Post-cast strip structure adopting inflatable assembly and process thereof

Abstract

The application discloses a post-pouring belt structure adopting an inflation assembly and a process thereof, and relates to the technical field of building construction. The post-pouring belt structure comprises a beam module and a plate module, and the beam module and the plate module are integrally poured. The beam module comprises post-pouring belt beam steel bars connecting two sides of beam concrete, and beam post-pouring belt sealing air bags arranged between the two groups of beam concrete and used for limiting the post-pouring belt beam steel bars. The plate module comprises post-pouring belt plate steel bars connecting two sides of plate concrete, and plate post-pouring belt sealing air bags arranged between the two groups of plate concrete and used for limiting the post-pouring belt plate steel bars. The application has the advantages directly embodied by the sealing feature, fundamentally eliminates the performance damage of components caused by factors such as steel bar corrosion and water accumulation organic caused by the long-term exposure of the traditional post-pouring belt, and has the advantages directly embodied by the shaping feature. The shaped high-pressure air bag can not only accurately position the steel bars through wrapping, but also effectively ensure that the adjacent concrete does not intrude into the post-pouring belt space.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a post-cast strip structure using inflatable components and its process. Background Technology

[0002] Currently, with the deepening of urbanization in my country, the size of individual building spaces in cities is becoming increasingly larger. When constructing long reinforced concrete components, various factors necessitate the use of different types of post-cast strips. The typical construction method for post-cast strips involves simultaneously constructing supports, formwork, and reinforcing steel tying in the post-cast strip and the normal pouring area. Various isolation measures are used to prevent concrete from the normal pouring area from entering the post-cast strip. Once the post-cast strip reaches the required pouring conditions, concrete with properties superior to adjacent concrete (strength, expansion, and shrinkage compensation) is poured. Finally, the formwork and supports of the post-cast strip are removed. This traditional "open" construction method for post-cast strips leads to many problems and potential risks.

[0003] This method has the following disadvantages: (1) Traditional open isolation measures are affected by complex environmental conditions, and most of the isolation effects cannot meet expectations, and most of them need to be chiseled and cleaned. (2) The waiting time for pouring traditional open post-pouring strips is long, and problems such as exposed steel bars corrosion and water accumulation and organic matter seriously affect the performance of components frequently occur. (3) The safety hazards of traditional open post-pouring strips are long-term. Generally, the width required by the specification is 80cm-120cm. Before the post-pouring strip is poured, it belongs to the key area of ​​edge protection. During the pouring of the post-pouring strip, there is a risk of vertical cross construction. (4) It is difficult to protect the finished steel bars in traditional open post-pouring strips. They need to be reorganized and repositioned before pouring. (5) Traditional open post-pouring strips are prone to secondary pollution of the completed work surface after pouring, and the level of civilized construction is low. Therefore, a post-pouring strip structure and its process using inflatable components are needed now. Summary of the Invention

[0004] The purpose of this invention is to provide a post-cast strip structure and its process using an inflatable component. By replacing the process of installing open isolation measures in the traditional post-cast strip with a process of setting up and inflating a shaped high-pressure airbag, the technical problems mentioned in the background art are solved.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a post-cast strip structure using an inflatable component, comprising a beam module and a slab module, wherein the beam module and the slab module are cast as a single unit;

[0006] The beam module includes post-cast strip beam reinforcement connecting the concrete of the two beams, and a beam post-cast strip sealing airbag set between the two sets of beam concrete to limit the post-cast strip beam reinforcement.

[0007] The slab module includes post-cast strip reinforcement connecting the concrete of both sides of the slab, and a slab post-cast strip sealing airbag disposed between the two sets of slab concrete for limiting the post-cast strip reinforcement.

[0008] Preferably, both the beam post-cast strip sealing airbag and the slab post-cast strip sealing airbag are high-pressure airbags, and the high-pressure airbags include wall panel general type, beam customized type, and compensation type airbags. The high-pressure airbag has a grouting hole reserved below the post-cast strip, and a grouting pipe is inserted inside the grouting hole. The high-pressure airbag has an air hole reserved above the post-cast strip, and an air pipe is inserted inside the air hole.

[0009] A construction process for sealing the post-cast strip of an inflatable component includes the following steps:

[0010] S1. Construction preparation: Establish a three-dimensional model of the post-pouring strip based on BIM technology, reserve standard width post-pouring strips and maintain the traditional support formwork system;

[0011] S2. High-pressure airbag preparation: Prefabricate a high-pressure airbag system in segments according to the three-dimensional model. The system includes general-purpose airbags for walls and slabs, nested airbags for beams, and compensation airbags. Each airbag is provided with a grouting hole at the bottom and an air hole at the top.

[0012] S3. Install and position the high-pressure airbags in sequence according to the parts: install them separately for beam modules and plate modules;

[0013] Beam module: When tying the beam stirrups to the post-cast strip position, the beam is inserted into the gap of the main reinforcement with nested airbags so that the ABS board surface is attached to the stirrups and tied and fixed.

[0014] Slab formwork: After the reinforcement is tied, insert the wall and slab universal airbags into the post-pouring strip in sections to make the ABS slab surface fit tightly against the formwork.

[0015] S4. Graded inflation molding: Inflate the wall, beam and slab in order from bottom to top. Inflate the wall and beam airbags to 0.25MPa and the slab airbags to 0.11MPa, and hold the pressure until the adjacent concrete has initially set.

[0016] S5. Perform expansion mortar grouting in sequence: After the structure has settled and stabilized, grout from bottom to top in the order of wall, beam and slab, with a grouting pressure of 0.3-0.5MPa and a grout spread of ≥600mm.

[0017] Preferably, in step S1, the workers are first familiarized with the drawings, and the plan, drawings, and construction process are explained in detail. The construction materials and equipment are inspected to ensure that they can be put into use. The post-pouring strip is reserved with a width of 10cm. Isolation measures are not required. The support and formwork of the post-pouring strip are constructed according to the traditional construction method. BIM technology is used to construct the three-dimensional structure of the closed space of the post-pouring strip. The high-pressure airbags are produced in sections and models by the chemical fiber textile processing plant according to the site requirements.

[0018] Preferably, in step S2, the airbag is made of aramid polyester composite material. The wall and panel universal airbag is made of a single layer of aramid polyester composite layer and a 3mm ABS board composite structure. The beam nested type includes peripheral airbags and internal airbags. The periphery of the beam nested type is made of single layer of aramid polyester composite + ABS board. The interior of the beam nested type is made of double layer of aramid + butyl rubber flexible structure. The compensating airbag is made of double layer of aramid + butyl rubber flexible structure.

[0019] Preferably, in step S3, when installing the beam with airbags, the airbags are installed simultaneously during the process of binding the stirrups at the post-pouring strip position, with the grouting holes leading out from the bottom of the beam formwork and the air holes leading out from the top.

[0020] The length of each wall and panel airbag segment should be ≤2m, and the installation spacing should be ≤800mm.

[0021] When tying the beam stirrups, once the stirrups reach the predetermined position of the post-cast strip, insert custom-made nested airbags through the main beam reinforcement and place them at the predetermined position of the post-cast strip. Ensure the plastic surface of the airbag is in contact with the beam stirrups and secure it. Continue tying the remaining stirrups until the entire beam is tied. When closing the formwork, lead the grouting holes out from under the beam formwork and close them, and lead the air holes out from above and close them.

[0022] After the wall and slab reinforcement is tied, the universal airbags for walls and slabs are inserted into the predetermined positions of the post-pouring strip in sections from the reinforcement spacing. Ensure that the plastic panels of the airbags are in contact with the pouring formwork and are tied and fixed. When the pouring formwork is closed, the grouting holes are led out from the bottom of the formwork and sealed, and the air holes are led out from the top and sealed.

[0023] Preferably, in step S4, following the overall sequence of first the wall post-pouring strip, then the beam post-pouring strip, and finally the slab post-pouring strip, an air-inflating device is used to inflate the airbags from bottom to top through the air holes leading out of each airbag. After inflation, the pressure is maintained until the adjacent concrete reaches initial setting.

[0024] Preferably, the test pressure of the wall and beam airbags is 0.25 MPa, the test pressure of the slab airbags is 0.11 MPa, the inflation pressure fluctuation value is ≤5%, and after inflation, the density of the airbag and the concrete contact surface is tested by ultrasonic testing, with a deviation value of ≤3 mm.

[0025] Preferably, in step S5, after the conditions for pouring the post-pouring strip are met, the grouting holes and air holes of each airbag are opened, and grouting equipment is used to inject grout from the bottom up through the grouting holes of each airbag in the overall order of first the wall post-pouring strip, then the beam post-pouring strip, and finally the slab post-pouring strip. The grout used for grouting meets the general performance requirements of the post-pouring strip concrete in the specifications.

[0026] Preferably, the grouting in step S5 must meet the following conditions: the structural settlement stabilization period is ≥60 days, the ambient temperature is ≤25℃, the air holes are opened simultaneously during grouting as exhaust channels, the expansion rate of the expansive mortar is controlled at 1.5-2%, and the grouting fullness is verified by ultrasonic testing after grouting is completed, with a void ratio of ≤0.3%.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The post-pouring strip construction method of this process is "closed", which avoids the open operation of traditional post-pouring strip construction, greatly reduces or eliminates the occurrence of potential problems, and thus solves the problem. It has the advantage of being closed, and fundamentally eliminates the damage to the component performance caused by factors such as steel corrosion and water accumulation caused by long-term exposure of traditional post-pouring strips.

[0029] 2. This process also has the advantage of directly manifesting its shaping characteristics. The use of shaping high-pressure airbags can not only accurately position the steel bars by wrapping them, but also effectively ensure that the adjacent concrete does not intrude into the space of the post-pouring strip, reducing the probability of leakage problems in the adjacent concrete. After inflation, the shaping airbags fully wrap and accurately position the steel bars, reducing the occurrence of situations where the steel bars need to be repositioned.

[0030] 3. It indirectly reduces the difficulty of safety management during the waiting and implementation stages of pouring. By pre-sealing the post-pouring strip, the strict safety management of the edge of the post-pouring strip is indirectly changed to a general safety supervision condition. By using the bladder-type injection bag for high-pressure grouting during pouring, the strict safety management of vertical cross construction is indirectly changed to a general safety supervision condition. It also eliminates the need for installation and removal of post-pouring strip isolation measures, as well as cleaning and chiseling procedures, thereby reducing the amount of concrete used, reducing safety and quality risks, improving the level of civilized construction, and indirectly reducing construction costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the bottom structure of the positioning frame body of the present invention;

[0033] Figure 3 This is a schematic diagram showing the disassembled installation structure of the engraving module of the present invention;

[0034] Figure 4 This is a flowchart of the construction process of the present invention.

[0035] In the diagram: 1. Reinforcing steel of the post-cast strip beam; 2. Reinforcing steel of the post-cast strip slab; 3. Beam concrete; 4. Slab concrete; 5. Grouting pipe; 6. Air pipe; 7. Sealing airbag of the post-cast strip beam; 8. Sealing airbag of the post-cast strip slab. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1-3 As shown, the present invention provides a post-cast strip structure using an inflatable component, including a beam module and a slab module, wherein the beam module and the slab module are cast as a single unit.

[0039] The beam module includes post-cast strip beam reinforcement 1 connecting the two beam concrete 3s, and beam post-cast strip sealing airbag 7 set between the two sets of beam concrete 3s to limit the post-cast strip beam reinforcement 1.

[0040] The slab module includes post-cast strip reinforcement 2 connecting the two side slab concrete 4, and a slab post-cast strip sealing airbag 8 set between the two sets of slab concrete 4 to limit the post-cast strip reinforcement 2.

[0041] Both the beam post-cast strip sealing airbag 7 and the slab post-cast strip sealing airbag 8 are high-pressure airbags. The high-pressure airbags include general-purpose wall panel type, customized beam type, and compensation type airbags. The high-pressure airbags have grouting holes reserved below the post-cast strip, and grouting pipes 5 are inserted inside the grouting holes. The high-pressure airbags have air holes reserved above the post-cast strip, and air pipes 6 are inserted inside the air holes.

[0042] like Figure 4 As shown, the present invention also provides a post-cast strip sealing construction process for an inflatable component, comprising the following steps:

[0043] S1. Construction Preparation: Based on BIM technology, a 3D model of the post-cast strip is established. A standard width post-cast strip is reserved, and the traditional support formwork system is maintained. First, the drawings are familiarized, and the workers are given a detailed briefing on the plan, drawings, construction process, etc. The construction materials and equipment are inspected to ensure that they can be put into use. The post-cast strip is reserved at a width of 10cm. Isolation measures are not required. The support and formwork of the post-cast strip are constructed according to the traditional construction method. Using BIM technology, a 3D structure of the closed space of the post-cast strip is constructed. The high-pressure airbags are produced in sections and models by the chemical fiber textile processing plant according to the site requirements.

[0044] S2. High-pressure airbag fabrication: Based on the three-dimensional model, the high-pressure airbag system is prefabricated in segments. The system includes wall and slab general-purpose airbags, beam nested airbags, and compensation airbags. Each airbag has grouting holes at the bottom and air holes at the top. The airbags are made of aramid polyester composite material. The wall and slab general-purpose airbags use a single-layer aramid polyester composite layer and a 3mm ABS board composite structure. The beam nested airbags include peripheral airbags and internal airbags. The periphery of the beam nested airbags uses a single-layer aramid polyester composite + ABS board, and the interior of the beam nested airbags uses a double-layer aramid + butyl rubber flexible structure. The compensation airbags use a double-layer aramid + butyl rubber flexible structure.

[0045] S3. Install and position the high-pressure airbags in sequence according to the parts: install them separately for beam modules and plate modules;

[0046] Beam formwork: When tying the beam stirrups to the post-pouring strip position, insert nested airbags into the gaps between the main reinforcement bars to make the ABS board surface fit against the stirrups and fix it; Slab formwork: After the reinforcement is tied, insert the wall and slab universal airbags into the post-pouring strip position in sections to make the ABS board surface fit tightly against the formwork.

[0047] When installing airbags for beams, the airbags are inserted simultaneously during the binding of the stirrups at the post-cast strip location. Grouting holes are led out from the bottom of the beam formwork, and air holes from the top. The segment length of the wall and slab airbags should be ≤2m, and the installation spacing ≤800mm. When binding the beam stirrups, when the stirrups reach the predetermined position of the post-cast strip, the customized nested airbags for the beam are passed through the main beam reinforcement and placed at the predetermined position of the post-cast strip, ensuring the plastic panel of the airbag adheres to the beam stirrups and is secured. The remaining stirrups are then bound until the entire beam is bound. When closing the formwork, the grouting holes are led out from the bottom of the beam formwork and sealed, and the air holes are led out from the top and sealed. After the wall and slab reinforcement is bound, the universal wall and slab airbags are inserted segment by segment into the predetermined position of the post-cast strip from the reinforcement spacing, ensuring the plastic panel of the airbag adheres to the casting formwork and is secured. When closing the casting formwork, the grouting holes are led out from the bottom of the formwork and sealed, and the air holes are led out from the top and sealed.

[0048] S4. Graded Inflatable Molding: Inflate the walls, beams, and slabs from bottom to top. Inflate the wall and beam airbags to 0.25 MPa and the slab airbags to 0.11 MPa. Hold the pressure until the adjacent concrete has initially set. Following the overall sequence of first the wall post-cast strip, then the beam post-cast strip, and finally the slab post-cast strip, use the inflation equipment to inflate the airbags from bottom to top through the air holes. After inflation, hold the pressure until the adjacent concrete reaches initial setting. The test pressure for the wall and beam airbags is 0.25 MPa, and the test pressure for the slab airbags is 0.11 MPa. The inflation pressure fluctuation value is ≤5%. After inflation, the density of the airbag-concrete contact surface is tested by ultrasonic testing, and the deviation value is ≤3 mm.

[0049] S5. Perform expansive mortar grouting in sequence: After the structure has settled and stabilized, grout from bottom to top in the order of wall, beam, and slab. The grouting pressure is 0.3-0.5MPa, and the grout spread is ≥600mm. After the conditions for post-cast strip pouring are met, open the grouting holes and air holes of each air bladder. In the overall order of first wall post-cast strip, then beam post-cast strip, and finally slab post-cast strip, use grouting equipment to grout from bottom to top through the grouting holes led out from each air bladder. The grout used for grouting meets the general performance requirements for post-cast strip concrete in the specifications. Grouting must meet the following conditions: structural settlement stabilization period ≥60d, ambient temperature ≤25℃, air holes are opened simultaneously during grouting as exhaust channels, the expansion rate of the expansive mortar is controlled at 1.5-2%, and the fullness of grouting is verified by ultrasonic testing after grouting, with a void ratio ≤0.3%.

[0050] Specifically, by replacing the traditional process of setting up isolation measures for post-pouring strips with a process of installing and inflating pre-shaped high-pressure airbags, and by replacing the traditional open pouring process for post-pouring strips with a closed high-pressure grouting process, this innovative approach, using new materials, breaks through the traditional open pouring technology for post-pouring strips. It eliminates a series of quality problems associated with open construction, reduces the difficulty of safety management, ensures the accuracy of rebar positioning, and thus improves the integrity of post-pouring components and pre-pouring components. It also enhances the level of civilized construction at the construction site.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A post-cast strip structure employing an inflatable component, characterized in that: It includes beam modules and slab modules, which are cast as a single unit; The beam module includes a post-cast strip beam reinforcement (1) that connects the two beam concrete (3) and a beam post-cast strip sealing airbag (7) set between the two sets of beam concrete (3) to limit the post-cast strip beam reinforcement (1). The slab module includes a post-cast strip slab reinforcement (2) connecting the two side slab concrete (4), and a slab post-cast strip sealing airbag (8) set between the two slab concrete (4) for limiting the post-cast strip slab reinforcement (2). Both the beam post-cast strip sealing airbag (7) and the slab post-cast strip sealing airbag (8) are high-pressure airbags, and the high-pressure airbags include wall and slab general type, beam nested type and compensation type airbags. The high-pressure airbags have grouting holes reserved below the post-cast strip, and grouting pipes (5) are inserted inside the grouting holes. The high-pressure airbags have air holes reserved above the post-cast strip, and air pipes (6) are inserted inside the air holes. The airbags are made of aramid polyester composite material. The wall and slab general-purpose airbags use a single-layer aramid polyester composite layer and a 3mm ABS board composite structure. The nested type for beams includes peripheral airbags and internal airbags. The peripheral airbags of the nested type for beams use a single-layer aramid polyester composite + ABS board, and the internal airbags of the nested type for beams use a double-layer aramid + butyl rubber flexible structure. The compensation type airbags use a double-layer aramid + butyl rubber flexible structure. The post-cast strip structure is closed, avoiding the open operation of post-cast strip construction and fundamentally eliminating the damage to component performance caused by steel corrosion and water accumulation due to long-term exposure of the post-cast strip.

2. A closed construction process for the post-cast strip structure using inflatable components as described in claim 1, characterized in that: Includes the following steps: S1. Construction preparation: Establish a three-dimensional model of the post-pouring strip based on BIM technology, reserve standard width post-pouring strips and maintain the traditional support formwork system; S2. High-pressure airbag preparation: Prefabricate a high-pressure airbag system in segments according to the three-dimensional model. The system includes general-purpose airbags for walls and slabs, nested airbags for beams, and compensation airbags. Each airbag is provided with a grouting hole at the bottom and an air hole at the top. S3. Install and position the high-pressure airbags in sequence according to the parts: install them separately for beam modules and plate modules; Beam module: When tying the beam stirrups to the post-cast strip position, the beam is inserted into the gap of the main reinforcement with nested airbags so that the ABS board surface is attached to the stirrups and tied and fixed. Slab formwork: After the reinforcement is tied, insert the wall and slab universal airbags into the post-pouring strip in sections to make the ABS slab surface fit tightly against the formwork. S4. Graded inflation molding: Inflate the wall, beam and slab in order from bottom to top. Inflate the wall and beam airbags to 0.25MPa and the slab airbags to 0.11MPa, and hold the pressure until the adjacent concrete has initially set. S5. Perform expansion mortar grouting in sequence: After the structure has settled and stabilized, grout from bottom to top in the order of wall, beam and slab, with a grouting pressure of 0.3-0.5MPa and a grout spread of ≥600mm.

3. The closed construction process for a post-cast strip structure using an inflatable component according to claim 2, characterized in that: In step S1, the drawings are first familiarized with, and the workers are given a detailed briefing on the plan, drawings, and construction process. The construction materials and equipment are inspected to ensure that they can be put into use. The post-pouring strip is reserved at a width of 10cm. Isolation measures are not required. The support and formwork of the post-pouring strip are constructed according to the traditional construction method. BIM technology is used to construct the three-dimensional structure of the closed space of the post-pouring strip. The high-pressure airbags are produced in sections and models by the chemical fiber textile processing plant according to the site requirements.

4. The closed construction process for a post-cast strip structure using an inflatable component according to claim 3, characterized in that: In step S3, when the beam is installed using nested airbags, the airbags are inserted simultaneously during the process of binding the stirrups at the post-pouring strip position. The grouting holes are led out from the bottom of the beam formwork, and the air holes are led out from the top. The length of each wall and panel airbag segment should be ≤2m, and the installation spacing should be ≤800mm. When tying the beam stirrups, once the stirrups reach the predetermined position on the post-cast strip, insert custom-made nested airbags through the main beam reinforcement and place them at the predetermined position on the post-cast strip. Ensure the plastic surface of the airbag is flush with the beam stirrups and secure it. Continue tying the remaining stirrups until the entire beam is tied. When closing the formwork, lead the grouting holes out from under the beam formwork and seal them, and lead the air holes out from above and seal them. After the wall and slab reinforcement is tied, the universal airbags for walls and slabs are inserted into the predetermined positions of the post-pouring strip in sections from the reinforcement spacing. Ensure that the plastic panels of the airbags are in contact with the pouring formwork and are tied and fixed. When the pouring formwork is closed, the grouting holes are led out from the bottom of the formwork and sealed, and the air holes are led out from the top and sealed.

5. The closed construction process for a post-cast strip structure using an inflatable component according to claim 4, characterized in that: In step S4, following the general order of first the wall post-cast strip, then the beam post-cast strip, and finally the slab post-cast strip, an air-inflating device is used to inflate the airbags from bottom to top through the air holes leading out of each airbag. After inflation, the pressure is maintained until the adjacent concrete reaches initial setting.

6. The closed construction process for a post-cast strip structure using an inflatable component according to claim 5, characterized in that: The test pressure of the airbags for walls and beams is 0.25 MPa, and the test pressure of the airbags for slabs is 0.11 MPa. The inflation pressure fluctuation value is ≤5%. After inflation, the density of the airbag and the concrete contact surface is tested by ultrasonic testing, and the deviation value is ≤3 mm.

7. The closed construction process for a post-cast strip structure using an inflatable component according to claim 6, characterized in that: In step S5, after the conditions for post-cast strip pouring are met, the grouting holes and air holes of each airbag are opened. Following the general order of first wall post-cast strip, then beam post-cast strip, and finally slab post-cast strip, grouting equipment is used to grout from bottom to top through the grouting holes led out of each airbag. The grout used for grouting meets the general performance requirements of post-cast strip concrete in the specifications.

8. The closed construction process for a post-cast strip structure using an inflatable component according to claim 7, characterized in that: The grouting in step S5 must meet the following conditions: the structural settlement stabilization period is ≥60 days, the ambient temperature is ≤25℃, the air holes are opened simultaneously during grouting as exhaust channels, the expansion rate of the expansion mortar is controlled at 1.5-2%, and the grouting fullness is verified by ultrasonic testing after grouting is completed, with a void ratio of ≤0.3%.

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