Assembled composite floor slab cast-in-place belt shaping suspended formwork device and construction method

Abstract

The invention provides an assembly type composite floor slab cast-in-place belt shaping formwork hanging device and a construction method. The formwork hanging device comprises a bottom formwork. The hanging bracket is located above the bottom formwork and is connected with the bottom formwork and a prefabricated floor slab through a first screw rod and a second screw rod respectively; the first sleeve is arranged outside the first screw in a sleeving mode, and the two ends of the first sleeve abut against the bottom formwork and the hanging bracket correspondingly; and the second sleeve is arranged outside the second screw in a sleeving mode, and the two ends of the second sleeve abut against the prefabricated floor slab and the hanging bracket correspondingly. According to the formwork lifting device, the situation that a vertical rod is supported below a prefabricated floor slab to support a formwork can be avoided, time and labor are saved, assembly and disassembly are convenient, and stability is high; in addition, the first sleeve and the second sleeve can be cut out on site according to different construction requirements, other structures can be prefabricated in a finalization mode and used in a turnover mode, and the construction cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a standardized hanging formwork device for cast-in-place strips of assembled composite floor slabs and a construction method. Background Art

[0002] Prefabricated buildings are one of the important directions for the development of building structures in my country. Compared with fully cast-in-place structures, prefabricated buildings use about 30% less concrete poured on site, which is energy-saving and environmentally friendly. The composite slab is composed of prefabricated floor slabs and cast-in-place layers. There is a 30cm wide cast-in-place concrete slab strip at the joints of adjacent prefabricated floor slabs, connecting the two prefabricated floor slabs into a whole. The biggest quality control point and potential risk point of prefabricated buildings is at this cast-in-place concrete slab strip.

[0003] At present, at the joints of concrete slabs, it is usually necessary to support the formwork from the bottom with supporting poles, which is time-consuming and labor-intensive. How to install the slab formwork efficiently and with high quality is an urgent problem to be solved. Summary of the invention

[0004] The object of the present invention is to provide a standardized hanging formwork device and a construction method for cast-in-place strips of assembled composite floor slabs, so as to solve the problems in the above background.

[0005] The technical solution adopted by the present invention is: a device for hanging molds for cast-in-place strips of assembled composite floor slabs, comprising:

[0006] Bottom template;

[0007] A hanger, the hanger is located above the bottom template and is connected to the bottom template and the prefabricated floor slab via a first screw and a second screw respectively;

[0008] A first sleeve, wherein the first sleeve is sleeved outside the first screw rod, and two ends of the first sleeve respectively abut against the bottom template and the hanger;

[0009] A second sleeve, wherein the second sleeve is sleeved outside the second screw rod, and two ends of the second sleeve respectively abut against the prefabricated floor slab and the hanger.

[0010] Furthermore, two groups of the first sleeves are correspondingly provided, and a group of the second sleeves is respectively provided on the separated sides of the two groups of the first sleeves, and the second sleeves are shorter than the first sleeves.

[0011] Furthermore, each group of the first sleeves has a plurality of sleeves evenly distributed along the length direction of the bottom template, and each group of the second sleeves has a plurality of sleeves evenly distributed along the length direction of the bottom template.

[0012] Furthermore, a sealing gasket is provided on the top surface of the bottom template, and the sealing gasket extends along the length direction of the bottom template, and one group of the sealing gaskets is provided below each of the two groups of the second sleeves.

[0013] Furthermore, the hanger includes a first hanger beam and a second hanger beam which are staggered and connected to each other. The first hanger beam and the second hanger beam extend along the length direction and the width direction of the bottom template respectively. The first screw rod and the second screw rod are arranged on the second hanger beam through.

[0014] Furthermore, a first nut and a second nut are provided at the bottom of the second suspension beam, and the first nut and the second nut are respectively sleeved on the first screw rod and the second screw rod.

[0015] Furthermore, a third nut is provided at the bottom of the bottom template, and the third nut is sleeved on the first screw rod.

[0016] Furthermore, a tapered pin and a pin groove are respectively provided at both ends of the first suspension beam, and the pin groove is adapted to the shape of the tapered pin; and the outer diameter of the tapered pin gradually decreases in the direction away from the first suspension beam.

[0017] The technical solution of the present invention also includes: a method for construction using the above-mentioned assembled composite floor slab cast-in-place belt fixed formwork hanging device, which includes the steps of:

[0018] Place the hanger above the prefabricated floor, press the two ends of the second sleeve against the prefabricated floor and the hanger respectively, insert the second screw into the second sleeve, and lock it with the hanger;

[0019] Place the bottom template under the prefabricated floor slab; place the first sleeve in the joint of adjacent prefabricated floor slabs, with the two ends respectively pressed against the bottom template and the hanger; insert the first screw into the first sleeve, with the two ends respectively locked with the hanger and the bottom template;

[0020] Pour the cast-in-place layer and cast-in-place strip.

[0021] The beneficial effects of the present invention are as follows: the formwork hanging device provided by the present invention can avoid supporting the formwork with top vertical poles under the prefabricated floor slab, saving time and labor, and is easy to install and disassemble and has high stability; the first sleeve and the second sleeve can also be cut on-site according to different construction requirements, and other structures can be prefabricated in a standardized manner and used in rotation, which greatly reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural diagram of an embodiment of the present invention;

[0023] Figure 2 is a front view of an embodiment of the present invention;

[0024] Figure 3 It is a three-dimensional structural diagram of the hanger in an embodiment of the present invention.

[0025] In the figure:

[0026] 1. Bottom template;

[0027] 2. Hanger; 21. First hanging beam; 22. Second hanging beam; 23. Tapered pin; 24. Pin groove;

[0028] 3. The first screw;

[0029] 4. Second screw;

[0030] 5. First sleeve;

[0031] 6. Second sleeve;

[0032] 7. First nut;

[0033] 8. Second nut;

[0034] 9. The third nut;

[0035] 10. Prefabricated floor slabs;

[0036] 11. Sealing gasket;

[0037] 12. Cast-in-place layer;

[0038] 13. Ring gasket. DETAILED DESCRIPTION

[0039] The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0041] Reference Figure 1-3A device for hanging molds for cast-in-place strips of assembled composite slabs comprises: a bottom mold plate 1, a hanger 2, a first screw rod 3, a second screw rod 4, a first sleeve 5, a second sleeve 6, a first nut 7, a second nut 8 and a third nut 9. The hanger 2 and the bottom template 1 are arranged opposite to each other, and the hanger 2 is located above the bottom template 1, and the bottom template 1 and the prefabricated floor slab 10 are connected by the first screw 3 and the second screw 4 respectively; the outer walls of the first screw 3 and the second screw 4 are provided with threads, the first nut 7 and the second nut 8 are located at the top of the hanger 2, and are respectively sleeved on the first screw 3 and the second screw 4, and the first screw 3 and the second screw 4 are respectively fixed to the hanger 2, and the third nut 9 is located at the bottom of the bottom template 1, and is sleeved on the first screw 3 to fix the first screw 3 to the bottom template 1; the first sleeve 5 is sleeved on the outside of the first screw 3, and the two ends are respectively abutted against the bottom template 1 and the hanger 2, and the second sleeve 6 is sleeved on the outside of the second screw 4, and the two ends are respectively abutted against the prefabricated floor slab 10 and the hanger 2.

[0042] The above device is constructed at the joint of adjacent precast slabs 10, and the hanger 2 is stably supported on the precast slab 10 by using the second screw 4, the second sleeve 6 and the second nut 8. The gap between the two precast slabs 10 is blocked from the bottom by the bottom template 1, and then the hanger 2 and the bottom template 1 are stably connected by using the first screw 3, the first sleeve 5, the first nut 7 and the third nut 9, so as to complete the support of the cast-in-place strip template at the joint of adjacent precast slabs 10. The above device and construction method are used to improve the support efficiency of the template and the overall efficiency of the construction. In addition, the above device takes the precast slab 10 as the main force-bearing structure, and has good stability and good casting quality.

[0043] After the cast-in-place strips and the cast-in-place layer 12 of the floor slab are cast, the device is dismantled, and all structures except the first sleeve 5 and the second sleeve 6 can be easily disassembled, and the first sleeve 5 and the second sleeve 6 can be pre-constructed of plastic material. After other structures are dismantled, the first sleeve 5 and the second sleeve 6 can be removed with a removal tool, and the cleaning difficulty is also relatively small. After removal, the holes are sealed with mortar, and the parts with waterproofing requirements can be sealed with waterproof materials such as polyurethane.

[0044] In actual use, annular gaskets 13 (or annular gaskets) can be added between the first nut 7 and the hanger 2, between the second nut 8 and the hanger 2, and between the third nut 9 and the bottom template 1 as needed to increase the connection stability.

[0045] In this embodiment, the hanger 2 includes a first hanging beam 21 and a second hanging beam 22 which are staggered and connected, and a first screw rod 3 and a second screw rod 4 are respectively arranged through the second hanging beam 22. The distribution of the first hanging beam 21 and the second hanging beam 22 can be configured according to actual use requirements. For example, two groups of the first hanging beam 21 and the second hanging beam 22 can be provided as in this embodiment. The first hanging beam 21 and the second hanging beam 22 extend along the length direction and the width direction of the bottom template 1 respectively, and are connected in a tic-tac-toe shape to improve the stability of the support.

[0046] In addition, a tapered pin 23 and a pin slot 24 may be provided at both ends of the first suspension beam 21, respectively, and the pin slot 24 is adapted to the shape of the tapered pin 23; the outer diameter of the tapered pin 23 gradually decreases in the direction away from the first suspension beam 21. When the length of the hanger 2 is insufficient, the number of hangers 2 may be increased, and the tapered pins 23 on one group of hangers 2 may be inserted into the pin slots 24 in another group of hangers 2 to extend the total length of the hangers 2.

[0047] The first suspension beam 21 and the second suspension beam 22 can be made of commonly used square steel. The square steel itself is hollow inside, so the work of digging the pin groove 24 can be avoided. It is only necessary to weld the tapered pin 23 at the other end of the square steel, which reduces the difficulty of production.

[0048] In this embodiment, two groups of first sleeves 5 are correspondingly arranged along the width direction of the bottom template 1, and a group of second sleeves 6 is respectively provided on the separated sides of the two groups of first sleeves 5; along the length direction of the bottom template 1, each group of first sleeves 5 is evenly distributed with a number of, each group of second sleeves 6 is evenly distributed with a number of, each group of first sleeves 5 and second sleeves 6 are respectively penetrated by a first screw 3 and a second screw 4, and the support stability of the device can be changed by adjusting the quantity.

[0049] Among them, the second sleeve 6 is shorter than the first sleeve 5. This is because the bottom end of the second sleeve 6 is used to abut the prefabricated floor 10, and the bottom end of the second sleeve 6 is used to abut the bottom template 1. In the installed hanging formwork device, the top surface of the bottom template 1 should be flush with the bottom surface of the prefabricated floor 10.

[0050] In addition, in order to improve the pouring quality and prevent overflow, a sealing gasket 11 is also provided on the top surface of the bottom template 1 in this embodiment. The sealing gasket 11 extends along the length direction of the bottom template 1 and is provided in one group under each of the two groups of second sleeves 6 to seal the gap between the top surface of the bottom template 1 and the bottom surface of the prefabricated floor 10.

[0051] When the device is used for construction, not only can the first screw 3 and the second screw 4 be used to fix the hanger 2 and the bottom template 1, but the second screw 4 and the second sleeve 6 can also be used to coordinately adjust the distance between the hanger 2 and the precast floor 10, and the first screw 3 and the first sleeve 5 can be used to coordinately adjust the distance between the hanger 2 and the bottom template 1 to meet different construction needs. Since the first sleeve and the second sleeve need to be removed after pouring and are consumables, they can be cut on site according to the different thicknesses of the precast floor 10 and the cast-in-place layer 12. After the first screw 3 and the second screw 4 are inserted, the first nut 7, the second nut 8 and the third nut 9 can be tightened at different positions respectively.

[0052] Compared with the prior art, the beneficial effects of the present invention are: the hanging formwork device provided by the present invention can avoid the need to support the formwork with top vertical poles under the prefabricated floor 10, saving time and effort, and is easy to install and disassemble and has high stability; the first sleeve and the second sleeve can also be cut on-site according to different construction requirements, and other structures can be prefabricated in a standardized manner and used in rotation, which greatly reduces construction costs.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0054] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for hanging molds for cast-in-place strips of assembled composite floor slabs, characterized in that: include: Bottom template; A hanger, the hanger is located above the bottom template and is connected to the bottom template and the prefabricated floor slab via a first screw and a second screw respectively; A first sleeve, wherein the first sleeve is sleeved outside the first screw rod, and two ends of the first sleeve respectively abut against the bottom template and the hanger; A second sleeve, wherein the second sleeve is sleeved outside the second screw rod, and two ends of the second sleeve respectively abut against the prefabricated floor slab and the hanger.

2. The device for hanging molds for cast-in-place strips of assembled composite floor slabs according to claim 1 is characterized in that: Two groups of the first sleeves are correspondingly provided, and a group of the second sleeves is respectively provided on the separated sides of the two groups of the first sleeves, and the second sleeves are shorter than the first sleeves.

3. The device for hanging molds for cast-in-place strips of assembled composite floor slabs according to claim 2 is characterized in that: Each group of the first sleeves has a plurality of sleeves evenly distributed along the length direction of the bottom template, and each group of the second sleeves has a plurality of sleeves evenly distributed along the length direction of the bottom template.

4. The device for hanging molds for cast-in-place strips of assembled composite floor slabs according to any one of claims 1 to 3, characterized in that: A sealing gasket is disposed on the top surface of the bottom template. The sealing gasket extends along the length direction of the bottom template and is disposed one group below each of the two groups of the second sleeves.

5. The device for hanging molds for cast-in-place strips of assembled composite floor slabs according to claim 4 is characterized in that: The hanger includes a first hanger beam and a second hanger beam which are connected in an alternating manner. The first hanger beam and the second hanger beam extend along the length direction and the width direction of the bottom template respectively. The first screw rod and the second screw rod are arranged through the second hanger beam.

6. The device for hanging molds for cast-in-place strips of assembled composite floor slabs according to claim 5 is characterized in that: A first nut and a second nut are provided at the bottom of the second suspension beam, and the first nut and the second nut are respectively sleeved on the first screw rod and the second screw rod.

7. The device for hanging molds for cast-in-place strips of assembled composite floor slabs according to claim 6 is characterized in that: A third nut is provided at the bottom of the bottom template, and the third nut is sleeved on the first screw rod.

8. The device for hanging molds for forming cast-in-place strips of assembled composite floor slabs according to any one of claims 5 to 7, characterized in that: A tapered pin and a pin groove are respectively provided at both ends of the first suspension beam, and the pin groove is adapted to the shape of the tapered pin; the outer diameter of the tapered pin gradually decreases in the direction away from the first suspension beam.

9. A construction method using the prefabricated composite floor slab cast-in-place fixed formwork hanging device according to claim 8, characterized in that: Includes steps: Place the hanger above the prefabricated floor, press the two ends of the second sleeve against the prefabricated floor and the hanger respectively, insert the second screw into the second sleeve, and lock it with the hanger; Place the bottom template under the prefabricated floor slab; place the first sleeve in the joint of adjacent prefabricated floor slabs, with the two ends respectively pressed against the bottom template and the hanger; insert the first screw into the first sleeve, with the two ends respectively locked with the hanger and the bottom template; Pour the cast-in-place layer and cast-in-place strip.

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