Formwork-free constructional column and construction method thereof

Abstract

The invention provides a formwork-free constructional column and a construction method thereof.The formwork-free constructional column comprises a plurality of prefabricated hollow bricks arranged in a stacked mode from top to bottom, and every two adjacent prefabricated hollow bricks are spliced through rabbets to form a vertically-through cavity used for pouring constructional column concrete; the prefabricated hollow bricks comprise top-layer hollow bricks, middle-layer hollow bricks and bottom-layer hollow bricks, and the top-layer hollow bricks are provided with pouring openings used for pouring concrete. A cleaning opening is formed in the bottom hollow brick and used for cleaning the cavity; the middle hollow bricks are provided with connecting holes used for allowing tie bars to penetrate through so as to be connected with the masonry wall. The structure is simple, operation is convenient, the constructional column is formed by stacking the prefabricated hollow bricks in a wall building mode, constructional column formworks do not need to be additionally arranged, the construction technology is simplified, and the construction efficiency is improved; the prefabricated hollow brick is simple in manufacturing process and high in production efficiency, and the manufacturing cost is remarkably reduced; the overall structure is stable in connection and accurate in positioning, and the appearance quality of the constructional column is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of structural column construction, and in particular relates to a formwork-free structural column and a construction method thereof. Background Art

[0002] Structural columns are usually required during the construction of masonry structures. The existing construction method is to reserve positions for structural columns when building walls, first install structural column reinforcement, set up a structural column formwork system, then pour concrete into the formwork, and remove the formwork system after the concrete reaches the strength requirement. Although this method can form structural columns, the overall installation process is cumbersome, consuming a lot of materials and construction time. At the same time, due to the high difficulty in building the structural column formwork system, the formed structural columns are prone to common quality problems such as leakage, holes, and honeycombed surfaces, resulting in a large workload for later maintenance and repair, an increase in a large amount of manpower, and a serious impact on construction progress and production efficiency. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a formwork-free structural column and a construction method thereof, which simplifies the construction process, improves the construction efficiency, and ensures the appearance quality of the structural column.

[0004] The technical solution adopted by the present invention is: a formwork-free structural column, comprising a plurality of prefabricated hollow bricks stacked from top to bottom, wherein the upper and lower adjacent prefabricated hollow bricks are spliced ​​by tongue and groove to form a cavity that passes through from top to bottom; the prefabricated hollow bricks comprise a top hollow brick, a middle hollow brick and a bottom hollow brick, wherein the top hollow brick is provided with a pouring port for pouring concrete; the bottom hollow brick is provided with a cleaning port for cleaning the cavity; the middle hollow brick is provided with a connecting hole for passing tie bars to connect with the masonry wall.

[0005] Furthermore, a steel wire mesh is provided inside the side wall of the prefabricated hollow brick.

[0006] Furthermore, the middle hollow bricks include chamfered hollow bricks and standard hollow bricks that are alternately arranged; the cross-sectional shape of the chamfered hollow bricks is larger than that of the standard hollow bricks, forming a tooth-shaped structure.

[0007] Furthermore, the height of the chamfered hollow brick is greater than that of the standard hollow brick, and the sum of the heights of the chamfered hollow brick and the standard hollow brick is the same as the height of two layers of building blocks of the masonry wall; the top of the chamfered hollow brick is provided with a chamfered slope, which can be connected to the top pressure slope of the upper layer of the building block.

[0008] Furthermore, the chamfered surface is provided on the top of the bottom hollow brick.

[0009] Furthermore, the prefabricated hollow brick has an empty surface, and the side wall corresponding to the empty surface is provided with reinforcing rib holes, and the reinforcing rib holes of adjacent prefabricated hollow bricks are connected from top to bottom for passing reinforcing ribs.

[0010] Furthermore, the cleaning port and the pouring port are arranged on the free surface.

[0011] Furthermore, the prefabricated hollow bricks include U-shaped blocks arranged in pairs, and the U-shaped blocks are provided with matching tongues and grooves, and are connected by left and right splicing through the tongue and groove.

[0012] Furthermore, the outer surface of the prefabricated hollow bricks connected to the masonry wall is roughened.

[0013] A construction method for the formwork-free structural column as described above comprises the following steps:

[0014] Layout and design are performed according to the cross-sectional dimensions of the structural column to produce the prefabricated hollow bricks;

[0015] Install structural column reinforcement;

[0016] Install reinforcement ribs;

[0017] The prefabricated hollow bricks are installed from bottom to top, and after each layer of hollow bricks is installed, tie bars are inserted to tie with the masonry wall;

[0018] Cleaning impurities at the bottom of the prefabricated hollow brick through the cleaning port and blocking the cleaning port;

[0019] Pouring structural column concrete.

[0020] The advantages and positive effects of the present invention are:

[0021] (1) The present invention has a simple structure and is easy to operate. The structural column is formed by stacking prefabricated hollow bricks in a wall-building manner. The prefabricated hollow bricks serve as both a part of the structural column and a fixed formwork for pouring concrete for the structural column. There is no need to set up a separate structural column formwork, thereby eliminating the need for formwork erection and removal, simplifying the construction process and improving construction efficiency.

[0022] (2) Prefabricated hollow bricks are made of concrete in the factory, with simple manufacturing process and high production efficiency. They can be transported to the site for rapid installation. Compared with the on-site construction column formwork, the production cost is significantly reduced and the installation efficiency is improved.

[0023] (3) The overall structural connection is stable and the positioning is accurate, which avoids leakage of mortar at the connection between the upper and lower layers of prefabricated hollow bricks and improves the appearance quality of the structural column;

[0024] (4) By setting up the cleaning port, the bonding quality between the structural column concrete and the lower structure is ensured; and by setting up the tie bars, the integrity and seismic performance of the building structure are improved; the overall operation is simple and quick, which significantly improves the construction efficiency and molding quality of the structural column. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of structural column connection of a specific embodiment of the present invention;

[0026] Figure 2 It is a front view of a structural column of a specific embodiment of the present invention;

[0027] Figure 3 The present invention Figure 1 Schematic diagram of the aa section in FIG.

[0028] Figure 4 It is a schematic diagram of the bottom hollow brick structure of a specific embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of a standard hollow brick structure of a specific embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of a chamfered hollow brick structure according to a specific embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the top hollow brick structure of a specific embodiment of the present invention.

[0032] In the figure:

[0033] 1. Structural column; 11. Bottom hollow brick; 111. Cleaning port; 12. Middle hollow brick; 121. Chamfered hollow brick; 1211. Chamfered slope; 122. Standard hollow brick; 13. Top hollow brick; 131. Casting port; 14. Tongue and groove; 15. Connection hole; 16. Reinforcement hole; 2. Tie bar; 3. Reinforcement; 4. Masonry wall; 41. Block; 5. Structural column reinforcement; 6. Beam-slab structure. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0035] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top layer", "bottom layer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0036] The present invention provides a formwork-free structural column. The structural column 1 is formed by stacking prefabricated hollow bricks. The prefabricated hollow bricks serve as a part of the structural column 1 and also as a shaping formwork when pouring concrete for the structural column 1. There is no need to set up a separate formwork for the structural column 1, thereby eliminating the need for formwork erection and removal, simplifying the construction process, and improving construction efficiency; at the same time, the appearance quality of the structural column 1 is ensured.

[0037] like Figure 1-Figure 3 As shown, the present invention provides a formwork-free structural column 1, comprising a plurality of precast hollow bricks stacked from top to bottom, the precast hollow bricks are precast and processed in a factory according to the cross-sectional shape of the structural column 1, and the upper and lower adjacent precast hollow bricks are spliced ​​by tongue and groove 14 to form a cavity that runs through from top to bottom, which is used to pour concrete for the structural column 1; the precast hollow bricks include a top hollow brick 13, a middle hollow brick 12 and a bottom hollow brick 11, the top hollow brick 13 is provided with a pouring port 131 for pouring concrete; the bottom hollow brick 11 is provided with a cleaning port 111 for cleaning the cavity; the middle hollow brick 12 is provided with a connecting hole 15 for passing a tie bar 2 to connect with a masonry wall 4.

[0038] Generally, the concrete structural column 1 needs to be set up in situations where the masonry walls 4 are in a straight line, L-shaped or T-shaped intersection. The formwork-free structural column 1 of the present application can be constructed between masonry walls 4 with various cross-sectional forms. Figure 1 It shows a formwork-free structural column 1 arranged between T-shaped cross masonry walls 4, that is, one face of the structural column 1 is an open face, and the other three faces are respectively connected to the three masonry walls 4. At the same time, the structural column 1 is respectively connected to the three masonry walls 4 through tie bars 2.

[0039] The prefabricated hollow bricks in the present application are made by concrete shaping in the factory, with a simple manufacturing process and high production efficiency. They are transported to the site for rapid installation, which significantly reduces the production cost and improves the installation efficiency compared with the on-site construction column 1 template. The prefabricated hollow bricks are connected to form a whole by splicing with a tongue and groove 14. Only the bottom hollow brick 11 needs to be positioned to achieve the accurate position of the middle hollow brick 12 and the top hollow brick 13, and the formation of a through seam at the connection part of the upper and lower prefabricated hollow bricks can be effectively avoided, thereby preventing leakage and the like. At the same time, by setting the pouring port 131, the concrete of the structural column 1 can be poured from bottom to top, making the concrete pouring of the structural column 1 more compact and improving the strength of the structural column 1. By setting the cleaning port 111, the cavity is cleaned before pouring the concrete to ensure the bonding quality of the concrete of the structural column 1 and the lower structure. By setting the tie bar 2, the integrity and seismic performance of the building structure are improved. The overall operation is simple and fast, which significantly improves the construction efficiency and molding quality of the structural column 1.

[0040] In a preferred embodiment, a steel wire mesh is provided inside the side wall of the precast hollow brick along the height direction thereof. By providing the steel wire mesh, the crack resistance and strength of the precast hollow brick can be significantly improved.

[0041] like Figure 2-Figure 3 As shown, in a preferred embodiment, the middle hollow brick 12 includes chamfered hollow bricks 121 and standard hollow bricks 122 that are alternately arranged; the cross-sectional shape of the chamfered hollow brick 121 is larger than that of the standard hollow brick 122, forming a tooth-jointed structure, through which the integrity and stability between the structural column 1 and the masonry wall 4 can be significantly improved.

[0042] Typically, the blocks 41 of the masonry wall 4 and the structural column 1 are interlaced and pressed against each other to form a tooth-shaped joint structure. In the present application, the cross-sectional shape and height of the prefabricated hollow bricks constituting the structural column 1 match the blocks 41 on both sides of the structural column 1; in a specific embodiment, the height of the bottom hollow brick 11 is set to match the bottom structural height of the masonry wall 4, and the cross-sectional shape of the bottom hollow brick 11 is set to be the same as the cross-sectional shape of the chamfered hollow brick 121, and then the standard hollow bricks 122 and the chamfered hollow bricks 121 are alternately arranged and stacked upward, so that the prefabricated hollow bricks and the standard hollow bricks are stacked upward. The hollow bricks 122 are respectively connected with the blocks of the masonry wall 4 by staggered pressing; the cross-sectional shape of the top hollow brick 13 is set according to the middle hollow brick 12 below it. When the middle hollow brick 12 below it is a standard hollow brick 122, the cross-sectional shape of the top hollow brick 13 is constructed to be the same as the cross-sectional shape of the chamfered hollow brick 121; when the middle hollow brick 12 below it is a chamfered hollow brick, the cross-sectional shape of the top hollow brick 13 is constructed to be the same as the standard hollow brick 122; at the same time, the height of the top hollow brick 13 is set according to the distance between the top surface of the prefabricated hollow brick below it and the bottom surface of the beam-slab structure 6. Through the above technical solution, the tight connection between the prefabricated hollow bricks and the blocks of the masonry wall 4 is achieved, and the specifications of the prefabricated hollow bricks are solidified into at most four forms, which is more conducive to reducing the production cost and improving the production efficiency.

[0043] like Figure 2 , Figure 3 As shown, in a preferred embodiment, the height of the chamfered hollow brick 121 is greater than that of the standard hollow brick 122, and the sum of the heights of the chamfered hollow brick 121 and the standard hollow brick 122 is the same as the height of the two skins of building blocks 41 of the masonry wall 4; the top of the chamfered hollow brick 121 is provided with a chamfered inclined surface 1211, which can be connected with the top pressing inclined surface of the upper skin building block 41; the chamfered hollow brick 121 in this embodiment is also provided with a chamfered inclined surface 1211 at a corner of the upper skin building block 41 close to the structural column 1, and the other two chamfered inclined surfaces 1211 cooperate, so that the upper skin building block 41 does not It can not only press down the lower chamfered hollow bricks 121, but also limit the lower chamfered hollow bricks 121 in the horizontal direction, so as to lock the next batch of chamfered hollow bricks 121; during construction, the lower chamfered hollow bricks 121 can be constructed first and then the blocks 41 on one side of the structural column 1, or the blocks 41 around the structural column 1 can be constructed first, and the position of the structural column 1 can be reserved; by means of pressing down the inclined surface connection, it is convenient for construction personnel to judge whether the structural position of the subsequent construction is accurate according to the relative positions of the chamfered inclined surfaces 1211 of the two, so as to make adjustments at any time.

[0044] In a specific embodiment, a chamfered slope 1211 is also provided on the top of the bottom hollow brick 11 , and is connected to the top pressing slope of the upper epithelial building block 41 corresponding to the bottom hollow brick 11 , thereby improving the consistency and uniformity of the force-bearing performance of the structural column 1 .

[0045] Specifically, the number of chamfered slopes 1211 of the bottom hollow bricks 11 and the chamfered hollow bricks 121 matches the number of masonry walls 4 around the structural column 1; Figure 4 , Figure 6 As shown, when the structural column 1 is arranged between the T-shaped masonry walls 4, three faces of the structural column 1 are connected to the masonry walls 4, and chamfered slopes 1211 are provided on the three side walls corresponding to the bottom hollow bricks 11 and the chamfered hollow bricks 121; and the other face is the free face, and the side wall is straight up and down.

[0046] Furthermore, if Figure 5 As shown, the four side walls of the standard hollow brick 122 are all straight; the cross-sectional shape enclosed by the bottom hollow brick 11 and the top of the chamfered slope 1211 of the chamfered hollow brick 121 matches the cross-sectional shape of the standard hollow brick 122, and the chamfered slope 1211 and the upper part of the free surface are provided with a tongue and groove 14 that matches the bottom of the standard hollow brick 122, thereby achieving a tight connection with the standard hollow brick 122.

[0047] In the present application, the prefabricated hollow brick has an open face. To enhance the strength of the open face of the structural column 1, the side walls corresponding to the open face of all or part of the prefabricated hollow bricks are provided with reinforcing rib holes 16. The reinforcing rib holes 16 are arranged along the height direction. The reinforcing rib holes 16 of adjacent prefabricated hollow bricks are connected from top to bottom for passing reinforcing ribs 3. Preferably, the installation height of the reinforcing rib 3 is not less than two-thirds of the height of the structural column 1, and the depth of the reinforcing rib 3 is not less than 10 times the diameter of the reinforcing rib 3. Preferably, the open faces of the bottom hollow bricks 11 and the middle hollow bricks 12 are both provided with reinforcing rib holes 16.

[0048] In the above embodiment, the cleaning port 111 and the pouring port 131 are arranged on the free surface, so as to facilitate the operator to perform cleaning operations and connect the concrete pouring equipment through the pouring port 131 .

[0049] In a preferred embodiment, Figure 4-Figure 7 As shown, the prefabricated hollow bricks in the present application include U-shaped blocks arranged in pairs, the cross-sectional shape of the U-shaped blocks is U-shaped, and two U-shaped blocks are spliced ​​to form prefabricated hollow bricks with a square cross-sectional shape; the splicing surface of the U-shaped blocks is provided with matching tongues and grooves 14, and the tongues and grooves 14 are spliced ​​and connected left and right; during construction, one of the U-shaped blocks is first installed at the preset position of the structural column 1, and then the other U-shaped block is spliced ​​with the installed U-shaped block to complete the installation of the prefabricated hollow bricks of this layer; through this technical solution, it is more convenient for workers to install the prefabricated hollow bricks in the reserved gap, which reduces the difficulty of operation and is conducive to improving the positioning accuracy. Preferably, the cross-sectional shapes of the U-shaped blocks arranged in pairs are the same, which is not only convenient for production, but also can improve the consistency of the mechanical properties and stress state of the two U-shaped blocks.

[0050] Furthermore, the outer surface of the prefabricated hollow brick connected to the masonry wall 4 is roughened to ensure that the masonry mortar is tightly combined with the prefabricated hollow brick;

[0051] In a preferred embodiment, the connection hole 15 of the middle hollow brick 12 is arranged at the tongue and groove 14 , and the position of the connection hole 15 is precisely set according to the designed position of the tie bar 2 .

[0052] The second aspect of the present application proposes a construction method of a formwork-free structural column 1, comprising the following steps:

[0053] S1. Layout and design according to the cross-sectional dimensions of the structural column 1 to produce prefabricated hollow bricks;

[0054] First, layout is performed according to the cross-sectional dimensions of the structural column 1 to determine the cross-sectional specifications and heights of the bottom hollow bricks 11, the middle hollow bricks 12 and the top hollow bricks 13, thereby obtaining the processing parameters and quantities of prefabricated hollow bricks of different specifications for batch production in the factory.

[0055] In a specific embodiment, all prefabricated hollow bricks are prefabricated with concrete, the strength of the concrete is not less than C25, and the wall thickness of the prefabricated hollow bricks is not less than 20 mm; the top hollow bricks 13 and the chamfered hollow bricks 121 are provided with mortise and tenons on the top, and the bottom of the standard hollow bricks 122 are provided with matching tenons to form a tongue and groove 14 structure; the outer walls of the prefabricated hollow bricks except the air-facing surface are treated with a roughening process; the prefabricated hollow bricks after production are cured in the factory and reach the specified curing age before use.

[0056] S2, install structural column reinforcement 5;

[0057] According to the design drawings, the structural column reinforcement 5 is installed to the preset position and effectively connected with the upper and lower structures.

[0058] S3, install reinforcement rib 3;

[0059] When the structural column 1 has an open surface, the reinforcing rib 3 needs to be installed; when the structural column 1 does not have an open surface, the reinforcing rib 3 does not need to be installed.

[0060] S4, install prefabricated hollow bricks from bottom to top, and after each layer of hollow bricks 12 are installed, tie bars 2 are inserted to tie with the masonry wall 4;

[0061] In this embodiment, the construction of the structural column 1 and the masonry wall 4 connected thereto is completed layer by layer from top to bottom; specifically, the bottom hollow brick 11 is installed first, and when the reinforcing rib 3 is provided, the reinforcing rib hole 16 of the bottom hollow brick 11 is passed through the reinforcing rib 3; then the block 41 with the same skin as the bottom hollow brick 11 is constructed; then the standard hollow brick 122 is installed, and the block 41 with the same skin as the standard hollow brick 122 of this layer is constructed. During construction, the tie bar 2 is extended from the position of the block 41 to the direction of the standard hollow brick 122, passing through the connecting hole 15 of the standard hollow brick 122 or passing through the connecting hole 15 of the standard hollow brick 122 and then extending to the block 41 on the other side of the standard hollow brick 122; the same method is used to construct the upper layer of chamfered hollow bricks 121, the upper layer of blocks 41 and the tie bar 2; the above operation is repeated until all the middle hollow bricks 12 and the corresponding blocks 41 are fully constructed, and finally the top layer of hollow bricks 13 is installed.

[0062] After the prefabricated hollow bricks are installed, use a feeler gauge to check the installation gap between the prefabricated hollow bricks to ensure that the installation gap is no larger than 1mm.

[0063] S5, cleaning impurities at the bottom of the prefabricated hollow bricks through the cleaning port 111, and sealing the cleaning port 111;

[0064] Specifically, the impurities are mainly mortar and other materials dropped during the installation of prefabricated hollow bricks and the construction of blocks 41. If they are not removed, the connection quality between the concrete and the bottom structure will be affected. The impurities at the bottom are checked to ensure that they are completely cleaned, and then the cleaning port 111 is sealed.

[0065] S6, pouring concrete for structural column 1;

[0066] Specifically, the concrete pouring equipment is connected to the pouring port 131 , and the concrete is poured and vibrated to be dense during pouring. It is forbidden to use an iron hammer or other objects to hit violently to prevent damage to the prefabricated hollow bricks, thereby achieving precise control of the concrete forming of the structural column 1 .

[0067] The advantages and positive effects of the present invention are:

[0068] (1) The present invention has a simple structure and is easy to operate. The structural column is formed by stacking prefabricated hollow bricks in a wall-building manner. The prefabricated hollow bricks serve as both a part of the structural column and a fixed formwork for pouring concrete for the structural column. There is no need to set up a separate structural column formwork, thereby eliminating the need for formwork erection and removal, simplifying the construction process and improving construction efficiency.

[0069] (2) Prefabricated hollow bricks are made of concrete in the factory, with simple manufacturing process and high production efficiency. They can be transported to the site for rapid installation. Compared with the on-site construction column formwork, the production cost is significantly reduced and the installation efficiency is improved.

[0070] (3) The overall structural connection is stable and the positioning is accurate, which avoids leakage of mortar at the connection between the upper and lower layers of prefabricated hollow bricks and improves the appearance quality of the structural column;

[0071] (4) By setting up the cleaning port, the bonding quality between the structural column concrete and the lower structure is ensured; and by setting up the tie bars, the integrity and seismic performance of the building structure are improved; the overall operation is simple and quick, which significantly improves the construction efficiency and molding quality of the structural column.

[0072] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A formwork-free structural column, characterized in that: It comprises a plurality of prefabricated hollow bricks stacked from top to bottom, wherein the upper and lower adjacent prefabricated hollow bricks are spliced ​​by tongue and groove to form a cavity that passes through from top to bottom; the prefabricated hollow bricks comprise a top hollow brick, a middle hollow brick and a bottom hollow brick, wherein the top hollow brick is provided with a pouring port for pouring concrete; the bottom hollow brick is provided with a cleaning port for cleaning the cavity; the middle hollow brick is provided with a connecting hole for passing tie bars to connect with the masonry wall.

2. The formwork-free structural column according to claim 1, characterized in that: A steel wire mesh is arranged inside the side wall of the prefabricated hollow brick.

3. The formwork-free structural column according to claim 1 or 2, characterized in that: The middle hollow bricks include chamfered hollow bricks and standard hollow bricks that are alternately arranged; the cross-sectional shape of the chamfered hollow bricks is larger than that of the standard hollow bricks, forming a tooth-shaped structure.

4. The formwork-free structural column according to claim 3, characterized in that: The height of the chamfered hollow brick is greater than that of the standard hollow brick, and the sum of the heights of the chamfered hollow brick and the standard hollow brick is the same as the height of the two layers of building blocks of the masonry wall; the top of the chamfered hollow brick is provided with a chamfered slope, which can be connected to the top pressure slope of the upper layer of the building block.

5. The formwork-free structural column according to claim 4, characterized in that: The chamfered surface is arranged on the top of the bottom hollow brick.

6. The formwork-free structural column according to claim 1, 2, 4 or 5, characterized in that: The prefabricated hollow brick has an open surface, and the side wall corresponding to the open surface is provided with reinforcing rib holes. The reinforcing rib holes of adjacent prefabricated hollow bricks are connected vertically and are used for passing reinforcing ribs.

7. The formwork-free structural column according to claim 6, characterized in that: The cleaning port and the pouring port are arranged on the free surface.

8. The formwork-free structural column according to claim 7, characterized in that: The prefabricated hollow bricks include U-shaped blocks arranged in pairs, and the U-shaped blocks are provided with matching tongues and grooves, and are connected by left and right splicing through the tongue and groove.

9. The formwork-free structural column according to claim 8, characterized in that: The outer surface of the prefabricated hollow brick connected to the masonry wall is roughened.

10. The construction method of the formwork-free structural column according to any one of claims 1 to 9, characterized in that: The following steps are involved: Layout and design are performed according to the cross-sectional dimensions of the structural column to produce the prefabricated hollow bricks; Install structural column reinforcement; Install reinforcement ribs; The prefabricated hollow bricks are installed from bottom to top, and after each layer of hollow bricks is installed, tie bars are inserted to tie with the masonry wall; Cleaning impurities at the bottom of the prefabricated hollow brick through the cleaning port and blocking the cleaning port; Pouring structural column concrete.

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