ALC wallboard end precast construction column structure and construction method

Abstract

This invention provides a precast structural column structure and construction method for the ends of ALC wall panels, belonging to the technical field of precast structural columns. It includes symmetrical vertical columns and a horizontal column positioned between the two vertical columns. The top of the vertical columns has an upper pouring groove, and the two ends of the horizontal columns each have a support zone. In this invention, the support zones, the corresponding upper pouring grooves, and the bottom surface of the upper base together form a closed pouring cavity in the installed state. By pouring grout into the closed cavity to form a cast body, the horizontal columns, the symmetrical vertical columns, and the upper base are connected as a whole, constituting an integrated load-bearing structure. This significantly enhances the load-bearing capacity of key parts such as doorways, effectively improving the overall structure's crack resistance and impact resistance. Furthermore, no additional high-altitude formwork is required during construction; the top pouring connection can be completed in place with high connection strength, effectively reducing the construction difficulty of top pouring support, minimizing support procedures, and reducing construction risks.

Description

Technical Field

[0001] This invention relates to the field of precast structural column technology, specifically to a precast structural column structure and construction method at the end of an ALC wall panel. Background Technology

[0002] With the continuous development of industrialized building and prefabricated building technologies, ALC (autoclaved aerated concrete) wall panels are widely used in various construction projects due to their light weight, high standardization, high construction efficiency, and good thermal insulation performance. Common thicknesses of existing ALC wall panels are 100mm and 200mm. Their thinness significantly reduces the building's weight and improves construction efficiency, but it also brings potential quality hazards in critical areas. In areas with concentrated stress, such as openings and door jambs, ALC wall panels, due to their limited cross-sectional dimensions, are prone to cracks and edge damage under the influence of daily door closing vibrations and accidental external impacts. This not only affects the integrity of the wall's appearance but, in severe cases, can threaten the structural safety.

[0003] To address the aforementioned issues, existing technologies improve the overall structural strength by installing structural columns on the end faces of wall panels. Traditional structural column types mainly include cast-in-place concrete structural columns and steel structural columns. Among them, cast-in-place concrete structural columns have good integrity and load-bearing capacity, but require on-site formwork, rebar tying, and curing, resulting in a large amount of wet work, complex construction procedures, and a long construction period, making it difficult to fully utilize the efficiency advantages of prefabricated buildings. Although steel structural columns are easy to install and quick to construct, their cross-sectional stiffness and impact resistance are limited, and their ability to share loads is insufficient. Under large impact loads or long-term repeated loads, connections are prone to loosening, and overall durability and structural reliability remain insufficient.

[0004] To balance structural performance and construction efficiency, some existing technologies employ precast concrete structural columns. These columns are prefabricated in a factory and then assembled on-site. However, in practical applications, the structural performance of precast structural columns largely depends on the connection method between the column and the wall panel and substrate. Currently, the connection methods used in the assembly of structural columns mainly include wet connection (cast-in-place connection), dry connection (such as slotted or connector connection), and a combination of wet and dry methods. Wet connections offer better overall integrity and strong load-bearing capacity, but have lower construction efficiency; dry connections are convenient to construct, but have relatively lower connection strength and load-bearing reliability. Therefore, some existing technologies employ a combination of wet and dry methods to balance construction efficiency and structural performance.

[0005] For example, some existing technologies use connectors to fix the top of precast structural columns to structural beams / slabs, and grouting is performed in the connection groove at the bottom of the precast structural column to form a cast-in-place body, thus fixing its bottom to the floor slab surface. This solution uses a dry connection at the top, reducing high-altitude formwork work, lowering construction risks, and reducing the workload of wet connection methods.

[0006] However, while the above scheme takes into account both construction efficiency and structural performance to a certain extent, the precast structural columns are mainly connected by local points, and the stress strength of the top connection points is relatively weak. The overall coordinated stress-bearing capacity is limited, making it difficult to form a stable and reliable overall stress-bearing system in key parts such as doorways. The overall structural strength and impact resistance after installation still need to be further improved.

[0007] In summary, existing technologies still lack a structural column structure that can fully leverage the construction efficiency advantages of prefabricated components while forming a reliable overall load-bearing system in key areas such as doorways, thereby effectively improving the end crack resistance and impact resistance. Summary of the Invention

[0008] This invention provides a precast structural column structure at the end of an ALC wall panel, comprising symmetrically distributed vertical columns and horizontal columns positioned between two vertical columns. The bottom of each vertical column has a lower casting groove containing connecting bars. The opening of the lower casting groove is for pre-embedded bars from the lower base to pass through, forming a connection between the vertical column and the lower base through casting. The top of each vertical column has an upper casting groove, which is an open groove structure with its opening facing the horizontal column, and the opening is for pre-embedded bars from the upper base to pass through. Support zones are provided at both ends of the horizontal column. The horizontal column is longitudinally inserted between the symmetrical vertical columns, with both ends located within the corresponding upper casting grooves. This allows the support zones, the corresponding upper casting grooves, and the bottom surface of the upper base to collectively enclose a closed casting cavity in the installed state. Grouting is poured into the closed casting cavity to form a cast body, connecting the horizontal columns, the symmetrical vertical columns, and the upper base into a unified load-bearing structure.

[0009] In one possible implementation, the upper casting trough is a rectangular cross-section, a trough-shaped structure with three open sides, and the three open sides are the top surface, a longitudinal surface, and a transverse surface opposite to another vertical column. The support area includes a longitudinal support surface and a transverse support surface. The longitudinal support surface, the transverse support surface, the upper casting trough, and the bottom surface of the upper substrate together form a closed casting cavity in the installed state.

[0010] In one possible implementation, transverse reinforcement is provided on the support area, longitudinal reinforcement is provided in the upper casting groove, and pre-embedded reinforcement is provided on the upper base. The transverse reinforcement and longitudinal reinforcement are interlocked in the closed casting cavity, and the transverse reinforcement provided in the support areas at both ends of the transverse column is a single integral reinforcement.

[0011] In one possible implementation, the transverse columns are steel structures.

[0012] In one possible implementation, the transverse column is an angle steel structure, with rectangular connecting plates fixedly welded to both ends. The connecting plates and the end areas of the angle steel together form a support zone.

[0013] In one possible implementation, a reinforcing groove is provided on the bottom surface of the support area, and the cast body formed in the closed casting cavity forms a limiting protrusion that cooperates with it in the reinforcing groove.

[0014] In one possible implementation, the transverse column is further provided with a reverse limiting zone, which is embedded in the cast-in-place body and, under the limiting effect of the cast-in-place body, limits the transverse column in the longitudinal direction.

[0015] In one possible implementation, before the transverse column is installed, the longitudinal reinforcement is tied together with the corresponding pre-embedded reinforcement on the upper base, and the longitudinal reinforcement is inclined so that the transverse reinforcement and the longitudinal reinforcement form a compression fit during the installation of the transverse column.

[0016] A construction method for a precast structural column structure at the end of an ALC wall panel, based on such a structure, includes the following steps: S1: Assemble and fix symmetrical vertical columns to the wall panels on the corresponding sides; S2: Insert horizontal columns between the symmetrical vertical columns, so that the support area, the corresponding upper pouring groove, and the bottom surface of the upper substrate together enclose the upper closed pouring cavity; S3: Temporarily close the lower pouring groove at the bottom of the vertical column using a temporary support structure, so that the lower pouring groove, the top surface of the lower substrate, and the temporary support structure together enclose the lower closed pouring cavity; S4: Grout the upper closed pouring cavity and the lower closed pouring cavity respectively; S5: After the grout in the upper closed pouring cavity and the lower closed pouring cavity solidifies to form a poured body, remove the temporary support structure.

[0017] The above-mentioned one or more technical solutions in the embodiments of the present invention have the following technical effects: According to the embodiment of the present invention, an ALC wall panel end precast structural column structure and construction method are provided. By setting an upper pouring groove at the top of the vertical column and combining it with the support area at the end of the horizontal column, the support area, the corresponding upper pouring groove, and the bottom surface of the upper base together form a closed pouring cavity in the installed state. Grout is poured into the closed cavity to form a cast body, connecting the horizontal column, the symmetrical vertical column, and the upper base into a whole, constituting an integral load-bearing structure. Through the above structure and construction method, the load-bearing capacity of key parts such as door openings is significantly enhanced, effectively improving the crack resistance and impact resistance of the overall structure. At the same time, since the closed pouring cavity is formed by the horizontal and vertical columns themselves, no additional high-altitude formwork is required during construction, and the top cast-in-place connection can be completed. Furthermore, the connection strength is high, effectively reducing the construction difficulty of top pouring support, reducing support procedures, and reducing construction risks. Therefore, while significantly improving the overall structural load-bearing performance, this invention also takes into account construction efficiency and convenience, and is particularly suitable for engineering applications of key parts such as ALC wall panels and door openings in prefabricated buildings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the construction structure of a precast structural column at the end of an ALC wall panel provided in an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0020] Figure 3 This is a schematic diagram of the structure of a prefabricated structural column at the end of an ALC wall panel before the installation of the horizontal column, as provided in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of a prefabricated structural column at the end of an ALC wall panel after installation, according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the transverse column of a prefabricated structural column structure at the end of an ALC wall panel provided in an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the lower casting groove of a precast structural column structure at the end of an ALC wall panel provided in an embodiment of the present invention.

[0024] In the diagram: 1. Vertical column; 2. Connecting reinforcement; 3. Lower pouring trench; 4. Horizontal column; 5. Support zone; 6. Upper pouring trench; 7. Horizontal reinforcement; 8. Longitudinal reinforcement; 9. Connecting plate; 10. Reinforcement trench; 11. Reverse limiting zone; 100. Lower base; 200. Embedded reinforcement; 300. Upper base; 400. Wall panel; 500. Temporary support structure. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention 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 thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A precast structural column structure at the end of an ALC wall panel includes vertical column 1 and horizontal column 4, such as... Figure 1 As shown, the vertical columns 1 are symmetrically distributed on the left and right and are respectively assembled with the ends of the wall panels 400 on both sides of the doorway. The horizontal columns 4 are arranged between the symmetrical vertical columns 1. The top of the vertical columns 1 is provided with an upper pouring groove 6 and the bottom is provided with a lower pouring groove 3.

[0027] The horizontal column 4 is an angle steel structure, and rectangular connecting plates 9 are fixedly welded to its left and right ends (e.g., Figure 3 As shown), the left connecting plate 9 and part of its left transverse column 4 together form a rectangular cross-section support zone 5 (as shown). Figure 3 As shown), the right-side connecting plate 9 and the right-side transverse column 4 together form another rectangular cross-section support zone 5. The upper casting groove 6 is a rectangular cross-section, three-sided open groove structure (as shown). Figure 3 As shown), the slot faces the horizontal column 4.

[0028] The horizontal column 4 is inserted from front to back between the symmetrical vertical columns 1, with its left and right ends respectively inserted into the upper pouring groove 6 at the top of the corresponding vertical column 1. This allows the support area 5, the corresponding upper pouring groove 6, and the bottom surface of the upper base 300 to collectively form a closed pouring cavity in the installed state. Specifically: the left end face of the horizontal column 4 abuts against the corresponding side wall of the left upper pouring groove 6, the top surface of the corresponding connecting plate 9 abuts against the top surface of the left end of the horizontal column 4 on the bottom surface of the upper base 300, and the rear side of the connecting plate 9 abuts against the corresponding inner wall of the upper pouring groove 6. At this time, the left support area 5, the upper pouring groove 6 at the top of the left vertical column 1, and the bottom surface of the upper base 300 collectively form a closed pouring cavity; the same applies to the closed pouring cavity on the right side.

[0029] It should be noted that for dimensional deviations that occur during construction, installation or prefabrication, the dimensions can be adjusted by cutting or grinding the transverse column 4 on site, or by sealing before grouting the closed casting cavity, thereby ensuring the sealing and connection of the closed casting cavity has high construction adaptability and facilitates the smooth progress of on-site construction.

[0030] Afterwards, grout is injected into the casting cavity. After solidification, a casting body is formed, connecting the horizontal column 4, the symmetrical vertical column 1, and the upper base 300 into a whole, forming an integral load-bearing structure. This effectively improves the crack resistance and impact resistance of the overall structure, and eliminates the need for high-altitude support operations.

[0031] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The support zone 5 is equipped with transverse reinforcement 7 (arranged left and right), and the upper casting trench 6 is equipped with longitudinal reinforcement 8 (arranged front and back). The pre-embedded reinforcement 200 on the upper base 300 is vertically arranged. After the vertical column 1 is assembled, the longitudinal reinforcement 8 in the left upper casting trench 6 is first cross-tied with the corresponding pre-embedded reinforcement 200 on the upper base 300, and the longitudinal reinforcement 8 in the right upper casting trench 6 is also cross-tied with the corresponding pre-embedded reinforcement 200 on the upper base 300. Then, the transverse column 4 is installed so that the transverse reinforcement 7 in the left support zone 5 is cross-lapped with the longitudinal reinforcement 8 in the left upper casting trench 6, and the transverse reinforcement 7 in the right support zone 5 is cross-lapped with the longitudinal reinforcement 8 in the right upper casting trench 6. This forms a three-dimensional steel reinforcement skeleton in the corresponding closed casting cavity to enhance the connection strength of the cast body, thereby enhancing the overall load-bearing strength and reliability of the structure.

[0032] Among them, the longitudinal reinforcement 8 is set in a slightly inclined state, that is, the longitudinal reinforcement 8 is inclined from back to front and from top to bottom. During the installation of the transverse column 4, the transverse reinforcement 7 and the longitudinal reinforcement 8 form a compression fit, which improves the strength of the internal skeleton of the steel reinforcement to a certain extent, and thus helps to improve the strength of the cast body. In addition, the transverse reinforcement 7 set in the support area 5 at both ends of the transverse column 4 is a single integral reinforcement, which further improves the connection strength of the overall load-bearing structure.

[0033] See Figure 1 , Figure 2 and Figure 3 The transverse column 4 is also equipped with a reverse limiting zone 11, which is embedded in the cast-in-place body and, under the limiting effect of the cast-in-place body, limits the transverse column 4 longitudinally. Combined with... Figure 2 and Figure 3As shown, the reverse limiting area 11 is a limiting plate fixedly welded to the transverse column 4 and located in the corresponding casting cavity. After the casting body is formed, the limiting plate is just embedded in the casting body and forms a limiting point, which restricts the transverse column 4 from moving forward. This creates a mutually restrictive structural relationship between the transverse column 4 and the casting body, further enhancing the firmness and reliability of the connection between the transverse column 4, the symmetrical vertical column 1 and the upper base 300.

[0034] See Figure 3 and Figure 4 A reinforcing groove 10 is provided on the bottom surface of the transverse column 4. The reinforcing groove 10 is located in the support area 5. On the one hand, it allows the cast body to be directly connected to the bottom surface of the upper casting groove 6. On the other hand, a limiting protrusion is formed in the reinforcing groove 10 to limit the transverse column 4, further enhancing the firmness and reliability of the connection between the transverse column 4, the symmetrical vertical column 1 and the upper base 300.

[0035] See Figure 1 and Figure 6 The bottom of the vertical column 1 is provided with a lower pouring groove 3, and the lower pouring groove 3 is provided with connecting bars 2. The lower pouring groove 3 is also a rectangular cross-section, a groove-shaped structure with three open sides. After the vertical column 1 is installed, the vertically upward embedded bars 200 on the lower base 100 are located in the lower pouring groove 3 and overlap with the connecting bars 2 in the lower pouring groove 3. On site, the lower pouring groove 3 is temporarily closed by a simple temporary support structure 500, and then grout is poured to form a cast body, which stably connects the vertical column 1 and the lower base 100 together, ensuring the firmness and stability of the overall structure.

[0036] A construction method for precast structural columns at the ends of ALC wall panels includes the following steps: S1: Assemble and fix the symmetrical vertical columns 1 to the corresponding wall panels 400, as shown below. Figure 3 As shown, a tenon is provided on the end face of the wall panel 400, and a groove is provided on the vertical column 1. The vertical column 1 and the wall panel 400 are connected by the tenon and the groove, and the joint is filled and fixed with a special adhesive.

[0037] S2: Insert the horizontal column 4 between the symmetrical vertical columns 1 from front to back, so that the left end of the horizontal column 4 is located in the upper pouring groove 6 at the top of the left vertical column 1 and the right end is located in the upper pouring groove 6 at the top of the right vertical column 1, thus forming an upper closed pouring cavity. Then, insert a wedge-shaped wooden block or steel wedge between the end of the horizontal column 4 and the bottom surface of the corresponding upper pouring groove 6 to make the horizontal column 4 in a stable insertion state. Then, seal the joints of the horizontal column 4, the connecting plate 9, the bottom surface of the upper base 300, and the upper pouring groove 6. Polyurethane sealant can be used to seal the joints.

[0038] S3: The lower pouring trough 3 at the bottom of the vertical column 1 is temporarily closed by the temporary support structure 500, so that the lower pouring trough 3, the lower base 100 and the temporary support structure 500 together enclose the lower closed pouring cavity.

[0039] S4: Grouting is performed into both the upper and lower closed casting cavities. The upper closed casting cavity is constructed as follows: a lower grouting port (not shown in the diagram) and an upper vent (not shown in the diagram) are opened on the side of the end of the transverse column 4. C20 fine aggregate concrete or special grouting material is continuously injected into the upper casting cavity through the lower grouting port. When the grout overflows fully from the upper vent, it indicates that the cavity is completely filled and compacted without any obvious voids. The upper vent and lower grouting port are then sealed with pre-prepared special rubber plugs. After the grout has initially set, the rubber plugs are removed. The lower closed casting cavity is constructed using a conventional cast-in-place method.

[0040] S5: After the grout in the upper closed casting cavity and the lower closed casting cavity solidifies to form a casting body, remove the temporary support structure 500 of the lower casting trough 3 to complete the construction of the structural column structure.

[0041] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A precast structural column structure at the end of an ALC wall panel, characterized in that: It includes symmetrically distributed vertical columns and horizontal columns located between two vertical columns; The bottom of the vertical column is provided with a lower pouring groove, and the lower pouring groove is provided with connecting bars. The opening of the lower pouring groove is used for the pre-embedded bars on the lower base to pass through, so as to form a connection between the vertical column and the lower base through pouring. The top of the vertical column is provided with an upper pouring groove, which is an open groove structure with the groove opening facing the horizontal column, and the groove opening is for the pre-embedded reinforcement bars on the upper base to pass through. Support zones are provided at both ends of the horizontal column; the horizontal column is inserted longitudinally between symmetrical vertical columns and the two ends of the horizontal column are located in the corresponding upper pouring groove, so that the support zone, the corresponding upper pouring groove and the bottom surface of the upper base together enclose a closed pouring cavity in the installed state. Grouting is poured into the closed casting cavity to form a cast body, connecting the horizontal columns, symmetrical vertical columns, and upper base into a whole, forming an overall load-bearing structure.

2. The precast structural column structure at the end of an ALC wall panel according to claim 1, characterized in that: The upper pouring trough is a rectangular cross-section, a trough-shaped structure with three open sides. The three open sides are the top surface, a longitudinal surface, and a transverse surface opposite to another vertical column. The support area includes a longitudinal support surface and a transverse support surface. The longitudinal support surface, the transverse support surface, the upper pouring trough, and the bottom surface of the upper base together form a closed pouring cavity in the installed state.

3. A precast structural column structure at the end of an ALC wall panel according to claim 1 or 2, characterized in that: The support area is provided with transverse reinforcement bars, the upper casting groove is provided with longitudinal reinforcement bars, the pre-embedded reinforcement bars on the upper base are set vertically, the transverse reinforcement bars and longitudinal reinforcement bars are interlocked in the closed casting cavity, and the transverse reinforcement bars corresponding to the support areas at both ends of the transverse column are integrally formed whole reinforcement bars.

4. A precast structural column structure at the end of an ALC wall panel according to claim 1 or 2, characterized in that: The horizontal columns are steel structures.

5. The precast structural column structure at the end of an ALC wall panel according to claim 4, characterized in that: The transverse column is an angle steel structure, and rectangular connecting plates are fixedly welded to both ends. The connecting plates and the end areas of the angle steel together form the support area.

6. The precast structural column structure at the end of an ALC wall panel according to claim 5, characterized in that: A reinforcing groove is provided on the bottom surface of the support area, and the casting body formed in the closed casting cavity forms a limiting protrusion that matches it in the reinforcing groove.

7. A precast structural column structure at the end of an ALC wall panel according to claim 1 or 2, characterized in that: The transverse column is also provided with a reverse limiting zone, which is embedded in the cast-in-place body and limits the transverse column in the longitudinal direction under the limiting of the cast-in-place body.

8. The precast structural column structure at the end of an ALC wall panel according to claim 3, characterized in that: Before the horizontal column is installed, the longitudinal reinforcement is tied together with the corresponding pre-embedded reinforcement on the upper base, and the longitudinal reinforcement is set at an angle so that the horizontal reinforcement and the longitudinal reinforcement form a compression fit during the installation of the horizontal column.

9. A construction method for a precast structural column structure at the end of an ALC wall panel, based on the precast structural column structure at the end of an ALC wall panel as described in any one of claims 1-8, characterized in that: Includes the following steps: S1: Assemble and fix the symmetrical vertical columns to the wall panels on the corresponding sides respectively; S2: Insert the horizontal column between the symmetrical vertical columns so that the support area, the corresponding upper pouring groove and the bottom surface of the upper base together enclose the upper closed pouring cavity; S3: The lower pouring trough at the bottom of the vertical column is temporarily closed by a temporary support structure, so that the lower pouring trough, the top surface of the lower base and the temporary support structure together enclose the lower closed pouring cavity. S4: Grouting is performed into the upper closed casting cavity and the lower closed casting cavity respectively; S5: After the grout in the upper closed casting cavity and the lower closed casting cavity has solidified to form the casting body, the temporary support structure is removed.

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