Narrow-spacing double-column formwork for deep foundation pit concrete caps under soft soil conditions

Abstract

This invention discloses a narrow-spacing double-column formwork for deep foundation pit concrete caps under soft soil conditions. By adopting a structural design concept of an outer frame and inner support for the support formwork, a linkage structure and adjusting components are used to adjust the inner support side plates away from and closer to the outer frame, thereby achieving short-distance fine-tuning. This facilitates the subsequent separation of the concrete columns and the rapid dismantling of the support formwork during overall hoisting. However, it is necessary to ensure the verticality during hoisting to prevent collisions with the concrete columns. Locking nuts can also be used to fix the adjusting screws to prevent the support side plates from loosening due to the impact of concrete pouring, which could lead to grout leakage.

Description

Technical Field

[0001] This invention relates to the field of building construction, specifically to a narrow-spacing double-column formwork for deep foundation pit concrete foundations under soft soil conditions. Background Technology

[0002] During the construction of deep foundation pits in soft soil, special concrete foundation cap structures are encountered within the pit. These caps typically consist of multiple sets of double-column structures. This type of double-column structure is very common during construction. The distance between adjacent columns is generally 15 to 20 centimeters, and both columns usually need to be poured simultaneously. Ordinary formwork installation and subsequent dismantling are difficult, and the construction quality is hard to guarantee. Previously, column construction mostly used structures such as CN109853945A and CN111075191A. However, this type of structure cannot be used for simultaneous construction of double columns. Due to the small distance between the two columns, it is insufficient to ensure the support and fixation of the side plates and back braces within the spacing. Furthermore, in previous double-column construction methods, leakage problems often occurred at the corners of the formwork, leading to quality issues with the concrete columns. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a narrow-spacing double-column formwork for deep foundation pit concrete caps under soft soil conditions to enable simultaneous pouring of double columns, achieve rapid assembly and disassembly, and overcome the problem of leakage at corners, thereby ensuring the quality of the double concrete columns.

[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] A narrow-spacing double-column formwork for deep foundation pit concrete caps under soft soil conditions, including support components and support side plates;

[0006] Supporting components include:

[0007] Fixed posts are used for installation on the ground;

[0008] The frame is inserted into the fixed column and fixed with nuts. A partition is set in the middle of the frame to divide the frame into two support areas. A linkage structure and an adjusting component are set on the side of the frame at the support area. The linkage structure is used to connect the support side plate. The adjusting component is threaded to the frame and set perpendicular to the support side plate. The end of the adjusting component located inside the frame is rotatably installed on the support side plate. A locking nut is threaded to the adjusting component located inside the frame. The locking nut is used to lock and fix the inner extension of the adjusting component.

[0009] The support side plate is located on the side of the concrete column and inside the support area. The support side plate is used to fit against the side of the corresponding concrete column.

[0010] More specifically, the linkage structure includes four sets of linkage bodies. Each set of linkage bodies includes a hinge seat fixed at the corner of the frame. Two symmetrically distributed linkage rods are rotatably mounted on the hinge seat. The linkage rods are elastic telescopic rods. The free ends of the two linkage rods are rotatably mounted to the corresponding support side plates. Gears are provided at both ends of the linkage rods. The two gears on the hinge seat mesh with each other, and the gear at the other end meshes with the gear on another set of linkage rods on the support side plate.

[0011] More specifically, the frame includes a main frame body and a sub-frame body. The main frame body has at least two sets of main frame bodies arranged vertically, which are the same number as the linkage structure. The bottom main frame body is equipped with a fixing ear, which has a through hole for mounting the fixing column. The top main frame body is fixed with a lifting ear. The two sets of main frame bodies are connected and fixed through the sub-frame body.

[0012] More specifically, it also includes corner support leak-proof components, which are installed at the ends of the support side plates to connect two adjacent support side plates.

[0013] More specifically, the corner support leak-proof assembly includes:

[0014] The corner support body has connecting plates at both ends, and the connecting plates have connecting holes for bolt installation onto the corresponding support side plate.

[0015] Rubber sheeting is fixedly installed on the side of the corner support body opposite the concrete column.

[0016] 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 used to press the rubber sheet onto the end of the support side plate.

[0017] More specifically, the connecting holes on the connecting plate are waist-shaped structures, which are used for the corner support body to be recessed or expanded relative to the support side plate.

[0018] More specifically, the double-column template also includes an anti-sway component, which includes a fixing plate disposed on the outside of the frame, the fixing plate and the corresponding fixing column are connected and fixed, and a reel and a servo motor 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 frame.

[0019] More specifically, a plug is connected to the end of the connecting rope, and a connector is fixedly installed on the frame. The connector has 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 used to connect the roots of guide groove one and guide groove two. A connector is installed on the plug to fit guide groove one, guide groove two, and locking groove. An elastic body is installed inside the connecting groove and is used 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 compatible.

[0020] More specifically, the locking groove gradually deviates outward from top to bottom and then gradually approaches inward. 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.

[0021] A construction technique for narrow-spacing double-column formwork for deep foundation pit concrete caps under soft soil conditions, the construction steps are as follows:

[0022] Step 1: Laying out the location

[0023] On the leveling layer outside the reinforced concrete column cage that has been tied, the installation edge lines of the frame and the support side plate, as well as the position edge lines of the fixed column and the fixed plate are marked. The fixed column and the fixed plate are installed at the position edge lines. The bottom of the fixed column is a pointed tip for inserting and fixing inside the leveling layer. Ensure that the fixed column and the fixed plate are at the position edge lines. The fixed plate is equipped with a servo motor and a reel with a connecting rope.

[0024] Step 2: Frame Assembly

[0025] The frame includes a sub-frame body and a main frame body. The main frame body is assembled from the sub-frame body. The bottom main frame body is equipped with a fixing ear and the fixing ear is provided with a through hole for mounting the fixing post. The top frame body is fixed with a lifting ear.

[0026] The corresponding number of main frame sections are assembled vertically and horizontally through the sub-frame body, so that the height of the frame body is used for the height of the target concrete column. The connecting plates of the corner support body are temporarily fixed at the four corners of the support side plate through connecting holes and bolts. The release agent is sprayed on the inner wall of the support side plate.

[0027] Step 3: Installation of support formwork

[0028] The frame is moved to the predetermined position by hooking the lifting lug with the hoisting equipment. The predetermined position is the installation edge line of the frame. Ensure that the frame is directly above the installation edge line. Then, lower it vertically to ensure that the through hole on the fixing lug passes through the fixing column. Fix the fixing lug and the frame with nuts. Insert the plug of the connecting rope into the guide groove in the connecting groove and enter the locking groove under the action of the elastic body. Adjust the servo motor to tension the connecting rope through the reel.

[0029] Step 4: Formwork

[0030] By adjusting the adjusting parts on the main frame body, the linkage structure drives the support side plate to move inward to the corresponding support side plate installation edge line, and the support side plate is locked and fixed by the locking nut. Adjust the bolt tightening angle of the support body on the connecting plate, adjust the adjusting screw, and ensure that the rubber is pressed and fixed to the end of the support side plate by the pressure roller through the first and second pressure rods.

[0031] Step 5: Pouring

[0032] Concrete is poured into the area enclosed by the support side plate and the corner support leak prevention component. 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 support side plate back into the internal area of ​​the concrete column. After the concrete column has initially set, it is cured.

[0033] Step Six: Demolding

[0034] After the concrete column reaches the design strength, adjust the adjusting screw in the reverse direction, gradually move the pressure roller away from the corner joint until it is reset, loosen the bolts on the connecting plate, then adjust the locking nut in the reverse direction, and adjust the adjusting component in the reverse direction to move the support side plate outward at the same time.

[0035] 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.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] This invention employs a structural design that combines an outer frame and inner support for the support formwork. A linkage structure and adjusting components are used to move the inner support side plates closer to or further away from the outer frame, enabling short-distance fine-tuning. This facilitates the subsequent separation of the concrete column and allows for rapid dismantling of the support formwork during overall hoisting. However, it is crucial to ensure verticality during hoisting to prevent collisions with the concrete column. Furthermore, locking nuts are used to secure the adjusting screws, preventing the support side plates from loosening and causing grout leakage due to the impact of concrete pouring.

[0038] Through years of field practice, the inventors discovered that mortar leakage at the corner joints during concrete column pouring easily causes surface roughness. Therefore, in order to prevent mortar leakage, corner support anti-leakage components were added at the corner joints based on the aforementioned quick assembly and disassembly of support formwork. At the same time, the waist-shaped holes on the connecting plate allow for relative position adjustment of the side support plate connected to it, ensuring that the corner support anti-leakage components are adjusted in position along with the side support plate when the position of the side support plate relative to the frame is adjusted.

[0039] 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.

[0040] In summary, this invention enables rapid support and dismantling of narrow-spacing double-column formwork for concrete foundations and double concrete columns, ensuring the construction quality of the concrete columns. Attached Figure Description

[0041] Figure 1 This is a top view of the overall structure of the present invention;

[0042] Figure 2 For the present invention Figure 1 A magnified view of a section at the corner of two adjacent support side plates;

[0043] Figure 3 For the present invention Figure 1 Enlarged views of the four corners of the center divider;

[0044] Figure 4 For the present invention Figure 1 A partial enlarged view of the connection between the middle support side plate and the linkage rod;

[0045] Figure 5 This is a schematic diagram of the overall structure of the frame of the present invention;

[0046] Figure 6 This is a schematic diagram of the bottommost frame of the present invention;

[0047] Figure 7 This is a top view of the overall structure of the present invention with anti-sway components;

[0048] Figure 8 for Figure 7 A schematic diagram of the overall structure of the frame in the implementation method;

[0049] Figure 9 for Figure 7 A schematic diagram of the overall structure of the connector in the implementation method;

[0050] Figure 10 This is a diagram showing the connection relationship between the connector and the plug of the present invention;

[0051] Figure 11 This is a diagram showing the positional relationship between the guide groove, locking groove, and plug of the connector of the present invention;

[0052] Figure 12 This is a schematic diagram showing the position of the connecting rope and locking groove of the present invention before the support side plate is lifted off.

[0053] Figure 13 This is a schematic diagram of the critical position of the connecting rope and locking groove when the support side plate is lifted off.

[0054] Figure 14 This is a schematic diagram of the structure of the end of the connecting plate in this invention;

[0055] Figure 15 This is a schematic diagram of the linkage mechanism in this invention.

[0056] In the diagram: 1. Support side plate; 2. Fixed column; 3. Frame; 31. Main frame body; 32. Sub-frame body; 33. Fixed lug; 34. Lifting lug; 35. Connector; 351. Connecting groove; 352. Guide groove one; 353. Guide groove two; 354. Locking groove; 355. Elastic body; 4. Separator; 5. Adjusting component; 6. Locking nut; 7. Linkage body; 71. Hinge seat; 72. Linkage rod; 73. Gear; 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. Fixed plate; 91. Reel; 92. Servo motor; 93. Connecting rope; 94. Plug; 941. Connector; 942. Guide groove. Detailed Implementation

[0057] 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.

[0058] 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.

[0059] Example 1

[0060] like Figures 1 to 6 As shown, a narrow-spacing double-column formwork for a deep foundation pit concrete cap under soft soil conditions includes a support assembly and a support side plate 1.

[0061] Supporting components include:

[0062] like Figure 5 As shown, the fixing post 2 is used for installation on the ground, and the bottom of the fixing post 2 is a conical structure for inserting into the ground;

[0063] like Figure 5 and Figure 6 As shown, the frame 3 includes a main frame body 31 and a secondary frame body 32. The main frame body 31 has at least two sets of main frames arranged vertically, which are the same number as the linkage structure. The bottom main frame body 31 is equipped with a fixing ear 33, which has a through hole for mounting the fixing post 2. The top main frame body 31 is fixed with a lifting ear 34. The two sets of main frame bodies 31 are connected and fixed through the secondary frame body 32. The main frame body 31 and the secondary frame body 32 are connected and fixed by bolts.

[0064] The bottom main frame body 31 is inserted into the fixed column 2 and fixed with a nut. A separator 4 is provided in the middle of the main frame body 31. The separator 4 is used to divide the frame body 3 into two support areas. A linkage structure and an adjusting component 5 are provided on the side of the frame body 3 located in the support area. The linkage structure is used to connect the support side plate 1. The adjusting component 5 is threadedly connected to the frame body 3 and is set perpendicular to the support side plate 1. The end of the adjusting component 5 located inside the frame body 3 is rotatably installed on the support side plate 1. A locking nut is threadedly connected to the adjusting component 5 located inside the frame body 3. The locking nut is used to lock and fix the inner extension of the adjusting component 5.

[0065] like Figure 1 As shown, the linkage structure includes four sets of linkage bodies 7. Each set of linkage bodies 7 includes a hinge seat 71 fixed at the corner of the frame 3. Two symmetrically distributed linkage rods 72 are rotatably mounted on the hinge seat 71. The linkage rods 72 are elastic telescopic rods (such as...). Figure 15As shown), the free ends of the two linkage rods 72 are rotatably mounted to the corresponding support side plate 1. Both ends of the linkage rods 72 are provided with gears 73. The two gears 73 located on the hinge seat 71 mesh with each other, and the gear 73 at the other end meshes with the gear 73 on another set of linkage rods 72 on the support side plate 1.

[0066] The support side plate 1 is located on the side of the concrete column and inside the support area. The support side plate 1 is used to fit against the side of the corresponding concrete column.

[0067] In use, the main frame body 31 and the secondary frame body 32 are assembled and fixed vertically. Then, the linkage rod 72 is installed on the outer wall of the support side plate 1, and the adjusting component 5 is installed in the middle of the secondary frame body 32 on the corresponding side. A release agent is sprayed on the inner wall of the support side plate 1. Then, the fixing column 2 is installed at the target point. The lifting lug 34 is hooked by the hook of the hoisting equipment, and the entire frame 3 is hoisted above the target point. The frame 3 is vertically lowered, aligned with the through hole and the fixing column 2, and then the fixing lug 33 of the frame 3 is fixed by the nut. The adjusting component 5 (screw) is adjusted via the linkage rod 72 and the gear. 73 moves all the support side plates 1 towards the center, thereby enclosing the concrete column pouring area (containing the tied steel cage inside). Adjust the locking nuts to fit the locking nuts against the inner wall of the sub-frame body 32 to fix the support side plates 1. Then pour concrete into the pouring area and fully vibrate it. After reaching the predetermined strength, adjust the locking nuts in the opposite direction to move them away from the frame body 3 and closer to the support side plates 1. Then adjust the adjusting parts 5 in the opposite direction to move the support side plates 1 away from the concrete column. Finally, use the hook of the hoisting equipment to hook the lifting lug 34 to lift the support formwork away.

[0068] Example 2: Based on years of field practice, the inventors discovered that mortar easily leaks through the corner joints during concrete column pouring, causing surface roughness. Therefore, the following improvements were made based on the above examples:

[0069] like Figure 1 and Figure 2 As shown, it also includes a corner support leak-proof assembly, which is installed at the end of the support side plate 1 to connect two adjacent support side plates 1.

[0070] Corner support leak-proof components include:

[0071] An angle support body 8 is provided at both ends of the angle support body 8. The connecting plates 81 are provided with connecting holes 88 for bolt installation onto the corresponding support side plate 1.

[0072] Rubber sheet 82 is fixedly installed on the side of the corner support body 8 opposite to the concrete column;

[0073] 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. The pressure roller is used to press the rubber sheet 82 onto the end of the support side plate 1.

[0074] like Figure 14 As shown, the connecting hole 88 on the connecting plate 81 has a waist-shaped structure. The waist-shaped structure is used for the corner support body 8 to be recessed or expanded relative to the support side plate 1.

[0075] The connecting plate 81 is located on the outside of the support side plate 1. After the support side plate 1 is fixed by the adjusting piece 5 and the locking nut, the connecting plate 81 is fixed to the outside of the corresponding support side plate 1 by bolts. The adjusting screw 83 is initially adjusted to drive the screw sleeve 84 closer to the corner joint, and then the rubber 82 is pressed and sealed to the end of the support side plate 1. After the concrete is poured and vibrated, the screw sleeve 84 is adjusted towards the corner joint. The pressure rollers on the extrusion rod 1 85 and extrusion rod 2 86 press the concrete that has leaked at the end of the support side plate 1 and outside the rubber 82 back into the pouring area. Before the locking nut and the reverse adjusting piece 5 are released, the bolts on the connecting plate 81 can be released from the locked state, and the reverse adjusting screw 83 can drive the extrusion rod 1 85 and extrusion rod 2 86 to reset.

[0076] Example 3, as Figures 7 to 14 As shown, the inventors, through practical implementation on-site, discovered that while the support formwork can be quickly assembled and disassembled, it is prone to swaying during hoisting, leading to collisions between the formwork and the concrete column surface. Based on the above embodiments, the following improvements were made:

[0077] The double-column template also includes an anti-sway component, which includes a fixing plate 9 set on the outside of the frame 3. The fixing plate 9 is connected and fixed to the corresponding fixing column 2. A reel 91 and a servo motor 92 for driving the reel 91 to rotate are installed on the fixing plate 9. A connecting rope 93 is wound on the reel 91. The free end of the connecting rope 93 is connected to the outer wall of the frame 3.

[0078] A plug 94 is connected to the end of the connecting rope 93. A connector 35 is fixedly installed on the frame 3. The connector 35 is provided with a connecting groove 351. Guide groove 1 352, guide groove 2 353 and locking groove 354 are provided on the two side walls of the connecting groove 351. The inlet of guide groove 1 352 and the outlet of guide groove 2 353 are open. The two ends of the locking groove 354 are used to connect the roots of guide groove 1 352 and guide groove 2 353. A connector 941 is installed on the plug 94 to be adapted to guide groove 1 352, guide groove 2 353 and locking groove 354. An elastic body 355 is installed inside the connecting groove 351 and is used to abut the end of the plug 94. The elastic body 355 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 355. The guide groove 942 is adapted to the ball head structure.

[0079] like Figure 10 and Figure 11 As shown, the locking groove 354 gradually deviates outward from top to bottom and then gradually approaches inward. Specifically, the upper part gradually moves away from the support side plate 1, and the lower part quickly approaches the support side plate 1. That is, the angle between the upper part and the horizontal plane is greater than the angle between the lower part and the horizontal plane. When the bottom of the frame 3 is flush with the top of the concrete column, the connecting rope 93 and the lower part of the locking groove 354 are arranged vertically.

[0080] 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 352, gradually squeezing the elastic body 355 until it enters the locking groove 354. The plug 94 is released, allowing it to enter the middle under the action of the elastic body 355. During this process, the ball head structure will undergo vertical displacement along the guide groove 942. This process occurs after the frame 3 and the fixed column 2 are fixedly installed. When the support template is lifted away, the servo motor 92 will simultaneously drive the reel 91 to release an equal amount of connecting rope 93. When the bottom of the frame 3 is level with the top of the concrete column, the lower half of the connecting rope 93 and the locking groove 354 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 354 until it enters the guide groove 353, until the plug 94 is completely detached from the connector 35.

[0081] like Figures 1 to 14 As shown, a construction process for narrow-spacing double concrete columns in a deep foundation pit under soft soil conditions is described, and the construction steps are as follows:

[0082] Step 1: Laying out the location

[0083] On the leveling layer outside the reinforced concrete column cage that has been tied, the installation edge line of frame 3 and the installation edge line of support side plate 1, as well as the position edge line of fixed column 2 and fixed plate 9 are marked. Fixed column 2 and fixed plate 9 are installed at the position edge line of fixed column 2 and fixed plate 9. The bottom of fixed column 2 is pointed for insertion and fixing inside the leveling layer, ensuring that fixed column 2 and fixed plate 9 are at the position edge line. Servo motor 92 and reel 91 with connecting rope 93 are installed on fixed plate 9.

[0084] Step 2: Assemble frame 3

[0085] The frame 3 includes a sub-frame body 32 and a main frame body 31. The main frame body 31 is assembled vertically from the sub-frame body 32. The bottom main frame body 31 is equipped with a fixing ear 33 and the fixing ear 33 is provided with a through hole for mounting the fixing post 2. The top frame 3 is fixed with a lifting ear 34.

[0086] The corresponding number of main frame bodies 31 are assembled vertically and horizontally through the sub-frame body 32, so that the height of the frame body 3 is used for the height of the target concrete column. The connecting plates 81 of the corner support body 8 are temporarily fixed at the four corners of the support side plate 1 through the connecting holes 88 and bolts, and the release agent is sprayed on the inner wall of the support side plate 1.

[0087] Step 3: Installation of support formwork

[0088] The frame 3 is moved to the predetermined position by hooking the lifting lug 34 with the hoisting equipment. The predetermined position is the installation edge line position of the frame 3. Ensure that the frame 3 is directly above the installation edge line position. Then, it is lowered vertically to ensure that the through hole on the fixing lug 33 passes through the fixing column 2. The fixing lug 33 and the frame 3 are fixed and installed by nuts. The plug 94 of the connecting rope 93 is inserted into the guide groove 352 in the connecting groove 351 and enters the locking groove 354 under the action of the elastic body 355. The servo motor 92 is adjusted to tension the connecting rope 93 through the reel 91.

[0089] Step 4: Formwork

[0090] By adjusting the adjusting piece 5 on the main frame body 31, the support side plate 1 is moved inward to the corresponding support side plate 1 installation edge line through the linkage structure, and the support side plate 1 is locked and fixed by the locking nut. The bolt tightening angle of the support body 8 on the connecting plate 81 is adjusted, and the adjusting screw 83 is adjusted to ensure that the rubber 82 is pressed and fixed to the end of the support side plate 1 by the pressure roller through the first pressure rod 85 and the second pressure rod 86.

[0091] Step 5: Pouring

[0092] Concrete is poured into the area enclosed by the support side plate 1 and the corner support leak prevention component. 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 drives the concrete between the rubber sheet 82 and the support side plate 1 to be pressed back into the internal area of ​​the concrete column. After the concrete column has initially set, it is cured.

[0093] Step Six: Demolding

[0094] After the concrete column reaches the design strength, adjust the adjusting screw 83 in the reverse direction, gradually move the pressure roller away from the corner joint until it is reset, loosen the bolts on the connecting plate 81, then adjust the locking nut in the reverse direction, and adjust the adjusting piece 5 in the reverse direction to move the support side plate 1 outward at the same time.

[0095] The hoisting equipment re-hooks the lifting lug 34 and gradually moves away from the frame 3. During the movement, the servo motor 92 drives the reel 91 to gradually release the connecting rope 93, ensuring the verticality of the frame 3 during movement and preventing it from contacting the concrete column. When the bottom of the frame 3 is level with the top of the concrete column, the lower half of the connecting rope 93 and the locking groove 354 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 354 into the guide groove 353. As the frame 3 continues to move away, the plug 94 and the connector 35 are separated.

[0096] 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-column formwork for deep foundation pit concrete caps under soft soil conditions, characterized in that, Including support components and support side plates (1); Supporting components include: Fixed column (2), the fixed column (2) is used for installation on the ground; The frame (3) is inserted into the fixed column (2) and fixed by nuts. A partition (4) is provided in the middle of the frame (3). The partition (4) is used to divide the frame (3) into two support areas. A linkage structure and an adjusting component (5) are provided on the side of the frame (3) located in the support area. The linkage structure is used to connect the support side plate (1). The threaded connection of the adjusting component (5) is on the frame (3) and is set perpendicular to the support side plate (1). The end of the adjusting component (5) located inside the frame (3) is rotatably installed on the support side plate (1). A locking nut is threaded on the adjusting component (5) located inside the frame (3). The locking nut is used to lock and fix the inner extension of the adjusting component (5). The support side plate (1) is located on the side of the concrete column and on the inner side of the support area. The support side plate (1) is used to fit the side of the corresponding concrete column. Angle support leak-proof component is installed at the end of the support side plate (1) to connect two adjacent support side plates (1) and to actively seal the corner joints of the support side plate (1). The linkage structure includes four sets of linkage bodies (7). Each set of linkage bodies (7) includes a hinge seat (71) fixed at the corner of the frame (3). Two symmetrically distributed linkage rods (72) are rotatably installed on the hinge seat (71). The free ends of the two linkage rods (72) are rotatably installed with the corresponding support side plate (1). The linkage rods (72) are elastic telescopic rods. Gears (73) are provided at both ends of the linkage rods (72). The two gears (73) on the hinge seat (71) mesh with each other. The gear (73) at the other end meshes with the gear (73) on another set of linkage rods (72) on the support side plate (1). By adjusting the adjusting component (5), all the support side plates (1) are moved towards the center via the linkage rod (72) and gear (73), thereby enclosing the concrete column pouring area; The double-column template also includes an anti-sway component, which includes a fixing plate (9) set on the outside of the frame (3), the fixing plate (9) and the corresponding fixing column (2) are connected and fixed, and a reel (91) and a servo motor (92) 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 frame (3); A plug (94) is connected to the end of the connecting rope (93). A connector (35) is fixedly installed on the frame (3). A connecting slot (351) is provided on the connector (35). A guide groove (352), a guide groove (353), and a locking groove (354) are provided on the two side walls of the connecting slot (351). The inlet of the guide groove (352) and the outlet of the guide groove (353) are both open. The two ends of the locking groove (354) are used to connect the roots of the guide groove (352) and the guide groove (353). The plug (94) is equipped with a connector (941) for matching with guide groove 1 (352), guide groove 2 (353), and locking groove (354). An elastic body (355) is installed inside the connector (351), and the elastic body (355) is used to abut against the end of the plug (94). The elastic body (355) 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 (355). The guide groove (942) is matched with the ball head structure. The locking groove (354) gradually deviates outward from top to bottom and then gradually approaches inward. When the bottom of the frame (3) is level with the top of the concrete column, the lower half of the connecting rope (93) and the locking groove (354) are arranged vertically.

2. The narrow-spacing double-column formwork for deep foundation pit concrete caps under soft soil conditions according to claim 1, characterized in that, The frame (3) includes a main frame body (31) and a sub-frame body (32). The main frame body (31) has at least two sets of fixed ears (33) installed on the bottom main frame body (31), and the fixed ears (33) have through holes for mounting the fixed posts (2). The top main frame body (31) is fixed with a lifting ear (34). The two sets of main frame bodies (31) are connected and fixed through the sub-frame body (32).

3. The narrow-spacing double-column formwork for deep foundation pit concrete caps under soft soil conditions according to claim 1, characterized in that, The corner support leak-proof assembly 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) for bolt installation on the corresponding support side plate (1). 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. The pressure roller is used to press the rubber (82) onto the end of the support side plate (1).

4. A narrow-spacing double-column formwork for deep foundation pit concrete caps under soft soil conditions, as described in claim 3, is characterized in that... The connecting hole (88) on the connecting plate (81) is a waist-shaped structure, which is used for the corner support body (8) to be recessed or expanded relative to the support side plate (1).

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