An erection device and erection process for cantilever I-beams of the external scaffolding outside the slab lowering area

Abstract

The present invention provides a device and construction technology for cantilevered I-beams of the external scaffolding outside the sunken slab area, which relates to the field of construction engineering and includes: I-beam one; a scaffolding body is erected on the top surface of the I-beam one; full-welded hanging ears are respectively welded on the left and right sides of the I-beam two, and a flower basket bolt is fixedly connected to the full-welded hanging ear; when installing the flower basket bolt outside the full-welded hanging ear, an installation auxiliary part is clamped outside the full-welded hanging ear. By clamping the installation auxiliary part to the top of the I-beam two, aligning the positioning hole with the connection hole of the full-welded hanging ear, after placing the nut on the top surface of the pressing plate, pushing the pressing plate under the screw rod, driving the clamping plate to clamp outside the nut after pushing the push rod, rotating the screw rod with an electric drill to complete the preliminary fixation, then pushing the pressing plate away from the screw rod, and using the electric drill to complete the connection between the screw rod and the nut, and also complete the connection between the full-welded hanging ear and the flower basket bolt, solving the problems of difficult and quick connection between the full-welded hanging ear and the flower basket bolt and avoiding the nut from falling off.

Description

Technical Field

[0001] The present invention relates to the field of construction engineering, and particularly relates to a device and a construction process for erecting a cantilever I-beam of an external scaffold in a sunken slab area. Background Technique

[0002] During the construction of high-rise buildings in construction engineering, a steel cantilever scaffold is required. When the I-beam of the cantilever scaffold is supported, generally, the internal anchorage length should be 1.25 times the length of the cantilever part. To ensure that the I-beam meets the deflection requirements under load, generally, a channel steel underprop or a wire rope upper pull method is adopted for support to prevent the I-beam from exceeding the material limit in terms of deflection and causing problems such as instability.

[0003] However, for the current device for erecting the I-beam of the cantilever scaffold, once there is a sunken slab in the cantilever area, it is difficult for the I-beam to extend into the floor interior and the internal anchorage length cannot meet the requirements. Since the floor of the cantilever part is a mutation position compared to the lower floor, if a channel steel underprop is used, there will be a situation of staggered collision with the cantilever scaffold of the lower floor, affecting the passage of the cantilever scaffold on the lower floor. If the upper pull method is used, since the upper floor has not been poured yet, there is no way to tie. At this time, under the influence of the load on the I-beam material itself, it is difficult to project a sufficient distance relying on the material itself and it is difficult to meet the construction requirements. At this time, there is an urgent need to introduce a new construction process for the cantilever I-beam to meet the deflection requirements of the I-beam in this situation. Moreover, when connecting the full-welded hanging ear and the flower basket bolt, using the traditional manual method to screw the nut is difficult to connect quickly, and the nut is easy to fall off, affecting the construction progress, and it is difficult to quickly connect the full-welded hanging ear and the flower basket bolt. Summary of the Invention

[0004] In view of this, the present invention provides a device and a construction process for erecting a cantilever I-beam of an external scaffold in a sunken slab area, which has an installation auxiliary part, can quickly connect the full-welded hanging ear and the flower basket bolt, and can avoid the nut from falling off at the same time, improving the construction progress.

[0005] The present invention provides the purpose and effect of a device and a construction process for erecting a cantilever I-beam of an external scaffold in a sunken slab area, which specifically includes: I-beam one, embedded steel bars, and I-beam two; a scaffold body is erected on the top surface of the I-beam one; the I-beam two is embedded in the side beam, and full-welded hanging ears are respectively welded on the left and right sides of the I-beam two, and a flower basket bolt is fixedly connected to the full-welded hanging ear; the lower end of the flower basket bolt is fixedly connected to a wire rope; the wire rope is fixedly connected to the I-beam one; when installing the flower basket bolt outside the full-welded hanging ear, an installation auxiliary part is clamped outside the flower basket bolt; the embedded steel bars are embedded inside the floor; an outer frame baffle is installed on the outside of the scaffold body.

[0006] Further, the I-beam one is fixedly installed in the cantilever sunken slab area through an internal anchorage hoop.

[0007] Furthermore, one end of the turnbuckle is fixedly connected to the full-welded hanging ear by means of a U-shaped connecting piece in cooperation with a screw rod and a nut, and the other end is fixedly connected to the steel wire rope by means of a fixed and closed circular structure. The screw rod in the U-shaped connecting piece at the upper end of the turnbuckle penetrates through the installation auxiliary part.

[0008] Furthermore, the middle of the embedded steel bar is in a U-shaped structure and both ends are in a straight structure. The U-shaped part of the embedded steel bar protruding from the floor is connected to the steel wire rope.

[0009] Furthermore, the installation auxiliary part includes a fixing plate. When the installation auxiliary part is clamped to the second I-beam, the fixing plate is located at the rear end face of the full-welded hanging ear, and the semi-circular plate on the installation auxiliary part is located at the front end face of the full-welded hanging ear. The fixing plate is provided with a limiting groove and a positioning hole. The limiting groove is in an L-shaped structure, and the positioning hole corresponds to the position of the connecting hole inside the full-welded hanging ear.

[0010] Furthermore, the installation auxiliary part further includes a bracket. A chute is arranged inside the bracket, a rectangular block is arranged on the inner side of the bottom of the bracket, and the bracket is fixedly welded to the fixing plate.

[0011] Furthermore, the installation auxiliary part further includes a clamping plate. The clamping plate is in a right-angle structure, and a clamping groove is arranged on the inner side of the bottom of the clamping plate. The upper part of the clamping groove is in a regular hexagon structure and the lower part is in a circular structure. The nut of the U-shaped connecting piece at the upper end of the turnbuckle is clamped inside the clamping groove, and the screw rod of the U-shaped connecting piece penetrates through the circular hole at the lower part of the clamping groove. A push rod is further arranged on the outer end face of the clamping plate.

[0012] Furthermore, the installation auxiliary part further includes a sleeve. The end of the push rod is slidably clamped inside the sleeve, and a spring is arranged between the two groups of push rods inside the sleeve.

[0013] Furthermore, the installation auxiliary part further includes a resisting plate. A groove is arranged on the outer side face of the resisting plate, and the rectangular block on the bracket is slidably clamped inside the groove.

[0014] The present invention discloses a construction process of a construction device for cantilever I-beams of an external scaffolding in a sunken slab area, including the following steps:

[0015] 1), The installation auxiliary part is clamped to the top of the second I-beam, the positioning hole is aligned with the connecting hole of the full-welded hanging ear, the push rod is pushed to drive the clamping plate to move, the clamping plate clamps to the outside of the nut, and after the screw rod is rotated by an electric drill, the screw rod can be quickly connected to the nut to complete the connection between the turnbuckle and the full-welded hanging ear;

[0016] 2), The first I-beam is fixedly installed in the cantilever sunken slab area through an internal anchoring hoop, the embedded steel bar is embedded inside the floor, and the second I-beam is embedded in the side beam;

[0017] 3), Fix the bottom end of the turnbuckle to the top end of the steel wire rope, and fix the bottom ends of the two groups of steel wire ropes to the first I-beam and the embedded steel bars respectively.

[0018] 4), Set up a scaffolding on the top surface of the first I-beam, and set up an outer scaffolding baffle on the outside of the scaffolding. Beneficial effects

[0019] According to the external scaffolding cantilever I-beam erection device of the embodiments of the present invention, by clamping the installation auxiliary part to the top of the second I-beam, aligning the positioning hole with the connection hole of the full-welded hanging ear, placing the nut on the top surface of the pressing plate, the screw rod of the U-shaped connecting piece passes through the positioning hole, the round hole of the U-shaped connecting piece, the connection hole in the full-welded hanging ear and the nut, push the pressing plate to the lower part of the screw rod, drive the clamping plate to move after pushing the push rod, the clamping plate clamps to the outside of the nut, use an electric drill to rotate the screw rod to complete the preliminary fixation, then push the pressing plate away from the screw rod, use an electric drill to complete the fixed connection between the screw rod and the nut, and at the same time complete the connection between the full-welded hanging ear and the turnbuckle.

[0020] In addition, through this process, the technical problem of the cantilever I-beam in the cantilever slab lowering area is effectively solved. By erecting a 1.5m high I-beam at the rear, at this height, the steel wire rope can avoid collision with the internal frame body, ensuring the stability of the force transmission system.

[0021] In addition, the connection between the steel wire rope at the end of the cantilever I-beam and the full-welded hanging ear has a certain flexibility. The full-welded hanging ear can be set according to the situation of the external frame body at the end. The closer the hanging ear position is to the end of the cantilever I-beam, the lower the force on the steel wire rope.

[0022] In addition, by providing an upward pulling force near the end of the cantilever I-beam through the steel wire rope, by adjusting the force form of the cantilever I-beam, the steel wire rope provides a supporting force at the point of the full-welded hanging ear, which has the effect of reducing the cantilever distance of the I-beam in terms of the force form, improving the cantilever distance of the I-beam and increasing the applicable range of this process.

[0023] In addition, compared with the situation where the internal anchoring distance of the cantilever I-beam is 1.25 times the cantilever distance in the traditional method, the internal anchoring distance of this process is shorter, saving construction materials and costs. Description of the drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0025] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0026] In the drawings:

[0027] Figure 1 It is a structural schematic diagram of the cantilever I-beam erection device of the traditional construction process.

[0028] Figure 2 It is a structural schematic diagram of the device for erecting the cantilever I-beam of the external scaffolding of the present invention.

[0029] Figure 3 It is a structural schematic diagram of the usage position of the installation auxiliary part of the device for erecting the cantilever I-beam of the external scaffolding of the present invention.

[0030] Figure 4 It is a structural schematic diagram of the installation auxiliary part of the device for erecting the cantilever I-beam of the external scaffolding of the present invention.

[0031] Figure 5 It is a structural schematic diagram of the fixing plate of the device for erecting the cantilever I-beam of the external scaffolding of the present invention.

[0032] Figure 6 It is a sectional structural schematic diagram of the sleeve of the device for erecting the cantilever I-beam of the external scaffolding of the present invention.

[0033] List of reference numerals

[0034] 1, First I-beam; 2, Full-welded hanging ear; 3, Steel wire rope; 4, Flower basket bolt; 5, Embedded steel bar; 6, Second I-beam; 7, Installation auxiliary part; 701, Fixing plate; 7011, Card slot; 7012, Positioning hole; 702, Bracket; 703, Splint; 7031, Card slot; 7032, Push rod; 704, Sleeve; 705, Baffle plate; 8, Scaffold body; 9, External frame baffle. Detailed implementation manners

[0035] In order to make the purpose, solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.

[0036] Embodiment: Please refer to Figures 1 to 6 as shown in

[0037] The present invention provides a device for erecting a cantilever I-beam of an external scaffolding in a dropped slab area, including a first I-beam 1, an embedded steel bar 5 and a second I-beam 6; a scaffold body 8 is erected on the top surface of the first I-beam 1; the second I-beam 6 is embedded in the side beam, and full-welded hanging ears 2 are respectively welded on the left and right sides of the second I-beam 6, and a flower basket bolt 4 is fixedly connected to the full-welded hanging ear 2; the lower end of the flower basket bolt 4 is fixedly connected to a steel wire rope 3; the steel wire rope 3 is fixedly connected to the first I-beam 1; when the flower basket bolt 4 is installed outside the full-welded hanging ear 2, an installation auxiliary part 7 is clamped outside the flower basket bolt 4; the embedded steel bar 5 is embedded inside the floor; an external frame baffle 9 is installed on the outside of the scaffold body 8.

[0038] Among them, the middle of the embedded steel bar 5 is in a U-shaped structure and both ends are in a straight structure. The U-shaped part of the embedded steel bar 5 protruding from the floor is connected to the steel wire rope 3. By cooperating with the I-beam two 6, the steel wire rope 3 and the turnbuckle 4, a stable triangular force-bearing structure is formed.

[0039] Among them, the I-beam one 1 is fixedly installed in the cantilevered drop panel area through an internal anchor hoop. Using the traditional construction plan, a lower bracing channel steel is used to obliquely support the bottom surface of the I-beam one 1. The lower bracing channel steel will collide with the lower cantilevered scaffolding. Even if the lower bracing channel steel is designed to pass through the finished baffle on the outside of the scaffolding, the obliquely supported lower bracing channel steel will also affect the passage of personnel between the lower scaffolding, causing potential safety hazards. The erection device of the present invention avoids using the construction method of lower bracing, and there is no obstruction between the scaffolding bodies 8, thereby improving the safety during the use of the scaffolding.

[0040] Among them, one end of the turnbuckle 4 is fixedly connected to the full-welded hanging ear 2 by a U-shaped connecting piece in cooperation with a screw rod and a nut, and the other end is fixedly connected to the steel wire rope 3 by a fixed closed circular structure. The screw rod in the U-shaped connecting piece at the upper end of the turnbuckle 4 penetrates through the installation auxiliary piece 7. After the screw rod in the U-shaped connecting piece at the upper end of the turnbuckle 4 passes through the connecting hole in the full-welded hanging ear 2, the screw rod is tightened by using the installation auxiliary piece 7, thereby completing the connection between the turnbuckle 4 and the full-welded hanging ear 2.

[0041] Among them, the installation auxiliary part 7 includes a fixing plate 701, a bracket 702, a clamping plate 703, a sleeve 704 and a resisting plate 705. When the installation auxiliary part 7 is clamped to the second I-beam 6, the fixing plate 701 is located at the rear end face of the full-welded hanging ear 2, and the semi-circular plate on the installation auxiliary part 7 is located at the front end face of the full-welded hanging ear 2. The fixing plate 701 is provided with a limiting groove 7011 and a positioning hole 7012. The limiting groove 7011 is of an L-shaped structure, and the positioning hole 7012 corresponds to the position of the connecting hole inside the full-welded hanging ear 2. The inside of the bracket 702 is provided with a sliding groove, and a rectangular block is provided on the inner side of the bottom of the bracket 702, and the bracket 702 is fixedly welded to the fixing plate 701. The clamping plate 703 is of a right-angle structure, and a clamping groove 7031 is provided on the inner side of the bottom of the clamping plate 703. The upper part of the clamping groove 7031 is of a regular hexagon structure and the lower part is of a circular structure. The nut of the upper U-shaped connecting piece of the turnbuckle 4 is clamped inside the clamping groove 7031, and the lower circular hole of the clamping groove 7031 is penetrated by the screw rod of the U-shaped connecting piece. A push rod 7032 is further provided on the outer end face of the clamping plate 703. The end of the push rod 7032 is slidably clamped inside the sleeve 704, and a spring is arranged between the two push rods 7032 and inside the sleeve 704. After pushing the two push rods 7032 towards the middle, the clamping plate 703 is pushed to move, and at the same time the spring inside the sleeve 704 is compressed. The outer side of the resisting plate 705 is provided with a groove, and the rectangular block on the bracket 702 is slidably clamped inside the groove. After the installation auxiliary part 7 is clamped to the top of the second I-beam 6, the positioning hole 7012 is aligned with the connecting hole of the full-welded hanging ear 2. After the U-shaped connecting piece of the turnbuckle 4 is inserted into the installation auxiliary part 7, it is convenient for the threaded hole of the U-shaped connecting piece to be aligned with the positioning hole 7012, which is convenient for passing through the screw rod to connect the turnbuckle 4 and the full-welded hanging ear 2. The bracket 702 is used to provide sliding and positioning restrictions for the clamping plate 703, and at the same time the rectangular block of the bracket 702 provides a sliding and supporting basis for the resisting plate 705. When the push rod 7032 is pushed, the clamping plate 703 is driven to move, and the clamping plate 703 clamps to the outside of the nut. While the nut is clamped by the clamping groove 7031, the rotation of the screw rod is not affected. When the push rod 7032 is released, it can be automatically reset by the spring, and the spring can also apply a resisting force to the two push rods 7032 towards the outside to ensure that the clamping plate 703 remains stable after being inserted into the limiting groove 7011. After the nut is placed on the top surface of the resisting plate 705, the screw rod of the U-shaped connecting piece passes through the positioning hole 7012, the circular hole of the U-shaped connecting piece, the connecting hole in the full-welded hanging ear 2 and the nut, and the resisting plate 705 is pushed below the screw rod. After the nut is clamped by the clamping plate 703, the screw rod is rotated by an electric drill to complete the preliminary fixation, and then the resisting plate 705 is pushed away from the screw rod, and the electric drill is used to complete the fixed connection between the screw rod and the nut, and at the same time complete the connection between the full-welded hanging ear 2 and the turnbuckle 4.

[0042] The present invention discloses a construction process of an overhanging I-beam erection device for an external scaffold in a lowered slab area, including the following steps:

[0043] 1), The installation auxiliary 7 is clamped to the top of the I-beam two 6, the positioning hole 7012 is aligned with the connection hole of the full-welded hanging ear 2, after pushing the push rod 7032, the clamping plate 703 is driven to move, the clamping plate 703 is clamped to the outside of the nut, and after rotating the screw rod with an electric drill, the screw rod can be quickly connected to the nut, completing the connection between the turnbuckle 4 and the full-welded hanging ear 2;

[0044] 2), The I-beam one 1 is fixedly installed in the cantilevered slab lowering area through the internal anchor hoop, the embedded steel bar 5 is embedded inside the floor, and the I-beam two 6 is embedded in the side beam;

[0045] 3), The bottom end of the turnbuckle 4 is fixedly connected to the top end of the steel wire rope 3, and the bottom ends of the two groups of steel wire ropes 3 are respectively fixedly connected to the I-beam one 1 and the embedded steel bar 5;

[0046] 4), A scaffold body 8 is erected on the top surface of the I-beam one 1, and an outer scaffold baffle 9 is erected on the outside of the scaffold body 8.

[0047] The specific usage mode and function of this embodiment: In the present invention, after the installation auxiliary 7 is clamped to the top of the I-beam two 6, the positioning hole 7012 is aligned with the connection hole of the full-welded hanging ear 2. When the nut is placed on the top surface of the abutment plate 705, the screw rod of the U-shaped connecting piece passes through the positioning hole 7012, the round hole of the U-shaped connecting piece, the connection hole in the full-welded hanging ear 2 and the nut, and the abutment plate 705 is pushed below the screw rod. After pushing the push rod 7032, the clamping plate 703 is driven to move, the clamping plate 703 is clamped to the outside of the nut, and the preliminary fixation is completed by rotating the screw rod with an electric drill. Then, the abutment plate 705 is pushed away from the screw rod, and the fixation connection between the screw rod and the nut is completed by using an electric drill. At the same time, the connection between the full-welded hanging ear 2 and the turnbuckle 4 is completed. The I-beam 1 is fixedly installed in the cantilevered slab lowering area through the internal anchor hoop, the embedded steel bar 5 is embedded inside the floor, and the I-beam two 6 is embedded in the side beam. The bottom end of the turnbuckle 4 is fixedly connected to the top end of the steel wire rope 3, and the bottom ends of the two groups of steel wire ropes 3 are respectively fixedly connected to the I-beam one 1 and the embedded steel bar 5, completing the erection of the cantilever I-beam.

[0048] Finally, it should be noted that when the present invention describes the positions of various components and their cooperation relationships, etc., usually one / a pair of components are taken as examples. However, those skilled in the art should understand that such positions, cooperation relationships, etc. also apply to other components / other pairs of components.

[0049] The above is only an exemplary implementation mode of the present invention, rather than being used to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A device for erecting a cantilever I-beam of an external scaffold outside a lowered slab area, characterized in that Comprising: I-beam one (1), embedded steel bars (5) and I-beam two (6); a scaffolding body (8) is erected on the top surface of the I-beam one (1); the I-beam two (6) is embedded in the side beam, and full-welded hanging ears (2) are respectively welded on the left and right sides of the I-beam two (6), and a turnbuckle (4) is fixedly connected to the full-welded hanging ears (2); the lower end of the turnbuckle (4) is fixedly connected to a steel wire rope (3); the steel wire rope (3) is fixedly connected to the I-beam one (1); when the turnbuckle (4) is externally installed on the full-welded hanging ear (2), an installation auxiliary member (7) is clamped outside the turnbuckle (4); the embedded steel bars (5) are embedded inside the floor; an outer frame baffle (9) is installed on the outer side of the scaffolding body (8); The installation auxiliary member (7) includes a fixing plate (701). When the installation auxiliary member (7) is clamped onto the I-beam two (6), the fixing plate (701) is located at the rear end face of the full-welded hanging ear (2), and the semi-circular plate on the installation auxiliary member (7) is located at the front end face of the full-welded hanging ear (2). A limiting groove (7011) and a positioning hole (7012) are provided on the fixing plate (701). The limiting groove (7011) is of an L-shaped structure, and the positioning hole (7012) corresponds to the position of the connection hole inside the full-welded hanging ear (2); The installation auxiliary member (7) further includes a bracket (702). A chute is provided inside the bracket (702), a rectangular block is provided on the inner side of the bottom of the bracket (702), and the bracket (702) is fixedly welded to the fixing plate (701); The installation auxiliary member (7) further includes a clamping plate (703). The clamping plate (703) is of a right-angled structure, and a clamping groove (7031) is provided on the inner side of the bottom of the clamping plate (703). The upper part of the clamping groove (7031) is of a regular hexagon structure and the lower part is of a circular structure. The nut of the U-shaped connecting piece at the upper end of the turnbuckle (4) is clamped inside the clamping groove (7031), and the lower circular hole of the clamping groove (7031) is penetrated by the screw rod of the U-shaped connecting piece. A push rod (7032) is further provided on the outer end face of the clamping plate (703); The installation auxiliary member (7) further includes a sleeve (704). The end of the push rod (7032) is slidably clamped inside the sleeve (704), and a spring is arranged between the two push rods (7032) inside the sleeve (704); The installation auxiliary member (7) further includes a resisting plate (705). A groove is provided on the outer side face of the resisting plate (705), and the rectangular block on the bracket (702) is slidably clamped inside the groove; 2. The cantilever I-beam erection device for the external scaffolding outside the lowered slab area according to claim 1, characterized in that: The I-beam one (1) is fixedly installed in the cantilever slab lowering area through an internal anchoring hoop.

3. The cantilever I-beam erection device for the external scaffold outside the lowered slab area according to claim 1, characterized in that: One end of the turnbuckle (4) is fixedly connected to the full-welded hanging ear (2) by using a U-shaped connecting piece in cooperation with a screw rod and a nut, and the other end is fixedly connected to the steel wire rope (3) by using a fixed closed circular structure. The screw rod in the U-shaped connecting piece at the upper end of the turnbuckle (4) penetrates through the installation auxiliary member (7).

4. The erection device of the cantilever I-beam of the external scaffold outside the slab lowering area according to claim 1, characterized in that: The middle of the embedded steel bar (5) is of a U-shaped structure and both ends are of a straight structure. The U-shaped part of the embedded steel bar (5) protruding from the floor is connected to the steel wire rope (3).

5. The erection process of a cantilever I-beam erection device for an out-of-slump area scaffold according to any one of claims 1-4, characterized in that: Including the following steps: 1), The installation auxiliary (7) is clamped to the top of the second I-beam (6), the positioning hole (7012) is aligned with the connection hole of the full-welded hanging ear (2), and after pushing the push rod (7032), the clamping plate (703) is driven to move, and the clamping plate (703) is clamped to the outside of the nut. After rotating the screw with an electric drill, the screw and the nut can be quickly connected to complete the connection between the turnbuckle (4) and the full-welded hanging ear (2); 2), The first I-beam (1) is fixedly installed in the cantilevered drop plate area through the internal anchor hoop, the embedded steel bar (5) is embedded inside the floor, and the second I-beam (6) is embedded in the side beam; 3), The bottom end of the turnbuckle (4) is fixedly connected to the top end of the steel wire rope (3), and the bottom ends of the two groups of steel wire ropes (3) are respectively fixedly connected to the first I-beam (1) and the embedded steel bar (5); 4), A scaffolding body (8) is erected on the top surface of the first I-beam (1), and an outer scaffolding baffle (9) is erected on the outside of the scaffolding body (8).

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