Fabricated square corrugated steel-concrete composite column and construction method

Abstract

The invention provides an assembly type square corrugated steel-concrete combination column and a construction method, the assembly type square corrugated steel-concrete combination column comprises a square corrugated steel plate assembly, the square corrugated steel plate assembly comprises multiple sections of assembly units which are sequentially arranged from top to bottom, and each assembly unit comprises four corrugated steel plate components; each corrugated steel plate component comprises a corrugated steel plate, grouting corner fittings welded to the left side and the right side of the corrugated steel plate, square steel assemblies welded to the upper end and the lower end of the corrugated steel plate, and connecting insertion plates used for connecting the grouting corner fittings of every two adjacent corrugated steel plate components. The grouting corner fittings are provided with connecting flat plate parts, the connecting inserting plate is connected with the connecting flat plate parts of the two grouting corner fittings in an inserting mode, and at the moment, the connecting flat plate parts of the two grouting corner fittings are attached and aligned to form a complete attaching face; the square steel assembly comprises a square steel piece and an n-shaped plate piece which can be matched with each other in an inserted mode and can prevent vertical separation. The problems that site construction of an existing corrugated side plate-square steel tube concrete column is complex, welding quality is difficult to control, segmented connection is not reliable, and construction efficiency is low are solved.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a prefabricated square corrugated steel-concrete composite column and its construction method. Background Technology

[0002] In the field of building construction, steel plate-concrete composite column structures, with their synergistic stress-bearing advantages of steel and concrete, have become core components for improving the load-bearing capacity, stability, and seismic performance of structures, and are widely used in important projects such as high-rise buildings, large-span factories, and bridge piers.

[0003] Corrugated side plate-square steel tube concrete column is an improved composite column form. It is typically constructed by welding corrugated steel plates to form a square steel tube shell, into which concrete is then poured. The corrugated side plates provide lateral restraint, limiting the lateral deformation of the concrete and significantly improving its compressive strength and ductility. Simultaneously, the concrete filling the square steel tube effectively prevents local buckling of the corrugated side plates, fully utilizing the tensile and shear strength advantages of steel. The synergistic effect of both components optimizes the structural load-bearing performance.

[0004] However, existing corrugated side plate-square steel tube concrete columns still have some technical shortcomings in practical applications. Firstly, regarding component processing and construction, the outer shell of the square steel tubes in existing corrugated side plate-square steel tube concrete columns often requires on-site cutting, splicing, and welding of the corrugated steel plates. On-site construction procedures are complex and labor-intensive, and are affected by weather conditions and differences in the skill level of on-site construction personnel, making it difficult to guarantee welding quality. Defects such as loose welds and cracks are prone to occur, affecting not only the structural safety of the column but also leading to low construction efficiency, failing to meet the demands of rapid industrialized construction. Secondly, regarding connection node design, when the column needs to be constructed in sections, existing corrugated side plate-square steel tube concrete columns often use flange connections or on-site welding for segmental connections. Flange connections are costly and cumbersome to construct, while on-site welding faces the same quality control challenges as welding integral square steel tubes. Summary of the Invention

[0005] The purpose of this invention is to provide a prefabricated square corrugated steel-concrete composite column and a construction method to improve the problems of complicated on-site construction procedures, difficulty in welding quality control, insufficient reliability of segmented connections, and low construction efficiency of existing corrugated side plate-square steel tube concrete columns.

[0006] This invention is implemented as follows:

[0007] According to a first aspect of the present invention, the present invention provides a prefabricated square corrugated steel-concrete composite column, comprising a square corrugated steel plate assembly and a first filling concrete and a second filling concrete poured into the square corrugated steel plate assembly. The square corrugated steel plate assembly comprises multiple component units arranged sequentially from top to bottom. The first filling concrete and the second filling concrete each comprise concrete segments cast in sections corresponding to the multiple component units. Each component unit comprises four corrugated steel plate members, each corrugated steel plate member comprising a corrugated steel plate and grouting corners welded to the left and right sides of the corrugated steel plate. The components include square steel assemblies welded to the upper and lower ends of corrugated steel plates, and connecting inserts for grouting corner pieces connecting adjacent corrugated steel plate components; each grouting corner piece has a connecting plate portion, and the connecting insert is inserted into and connected to the connecting plate portions of two grouting corner pieces, at which time the connecting plate portions of the two grouting corner pieces are fitted and aligned to form a complete mating surface; each square steel assembly includes square steel pieces that can be inserted and fitted together and prevent separation between the upper and lower parts; the first filling concrete is filled into each grouting corner piece, and the second filling concrete is filled into a square cavity formed by the enclosing of multiple component units.

[0008] Furthermore, the cross-section of the grouting corner piece is an isosceles right triangle, the corrugated steel plate is connected to the right-angled side of the grouting corner piece, and the hypotenuse of the grouting corner piece is a connecting plate portion.

[0009] Furthermore, the grouting corner piece has a through-hole extending vertically on its inclined side. The connecting plate has an I-shaped cross-section and includes a wing plate and a web plate. The thickness of the web plate is the same as the width of the through-hole, and the width of the web plate is the same as the total thickness of the connecting plate portion of the two grouting corner pieces that fit together.

[0010] Furthermore, the outer wall dimensions of the square steel member are adapted to the internal cavity dimensions of the n-shaped plate. An anti-retraction strip is provided on the inner side of the opening of the internal cavity of the n-shaped plate. Both the anti-retraction strip and the insertion end of the square steel member are provided with chamfered portions to facilitate the insertion of the square steel member into the internal cavity of the n-shaped plate.

[0011] Furthermore, the outer wall dimensions of the square steel component are adapted to the internal cavity dimensions of the n-shaped plate. The square steel component includes a square steel and multiple elastic locking post assemblies, each elastic locking post assembly being arranged sequentially along the length of the square steel. Each elastic locking post assembly includes a locking post, a mounting base, and a spring. The spring is horizontally positioned between the locking post and the mounting base. The side wall of the square steel component is provided with guide holes corresponding to the locking posts of each elastic locking post assembly. The locking post passes through the guide holes, and the locking post is provided with a limiting structure to prevent the locking post from completely passing through the guide holes. One side wall of the n-shaped plate is provided with locking holes corresponding to the locking posts of each elastic locking post assembly. When the square steel component is inserted into the internal cavity of the n-shaped plate to a preset position, the locking post extends out of the guide holes and inserts into the corresponding locking holes under the elastic thrust of the spring, forming an anti-disengagement locking mechanism.

[0012] Furthermore, the spring is located in the square steel, and the mounting base is installed on the other side wall of the square steel without the guide through hole. The opposite end faces of the mounting base and the locking post are provided with positioning structures adapted to the spring. The positioning structure is a positioning protrusion or a positioning groove. The limiting structure is an anti-disengagement screw threaded on the locking post.

[0013] Furthermore, the guide through hole is adapted to the cross-sectional dimensions of the locking post, and the guide through hole is a non-cylindrical through hole. The outer end of the locking post is provided with an inclined surface, and the inclined direction of the inclined surface is consistent with the direction of the square steel piece inserted into the n-shaped plate. This is used to form a guiding squeeze with the cavity port of the n-shaped plate during the insertion process, so that the locking post automatically compresses the spring and retracts into the guide through hole when the square steel piece and the n-shaped plate are inserted and connected.

[0014] Furthermore, the corrugated steel plate component also includes a guide plug plate for guiding the grouting corner pieces of two adjacent component units. One end of the guide plug plate is fixed to the lower opening of the grouting corner piece of the upper component unit, and the other end can be inserted into the upper opening of the grouting corner piece of the lower component unit. At this time, the outer wall of the guide plug plate is in contact with at least two adjacent inner walls of the grouting corner piece.

[0015] According to a second aspect of the present invention, the present invention provides a construction method for a prefabricated square corrugated steel-concrete composite column, for use in the above-mentioned prefabricated square corrugated steel-concrete composite column, comprising the following steps:

[0016] S100, Factory prefabrication: Preparation of corrugated steel plate components;

[0017] S200, First section of component unit assembly: The four corrugated steel plate components are hoisted to the construction site and connected into a complete component unit through four connecting plates;

[0018] S300, First section of component unit concrete construction: First, insert temporary positioning pieces with the same structure and size as the guide plug plate into the upper end of each grouting corner piece of the first section of component unit. The insertion depth is consistent with the design insertion depth of the guide plug plate of the subsequent second section of component unit. Then, pour the first filling concrete into the internal cavity of each grouting corner piece of the first section of component unit. After curing to more than 70% of the design strength, pull out the temporary positioning pieces. Then, pour the second filling concrete into the square cavity enclosed by the first section of component unit.

[0019] S400, Second Section Component Unit Lifting and Docking: Lift each corrugated steel plate component of the second section component unit to directly above the first section component unit, align the guide plug plate at the lower end of the grouting corner piece of the second section component unit with the upper opening of the grouting corner piece of the first section component unit, and slowly insert it along the reserved insertion slot of the temporary positioning piece to achieve precise alignment of the upper and lower component units. At the same time, align the square steel piece or n-shaped plate piece of the second section component unit with the n-shaped plate piece or square steel piece of the first section component unit, and complete the vertical fixation through the anti-detachment cooperation structure of the two.

[0020] S500, Second Segment Component Unit Concrete Construction: Repeat step S300. First, insert temporary positioning pieces with the same structure and size as the guide plug plate into the upper end of each grouting corner piece of the second segment component unit. The insertion depth is consistent with the design insertion depth of the guide plug plate of the subsequent segment component unit. Then, pour the first filling concrete into the internal cavity of each grouting corner piece of the second segment component unit. After curing to more than 70% of the design strength, pull out the temporary positioning pieces. Then, pour the second filling concrete into the square cavity enclosed by the second segment component unit.

[0021] S600, Multi-segment Repeated Construction: Repeat steps S400-S500, and complete the installation of subsequent component units and concrete construction in sequence.

[0022] Furthermore, the first filling concrete uses early-strength grouting material, which is injected at a uniform speed through the grouting funnel along the upper opening of the grouting corner piece during grouting to ensure that there are no air bubbles or voids inside the cavity; before pouring the second filling concrete, longitudinal steel bars and stirrups can be inserted into the square cavity according to the design requirements and tied into shape. During the pouring process, an immersion vibrator is used to vibrate in layers, with each layer vibrating to a depth of no more than 500mm, until the concrete surface is covered with slurry and there is no obvious settlement, so as to ensure the density of the concrete and the integrity of the structure.

[0023] It also includes step S700, overall curing and molding: After all concrete construction is completed, the composite column is covered and moisturized. The curing cycle is adjusted according to the ambient temperature to ensure that both the first and second filling concrete reach the design strength, thus completing the construction of the composite column.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention, by setting up prefabricated square corrugated steel plate components, segmented component units and matching plug-in connection structures, adopts a factory prefabrication and on-site plug-in assembly mode, eliminating the need for a large amount of on-site welding. Combined with the double-filled concrete design, it solves the problems of complicated on-site construction, difficulty in controlling welding quality, unreliable segmented connection and low construction efficiency of existing corrugated side plate-square steel tube concrete columns. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the prefabricated square corrugated steel-concrete composite column provided by the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the prefabricated square corrugated steel-concrete composite column provided by the present invention when the first and second filling concretes are removed.

[0027] Figure 3 This is a schematic diagram of the connection between the connecting plate and the two grouting corner pieces of the present invention;

[0028] Figure 4 This is a schematic diagram of the connection structure of the square steel components, grouting corner pieces, and guide plug-in plates of the upper and lower component units in Embodiment 1 of the present invention.

[0029] Figure 5 yes Figure 4 Enlarged view of region A in the middle;

[0030] Figure 6 This is a schematic diagram of the connection structure of the square steel components, grouting corner pieces, and guide plug-in plates of the upper and lower component units in Embodiment 2 of the present invention.

[0031] Figure 7 yes Figure 6 Enlarged view of region B in the middle;

[0032] Figure 8 This is a schematic diagram of the structure when the square steel piece and the n-shaped plate piece are connected together in Embodiment 2 of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure of the square steel component in Embodiment 2 of the present invention, showing the connection between the locking post, the mounting base, and the spring.

[0034] In the diagram: 1. Square corrugated steel plate assembly; 11. Corrugated steel plate component; 111. Corrugated steel plate; 112. Grouting corner piece; 113. Square steel piece; 1131. Locking post; 11311. Inclined surface; 1132. Mounting base; 1133. Spring; 1134. Limiting structure; 114. N-shaped plate; 1141. Anti-reverse strip; 1142. Locking hole; 115. Connecting insert plate; 116. Guide insert plate; 2. First filling concrete; 3. Second filling concrete. Detailed Implementation

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction 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.

[0036] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0037] Example 1

[0038] like Figure 1 and Figure 2 As shown, this embodiment provides a prefabricated square corrugated steel-concrete composite column, mainly composed of a square corrugated steel plate assembly 1 and a first filling concrete 2 and a second filling concrete 3 poured inside the square corrugated steel plate assembly 1. The square corrugated steel plate assembly 1 serves as the outer enclosure and load-bearing skeleton of the composite column, employing a segmented prefabricated structural design. Multiple structurally identical component units are arranged sequentially from top to bottom. Each component unit consists of four corrugated steel plate members 11 of identical specifications, which are joined together to form a square structure. The four corrugated steel plate members 11 correspond to the four sides of the square, and are spliced ​​together to form a complete component unit.

[0039] like Figures 1-5 As shown, each corrugated steel plate component 11 is prefabricated in a factory. Its structure includes a corrugated steel plate 111, grouting corner pieces 112, square steel components, and connecting plates 115. The corrugated steel plate 111 serves as the main load-bearing plate of the component, employing a corrugated structure design to enhance its bending and shear resistance, meeting the load-bearing requirements of the composite column. The grouting corner pieces 112 are welded to the left and right sides of the corrugated steel plate 111 to achieve lateral connection between adjacent corrugated steel plate components 11, and can be filled with concrete to enhance the strength of the connection. The square steel components are welded to the upper and lower ends of the corrugated steel plate 111 to achieve vertical connection between adjacent upper and lower component units, and have an anti-detachment function to ensure the stability of the vertical connection. The connecting plates 115 are used in conjunction with the grouting corner pieces 112 to achieve precise docking and fixation of adjacent corrugated steel plate components 11.

[0040] like Figures 3-5As shown, the cross-section of the grouting corner piece 112 is designed as an isosceles right triangle. A grouting corner piece 112 is welded to each side of a corrugated steel plate 111, and the corrugated steel plate 111 is connected to the right-angled side of the grouting corner piece 112. To achieve the lateral splicing of two adjacent corrugated steel plate components 11, a through-hole is provided on the inclined side (i.e., the connecting plate portion) of the grouting corner piece 112. The cross-section of the connecting plate 115 is I-shaped, including a wing plate and a web plate. The thickness of the web plate is adapted to the width of the through-hole on the grouting corner piece 112 to ensure that the web plate can be smoothly inserted into the through-hole. The width of the web plate is the same as the total thickness of the connecting plate portions of the grouting corner pieces 112 of the two adjacent corrugated steel plate components 11 after they are fitted together. When the two adjacent corrugated steel plate components 11 are joined together, the connecting plate portions of the two grouting corner pieces 112 will be completely fitted and aligned to form a complete mating surface. At this time, the web plate of the connecting plate 115 is inserted into the corresponding through-hole of the two grouting corner pieces 112, and the wing plate is fitted onto the inner surface of the connecting plate portion to achieve the positioning and fixing of the two corrugated steel plate components 11.

[0041] like Figure 4 and Figure 5 As shown, the square steel component serves as the vertical connection structure between the upper and lower component units. It includes a square steel piece 113 and an n-shaped plate 114 that can be plugged into each other. The dimensions of the two are precisely matched and designed. The outer wall dimensions of the square steel piece 113 are perfectly matched with the internal cavity dimensions of the n-shaped plate 114, ensuring that the square steel piece 113 can be smoothly inserted into the internal cavity of the n-shaped plate 114, thereby achieving vertical docking of the upper and lower component units. To prevent the square steel component 113 from detaching from the n-shaped plate 114 after insertion and to ensure the stability of the vertical connection, a retaining strip 1141 is provided inside the opening of the internal cavity of the n-shaped plate 114. At the same time, a chamfer is provided on both the retaining strip 1141 and the insertion end of the square steel component 113. The chamfer adopts an inclined surface design, which can guide the square steel component 113 during the insertion of the n-shaped plate 114, so that the square steel component 113 can be inserted into the n-shaped plate 114 more smoothly. After insertion, the retaining strip 1141 blocks the lower side of the square steel component 113, forming an anti-detachment limit to prevent the upper and lower component units from detaching.

[0042] In addition, such as Figure 5As shown, the corrugated steel plate component 11 also includes a guide insertion plate 116. This guide insertion plate 116 is used to assist in guiding and connecting the grouting corner pieces 112 of two adjacent upper and lower component units, improving the accuracy of splicing the upper and lower component units. One end of the guide insertion plate 116 is fixedly welded to the lower opening of the grouting corner piece 112 of the upper component unit, and the other end can be inserted into the upper opening of the grouting corner piece 112 of the lower component unit. The outer wall of the guide insertion plate 116 is in close contact with at least two adjacent inner walls of the grouting corner piece 112. Through the guiding effect of the contact surface, the upper and lower component units can be quickly and accurately aligned, reducing splicing deviation and improving construction efficiency.

[0043] During the concrete pouring process, the first filling concrete 2 and the second filling concrete 3 are filled in different locations. The first filling concrete 2 fills the internal cavity of each grouting corner member 112 to enhance the strength of the grouting corner member 112 and the integrity of the connection, preventing deformation or damage to the grouting corner member 112 under stress. The second filling concrete 3 fills the square cavity formed by the enclosed multi-segment component units, serving as the main load-bearing structure of the composite column. It works in conjunction with the square corrugated steel plate component 1 to improve the overall load-bearing capacity and deformation resistance of the composite column, ensuring that the composite column can meet the load-bearing requirements of the building structure.

[0044] Example 2

[0045] This embodiment provides another type of prefabricated square corrugated steel-concrete composite column, whose overall structure is basically the same as that of Embodiment 1. It also includes a square corrugated steel plate assembly 1, a first filling concrete 2, and a second filling concrete 3. The square corrugated steel plate assembly 1 is also composed of multiple component units. Each component unit is formed by splicing four corrugated steel plate members 11. The corrugated steel plate members 11 also include corrugated steel plates 111, grouting corner pieces 112, square steel components, connecting inserts 115, and guide inserts 116. The connection method, positional relationship, and concrete filling method of each component are the same as those of Embodiment 1. The main difference lies in the specific structure of the square steel components. In this embodiment, the square steel components adopt an elastic locking column anti-detachment structure.

[0046] like Figures 6-9As shown, the square steel component 113 includes a square steel body and multiple elastic locking post assemblies. The outer wall dimensions of the square steel body are adapted to the internal cavity dimensions of the n-shaped plate component 114 to ensure smooth insertion and engagement. The multiple elastic locking post assemblies are evenly spaced along the length of the square steel body. Each elastic locking post assembly includes a locking post 1131, a mounting base 1132, and a spring 1133. The spring 1133 is horizontally positioned and installed between the locking post 1131 and the mounting base 1132 to provide elastic thrust to the locking post 1131. The mounting base 1132 is fixedly installed on the side wall of the square steel body that does not have a guide through hole. This side wall can be provided with through holes for installing the elastic locking post assemblies as needed. Both the mounting base 1132 and the locking post 1131 have positioning structures adapted to the spring 1133 on their opposite end faces. These positioning structures can be positioning protrusions or positioning grooves, used to position the spring 1133, preventing it from shifting during extension and retraction, and ensuring that the spring 1133 can stably provide elastic force. On the side wall of the square steel body, guide holes are provided corresponding to the locking posts 1131 of each elastic locking post assembly. These guide holes are adapted to the cross-sectional dimensions of the locking posts 1131, and are designed as non-cylindrical through holes, such as elliptical through holes. The corresponding locking post 1131 also has an elliptical cross-section. This design prevents the locking post 1131 from rotating within the guide holes, ensuring stable extension and retraction. The locking post 1131 passes through the guide through hole, with one end connected to the spring 1133 and the other end able to extend or retract from the guide through hole. At the same time, a limiting structure 1134 is provided on the locking post 1131. The limiting structure 1134 is an anti-disengagement screw threaded on the locking post 1131, which can prevent the locking post 1131 from completely passing through the guide through hole under the pushing force of the spring 1133, thus playing a limiting role and ensuring the structural integrity of the elastic locking post assembly.

[0047] Correspondingly, on one side wall of the n-shaped plate 114, there are card holes 1142 that correspond one-to-one with the card posts 1131 of each elastic card post assembly. To facilitate the smooth insertion of the square steel component 113 into the internal cavity of the n-shaped plate component 114, an inclined surface 11311 is provided at the outer end of the locking post 1131. The inclination direction of the inclined surface 11311 is consistent with the direction in which the square steel component 113 is inserted into the n-shaped plate component 114. Thus, during the insertion of the square steel component 113, the inclined surface 11311 of the locking post 1131 forms a guiding compression with the cavity port of the n-shaped plate component 114, causing the locking post 1131 to be subjected to an inward compressive force. This automatically compresses the spring 1133 and retracts it into the guide through hole, preventing the locking post 1131 from obstructing the insertion of the square steel component 113. When the square steel component 113 is inserted to the preset position, the locking post 1131 will pop out under the pushing force of the spring 1133 and insert into the locking hole 1142, completing the anti-disengagement locking and effectively preventing the square steel component 113 from separating from the n-shaped plate component 114, ensuring the stability of the vertical connection between the upper and lower component units.

[0048] Example 3

[0049] This embodiment provides a construction method for a prefabricated square corrugated steel-concrete composite column, applicable to the prefabricated square corrugated steel-concrete composite column provided in Embodiment 1, including the following steps:

[0050] S100. Factory Prefabrication: In the factory, each corrugated steel plate component 11 is prepared in batches according to the specifications and dimensions of the design drawings. This includes cutting the corrugated steel plate 111, processing the grouting corner piece 112, processing the square steel components (square steel piece 113 and n-shaped plate piece 114), and welding and fixing the grouting corner piece 112, square steel components, and guide plug plate 116 onto the corrugated steel plate 111. At the same time, connecting plug plate 115 and other supporting components are also processed and prepared. After all prefabricated components are processed, quality inspection is required to ensure that the dimensional accuracy and welding quality of each component meet the design requirements. After passing the inspection, the components are transported to the construction site for use. Protective measures must be taken during transportation to avoid deformation or damage to the components.

[0051] S200, First Segment Component Unit Assembly: Four prefabricated qualified corrugated steel plate components 11 are hoisted to the construction site. The positions of each corrugated steel plate component 11 are adjusted so that the four corrugated steel plate components 11 correspond to the four sides of the square. Then, the four corrugated steel plate components 11 are spliced ​​and fixed by four connecting plates 115. The specific splicing method is as follows: the grouting corner pieces 112 of two adjacent corrugated steel plate components 11 are fitted and aligned so that their insertion through holes are aligned. Then, the web of the connecting plate 115 is inserted into the aligned insertion through hole, ensuring that the flange is tightly fitted to the surface of the connecting plate. The splicing of the four corrugated steel plate components 11 is completed, forming a complete first segment component unit.

[0052] S300, First section of component unit concrete construction: First, in order to ensure that the subsequent second section of component unit can be accurately connected, temporary positioning parts need to be inserted into the upper end of each grouting corner piece 112 of the first section of component unit. The structure and size of the temporary positioning parts are exactly the same as the guide plug plate 116, and the insertion depth is consistent with the design insertion depth of the guide plug plate 116 of the subsequent second section of component unit. The function of the temporary positioning parts is to reserve the insertion groove of the guide plug plate 116. Subsequently, the first filling concrete 2 is poured into the internal cavity of each grouting corner piece 112 of the first component unit. The first filling concrete 2 uses an early-strength grouting material, which has the characteristics of fast setting speed and high early strength. During the pouring, it is poured at a uniform speed through the grouting funnel along the upper opening of the grouting corner piece 112. During the pouring process, the pouring speed needs to be controlled to ensure that there are no air bubbles or voids in the internal cavity of the grouting corner piece 112. After the pouring is completed, the first filling concrete 2 is cured until it reaches more than 70% of the design strength. Then the temporary positioning piece is pulled out to avoid damage to the grouting corner piece 112 or the concrete due to insufficient curing. After the temporary positioning component is removed, the second filling concrete 3 is poured into the square cavity formed by the first component unit. Before pouring, longitudinal steel bars and stirrups can be inserted into the square cavity and tied into shape according to the design requirements to further improve the load-bearing capacity of the composite column. During the pouring process, an immersion vibrator is used to vibrate in layers, with each layer vibrating to a depth of no more than 500mm. Vibration continues until the concrete surface is covered with slurry and there is no obvious settlement, ensuring the density and structural integrity of the second filling concrete 3.

[0053] S400, Second-section component unit hoisting and docking: Hoist each corrugated steel plate component 11 of the second-section component unit to directly above the first-section component unit. During hoisting, precisely adjust the position so that the guide plug-in plate 116 at the lower end of each grouting corner piece 112 of the second-section component unit aligns with the upper opening of the corresponding grouting corner piece 112 of the first-section component unit. Then, slowly insert it along the insertion slot reserved in the temporary positioning piece. Through the guide plug-in plate 116 and the inner wall of the grouting corner piece 112, the upper and lower component units are precisely aligned. At the same time, align the n-shaped plate 114 of the second-section component unit with the square steel piece 113 of the first-section component unit and slowly insert it. Utilize the chamfered part on the square steel piece 113 and the appropriate elastic expansion of the opening of the n-shaped plate 114 to achieve smooth insertion. After full insertion, the anti-reverse strip 1141 inside the n-shaped plate 114 blocks the square steel piece 113, completing the vertical fixation of the upper and lower component units.

[0054] S500, Second Segment Component Unit Concrete Construction: Repeat step S300. First, insert temporary positioning pieces with the same structure and size as the guide plug plate 116 into the upper end of each grouting corner piece 112 of the second segment component unit. The insertion depth is consistent with the design insertion depth of the guide plug plate 116 of the subsequent segment component unit. Then, pour the first filling concrete 2 into the internal cavity of each grouting corner piece 112 of the second segment component unit. After curing to more than 70% of the design strength, pull out the temporary positioning pieces. Then, pour the second filling concrete 3 into the square cavity enclosed by the second segment component unit.

[0055] S600, Multi-segment Repeated Construction: Repeat steps S400-S500, and complete the installation of subsequent component units and concrete construction in sequence.

[0056] S700, Overall Curing and Shaping: After all concrete construction is completed, the composite column is covered and moisturized. The curing cycle is adjusted according to the ambient temperature to ensure that the first filling concrete 2 and the second filling concrete 3 reach the design strength, thus completing the construction of the composite column.

[0057] Example 4

[0058] This embodiment provides a construction method for a prefabricated square corrugated steel-concrete composite column, applicable to the prefabricated square corrugated steel-concrete composite column provided in Embodiment 2, including the following steps:

[0059] S100. Factory Prefabrication: In the factory, each corrugated steel plate component 11 is prepared in batches according to the specifications and dimensions of the design drawings. This includes cutting the corrugated steel plate 111, processing the grouting corner piece 112, processing the square steel components (square steel piece 113 and n-shaped plate piece 114), and welding and fixing the grouting corner piece 112, square steel components, and guide plug plate 116 onto the corrugated steel plate 111. At the same time, connecting plug plate 115 and other supporting components are also processed and prepared. After all prefabricated components are processed, quality inspection is required to ensure that the dimensional accuracy and welding quality of each component meet the design requirements. After passing the inspection, the components are transported to the construction site for use. Protective measures must be taken during transportation to avoid deformation or damage to the components.

[0060] S200, First Segment Component Unit Assembly: Four prefabricated qualified corrugated steel plate components 11 are hoisted to the construction site. The positions of each corrugated steel plate component 11 are adjusted so that the four corrugated steel plate components 11 correspond to the four sides of the square. Then, the four corrugated steel plate components 11 are spliced ​​and fixed by four connecting plates 115. The specific splicing method is as follows: the grouting corner pieces 112 of two adjacent corrugated steel plate components 11 are fitted and aligned so that their insertion through holes are aligned. Then, the web of the connecting plate 115 is inserted into the aligned insertion through hole, ensuring that the flange is tightly fitted to the surface of the connecting plate. The splicing of the four corrugated steel plate components 11 is completed, forming a complete first segment component unit.

[0061] S300, First section of component unit concrete construction: First, in order to ensure that the subsequent second section of component unit can be accurately connected, temporary positioning parts need to be inserted into the upper end of each grouting corner piece 112 of the first section of component unit. The structure and size of the temporary positioning parts are exactly the same as the guide plug plate 116, and the insertion depth is consistent with the design insertion depth of the guide plug plate 116 of the subsequent second section of component unit. The function of the temporary positioning parts is to reserve the insertion groove of the guide plug plate 116. Subsequently, the first filling concrete 2 is poured into the internal cavity of each grouting corner piece 112 of the first component unit. The first filling concrete 2 uses an early-strength grouting material, which has the characteristics of fast setting speed and high early strength. During the pouring, it is poured at a uniform speed through the grouting funnel along the upper opening of the grouting corner piece 112. During the pouring process, the pouring speed needs to be controlled to ensure that there are no air bubbles or voids in the internal cavity of the grouting corner piece 112. After the pouring is completed, the first filling concrete 2 is cured until it reaches more than 70% of the design strength. Then the temporary positioning piece is pulled out to avoid damage to the grouting corner piece 112 or the concrete due to insufficient curing. After the temporary positioning component is removed, the second filling concrete 3 is poured into the square cavity formed by the first component unit. Before pouring, longitudinal steel bars and stirrups can be inserted into the square cavity and tied into shape according to the design requirements to further improve the load-bearing capacity of the composite column. During the pouring process, an immersion vibrator is used to vibrate in layers, with each layer vibrating to a depth of no more than 500mm. Vibration continues until the concrete surface is covered with slurry and there is no obvious settlement, ensuring the density and structural integrity of the second filling concrete 3.

[0062] S400, Second section component unit hoisting and docking: Hoist each corrugated steel plate component 11 of the second section component unit to directly above the first section component unit. During the hoisting process, precisely adjust the position so that the guide plug plate 116 at the lower end of each grouting corner piece 112 of the second section component unit is aligned with the upper opening of the corresponding grouting corner piece 112 of the first section component unit. Then, slowly insert it along the insertion slot reserved in the temporary positioning piece. Through the fit and guidance of the guide plug plate 116 with the inner wall of the grouting corner piece 112, the upper and lower section component units are precisely aligned. While the guide plate 116 is being inserted, the n-shaped plate 114 of the second component unit is aligned with the square steel piece 113 of the first component unit and slowly inserted. During the insertion process, the inclined surface 11311 of the outer end of the locking post 1131 on the square steel piece 113 will press against the cavity port of the n-shaped plate 114. The pressing force causes the locking post 1131 to be subjected to a force inward of the square steel piece 113, thereby compressing the spring 1133 and causing the locking post 1131 to retract into the guide through hole of the square steel piece 113, thus preventing the locking post 1131 from obstructing the insertion of the square steel piece 113. Continue to slowly insert the square steel component 113. When the square steel component 113 is inserted to a certain position, the locking post 1131 will extend out of the guide hole under the elastic thrust of the spring 1133 and accurately insert into the corresponding locking hole 1142 on the side wall of the n-shaped plate 114, forming a firm anti-detachment lock, effectively preventing the square steel component 113 from separating from the n-shaped plate 114, and completing the vertical fixation of the upper and lower component units. After fixation is completed, check the splicing accuracy, connection firmness and insertion of the locking post 1131 of the upper and lower component units to ensure that the locking post 1131 is fully inserted into the locking hole 1142 without any loosening or displacement.

[0063] S500, Second Segment Component Unit Concrete Construction: Repeat step S300. First, insert temporary positioning pieces with the same structure and size as the guide plug plate 116 into the upper end of each grouting corner piece 112 of the second segment component unit. The insertion depth is consistent with the design insertion depth of the guide plug plate 116 of the subsequent segment component unit. Then, pour the first filling concrete 2 into the internal cavity of each grouting corner piece 112 of the second segment component unit. After curing to more than 70% of the design strength, pull out the temporary positioning pieces. Then, pour the second filling concrete 3 into the square cavity enclosed by the second segment component unit.

[0064] S600, Multi-segment Repeated Construction: Repeat steps S400-S500, and complete the installation of subsequent component units and concrete construction in sequence.

[0065] S700, Overall Curing and Shaping: After all concrete construction is completed, the composite column is covered and moisturized. The curing cycle is adjusted according to the ambient temperature to ensure that the first filling concrete 2 and the second filling concrete 3 reach the design strength, thus completing the construction of the composite column.

[0066] In summary, this invention, by setting up an assembled square corrugated steel plate assembly 1, segmented component units and matching plug-in connection structures, adopts a factory prefabrication and on-site plug-in assembly mode, eliminating the need for extensive on-site welding. Combined with a double-filled concrete design, it solves the problems of complicated on-site construction, difficulty in controlling welding quality, unreliable segmented connections and low construction efficiency of existing corrugated side plate-square steel tube concrete columns.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A prefabricated square corrugated steel-concrete composite column, characterized in that, The system includes a square corrugated steel plate assembly (1) and a first filling concrete (2) and a second filling concrete (3) poured into the square corrugated steel plate assembly (1). The square corrugated steel plate assembly (1) includes multiple component units arranged sequentially from top to bottom. The first filling concrete (2) and the second filling concrete (3) include concrete segments cast in sections corresponding to the multiple component units. The component unit includes four corrugated steel plate members (11). The corrugated steel plate members (11) include a corrugated steel plate (111), grouting corner pieces (112) welded to the left and right sides of the corrugated steel plate (111), square steel components welded to the upper and lower ends of the corrugated steel plate (111), and a system using... A connecting insert (115) is provided for the grouting corner piece (112) connecting two adjacent corrugated steel plate components (11); the grouting corner piece (112) has a connecting plate portion, and the connecting insert (115) is inserted and connected to the connecting plate portions of the two grouting corner pieces (112), and at this time the connecting plate portions of the two grouting corner pieces (112) are fitted and aligned to form a complete mating surface; the square steel component includes a square steel piece (113) that can be inserted and fitted together and prevented from falling off at the top and bottom and an n-shaped plate piece (114); the first filling concrete (2) is filled in each grouting corner piece (112), and the second filling concrete (3) is filled in the square cavity formed by the enclosing of multiple component units.

2. A prefabricated square corrugated steel-concrete composite column according to claim 1, characterized in that, The cross-section of the grouting corner piece (112) is an isosceles right triangle. The corrugated steel plate (111) is connected to the right-angled side of the grouting corner piece (112). The hypotenuse of the grouting corner piece (112) is a connecting plate.

3. A prefabricated square corrugated steel-concrete composite column according to claim 1, characterized in that, The grouting corner piece (112) has a through-hole that runs vertically through its inclined side. The connecting plate (115) has an I-shaped cross-section. The connecting plate (115) includes a wing plate and a web plate. The thickness of the web plate is the same as the width of the through-hole. The width of the web plate is the same as the total thickness of the connecting plate portion of the two grouting corner pieces (112) that fit together and are aligned.

4. A prefabricated square corrugated steel-concrete composite column according to claim 1, characterized in that, The outer wall dimensions of the square steel member (113) are adapted to the internal cavity dimensions of the n-shaped plate member (114). An anti-retraction strip (1141) is provided on the inner side of the opening of the internal cavity of the n-shaped plate member (114). Both the anti-retraction strip (1141) and the insertion end of the square steel member (113) are provided with chamfered portions to facilitate the insertion of the square steel member (113) into the internal cavity of the n-shaped plate member (114).

5. A prefabricated square corrugated steel-concrete composite column according to claim 1, characterized in that, The outer wall dimensions of the square steel member (113) are adapted to the internal cavity dimensions of the n-shaped plate member (114). The square steel member (113) includes a square steel and multiple elastic locking post assemblies, each elastic locking post assembly being arranged sequentially along the length of the square steel. Each elastic locking post assembly includes a locking post (1131), a mounting base (1132), and a spring (1133). The spring (1133) is horizontally arranged between the locking post (1131) and the mounting base (1132). The side wall of the square steel member (113) is provided with guide through holes corresponding one-to-one with the locking posts (1131) of each elastic locking post assembly. The locking pin (1131) passes through the guide through hole, and the locking pin (1131) is provided with a limiting structure (1134) to prevent the locking pin (1131) from completely passing through the guide through hole; the side wall of the n-shaped plate (114) is provided with locking holes (1142) corresponding to the locking pins (1131) of each elastic locking pin assembly. When the square steel piece (113) is inserted into the internal cavity of the n-shaped plate (114) to the preset position, the locking pin (1131) extends out of the guide through hole and inserts into the corresponding locking hole (1142) under the elastic thrust of the spring (1133), forming an anti-disengagement lock.

6. A prefabricated square corrugated steel-concrete composite column according to claim 5, characterized in that, The spring (1133) is located in the square steel, and the mounting base (1132) is installed on the other side wall of the square steel without the guide through hole. The opposite end faces of the mounting base (1132) and the locking post (1131) are provided with positioning structures adapted to the spring (1133). The positioning structure is a positioning protrusion or a positioning groove. The limiting structure (1134) is an anti-loosening screw threaded on the locking post (1131).

7. A prefabricated square corrugated steel-concrete composite column according to claim 6, characterized in that, The guide through hole is adapted to the cross-sectional dimensions of the locking post (1131), and the guide through hole is a non-cylindrical through hole. The outer end of the locking post (1131) is provided with an inclined surface (11311). The inclined direction of the inclined surface (11311) is consistent with the direction of the square steel part (113) inserted into the n-shaped plate (114). It is used to form a guiding squeeze with the cavity port of the n-shaped plate (114) during the insertion process, so that the locking post (1131) automatically compresses the spring (1133) and retracts into the guide through hole when the square steel part (113) and the n-shaped plate (114) are inserted and connected.

8. A prefabricated square corrugated steel-concrete composite column according to any one of claims 1-7, characterized in that, The corrugated steel plate component (11) also includes a guide plug plate (116) for guiding the grouting corner piece (112) connecting two adjacent component units. One end of the guide plug plate (116) is fixed to the lower opening of the grouting corner piece (112) of the upper component unit, and the other end can be inserted into the upper opening of the grouting corner piece (112) of the lower component unit. At this time, the outer wall of the guide plug plate (116) is in contact with at least two adjacent inner walls of the grouting corner piece (112).

9. A construction method for a prefabricated square corrugated steel-concrete composite column, used for the prefabricated square corrugated steel-concrete composite column as described in claim 8, characterized in that, Includes the following steps: S100, Factory prefabrication: Preparation of corrugated steel plate components (11); S200, First section of component unit assembly: The four corrugated steel plate components (11) are hoisted to the construction site and connected into a complete component unit by four connecting plates (115); S300, First section of component unit concrete construction: First, pour the first filling concrete (2) into the internal cavity of each grouting corner piece (112) of the first section of component unit, and after curing to more than 70% of the design strength, pour the second filling concrete (3) into the square cavity enclosed by the first section of component unit. S400, Second section component unit hoisting and docking: Hoist each corrugated steel plate component (11) of the second section component unit to the top of the first section component unit, align the guide plug plate (116) at the bottom of the grouting corner piece (112) of the second section component unit with the upper opening of the grouting corner piece (112) of the first section component unit, and slowly insert it to achieve precise alignment of the upper and lower component units. At the same time, align the square steel piece (113) or n-shaped plate piece (114) of the second section component unit with the n-shaped plate piece (114) or square steel piece (113) of the first section component unit, and complete the vertical fixation through the anti-detachment cooperation structure of the two. S500, Second section component unit concrete construction: Repeat the operation of step S300, first pour the first filling concrete (2) into the internal cavity of each grouting corner piece (112) of the second section component unit, and after curing to more than 70% of the design strength, pour the second filling concrete (3) into the square cavity enclosed by the second section component unit. S600, Multi-segment Repeated Construction: Repeat steps S400-S500, and complete the installation of subsequent component units and concrete construction in sequence.

10. A construction method for a prefabricated square corrugated steel-concrete composite column according to claim 9, characterized in that, The first filling concrete (2) uses early strength grouting material. During the grouting process, it is injected at a uniform speed through the grouting funnel along the upper opening of the grouting corner piece (112). Before the second filling concrete (3) is poured, longitudinal steel bars and stirrups can be inserted into the square cavity according to the design requirements and tied into shape. During the pouring process, an immersion vibrator is used to vibrate in layers. The vibration depth of each layer does not exceed 500mm. Vibrate until the concrete surface is covered with slurry and there is no obvious sinking. It also includes step S700, overall curing and molding: After all concrete construction is completed, the composite column is covered and moisturized. The curing cycle is adjusted according to the ambient temperature to ensure that the first filling concrete (2) and the second filling concrete (3) reach the design strength and the composite column construction is completed.

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