A kind of annular thin-walled frame balcony cast-in-place formwork and construction method

Abstract

The application relates to the technical field of balcony cast-in-place formwork, and particularly discloses a ring-shaped thin-wall frame balcony cast-in-place formwork and a construction method. The ring-shaped thin-wall frame balcony cast-in-place formwork comprises a bottom form, a vertical form and a top form arranged on the outer side wall of a dormitory building, the bottom form, the vertical form and the top form are provided with openings close to the side wall of the dormitory building, a plurality of exhaust holes are formed in the inner side wall of the bottom form and the outer side wall of the top form, the side wall of the top form is connected with a grout inlet pipe, the bottom form, the vertical form and the top form are respectively provided with an outer layer, an inner layer and a pouring layer, the vertical form is provided with sliding strips protruding from both ends in the height direction, the side wall of the bottom form and the top form is recessed with guide rails for the sliding strips to slide, and the inner side wall of the bottom form, the vertical form and the top form is protruding with connecting plates for fixing the position of the top form. The vertical form and the top form are quickly installed and poured, so that the concrete in the ring-shaped thin-wall frame balcony cast-in-place formwork can be mixed together, and the stability of the ring-shaped thin-wall frame balcony can be improved.

Description

Technical Field

[0001] This invention relates to the field of cast-in-place formwork technology for balconies, and in particular to a ring-shaped thin-walled frame cast-in-place formwork for balconies and its construction method. Background Technology

[0002] A balcony is an extension of the interior of a building, a place for residents to breathe fresh air, dry clothes, and place potted plants. Currently, balconies in Chinese houses are generally constructed by pouring concrete into the balcony formwork, and typically consist of a load-bearing base wall protruding from the interior and railings built on the base wall.

[0003] When constructing balconies for primary school dormitories, given the limited safety awareness of primary school students, conventional balconies are insufficient to guarantee their safety. Therefore, construction companies typically design the balconies as ring-shaped, and for aesthetic purposes, the balcony walls are often thin-walled. When pouring the concrete for the ring-shaped thin-walled frame balcony, the formwork is divided into three parts: a bottom formwork, vertical formwork, and a top formwork. The bottom formwork is first installed on the outer wall of the dormitory building, then poured. After the concrete has solidified and cured, the bottom formwork is removed. Next, the vertical formwork is installed on the outer wall of the dormitory building, connecting it to the bottom concrete. Concrete is then poured onto the vertical formwork, and this process is repeated until the entire ring-shaped thin-walled frame balcony is completed. However, when pouring the ring-shaped thin-walled frame balcony using this method, cold joints can occur during segmented pouring, creating a weak bonding surface at the concrete joint and affecting the stability of the ring-shaped thin-walled frame balcony. Therefore, there is still room for improvement. Summary of the Invention

[0004] To improve the stability of the annular thin-walled frame balcony after casting, this invention provides a cast-in-place formwork and construction method for annular thin-walled frame balconies.

[0005] In a first aspect, the present invention provides a cast-in-place formwork for a ring-shaped thin-walled frame balcony, employing the following technical solution:

[0006] A cast-in-place formwork for a ring-shaped thin-walled frame balcony includes a bottom formwork, a vertical formwork, and a top formwork installed on the outer wall of a dormitory building. The bottom formwork, vertical formwork, and top formwork have openings near the side wall of the dormitory building. The inner side wall of the bottom formwork and the outer side wall of the top formwork have several vent holes. The side wall of the top formwork is connected to a grout inlet pipe. The bottom formwork, vertical formwork, and top formwork are respectively provided with an outer layer, an inner layer, and a casting layer. Sliding strips protrude from both ends of the vertical formwork along the height direction. The side walls of the bottom formwork and top formwork are recessed with guide rails for sliding the sliding strips. The inner side walls of the bottom formwork, vertical formwork, and top formwork all have protruding connecting plates for fixing the position of the top formwork.

[0007] Using the above technical solution, through the setting of sliding strips on the vertical mold and guide rails on the bottom and top molds, after the construction party has installed and poured the bottom mold, the sliding strip of the vertical mold at the end closest to the bottom mold along the height direction is aligned with the guide rail on the bottom mold, and then the sliding strip is inserted into the guide rail, connecting the vertical mold and the bottom mold. Before the concrete in the bottom mold has solidified, concrete is quickly poured into the vertical mold, so that the concrete in the bottom mold mixes with the concrete in the vertical mold. Then, the guide rail of the top mold is aligned with the sliding strip of the vertical mold at the end furthest from the bottom mold along the height direction, and the sliding strip of the vertical mold at the end furthest from the bottom mold is inserted into the guide rail of the top mold. This allows for rapid installation of the top and vertical formwork. Before the concrete in the vertical formwork hardens, concrete is injected into the grouting pipe, mixing the concrete in the top and vertical formwork. This helps reduce the occurrence of cold joints at the joints between the bottom and vertical formwork or between the vertical and top formwork due to the hardening of the concrete in the bottom or vertical formwork, thus improving the stability of the annular thin-walled frame balcony. Simultaneously, it facilitates rapid installation of the bottom and vertical formwork, as well as the vertical and top formwork, saving installation time and increasing efficiency.

[0008] The present invention is further configured such that: the slider gradually tapers along the length direction, and the direction in which the slider at one end of the vertical mold gradually tapers along the height direction is opposite to the direction in which the slider at the other end gradually tapers.

[0009] Using the above technical solution, when installing the vertical mold, align the end of the vertical strip closest to the bottom mold along the height direction with the end with the smaller vertical cross-sectional area along the length direction of the vertical strip of the vertical mold to the guide rail of the bottom mold. Then, insert the vertical strip closest to the bottom mold along the height direction into the guide rail of the bottom mold, thus connecting the vertical mold and the bottom mold. When installing the top mold, align the guide rail of the top mold with the end of the vertical strip furthest from the bottom mold along the height direction of the vertical mold with the end with the smaller vertical cross-sectional area of ​​the vertical strip of the vertical mold. Then, insert the vertical strip furthest from the bottom mold along the height direction into the guide rail of the top mold, thus connecting the top mold and the vertical mold. Through the arrangement of the strips, when the strip is inserted into the guide rail, due to the strip's length direction... The area of ​​the vertical cross-section at one end is smaller than the area of ​​the vertical cross-section at one end of the guide rail opening along the length direction, making it easier to insert the slider into the guide rail. This reduces the time required for the slider to align with the guide rail opening before insertion, allowing for faster installation of the bottom formwork and vertical formwork, or the vertical formwork and top formwork. This also helps reduce the possibility of cold joints forming at the connection between the bottom formwork and vertical formwork, or the vertical formwork and top formwork, due to excessive installation time. This improves the stability of the annular thin-walled frame balcony.

[0010] The invention is further configured such that: the slide bar is provided with a stabilizing element for enhancing the stability of the track near the side wall of the vertical mold casting layer.

[0011] By adopting the above technical solution, the stability of the side walls at the connection between the bottom formwork and the vertical formwork, as well as the side walls at the connection between the top formwork and the vertical formwork, is increased through stabilizing components. This helps to reduce the deformation of the side walls at the connection between the bottom formwork and the top formwork after concrete is poured into the vertical formwork, which is prone to deformation due to the recessed guide rails. This also helps to protect the cast-in-place formwork of the annular thin-walled frame balcony and improves the quality of the annular thin-walled frame balcony.

[0012] The present invention is further configured such that: the stabilizing member is a push rod that is slidably connected to the side wall of the slide bar near the vertical mold casting layer; a plurality of push rods are provided, and the plurality of push rods are evenly distributed on the slide bar; the slide bar is provided with a driving member for driving the stabilizing member to move in a direction away from or near the vertical mold casting layer.

[0013] Using the above technical solution, after the bottom mold is connected to the vertical mold or the vertical mold is connected to the top mold, the driving component is used to move the push rod towards the pouring layer of the vertical mold. This causes the side wall of the push rod near the pouring layer of the vertical mold to abut against the side wall of the guide rail. When concrete is injected into the vertical mold or the top mold, the force of the push rod abutting against the side wall of the guide rail offsets part of the pressure of the concrete on the side of the bottom mold connection or the side wall of the top mold connection. This makes it less likely for the side walls of the bottom mold and the top mold connection to deform, and makes the annular thin-walled frame balcony less prone to deformation after pouring. This is beneficial for protecting the cast-in-place formwork of the annular thin-walled frame balcony.

[0014] The invention is further configured such that: the driving component includes a sliding rack slidably connected within a slide bar; the side wall of the slide bar has a sliding hole for the sliding rack to slide; the side wall of the push rod has a protruding push tooth; the driving component also includes a gear meshing with the push tooth; the gear meshes with the sliding rack; when the sliding rack is pushed to move towards the direction closer to the dormitory building, the sliding rack drives the gear to drive the stabilizing component to move towards the direction closer to the vertical mold casting layer.

[0015] By adopting the above technical solution, after the bottom mold is connected to the vertical mold or the vertical mold to the top mold, by pushing the sliding rack towards the end closer to the dormitory building, the rack drives the push rod to move towards the vertical mold casting layer, so that the side wall of one end of the push rod abuts against the side wall of the guide rail. By driving the sliding rack towards the end closer to or away from the dormitory building, the side wall of the push rod near the vertical mold casting layer can be made to abut against the side wall of the guide rail near the vertical mold casting layer, making the operation of the driving component simple and convenient, and saving the time of operating the driving component. Through the above settings, it is beneficial to improve the stability of the connection between the bottom mold and the top mold, and also to facilitate the rapid installation of the bottom mold and the vertical mold or the vertical mold and the top mold.

[0016] The present invention is further configured such that the push rod is provided with a protective element for reducing wear on the push rod.

[0017] By adopting the above technical solution and setting up protective components, it is beneficial to reduce the wear and tear on the sidewalls of the push rod and guide rail when the annular thin-walled frame balcony cast-in-place formwork is used for a long time. This wear and tear can lead to unevenness on one end of the push rod, reducing the contact area between the push rod and guide rail sidewalls and decreasing the contact force. This can easily cause deformation of the guide rail sidewalls after concrete is injected into the formwork, thus extending the service life of the annular thin-walled frame balcony cast-in-place formwork.

[0018] The invention is further configured such that: the side wall of the push rod near the vertical mold casting layer has a recessed groove, and the protective member is a rubber pad disposed in the groove, the rubber pad protruding from the side wall of the push rod near the vertical mold casting layer.

[0019] By adopting the above technical solution, the driving component drives the push rod to move towards the vertical mold casting layer, causing the rubber pad to move towards the vertical mold casting layer. This causes the rubber pad to abut against the side wall of the track, squeezing the rubber pad and placing it in a groove. Continuing to drive the push rod towards the vertical mold casting layer, the side wall of the push rod near the vertical mold casting layer abuts against the side wall of the guide rail near the vertical mold casting layer. This stabilizes the push rod against the side wall of the guide rail near the vertical mold casting layer. Through the rubber pad, during long-term use of the annular thin-walled frame balcony cast-in-place formwork, the side wall of the guide rail near the vertical mold casting layer will initially rub against the rubber pad, causing it to wear. Because the rubber pad is elastic, it continues to abut against the side wall of the guide rail, reducing the pressure of the guide rail side wall on the side wall of the push rod near the vertical mold casting layer, thus protecting the push rod and making it less prone to damage. Furthermore, the worn rubber pad can still be used normally, which helps extend the service life of the annular thin-walled frame balcony cast-in-place formwork.

[0020] Secondly, the present invention provides a construction method for cast-in-place formwork of annular thin-walled frame balcony, employing the following technical solution:

[0021] A construction method for cast-in-place formwork of annular thin-walled frame balcony includes the following steps:

[0022] Step 1: Install the bottom formwork on the outer wall of the dormitory building and pour concrete to form the bottom formwork;

[0023] Step 2: Before the concrete in the bottom mold has solidified, quickly install the vertical mold, and then pour concrete into the vertical mold to mix the concrete in the bottom mold with the concrete in the vertical mold.

[0024] Step 3: Before the concrete in the vertical mold has solidified, quickly install the top mold, and then pour concrete into the top mold to mix the concrete in the vertical mold with the concrete in the top mold.

[0025] Step 4: Allow the concrete inside the cast-in-place formwork of the annular thin-walled frame balcony to cure for more than 7 days, and then remove the formwork.

[0026] With the above setup, the vertical or top formwork is quickly installed before the concrete in the bottom or vertical formwork hardens, and concrete is poured into the vertical or top formwork in a timely manner. This allows the concrete in the bottom formwork and the vertical formwork to mix, making it less likely for cold joints to form at the joints between the concrete in the bottom formwork and the concrete in the vertical formwork or the concrete in the vertical formwork and the concrete in the top formwork. This helps improve the quality of the thin-walled frame balcony and better protects the safety of primary school students.

[0027] In summary, the present invention has the following beneficial effects:

[0028] 1. The use of sliding bars and guide rails helps to improve the stability of the annular thin-walled frame balcony.

[0029] 2. The design of the driving and stabilizing components helps to stabilize the sidewalls of the guide rail and extends the service life of the cast-in-place formwork for the annular thin-walled frame balcony. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a ring-shaped thin-walled frame balcony cast-in-place formwork.

[0031] Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle.

[0032] Figure 3 This is a schematic diagram of the overall structure of the vertical mold in a cast-in-place formwork for a ring-shaped thin-walled frame balcony.

[0033] Figure 4 yes Figure 3 A magnified structural diagram of section B.

[0034] Figure 5 This is a schematic diagram of the internal structure of the vertical mold in a cast-in-place formwork for a ring-shaped thin-walled frame balcony.

[0035] Figure 6 yes Figure 5 Enlarged structural diagram of section C.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Bottom mold; 2. Vertical mold; 3. Top mold; 31. Grout inlet pipe; 41. Outer layer; 42. Inner layer; 43. Casting layer; 44. Vent hole; 5. Sliding strip; 51. Stabilizer; 52. Drive component; 53. Sliding rack; 54. Gear; 55. Protective component; 6. Connecting plate; 7. Guide rail; 8. Pushing gear. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the embodiments.

[0039] Example 1

[0040] A type of cast-in-place formwork for a ring-shaped thin-walled frame balcony, see [link / reference]. Figure 1 as well as Figure 2 The system includes a bottom mold 1, a vertical mold 2, and a top mold 3 installed on the outer wall of the dormitory building. The bottom mold 1, vertical mold 2, and top mold 3 have openings near the side wall of the dormitory building. The bottom mold 1, vertical mold 2, and top mold 3 are respectively provided with an outer layer 41, an inner layer 42, and a casting layer 43. The vertical mold 2 consists of two pieces. Sliding strips 5 protrude from the side walls of both the inner layer 42 and the outer layer 41 along the height direction. The sliding strips 5 gradually taper along the length direction, and the direction in which the sliding strips 5 at one end of the vertical mold 2 gradually tapers is opposite to the direction at the other end. The sliding strips 5 have internal structures to reinforce the side walls of the casting layer 43 near the bottom mold 1 or the casting layer 43 of the top mold 3. The stabilizing component 51 provides stability. The inner layer 42 of the bottom mold 1 and the outer wall of the guide rail 7 of the bottom mold 1 and the outer layer 41 of the top mold 3 are both provided with vent holes 44. There are fifty vent holes 44, which are evenly distributed on the bottom of the bottom mold 1 and the top mold 3. The outer layer 41 and the inner layer 42 of the bottom mold 1 and the top mold 3 are all recessed with guide rails 7 for sliding strips 5 on the side near the vertical mold 2. The outer wall of the outer layer 41 of the top mold 3 is connected to the slurry inlet pipe 31. There are two slurry inlet pipes 31. The outer walls of the bottom mold 1, the vertical mold 2 and the inner layer 42 of the top mold 3 are all provided with connecting plates 6 for fixing the position of the top mold 3 plate. The center of the connecting plate 6 is provided with a connecting hole.

[0041] See Figure 3 as well as Figure 4The stabilizer 51 is a push rod that is slidably connected to the side wall of the casting layer 43 near the vertical mold 2 of the slide bar 5. In this embodiment, each slide bar 5 is provided with five push rods, and the push rods are evenly distributed on the slide bar 5. The side wall of the slide bar 5 near the casting layer 43 of the vertical mold 2 is recessed with a push groove for the push rod to be slidably connected. The slide bar 5 is also provided with a drive member 52 for driving the stabilizer 51 to move away from or towards the casting layer 43 of the vertical mold 2.

[0042] See Figure 5 as well as Figure 6 The driving component 52 includes a sliding rack 53 slidably connected to the slide bar 5. The side wall of one end of the slide bar 5 along the length direction has a sliding hole for the sliding rack 53 to slide. The sliding rack 53 protrudes from the side wall of the slide bar 5 away from the dormitory building. The side wall of the push rod has a push tooth 8 protruding. The driving component 52 also includes a gear 54 that meshes with the push tooth 8. In this embodiment, each slide bar 5 is provided with five gears 54. The gears 54 located in the same slide bar 5 mesh with the rack respectively. Each gear 54 located in the same slide bar 5 meshes with a different push tooth 8. The side wall of the sliding hole has a placement groove for the gear 54 to be placed. The side wall of the placement groove is connected to the side wall of the push groove. When the sliding rack 53 is pushed to move towards the outer side wall of the dormitory building, the rack drives the gear 54 to drive the push rod to move towards the casting layer 43 of the vertical mold 2.

[0043] See Figure 6 The push rod is equipped with a protective element 55 to reduce wear on the push rod. The side wall of the push rod near the casting layer 43 of the vertical mold 2 is recessed with a groove, and the protective element 55 is a rubber pad provided in the groove. The rubber pad protrudes from the side wall of the push rod near the casting layer 43 of the vertical mold 2.

[0044] The implementation principle of Example 1 is as follows:

[0045] When it is necessary to install the bottom formwork 1 of the cast-in-place formwork for the annular thin-walled frame balcony, the fixing screws will be pre-embedded in the dormitory building first. Then, the bottom formwork 1 will be connected to the outer wall of the dormitory building using steel bars. One end of the steel bar will be connected to the connecting plate 6 on the bottom formwork 1, and the end of the steel bar away from the bottom formwork 1 will be connected to the fixing screws in the dormitory building, so that the bottom formwork 1 can be installed on the outer wall of the dormitory building.

[0046] When installing the vertical formwork 2 of the cast-in-place formwork for the annular thin-walled frame balcony, align the side wall of the smaller vertical section end of the slide bar 5 on the vertical formwork 2 with the slide rail on the bottom formwork 1, and then insert the slide bar 5 of the vertical formwork 2 into the slide rail on the bottom formwork 1, so that the bottom formwork 1 and the vertical formwork 2 are connected. By using steel bars, one end of the steel bars is connected to the connecting plate 6 on the vertical formwork 2, and the end of the steel bars away from the vertical formwork 2 is connected to the fixing screw in the dormitory building, so that the vertical formwork 2 is stable on the outer wall of the dormitory building. Then, push the sliding rack 53 of the vertical formwork 2 along the height direction near the bottom formwork 1 towards the dormitory building, so that the sliding gear 54 drives the slide bar 5 inside the slide bar 5. The gear 54 rotates, causing the stabilizer 51 to move towards the casting layer 43 of the vertical mold 2. This causes the rubber pad on the stabilizer 51 to abut against the side wall of the bottom mold 1's slide rail near the casting layer 43. As a result, the slide rail of the bottom mold 1 presses against the side wall of the casting layer 43, placing the rubber pad in the groove. This continues to push the vertical mold 2 along the height direction towards the dormitory building via the sliding rack 53 near the bottom mold 1. This causes the side of the stabilizer 51 near the casting layer 43 of the vertical mold 2 to abut against the side wall of the bottom mold 1's slide rail near the casting layer 43, thus completing the installation of the vertical mold 2.

[0047] When installing the top formwork 3 of the cast-in-place formwork for the annular thin-walled frame balcony, align the end of the slide rail of the top formwork 3 with the larger vertical section along its length, and the slide bar 5 of the vertical formwork 2 away from the bottom formwork 1 along its height. Then, insert the slide bar 5 on the vertical formwork 2 into the slide rail on the top formwork 3, connecting the top formwork 3 to the vertical formwork 2. Using reinforcing bars, connect one end of the reinforcing bar to the connecting plate 6 on the top formwork 3, and connect the end of the reinforcing bar away from the top formwork 3 to the fixing bolt inside the dormitory building, stabilizing the top formwork 3 on the outer wall of the dormitory building. Then, push the sliding rack 53 of the vertical formwork 2 away from the bottom formwork 1 along its height towards the dormitory building, causing the sliding gear 54 to move. The gear 54 inside the slide bar 5 rotates, causing the gear 54 to move the stabilizing member 51 toward the vertical mold 2 casting layer 43. This causes the rubber pad on the stabilizing member 51 to abut against the side wall of the top mold 3 casting layer 43 near the slide rail of the top mold 3. As a result, the slide rail of the top mold 3 presses against the side wall of the top mold 3 casting layer 43, placing the rubber pad in the groove. This continues to push the sliding rack 53 of the vertical mold 2 away from the bottom mold 1 along the height direction toward the dormitory building. This causes the side of the stabilizing member 51 near the casting layer 43 of the vertical mold 2 to abut against the side wall of the top mold 3 casting layer 43 near the slide rail of the top mold 3, thus completing the installation of the top mold 3. The above-mentioned design facilitates the rapid installation of vertical mold 2 and top mold 3, saves installation time, and reduces the risk of concrete solidification in the bottom mold 1 or vertical mold 2 due to prolonged installation time. This can lead to cold joints at the connection between the concrete in the bottom mold 1 and the concrete in the vertical mold 2 or the concrete in the top mold 3, potentially causing instability in the annular thin-walled frame balcony structure. Overall, this design improves the quality of the annular thin-walled frame balcony.

[0048] By using the sliding bar 5, the slide rail, the stabilizer 51, and the drive component 52, it is easier and more convenient to use the drive component 52 to drive the stabilizer 51 to stabilize the side wall of the bottom mold 1 and the top mold 3 near the slide rail pouring layer 43. This helps to save time in installing the vertical mold 2 and the top mold 3, thus enabling rapid installation of the annular thin-walled frame balcony cast-in-place formwork. It also makes it less likely for the guide rail 7 of the annular thin-walled frame balcony cast-in-place formwork to deform near the pouring layer 43, making the annular thin-walled frame balcony cast-in-place formwork more stable and improving the quality of the annular thin-walled frame balcony.

[0049] Example 2

[0050] A construction method for cast-in-place formwork of annular thin-walled frame balcony includes the following steps:

[0051] Step 1: First, pre-embed fixing screws in the dormitory building, then build scaffolding around the dormitory building, tie steel bars on the outer wall of the dormitory building, and then use the connecting plate 6 on the bottom formwork 1 to fix the bottom formwork 1 to the outer wall of the dormitory building with steel bars, so that one end of the steel bar is fixedly connected to the connecting plate 6 of the bottom formwork 1, and the end of the steel bar away from the bottom formwork 1 is fixedly connected to the fixing screws in the dormitory building, so that the tied steel bars are placed in the bottom formwork 1, and the bottom formwork 1 is installed on the outer wall of the dormitory building. Then, pour concrete into the bottom formwork 1, and then use a vibrator to vibrate the concrete, so that the gas in the concrete in the bottom formwork 1 is discharged from the vent hole 44 on the bottom formwork 1. After the vibration is completed, seal the vent hole 44.

[0052] Step 2: Before the concrete in the bottom mold 1 has solidified, align the side wall of the smaller vertical section end of the slide bar 5 on the vertical mold 2 with the slide rail on the bottom mold 1. Then insert the slide bar 5 of the vertical mold 2 into the slide rail on the bottom mold 1, connecting the bottom mold 1 and the vertical mold 2. Then, using the connecting plate 6 on the vertical mold 2, fix the vertical mold 2 to the outer wall of the dormitory building with steel bars, so that one end of the steel bar is fixedly connected to the connecting plate 6 of the vertical mold 2, and the end of the steel bar away from the vertical mold 2 is fixedly connected to the fixing screw in the dormitory building, placing the tied steel bars inside the vertical mold 2, and installing the vertical mold 2 on the outer wall of the dormitory building. Then, push the sliding rack 53 of the vertical mold 2 along the height direction near the bottom mold 1 towards the dormitory building. This causes the sliding gear 54 to rotate, which in turn causes the gear 54 inside the slide bar 5 to move the stabilizer 51 toward the direction of the vertical mold 2 pouring layer 43. This causes the rubber pad on the stabilizer 51 to abut against the side wall of the bottom mold 1 pouring layer 43, which in turn causes the bottom mold 1 slide rail to press against the side wall of the bottom mold 1 pouring layer 43, placing the rubber pad in the groove. This causes the side of the stabilizer 51 near the vertical mold 2 pouring layer 43 to abut against the side wall of the bottom mold 1 slide rail near the bottom mold 1 pouring layer 43. Then, concrete is poured into the vertical mold 2, mixing the concrete in the bottom mold 1 with the concrete in the vertical mold 2. Finally, a vibrator is used to vibrate the concrete to expel the gas in the concrete in the vertical mold 2.

[0053] Step 3: Before the concrete in the vertical mold 2 has solidified, align the end of the slide rail of the top mold 3 (with the larger vertical section along its length) with the slide bar 5 of the vertical mold 2 (away from the bottom mold 1 along its height). Then, insert the slide bar 5 on the vertical mold 2 into the slide rail on the top mold 3, connecting the top mold 3 to the vertical mold 2. Next, using the connecting plate 6 on the top mold 3, fix the top mold 3 to the outer wall of the dormitory building with reinforcing bars. One end of the reinforcing bar is fixedly connected to the connecting plate 6 of the top mold 3, and the end of the reinforcing bar away from the top mold 3 is fixedly connected to the fixing screw inside the dormitory building. This places the bound reinforcing bars inside the top mold 3, allowing the top mold 3 to be installed on the outer wall of the dormitory building. Then, push the sliding rack 53 of the vertical mold 2 (away from the bottom mold 1 along its height) towards the dormitory building, causing the sliding gear 54 to drive the slide bar. The gear 54 inside 5 rotates, causing the stabilizer 51 to move towards the vertical mold 2 pouring layer 43. This causes the rubber pad on the stabilizer 51 to abut against the side wall of the top mold 3 pouring layer 43, which is close to the slide rail of the top mold 3. This causes the slide rail of the top mold 3 to press against the side wall of the top mold 3 pouring layer 43, placing the rubber pad in the groove. This causes the side of the stabilizer 51 close to the vertical mold 2 pouring layer 43 to abut against the side wall of the top mold 3 slide rail close to the top mold 3 pouring layer 43. Then, concrete is injected into the grouting pipe 31 on the top mold 3, mixing the concrete in the vertical mold 2 with the concrete in the top mold 3. The concrete is then vibrated with a vibrator, causing the air in the concrete in the top mold 3 to be discharged from the vent hole 44 on the top mold 3. After vibration, the vent hole 44 is sealed.

[0054] Step 4: Cure the concrete inside the cast-in-place formwork of the annular thin-walled frame balcony by circulating water for 7 days, then remove the formwork to complete the construction of the annular thin-walled frame balcony.

[0055] By quickly installing the vertical mold 2 and the top mold 3, the concrete inside the cast-in-place formwork of the annular thin-walled frame balcony can be well mixed, which helps to reduce the occurrence of cold joints that could lead to instability in the annular thin-walled frame balcony and improves the quality of the annular thin-walled frame balcony.

[0056] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A cast-in-place formwork for a ring-shaped thin-walled frame balcony, comprising a bottom formwork (1), a vertical formwork (2), and a top formwork (3) installed on the outer wall of a dormitory building, characterized in that: The bottom mold (1), vertical mold (2) and top mold (3) are provided with openings on the side walls near the dormitory building. The inner side wall of the bottom mold (1) and the outer side wall of the top mold (3) are provided with several vent holes (44). The side wall of the top mold (3) is connected to the grout inlet pipe (31). The bottom mold (1), vertical mold (2) and top mold (3) are respectively provided with an outer layer (41), an inner layer (42) and a casting layer (43). The vertical mold (2) has sliding strips (5) protruding at both ends along the height direction. The side walls of the bottom mold (1) and top mold (3) are recessed with guide rails (7) for sliding the sliding strips (5). The inner side walls of the bottom mold (1), vertical mold (2) and top mold (3) are all provided with connecting plates (6) for fixing the position of the template. The slider (5) gradually tapers along its length, and the direction in which the slider (5) at one end of the vertical mold (2) gradually tapers along its height is opposite to the direction in which the slider (5) at the other end gradually tapers. The slide bar (5) is provided with a stabilizing element (51) to enhance the stability of the side wall of the track near the vertical mold (2) casting layer (43); The stabilizer (51) is a push rod that is slidably connected to the side wall of the slide bar (5) near the vertical mold (2) casting layer (43). The push rod is provided in a plurality of them, and the plurality of push rods are evenly distributed on the slide bar (5). The slide bar (5) is provided with a drive member (52) for driving the stabilizer (51) to move away from or near the vertical mold (2) casting layer (43); The driving component (52) includes a sliding rack (53) slidably connected to the slide bar (5). The side wall of the slide bar (5) has a sliding hole for the sliding rack (53) to slide. The side wall of the push rod has a push tooth (8) protruding. The driving component (52) also includes a gear (54) meshing with the push tooth (8). The gear (54) meshes with the sliding rack (53). When the sliding rack (53) is pushed to move towards the dormitory building, the sliding rack (53) drives the gear (54) to drive the stabilizer (51) to move towards the vertical mold (2) casting layer (43).

2. The cast-in-place formwork for a ring-shaped thin-walled frame balcony according to claim 1, characterized in that: The push rod is provided with a protective element (55) to reduce wear on the push rod.

3. The cast-in-place formwork for a ring-shaped thin-walled frame balcony according to claim 2, characterized in that: The push rod has a groove recessed on the side wall near the vertical mold (2) casting layer (43). The protective component (55) is a rubber pad located in the groove, and the rubber pad protrudes from the side wall near the vertical mold (2) casting layer (43).

4. A construction method for a cast-in-place formwork for a ring-shaped thin-walled frame balcony as described in any one of claims 1-3, characterized in that: Includes the following steps: Step 1: Install the bottom formwork (1) on the outer wall of the dormitory building and pour concrete into the bottom formwork (1); Step 2: Before the concrete in the bottom mold (1) has solidified, quickly install the vertical mold (2), and then pour concrete into the vertical mold (2) so that the concrete in the bottom mold (1) and the concrete in the vertical mold (2) are mixed. Step 3: Before the concrete in the vertical mold (2) has solidified, quickly install the top mold (3) and then pour concrete into the top mold (3) so that the concrete in the vertical mold (2) and the concrete in the top mold (3) are mixed. Step 4: Allow the concrete inside the cast-in-place formwork of the annular thin-walled frame balcony to cure for more than 7 days, and then remove the formwork.

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