Portal pier portal support

Abstract

The utility model belongs to the field of portal pier door hole support, specifically is portal pier door hole support, including disc buckle support, arch frame and distribution beam, the arch frame sets up four pieces, is connected with connecting rod between two adjacent pieces, the arch frame adopts the welding of G 16 type, G 10 type steel, the disc buckle support adopts heavy (Z type) support frame, and standard horizontal step distance is 1500mm, the distribution beam is welded between the arch frame and disc buckle support, the distribution beam is welded with the arch frame, through the structural design of full -scaffold + arch frame, has realized the fundamental nature of security promotion, has eliminated high -altitude suspended operation, and disc buckle support is the full -scaffold of ground erection, has provided the steady operating platform, and the installation, removal of arch frame and distribution beam are all carried out on the steady plane of support top, fundamentally avoided the risk of personnel operation in the suspended state, the utility model has improved construction flexibility and adaptability significantly, and this structure is independent of pier body, is not limited by pier body height, and high pier, low pier can be applicable.

Description

Technical Field

[0001] This utility model relates to the field of portal frame gate hole support, specifically portal frame gate hole support. Background Technology

[0002] Portal pier portal frame is a large temporary support structure erected below the portal opening during the construction of portal piers to support the weight of the formwork and concrete used for pouring the top crossbeam (cap beam).

[0003] In existing technology, the portal frame support for portal piers uses a corbel + arch structure, which has certain drawbacks: 1. Significant limitations on pier structure and construction process: It must be poured in two stages (first the pier body, then the pier cap), making it impossible to pour the entire structure in one go, which prolongs the construction period; There are requirements for the height of the pier body, and it is not suitable for low portal piers; A large number of corbel support components need to be pre-embedded in the concrete of the pier body. This not only increases the accuracy requirements and workload of the pre-embedding, but more importantly, it will leave permanent scars or holes on the surface of the pier body, affecting the appearance quality and long-term durability of the pier body. 2. Significant safety risks: Risks of working at heights: The installation and dismantling of corbels and arches are both high-altitude operations, especially the dismantling which requires manual labor in a suspended state, posing a high safety risk; Stability risk: As a cantilever structure, the load-bearing capacity and stability of the corbel are highly dependent on the quality of the pre-embedded parts and the strength of the concrete, which poses a potential uncertainty risk. Demolition risks: The demolition process requires cutting or knocking off embedded parts, which may cause impact or damage to the hardened concrete of the pier body. In addition, the workers are located under the scaffolding, which concentrates the risks. 3. Issues of economy and efficiency: High cost: Embedded parts (usually large steel materials) cannot be recycled or have low recycling rates, resulting in significant material loss; Long construction period: The construction period is extended due to multiple stages such as pre-embedding, waiting for concrete strength, installation, and dismantling; Labor-intensive: The installation and dismantling processes have a low degree of mechanization, requiring a large amount of manual labor and resulting in low efficiency. Therefore, a portal frame support for the portal hole is proposed to address the above issues. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, 1. there are significant limitations on the pier structure and construction process: It must be poured in two stages (first the pier body, then the pier cap), making it impossible to pour the entire structure in one go, which prolongs the construction period; There are requirements for the height of the pier body, and it is not suitable for low portal piers; A large number of corbel support components need to be pre-embedded in the concrete of the pier body. This not only increases the accuracy requirements and workload of the pre-embedding, but more importantly, it will leave permanent scars or holes on the surface of the pier body, affecting the appearance quality and long-term durability of the pier body. 2. Significant safety risks: Risks of working at heights: The installation and dismantling of corbels and arches are both high-altitude operations, especially the dismantling which requires manual labor in a suspended state, posing a high safety risk; Stability risk: As a cantilever structure, the load-bearing capacity and stability of the corbel are highly dependent on the quality of the pre-embedded parts and the strength of the concrete, which poses a potential uncertainty risk. Demolition risks: The demolition process requires cutting or knocking off embedded parts, which may cause impact or damage to the hardened concrete of the pier body. In addition, the workers are located under the scaffolding, which concentrates the risks. 3. Issues of economy and efficiency: High cost: Embedded parts (usually large steel materials) cannot be recycled or have low recycling rates, resulting in significant material loss; Long construction period: The construction period is extended due to multiple stages such as pre-embedding, waiting for concrete strength, installation, and dismantling; Labor-intensive: The installation and dismantling process has a low degree of mechanization, requires a large amount of manual labor, and has low efficiency. This utility model proposes a portal frame support for the pier.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a portal frame support, including a disc buckle support, an arch frame and a distribution beam; the arch frame is provided with four frames, and the adjacent frames are connected by connecting rods; the arch frame is welded with I-16 and I-10 steel; the disc buckle support adopts a heavy-duty (Z-type) support frame with a standard horizontal step distance of 1500mm. The distribution beam is located between the arch frame and the disc buckle bracket, and the distribution beam is welded to the arch frame.

[0006] Preferably, the top of the disc buckle bracket is adjusted horizontally according to the pier height, with a longitudinal bridge distance of 1200mm + 3×600mm + 1200mm.

[0007] As a preferred option, when the door opening span is 3000mm, 3350mm, or 3500mm, the lateral step distance of the disc buckle bracket is 4×600mm; when the door opening span is 4000mm, the lateral step distance of the disc buckle bracket is 5×600mm.

[0008] Preferably, the distribution beam is made of I-beam 10 steel.

[0009] The advantages of this utility model are: 1. This utility model achieves a fundamental improvement in safety through the structural design of full-span scaffolding + arch frame, eliminating high-altitude suspended operations. The disc-lock scaffolding provides a stable operating platform for the full-span scaffolding erected on the ground. The installation and dismantling of the arch frame and distribution beam are all carried out on the stable plane at the top of the scaffolding, fundamentally avoiding the risk of personnel operating in a suspended state. 2. This utility model significantly improves construction flexibility and adaptability, breaks through the limitations of pier height and pouring times. The structure is independent of the pier body and is not limited by the height of the pier body. It can be applied to both high and low piers. At the same time, it creates conditions for the one-time integral pouring of the pier body and pier cap (the crossbeam above the doorway), which can greatly reduce the construction cycle and eliminate the need for pre-embedding, thus protecting the pier body structure. 3. This utility model has a high material turnover rate and reduced costs. The disc buckle bracket, steel arch frame and distribution beam are all standard components that can be reused multiple times, resulting in low amortization costs and avoiding the one-time consumption of embedded parts. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the arch frame and distribution beam structure of this utility model; Figure 3 This is a schematic diagram of the disc buckle bracket structure of this utility model; Figure 4 This is a schematic diagram of the overall structure of this utility model and its installation with the portal pier's door hole.

[0012] In the diagram: 1. Disc-lock bracket; 2. Arch frame; 3. Distribution beam. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0014] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail. This application discloses a portal frame pier portal hole support in its embodiments. (Refer to...) Figures 1-4 The portal frame includes a disc buckle bracket 1, an arch frame 2, and a distribution beam 3. The arch frame 2 is set with four sections, and the two adjacent sections are connected by connecting rods. The arch frame 2 is welded with I-16 and I-10 steel. The disc buckle bracket 1 is a heavy-duty (Z-type) support frame with a standard horizontal step distance of 1500mm. The disc-lock scaffold 1 is a full-span scaffold erected on the ground, providing a stable operating platform. The installation and dismantling of the arch frame 2 and the distribution beam 3 are all carried out on the stable plane at the top of the scaffold, which fundamentally avoids the risk of personnel operating in a suspended state. The heavy-duty disc-lock scaffold 1 itself has extremely high load-bearing capacity and stability. Its modular and standardized design ensures that the mechanical performance of the overall structure is clear and reliable. The concentrated load of the arch frame 2 is effectively transferred to the scaffold uprights through the distribution beam 3, and the force path is clear and reasonable. The erection and dismantling of the disc buckle bracket 1 is relatively simple, and it relies less on skilled workers than the traditional bracket installation and dismantling, thus reducing labor costs and labor intensity. The steel used for arch frame 2 is approximately 1464 kg, and the scaffolding 1 is erected to a height of 94.5 m. 3 ; The distribution beam 3 is located between the arch frame 2 and the disc buckle bracket 1, and the distribution beam 3 is welded to the arch frame 2 and the disc buckle bracket 1 respectively.

[0015] This scheme is independent of the pier body and is not limited by the height of the pier body. It can be applied to both high and low piers. At the same time, it creates conditions for the pier body and pier cap (the crossbeam above the doorway) to be cast in one piece, which can significantly shorten the construction period. No pre-embedding is required, protecting the pier structure. This completely eliminates the need for pre-embedding parts in the pier, simplifying construction and protecting the integrity and aesthetics of the pier concrete.

[0016] Reference Figures 1-4 The top of the disc buckle bracket 1 is adjusted horizontally according to the pier height, with a longitudinal bridge step distance of 1200mm + 3×600mm + 1200mm.

[0017] Reference Figures 1-4 When the door opening span is 3000mm, 3350mm, or 3500mm, the lateral step distance of the disc buckle bracket 1 is 4×600mm; when the door opening span is 4000mm, the lateral step distance of the disc buckle bracket 1 is 5×600mm.

[0018] By adjusting the horizontal step distance (longitudinal 1200+3×600+1200mm) and the transverse step distance (4×600mm or 5×600mm depending on the span of the door opening) of the disc buckle bracket 1, it can flexibly adapt to portal piers with different spans (3000mm to 4000mm) and different heights, making it highly versatile.

[0019] Reference Figures 1-4 The distribution beam 3 is made of I-beam 10 steel.

[0020] Working principle: The disc-lock bracket 1 is laid from the ground to the bottom of the distribution beam 3. The arch frame 2 is the main load-bearing keel, which directly supports the concrete formwork. The distribution beam 3 and the top support of the disc-lock bracket 1 are reliably connected by welding or by using U-shaped brackets for fixing. The bottom formwork (usually large bamboo plywood or steel formwork) is laid on the arch frame 2, and then the side formwork and reinforcing bars are installed. At this point, the reinforcing bars of the entire portal pier (including the two pier columns and the pier cap above) can be tied together in one go, and the pier body and pier cap of the portal pier can be poured in one go. The weight of the concrete, construction load, etc. are all transferred through this clear path: bottom formwork - arch frame 2 - distribution beam 3 - disc-locked support 1 - foundation. Calculate the load: Permanent load: ① Concrete pressure at the arch crown, concrete unit weight taken as 26kN / m³ 3 ; ② Bottom formwork weight: 1kN / ㎡; Live load: ③ Construction load: 1.5kN / ㎡; ④ Vibration load: 2.0 kN / ㎡; ⑤ Impact load of poured concrete: 2.0 kN / ㎡; ⑥ Wind load: Basic wind pressure for 10 years, standard value 1.11 kN / ㎡; Basic load combination: 1.3 × (① + ②) + 1.5 × (③ + ④ + ⑤) Standard load combination: 1.0 × (① + ②) + 1.0 × (③ + ④ + ⑤) Main calculation results: 1. Arch deformation: 1mm < L / 400 = 4000 / 400 = 10mm; 2. Combined stress: 141.0 MPa < 215 MPa, with compressive stress at the top of the arch ring; 3. Disc-lock scaffold uprights: Standard value of live load axial force of a single upright kN 6.39 Standard value of bending moment caused by wind load kN*m 0.38 Design value of axial force for a single upright (combined wind) kN 71.70 Design value of axial force for a single upright (without combined wind) kN 72.60 Calculation results Stability stress design value (combined wind) MPa 277.36 Stable stress design value (without combined wind) MPa 231.17 .

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A portal frame support for a pier, characterized in that: It includes a disc buckle bracket (1), an arch frame (2) and a distribution beam (3); the arch frame (2) is provided with four frames, and the adjacent frames are connected by connecting rods. The arch frame (2) is welded with I-16 and I-10 steel. The disc buckle bracket (1) is a heavy-duty Z-type support frame with a horizontal step distance of 1500mm. The distribution beam (3) is located between the arch frame (2) and the disc buckle bracket (1), and the distribution beam (3) is welded to the arch frame (2).

2. The portal frame support according to claim 1, characterized in that: The top of the disc buckle bracket (1) is adjusted horizontally according to the pier height, with a longitudinal bridge step distance of 1200mm + 3×600mm + 1200mm.

3. The portal frame support according to claim 1, characterized in that: When the span of the door opening is 3000mm, 3350mm, or 3500mm, the horizontal step distance of the disc buckle bracket (1) is 4×600mm; when the span of the door opening is 4000mm, the horizontal step distance of the disc buckle bracket (1) is 5×600mm.

4. The portal frame support according to claim 1, characterized in that: The distribution beam (3) is made of I-10 steel.

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