Connection and rapid construction method for underground steel pipe concrete column and upper steel reinforced concrete column

Abstract

The invention discloses a connection and rapid construction method of an underground steel pipe concrete column and an upper steel reinforced concrete column. The connection comprises a steel pipe concrete column, a steel reinforced concrete column, a steel reinforced concrete beam and a prestressed steel reinforced concrete beam, areas among the underground concrete filled steel tubular columns, the overground steel reinforced concrete columns, the steel reinforced concrete beams and the prestressed steel reinforced concrete beams are node connecting areas; the node connection area comprises a core area and a node area, and the core area comprises a core area formed by enclosing and a node area fixedly connected with the core area; the rapid construction method comprises the following steps that the steel reinforced concrete steel framework and the steel tube concrete steel tube framework are welded; quick connection of the overall connection nodes is carried out; concrete pouring is conducted; and filling the holes at the perforation positions of the reinforcing steel bars and the prestressed reinforcing steel bars to finish construction. The rigidity and durability of the connecting joint are guaranteed, and the construction speed is increased.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rigid connection nodes, and particularly relates to a connection and rapid construction method of an underground steel pipe concrete column and an upper steel reinforced concrete column. BACKGROUND

[0002] With the rapid development of super-large and large-span integrated structures on the ground and underground, combined structures such as steel pipe concrete columns and steel reinforced concrete columns are widely used in structural systems. Steel pipe concrete columns become the first choice for underground large-span structures due to their balanced advantages of bearing capacity and construction convenience. Steel reinforced concrete columns are widely used in large-span structures on the ground due to their advantages in ductility and seismic performance.

[0003] In structure systems with different functions on the upper and lower parts such as air-rail hubs, steel reinforced concrete columns are often used to achieve architectural effects on the ground, and steel pipe concrete columns are needed to bear the large vertical load on the upper part. In the prior art, when connecting steel reinforced concrete columns and steel pipe concrete columns, the lower steel pipe concrete column is usually extended to the outside of the beam-column joint, and the steel in the upper steel reinforced concrete column is anchored into the extended section of the lower steel pipe concrete column. However, when dealing with integrated structures on the ground and underground, the following problems exist: the extension of the underground steel pipe concrete column to the outside of the beam-column joint blocks the upper beam reinforcement, which requires additional connecting components and increases the construction difficulty; when the external environment is underground soil and water, the durability of the steel pipe is difficult to guarantee; when the load is large, the anchoring length of the upper steel reinforced concrete column in the steel pipe concrete column needs to be very long, and it is difficult to ensure the rigidity of the connection joint.

[0004] Therefore, it is necessary to study a rigid integral connection joint of an underground steel pipe concrete column and an upper steel reinforced concrete column and a rapid construction method thereof to solve the above problems and promote the development of integrated structures with different functions on the ground and underground. SUMMARY

[0005] The present application is proposed to solve the problems in the prior art, and the purpose is to provide a connection and rapid construction method of an underground steel pipe concrete column and an upper steel reinforced concrete column.

[0006] The technical scheme of the present application is: a connection of an underground steel pipe concrete column and an upper steel reinforced concrete column, comprising a steel pipe concrete column, a steel reinforced concrete column, a steel reinforced concrete beam, and a prestressed steel reinforced concrete beam. The area between the underground steel pipe concrete column, the upper steel reinforced concrete column, the steel reinforced concrete beam, and the prestressed steel reinforced concrete beam is a joint connection area. The joint connection area includes a core area and a joint area. The core area includes a closed core area and a fixedly connected joint area. The core area and the joint area are integrally poured and formed.

[0007] Further, the core area is formed by the underground steel pipe concrete column and the prestressed steel reinforced concrete beam and the steel reinforced concrete beam.

[0008] Further, the area from the lower end surface of the steel reinforced concrete column body to the upper end surface of the steel pipe concrete column is a node area.

[0009] Further, the steel pipe concrete column comprises a steel pipe concrete column body and a steel pipe concrete steel pipe framework, the steel pipe concrete steel pipe framework is provided with vertical partitions and horizontal partitions, the vertical partitions vertically divide the internal space, and the horizontal partitions horizontally divide the internal space.

[0010] Further, the steel pipe concrete steel pipe framework is provided with studs at the inner and outer walls, and the outer wall of the steel pipe concrete steel pipe framework is further provided with a connecting reinforcing sleeve.

[0011] Further, the steel reinforced concrete column comprises a steel reinforced concrete column body and a steel reinforced concrete steel framework, and the steel reinforced concrete column body is provided with a steel column horizontal partition.

[0012] Further, a plurality of upper steel vertical reinforcements are arranged at the four positions in the steel reinforced concrete column, the upper steel vertical reinforcements are connected with the horizontal partitions in the steel pipe concrete column after penetrating through the steel column horizontal partition.

[0013] Further, the steel reinforced concrete steel framework protrudes out of the steel reinforced concrete column body and is connected with the steel pipe concrete steel framework at the protruding end.

[0014] Further, the steel reinforced concrete steel framework is provided with studs at the outer wall.

[0015] A quick construction method for connecting an underground steel pipe concrete column and an upper steel reinforced concrete column comprises the following steps: A. welding a steel reinforced concrete steel framework and a steel pipe concrete steel framework; B. performing quick connection of the overall connection node; C. after the formwork construction is completed, performing concrete pouring; D. plugging the holes at the positions of the steel bars and the prestressed steel bars, and completing the overall construction.

[0016] The beneficial effects of the present application are as follows: The present application improves the durability of the connection between the underground steel pipe concrete column and the steel reinforced concrete column through the node connection area, and improves the rigid connection stress through the welding of the steel reinforced concrete steel framework and the steel pipe concrete steel framework and the upper steel vertical reinforcement.

[0017] The present invention realizes rapid construction of the node connection area through welding of steel-concrete-steel skeleton and steel-tube concrete-steel skeleton and integrated casting and forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic plan view of the underground steel tube concrete column in the present invention; Figure 2 It is a schematic plan view of a medium steel-concrete column of the present invention; Figure 3 is a planar schematic diagram of the node connection area in the present invention; Figure 4 is a schematic cross-sectional view of a node connection region in the present invention; Figure 5 It is a schematic diagram of the string tube in the present invention; Among them: 1. Grouting hole; 2. Steel tube plate; 3. Vertical partition; 4. Exhaust hole; 5. Horizontal partition; 6. Stud; 7. Flange steel plate; 8. Cross steel frame; 9. Steel column horizontal partition; 11. Steel tube concrete column; 12. Steel concrete beam; 13. Ring beam waist reinforcement; 14. First connecting plate; 15. Second connecting plate; 16. Upper steel vertical reinforcement; 17. Steel concrete column; 18. Structural reinforcement; 19. Stirrups; 20. Prestressed steel concrete beam; 21. Concrete ring beam; 22. Stud; 23. Steel sleeve; 24. Steel tube concrete column; 25. Steel concrete column; 26. Steel tube concrete steel tube frame; 27. Steel concrete steel frame; 28. Steel beam longitudinal reinforcement. DETAILED DESCRIPTION

[0019] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 5 As shown, a connection between an underground steel tube concrete column and an upper steel concrete column includes a steel tube concrete column 11, a steel concrete column 17, a steel concrete beam 12, and a prestressed steel concrete beam 20. The area between the underground steel tube concrete column 11, the above-ground steel concrete column 17, the steel concrete beam 12, and the prestressed steel concrete beam 20 is a node connection area; the node connection area includes a core area and a node area, and the core area includes an enclosed core area and a connected and fixed node area, and the core area and the node area are cast in an integrated manner.

[0020] The core area is formed by underground steel tube concrete columns 11 and prestressed steel concrete beams 20 and steel concrete beams 12.

[0021] The area from the lower end surface of the steel concrete column 25 in the steel concrete column 17 to the upper end surface of the steel tube concrete column 11 is the node area.

[0022] The steel pipe concrete column 11 comprises a steel pipe concrete column body 24 and a steel pipe concrete steel pipe framework 26, the steel pipe concrete steel pipe framework 26 is internally provided with vertical partition plates 3 and horizontal partition plates 5, the vertical partition plates 3 vertically divide the internal space, and the horizontal partition plates 5 horizontally divide the internal space.

[0023] The steel pipe concrete steel pipe framework 26 is externally provided with a plurality of studs 6, and the outer wall of the steel pipe concrete steel pipe framework 26 is further provided with a connecting reinforcing sleeve 23.

[0024] The steel pipe concrete column 11 comprises a steel pipe concrete column body 24 and a steel pipe concrete steel pipe framework 26, the steel pipe concrete steel pipe framework 26 is internally provided with vertical partition plates 3 and horizontal partition plates 5, the vertical partition plates 3 vertically divide the internal space, and the horizontal partition plates 5 horizontally divide the internal space.

[0025] The steel pipe concrete column 11 comprises a steel pipe concrete column body 24 and a steel pipe concrete steel pipe framework 26, the steel pipe concrete steel pipe framework 26 is internally provided with vertical partition plates 3 and horizontal partition plates 5, the vertical partition plates 3 vertically divide the internal space, and the horizontal partition plates 5 horizontally divide the internal space.

[0026] The steel pipe concrete column 11 comprises a steel pipe concrete column body 24 and a steel pipe concrete steel pipe framework 26, the steel pipe concrete steel pipe framework 26 is internally provided with vertical partition plates 3 and horizontal partition plates 5, the vertical partition plates 3 vertically divide the internal space, and the horizontal partition plates 5 horizontally divide the internal space.

[0027] The steel pipe concrete column 11 comprises a steel pipe concrete column body 24 and a steel pipe concrete steel pipe framework 26, the steel pipe concrete steel pipe framework 26 is internally provided with vertical partition plates 3 and horizontal partition plates 5, the vertical partition plates 3 vertically divide the internal space, and the horizontal partition plates 5 horizontally divide the internal space.

[0028] Specifically, as shown in Figure 1 The grouting holes 1, the steel pipe plates 2, the vertical partition plates 3, the exhaust holes 4, the horizontal partition plates 5, the studs 6, the steel pipe concrete column body 24 and the steel pipe concrete steel pipe framework 26 are connected, the vertical partition plates 3 are in a cross structure, the vertical partition plates 3 vertically divide the internal space of the steel pipe concrete steel pipe framework 26, and the horizontal partition plates 5 are consistent with the inner contour shape of the steel pipe concrete steel pipe framework 26 and horizontally divide the internal space.

[0029] Specifically, the horizontal partition plates 5 are provided with the grouting holes 1 for grouting and the exhaust holes 4 for exhausting during grouting.

[0030] Specifically, as shown in Figure 2 The flange steel plates 7, the cross steel bones 8, the steel column horizontal partition plates 9, the steel pipe concrete column body 25, the steel pipe concrete steel pipe framework 27 and the steel beam longitudinal steel bars 28 are connected, the side walls of the cross steel bones 8 are connected with the flange steel plates 7, the flange steel plates 7 are externally provided with the studs 6 for connection, and the steel column horizontal partition plates 9 and the steel beam longitudinal steel bars 28 are arranged in the steel pipe concrete column body 25.

[0031] Specifically, as shown in Figures 3 to 4The connection of the steel pipe concrete column 11, the steel reinforced concrete column 17, the steel reinforced concrete beam 12 and the prestressed steel reinforced concrete beam 20 is illustrated in plane and section.

[0032] Specifically, the upper part of the steel reinforced concrete column 17 is provided with vertical steel bars 16 with a diameter of d at four positions.

[0033] Specifically, the steel pipe concrete column 11 is provided with a horizontal partition plate 5 at the lower surface of the extended part of the upper part of the vertical steel bars 16.

[0034] Specifically, the horizontal partition plate 5 is located at the position of the steel bars in the steel reinforced concrete beam 12 or the prestressed steel reinforced concrete beam 20.

[0035] Specifically, the length of the steel reinforced concrete steel framework 27 extending out of the lower surface of the steel reinforced concrete column body 25 is determined by stress calculation.

[0036] Specifically, the extended part of the steel reinforced concrete steel framework 27 intersects with the vertical partition plate 3 of the steel pipe concrete column 11 and cuts in, and correspondingly, the steel pipe concrete column 11 is provided with a horizontal partition plate 5 at the lower surface of the extended part of the steel reinforced concrete steel framework 27.

[0037] More specifically, the extended part of the steel reinforced concrete steel framework 27 and the vertical partition plate 3 and the horizontal partition plate 5 of the steel pipe concrete column 11 are connected by welding.

[0038] Specifically, the upper part of the vertical steel bars 16 is welded into the horizontal partition plate 5 of the steel pipe concrete column 11.

[0039] Specifically, the horizontal partition plate 5 is provided with grouting holes 1 and exhaust holes 4 that meet the construction requirements, and the joint connection area of the steel pipe concrete column 11, the steel reinforced concrete column 17, the prestressed steel reinforced concrete beam 20 and the steel reinforced concrete beam 17 is formed by pouring through the grouting holes 1.

[0040] Specifically, the steel in the prestressed steel reinforced concrete beam 20 and the steel reinforced concrete beam 12 is connected to the rectangular large-size steel pipe plate 2 outside the underground steel pipe concrete column 11 by welding.

[0041] Specifically, the steel beam longitudinal reinforcement 28 in the prestressed steel reinforced concrete beam 20 and the steel reinforced concrete beam 21 is connected to the steel bar sleeve 23 outside the underground steel pipe concrete column 11 by welding.

[0042] Specifically, the steel pipe concrete column 11 outside the joint connection area is provided with multiple rows of ring beam waist muscles 13 with different diameters.

[0043] Specifically, the node connecting area is provided with a concrete ring beam 21.

[0044] Specifically, the node connecting area is provided with vertical stirrups 19 and construction steel bars 18 at four corners.

[0045] Specifically, the diameter of the concrete ring beam 21 should be the minimum diameter that can accommodate the concrete-filled steel tube column 11, the ring beam waist rib 13 and the stirrup 19.

[0046] Specifically, the ring beam waist rib 13 is vertically distributed in the concrete ring beam 21, and the ring beam waist rib 13 is welded to the first connecting plate 14 of the prestressed steel reinforced concrete beam or the steel reinforced concrete beam.

[0047] Similarly, the second connecting plate 15 is located inside the first connecting plate 14, and the second connecting plate 15 connects the ring beam waist rib 13 of the steel reinforced concrete beam or the prestressed steel reinforced concrete beam.

[0048] A rapid construction method for connecting an underground concrete-filled steel tube column with an upper steel reinforced concrete column, comprising the following steps: A. welding a steel reinforced concrete steel skeleton 27 and a concrete-filled steel tube skeleton 26; B. performing rapid connection of the overall connecting node; C. after the formwork construction is completed, pouring concrete; D. filling the holes at the positions of the steel bars and the prestressed steel bars, and completing the overall construction.

[0049] Specifically, step A of welding the steel reinforced concrete steel skeleton 27 and the concrete-filled steel tube skeleton 26 has the following specific process: The steel reinforced concrete steel skeleton 27 and the concrete-filled steel tube skeleton 26 are welded using a V-shaped groove, a full penetration first-class weld, and are welded into one body in a factory.

[0050] Specifically, step B of performing rapid connection of the overall connecting node has the following specific process: First, hoist the integrated node structure of the steel reinforced concrete steel skeleton 27 and the concrete-filled steel tube skeleton 26, and install it on the constructed concrete-filled steel tube column; Then, bind the node steel bars; Next, when the upper steel vertical steel bars 16 are connected with the cross partition plate 5, a steel bar hole is opened in the plate, the hole position is reinforced using double-sided welded steel plates, and the upper steel vertical steel bars 16 are connected with the lower cross partition plate 5 after passing through the steel bar hole; Finally, when the steel bars of the steel reinforced concrete beam 12 or the prestressed steel reinforced concrete beam 20 are connected with the concrete-filled steel tube skeleton 26 using a steel bar sleeve 23, the sleeve grade is the same as the steel bar grade, and a full penetration first-class weld is used.

[0051] Specifically, after the formwork construction in step C is completed, concrete pouring is carried out. The specific process is as follows: First, before pouring concrete, vibrators are placed at the four corners of the steel tube concrete column 11 to the bottom of the column; Then, pull the rod upwards according to the pouring height to prevent the vibrating rod from not reaching the bottom during pouring, resulting in loose vibration. Then, a long string tube is inserted through the pouring hole of the grouting hole 1. The string tube is a steel pipe with a diameter of 100-150mm and a trumpet-shaped enlarged top. Finally, pour 4 to 8 meters long for the first time. After pouring until the string tube is buried to a depth of 0.5 to 1 meter, pull out the long string tube and replace it with a shorter one to ensure that the free fall height of the concrete pouring does not exceed 2 meters to prevent aggregate separation.

[0052] Specifically, in step D, the holes at the perforated locations of the steel bars and prestressed steel bars are plugged to complete the overall construction. The specific process is as follows: First, the holes of steel bars and prestressed steel bars should be sealed with wire mesh and mortar. Special attention should be paid to the gaps between the steel bars and prestressed steel bars at the bottom of the beam. They should be sealed in time with the progress of steel bar tying to avoid inoperability after the stirrups are tied. Then, after the filling is completed, the steel bars are welded on the outside to fix it. After the mortar has reached a certain strength, the self-compacting concrete can be poured into the steel pipe column to avoid the self-compacting concrete from overflowing and leaking, which may cause gouging inside the beam.

[0053] The present invention improves the durability of the connection between the underground steel tube concrete column and the steel concrete column through the node connection area, and improves the rigid connection force through the steel concrete steel frame, the steel tube concrete steel pipe frame welding and the upper steel vertical reinforcement.

[0054] The present invention realizes rapid construction of the node connection area through welding of steel-concrete-steel skeleton and steel-tube concrete-steel skeleton and integrated casting and forming.

Claims

1. A connection between an underground steel tube concrete column and an upper section steel concrete column, comprising a steel tube concrete column (11), a section steel concrete column (17), a section steel concrete beam (12), and a prestressed section steel concrete beam (20), characterized in that: The area between the underground steel tube concrete column (11), the above-ground steel concrete column (17), the steel concrete beam (12), and the prestressed steel concrete beam (20) is a node connection area; the node connection area includes a core area and a node area, the core area includes an enclosed core area and a connected and fixed node area, and the core area and the node area are integrally cast and formed.

2. The connection between an underground steel pipe concrete column and an upper profiled steel concrete column according to claim 1, characterized in that: The core area is formed by underground steel tube concrete columns (11), prestressed steel concrete beams (20), and steel concrete beams (12).

3. The connection between an underground steel pipe concrete column and an upper profiled steel concrete column according to claim 2, characterized in that: The area from the lower end surface of the middle steel concrete column (25) of the steel concrete column (17) to the upper end surface of the steel tube concrete column (11) is a node area.

4. The connection between an underground concrete-filled steel tube column and an upper profiled concrete-filled steel tube column according to claim 1, characterized in that: The steel tube concrete column (11) comprises a steel tube concrete column body (24) and a steel tube concrete steel tube frame (26). Vertical partitions (3) and transverse partitions (5) are provided in the steel tube concrete steel tube frame (26). The vertical partitions (3) vertically partition the internal space, and the transverse partitions (5) transversely partition the internal space.

5. The connection between an underground concrete-filled steel tube column and an upper profiled concrete-filled steel tube column according to claim 4, characterized in that: Bolts (6) are provided on both the inner and outer walls of the steel tube concrete steel tube skeleton (26), and a steel bar sleeve (23) for connection is also provided on the outer wall of the steel tube concrete steel tube skeleton (26).

6. The connection between an underground concrete-filled steel tube column and an upper profiled concrete-filled steel tube column according to claim 5, characterized in that: The steel-concrete column (17) comprises a steel-concrete column body (25) and a steel-concrete steel frame (27), and a steel-concrete column diaphragm (9) is provided in the steel-concrete column body (25).

7. The connection between an underground concrete-filled steel tube column and an upper profiled concrete-filled steel tube column according to claim 6, characterized in that: A plurality of column upper section steel vertical reinforcement bars (16) are provided at four sides of the section steel concrete column (17). The upper section steel vertical reinforcement bars (16) pass through the section steel column transverse diaphragm (9) and are connected to the transverse diaphragm (5) in the steel tube concrete column (11).

8. The connection between an underground concrete-filled steel tube column and an upper profiled concrete-filled steel tube column according to claim 6, characterized in that: The steel-concrete steel frame (27) protrudes from the steel-concrete column (25), and the protruding end is connected to the steel tube concrete steel tube frame (26).

9. The connection between an underground concrete-filled steel tube column and an upper profiled concrete-filled steel tube column according to claim 6, characterized in that: Bolts (6) are provided on the outer wall of the steel-concrete steel frame (27).

10. The rapid construction method for connecting an underground steel tube concrete column with an upper profiled steel concrete column according to claim 1, characterized in that: The following steps are involved: A. Welded steel concrete frame (27), steel tube concrete frame (26); B. Perform quick connection of the overall connection nodes; C. After the formwork construction is completed, concrete pouring is carried out; D. The holes at the perforation locations of steel bars and prestressed steel bars are filled to complete the overall construction.

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