Prefabricated arch structure

Abstract

The utility model relates to building construction structure technical field, concretely points to a kind of fabricated arch structure. Including arch seat foundation, still including multiple layers arch beam being set on arch seat foundation;Multiple layers arch beam is stacked along vertical direction and is closely connected;The both ends of arch beam are fixed on the arch seat foundation of both sides respectively, and arch beam is the arch structure that multiple UHPC prefabricated block units are mutually spliced along arch beam width direction and arc length direction. The arch structure of the application is formed by splicing multiple block units, and the assembling structure is simple, the block unit is light in weight, construction is more convenient, the arch structure formed is stable and firm, effectively reduces dust, noise and sewage discharge in construction site.

Description

Technical Field

[0001] This utility model relates to the field of building construction structure technology, specifically to a prefabricated arch structure. Background Technology

[0002] Arched structures are widely used in architecture, transportation, and other fields due to their unique mechanical properties and aesthetic value. They not only cover large-span spaces but also withstand enormous loads. Currently, most arched structures are cast-in-place, requiring thick structural layers and involving large-volume concrete pouring. This results in slow construction speeds, difficulty in effectively controlling construction quality, and slow repair speeds when damaged or damaged, significantly impacting the structure's durability and performance.

[0003] Considering future structural load requirements, if UHPC (Ultra-High Performance Concrete) cast-in-place structures are adopted, such as the existing technology of a precast UHPC arched lintel, this technology provides an arched beam. The precast concrete lintel includes carbon fiber cloth, UHPC precast blocks, and embedded hanging nails. The carbon fiber cloth is placed on the outer periphery of the UHPC precast blocks. The crossbeam assembly includes an I-beam and a matching hook assembly. The hook assembly includes hooks and slings, with multiple hooks and slings, each located at the lower end of the I-beam. Both ends of the UHPC precast blocks are connected to the wall. The contact area between the UHPC precast blocks and the wall has a grooved connection. The hooks have a release protection structure. This arched beam structure is simple, and the segmented design facilitates transportation and effectively reduces transportation costs. However, in actual use, this arched beam can only be used for small beam structures. When applied to large beam structures, due to the large thickness of the structure and the large volume of concrete, the large volume of UHPC is difficult to pour. There is currently no good way to control the high heat of hydration generated. Casting large volume UHPC structures in place will lead to structural cracking, which will greatly affect the structural stress performance. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of the aforementioned background technology and provide a prefabricated arch structure.

[0005] The technical solution of this application is: a prefabricated arch structure, including an arch base foundation, and a multi-layer arch beam set on the arch base foundation; the multi-layer arch beams are stacked vertically and tightly connected; the two ends of the arch beams are respectively fixed to the arch base foundations on both sides, and the arch beams are an arch structure formed by splicing multiple UHPC prefabricated block units together along the width direction and arc length direction of the arch beams.

[0006] According to the prefabricated arch structure provided in this application, the block unit is a regular hexagonal block structure.

[0007] According to the prefabricated arch structure provided in this application, the side of the block unit is tightly connected to the side of the adjacent block unit by epoxy mortar.

[0008] According to the prefabricated arch structure provided in this application, the joints of adjacent block units on the same floor do not overlap with the joints of adjacent block units on the same floor of the vertically adjacent floor in the vertical direction.

[0009] According to the prefabricated arch structure provided in this application, a fixed structure is provided between two vertically adjacent block units.

[0010] According to the prefabricated arch structure provided in this application, the fixing structure includes a screw rod; the screw rod passes vertically through the screw holes on two adjacent block units to fix the adjacent two-sided block units into one unit.

[0011] According to the prefabricated arch structure provided in this application, the fixing structure includes finely rolled threaded steel bars that pass through through holes in all block units along the arc length direction perpendicular to the arch beam.

[0012] According to the prefabricated arch structure provided in this application, the block unit is provided with multiple through holes, and the multiple through holes are evenly spaced around the center of the regular hexagon of the block unit.

[0013] According to the prefabricated arch structure provided in this application, the central angles of adjacent arch beams are the same.

[0014] According to the prefabricated arch structure provided in this application, a support frame located between two sets of arch bases is also included to support the block units during the assembly of the block units.

[0015] The advantages of this application are: 1. This application uses multiple UHPC prefabricated blocks to assemble an arched beam, which has a simple structure, the prefabricated block units are lightweight and easy to construct, effectively reducing dust, noise and sewage discharge at the construction site, meeting green construction standards, and effectively reducing energy consumption and carbon emissions. 2. The block unit of this application is a regular hexagonal structure. These hexagonal block units can interlock tightly, forming a stable honeycomb-like structure with good overall stability. This effectively distributes the load to surrounding adjacent blocks. Geometrically, it is closer to a circle, resulting in a more uniform internal stress distribution, avoiding stress concentration and reducing the risk of cracking. Due to the system's interlocking and redundancy, damage is usually limited to a localized area and will not lead to overall failure. Damaged individual or a small number of blocks can be relatively easily removed and replaced with new blocks, resulting in low maintenance costs and fast repair speed. 3. The block units of this application are easy to splice together, and the assembly into arch beams is convenient. The precast UHPC block units have a small casting volume, and the hydration heat problem is controllable. Moreover, relying on standardized workshops and automated equipment, they are not affected by external factors such as weather. The entire process from raw material ratio to finished product curing is controllable. The mold and assembly line operation ensure that the component size error is extremely small, effectively avoiding common quality problems such as honeycomb, pitting, and cracks. 4. This application staggers the joints, which makes the precast blocks between layers interlock and distribute the stress. The staggered joints can block the vertical channels for the transmission of external forces, moisture and other adverse external factors, reduce structural damage and improve the structural stability and durability of the arch beam. 5. This application uses a fixed structure to fix adjacent arched beams, which is simple to operate and results in a stable arched structure that is not easy to collapse. 6. The fixing structure of this application is very simple. Adjacent block units can be fixed together as one unit by means of screw structure, which is easy to operate; 7. This application uses precision-rolled threaded steel bars to fix multiple vertical block units into one unit, making the operation and construction simpler; 8. By uniformly distributing through holes, this application ensures that the block unit is subjected to balanced forces after being connected with vertically adjacent block units, making it less prone to damage; 9. The central angles of the two adjacent arched beams in this application are the same, ensuring that the two adjacent arched beams are tightly fitted, the joints are tightly connected, the stress is good, and they are not easily damaged. 10. This application facilitates assembly and construction by setting up a support structure between the arched bases.

[0016] The arch structure of this application is formed by splicing multiple block units. The assembly structure is simple, the block units are lightweight, and the construction is more convenient. The resulting arch structure is stable and firm, effectively reducing dust, noise and sewage discharge at the construction site. Attached Figure Description

[0017] Figure 1 : A schematic diagram of the arched structure of this application; Figure 2 : A schematic diagram of the block unit splicing in this application; Figure 3 : A schematic diagram of the block unit structure of this application; Figure 4 : Schematic diagram of the multi-layer arched beam structure with precision rolled threaded steel bars in this application; Figure 5 This application includes a schematic diagram of the arch foundation and support construction. Figure 6 This application includes a schematic diagram of the lowest arched beam during construction. Figure 7 This application includes a schematic diagram of the second-floor arched beam. Figure 8 This application includes a schematic diagram of the third-floor arched beam. Wherein: 1—arch foundation; 2—block unit; 3—through hole; 4—precision rolled threaded steel; 5—support. Detailed Implementation

[0018] The embodiments of this application are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] This application relates to a prefabricated arch structure. The arch structure of this application is formed by assembling multiple UHPC prefabricated block units. Compared with traditional cast-in-place arch structures, the construction of the arch structure of this application is simpler. It eliminates the need for large-scale on-site pouring; only a suitable number of block units need to be prefabricated in the prefabrication project, and then assembled according to the designed arch structure to complete the construction. The operation is much simpler. The block units are lightweight and easy to construct, effectively reducing dust, noise, and wastewater discharge at the construction site, meeting green construction standards, and effectively reducing energy consumption and carbon emissions.

[0023] Specifically, such as Figures 1-8As shown, this embodiment of a prefabricated arch structure includes an arch base 1, of which there are two sets, placed on both sides of the arch beam to be constructed. The arch structure also includes multi-layered arch beams set on the arch base 1. The multi-layered arch beams are stacked vertically and tightly connected. The two ends of the arch beams are respectively fixed to the arch base 1 on both sides. The arch beams are an arch structure formed by splicing multiple UHPC prefabricated block units 2 together along the width and arc length directions of the arch beams.

[0024] The arched structure of this application includes multiple layers of arched beams, which are stacked vertically, or along the arc length of the arched beams, or along the radial direction of the arched beams. The multiple layers of arched beams are fixedly connected to each other, ultimately forming an integral arched structure.

[0025] Each layer of arched beams is formed by assembling multiple block units 2. The block units 2 in this application are assembled in two directions, namely along the width direction of the arched beam, such as... Figure 2 The vertical direction shown is along the arc length of the arched beam, as follows: Figure 2 As shown in the left and right directions. Including the assembly structure of the adjacent arched beams, the block unit 2 of this application is assembled in three directions.

[0026] The number of layers of the arched beam is determined according to the actual situation, in this application. Figure 1 The diagram shows three layers, but in actual applications, it is not limited to three layers and can be multi-layered.

[0027] In actual construction, the arch foundation 1 is first constructed on the construction site, and the block units 2 are fabricated in the prefabrication plant. After the arch foundation 1 is completed, a support 5 is erected between the two sets of arch foundations 1. The upper end face of the support 5 is the arc-shaped end face that conforms to the arch beam. The bottom layer of arch beams is assembled on the upper end face of the support 5, and the block units 2 are assembled along the width and arc length directions. After the bottom layer of arch beams is assembled, the second layer of arch beams is assembled, and so on, until all arch beams are assembled. Then all arch beams are fixed together to form the required arch structure. The support 5 below is then removed, and the construction of the arch structure is completed.

[0028] In some embodiments of this application, the block unit 2 described above has been optimized, such as... Figure 2 and 3 As shown, the block unit 2 in this embodiment is a regular hexagonal block structure. During assembly, the side of the block unit 2 is tightly connected to the side of the adjacent block unit 2 through epoxy mortar.

[0029] The regular hexagonal block unit 2 possesses excellent integrity and stability. Adjacent block units 2 can interlock tightly, forming a stable honeycomb-like structure with good overall stability. The regular hexagonal block unit 2 effectively distributes the load to surrounding adjacent block units 2, and its geometry is closer to a circle, resulting in a more uniform internal stress distribution, avoiding stress concentration and reducing the risk of cracking. Due to the interlocking and redundancy of the regular hexagonal block unit 2, damage is usually limited to a localized area, preventing overall failure. Furthermore, damaged individual or a few block units 2 can be relatively easily removed and replaced with new ones, resulting in low maintenance costs. High speed; the prefabricated arch structure formed by block unit 2 has stable quality and high construction efficiency. Traditional cast-in-place large-volume UHPC structures have large heat of hydration, with the internal temperature of the structure approaching 100 degrees Celsius, and there are no effective cooling measures. Cast-in-place UHPC large-volume structures are very prone to cracking. However, the volume of a single block unit 2 in this embodiment is small, the heat of hydration problem can be controlled, and relying on standardized workshops and automated equipment, it is not affected by external factors such as weather. The entire process from raw material ratio to finished product curing is controllable. The mold and assembly line operation ensure that the component size error is extremely small, effectively avoiding common quality problems such as honeycomb, pitting, and cracks.

[0030] Block unit 2 has a regular hexagonal structure on both the front and back sides, as shown in the specific structure below. Figures 2-4 As shown, to match the arched structure of the arched beam, the front and back of block unit 2 are curved surfaces with a certain curvature. However, the side lengths of the front and back are six, and the length of each side is the same, ensuring that adjacent block units 2 can be tightly interlocked and connected as a whole. Adjacent block units 2 are connected by epoxy mortar to form an integral structure.

[0031] In actual construction, to improve the stability of the entire arch structure, the joints of adjacent block units 2 on the same floor in this embodiment do not overlap with the joints of adjacent block units 2 on the same floor of the vertically adjacent floor. This staggered joint construction ensures that the joints along the vertical arc length do not overlap. The staggered joint treatment allows the precast blocks between floors to interlock, distributing the stress and blocking the vertical channels for the transmission of external forces, moisture, and other adverse external factors, thus reducing structural damage and improving the structural stability and durability of the arch beam. The layout can be referred to in the appendix. Figure 4 As shown.

[0032] In some other embodiments of this application, the arched structure has been further optimized. Specifically, a fixed structure is provided between two vertically adjacent block units 2.

[0033] The fixing structure includes a screw rod, which passes vertically through screw holes on two adjacent block units 2 to secure them together. The screw rod can fix the block units 2 of two layers of arched beams together. For example, after assembling the bottom layer of arched beams, when installing the second layer, the through holes 3 on the block units 2 of the second layer are aligned with the through holes on the block units 2 of the bottom layer, and then the screw rod is inserted into the aligned through holes 3. The screw rod then secures the two adjacent block units 2 along the vertical arc length direction together. When assembling the third layer of arched beams, the screw rod is used to secure the block units 2 of the third layer and the second layer together, and so on.

[0034] Fixed structures also include another form, such as Figure 4 As shown, the fixing structure includes precision-rolled threaded steel bars 4 that pass through the through holes 3 of all block units 2 along the vertical arc length direction of the arched beam. Each precision-rolled threaded steel bar 4 passes through all block units 2 along the vertical arc length direction. In actual installation, the bottom arched beam, the second arched beam, the third arched beam, and so on are assembled in sequence. After all the arched beams are assembled, the through holes of the block units 2 of the multi-layered arched beams along the vertical arc length direction are aligned. Then, the precision-rolled threaded steel bars 4 are inserted into the aligned through holes 3, and nuts and other structures are installed at the two protruding ends of the precision-rolled threaded steel bars 4 to fix all the block units 2 together as one unit.

[0035] Using precision-rolled threaded steel bars 4 to fix block unit 2 requires that the through holes 3 on block unit 2 be arranged in a specific pattern, such as... Figures 2-4 As shown, the block unit 2 has multiple through holes 3, which are evenly spaced around the center of the regular hexagon of the block unit 2. In this embodiment, each block unit 2 has three through holes 3, which are evenly spaced around the center of the regular hexagon of the block unit 2, with a 120° interval between each other.

[0036] In a further embodiment of this application, the stacking arrangement of the arched beams is optimized. Specifically, the central angles of adjacent layers of arched beams are the same. Having the same central angles ensures that the arc-shaped end faces of adjacent layers of arched beams fit tightly together, allowing the arched beams to form an integral structure with better structural stress.

[0037] The prefabricated arch structure described in this application can be constructed according to the following steps: S1. Construct the arch foundation 1 and support 5, such as... Figure 5 As shown; S2. Based on support 5, install the bottom arch beam. Prefabricate block units 2 in the prefabrication plant. The distance between the parallel sides of a single block unit 2 is 3m, the thickness is 1m, the block radius is R + 0.5m, and the volume of a single block is 7.8m. 3 The lifting weight of a single block is 0.195t; epoxy mortar is used to fill the gaps between block units 2. The plan layout of the arched beam is shown in the attached drawing. Figure 6 As shown; S3. Based on the completed bottom-layer arch beam, install the second-layer arch beam. The central angle of the second-layer arch beam is the same as that of the bottom-layer arch beam. According to calculations, the distance between the parallel edges of the block unit 2 of the second-layer arch beam is 3*(1.348L+1) / 1.348L, with a thickness of 1m. To achieve better load-bearing performance, the block unit 2 of the bottom-layer arch beam and the second-layer arch beam are installed with staggered joints. Epoxy mortar is also used for interlayer connection between the bottom-layer arch beam and the second-layer arch beam. Figure 7 As shown; S4. Based on the completed second-layer arch beam, install the third-layer arch beam. The central angle of the third-layer arch beam is the same as that of the second-layer arch beam. According to calculations, the distance between the parallel sides of the block unit 2 of the third-layer arch beam is 3*(1.348L+2) / 1.348L, with a thickness of 1m. To achieve better load-bearing performance, the block units 2 of the second and third-layer arch beams are installed with staggered joints. Epoxy mortar is also used for interlayer connection between the second and third-layer arch beams. Figure 8 As shown; S5. Insert fine-rolled threaded steel bars 4 into the through holes 3 of the block unit 2 of the relatively aligned three-layer arched beam, tension the fine-rolled threaded steel bars 4, and the block unit 2 of the three-layer arched beam forms an effective whole. S6. Remove the support frame to form a unified load-bearing structure, such as Figure 1 As shown.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A prefabricated arch structure, comprising an arch base (1), characterized in that: It also includes a multi-layered arch beam set on the arch base (1); the multi-layered arch beams are stacked vertically and tightly connected; the two ends of the arch beams are respectively fixed on the arch bases (1) on both sides, and the arch beams are an arch structure formed by splicing multiple UHPC prefabricated block units (2) together along the width direction and arc length direction of the arch beams.

2. The prefabricated arch structure as described in claim 1, characterized in that: The block unit (2) is a regular hexagonal block structure.

3. The prefabricated arch structure as described in claim 2, characterized in that: The side of the block unit (2) is tightly connected to the side of the adjacent block unit (2) by epoxy mortar.

4. A prefabricated arch structure as described in any one of claims 1 to 3, characterized in that: The joints of adjacent block units (2) on the same floor do not overlap with the joints of adjacent block units (2) on the same floor in the vertically adjacent layer in the vertical direction.

5. A prefabricated arch structure as described in claim 2, characterized in that: A fixed structure is provided between two adjacent vertical block units (2).

6. The prefabricated arch structure as described in claim 5, characterized in that: The fixing structure includes a screw; the screw passes vertically through the screw holes on the two adjacent block units (2) to fix the adjacent two block units (2) into one unit.

7. The prefabricated arch structure as described in claim 5, characterized in that: The fixed structure includes finely rolled threaded steel bars (4) that pass through holes (3) in all block units (2) along the arc length direction of the vertical arch beam.

8. A prefabricated arch structure as described in claim 6 or 7, characterized in that: The block unit (2) has multiple through holes (3), which are evenly spaced around the center of the regular hexagon of the block unit (2).

9. A prefabricated arch structure as described in claim 1, characterized in that: The central angles of the two adjacent arched beams are the same.

10. A prefabricated arch structure as described in claim 1, characterized in that: It also includes a support (5) between the two sets of arch foundations (1) that supports the block unit (2) during the assembly of the block unit (2).

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