Precast concrete column dry-type connection joint and method

Abstract

The invention relates to a prefabricated concrete column dry-type connecting node and method.The node comprises a connecting body, the connecting body comprises a connecting bottom plate, a connecting plate and a slurry sealing plate, the slurry sealing plate is arranged above the connecting bottom plate, one end of the connecting plate is connected with the connecting bottom plate, and the other end of the connecting plate penetrates through the slurry sealing plate; the connecting ribs of the upper prefabricated columns are connected with the connecting plates in parallel and connected with the slurry sealing plates, the connecting ribs of the lower prefabricated columns penetrate through the connecting bottom plates, the connecting ribs are provided with connecting nuts above the connecting bottom plates, and the connecting ribs are provided with elevation adjusting nuts below the connecting bottom plates. The top end of the connecting rib of the lower prefabricated column is provided with an elevation adjusting nut to the designed elevation, a cavity formed by the slurry sealing strip is filled with seat slurry, the connecting body of the upper prefabricated column falls into the cavity, the seat slurry is extruded, and the connecting nut is screwed down. Compared with the prior art, the hidden danger of joint connection failure is eliminated, the joint installation space is abundant, and the defect that grouting is not compact is overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled buildings and relates to a prefabricated concrete column dry connection node and method. Background Art

[0002] The connection technology of steel bars is the key technology for transmitting tensile force in prefabricated concrete structures. The connection parts must first ensure that the internal force can be smoothly transmitted under the action of load, and secondly, the connection parts must have sufficient rigidity and good restoring force characteristics. Domestic and foreign scholars have developed a variety of steel bar connection technologies. At present, the main method is sleeve grouting connection. A single ribbed steel bar is inserted into a metal sleeve and a grouting mixture is injected. The mixture is hardened to form a whole and realize the steel bar butt connection that transmits force. It is referred to as sleeve grouting connection.

[0003] During sleeve grouting connection, the grouting quality has a crucial influence on the actual bearing capacity of the steel sleeve grouting connection joint. When the manufacturing accuracy of the component does not meet the requirements, the connecting steel bars are easily cut or shortened, and the connection strength requirements cannot be met. Construction defects such as loose grouting and grouting leakage often occur during grouting construction. Since the construction cannot be visually detected, once the defects are formed, they are basically impossible to repair later.

[0004] When installing prefabricated columns, at least two temporary diagonal braces need to be set up. Corresponding diagonal brace embedded parts also need to be set on the corresponding floor surfaces and cannot be reused.

[0005] Patent CN112112264A discloses a prefabricated column connection node and construction method for dry connection, including a prefabricated column body, a column-to-column connection piece connected to the lower end of the prefabricated column body, the column-to-column connection piece including a belly, an upper flange portion and a lower flange portion are respectively provided at the upper and lower ends of the outer periphery of the belly, the lower flange portion is used to be connected to the connection portion extending from the upper end of another prefabricated column; during construction, the upper prefabricated column is hoisted, the connection portion of the extending end of the prefabricated column body of this layer is aligned with the lower flange portion of the upper prefabricated column, the verticality of the upper prefabricated column is adjusted, bolts or nuts are installed, and the nuts are tightened with special tools; grouting is performed in the gap between the upper and lower columns and in the bolt hand holes, and the curing reaches a certain strength to complete the connection between the prefabricated columns. However, the steel bars in this patent are vertically connected to the upper flange, and the force transmitted by the steel bars is transmitted to the upper flange plate and the stiffening plate through the steel bars and then to the lower flange plate. The upper flange plate is prone to warping and deformation under the tension of the steel bars, causing its node to fail. Therefore, it is necessary to design more stiffening plates between the upper and lower flanges, which makes it easy for the connecting longitudinal bars and the stiffening plates to collide, leaving less construction and installation space, and is only suitable for columns with smaller bearing capacity. This patent directly uses post-grouting technology in prefabricated columns. Post-grouting is prone to produce bubbles that cannot be discharged in the grouting space, which is also prone to causing loose grouting, and this defect cannot be visually monitored or detected. Summary of the invention

[0006] The purpose of the present invention is to provide a precast concrete column dry connection node and method in order to overcome at least one defect of the above-mentioned prior art. The present invention eliminates the hidden danger of node connection failure, provides ample node installation space, and avoids the defect of loose grouting.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] One of the technical solutions of the present invention is to provide a precast concrete column dry connection node, the node includes a connector, the connector includes a connection base plate, a connection plate and a sealing plate, the sealing plate is arranged above the connection base plate, one end of the connection plate is connected to the connection base plate, and the other end passes through the sealing plate.

[0009] The prefabricated columns are provided with connecting ribs, the connecting ribs of the upper prefabricated columns are connected in parallel to the connecting plates and the sealing mortar plates, the connecting ribs of the lower prefabricated columns pass through the connecting bottom plates, the connecting ribs are provided with connecting nuts above the connecting bottom plates, and height adjustment nuts below, and sealing mortar strips are provided on the beams at the nodes outside the lower prefabricated columns.

[0010] After the prefabricated columns are cured to the designed strength, they are transported to the project site. The top of the connecting ribs at the corners of the lower prefabricated columns is installed with an elevation adjustment nut to the designed elevation. Then, the sealing strip is installed. The seat slurry is poured into the cavity formed by the top of the lower prefabricated column and the sealing strip. Then, the upper prefabricated column is hoisted. The connecting ribs at the corners of the lower prefabricated columns and the connecting rib holes of the upper prefabricated column connector are aligned and fall in. The seat slurry is squeezed. Then, the connecting nut is tightened. After confirmation, the locking nut is installed. At this point, the two prefabricated columns are connected as a whole.

[0011] The prefabricated columns are manufactured in the factory, in which connectors and connecting bars are pre-embedded. The two prefabricated columns are connected as a whole on site through seat mortar, connectors, connecting bars, height adjustment nuts, connecting nuts and locking nuts.

[0012] As a preferred technical solution, a slurry sealing plate is arranged above the connecting bottom plate in parallel or obliquely upward.

[0013] Furthermore, the laying liquid level of the seat slurry is higher than the upper surface of the height adjustment nut.

[0014] As a preferred technical solution, the seat slurry includes cement-based grouting material or structural adhesive.

[0015] Furthermore, the connecting rib is provided with a locking nut above the connecting nut.

[0016] Furthermore, the lower limit of the concrete area of ​​the precast column is above the connecting bottom plate and the sealing plate and the inner side of the connecting plate. There is no concrete between the connecting bottom plate and the sealing plate and the outer side of the connecting plate. When the column is precast, the concrete does not invade the bolt connection area, and the connecting rib is exposed above the concrete area of ​​the precast column.

[0017] As a preferred technical solution, the connecting reinforcement is provided with a threaded opening at the exposed end of the prefabricated column, and the threaded openings of the height adjustment nut, the connecting nut and the locking nut match the threaded openings of the connecting reinforcement.

[0018] Furthermore, the sealing strip adopts a panel with a cavity inside, and the panel is surrounded by solid plates or hollow plates. The cross-sectional shape of the panel is rectangular. The inner shape of the sealing strip is consistent with the outer shape of the connecting base plate, including rectangle, circle, T-shape, C-shape, H-shape, trapezoid or other polygons. The inner dimension is larger than the outer dimension of the connecting base plate, and the height is larger than the thickness of the joint seam of the prefabricated column (the thickness of the seat mortar).

[0019] Furthermore, the connecting bars are connected by stirrups to form a steel skeleton.

[0020] As a preferred technical solution, the connecting bars and stirrups are made of steel.

[0021] Furthermore, the connecting ribs are distributed outside the connecting plates, and the connecting ribs are bent in a Z-shape and connected to the connecting plates in parallel;

[0022] The connecting bottom plate is provided with connecting rib holes according to the number and position of the connecting ribs, the connecting rib holes pass through the connecting ribs, and the inner diameter of the connecting rib holes is greater than the outer diameter of the connecting ribs.

[0023] Furthermore, the horizontal projection shape and outer dimensions of the connecting bottom plate and the sealing mortar plate are consistent with the cross-section of the prefabricated column, including rectangular, circular, T-shaped, C-shaped, H-shaped, trapezoidal or other polygonal shapes;

[0024] The connecting plate is a plate with a cavity inside, and the outer shape of the connecting plate is consistent with the cross section of the prefabricated column, including a rectangle, a circle, a T-shape, a C-shape, an H-shape, a trapezoid or other polygons, and the outer size is smaller than the cross section of the prefabricated column;

[0025] The sealing plate is provided with a connecting plate hole, through which the connecting plate passes, and the inner dimension of the connecting plate hole is greater than the outer dimension of the connecting plate.

[0026] Furthermore, stiffening ribs are arranged around the connecting plate, the bottom of the stiffening ribs is connected to the connecting bottom plate, and the plane shape of the stiffening ribs is a right-angled trapezoid that is short on the top and long on the bottom.

[0027] As a preferred technical solution, the connector is made of steel and is cast in one piece, or is welded by connecting the bottom plate, stiffening ribs, connecting plate and sealing plate with a certain thickness.

[0028] One of the technical solutions of the present invention is to provide a precast concrete column dry connection method, which uses the node to perform precast concrete column dry connection, comprising the following steps:

[0029] S1. Make the connecting bottom plate, stiffening ribs, connecting plate and sealing plate, weld them into a whole according to the requirements, or cast them into an integrated body, and assemble them into a connecting body;

[0030] S2, processing connecting bars and stirrups, tapping the top of the connecting bars, and assembling the connecting bars and stirrups into a steel skeleton;

[0031] S3, welding the connector and the steel bar skeleton to form a combined body, wherein the connecting ribs and the connecting plate are connected by lap welding;

[0032] S4, assembling the assembly into the mold of the prefabricated column, casting the prefabricated column, curing it to the required strength, and transporting it to the site;

[0033] S5. Clean the top of the prefabricated column and install the elevation adjustment nut to the top of the connecting rib at the corner of the prefabricated column to the required elevation;

[0034] S6. Install the sealing strips, clean the inner cavity surrounded by the sealing strips, and then pour the seat slurry. The laying liquid level of the seat slurry is higher than the upper surface of the height adjustment nut;

[0035] S7, hoist the prefabricated column, align the connection rib holes of the connector with the connection ribs at the corners of the prefabricated column, and then drop the prefabricated column;

[0036] S8. Install the connecting nut at the connecting rib where the height adjustment nut is installed. The column top hook can be unhooked after the installation torque of the connecting nut reaches the requirement;

[0037] S9. After the seat slurry is cured to a certain strength, install the remaining connecting nuts and the locking nut, and the connection is completed.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] (1) The connecting ribs of the present invention are directly connected to the connecting plates, eliminating the hidden danger of failure of the node connection due to deformation of the sealing plate; the connecting plates directly transmit the tensile force of the connecting ribs, reducing the number of stiffening ribs, and providing ample installation space; the connection ribs are not limited by the column cross-section size and force magnitude, and have a wide range of applications; the nodes have a grouting function, avoiding the defects of loose grouting and difficulty in remedying;

[0040] (2) The present invention eliminates the existing sleeve connection method, and can monitor the installation quality in real time by reading the torque wrench when installing the nut, realizing visual inspection and testing of the column reinforcement connection, and avoiding the hidden dangers of loose grouting or grouting leakage of the sleeve connection;

[0041] (3) When the connecting nut and the elevation adjustment nut of the present invention work together, the stability of the column during installation can be maintained, and the temporary diagonal brace and the embedded parts required for the diagonal brace installation can be eliminated, which greatly reduces the auxiliary materials for installation and eliminates the installation and disassembly process of the diagonal brace, thereby greatly improving the installation efficiency;

[0042] (4) The present invention adopts a seat slurry construction method. The liquid level of the seat slurry laid in advance is higher than the upper surface of the elevation adjustment nut (the elevation of the bottom of the upper column connected to the column), that is, the volume of the seat slurry is greater than the volume of the gap between the upper column bottom connector and the lower column top. When the column is installed in place, the seat slurry is slightly squeezed out, and the excess seat slurry forms a micro-pressure. During the solidification process of the seat slurry, the seat slurry can fall back to fill the residual bubbles in the seat slurry and fill the gaps between the columns, thereby avoiding the seat slurry being loose and ensuring that the pressure of the column is effectively transmitted under pressure conditions;

[0043] (5) The connecting ribs and connecting plates of the present invention are lap welded, which is easy to construct. Force is directly transmitted through the connecting ribs and connecting plates. The thickness of the connecting plates is determined according to the number of connecting ribs. A small number of stiffening ribs are provided according to the structure. The bearing capacity of the column is not limited by the connection nodes, and the installation space is also not limited by the nodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of a precast concrete column dry connection node in an embodiment of the present invention;

[0045] Figure 2 AA cross-sectional structural schematic diagram of a precast concrete column dry connection node in an embodiment of the present invention;

[0046] Figure 3 BB cross-sectional structural schematic diagram of a precast concrete column dry connection node in an embodiment of the present invention;

[0047] Figure 4 is a schematic cross-sectional structural diagram of a connector in an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of the connecting base plate in an embodiment of the present invention;

[0049] Figure 6 It is a structural schematic diagram of a stiffening rib in an embodiment of the present invention;

[0050] Figure 7 is a schematic cross-sectional structural diagram of a connecting plate in an embodiment of the present invention;

[0051] Figure 8 Schematic diagram of the structure of the pulp sealing plate in an embodiment of the present invention.

[0052] Description of the markings in the figure:

[0053] 1—connector, 2—height adjustment nut, 3—connecting nut, 4—locking nut, 5—connecting reinforcement, 6—precast column, 7—sealing grouting strip, 8—seat grout, 9—beam, 10—stirrup;

[0054] 11—connecting base plate, 12—stiffening ribs, 13—connecting plate, 14—sealing plate, 15—connecting rib holes, 16—connecting plate holes. DETAILED DESCRIPTION

[0055] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0056] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 addition, the terms "first", "second", "third", etc. are used to describe common objects, which only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other way.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Example:

[0059] A precast concrete column dry connection node, such as Figures 1 to 4 As shown, the connector 1 includes a connecting body 1, which includes a connecting bottom plate 11, a connecting plate 13 and a sealing plate 14. The sealing plate 14 is arranged above the connecting bottom plate 11. One end of the connecting plate 13 is connected to the connecting bottom plate 11, and the other end passes through the sealing plate 14.

[0060] The sealing plate 14 is arranged parallel to or obliquely upward on the connecting bottom plate 11, and is preferably arranged parallel to each other in this embodiment;

[0061] A plurality of connecting ribs 5 are arranged in the prefabricated column 6. The connecting ribs 5 of the upper prefabricated column 6 are connected in parallel to the connecting plate 13 and the sealing plate 14. The connecting ribs 5 of the lower prefabricated column 6 pass through the connecting bottom plate 11. The connecting ribs 5 are provided with a plurality of connecting nuts 3 above the connecting bottom plate 11 and a height adjustment nut 2 below. A sealing strip 7 is arranged on the beam 9 at the node outside the lower prefabricated column 6.

[0062] After the prefabricated column 6 is cured to the designed strength, it is transported to the project site. The top of the connecting rib 5 at the corner of the lower prefabricated column 6 is installed with the elevation adjustment nut 2 to the designed elevation, and then the sealing strip 7 is installed. The seat slurry 8 is poured into the cavity formed by the top of the lower prefabricated column 6 and the sealing strip 7, and then the upper prefabricated column 6 is hoisted. The connecting rib 5 at the corner of the lower prefabricated column 6 and the connecting rib hole 15 of the connector 1 of the upper prefabricated column 6 are aligned and fall into the connection, squeezing the seat slurry 8, and then tightening the connecting nut 3. After confirming that it is correct, install the locking nut 4. At this point, the two prefabricated columns 6 are connected as a whole;

[0063] The prefabricated column 6 is manufactured in the factory, the connector 1 and the connecting rib 5 are embedded in the prefabricated column 6, and the two prefabricated columns 6 are connected as a whole on site by means of the seat grout 8, the connector 1, the connecting rib 5, the height adjustment nut 2, the connecting nut 3 and the locking nut 4;

[0064] The laying liquid level of the seat slurry 8 is higher than the upper surface of the height adjustment nut 2;

[0065] The seat slurry 8 includes cement-based grouting material or structural adhesive, and in this embodiment, structural adhesive is preferred;

[0066] The connecting rib 5 is provided with a locking nut 4 above the connecting nut 3;

[0067] The lower limit of the concrete area of ​​the precast column 6 is above the connection bottom plate 11 and the sealing plate 14 and the inner side of the connection plate 13. There is no concrete between the connection bottom plate 11 and the sealing plate 14 and the outer side of the connection plate 13. When the column is precast, the concrete does not invade the bolt connection area, and the connecting rib 5 is exposed above the concrete area of ​​the precast column 6.

[0068] The connecting rib 5 is provided with a threaded opening at the exposed end of the prefabricated column 6, and the threaded openings of the height adjustment nut 2, the connecting nut 3 and the locking nut 4 match the threaded openings of the connecting rib 5;

[0069] The sealing strip 7 is a panel with a cavity inside, and the panel is surrounded by a solid panel or a hollow panel. In this embodiment, a solid panel is preferred. The cross-sectional shape of the panel is rectangular. The inner shape of the sealing strip 7 is consistent with the outer shape of the connecting bottom plate 11, including a rectangle, a circle, a T-shape, a C-shape, an H-shape, a trapezoid or other polygons. In this embodiment, the inner and outer shapes are preferably rectangular, and the inner size is slightly larger than the outer size of the connecting bottom plate 11, and the height is greater than the thickness of the joint of the prefabricated column 6 (the thickness of the seat mortar 8);

[0070] A plurality of connecting bars 5 are connected by a plurality of stirrups 10 to form a steel reinforcement skeleton;

[0071] The material of the connecting reinforcement 5 and the stirrup 10 is steel;

[0072] The connecting ribs 5 are distributed outside the connecting plate 13, and the connecting ribs 5 are bent in a Z shape and connected in parallel to the connecting plate 13;

[0073] like Figures 5 to 8 As shown, the horizontal projection shape and outer dimensions of the connecting bottom plate 11 and the sealing plate 14 are consistent with the cross-section of the prefabricated column 6, including a rectangle, a circle, a T-shape, a C-shape, an H-shape, a trapezoid or other polygons, and in this embodiment, a rectangle is preferred;

[0074] A plurality of connecting rib holes 15 are provided on the connecting bottom plate 11 according to the number and position of the connecting ribs 5. The connecting rib holes 15 pass through the connecting ribs 5, and the inner diameter of the connecting rib holes 15 is greater than the outer diameter of the connecting ribs 5.

[0075] The connecting plate 13 is a panel with a cavity inside. The outer shape of the connecting plate 13 is consistent with the cross section of the prefabricated column 6, including a rectangle, a circle, a T-shape, a C-shape, an H-shape, a trapezoid or other polygons. In this embodiment, the inner and outer shapes are preferably a rectangle, and the outer size is smaller than the cross section of the prefabricated column 6;

[0076] The sealing plate 14 is provided with a connecting plate hole 16, through which the connecting plate 13 passes, and the inner dimension of the connecting plate hole 16 is slightly larger than the outer dimension of the connecting plate 13;

[0077] The connecting plate 13 is surrounded by reinforcing ribs 12, the bottom of the reinforcing ribs 12 is connected to the connecting bottom plate 11, and the plane shape of the reinforcing ribs 12 is a right-angled trapezoid with a short top and a long bottom.

[0078] The connector 1 is made of steel and can be integrally cast or welded together with the bottom plate 11, stiffening ribs 12, connecting plate 13 and sealing plate 14, etc., which have a certain thickness. In this embodiment, the connector 1 is preferably welded together with the plates.

[0079] A method for dry connection of precast concrete columns, using the above-mentioned node to dry connect precast concrete columns, the specific steps are as follows:

[0080] S1, manufacturing a connecting bottom plate 11, a stiffening rib 12, a connecting plate 13 and a sealing plate 14, welding them into a whole according to requirements, or integrally casting them, and assembling them into a connecting body 1;

[0081] S2, processing the connecting ribs 5 and the stirrups 10, tapping the top of the connecting ribs 5, and assembling the connecting ribs 5 and the stirrups 10 into a steel skeleton;

[0082] S3, welding the connector 1 and the steel frame to form a combined body, and connecting the connecting ribs 5 and the connecting plate 13 by lap welding;

[0083] S4, assembling the assembly into the mold of the prefabricated column 6, casting the prefabricated column 6, curing to the required strength, and transporting to the site;

[0084] S5. Clean the top of the prefabricated column 6, and install the height adjustment nut 2 to the top of the connecting rib 5 at the corner of the prefabricated column 6 to the required height;

[0085] S6, install the sealing strip 7, clean the inner cavity surrounded by the sealing strip 7, and then pour the seat slurry 8, the laying liquid level of the seat slurry 8 is higher than the upper surface of the height adjustment nut 2;

[0086] S7, hoisting the prefabricated column 6, aligning the connection rib holes 15 of the connector 1 with the connection ribs 5 at the corners of the prefabricated column 6, and then dropping the prefabricated column 6;

[0087] S8. Install the connecting nut 3 at the connecting rib 5 where the height adjustment nut 2 is installed. The column top hook can be unhooked after the installation torque of the connecting nut 3 reaches the requirement.

[0088] S9. After the seat slurry 8 is cured to a certain strength, install the remaining connecting nuts 3 and the locking nuts 4, and the connection is completed.

[0089] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A precast concrete column dry connection node, characterized in that: The node comprises a connecting body (1), the connecting body (1) comprising a connecting bottom plate (11), a connecting plate (13) and a sealing plate (14), the sealing plate (14) being arranged above the connecting bottom plate (11), one end of the connecting plate (13) being connected to the connecting bottom plate (11), and the other end passing through the sealing plate (14), The prefabricated column (6) is provided with a connecting rib (5), the connecting rib (5) of the upper prefabricated column (6) is connected in parallel to the connecting plate (13) and the sealing plate (14), the connecting rib (5) of the lower prefabricated column (6) passes through the connecting bottom plate (11), the connecting rib (5) is provided with a connecting nut (3) above the connecting bottom plate (11), and a height adjustment nut (2) is provided below, and a sealing strip (7) is provided on the beam (9) at the node outside the lower prefabricated column (6), The top of the connecting rib (5) of the lower prefabricated column (6) is installed with an elevation adjustment nut (2) to the designed elevation, the seat slurry (8) is poured into the cavity formed by the top of the lower prefabricated column (6) and the sealing strip (7), the connecting body (1) of the upper prefabricated column (6) falls into it, the seat slurry (8) is squeezed, and the connecting nut (3) is tightened.

2. A precast concrete column dry connection node according to claim 1, characterized in that: The laying liquid surface of the seat slurry (8) is higher than the upper surface of the height adjustment nut (2).

3. The precast concrete column dry connection node according to claim 1, characterized in that: The connecting rib (5) is provided with a locking nut (4) above the connecting nut (3).

4. The precast concrete column dry connection node according to claim 1, characterized in that: The lower limit of the concrete area of ​​the prefabricated column (6) is above the connection base plate (11) and the sealing plate (14) and the inner side of the connection plate (13), and a section of the connection rib (5) is exposed above the concrete area of ​​the prefabricated column (6).

5. The precast concrete column dry connection node according to claim 1, characterized in that: The sealing strip (7) is a panel with a cavity inside. The inner shape of the sealing strip (7) is consistent with the outer shape of the connecting bottom plate (11), the inner size is larger than the outer size of the connecting bottom plate (11), and the height is larger than the thickness of the joint seam of the prefabricated column (6).

6. The precast concrete column dry connection node according to claim 1, characterized in that: The connecting bars (5) are connected via stirrups (10) to form a steel bar skeleton.

7. The precast concrete column dry connection node according to claim 1, characterized in that: The connecting ribs (5) are distributed outside the connecting plate (13), and the connecting ribs (5) are connected in parallel to the connecting plate (13) after being bent in a Z-shape; The connecting bottom plate (11) is provided with a connecting rib hole (15), through which the connecting rib (5) passes, and the inner diameter of the connecting rib hole (15) is greater than the outer diameter of the connecting rib (5).

8. The precast concrete column dry connection node according to claim 1, characterized in that: The horizontal projection shape and outer dimensions of the connecting bottom plate (11) and the sealing mortar plate (14) are consistent with the cross section of the prefabricated column (6); The connecting plate (13) is a panel with a cavity inside, and the outer shape of the connecting plate (13) is consistent with the cross section of the prefabricated column (6), and the outer dimension is smaller than the cross section of the prefabricated column (6); The sealing plate (14) is provided with a connecting plate hole (16), through which the connecting plate (13) passes, and the inner dimension of the connecting plate hole (16) is greater than the outer dimension of the connecting plate (13).

9. The precast concrete column dry connection node according to claim 1, characterized in that: Stiffening ribs (12) are arranged around the connecting plate (13), the bottom of the stiffening ribs (12) is connected to the connecting bottom plate (11), and the plane shape of the stiffening ribs (12) is a right-angled trapezoid that is short at the top and long at the bottom.

10. A method for dry connection of precast concrete columns, characterized in that: The method uses the node according to any one of claims 1 to 9 to perform dry connection of precast concrete columns, comprising the following steps: S1, manufacturing a connecting bottom plate (11), a stiffening rib (12), a connecting plate (13) and a slurry sealing plate (14), welding them into a whole, or integrally casting them, and assembling them into a connecting body (1); S2, processing the connecting ribs (5) and the stirrups (10), tapping the top ends of the connecting ribs (5), and assembling the connecting ribs (5) and the stirrups (10) into a steel skeleton; S3, welding the connector (1) and the steel frame to form a combined body, wherein the connecting ribs (5) and the connecting plate (13) are connected by lap welding; S4, assembling the assembly into a mold of a prefabricated column (6), casting the prefabricated column (6), and curing; S5, the height adjustment nut (2) is installed to the top of the connecting rib (5) of the prefabricated column (6); S6, installing the sealing strip (7), and pouring the seat slurry (8) into the inner cavity surrounded by the sealing strip (7); S7, hoisting the prefabricated column (6), aligning the connection rib hole (15) of the connector (1) and the connection rib (5) of the prefabricated column (6), and then dropping the prefabricated column (6); S8, installing the connecting nut (3) at the connecting rib (5) where the height adjustment nut (2) is installed, and the column top hook is unhooked after the installation torque of the connecting nut (3) reaches the requirement; S9. After the seat slurry (8) is cured, install the remaining connection nuts (3) and the locking nut (4), and the connection is completed.

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