow-spacing double concrete column support formwork with reinforcing cage positioning according to claim 2, characterized in that, The sealing element (12) includes: An angle support body (8) is provided with connecting plates (81) at both ends of the angle support body (8). The connecting plates (81) are provided with connecting holes (88) suitable for bolt installation on the corresponding connecting ears (111). Rubber sheet (82) is fixedly installed on the side of the corner support body (8) opposite to the concrete column; Adjusting screw (83) is rotatably installed in the middle of the corner support body (8), with one end located on the outside of the corner support body (8) and the other end located on the inside of the corner support body (8). A screw sleeve (84) is installed on the adjusting screw (83) located on the inside. The screw sleeve (84) and the adjusting screw (83) are threadedly connected. A pressure body is symmetrically installed on the screw sleeve (84). The pressure body includes a first extrusion rod (85) and a second extrusion rod (86). One end of the first extrusion rod (85) and the second extrusion rod (86) are rotatably installed on the screw sleeve (84), and the other end is rotatably installed with a pressure roller (87). The pressure roller (87) is suitable for pressing the rubber (82) onto the end of the support side plate.

4. The narrow-spacing double concrete column support formwork with reinforcing cage positioning according to claim 3, characterized in that, The connecting hole (88) on the connecting plate (81) has a waist-shaped structure.

5. A construction method for a narrow-spacing double concrete column support formwork with reinforcing cage positioning as described in claim 4, characterized in that, The construction steps are as follows: Step 1: Laying out the location lines Set up a leveling layer in the foundation pit, ensure that the bottom of the support side plate is sealed and attached to the leveling layer, and mark the position of the support frame (2) and the fixed ear plate (6) to install the edge line. Tie the concrete column steel cage within the installation edge line area. Step 2: Formwork hoisting The formwork is lifted to the position of the support frame (2) and the fixed ear plate (6) by hooking the lifting lug (5) on the top of the support frame (2) with the lifting equipment, and then vertically lowered onto the leveling layer. Step 3: Template Installation The corresponding connecting ears (111) of the support unit (11) are connected, fixed and sealed by the sealing part (12), and the top of the steel cage positioning part (13) of the support side plate is corrected by the socket structure. The ear plate (6) is fixed on the leveling layer by anchor bolts, and the bottom of the leveling layer and the support side plate is sealed with sealing tape. Install connectors (21) at an appropriate height on the side of the support side plate. The plug (94) enters the locking groove (214) through the guide groove (212) via the connector (941) and is temporarily restricted inside the locking groove (214) by the elastic body (215). Install the fixing plate (9) on the leveling layer at the bottom of the pit and tighten the connecting rope (93) by the servo motor (92). Tighten the bolts on the connecting plate (81) to the corner support body (8) on the connecting ear (111), and adjust the adjusting screw (83) to drive the screw sleeve (84) to approach the corner gap by a short distance, so that the rubber (82) is pressed and fixed on the connecting ear (111) by the first extrusion rod (85) and the second extrusion rod (86) through the pressure roller (87); Step 4: Pouring Concrete is poured into the area enclosed by the support side plate and the sealing component (12). The internal concrete is treated by vibration. Then, the adjusting screw (83) drives the screw sleeve (84) to gradually approach the corner joint, and the pressure roller (87) drives the concrete between the rubber (82) and the connecting ear (111) to be pressed back into the internal area of ​​the concrete column. After the concrete column has initially set, it is cured. Step 5: Demolding After the concrete column reaches the design strength, adjust the adjusting screw (83) in the opposite direction, and gradually move the pressure roller (87) away from the corner until it is reset. Release the bolts on the connecting plate (81) to remove the sealing piece (12) from the connecting ear (111). The hoisting equipment re-hooks the lifting lug (5) and gradually moves away from the support frame (2). During the movement, the servo motor (92) drives the reel (91) to gradually release the connecting rope (93) to ensure the verticality of the support frame (2) during movement and to prevent it from contacting the concrete column. When the bottom of the support frame (2) is level with the top of the concrete column, the lower half of the connecting rope (93) and the locking groove (214) are vertically arranged. The servo motor (92) slows down the release of the connecting rope (93) and ensures that the connector (941) on the plug (94) moves along the locking groove (214) to the inside of the guide groove (213). As the support frame (2) continues to move away, the plug (94) and the connector (21) are separated.

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