An outer package type rigid joint column foot grouting formwork structure

Abstract

The utility model discloses an outer package type rigid joint column foot grouting formwork structure belongs to the steel reinforced concrete column construction technical field. The utility model discloses a structure includes column foot structure body, reinforcing base and grouting cavity, reinforcing base fixed mounting is in the upper surface of base, and column foot structure body sets up in reinforcing base top, and grouting cavity sets up between column foot structure body and reinforcing base. Grouting cavity is equipped with grouting hole and exhaust hole, and the upper mouth is freely connected with the column foot iron sheet of column foot structure body, and the lower mouth is firmly fixed with the side formwork support spare of reinforcing base upper setting. The structure provided by the utility model can guarantee secondary grouting compactness, thereby guaranteeing outer package type steel reinforced concrete construction quality, reducing secondary grouting formwork construction difficulty, avoiding material waste caused by grouting layer overfilling. Meanwhile, grouting layer formwork material can be made of construction site steel sheet iron sheet wood formwork etc. scrap, and the structure is economic and environmental protection, and construction is convenient, and time and energy are saved.

Description

Technical Field

[0001] This utility model belongs to the field of steel-concrete composite column construction technology, specifically relating to an externally enclosed rigid-joint column base grouting support structure. Background Technology

[0002] In the field of building construction, externally enclosed steel-concrete composite columns have become one of the core components in large-span, high-load building structures due to the high strength of steel structures and the high rigidity of concrete structures.

[0003] However, existing construction techniques for externally enclosed steel-concrete composite columns still face numerous unresolved technical challenges, severely hindering improvements in construction quality and efficiency. Firstly, precise positioning and installation are problematic. Anchor bolt pre-embedding is prone to deviations in position, elevation, and verticality. Furthermore, insufficient flatness of the foundation surface makes it difficult to hoist and position the steel column, and subsequent adjustments to elevation, verticality, and axial position cannot simultaneously meet multiple accuracy requirements. This can lead to initial stress in the steel column, creating structural safety hazards. Secondly, the quality of secondary grouting is a challenge. The grouting gap between the column base plate and the foundation top surface is typically only 50-100mm. This limited space severely restricts formwork support and grouting operations, easily leading to incomplete grouting and insufficient density. Additionally, improper cement-based grout mix design or inadequate post-curing can cause shrinkage deformation, resulting in detachment of the grout layer from the column base plate and foundation top surface. Thirdly, the construction of the outer concrete casing is difficult. The narrow space of the H-shaped steel column flange restricts the operation space for tying and inserting stirrups, increasing the difficulty of construction. In addition, if the concrete pouring is not in place in areas such as below the stiffening ribs of the steel column flange, around the studs, and in the stirrup-reinforced area, defects such as honeycomb and voids can easily form, weakening the load-bearing capacity of the structure.

[0004] Limited by confined working spaces, existing technologies lack effective measures that can balance the convenience of formwork erection with the density of grouting. To ensure the compactness of secondary grouting, common practices in on-site construction include using high-strength grouting materials to over-grout the grout layer, creating grouting holes in the foundation slab, and performing localized grouting on the foundation slab. However, these practices not only result in significant material waste but also increase construction time and labor costs. Therefore, an efficient solution to the grouting construction challenges of externally encased steel-concrete column bases is urgently needed. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology, ensure the compactness and effectiveness of secondary grouting, and provide an externally enclosed rigid column base grouting support structure.

[0006] The specific technical solution adopted in this utility model is as follows: This utility model provides an externally enclosed rigid column base grouting formwork structure, including a column base structure body, a reinforcing base and a grouting cavity. The reinforcing base is fixedly installed on the upper surface of the base, the column base structure body is disposed above the reinforcing base, and the grouting cavity is disposed between the column base structure body and the reinforcing base. The column base structure includes a steel column base, stiffening ribs, and a column base plate. The steel column base and stiffening ribs are both vertically fixed to the upper surface of the column base plate, and they are fixedly connected to the column base plate by a first fastener and an anchor column. The stiffening ribs are symmetrically arranged on both sides of the steel column base, and one end face of the stiffening rib is tightly fitted to the side wall of the steel column base, and the stiffening rib is fixedly connected to the steel column base. The reinforced base is composed of four base plates spliced ​​together. The side of each base plate abuts against the side of the adjacent base plate one by one, and the adjacent base plates are fixedly connected. Several side template supports are provided on the upper surface of each base plate, and the side template supports are vertically fixedly connected to the upper surface of the base plate. The grouting cavity is formed by enclosing and constructing side templates. The upper opening of the side templates is detachably and freely connected to the column base iron plate, and the lower opening is fixed by inserting the side template support. The grouting cavity is provided with a grouting hole on one side and an air vent on the other side.

[0007] Preferably, the steel column base is an H-shaped steel column.

[0008] Preferably, the first fastener is a nut.

[0009] Preferably, adjacent base plates are fixedly connected by a second fastener.

[0010] Preferably, the base plate has symmetrical grooves on its side, and the second fastener is engaged in the space formed by the splicing of the grooves of the adjacent base plates, so as to fasten the adjacent base plates together as a whole.

[0011] Preferably, two side template supports are provided on the upper surface of each base plate.

[0012] Preferably, the side formwork support is made of steel bars, the length of which is 50mm to 60mm and the spacing between two adjacent steel bars is 20mm.

[0013] Preferably, the outer wall of the side template is provided with wooden wedges or pads to prevent the side template from moving outward during grouting, and the wooden wedges or pads are fixedly installed on the reinforcing base.

[0014] Compared with the prior art, this utility model has the following advantages: This utility model provides an externally enclosed rigid column base grouting formwork structure. By improving the secondary grouting layer formwork construction, it ensures dense secondary grouting at the column base joint, guaranteeing the overall construction quality and structural load-bearing stability of the externally enclosed steel-concrete column. This also reduces the difficulty of secondary grouting formwork erection. Using this grouting formwork structure avoids the over-grouting process used in traditional construction to ensure density, thus preventing material waste and reducing material costs. Furthermore, the grouting layer formwork material can be directly processed from scraps of steel plates, sheet metal, and wooden formwork generated on-site, eliminating the need for additional specialized formwork materials. This achieves the recycling and reuse of construction waste and significantly reduces the procurement cost of formwork materials, making it economical and environmentally friendly. Moreover, the structure provided by this utility model has a simple and efficient installation process, is convenient to construct, and saves time and labor. Attached Figure Description

[0015] Figure 1 This is a front view of the external rigid column base grouting formwork structure provided in this embodiment; Figure 2 This is a rear view of the external rigid column base grouting formwork structure provided in this embodiment; Figure 3 This is a side view of the externally enclosed rigid column base grouting formwork structure provided in this embodiment; Figure 4 Top view of the reinforced base; Figure 5 Detailed drawing of the 1 / 4 structural node for reinforcing the base Figure 6 Schematic diagram for reinforcing the base and side template installation; In the diagram: 1. Steel column base; 2. Stiffening rib; 2-1. Anchor column; 3. Column base plate; 3-1. First fastener; 4. Base plate; 4-1. Second fastener; 4-2. Groove; 5. Side formwork support; 6. Side formwork; 6-1. Grouting hole; 6-2. Vent hole; 7. Base. Detailed Implementation

[0016] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "linking," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection or installation, a detachable connection or installation, or an integral connection or installation. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The terms "located in," "arranged," etc., indicate the sequential orientation based on the sequential orientation shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific sequential orientation, or be constructed and operated in a specific orientation. Terms such as "having," "comprising," and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof, and therefore should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features.

[0019] like Figure 1 and Figure 2 As shown in the figure, as a preferred embodiment of the present invention, this embodiment provides an externally enclosed rigid column base grouting formwork structure, including a column base structure body, a reinforcing base, and a grouting cavity. The reinforcing base is fixedly installed on the upper surface of the base 7, and the column base structure body is disposed above the reinforcing base. The two are arranged vertically and maintain a distance. The grouting cavity is disposed in the gap area between the column base structure body and the reinforcing base to accommodate secondary grouting material. The rigid connection between the column base structure body and the reinforcing base is achieved through the dense filling of the grouting material, thereby ensuring the overall force transmission stability and structural bearing performance of the externally enclosed rigid column base.

[0020] In the structure provided in this embodiment, the column base structure includes a steel column base 1, stiffening ribs 2, and a column base plate 3. Both the steel column base 1 and the stiffening ribs 2 are vertically fixed to the upper surface of the column base plate 3. In this embodiment, the steel column base 1 is an H-shaped steel column. One end of the anchor column 2-1 is deeply embedded inside the base 7, forming a stable anchoring foundation; the other end penetrates through the reinforcing base and the column base plate 3, extending into the internal installation position of the steel column base 1 and the stiffening ribs 2. Through coordinated locking with the first fastener 3-1 (in this embodiment, the first fastener 3-1 is a nut), the steel column base 1 and the stiffening ribs 2 are firmly fixed to the column base plate 3, ensuring the load-bearing reliability and structural stability of the connection nodes of each component, and effectively transmitting vertical loads and horizontal forces. The stiffening ribs 2 are symmetrically arranged on both sides of the steel column base 1, with the end face of the stiffening rib 2 closest to the steel column base 1 tightly fitted and fixedly connected to the side wall of the steel column base 1. To further enhance connection reliability and structural integrity, the stiffening ribs 2 and the steel column base 1 can be stably connected by welding or high-strength fasteners. The symmetrically arranged stiffening ribs 2 can effectively disperse the vertical load and horizontal force borne by the steel column base 1, thereby improving the shear strength, bending stiffness and lateral displacement resistance of the column base structure.

[0021] like Figure 2 and Figure 3 As shown, the grouting cavity is formed by several side formwork panels 6. The upper opening of the side formwork panels 6 is detachably connected to the column base plate 3, facilitating installation and disassembly while ensuring a tight seal at the connection point through a snug fit design. In this embodiment, the side formwork panels 6 can be made from steel plates or scrap wood from the construction site, eliminating the need for additional procurement of specialized formwork materials, thus maximizing material savings and reducing construction costs. Figure 6 As shown, the lower end is inserted into the side formwork support 5 for fixation, ensuring that the side formwork 6 is not easily displaced or deformed during grouting. To ensure the compactness of the grout layer, a grouting hole 6-1 is provided on one side wall of the grouting cavity, and a corresponding vent hole 6-2 is provided on the opposite side wall. The grout is continuously injected at a low speed through the grouting hole 6-1 on one side. As the grout advances, it squeezes air out of the vent hole 6-2 on the other side until uniform grout flows out of the vent hole 6-2 without air bubbles. Then, the vent hole 6-2 is sealed, and finally the grouting hole 6-1 is sealed. The vent hole 6-2 is generally designed at the top of the grouting cavity to ensure that the air trapped in the cavity is discharged in time during the grouting process, avoiding quality defects such as air holes and voids caused by residual air. This ensures that the grout can fully fill the cavity and form a dense and uniform grout layer.

[0022] like Figure 4 and Figure 5As shown, the reinforced base is composed of four trapezoidal base plates 4 spliced ​​together. The sides of each base plate 4 correspond to the sides of adjacent base plates 4, ensuring a seamless fit between the spliced ​​surfaces. In this embodiment, the base plate 4 is a trapezoidal steel plate. In other embodiments, the base plate 4 can be made of different shapes and materials depending on the actual construction scenario. The sides of the base plates 4 are symmetrically provided with grooves 4-2. When two adjacent base plates 4 are spliced ​​together, the grooves 4-2 on the sides of the adjacent base plates 4 are arranged opposite each other and enclose a closed accommodating space. The second fastener 4-1 is engaged within the space formed by the splicing of the grooves 4-2 of the adjacent base plates 4, firmly connecting the adjacent base plates 4 into a single unit. In this embodiment, the second fastener 4-1 is made of high-strength steel bars, bent into a π-shaped structure. This structure allows both ends of the second fastener 4-1 to be engaged into the grooves 4-2 of the adjacent base plates 4, forming a bidirectional limiting and fixing mechanism. The length of the second fastener 4-1 is determined based on the actual spacing parameters of the space formed by the grooves 4-2 after the adjacent base plates 4 are spliced ​​together. This ensures that the second fastener 4-1 and the grooves 4-2 form a tight interlocking fit, preventing displacement of the base plates 4 after splicing, and further ensuring the structural stability and load-bearing reliability of the reinforced base. In other embodiments, the splicing form of the base plates 4 is not limited, and a groove and tongue-and-groove fastening connection can also be used. By pre-setting suitable grooves and tongue-and-groove structures on the splicing surfaces of the components, the grooves and tongue-and-groove of adjacent components can be interlocked and fastened to form a gapless interlocking connection.

[0023] like Figure 4 and Figure 6 As shown, each base plate 4 has several side formwork supports 5 on its upper surface, which are vertically and fixedly connected to the upper surface of the base plate 4. In the device provided in this embodiment, two side formwork supports 5 are provided, and the side formwork supports 5 are made of steel bars with a length of 50mm to 60mm. The steel bars can be fixedly connected to the base plate 4 by welding or integral molding, and the spacing between two adjacent steel bars is 20mm. In other embodiments, the number of side formwork supports 5 on each base plate 4 and the spacing between two adjacent side formwork supports 5 can be increased or decreased according to the actual construction situation to ensure the verticality and stability of the side formwork 6 after installation and to avoid tilting or displacement of the formwork during grouting. After the side formwork 6 is inserted into the side formwork support 5, in order to prevent the lateral pressure generated by the grouting material on the side formwork 6 during the grouting process from causing the side formwork 6 to move outward, deform or shift, the outer wall of the side formwork 6 is provided with wooden wedges or pads to prevent the side formwork 6 from moving outward during grouting. The wooden wedges or pads are fixedly installed on the reinforcing base to form a stable lateral support structure, further ensuring that the grouting material can densely fill the cavity and form a grouting layer with complete structure and stable performance.

[0024] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. An externally enclosed rigid-joint column base grouting formwork structure, characterized in that, It includes a column base structure body, a reinforcing base and a grouting cavity. The reinforcing base is fixedly installed on the upper surface of the base (7), the column base structure body is located above the reinforcing base, and the grouting cavity is located between the column base structure body and the reinforcing base. The column base structure includes a steel column base (1), a stiffening rib (2), and a column base iron plate (3). The steel column base (1) and the stiffening rib (2) are both vertically fixed on the upper surface of the column base iron plate (3), and the two are fixedly connected to the column base iron plate (3) by the first fastener (3-1) and the anchor column (2-1). The stiffening rib (2) is symmetrically arranged on both sides of the steel column base (1). One end face of the stiffening rib (2) is tightly fitted to the side wall of the steel column base (1), and the stiffening rib (2) is fixedly connected to the steel column base (1). The reinforced base is composed of four base plates (4) spliced ​​together. The side of each base plate (4) abuts against the side of the adjacent base plate (4) one by one, and the adjacent base plates (4) are fixedly connected. Several side template supports (5) are provided on the upper surface of each base plate (4), and the side template supports (5) are vertically fixedly connected to the upper surface of the base plate (4). The grouting cavity is formed by enclosing and constructing a side template (6). The upper opening of the side template (6) is detachably and freely connected to the column base iron plate (3), and the lower opening is inserted into the side template support (5) for fixation. A grouting hole (6-1) is provided on one side of the grouting cavity, and an exhaust hole (6-2) is provided on the other side.

2. The externally enclosed rigid column base grouting formwork structure according to claim 1, characterized in that, The steel column base (1) is an H-shaped steel column.

3. The externally enclosed rigid column base grouting formwork structure according to claim 1, characterized in that, The first fastener (3-1) is a nut.

4. The externally enclosed rigid column base grouting formwork structure according to claim 1, characterized in that, The adjacent base plates (4) are fixedly connected by a second fastener (4-1).

5. The externally enclosed rigid column base grouting formwork structure according to claim 1, characterized in that, The base plate (4) has symmetrical grooves (4-2) on its side. The second fastener (4-1) is engaged in the space formed by splicing the grooves (4-2) of the adjacent base plates (4) to fasten the adjacent base plates (4) into one unit.

6. The externally enclosed rigid column base grouting formwork structure according to claim 1, characterized in that, Two side template supports (5) are provided on the upper surface of each base plate (4).

7. The externally enclosed rigid column base grouting formwork structure according to claim 6, characterized in that, The side formwork support (5) is made of steel bars, the length of which is 50mm~60mm and the spacing between two adjacent steel bars is 20mm.

8. The externally enclosed rigid column base grouting formwork structure according to claim 1, characterized in that, The outer wall of the side template (6) is provided with wooden wedges or pads to prevent the side template (6) from moving outward during grouting. The wooden wedges or pads are fixedly installed on the reinforcing base.

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