An external protective scaffold suitable for the construction of assembled cast-in-place corridors

Abstract

The invention discloses an external protective scaffold suitable for the construction of an assembled cast-in-place corridor, comprising a scaffold main body, characterized in that: it also comprises a U-shaped pipe clamp, an I-beam and a positioning clamping device, wherein the U-shaped pipe clamp is pre-buried above the concrete cast-in-place corridor, and the U-shaped pipe clamp is welded to the corridor main beam steel bar into one body and forms an intersection weld; the I-beam is vertically installed on the cast-in-place corridor concrete with a curing strength greater than 75%, and the U-shaped pipe clamp is used to lock the I-beam with a double nut pressure plate; the positioning clamping device is clamped on the I-beam. In the present invention, the external scaffold is installed by pre-buried cast-in-place corridor U-shaped pipe clamps, by cantilevering the I-beams, and by lifting and flipping the layers, a safe, reliable and convenient scaffold is provided for the construction of cast-in-place reinforced concrete structures of the aerial corridors of assembled high-rise buildings.

Description

Technical Field

[0001] The invention relates to the field of prefabricated buildings, and in particular to an externally mounted protective scaffold suitable for the construction of prefabricated cast-in-situ corridors. Background Art

[0002] Prefabricated high-rise building sky corridors are often found between two taller buildings (main buildings). Their structure is a cast-in-place reinforced concrete structure. During construction, it is necessary to lay formwork and pour concrete, and to set up scaffolding for construction. However, when the sky corridor (mainly the beams supporting its main body) adopts a pure reinforced concrete structure, it cannot withstand external forces before solidification. During construction, it is even necessary to rely on other structures to ensure its accurate position, and formwork frames and scaffolding need to be set up. When the sky corridor is at a high ground height, the formwork frames and scaffolding are prone to instability, and relevant regulations do not allow this. Another way is to hang formwork trusses between two high buildings. Although this solution is feasible, it requires high costs and is difficult to dismantle. Summary of the invention

[0003] The purpose of the present invention is to provide an external protective scaffold suitable for the construction of assembled cast-in-place corridors, which adopts a cantilevered I-beam with a U-shaped pipe clamp embedded in the corridor, and the cantilevered I-beam is used as a fulcrum of the external scaffold to support the overall frame of two floor height templates of the external scaffold, and the symmetrical frame of the corridor section is used to maintain symmetrical balance by using a horizontal pull rod. It is convenient for the construction of cast-in-place corridors, and the tower crane is used to lift the whole layer by layer, which reduces the operation time and ensures the safety of operation. The appearance is simple and beautiful, and the installation and disassembly are convenient, and the cost is low.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an external protective scaffold suitable for the construction of an assembled cast-in-place corridor, comprising a scaffold body, a U-shaped pipe clamp, an I-beam and a positioning clamping device, wherein the U-shaped pipe clamp is pre-buried above the concrete cast-in-place corridor, and the U-shaped pipe clamp is welded to the corridor main beam steel bar into one body and forms an intersection weld; the I-beam is vertically installed on the cast-in-place corridor concrete with a curing strength greater than 75%, and the U-shaped pipe clamp is used to lock the I-beam with a double nut pressure plate; the positioning clamping device is clamped on the I-beam, and the positioning clamping device can slide along the axial direction of the I-beam; the scaffold body is detachably arranged on the positioning clamping device; wherein:

[0005] The protective scaffolding also includes the following installation steps:

[0006] Step 1: Pre-embed U-shaped pipe clamp;

[0007] Step 2: I-beam cantilever installation;

[0008] Step 3: The main body of the external scaffolding is installed on the I-beam using a positioning clamping device;

[0009] Step 4: After the upper construction layer corridor formwork and steel bar binding are completed, pre-embed the U-shaped pipe clamps according to step one, and then install the I-beams and the main body of the external scaffolding according to steps two and three, using a layer-by-layer flipping method for construction.

[0010] Furthermore, the U-shaped tube clamp includes a U-shaped tube, a nut and a limiting plate, threads are provided on the side surfaces of both ends of the U-shaped tube, through holes are provided at both ends of the limiting plate, the I-beam is arranged in the U-shaped tube, the nut is threadedly connected to the two ends of the U-shaped tube, and the limiting plate presses the I-beam down.

[0011] Furthermore, the positioning and clamping device includes a connecting block, a first clamping plate, a second clamping plate and a fastener, the fastener clamps the first clamping plate and the second clamping plate at the top and bottom of the top plate of the I-beam, the connecting block is fixedly arranged on the top surface of the first clamping plate, when the first clamping plate and the second clamping plate are clamped, the connecting block is located at the center position of the wide side of the top plate of the I-beam, the first clamping plate is a bending part, including a first horizontal plate and a first inclined plate, the length of the first horizontal plate is greater than the width of the I-beam, and the first inclined plate is The inclined surface on one side of the bottom of the top plate of the I-beam fits together, the second clamping plate is a bent part, including a second horizontal plate and a second inclined plate, the second horizontal plate fits together with the portion of the first horizontal plate extending out of the I-beam, the second inclined plate fits together with the inclined surface on the other side of the bottom of the top plate of the I-beam, the fastener is a bolt, a screw hole is provided through the portion of the first horizontal plate extending out of the I-beam, the second horizontal plate has a corresponding screw hole, the bolt is inserted into the two screw holes, and the connecting block has connecting holes that pass through the front and rear end surfaces.

[0012] Preferably, the main body of the hanging scaffolding is a two-layer walkway plate welded structural frame, the lower layer is a "sun"-shaped structure, the upper layer is an L-shaped frame, the upper L-shaped frame is equipped with no less than 2 lifting ears, and the external scaffolding and the corridor structure maintain a gap less than or equal to 200 mm. After the left and right external scaffoldings of the corridor section are installed on the I-beam, a horizontal cross bar is pulled in the middle of the left and right external scaffoldings at the two ends, and the number of horizontal pull rods is greater than 2.

[0013] Preferably, the frame structure material is 50*50*2.5 square steel pipe cross beam, 50*50*2.5 square steel pipe vertical pole, 30*30*1.2 square steel pipe protective middle cross bar, 2mm thick patterned (DB) board, 250mm high skirting board, 0.6mm thick protective mesh, the ear material is not less than 10mm steel plate, and the horizontal pull rod material is 50*50*2.5 square steel pipe.

[0014] Preferably, the spacing between the pre-buried U-shaped pipe clamps is no more than 1800 mm.

[0015] Preferably, the external scaffolding body is connected to the positioning clamping device on the I-beam using M16 bolts.

[0016] Technical effects and advantages of the present invention:

[0017] 1. In the present invention, by pre-embedding the U-shaped pipe clamps of the cast-in-place corridor in advance, by cantilevering the I-beam, installing the external scaffolding, and adopting the layer-by-layer lifting and flipping method, a safe, reliable and convenient scaffolding is provided for the construction of the cast-in-place reinforced concrete structure of the aerial corridor of the assembled high-rise building;

[0018] 2. In the present invention, the external hanging scaffolding is connected to the cantilevered I-beam by a positioning clamping device, the cantilevered I-beam is a symmetrical structure hanging scaffolding, and there is a horizontal tie rod in the middle of the symmetrical external hanging scaffolding. The external hanging scaffolding adopts an integral welded structure, and the overall structure height does not exceed 2 roof heights. Its structural characteristics will not cause the scaffolding to become unstable;

[0019] 3. In the present invention, the external scaffolding adopts an integral welded structure and a layer-by-layer tower crane lifting and flipping method. It is easy to construct and operate, easy to install and disassemble, and has lower economic benefits than traditional scaffolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation process of the external scaffolding of the cast-in-place reinforced concrete structure of the high-rise building aerial corridor of the present invention;

[0021] Figure 2 This is a cross-sectional view of an external scaffolding of a cast-in-place reinforced concrete structure of an aerial corridor of the present invention;

[0022] Figure 3 This is a schematic diagram of the external hanging scaffolding assembly structure of the cast-in-place reinforced concrete structure of the aerial corridor of the present invention;

[0023] Figure 4 This is a schematic diagram of the main structure of the cast-in-place reinforced concrete structure external hanging scaffolding of the aerial corridor of the present invention;

[0024] Figure 5 This is a schematic cross-sectional view of the cast-in-place reinforced concrete structure of the U-shaped pipe clamp pre-buried corridor of the present invention;

[0025] Figure 6 This is a schematic diagram of the U-shaped pipe clamp structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the assembly of the I-beam positioning and clamping device of the present invention;

[0027] Figure 8It is a structural schematic diagram of the I-beam positioning and clamping device of the present invention.

[0028] In the figure: connecting block-1, first horizontal plate-2, first inclined plate-3, second horizontal plate-4, second inclined plate-5, U-shaped tube-6, nut-7, and limiting plate-8. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention provides an external protective scaffold suitable for the construction of an assembled cast-in-place corridor as shown in the attached drawings, including a method for pre-embedding a U-shaped pipe clamp in an aerial corridor cast-in-place reinforced concrete structure, an I-beam cantilevering method, an I-beam positioning clamping device installation method, and an external scaffold installation method, and the specific steps are as follows:

[0031] Step 1: Pre-embedded U-shaped pipe clamps: The pre-embedded U-shaped pipe clamps have a wire diameter of 18mm≤d2≤25mm, a U-shaped width of 120mm≤A≤200mm, and a U-shaped length of 380mm≤h1≤500mm. They are pre-embedded above the concrete cast-in-place corridor. The U-shaped pipe clamps must be welded to the corridor main beam steel bars and form an intersection weld to ensure the firmness of the welding. Ensure that the welded pre-embedded U-shaped pipe clamps can clamp and press not less than the specification range of 16# I-beams; the spacing between the pre-embedded U-shaped pipe clamps is not greater than 1800mm, and the horizontal and vertical dimensional position errors of the pre-embedded U-shaped pipe clamps do not exceed ±15mm;

[0032] Step 2, cantilever installation of I-beams: When the curing strength of the cast-in-place corridor concrete is greater than 75%, start installing I-beams. The specification of I-beams should not be less than 16#, and the cantilever length of I-beams should not be greater than 1500mm from the edge of the corridor main beam structure. Positioning clamping devices are installed on the cantilevered I-beams to connect to the external scaffolding. Each I-beam is equipped with 4 positioning clamping devices, and the I-beam can be displaced axially. The U-shaped pipe clamp uses a double-nut pressure plate to lock the I-beam to ensure the verticality of the installed cantilevered I-beam and the corridor structure. Ensure that the two U-shaped pipe clamp pressure plates on the I-beam are locked to the connection with the corridor;

[0033] Step 3: Installation of external scaffolding: After installing the I-beam and the positioning clamping device, use a tower crane to install the external scaffolding on the cantilevered I-beam and connect it to the positioning clamping device. There should be no less than 2 cantilevered I-beams. The external scaffolding is a two-layer walkway plate welded structure frame, the lower layer is a "sun" type structure, the upper layer is an L-shaped frame, and the upper layer L-shaped frame is equipped with no less than 2 lifting ears for tower crane lifting. The frame structure material is a 50*50*2.5 square steel pipe beam, a 50*50*2.5 square steel pipe vertical pole, a 30*30*1.2 square steel pipe protective middle crossbar, a 2mm thick patterned (DB) board, a 250mm high skirting board, a 0.6mm thick protective mesh, and a steel plate of no less than 10mm. The external scaffolding is connected to the positioning clamping device on the I-beam with M16 bolts, and the external scaffolding and the corridor structure maintain a gap of no more than 200mm. After the external scaffolding on the left and right sides of the corridor section is installed on the I-beam, a horizontal crossbar needs to be pulled in the middle of the two ends of the external scaffolding. Without interfering with the construction of the upper layer of the cast-in-place corridor, the horizontal crossbar should be installed as close to the upper part as possible to ensure the mechanical balance of the two ends of the external scaffolding. The number of horizontal tie rods should be no less than 2, and the material of the horizontal tie rod is 50*50*2.5 square steel pipe. The flap is installed on the walkway board of the external scaffolding to prevent excessive voids and ensure safety;

[0034] Step 4: Flip construction: After the upper construction layer corridor formwork and steel bar binding are completed, pre-embed U-shaped pipe clamps according to step 1, and then install I-beams and external scaffolding according to steps 2 and 3. The layer-by-layer hoisting and flipping method is adopted to ensure the layer-by-layer construction of the cast-in-place corridor.

[0035] The positioning clamping device includes a connecting block 1, a first clamping plate, a second clamping plate and a fastener. The fastener clamps the first clamping plate and the second clamping plate at the top and bottom of the top plate of the I-beam. The connecting block is fixedly arranged on the top surface of the first clamping plate. When the first clamping plate and the second clamping plate are clamped, the connecting block 1 is located at the center of the wide side of the top plate of the I-beam. The first clamping plate is a bending part, including a first horizontal plate 2 and a first inclined plate 3. The length of the first horizontal plate 2 is greater than the width of the I-beam. The first inclined plate 3 and the I-beam are The inclined surface on one side of the bottom of the top plate fits together, the second clamping plate is a bent part, including a second horizontal plate 4 and a second inclined plate 5, the second horizontal plate 4 fits together with the part of the first horizontal plate 2 extending out of the I-beam, the second inclined plate 5 fits together with the inclined surface on the other side of the bottom of the top plate of the I-beam, the fastener is a bolt, a screw hole is opened through the part of the first horizontal plate 2 extending out of the I-beam, the second horizontal plate 4 has a corresponding screw hole, the bolt is inserted into the two screw holes, and the connecting block 1 has connecting holes that pass through the front and rear end faces.

[0036] In step one, the U-shaped pipe clamps that need to be embedded in the cast-in-place corridor need to be welded to the corridor main beam steel bars; in step one, the spacing between the U-shaped pipe clamps that need to be embedded in the cast-in-place corridor is not more than 1800mm; in step two, the installation of I-beams needs to wait until the curing strength of the cast-in-place corridor concrete is greater than 75%; the specification of the I-beams installed in step two is not less than 16#; the cantilever length of the I-beams in step two is not more than 1500mm from the edge of the corridor main beam structure; in step two, each I-beam is equipped with 4 positioning clamping devices, and can be axially displaced in the I-beam; in step three, the external scaffolding is installed on the cantilever of the I-beam, and there are no less than 2 cantilevered I-beams; in step three, the external scaffolding is a two-story walkway plate welded structure frame, the lower layer is a Japanese-shaped structure, the upper layer is an L-shaped frame, and the upper L-shaped frame is equipped with no less than 2 lifting ears for tower crane hoisting. The frame structure material is 50*50*2.5 square steel pipe beam, 50*50*2.5 square steel pipe for vertical pole, 30*30*1.2 square steel pipe for protection middle cross bar, 2mm thick pattern (DB) board for walkway board, 250mm high skirting board, 0.6mm thick protective perforated mesh, and the hanging ear material is steel plate not less than 10mm; in step 3, the external hanging scaffolding is connected to the positioning clamping device on the I-beam with M16 bolts, and the external hanging scaffolding is connected to the corridor structure. Maintain a gap of no more than 200mm; after the left and right external scaffolding of the corridor section in step three is installed on the I-beam, a horizontal tie rod needs to be pulled in the middle of the left and right external scaffolding at both ends. Without interfering with the construction of the upper cast-in-place corridor, the horizontal tie rod should be installed as close to the upper part as possible to ensure the mechanical balance of the left and right external scaffolding at both ends. The number of horizontal tie rods should be no less than 2, and the material of the horizontal tie rod is 50*50*2.5 square steel pipe; In step three, a flap is installed on the walkway board of the external scaffolding.

[0037] The U-shaped pipe clamp includes a U-shaped pipe 6, a nut 7 and a limiting plate 8. The U-shaped pipe has threads on its two end sides, and the limiting plate 8 has through holes at both ends. The I-beam is arranged in the U-shaped pipe 6, and the nut 7 is threadedly connected to the two ends of the U-shaped pipe 6, and the limiting plate 8 presses the I-beam downward.

[0038] See also Figure 4 The invention discloses an external protective scaffolding suitable for the construction of prefabricated cast-in-place corridors. The I-shaped cantilever external scaffolding frame structure comprises two parts, the lower layer is a Japanese-shaped frame, and the upper layer is an L-shaped frame.

[0039] See also Figure 5-6 The U-shaped pipe clamp structural parts are embedded in the cast-in-place reinforced concrete structure of the aerial corridor and welded to the steel bars of the corridor main beam.

[0040] See also Figure 7-8 , I-beam positioning and clamping device structural parts, assembly connection on the I-beam.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An external protective scaffold suitable for the construction of assembled cast-in-place corridors, comprising a scaffold body, the characteristics of which are In: It also includes a U-shaped pipe clamp, an I-beam and a positioning clamping device. The U-shaped pipe clamp is pre-buried above the concrete cast-in-place corridor. The U-shaped pipe clamp is welded to the corridor main beam steel bar to form an intersecting weld; the I-beam is vertically installed on the cast-in-place corridor concrete with a curing strength greater than 75%, and the U-shaped pipe clamp is used to lock the I-beam with a double nut pressure plate; the positioning clamping device is clamped on the I-beam, and the positioning clamping device can slide along the axial direction of the I-beam; the scaffolding body is detachably arranged on the positioning clamping device; wherein: The protective scaffolding also includes the following installation steps: the first step: pre-embed U-shaped pipe clamps; Step 2: I-beam cantilever installation; Step 3: The main body of the external scaffolding is installed on the I-beam using a positioning clamping device; The fourth step: after the upper construction layer corridor formwork and steel bar binding are completed, the U-shaped pipe clamp is embedded in accordance with step one, and then the I-beam and the external scaffolding body are installed in accordance with steps two and three, and the construction is carried out in a layer-by-layer flipping manner; the positioning clamping device comprises a connecting block, a first clamping plate, a second clamping plate and a fastener, and the fastener clamps the first clamping plate and the second clamping plate at the top and bottom of the top plate of the I-beam, and the connecting block is fixedly arranged on the top surface of the first clamping plate. When the first clamping plate and the second clamping plate are clamped, the connecting block is located at the center position of the wide side of the top plate of the I-beam, and the first clamping plate is a bending part, including a first horizontal plate and a first inclined plate. The length of the first horizontal plate is greater than the width of the I-beam, and the first inclined plate is fitted with the inclined surface on the bottom side of the top plate of the I-beam, and the second clamping plate is a bending part, including a second horizontal plate and a first inclined plate. A flat plate and a second inclined plate, the second horizontal plate is fitted with the portion of the first horizontal plate extending out of the I-beam, the second inclined plate is fitted with the inclined surface on the other side of the bottom of the top plate of the I-beam, the fastener is a bolt, a screw hole is provided on the portion of the first horizontal plate extending out of the I-beam, and a screw hole is provided on the corresponding second horizontal plate, the bolt is passed through the two screw holes, and the connecting block has connecting holes on the front and rear end surfaces; the main body of the hanging scaffolding is a two-story walkway plate welded structure frame, the lower layer is a "sun" type structure, the upper layer is an L-shaped frame, the upper layer is equipped with no less than 2 hanging ears, the external scaffolding and the corridor structure maintain a gap of less than or equal to 200mm, after the left and right external scaffoldings of the corridor section are installed on the I-beam, a horizontal cross bar is pulled in the middle of the left and right external scaffoldings at the two ends, and the number of horizontal pull rods is greater than 2.

2. According to claim 1, an external protective scaffold suitable for the construction of an assembled cast-in-place corridor is characterized in that: The U-shaped pipe clamp includes a U-shaped pipe, a nut and a limiting plate. The side surfaces of the two ends of the U-shaped pipe are provided with threads, the two ends of the limiting plate are provided with through holes, the I-beam is arranged in the U-shaped pipe, the nut is threadedly connected to the two ends of the U-shaped pipe, and the limiting plate presses the I-beam down.

3. According to claim 1, an external protective scaffold suitable for the construction of an assembled cast-in-place corridor is characterized in that: The frame structure material is 50*50*2.5 square steel pipe beam, the vertical pole is 50*50*2.5 square steel pipe, the protective middle cross bar is 30*30*1.2 square steel pipe, the walkway board is 2mm thick patterned board, the skirting board is 250mm high, the protective mesh is 0.6mm thick, the ear material is not less than 10mm steel plate, and the horizontal pull rod is made of 50*50*2.5 square steel pipe.

4. According to claim 1, an external protective scaffold suitable for the construction of an assembled cast-in-place corridor is characterized in that: The spacing between the embedded U-shaped pipe clamps shall not exceed 1800mm.

5. According to claim 1, an external protective scaffold suitable for the construction of an assembled cast-in-place corridor is characterized in that: The main body of the external scaffolding is connected to the positioning clamping device on the I-beam using M16 bolts.

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