Post-pouring reserved hole support-free and disassembly-free integrated formwork and construction method thereof
Through the integrated formwork without support and dismantling, steel plates and angle steel structures, the problems of high space occupation and cost in the traditional post-pouring reserved hole process are solved, and efficient construction and bearing capacity are achieved. The steel plate can be used as a permanent structure to save materials and manpower.
Patent Information
- Application Number
- CN202510731444.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2025-07-25
AI Technical Summary
In the traditional post-pouring reserved hole process, the erection and demolition of support frames and wooden formwork take up space, extend construction period, increase costs, and consume materials and manpower.
The steel plate is fixed with no support and dismantling and unchanged integrated formwork. Through structures such as steel plates, fixing holes, angle steel, grooves, small steel sheets, steel square passes, rubber strips and short steel, the steel plate is fixed with suspended ropes and bolts, combined with the design of angle steel and trigger plates, the bearing capacity is enhanced and the frame support is avoided.
Save frame materials and manpower, reduce construction costs, shorten construction period, avoid occupying the space in the lower floor, and improve bearing capacity. Steel plates can be retained as permanent structures, reduce demolition damage, and improve construction efficiency.
Smart Images
Figure CN120367339A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a construction method for concrete formwork, and particularly to an integrated formwork for post-cast reserved holes that is free of support and demolition and its construction method. Background Art
[0002] In many construction projects, due to complex construction requirements, it is inevitable to reserve some holes during the pouring of concrete floors. These reserved holes in the floors often have various functions. Some are for the convenience of construction workers to move up and down, some are for the convenient transportation of building materials up and down, and some are for providing space for the installation and use of temporary facilities such as tower cranes or construction elevators. In the later stage of the construction of the building project, after these holes in the floor have fulfilled the above functions, it is necessary to pour concrete into the holes, and finally form a complete concrete floor structure together with the surrounding pre-poured concrete slabs.
[0003] The traditional technological process of post-cast reserved holes is as follows: a support frame is erected below the floor hole, a wooden formwork slightly larger than the hole size is placed between the upper part of the support frame and the lower part of the hole, and the wooden formwork is supported by the support frame; then, steel bars are fabricated and installed in the floor hole above the wooden formwork; after the steel bar installation is completed, concrete is poured into the hole to make the newly poured concrete surface flush with the surrounding pre-poured floor surface; after the newly poured concrete in the hole forms a certain strength, the wooden formwork and the support frame below the hole are removed; during the whole process, the functions of the support frame and the wooden formwork are: to prevent personnel and steel bars from falling during the steel bar fabrication and installation; when pouring concrete, to make the concrete form into a plate shape and prevent the concrete from falling before reaching a certain strength.
[0004] However, this traditional process has obvious disadvantages: (1) During the period from the installation of the support frame and the wooden formwork to their demolition, the support frame occupies the space below the floor hole for a long time, reducing the working surface of the floor where the support frame is located and having an adverse impact on other types of work; (2) The erection and demolition of the support frame prolong the construction period; (3) The erection and demolition work of the support frame not only consume materials and manpower, but also generate a certain amount of waste, all of which will increase the construction cost. Summary of the Invention
[0005] The purpose of the present application is to provide an integrated formwork for post-cast reserved holes that is free of support and demolition, including a main body mechanism, and further including: A fixing mechanism, the fixing mechanism is located below the main body mechanism; Among them, the fixing mechanism includes a steel plate, fixing holes, a partition frame, an angle steel, a groove, a small steel sheet, a steel square tube, a rubber strip and a short steel. A number of fixing holes are evenly opened on the steel plate. The top of the steel plate is fixedly connected to the partition frame. Three angle steels are arranged inside the partition frame. Grooves are arranged on both sides of the angle steel. Three small steel sheets are arranged on the side of the top of the angle steel. A steel square tube for increasing the bearing capacity of the steel plate is arranged on the side of the small steel sheet close to the angle steel. A rubber strip for sealing is arranged on the top of the steel plate. Two short steels are arranged on the top of the steel plate.
[0006] Preferably, the steel square tube is located above the angle steel, the size of the groove is adapted to the outer dimensions of the inner wall of the bulkhead, the two short steels are located inside the bulkhead, the two short steels are located between two angle steels, the bulkhead is located between a number of fixing holes, the length of the steel square tube is greater than the length of the angle steel, the outer side of the rubber strip is ring-shaped, and the bulkhead is located inside the rubber strip.
[0007] Preferably, the bottom of the angle steel is welded to the top of the steel plate, the side of the angle steel close to the groove is welded to the inner wall of the bulkhead, the side surfaces of the small steel sheet are welded to the steel square tube and the angle steel, and the short steel is welded to the top of the steel plate.
[0008] Preferably, the main structure comprises a concrete floor slab, a reserved hole is opened on the concrete floor slab, and a plurality of openings are evenly opened on the concrete floor slab.
[0009] Preferably, the reserved hole is located between a plurality of openings, and the openings penetrate the concrete floor slab.
[0010] Preferably, the size of the reserved hole is larger than the size of the partition frame, the concrete floor is located above the steel plate, the size of the opening is compatible with the size of the fixing hole, several of the openings are aligned with several fixing holes respectively, and the steel square is located above the concrete floor.
[0011] Preferably, a resistance mechanism is arranged inside the fixing mechanism, and the resistance mechanism comprises three trigger grooves opened on the top of the steel plate, a trigger plate is slidably connected inside the trigger groove, a resistance block is fixedly connected to the bottom of the trigger plate, a first slide groove is opened inside the steel plate, a second slide groove is opened on the side of the first slide groove, a slide plate is slidably connected inside the second slide groove, a resistance plate is fixedly connected to the side of the slide plate away from the first slide groove, and an elastic member is arranged on the side of the resistance plate away from the slide plate.
[0012] Preferably, the abutting block extends through the inner wall of the triggering groove into the interior of the first sliding groove. The triggering groove, the first sliding groove, and the second sliding groove are interconnected. One side of the sliding plate, which faces the abutting block, is provided with an inclined surface. The bottom of the abutting block abuts against the inclined surface of the sliding plate. The sliding plate is elastically connected to the inner wall of the second sliding groove through an elastic member.
[0013] Preferably, the abutting plate extends through the inner wall of the second sliding groove to the side of the partition frame away from the angle steel. The abutting plate is located on the side of the rubber strip close to the partition frame. The bottom of the angle steel abuts against the top of the triggering plate.
[0014] A construction method for an integrated formwork for post-cast reserved holes that is free of support and demolition is as follows: S1. First, place the processed steel plate for adapting to the reserved hole on a workbench on the floor below the reserved hole, align the fixing holes on the steel plate with the drilled holes on the concrete floor slab, and insert the head of the M16 screw downward from under the steel plate into each fixing hole. Then weld the head of the screw to the bottom surface of the steel plate to firmly fix the screw to the steel plate. The length of the screw needs to be slightly greater than the thickness of the concrete floor slab plus the height of the subsequent nut. At the same time, the length of the part of the screw protruding above the concrete floor slab should not be greater than the thickness of the subsequent plastering on the concrete floor slab surface to avoid the need to cut the part of the screw protruding too much above the ground during subsequent decoration of the floor. S2. Subsequently, suspend a lifting rope vertically from above the reserved hole, tie the bottom end of the lifting rope to the short steel on the steel plate. Additionally, prepare multiple traction ropes with the same quantity as the fixing holes. Insert each traction rope downward into each drilled hole in the concrete floor slab, and tie the bottom end of the traction rope to the screw on the steel plate. Then pull up the lifting rope to lift the steel plate below the hole. Finally, insert the screw in the steel plate into the concrete floor slab and the drilled hole through the traction of the traction rope. On the concrete floor slab surface, put a gasket on the screw and then put on a nut. Tighten the nut to tighten the gasket against the top of the concrete floor slab to fix the screw to the concrete floor slab. Eventually, firmly fix the steel plate welded with the screw to the floor slab, and make the rubber strip abut against the bottom of the concrete floor slab. Move the partition frame into the reserved hole. At this time, untie the lifting rope and the traction ropes, and stick a sealing strip on the boundary line where the edge of the hole contacts the steel plate. S3. At the same time, for openings with a length or width greater than 1m, in order to compensate for the insufficient bearing capacity of the steel plate for the subsequent short steel and concrete, it is necessary to place multiple angle steels on the steel plate so that they are against the top of the trigger plate, and weld the contact parts of the angle steel and the trigger plate. Then, press the angle steel downward to drive the trigger plate downward. The downward movement of the trigger plate will squeeze the inclined surface of the slide plate to move it away from the resistance block, drive the resistance plate to resist the inner wall of the reserved hole and squeeze the elastic member. At this time, the groove on the angle steel is against the inner wall of the partition frame, and then the partition frame and the angle steel, as well as the bottom of the angle steel and the inner wall of the trigger groove are welded. Then, a steel square tube is placed parallel above each angle steel, so that the two ends of the steel square tube are placed on the concrete floor slab at the edge of the reserved hole. At the same time, multiple small steel sheets are welded to the sides of the angle steel and the steel square tube between each angle steel and the steel square tube above it by fillet welding. S4. Finally, install the steel bars on the steel plate in the reserved hole. When installing the main reinforcement perpendicular to the length direction of the angle steel, measure the size in advance, prepare the steel bars in sections, weld the ends of the steel bars to the side surfaces where the steel bars touch the side surfaces of the angle steel, and finally connect the segmented steel bars with the angle steel to ensure the integrity of the main reinforcement. Then pour micro-expansive concrete into the reserved hole until the pouring surface reaches the surrounding concrete slab surface. Pay attention to vibration during pouring, and properly maintain the newly poured concrete in the reserved hole. After the concrete in the hole area reaches a certain strength, cut the small steel sheets protruding from the concrete surface, remove the steel square tube and reuse it. The steel plate and screws on the bottom surface of the concrete slab do not need to be removed and can be retained as a permanent structure.
[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention facilitates the installation of steel plates by arranging short steel and fixing holes and other structural coordination. The steel plates are lifted by hanging ropes and fixed by bolts. There is no need to set up a formwork support frame below, which saves a lot of frame materials and manpower in the erection and dismantling of the frame, reducing construction costs. At the same time, the space of the floor below the reserved hole will not be occupied, so that other types of work can be carried out smoothly, accelerating the construction progress. 2. The present invention improves the bearing capacity of the device by arranging structures such as a contact plate and an angle steel. For an opening with a length or width greater than 1m, in order to compensate for the insufficient bearing capacity of the steel plate for subsequent steel bars and concrete, it is necessary to place multiple angle steels on the steel plate so that they are against the top of the trigger plate, and weld the contact parts of the angle steel and the trigger plate. Then, the angle steel is pressed downward to drive the trigger plate downward. The downward movement of the trigger plate will squeeze the inclined surface of the slide plate to move it away from the contact block, drive the contact plate to collide with the inner wall of the reserved hole and squeeze the elastic member. At this time, the groove on the angle steel and the inner wall of the partition frame are against each other, increasing the friction between the device and the inner wall of the reserved hole, and at the same time indirectly increasing the bearing capacity of the steel plate through the supporting force; 3. The present invention further improves the bearing capacity of the device by arranging small steel sheets and steel square tubes and other structural coordination. A steel square tube is placed parallel to each angle steel, so that the two ends of the steel square tube are placed on the concrete floor slab at the edge of the reserved hole. At the same time, multiple small steel sheets are welded to the sides of the angle steel and the steel square tube between each angle steel and the steel square tube above it by fillet welding. The steel plate bears the gravity of the steel bars and concrete, and no frame support is required. Therefore, the shape is simple and the construction is very convenient. For the opening with a length or width greater than 1m, in addition to fixing the steel plate to the floor slab through screws and nuts, angle steels, small steel sheets and steel square tubes are also added to greatly enhance the bending resistance and bearing capacity of the steel plate on the bottom of the opening, ensuring that the steel plate will not collapse or be obviously bent and deformed without frame support when installing steel bars and pouring concrete; 4. The present invention arranges small steel sheets and steel square tubes and other structures to cooperate. After the concrete in the hole area reaches a certain strength, the small steel sheets protruding from the concrete surface are cut off, and the steel square tubes can be removed and reused. The steel plates and screws on the bottom of the concrete floor slab do not need to be removed, but are retained as permanent structures, thereby avoiding violent knocking during the removal of traditional formwork and reducing damage to the concrete surface. No subsequent repair and polishing are required, thus saving the cost of the plastering process. Moreover, the steel square tubes can be directly used in other projects after being disassembled, eliminating the need for formwork cleaning and repairing, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of Example 1 and Example 2 of the present application; Figure 2 It is a three-dimensional structural schematic diagram of the fixing mechanism of the present application; Figure 3 It is a schematic cross-sectional structure diagram of the conflict mechanism of the present application; Figure 4 This application Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of the fixing mechanism of the present application when viewed from above; Figure 6 It is a schematic diagram of the structure of the fixing mechanism of the present application when viewed from above; Explanation of the reference numerals: 1. fixing mechanism; 101. steel plate; 102. fixing hole; 103. partition frame; 104. angle steel; 105. groove; 106. small steel sheet; 107. steel square tube; 108. rubber strip; 109. short steel; 2. main mechanism; 201. concrete floor; 202. reserved hole; 203. opening; 3. interference mechanism; 301. trigger groove; 302. trigger plate; 303. interference block; 304. first slide groove; 305. second slide groove; 306. slide plate; 307. interference plate; 308. elastic member. DETAILED DESCRIPTION
[0017] The following will further elaborate on this application in conjunction with the attached drawings. Figure 1 - Drawings Figure 6 and make a more detailed description of this application.
[0018] Embodiment 1: An integrated formwork for post-cast reserved holes that is free of support and demolition. Referring to Figures 1 to 5 , it includes a main body mechanism 2 and also includes: A fixing mechanism 1, and the fixing mechanism 1 is located below the main body mechanism 2; Among them, the fixing mechanism 1 includes a steel plate 101, fixing holes 102, a partition frame 103, angle steels 104, grooves 105, small steel sheets 106, steel square tubes 107, rubber strips 108, and short steels 109. A number of fixing holes 102 are evenly opened on the steel plate 101. A partition frame 103 is fixedly connected to the top of the steel plate 101. Three angle steels 104 are arranged inside the partition frame 103. Grooves 105 are arranged on both sides of the angle steels 104. Three small steel sheets 106 are arranged on the side of the top of the angle steels 104. A steel square tube 107 for increasing the bearing capacity of the steel plate 101 is arranged on the side of the small steel sheet 106 close to the angle steel 104. A rubber strip 108 for sealing is arranged on the top of the steel plate 101. Two short steels 109 are arranged on the top of the steel plate 101.
[0019] The steel square tube 107 is located above the angle steel 104. The size of the groove 105 is adapted to the outer shape size of the inner wall of the partition frame 103. The two short steels 109 are located inside the partition frame 103. The two short steels 109 are both located between the two angle steels 104. The partition frame 103 is located between a number of fixing holes 102. The length of the steel square tube 107 is greater than the length of the angle steel 104. The outer side of the rubber strip 108 is annular. The partition frame 103 is located inside the rubber strip 108. The bottom of the angle steel 104 is welded to the top of the steel plate 101. The side of the angle steel 104 close to the groove 105 is welded to the inner wall of the partition frame 103. The sides of the small steel sheets 106 are welded to the steel square tube 107 and the angle steel 104 respectively. The short steel 109 is welded to the top of the steel plate 101.
[0020] The main body mechanism 2 includes a concrete floor slab 201. A reserved hole 202 is opened on the concrete floor slab 201. A number of openings 203 are evenly opened on the concrete floor slab 201. The reserved hole 202 is located between a number of openings 203. The openings 203 penetrate through the concrete floor slab 201.
[0021] The size of the reserved hole 202 is larger than the size of the partition frame 103. The concrete floor slab 201 is located above the steel plate 101. The size of the opening 203 is adapted to the size of the fixing hole 102. A number of openings 203 and a number of fixing holes 102 are respectively aligned. The steel square tube 107 is located above the concrete floor slab 201.
[0022] The implementation principle of the embodiment of this application is as follows: By setting up structures such as the short steel 109 and the fixing holes 102 in cooperation, it facilitates the installation of the steel plate 101. Hang the lifting rope vertically from above the reserved hole 202, tie the bottom end of the lifting rope to the short steel 109 on the steel plate 101. Additionally, prepare multiple traction ropes with the same quantity as the fixing holes 102, insert each traction rope from top to bottom into each opening 203 of the concrete floor slab 201, and tie the bottom end of the traction rope tightly to the screw on the steel plate 101. Then, pull up the lifting rope to lift the steel plate 101 below the hole. Finally, make the screw in the steel plate 101 insert into the concrete floor slab 201 and the opening 203 through the traction of the traction rope. On the surface of the concrete floor slab 201, put the gasket on the screw and then put on the nut, and tighten the nut to screw the gasket tightly to the top of the concrete floor slab 201 to fix the screw to the concrete floor slab 201. Eventually, the steel plate 101 welded with the screw is tightly fixed to the floor slab, and the rubber strip 108 abuts against the bottom of the concrete floor slab 201 to increase the sealing performance. The partition frame 103 moves into the reserved hole 202. At this time, untie the lifting rope and the traction rope, and paste the sealing strip on the boundary line where the edge of the hole contacts the steel plate 101 to further prevent slurry leakage during subsequent concrete pouring. There is no need to set up formwork support frames below, saving a large amount of formwork materials and also saving the labor for formwork erection and demolition, reducing the construction cost. At the same time, it does not occupy the space of the floor below the reserved hole 202, enabling other trades to proceed smoothly and accelerating the construction progress; By setting up structures such as the abutting plate 307 and the angle steel 104 in cooperation, the bearing capacity of the device is improved. For holes with a length or width greater than 1 m, in order to make up for the insufficient bearing capacity provided by the steel plate 101 for subsequent steel bars and concrete, multiple angle steels 104 need to be placed on the steel plate 101 to make them abut against the top of the trigger plate 302, and weld the contact part of the angle steel 104 and the trigger plate 302. Then, press down the angle steel 104 to drive the trigger plate 302 to move downward. When the trigger plate 302 moves downward, it will squeeze the inclined surface of the sliding plate 306 to make it move away from the abutting block 303, driving the abutting plate 307 to abut against the inner wall of the reserved hole 202 and squeeze the elastic member 308. At this time, the groove 105 on the angle steel 104 abuts against the inner wall of the partition frame 103, increasing the friction between the device and the inner wall of the reserved hole 202, and indirectly increasing the bearing capacity of the steel plate 101 through the supporting force.
[0023] Embodiment 2: A post-cast reserved hole non-support and non-demolition integrated formwork, referring to Figures 3 to 6A resistance mechanism 3 is arranged inside the fixing mechanism 1, and the resistance mechanism 3 includes three trigger grooves 301 opened on the top of the steel plate 101, a trigger plate 302 is slidably connected inside the trigger groove 301, and a resistance block 303 is fixedly connected to the bottom of the trigger plate 302, a first slide groove 304 is opened inside the steel plate 101, a second slide groove 305 is opened on the side of the first slide groove 304, a slide plate 306 is slidably connected inside the second slide groove 305, a resistance plate 307 is fixedly connected to the side of the slide plate 306 away from the first slide groove 304, and an elastic member 308 is arranged on the side of the resistance plate 307 away from the slide plate 306.
[0024] The resistance block 303 passes through the inner wall of the trigger groove 301 and extends to the inside of the first slide groove 304. The trigger groove 301, the first slide groove 304 and the second slide groove 305 are communicated with each other. The slide plate 306 is provided with an inclined surface on one side of the resistance block 303. The bottom of the resistance block 303 is against the inclined surface of the slide plate 306. The slide plate 306 is elastically connected to the inner wall of the second slide groove 305 through the elastic member 308. The resistance plate 307 passes through the inner wall of the second slide groove 305 and extends to the side of the bulkhead 103 away from the angle steel 104. The resistance plate 307 is located on the side of the rubber strip 108 close to the bulkhead 103. The bottom of the angle steel 104 is against the top of the trigger plate 302.
[0025] The implementation principle of the embodiment of the present application is as follows: by setting up small steel sheets 106 and steel square tubes 107 and other structural coordination, the bearing capacity of the device is further improved. A steel square tube 107 is placed parallel to each angle steel 104, so that the two ends of the steel square tube 107 are placed on the concrete floor 201 at the edge of the reserved hole 202. At the same time, multiple small steel sheets 106 are welded to the sides of the angle steel 104 and the steel square tube 107 by fillet welding between each angle steel 104 and the steel square tube 107 above it. 101 bears the weight of steel bars and concrete, and does not need frame support, so it has a simple shape and is very convenient to construct. For openings with a length or width greater than 1m, in addition to fixing the steel plate 101 to the floor slab through screws and nuts, angle steel 104, small steel sheets 106 and steel square tubes 107 are also added to greatly enhance the bending resistance and bearing capacity of the steel plate 101 at the bottom of the opening, ensuring that the steel plate 101 will not collapse or be bent or deformed significantly without frame support when installing steel bars and pouring concrete. By setting up structures such as the small steel sheet 106 and the square steel tube 107 in cooperation, after the concrete in the waiting hole area reaches a certain strength, the protruding small steel sheet 106 on the concrete surface is cut, and then the square steel tube 107 can be removed and reused. The steel plate 101 and the screw at the bottom of the concrete floor slab 201 do not need to be removed and are retained as a permanent structure, avoiding violent knocking during the removal of traditional formwork, reducing damage to the concrete surface, eliminating the need for subsequent repair and grinding, saving the cost of the plastering process, and the square steel tube 107 can be directly used for other projects after disassembly, eliminating the formwork cleaning and repair links, and improving work efficiency.
[0026] A construction method for an integrated formwork for post-cast reserved holes that is free of support and demolition. The construction method is as follows: S1. First, place the processed steel plate 101 for adapting to the reserved hole 202 on a workbench on the floor below the reserved hole 202, align the fixing holes 102 on the steel plate 101 with the drilled holes 203 in the concrete floor slab 201, and insert the head of the M16 screw downward from under the steel plate 101 into each fixing hole 102, and weld the head of the screw to the bottom surface of the steel plate 101 to make the screw firmly fixed to the steel plate 101. The length of the screw needs to be slightly greater than the thickness of the concrete floor slab 201 plus the height of the subsequent nut. At the same time, the length of the part of the screw protruding from the concrete floor slab 201 cannot be greater than the thickness of the plaster on the subsequent concrete floor slab 201 surface to avoid cutting the part of the screw protruding too much from the ground during subsequent floor decoration. S2. Then, suspend a lifting rope vertically from above the reserved hole 202, and tie the bottom end of the lifting rope to the short steel 109 on the steel plate 101. In addition, prepare multiple traction ropes with the same number as the fixing holes 102, insert each traction rope downward into each hole 203 in the concrete floor slab 201, and tie the bottom end of the traction rope to the screw on the steel plate 101. Then, pull up the lifting rope to lift the steel plate 101 below the hole. Finally, make the screw in the steel plate 101 be inserted into the concrete floor slab 201 and the hole 203 through the traction of the traction rope. On the surface of the concrete floor slab 201, put a gasket on the screw, put on a nut, and tighten the nut to screw the gasket tightly on the top of the concrete floor slab 201 to fix the screw to the concrete floor slab 201. Finally, make the steel plate 101 welded with the screw be tightly fixed to the floor slab, and the rubber strip 108 abuts against the bottom of the concrete floor slab 201 to increase the sealing performance. Move the partition frame 103 into the reserved hole 202. At this time, untie the lifting rope and the traction rope, and stick a sealing strip on the boundary line where the edge of the hole contacts the steel plate 101 to further prevent slurry leakage during subsequent concrete pouring. S3. At the same time, for the opening with a length or width greater than 1m, in order to make up for the insufficient bearing capacity of the steel plate 101 for the subsequent short steel and concrete, it is necessary to place multiple angle steels 104 on the steel plate 101 so that they are against the top of the trigger plate 302, and weld the contact parts of the angle steel 104 and the trigger plate 302, and then press the angle steel 104 downward to drive the trigger plate 302 downward. The downward movement of the trigger plate 302 will squeeze the inclined surface of the slide plate 306 to move it away from the resistance block 303, and drive the resistance plate 307 to resist the inner wall of the reserved hole 202 and squeeze the spring The trigger groove 301 is formed by welding the groove 105 on the angle steel 104 to the inner wall of the diaphragm 103, and then the diaphragm 103 and the angle steel 104 are welded together, and the bottom of the angle steel 104 and the inner wall of the trigger groove 301 are welded together. Then, a steel square tube 107 is placed above each angle steel 104 in parallel, so that the two ends of the steel square tube 107 are placed on the concrete floor 201 at the edge of the reserved hole 202. At the same time, multiple small steel sheets 106 are welded to the sides of the angle steel 104 and the steel square tube 107 between each angle steel 104 and the steel square tube 107 above it by fillet welding. S4. Finally, steel bars are installed on the steel plate 101 in the reserved hole 202. When installing the main reinforcement perpendicular to the length direction of the angle steel 104, the size can be measured in advance, and the steel bars can be prepared in sections. At the position where the steel bars contact the side of the angle steel 104, the ends of the steel bars are welded to the side. Finally, the segmented steel bars and the angle steel 104 are connected as one to ensure the integrity of the main reinforcement. Then, slightly expanded concrete is poured into the reserved hole 202 until the pouring surface reaches the surface of the surrounding concrete slab 201. Pay attention to vibration during pouring, and properly maintain the newly poured concrete in the reserved hole 202. After the concrete in the hole area reaches a certain strength, cut the small steel sheet 106 protruding from the concrete surface, remove the steel square tube 107 and reuse it. The steel plate 101 and screws on the bottom surface of the concrete slab 201 do not need to be removed and can be retained as a permanent structure.
[0027] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. An integrated formwork for post-cast reserved holes that is free of support and demolition, comprising a main body mechanism (2), characterized in that: It also includes: A fixing mechanism (1) located below the main body mechanism (2); Among them, the fixing mechanism (1) includes a steel plate (101), fixing holes (102), a bulkhead (103), angle steel (104), grooves (105), small steel sheets (106), square steel tubes (107), rubber strips (108) and short steel bars (109). A number of fixing holes (102) are evenly formed in the steel plate (101). A bulkhead (103) is fixedly connected to the top of the steel plate (101). Three angle steels (104) are arranged inside the bulkhead (103). Grooves (105) are arranged on both sides of the angle steel (104). Three small steel sheets (106) are arranged on the side of the top of the angle steel (104). A square steel tube (107) for increasing the bearing capacity of the steel plate (101) is arranged on the side of the small steel sheet (106) close to the angle steel (104). A rubber strip (108) for sealing is arranged on the top of the steel plate (101). Two short steel bars (109) are arranged on the top of the steel plate (101).
2. The post-cast reserved hole integrated formwork that is free of support and demolition according to claim 1, characterized in that, The square steel tube (107) is located above the angle steel (104). The size of the groove (105) is adapted to the external dimension of the inner wall of the bulkhead (103). The two short steel bars (109) are located inside the bulkhead (103). The two short steel bars (109) are both located between the two angle steels (104). The bulkhead (103) is located between a number of fixing holes (102). The length of the square steel tube (107) is greater than the length of the angle steel (104). The outer side of the rubber strip (108) is annular. The bulkhead (103) is located inside the rubber strip (108).
3. The post-cast reserved hole integrated formwork that is free of support and demolition according to claim 1, characterized in that, The bottom of the angle steel (104) is welded to the top of the steel plate (101). The side of the angle steel (104) close to the groove (105) is welded to the inner wall of the bulkhead (103). The sides of the small steel sheets (106) are welded to the square steel tube (107) and the angle steel (104) respectively. The short steel bar (109) is welded to the top of the steel plate (101).
4. The post-cast reserved hole integrated formwork that is free of support and demolition according to claim 1, wherein The main body mechanism (2) includes a concrete floor slab (201). A reserved hole (202) is formed in the concrete floor slab (201). A number of openings (203) are evenly formed in the concrete floor slab (201).
5. The integral formwork for post-cast reserved holes that is free of support and demolition according to claim 4, characterized in that The reserved hole (202) is located between a number of openings (203). The opening (203) penetrates through the concrete floor slab (201).
6. The post-cast reserved hole integrated formwork that is free of support and demolition according to claim 4, wherein, The size of the reserved hole (202) is larger than the size of the bulkhead (103). The concrete floor slab (201) is located above the steel plate (101). The size of the opening (203) is adapted to the size of the fixing hole (102). A number of the openings (203) and a number of the fixing holes (102) are respectively aligned. The square steel tube (107) is located above the concrete floor slab (201).
7. The post-cast reserved hole integrated formwork that is free of support and demolition according to claim 4, characterized in that, The fixing mechanism (1) is provided with a resistance mechanism (3) inside. The resistance mechanism (3) comprises three trigger grooves (301) provided on the top of the steel plate (101). A trigger plate (302) is slidably connected inside the trigger grooves (301). A resistance block (303) is fixedly connected to the bottom of the trigger plate (302). A first sliding groove (304) is provided inside the steel plate (101). A second sliding groove (305) is provided on the side of the first sliding groove (304). A slide plate (306) is slidably connected inside the second sliding groove (305). A resistance plate (307) is fixedly connected to the side of the slide plate (306) away from the first sliding groove (304). An elastic member (308) is provided on the side of the resistance plate (307) away from the slide plate (306).
8. The post-cast reserved hole integrated formwork that is free of support and demolition according to claim 7, wherein, The abutment block (303) penetrates the inner wall of the trigger groove (301) and extends to the inside of the first slide groove (304); the trigger groove (301), the first slide groove (304) and the second slide groove (305) are in communication with each other; a slope is provided on one side of the abutment block (303) of the slide plate (306); the bottom of the abutment block (303) abuts against the slope of the slide plate (306); and the slide plate (306) is elastically connected to the inner wall of the second slide groove (305) via an elastic member (308).
9. The post-cast reserved hole integrated formwork that is free of support and demolition according to claim 7, characterized in that, The abutment plate (307) passes through the inner wall of the second slide groove (305) and extends to a side of the bulkhead (103) away from the angle steel (104). The abutment plate (307) is located on a side of the rubber strip (108) close to the bulkhead (103). The bottom of the angle steel (104) abuts against the top of the trigger plate (302).
10. A construction method for an integrated formwork for post-cast reserved holes that is free of support and demolition, which is applied to the integrated formwork for post-cast reserved holes that is free of support and demolition described in claims 1-9, and is characterized in that: The construction method is as follows: S1. First, place the processed steel plate (101) adapted to the reserved hole (202) on a workbench on the floor below the reserved hole (202), align the fixing hole (102) on the steel plate (101) with the opening (203) drilled on the concrete floor (201), and insert the M16 screw head downward from the bottom of the steel plate (101) into each fixing hole (102), and weld the screw head to the bottom surface of the steel plate (101) so that the screw and the steel plate (101) are firmly fixed, wherein the length of the screw needs to be slightly greater than the thickness of the concrete floor (201) plus the height of the subsequent nut, and at the same time, the length of the part of the screw that protrudes above the concrete floor (201) cannot be greater than the thickness of the subsequent concrete floor (201) surface plastering, so as to avoid the need to cut the screw part that protrudes too much from the ground during the subsequent floor decoration; S2. Then, a lifting rope is lowered from the top of the reserved hole (202), and the bottom end of the lifting rope is tied to the short steel (109) on the steel plate (101). In addition, a plurality of traction ropes are prepared, the number of which is the same as the number of fixing holes (102). Each traction rope is inserted from top to bottom into each opening (203) of the concrete floor slab (201), and the bottom end of the traction rope is tied to the screw on the steel plate (101). Then, the lifting rope is pulled up to lift the steel plate (101) below the hole. Finally, the screw in the steel plate (101) is inserted into the concrete floor slab (201) through the traction of the traction rope. 01) and the opening (203), and on the surface of the concrete floor slab (201), a gasket is put on the screw and a nut is put on, and the gasket is screwed to the top of the concrete floor slab (201) with the nut, so that the screw and the concrete floor slab (201) are fixed together, and finally the steel plate (101) welded with the screw is tightly fixed to the floor slab, and the rubber strip (108) is against the bottom of the concrete floor slab (201), and the partition frame (103) is moved to the inside of the reserved hole (202), at this time, the lifting rope and the traction rope are untied, and a sealing strip is attached to the boundary line where the edge of the hole contacts the steel plate (101); S3. At the same time, for an opening with a length or width greater than 1 m, in order to compensate for the insufficient bearing capacity of the steel plate (101) for the subsequent short steel and concrete, a plurality of angle steels (104) need to be placed on the steel plate (101) so that they abut against the top of the trigger plate (302), and the contact portion between the angle steel (104) and the trigger plate (302) is welded, and then the angle steel (104) is pressed downward to drive the trigger plate (302) downward. The downward movement of the trigger plate (302) will squeeze the inclined surface of the slide plate (306) to move it away from the abutment block (303), and drive the abutment plate (307) to abut against the inner wall of the reserved hole (202) and squeeze the elastic member (307). 8), at this time, the groove (105) on the angle steel (104) is abutted against the inner wall of the partition frame (103), and then the partition frame (103) and the angle steel (104) and the bottom of the angle steel (104) and the inner wall of the trigger groove (301) are welded, and then a steel square tube (107) is placed parallel to each angle steel (104), so that the two ends of the steel square tube (107) are placed on the concrete floor (201) at the edge of the reserved hole (202), and at the same time, a plurality of small steel sheets (106) are welded to the sides of the angle steel (104) and the steel square tube (107) between each angle steel (104) and the steel square tube (107) above it by fillet welding; S4. Finally, install steel bars on the steel plate (101) in the reserved hole (202). When installing the main bars perpendicular to the length direction of the angle steel (104), the dimensions can be measured in advance and the steel bars can be prepared in segments. At the part where the steel bar contacts the side surface of the angle steel (104), weld the end of the steel bar to the side surface. Finally, connect the segmented steel bars with the angle steel (104) to form a whole to ensure the integrity of the main bars. Then pour slightly expanded concrete into the reserved hole (202) until the pouring surface reaches the plate surface of the surrounding concrete floor slab (201). Pay attention to vibrating during pouring and properly maintain the newly poured concrete at the reserved hole (202). After the concrete in the hole area reaches a certain strength, cut the small steel pieces (106) protruding on the concrete surface, then the steel square tubes (107) can be removed and reused. Among them, the steel plate (101) and the screw at the bottom of the concrete floor slab (201) do not need to be removed and are retained as a permanent structure.