A connection node between H-shaped steel column and mixed reinforced prestressed pipe pile

Abstract

In order to solve the problems of long foundation construction period and poor seismic performance in emergency building construction, the present invention provides a connection node between H-shaped steel columns and hybrid reinforced prestressed pipe piles, which mainly includes: a portal frame column composed of a bottom plate, an H-shaped steel column and a channel steel shear key respectively fixedly connected to the top and bottom of the bottom plate; a hybrid reinforced prestressed pipe pile composed of a top plate, a circular hoop plate fixedly connected to the bottom of the top plate, a slot steel plate fixedly connected to the inner wall of the circular hoop plate and a steel cylinder fixedly connected to the bottom of the top plate, the inner wall of the slot steel plate is clamped with steel bars distributed in a vertical direction, a concrete layer is arranged on the inner side and the bottom of the circular hoop plate, and the steel cylinder is located inside the slot steel plate; the channel steel shear key passes through the top plate and then slides up and down to be connected to the inside of the steel cylinder, the lower end of the fixing bolt is fixedly connected to the top plate, the hybrid reinforced prestressed pipe pile effectively improves the seismic performance, and the connection between the pile and the H-shaped steel column effectively improves the stability of the overall structure.

Description

Technical Field

[0001] The invention relates to the technical field of building devices, and in particular to a connection node between an H-shaped steel column and a mixed reinforced prestressed pipe pile. Background Art

[0002] At present, the processing, manufacturing and construction technology of prefabricated ground buildings are becoming increasingly mature. However, the development of prefabricated foundations is not satisfactory. High-strength prestressed pipe piles have poor ductility and poor seismic performance. Therefore, such pipe piles are prohibited from being used in buildings in high-intensity earthquake zones of eight degrees or above. In addition, in the construction of emergency buildings, the construction period of the foundation is relatively long. How to shorten the construction period of the foundation is a key issue that engineering and technical personnel and related scientific researchers need to study in depth and should solve as soon as possible. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a connection node between an H-shaped steel column and a mixed reinforced prestressed pipe pile, and the technical solution adopted is as follows:

[0004] A connection node between an H-shaped steel column and a mixed reinforced prestressed pipe pile, characterized in that it mainly comprises:

[0005] The portal frame column is mainly composed of a base plate, an H-shaped steel column and a channel steel shear key respectively fixedly connected to the upper and lower parts of the base plate, and the base plate is provided with mounting holes;

[0006] The mixed reinforced prestressed pipe pile is located below the portal frame column, and includes a top plate, a circular hoop plate fixedly connected to the bottom of the top plate, a slot steel plate fixedly connected to the inner wall of the circular hoop plate, and a steel cylinder fixedly connected to the bottom of the top plate. The slot steel plate is in a circular plate-shaped structure, and a slot recessed from the inside to the outside is arranged on the inner wall of the slot steel plate. A plurality of slots are distributed along the circumference of the slot steel plate, and steel bars distributed in the vertical direction are clamped in the slots. A concrete layer is arranged inside and below the circular hoop plate, and the steel cylinder is located inside the slot steel plate.

[0007] In addition, a through hole is provided on the top plate for the channel steel shear key to pass through. After passing through the through hole, the channel steel shear key is slid up and down and connected to the inside of the steel cylinder. The fixing bolt passes through the first mounting hole from top to bottom and is fixedly connected to the top plate.

[0008] Preferably, a plurality of non-prestressed steel bars distributed vertically downward are fixedly connected to the inner wall of the circular hoop plate, and the plurality of prestressed steel bars and the non-prestressed steel bars are fixed by spiral hoop bars.

[0009] Preferably, stiffening ribs are provided on both sides of the web of the H-shaped steel column located above the bottom plate.

[0010] Preferably, a first rib is provided between the steel cylinder and the lower surface of the top plate and the side wall of the circular hoop plate.

[0011] Preferably, a second rib is provided between the top plate and the outer side surface of the circular hoop plate.

[0012] Preferably, a fine stone concrete layer is poured between the top plate and the bottom plate of the H-shaped steel column.

[0013] Preferably, a bottom plate is fixedly connected to the lower end of the steel cylinder.

[0014] Preferably, a steel reinforcement hoop is fixedly connected to the outer side surface of the circular hoop plate.

[0015] Preferably, the top plate and the bolts are fixedly connected by perforation plug welding.

[0016] The beneficial effects of the present invention are as follows: the prestressed pipe piles adopt a combination of prestressed steel bars and non-prestressed steel bars, which enhances the ductility and seismic resistance of traditional prestressed pipe piles and expands the applicable scope and applicable forms of the mixed reinforced prestressed pipe piles; the mixed reinforced prestressed pipe piles and the portal steel frame columns and the portal steel frame beams are all prefabricated structures, which are convenient for on-site installation and effectively improve work efficiency; and the mixed reinforced prestressed pipe piles are in the form of a combination of a circular hoop plate, a slotted steel plate and a steel frame skeleton, so that the overall structural strength is high, and the portal steel frame column is matched with a steel tube through a channel steel shear key and is fixed by double nut bolt welding, so that the connection relationship between the two is strengthened and the stability of the overall connection node is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the present invention

[0018] Figure 2 AA section view

[0019] Figure 3 BB section view

[0020] Figure 4 For CC section view

[0021] Figure 5 Schematic diagram of the connection structure between the fixing bolts and the top plate

[0022] Figure 6 Schematic diagram of portal frame structure column

[0023] Figure 7 DD section view

[0024] Figure 8 Schematic diagram of mixed reinforced prestressed pipe pile structure

[0025] Fig. 9 Schematic diagram of the connection structure between the circular hoop plate and the slot steel plate

[0026] Fig.10 EE section view

[0027] Among them, 1-H-shaped steel column, 2-bottom plate, 3-stiffening rib, 4-mounting hole, 5-fixing bolt, 6-channel steel shear key, 7-nut, 8-top plate, 9-circular hoop plate, 10-first rib plate, 11-steel reinforcement hoop, 12-slot steel plate, 13-prestressed steel bar, 14-steel cylinder, 15-concrete layer, 16-second rib plate, 17-fine stone concrete layer, 18-slot, 19-through hole, 20-non-prestressed steel bar, 21-spiral stirrup. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0030] like Figure 1-10 The H-shaped steel column and hybrid reinforced prestressed pipe pile connection node shown includes a portal frame column and hybrid reinforced prestressed pipe piles.

[0031] Among them, the portal frame column structure is as follows Figure 6-7 As shown, it is composed of an H-shaped steel column 1, a base plate 2, and a channel steel shear key 6. The base plate 2 is welded below the H-shaped steel column 1, and a channel steel shear key 6 of a U-shaped channel steel structure is welded below the middle position of the base plate 2. Stiffening ribs 3 are welded on the upper end surface of the base plate 2 and the front and rear sides of the web of the H-shaped steel column 1. The two stiffening ribs 3 are symmetrically distributed along the front and rear of the web of the H-shaped steel column 1, and four mounting holes 4 are arranged on the base plate 2.

[0032] Mixed reinforced prestressed pipe pile structure Figure 8-10 As shown, it mainly includes a top plate 8, a hoop plate 9, a slot steel plate 12, and a steel cylinder 14. The top plate 8 is a circular plate structure with a rectangular through hole 19 in the middle. A steel cylinder 14 is welded below the middle of the top plate 8. The steel cylinder 14 is a cylindrical shell structure with a cover at the lower end. The hoop plate 9 is a cylindrical shell without a cover on the top and bottom, which is welded below the top plate 8. The slot steel plate 12 is a circular ring plate structure, which is coaxially welded on the inner wall of the hoop plate 9. The structure of the slot steel plate 12 is as shown in FIG. Fig.10 As shown, its inner wall is provided with a plurality of grooves 18 recessed from the inside to the outside, and the plurality of grooves 18 are evenly distributed along the circumferential direction, and prestressed steel bars 13 distributed vertically downward are clamped in the grooves 18, and non-prestressed steel bars 20 distributed vertically downward are welded to the inner wall of the circular hoop plate 9 through connecting pieces, the prestressed steel bars 13 and the non-prestressed steel bars 20 are distributed at intervals, and the plurality of prestressed steel bars 13 and the non-prestressed steel bars 20 are distributed at intervals and fixed by spiral hoop bars 21 to form a circular skeleton structure, a concrete layer 15 is cast on the inner wall and below of the circular hoop plate 9, and the inner wall of the concrete layer 15 is on the outside of the steel cylinder 14, in addition, a plurality of first ribs 10 are evenly distributed along the circumferential direction of the circular hoop plate 9 between the bottom of the top plate 8 and the outer wall of the circular hoop plate 9, a second rib 16 is welded between the bottom of the top plate 8 and the inner wall of the circular hoop plate 9 and the outer wall of the steel cylinder 14, and a steel reinforcement hoop 11 is also welded to the outer wall of the circular hoop plate 9.

[0033] The portal frame columns and the mixed reinforced prestressed pipe piles are prefabricated before installation. During installation, the mixed reinforced prestressed pipe piles are first placed at the installation position, and then the portal frame columns are lifted. The channel steel shear key 6 is aligned with the position of the through hole 19 and then lowered as a whole, and the channel steel shear key 6 slides vertically downward along the inner wall of the steel cylinder 14. Then, after the fixing bolt 5 passes through the installation hole 4 from top to bottom, its lower end is fixed to the top plate 8 by perforation plug welding. The fixing bolt 5 is fixed and leveled by two nuts 7 respectively located on the upper and lower surfaces of the bottom plate 2. After fixing, C50 fine stone concrete is finally poured between the bottom plate 2 and the top plate 8 to form a fine stone concrete layer 17.

[0034] Since high-strength prestressed pipe piles have poor ductility and poor seismic performance, such pipe piles are prohibited from being used in buildings in earthquake zones with high intensity of eight degrees or above. Hybrid reinforced prestressed pipe piles have better ductility and seismic performance than high-strength prestressed pipe piles, and have obvious technical advantages over high-strength prestressed pipe piles. In mountainous and hilly areas, hybrid reinforced prestressed pipe piles can be used as cylinders, which avoids the complicated construction process of site leveling and saves construction time. The hybrid reinforced prestressed pipe piles driven into the soil are used as foundations, and the parts exposed above the ground can be used as concrete hollow columns. The present invention indirectly expands the scope of application and applicable forms of hybrid reinforced prestressed pipe piles, and provides a simpler and more economical technical solution for the construction of emergency buildings.

[0035] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. A connection node between an H-shaped steel column and a prestressed pipe pile, characterized in that: Mainly include: The portal frame column is mainly composed of a base plate, an H-shaped steel column and a channel steel shear key respectively fixedly connected to the upper and lower parts of the base plate, and the base plate is provided with mounting holes; The mixed reinforced prestressed pipe pile is located below the portal frame column, and includes a top plate, a circular hoop plate fixedly connected to the bottom of the top plate, a slot steel plate fixedly connected to the inner wall of the circular hoop plate, and a steel cylinder fixedly connected to the bottom of the top plate. The slot steel plate is in a circular plate-shaped structure, and a slot recessed from the inside to the outside is arranged on its inner wall. A plurality of slots are evenly distributed along the circumference of the slot steel plate, and prestressed steel bars distributed in the vertical direction are clamped in the slots. A concrete layer is arranged inside and below the circular hoop plate, and the steel cylinder is located inside the slot steel plate. In addition, the top plate is provided with a through hole through which the channel steel shear key passes. The channel steel shear key passes through the through hole and is slid up and down to be connected to the inside of the steel cylinder. The fixing bolt passes through the mounting hole from top to bottom and is fixedly connected to the top plate. A fine stone concrete layer is poured between the top plate and the bottom plate. A plurality of non-prestressed steel bars distributed vertically downward are also fixedly connected to the inner wall of the circular hoop plate, and the plurality of prestressed steel bars and the non-prestressed steel bars are fixed by spiral hoop bars.

2. The connection node between the H-shaped steel column and the mixed reinforced prestressed pipe pile according to claim 1 is characterized in that: Stiffening ribs are arranged on both sides of the web of the H-shaped steel column located above the bottom plate.

3. The connection node between the H-shaped steel column and the mixed reinforced prestressed pipe pile according to claim 1 is characterized in that: A first rib is arranged between the steel cylinder, the lower surface of the top plate and the side wall of the circular hoop plate.

4. The connection node between an H-shaped steel column and a mixed reinforced prestressed pipe pile according to claim 1, characterized in that: A second rib is arranged between the top plate and the outer side surface of the circular hoop plate.

5. The connection node between an H-shaped steel column and a mixed reinforced prestressed pipe pile according to claim 1, characterized in that: The lower end of the steel cylinder is fixedly connected with a bottom sealing plate.

6. The H-shaped steel and prestressed pipe pile connection node according to claim 1, characterized in that: A steel reinforcement hoop is fixedly connected to the outer side surface of the circular hoop plate.

7. The connection node between an H-shaped steel column and a mixed reinforced prestressed pipe pile according to claim 1, characterized in that: The top plate and the bolts are fixedly connected by perforation plug welding.

Images