Cantilever formwork erecting device under finalization space constraint condition

Abstract

The utility model provides an overhanging formwork erecting device under a shaping space constraint condition, which belongs to the field of formwork erecting and comprises a plurality of overhanging devices and a support frame, the overhanging devices are arranged on a floor slab side by side at intervals, the front ends of the overhanging devices extend out of the outer side of the floor slab, and the support frame is arranged at the ends, extending out of the floor slab, of the overhanging devices. The overhanging device comprises an I-shaped steel beam, a steel sleeve, an upper fastening device, a vertical rod positioning device, an inclined strut, a lower fastening device, a steel column and a rear end tension device. The height of the device is shaped, and the device can be mounted and dismounted in a lossless manner and can be repeatedly used. And wide applicability and high turnover performance are achieved, and installation is rapid and convenient.

Description

Technical Field

[0001] The utility model relates to the field of template erection, in particular to a cantilever template erection device under standardized space constraint conditions. Background Art

[0002] During the construction process, it is often encountered that the cantilever length of the eaves board is relatively large. If the support system is too high, it will be difficult to support and reinforce the large eaves formwork.

[0003] Chinese patent publication number CN102322140A discloses a method for constructing large-span cantilever formwork supports. One end of the support is laid on the lower level of the cantilever, and the other end is tied to the beams of the lower level via steel cables. The supports are arranged linearly around the building at regular intervals. A scaffold is erected on the cantilevered supports, and the cantilever formwork is supported at the top of the scaffold. This cantilever formwork is subjected to stress outside the exterior wall, making construction difficult and poorly stressed. Therefore, a device for erecting cantilever formwork within standardized spatial constraints is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a cantilever formwork erection device under standardized space constraint conditions, so as to solve the technical problems of difficult construction and poor stress bearing of the existing cantilever formwork erection frame.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] A cantilever formwork erection device under standardized space constraints comprises a plurality of cantilever devices and a support frame, wherein the plurality of cantilever devices are arranged side by side and spaced apart on a floor slab, and the front ends of the cantilever devices extend outward from the floor slab, and the support frame is arranged on the ends of the cantilever devices extending outward from the floor slab;

[0007] The cantilever device includes an I-beam, a steel sleeve, an upper fastening device, a vertical pole positioning device, a diagonal brace, a lower fastening device, a steel column and a rear end tensioning device. The steel column is vertically arranged on the edge of the floor slab, the steel sleeve is arranged at the top end of the steel column, the I-beam passes through the steel sleeve and extends out of the outside of the floor slab, the rear end tensioning device is arranged at the rear end bottom of the I-beam and fixed on the floor slab, the upper fastening device and the vertical pole positioning device are fixedly arranged on the end of the I-beam extending out of the floor slab, the lower fastening device is arranged on the steel column, and the diagonal brace is obliquely arranged between the upper fastening device and the lower fastening device.

[0008] Furthermore, a first lifting ring, a second lifting ring and a circular hole are provided on the I-beam. The first lifting ring and the second lifting ring are provided at the bottom of the rear end of the I-beam, and the circular hole is provided at the end of the I-beam extending out of the floor slab.

[0009] Furthermore, the upper fastening device includes a frame, an upper fastening device slot is provided at the bottom of the frame, upper fastening device position holes are provided on both sides of the frame, upper fastening device bolts are provided through the upper fastening device position holes, and are tightened using upper fastening device nuts, and upper fastening device gaskets are provided on the inner side of the upper fastening device nut.

[0010] Furthermore, the vertical pole positioning device includes a left plate, a right plate, a vertical pole positioning rib and a fixing device. The left plate and the right plate constitute a frame structure. The left plate and the right plate are fixed by the fixing device. The vertical pole positioning rib is set on the top of the frame structure.

[0011] Furthermore, the lower fastening device includes a frame, and the three sides of the frame are respectively provided with a first slot of the lower fastening device, a second slot of the lower fastening device and a third slot of the lower fastening device, and the other side of the frame is provided with a screw hole of the lower fastening device, and the bolts of the lower fastening device are set to pass through the screw holes of the lower fastening device for fixing.

[0012] Furthermore, the rear-end tension device includes two tension rope devices, one end of the two tension rope devices are respectively arranged on the first lifting ring and the second lifting ring, and the other ends of the two tension rope devices are fixed on the floor slab. The tension rope device includes an upper end steel wire rope, a basket bolt, a lower end steel wire rope, a pull ring and a pad. One end of the upper end steel wire rope is connected to the first lifting ring or the second lifting ring, the other end of the upper end steel wire rope is connected to the upper end of the basket bolt, one end of the lower end steel wire rope is connected to the lower end of the basket bolt, the other end of the lower end steel wire rope is connected to the pull ring, the pull ring is connected to the pad, and the pad is fixed to the floor slab.

[0013] Furthermore, the steel columns between two adjacent cantilever device steel columns are connected by a long crossbeam or a short crossbeam buckle, and the long crossbeam or the short crossbeam is buckled between the two lower fastening devices.

[0014] Furthermore, a base is provided at the bottom of the steel column, the steel column is fixedly connected to the base, and the base is fixed to the floor slab by expansion bolts.

[0015] Furthermore, the pad is fixedly arranged by passing through the floor slab through a U-bolt.

[0016] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0017] (1) The utility model is highly standardized, and the device can be installed and disassembled without loss and can be reused. It has wide applicability and high turnover performance, and is quick and easy to install.

[0018] (2) The installation structure of the present invention is all carried out on the floor, which is easy to install. At the same time, the supporting force is transmitted to the tension on the floor through the support beam, achieving better vertical force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the cantilever device of the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the steel beam of the utility model;

[0021] Figure 3 This is a three-dimensional diagram of the formwork frame erected on the cantilever device combination of the utility model;

[0022] Figure 4 This is an exploded schematic diagram of the utility model's pole positioning device;

[0023] Figure 5 This is an exploded schematic diagram of the upper fastening device of the utility model;

[0024] Figure 6 This is an exploded schematic diagram of the lower fastening device of the utility model;

[0025] Figure 7 It is a schematic diagram of the connection between the diagonal brace and the upper and lower fastening devices of the utility model.

[0026] In the attached figure, 1-I-beam, 1.1-first lifting ring, 1.2-second lifting ring, 1.3-round hole, 2-steel sleeve, 3-upper fastening device, 3.1-upper fastening device bolt, 3.2-upper fastening device gasket, 3.3-upper fastening device position hole, 3.4-upper fastening device nut, 3.5-upper fastening device slot, 4-pole positioning device, 4.1-left web, 4.2-right web, 4.3-pole positioning rib, 4.4-pole positioning device nut, 4.5-pole positioning device first gasket, 4.6-pole positioning device Hole position, 4.7-second gasket of the vertical pole positioning device, 4.8-bolt of the vertical pole positioning device, 5-diagonal brace, 6-lower fastening device, 6.1-first slot of the lower fastening device, 6.2-second slot of the lower fastening device, 6.3-third slot of the lower fastening device, 6.4-screw hole of the lower fastening device, 6.5-gasket of the lower fastening device, 6.6-bolt of the lower fastening device, 7-steel column, 8-upper end steel wire rope, 9-basket bolt, 10-lower end steel wire rope, 11-pull ring, 12-pad, 13-base, 14-long beam, 15-short beam. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many of the details listed in this specification are merely provided to help readers gain a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0028] like Figure 1-7As shown, a cantilever formwork erection device under standardized space constraint conditions includes a plurality of cantilever devices and a support frame. The plurality of cantilever devices are arranged side by side and spaced apart on the floor slab, and the front end of the cantilever device extends outward from the floor slab, and the support frame is arranged on the end of the cantilever device extending outward from the floor slab.

[0029] like Figure 1 As shown, the cantilever device includes an I-beam 1, a steel sleeve 2, an upper fastening device 3, a vertical pole positioning device 4, a diagonal brace 5, a lower fastening device 6, a steel column 7, and a rear-end tensioning device. The steel column 7 is vertically arranged on the edge of the floor slab, the steel sleeve 2 is arranged at the top of the steel column 7, the I-beam 1 passes through the steel sleeve 2 and extends outside the floor slab. The rear-end tensioning device is arranged at the rear end bottom of the I-beam 1 and fixed to the floor slab. The upper fastening device 3 and the vertical pole positioning device 4 are fixedly arranged at the end of the I-beam 1 extending from the floor slab. The lower fastening device 6 is arranged on the steel column 7, and the diagonal brace 5 is arranged obliquely between the upper fastening device 3 and the lower fastening device 6. A base 13 is provided at the bottom of the steel column 7, and the steel column 7 is fixedly connected to the base 13. The base 13 is fixed to the floor slab via expansion bolts.

[0030] In the embodiment of the present utility model, Figure 2 As shown, the I-beam 1 is provided with a first lifting ring 1.1, a second lifting ring 1.2 and a circular hole 1.3. The first lifting ring 1.1 and the second lifting ring 1.2 are arranged at the bottom of the rear end of the I-beam 1, and the circular hole 1.3 is arranged at the end of the I-beam 1 extending out of the floor slab.

[0031] In the embodiment of the present invention, the upper fastening device 3 includes a frame, an upper fastening device slot 3.5 is provided at the bottom of the frame, and upper fastening device holes 3.3 are provided on both sides of the frame. An upper fastening device bolt 3.1 is provided through the upper fastening device hole 3.3 and is tightened using an upper fastening device nut 3.4. An upper fastening device gasket 3.2 is provided on the inner side of the upper fastening device nut 3.4.

[0032] In an embodiment of the present invention, the vertical pole positioning device 4 includes a left plate 4.1, a right plate 4.2, a vertical pole positioning rib 4.3 and a fixing device. The left plate 4.1 and the right plate 4.2 constitute a frame structure. The left plate 4.1 and the right plate 4.2 are fixed by the fixing device, and the vertical pole positioning rib 4.3 is set at the top of the frame structure.

[0033] In the embodiment of the present invention, the lower fastening device 6 includes a frame, and the three sides of the frame are respectively provided with a first slot 6.1 of the lower fastening device, a second slot 6.2 of the lower fastening device, and a third slot 6.3 of the lower fastening device. The other side of the frame is provided with a screw hole 6.4 of the lower fastening device, and a bolt (6.6) of the lower fastening device is provided to pass through the screw hole 6.4 of the lower fastening device for fixing.

[0034] In the embodiment of the present invention, the rear end tension device includes two tension rope devices, one end of the two tension rope devices is respectively set on the first lifting ring 1.1 and the second lifting ring 1.2, and the other end of the two tension rope devices is fixed to the floor slab. The tension rope device includes an upper end wire rope 8, a basket bolt 9, a lower end wire rope 10, a pull ring 11 and a pad 12. One end of the upper end wire rope 8 is connected to the first lifting ring 1.1 or the second lifting ring 1.2, the other end of the upper end wire rope 8 is connected to the upper end of the basket bolt 9, one end of the lower end wire rope 10 is connected to the lower end of the basket bolt 9, the other end of the lower end wire rope 10 is connected to the pull ring 11, the pull ring 11 is connected to the pad 12, and the pad 12 is fixed to the floor slab. The pad 12 is fixed by setting a U-bolt through the floor slab.

[0035] In the embodiment of the present invention, the steel columns 7 between two adjacent cantilever device steel columns 7 are connected by a long crossbeam 14 or a short crossbeam 15, and the long crossbeam 14 or the short crossbeam 15 is buckled between the two lower fastening devices 6.

[0036] The formwork support is set on the device for cantilevered formwork erection under space constraints, and then the formwork support is erected on it to meet the needs of formwork erection under special space constraints (such as it is impossible to erect a full-floor scaffolding or a cantilevered scaffolding below the erection location, and there are existing buildings or immovable objects below the erection location that cannot withstand loads such as formwork pouring).

[0037] The spacing and load capacity of the devices are calculated. The devices are connected by beams of varying lengths. The ends of the beams are connected to the baseplate using a tie system consisting of wire ropes and turnbuckles. The baseplate is secured with expansion bolts or through-plate U-shaped anchor bolts.

[0038] The device is highly standardized and can be installed and disassembled without damage and is reusable. It has wide applicability and high turnover performance, and is quick and easy to install.

[0039] The specific construction steps of the device are as follows:

[0040] 1) Determine the beam modulus and steel beam size of the device: The installation spacing and steel beam size of the device shall be calculated according to Section 5.6.3 of the "Safety Technical Specifications for Coupler-Type Steel Pipe Scaffolding in Building Construction" (JGJ130-2011). The length of the fixed section shall not be less than 1.25 times the length of the cantilever section. Select the appropriate beam modulus and steel beam size based on the calculation results.

[0041] 2) Positioning of pull ring base plate and steel column base plate: Draw the plan layout according to the determined beam module and steel beam size, and mark the positioning on site;

[0042] 3) Base plate fixing: At the base plate positioning point, select expansion bolts or through-plate U-shaped anchor bolts for fixing according to the actual situation on site;

[0043] 4) Beam installation: Insert the interfaces of the upper and lower beams into the horizontal slots of the two lower fastening devices to ensure they are firm.

[0044] 5) Steel beam installation: After the steel beam passes through the steel column sleeve, install the fastening device, diagonal brace and two vertical pole positioning devices.

[0045] 6) Preliminary installation of wire rope and basket bolts: The wire rope passes through the steel beam lifting ring and the bottom plate pull ring respectively, and is preliminarily connected through the basket bolts. A spirit level is used to ensure that the steel beam remains level.

[0046] 7) Formwork support and formwork erection: After the cantilever formwork erection device is installed, start the formwork support and formwork erection, and use a spirit level to monitor the level of the steel beam during the process.

[0047] 8) Concrete pouring and curing: Concrete pump pipe supports and pipes should not be placed above overhanging areas, and workers should be prevented from lingering in overhanging areas. Turnbuckles should be used for real-time adjustments during the pouring and curing process.

[0048] 9) Removal of floor slab formwork, frame, and cantilever formwork: After the curing period has expired, the formwork should be removed first, followed by the frame, and finally the cantilever formwork. The cantilever formwork should be removed in the reverse order of installation. Before removing the steel beam, gradually remove the tension from the turnbuckles and maintain beam level monitoring.

[0049] The above is only a preferred embodiment 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 erecting cantilever formwork under standardized space constraints, characterized by: It includes a plurality of cantilever devices and support frames, wherein the plurality of cantilever devices are arranged side by side and at intervals on the floor slab, and the front ends of the cantilever devices extend outward from the floor slab, and the support frames are arranged on the ends of the cantilever devices extending outward from the floor slab; The cantilever device comprises an I-beam (1), a steel sleeve (2), an upper fastening device (3), a vertical pole positioning device (4), a diagonal brace (5), a lower fastening device (6), a steel column (7) and a rear end tension device, wherein the steel column (7) is vertically arranged on the edge of the floor slab, the steel sleeve (2) is arranged at the top end of the steel column (7), the I-beam (1) passes through the steel sleeve (2) and extends out of the outside of the floor slab, the rear end tension device is arranged at the rear end bottom of the I-beam (1) and fixed on the floor slab, the upper fastening device (3) and the vertical pole positioning device (4) are fixedly arranged at the end of the I-beam (1) extending out of the floor slab, the lower fastening device (6) is arranged on the steel column (7), and the diagonal brace (5) is obliquely arranged between the upper fastening device (3) and the lower fastening device (6).

2. The cantilever formwork erection device under standardized space constraints according to claim 1, characterized in that: The I-beam (1) is provided with a first lifting ring (1.1), a second lifting ring (1.2) and a circular hole (1.3); the first lifting ring (1.1) and the second lifting ring (1.2) are arranged at the bottom of the rear end of the I-beam (1); and the circular hole (1.3) is arranged at the end of the I-beam (1) extending out of the floor slab.

3. The cantilever formwork erection device under standardized space constraints according to claim 1, characterized in that: The upper fastening device (3) comprises a frame, an upper fastening device slot (3.5) is provided at the bottom of the frame, upper fastening device holes (3.3) are provided on both sides of the frame, upper fastening device bolts (3.1) are provided to pass through the upper fastening device holes (3.3) and are tightened using upper fastening device nuts (3.4), and upper fastening device gaskets (3.2) are provided inside the upper fastening device nuts (3.4).

4. The cantilever formwork erection device under standardized space constraints according to claim 1, characterized in that: The vertical pole positioning device (4) comprises a left width plate (4.1), a right width plate (4.2), a vertical pole positioning rib (4.3) and a fixing device. The left width plate (4.1) and the right width plate (4.2) form a frame structure. The left width plate (4.1) and the right width plate (4.2) are fixedly arranged by the fixing device. The vertical pole positioning rib (4.3) is arranged on the top of the frame structure.

5. The cantilever formwork erection device under standardized space constraints according to claim 1, characterized in that: The lower fastening device (6) comprises a frame, wherein three side surfaces of the frame are respectively provided with a first lower fastening device slot (6.1), a second lower fastening device slot (6.2), and a third lower fastening device slot (6.3); the other side of the frame is provided with a lower fastening device screw hole (6.4), and a lower fastening device bolt (6.6) is provided to pass through the lower fastening device screw hole (6.4) for fixing.

6. The device for erecting cantilever formwork under standardized space constraints according to claim 1, characterized in that: The rear end tension device includes two tension rope devices, one end of each of which is respectively arranged on a first lifting ring (1.1) and a second lifting ring (1.2), and the other end of each of the two tension rope devices is fixed on the floor slab. The tension rope device includes an upper end steel wire rope (8), a basket bolt (9), a lower end steel wire rope (10), a pull ring (11) and a pad (12). One end of the upper end steel wire rope (8) is connected to the first lifting ring (1.1) or the second lifting ring (1.2), the other end of the upper end steel wire rope (8) is connected to the upper end of the basket bolt (9), one end of the lower end steel wire rope (10) is connected to the lower end of the basket bolt (9), the other end of the lower end steel wire rope (10) is connected to the pull ring (11), the pull ring (11) is connected to the pad (12), and the pad (12) is fixed on the floor slab.

7. The cantilever formwork erection device under standardized space constraints according to claim 1, characterized in that: The steel columns (7) between two adjacent cantilever device steel columns (7) are connected by snapping together a long crossbeam (14) or a short crossbeam (15), and the long crossbeam (14) or the short crossbeam (15) is snapped together between the two lower fastening devices (6).

8. The device for erecting cantilever formwork under standardized space constraints according to claim 1, characterized in that: A base (13) is provided at the bottom of the steel column (7), the steel column (7) and the base (13) are fixedly connected, and the base (13) is fixed to the floor slab via expansion bolts.

9. The device for erecting cantilever formwork under standardized space constraints according to claim 6, characterized in that: The backing plate (12) is fixedly arranged by arranging U-shaped bolts passing through the floor slab.

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