Precast concrete column with steel ring splicing steel pipe connection and connecting structure of precast concrete column

Abstract

The utility model discloses a precast concrete column with steel ring spliced steel pipe connection and a connecting structure thereof, the precast concrete column comprises a solid column body, a steel pipe and a stirrup are pre-buried in the solid column body, the steel pipe extends along the length direction of the solid column body, the steel pipe is composed of at least two steel pipe sections and a steel ring, and the steel ring is connected with the steel pipe sections. And the steel pipe section and the steel ring are welded together. During connection, connecting steel bars partially penetrating into the steel pipes are arranged at the upper ends and the lower ends of the prefabricated concrete columns, grouting materials are poured into the steel pipes, and the connecting steel bars at the lower ends of the prefabricated concrete columns are connected with a foundation or penetrate through beam-column connecting joints to be anchored into the steel pipes of the lower-layer prefabricated concrete columns. The connecting steel bars at the upper ends of the prefabricated concrete columns penetrate through the beam column connecting joints and are anchored into the steel pipes of the prefabricated concrete columns on the upper layer or connected with the beam column connecting joint on the uppermost layer. The utility model has the advantages of simple production process, convenience in transportation and construction, low installation error-tolerant rate, high construction efficiency, low construction cost and good anti-seismic property, and improves the standardization degree.

Description

TECHNICAL FIELD

[0001] The utility model relates to prefabricated concrete building structure technology, especially a prefabricated concrete column with steel ring splicing steel pipe connection, and further relates to a connecting structure comprising the prefabricated concrete column. BACKGROUND

[0002] Prefabricated concrete structures have been widely used in modern buildings due to their fast construction speed, controllable quality, environmental protection and other advantages. However, the connection between prefabricated concrete components has always been a key technical problem restricting its development.

[0003] Among them, the connection of prefabricated concrete columns is involved. The traditional prefabricated concrete column is connected by a grouting sleeve embedded in the bottom end of the column to connect the longitudinal reinforcement of the upper and lower layers. This connection method is widely used in the assembly connection of prefabricated concrete columns. However, this connection method is complex to construct, and the grouting connection of the grouting sleeve requires precise alignment and grouting operation, which is tedious in the construction process and difficult to control the quality. Due to the complexity of construction, the comprehensive cost of the traditional prefabricated concrete column is relatively high, which limits its wide application.

[0004] To solve the above problems, the utility model provides a prefabricated concrete column with steel ring welding steel pipe connection and its connecting structure, which can simplify the construction process and has important engineering significance. UTILITY MODEL CONTENTS

[0005] The first object of the utility model is to provide a prefabricated concrete column with steel ring splicing steel pipe connection.

[0006] The second object of the utility model is to provide a connecting structure of the prefabricated concrete column.

[0007] The first object of the utility model is realized by the following technical solutions:

[0008] A prefabricated concrete column with steel ring splicing steel pipe connection, comprising a solid column body, characterized in that: a steel pipe and a stirrup connecting the steel pipe are embedded in the solid column body, the steel pipe is distributed around the solid column body, and the steel pipe extends along the length direction of the solid column body and penetrates through the solid column body, the steel pipe is composed of at least two steel pipe sections and a steel ring arranged between adjacent steel pipe sections, the steel pipe section and the steel ring are welded together, the inner ring part of the steel ring protrudes to the inner side of the steel pipe, and the stirrup is distributed along the length direction of the solid column body at intervals.

[0009] The further technical solution of the utility model is that: the steel pipe section includes a long steel pipe section and short steel pipe sections connected at both ends of the long steel pipe section, and the steel ring is distributed at both ends of the steel pipe.

[0010] The further technical solution of the utility model is that: the two end faces of the steel pipe are flush with the two end faces of the solid column body.

[0011] The further technical scheme of the utility model discloses: the cross section shape of solid column is circular, square or rectangle.

[0012] The further technical scheme of the utility model discloses: the cross section shape of steel pipe is circular, square or rectangle.

[0013] The further technical scheme of the utility model discloses: steel pipe is located in the inside of stirrup, and stirrup and steel pipe are tied together.

[0014] The second purpose of the utility model is realized through the following technical scheme:

[0015] A connecting structure of the prefabricated concrete column, characterized in that: connecting steel bars are arranged at the upper and lower ends of the prefabricated concrete column respectively corresponding to each steel pipe, part of the connecting steel bars penetrates into the steel pipe, and grouting material is poured into the steel pipe, and the connecting steel bars are connected through the grouting material, wherein the connecting steel bar at the lower end of the prefabricated concrete column is connected with the foundation, or penetrates through the beam-column connecting joint and is anchored into the steel pipe of the lower prefabricated concrete column for connection, the connecting steel bar at the upper end of the prefabricated concrete column penetrates through the beam-column connecting joint and is anchored into the steel pipe of the upper prefabricated concrete column for connection, or is connected with the uppermost beam-column connecting joint.

[0016] The further technical scheme of the utility model discloses: the lower end surface of prefabricated concrete column is equipped with the grout setting layer between foundation or floor.

[0017] The further technical scheme of the utility model discloses: beam-column connecting joint is cast-in-place concrete joint.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) the prefabricated concrete column of the utility model only needs to pour grouting material in the steel pipe with a steel ring to realize connection when assembling on site, reduces the on-site wet work, is more green and environmental protection, shortens the construction period simultaneously, and further improves the construction efficiency.

[0020] (2) the steel pipe and the stirrup of the prefabricated concrete column of the utility model are pre-buried inside and not exposed, which not only reduces the space occupied by the prefabricated concrete column during transportation, protects the column body from being damaged, but also simplifies the hoisting operation of the prefabricated concrete column during construction, and ensures the safety and reliability of construction.

[0021] (3) the steel pipe of the utility model is composed of steel pipe sections and steel rings welded between adjacent steel pipe sections, the inner ring part of the steel ring protrudes to the inside of the steel pipe, and the steel ring can effectively limit the grouting material in the steel pipe from slipping in the steel pipe, thereby improving the anti-slippage performance of the overall structure.

[0022] (4) The utility model discloses a steel pipe connection, and the steel pipe has a relatively large diameter, which avoids the problems of difficult alignment and poor grouting in traditional sleeve connection, and improves the reliability of construction quality.

[0023] (5) The utility model discloses a steel pipe is embedded in the prefabricated concrete column, and hoop reinforcement is connected to the outer periphery of the steel pipe, the existence of the steel pipe can provide additional strength and stability, and the hoop reinforcement can constrain and fix the steel pipe, and the steel pipe forms a reinforced cage to bear stress together with concrete, which enhances the shear strength, the connection between the steel pipe and the column body and the overall rigidity, and improves the ductility of the prefabricated concrete column.

[0024] (6) The utility model discloses a steel pipe is embedded in the prefabricated concrete column, and hoop reinforcement is connected to the outer periphery of the steel pipe, the existence of the steel pipe can provide additional strength and stability, and the hoop reinforcement can constrain and fix the steel pipe, and the steel pipe forms a reinforced cage to bear stress together with concrete, which enhances the shear strength, the connection between the steel pipe and the column body and the overall rigidity, and improves the ductility of the prefabricated concrete column.

[0025] (7) The prefabricated concrete column with a steel pipe connection is simple to manufacture, safe and reliable, has a low fault tolerance rate in construction and installation, the steel pipe has strong compression resistance, and is suitable for large load and industrial buildings.

[0026] (8) The prefabricated concrete column and the connecting structure can better realize standardized design, are convenient for large-scale production and on-site assembly, and improve the industrialization level of buildings.

[0027] (9) The utility model can be applied to cast-in-place structures and assembly systems, and is suitable for bottom columns, middle columns and upper columns.

[0028] (10) The connecting structure is anchored in the beam-column connection joint through the connecting steel bars anchored in the steel pipe of the prefabricated concrete column, and the structure is connected, the connecting mode is simple and flexible, and is suitable for wide promotion and use. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a longitudinal sectional view of the prefabricated concrete column of the utility model embodiment;

[0030] Figure 2 is a transverse sectional view of the prefabricated concrete column of the utility model embodiment;

[0031] Figure 3 is Figure 2 is a partial enlarged view of A in the middle;

[0032] Figure 4 is a longitudinal sectional view of the connecting structure when connecting upper and lower prefabricated concrete columns of the utility model embodiment;

[0033] Figure 5is a longitudinal section schematic view of the connecting structure in bottom layer assembly of the embodiment of the utility model;

[0034] Figure 6 is a longitudinal section schematic view of the connecting structure in middle layer structure assembly of the embodiment of the utility model;

[0035] Figure 7 is a longitudinal section schematic view of the connecting structure in top layer structure assembly of the embodiment of the utility model.

[0036] Figure mark meaning:

[0037] 1-solid column; 2-steel pipe; 2.1-long steel pipe section; 2.2-short steel pipe section; 3-steel ring; 4-grouting material; 5-connection steel bar; 6-stirrup; 7-structural beam; 8-grouting layer; 9-lower layer prefabricated concrete column; 10-upper layer prefabricated concrete column; 11-beam column connecting joint; 12-foundation. DETAILED DESCRIPTION

[0038] The utility model is further described below in combination with embodiments.

[0039] Embodiment:

[0040] As Figures 1-3 shown is a prefabricated concrete column with steel ring splicing steel pipe connection of the embodiment, which is prefabricated in factory and assembled on site, comprising solid column 1, the material of solid column 1 can adopt ordinary concrete, high-strength concrete, high-performance concrete, super high-performance concrete, and can be flexibly selected according to engineering stress requirement.

[0041] In the embodiment, the cross-sectional shape of solid column 1 is square, and in other embodiments, the cross-sectional shape of solid column 1 can also be circular or rectangular, etc. Eight steel pipes 2 are embedded in solid column 1, and the cross-sectional shape of steel pipe 2 is circular, and in other embodiments, the cross-sectional shape of steel pipe 2 can also be square or rectangular, etc. Eight steel pipes 2 are distributed equidistantly on the four edges of solid column 1, and steel pipe 2 extends along the length direction of solid column 1 and penetrates solid column 1, but the two ends of steel pipe 2 do not protrude from the two end faces of solid column 1, and preferably, the two end faces of steel pipe 2 are flush with the two end faces of solid column 1.

[0042] The steel pipe 2 of the embodiment is composed of one long steel pipe segment 2.1, six short steel pipe segments 2.2 and steel rings 3 arranged between adjacent steel pipe segments. Three short steel pipe segments 2.2 are arranged at both ends of the long steel pipe segment 2.1 respectively. The steel pipe segments and the steel rings 3 are welded together. The steel pipe segments are connected in sequence through the steel rings 3 to form a complete steel pipe 2. The holes between the steel pipe segments are connected. The outer diameter of the steel ring 3 is basically equal to the outer diameter of the steel pipe 2. The welding part adopts full welding or fillet welding to ensure the connection strength. Moreover, the inner ring part of the steel ring 3 protrudes to the inner side of the steel pipe 2. The steel ring 3 can effectively limit the slip of the grouting material 4 in the steel pipe 2, thereby improving the anti-slip performance of the overall structure.

[0043] The steel rings 3 of the embodiment are distributed at both ends of the steel pipe 2, which can achieve better anti-slip effect. The specific position and number of the steel rings 3 can be determined according to the height and stress condition of the precast concrete column to achieve the best anti-slip effect.

[0044] The thickness of the steel ring 3 is 5-15 mm. The outer diameter of the steel pipe 2 is 50-200 mm, and the wall thickness is 3-10 mm. The specific size is determined according to the specific engineering requirement, application scene and connection mode.

[0045] The hole diameter of the steel pipe 2 of the embodiment is 80 mm. The hole diameter of the steel pipe 2 can be adjusted according to the engineering stress. When the cross section of the solid column 1 is small, the hole diameter of the steel pipe 2 can be reduced. When the cross section of the solid column 1 is large, the hole diameter of the steel pipe 2 can be increased.

[0046] A plurality of stirrups 6 are also embedded in the solid column 1. The stirrups 6 pass around the outer side of the steel pipe 2 and are tied together with the steel pipe 2. The plurality of stirrups 6 are distributed along the length direction of the solid column 1 at intervals. The stirrups 6 and the steel pipe 2 constitute the steel framework of the precast concrete column. Figure 2 In the embodiment, the stirrups 6 are tied on the outer side of the steel pipe 2.

[0047] The embodiment also discloses a connection structure of the precast concrete column connected by the steel ring spliced steel pipe. Connection steels 5 are arranged at the upper and lower ends of the precast concrete column respectively corresponding to each steel pipe 2. Part of the connection steels 5 penetrates into the steel pipe 2. The grouting material 4 is grouted in the steel pipe 2 to realize the connection of the connection steels 5. The connection steel 5 at the lower end of the precast concrete column is connected with the foundation 12 or penetrates through the beam-column connection joint 11 and is anchored into the steel pipe 2 of the lower precast concrete column 9 to realize the connection. The connection steel 5 at the upper end of the precast concrete column penetrates through the beam-column connection joint 11 and is anchored into the steel pipe 2 of the upper precast concrete column 10 to realize the connection or is connected with the uppermost beam-column connection joint 11. The beam-column connection joint 11 can be a cast-in-place concrete joint.

[0048] The diameter and length of the connecting steel bars 5 are determined according to the engineering stress and need to meet the anchoring requirements, and the end of the connecting steel bars 5 connected with the foundation 12 or the beam-column connecting joint 11 of the uppermost layer is vertically bent. A seat grouting layer 8 is arranged between the lower end surface of the prefabricated concrete column and the foundation 12 or the floor, and the load is transmitted through the seat grouting layer 8, and the seat grouting layer 8 adopts seat grouting material or high-strength adhesive. The grouting material 4 used can be ordinary grouting material, high-strength grouting material, or high-strength non-shrinkage grouting material, etc.

[0049] As shown in Figure 4 , the connecting structure when the upper and lower layer columns are connected in the embodiment, including the structural beam 7, the upper layer prefabricated concrete column 10 and the lower layer prefabricated concrete column 9, the structural beam 7, the upper layer prefabricated concrete column 10 and the lower layer prefabricated concrete column 9 are connected through the beam-column connecting joint 11 cast in situ, and the seat grouting layer 8 is arranged between the lower end surface of the upper layer prefabricated concrete column 10 and the floor. The steel pipes 2 of the upper layer prefabricated concrete column 10 and the lower layer prefabricated concrete column 9 are vertically aligned, and the grouting material 4 is filled. The connecting steel bars 5 pass through the beam-column connecting joint 11, the two ends of the connecting steel bars 5 are respectively anchored into the steel pipes 2 of the upper layer prefabricated concrete column 10 and the lower layer prefabricated concrete column 9, and the connecting steel bars 5 do not penetrate the steel pipes 2.

[0050] The following is a specific construction process of the connecting structure of the embodiment:

[0051] Step 1: As shown in Figure 5 , the construction of the bottom layer column is carried out, the installation position of the prefabricated concrete column is determined on the foundation 12, a temporary fixing frame is erected near the installation position, then a 20mm thick seat grouting material is laid on the foundation 12, the prefabricated concrete column is hoisted to the installation position, the seat grouting material forms the seat grouting layer 8, and the prefabricated concrete column is temporarily fixed. When the prefabricated concrete column is assembled on the foundation 12, the connecting steel bars 5 connected with the prefabricated concrete column should be reserved when the steel bars of the foundation 12 are tied, and the top end of the connecting steel bars 5 extends to the surface of the foundation 12 and is inserted into the steel pipe 2. After the prefabricated concrete column is installed in place, the grouting material 4 is poured into the steel pipe 2, and the connecting steel bars 5 at the upper end are inserted into the steel pipe 2 at the upper end of the prefabricated concrete column, and the installation of the lowest layer prefabricated concrete column is completed.

[0052] Step 2: As shown in Figure 6The diagram shows the construction of the intermediate layer columns. After the lower layer precast concrete column 9 is completed, the structural beam 7 is installed, forming a beam-column connection node 11 between the beam and the column. The connecting steel bar 5 passes through the beam-column connection node 11 and extends to the top of the floor. The beam-column connection node 11 is formed by on-site casting. After the on-site cast concrete reaches a certain strength, the upper layer precast concrete column 10 is hoisted to the position with the extended connecting steel bar 5. The extended part of the connecting steel bar 5 is inserted into the steel pipe 2 of the upper layer precast concrete column 10. Then, grout 4 is injected into the steel pipe 2, and then the connecting steel bar 5 at the top of the upper layer precast concrete column 10 is inserted.

[0053] During construction, the above steps are repeated from bottom to top to assemble the components layer by layer.

[0054] Step 3: As Figure 7 The diagram shows the construction of the top-level column. When the assembly construction reaches the top layer, the connecting steel bar 5 at the top end of the precast concrete column of the top layer extends into the beam-column connection node of the top layer. The top of the connecting steel bar 5 does not extend beyond the beam-column connection node of the top layer, and the upper end of the connecting steel bar 5 is vertically bent and anchored into the beam-column connection node of the top layer.

[0055] The above construction process for connection structures is applicable to the construction of the bottom, middle and top floors of prefabricated buildings.

[0056] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A precast concrete column with steel ring splicing and steel pipe connection, comprising a solid column body, characterized in that: Steel pipes and stirrups connecting the steel pipes are pre-embedded in the solid column. The steel pipes are distributed around the perimeter of the solid column and extend along the length of the solid column and penetrate the solid column. Each steel pipe consists of at least two steel pipe segments and a steel ring disposed between adjacent steel pipe segments. The steel pipe segments and the steel rings are welded together. The inner ring portion of the steel ring protrudes to the inner side of the steel pipe. The stirrups are distributed at intervals along the length of the solid column.

2. The precast concrete column with steel pipe splicing and connection according to claim 1, characterized in that: The steel pipe section includes a continuous long steel pipe section and short steel pipe sections connected to both ends of the long steel pipe section, and the steel rings are distributed at both ends of the steel pipe.

3. The precast concrete column with steel pipe splicing and connection according to claim 1, characterized in that: The two ends of the steel pipe are flush with the two ends of the solid column.

4. The precast concrete column with steel pipe splicing and connection according to claim 1, characterized in that: The solid column has a circular, square, or rectangular cross-sectional shape.

5. The precast concrete column with steel pipe splicing and connection according to claim 1, characterized in that: The cross-sectional shape of the steel pipe is circular, square, or rectangular.

6. The precast concrete column with steel pipe splicing and connection according to claim 1, characterized in that: The steel pipe is located inside the stirrup, and the stirrup is tied to the steel pipe.

7. A connection structure for a precast concrete column as described in any one of claims 1 to 6, characterized in that: Connecting reinforcing bars are provided at both the upper and lower ends of the precast concrete column, corresponding to each of the steel pipes. Part of the connecting reinforcing bars is inserted into the steel pipes, and grout is injected into the steel pipes to connect the connecting reinforcing bars. The connecting reinforcing bars at the lower end of the precast concrete column are connected to the foundation, or pass through the beam-column connection node and are anchored into the steel pipe of the lower precast concrete column for connection. The connecting reinforcing bars at the upper end of the precast concrete column pass through the beam-column connection node and are anchored into the steel pipe of the upper precast concrete column for connection, or are connected to the uppermost beam-column connection node.

8. The connection structure according to claim 7, characterized in that: A grouting layer is provided between the lower end of the precast concrete column and the foundation or floor.

9. The connection structure according to claim 7, characterized in that: The beam-column connection node is a cast-in-place concrete node.

Images