Steel pipe concrete column type pier and steel box girder connecting structure with steel sleeve reinforcing function

Abstract

The utility model belongs to the technical field of steel-concrete bridges, and particularly relates to a steel pipe concrete column type pier and steel box girder connecting structure with a steel sleeve reinforcing function. The utility model provides a steel pipe concrete column type pier and steel box girder connecting structure with a steel sleeve reinforcing function, which can be used for reinforcing a steel box girder by arranging in-pipe pre-cast concrete, a box girder bottom plate, a bottom plate opening, cast-in-place concrete, a vertical reinforcing steel bar, a penetrating hole, an inserting sleeve unit and an annular reinforcing frame body unit on a pier steel pipe. Therefore, the inserting sleeve unit and the annular reinforcing frame body unit can achieve the reinforced connection effect of a steel structure framework in cast-in-place concrete, it is guaranteed that the steel-concrete connecting structure has the tensile effect of steel and the compressive effect of concrete, and the connecting structure can be stably used for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel-concrete bridges, and in particular relates to a connection structure of a steel tube concrete column pier and a steel box beam with a steel casing reinforcement function. Background Art

[0002] Steel tube concrete column pier is a common type of pier used in existing steel-concrete bridges. Its general structure is steel tube outside and concrete inside, and its shape is generally cylindrical.

[0003] A steel box girder generally refers to a bridge structure constructed from welded steel plates in a box-like shape. Therefore, the steel plates that make up a steel box girder can be primarily categorized into three types: bottom plate, top plate, and diaphragm. These diaphragms can be further divided into transverse diaphragms and longitudinal diaphragms.

[0004] On the other hand, the above-mentioned connection structure mainly includes: steel tube concrete column piers, steel box girders, and the connection structure between the two. Among them, the connection structure is mainly cast-in-place concrete, thereby achieving a relatively high connection strength between the piers and the bridge.

[0005] For example, the Chinese utility model patent with authorization announcement number CN220598128U and authorization announcement date 2024.03.15 discloses a pier-beam fixing structure of a steel box girder and a concrete pier, including a steel box girder, a concrete pier column and a steel casing. The steel casing is arranged at the top of the concrete pier column. An inner cavity surrounded by cross beam plates is provided in the steel box girder. The steel casing includes a main section located between the bottom plate of the steel box girder and the concrete pier column and an anti-torsion section located on the upper side of the main section and inserted into the inner cavity. Micro-expansive concrete is poured into the interior of the steel casing and the inner cavity.

[0006] The pier-beam consolidation structure in this utility model patent achieves greater consolidation strength by mainly two points: first, opening a hole on the bottom plate and inserting the steel casing; second, micro-expansive concrete is poured and solidified in the steel casing and the steel box beam together to connect the two.

[0007] However, in actual use, the pier-beam reinforcement structure still has at least the following shortcomings, which are also the technical problems to be solved by the present utility model, namely:

[0008] The slightly expansive concrete, serving as the primary consolidation point, has a relatively high concrete content and is almost completely missing the primary steel structure within the concrete. Therefore, using concrete alone in this area would be difficult to provide a relatively high consolidation strength and would not fully achieve the combined tensile strength of the steel structure and the compressive strength of the concrete in a steel-concrete structure. Furthermore, the shear studs on the inner annular surface of the steel casing cannot be considered the primary steel structure within the concrete.

[0009] Therefore, in summary, there is an urgent need for a connection structure of steel tube concrete column pier and steel box beam with the same steel-concrete structure, so as to make the above connection structure stronger and more stable. Utility Model Content

[0010] The utility model provides a steel tube concrete column pier and steel box beam connection structure with a steel casing reinforcement function. By arranging precast concrete in the pipe, a box beam bottom plate, a bottom plate opening, cast-in-place concrete, vertical steel bars, perforations, a plug-in casing unit, and an annular reinforcement frame unit on the pier steel pipe, the plug-in casing unit and the annular reinforcement frame unit can play a reinforcing connection effect of a "steel structure skeleton" in the cast-in-place concrete, ensuring that the steel-concrete connection structure has both the tensile strength of steel and the compressive strength of concrete, and the connection structure can be used stably for a long time.

[0011] The technical solution adopted by the present invention to solve the above-mentioned problems is: a connection structure of a steel tube concrete column pier and a steel box beam with a steel casing reinforcement function, including a pier steel tube, precast concrete in the tube, a box beam bottom plate, a bottom plate opening, and cast-in-place concrete, and also including vertical steel bars arranged in the precast concrete in the tube and the cast-in-place concrete, a through-hole arranged on the box beam bottom plate and used for inserting the vertical steel bars, a plug-in sleeve unit arranged on the bottom plate opening, and an annular reinforcement frame unit arranged at the lower end of the plug-in sleeve unit, passing through the vertical steel bars, and used to connect to the inner annular surface of the pier steel tube.

[0012] A further preferred technical solution is that the upper end surface of the pier steel pipe is arranged on the lower surface of the box beam bottom plate, and a vertical stiffening plate is further provided between the outer annular surface of the pier steel pipe and the lower surface of the box beam bottom plate.

[0013] A further preferred technical solution is that the plug-in sleeve unit includes a vertical pipe plugged into the opening of the bottom plate, and an upper annular plate provided at the lower end of the vertical pipe.

[0014] A further preferred technical solution is that the annular reinforcement frame unit includes a middle annular plate arranged on the lower surface of the upper annular plate, a vertical connecting plate arranged on the lower surface of the middle annular plate, a lower annular plate arranged on the lower end surface of the vertical connecting plate and connected to the inner annular surface of the pier steel pipe, and a positioning hole arranged on the lower annular plate and used to pass the vertical steel bars.

[0015] A further preferred technical solution is that screw connections are further provided on the upper annular plate and the middle annular plate.

[0016] A further preferred technical solution is that the plug-in sleeve unit further includes shear nails arranged on the outer annular surface of the vertical pipe.

[0017] A further preferred technical solution is that a fixing block for connecting the vertical steel bars is further provided on the inner annular surface of the pier steel pipe.

[0018] A further preferred technical solution is that the fixing block is located below the annular reinforcement frame unit.

[0019] A further preferred technical solution is that the number of the vertical steel bars is 5-20.

[0020] A further preferred technical solution is that the vertical connecting plate is in the shape of a right-angled trapezoid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 This is a schematic diagram of the position of the vertical steel bars in the present invention.

[0023] Figure 3 This is a schematic diagram of the positions of the openings in the bottom plate of the utility model.

[0024] Figure 4 Schematic diagram of the position and shape of the through-holes in the present invention when viewed from an upward angle.

[0025] Figure 5 It is a schematic diagram of the outline shape of the cast-in-place concrete in the present utility model.

[0026] Figure 6 This is a schematic diagram of the position of the plug-in sleeve unit in the utility model.

[0027] Figure 7 It is a structural diagram of the plug-in sleeve unit in the utility model.

[0028] Figure 8 It is a structural schematic diagram of the annular reinforcement frame unit in the utility model.

[0029] Figure 9 This is a schematic diagram of the position of the fixing block in the present utility model.

[0030] In the figure, the meanings of the marks are as follows:

[0031] Pier steel pipe 11, precast concrete inside the pipe 12, box girder bottom plate 13, bottom plate opening 14, cast-in-place concrete 15, partition 16, top plate 17;

[0032] Vertical steel bar 1, perforation 2, plug-in sleeve unit 3, annular reinforcement frame unit 4, vertical stiffening plate 5, screw connection 6, fixing block 7;

[0033] Vertical pipe 301 , upper annular plate 302 , middle annular plate 401 , vertical connecting plate 402 , lower annular plate 403 , positioning holes 404 , shear pins 303 . DETAILED DESCRIPTION

[0034] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0035] As attached Figure 1-9 As shown, a steel tube concrete column pier and steel box girder connection structure with steel casing reinforcement function includes a pier steel tube 11, precast concrete 12 in the tube, a box girder bottom plate 13, a bottom plate opening 14, and cast-in-place concrete 15, and also includes a vertical steel bar 1 arranged in the precast concrete 12 in the tube and the cast-in-place concrete 15, a through-hole 2 provided on the box girder bottom plate 13 and used for inserting the vertical steel bar 1, a plug-in sleeve unit 3 provided on the bottom plate opening 14, and an annular reinforcement frame unit 4 provided at the lower end of the plug-in sleeve unit 3, passing through the vertical steel bar 1, and used for connecting to the inner annular surface of the pier steel tube 11.

[0036] In this embodiment, the structural components of the steel tube concrete column pier include: pier steel tube 11 and precast concrete 12 within the tube. The structural components of the steel box girder include: box girder bottom plate 13, diaphragm 16, and top plate 17. The steel casing reinforcement function mainly refers to: the plug-in casing unit 3 and the annular reinforcement frame unit 4.

[0037] The connection structure of this structure, including cast-in-place concrete 15, vertical rebar 1, plug-in sleeve units 3, and annular reinforcement frame units 4, is a steel-concrete connection structure. The latter three components are all steel structures, forming the "steel structure skeleton" of the cast-in-place concrete 15. This allows the connection structure to combine the tensile strength of steel with the compressive strength of concrete, ultimately ensuring the long-term stability of the structure.

[0038] The pier steel pipes 11, precast concrete 12 within the pipes, and vertical reinforcement 1 are prefabricated and relatively fixed in a factory before being transported to the bridge construction site. The steel box girders are also prefabricated in the factory, with the bottom plate openings 14 and perforations 2 already provided upon shipment.

[0039] In addition, the plug-in sleeve unit 3 is on top of the annular reinforcement frame unit 4. Therefore, the on-site construction sequence of the connection structure is: installing the annular reinforcement frame unit 4, installing the plug-in sleeve unit 3, and forming the cast-in-place concrete 15.

[0040] Finally, a concrete pouring opening and a cover plate corresponding to the opening can be provided on the top plate 17. After the cast-in-place concrete 15 is solidified and formed, the cover plate can be welded to the main body of the top plate 17.

[0041] The upper end surface of the pier steel pipe 11 is arranged on the lower surface of the box beam bottom plate 13 , and a vertical stiffening plate 5 is further provided between the outer annular surface of the pier steel pipe 11 and the lower surface of the box beam bottom plate 13 .

[0042] In this embodiment, the pier steel pipe 11 is not plugged into the bottom plate opening 14 and its main function is to provide support. The cast-in-place concrete 15 is poured together with the pier and the bridge and its main function is to provide support and lateral limitation.

[0043] In addition, the splice sleeve unit 3 is inserted into the bottom plate opening 14, and the vertical steel bar 1 is inserted into the precast concrete 12 and cast-in-place concrete 15 in the pipe. The main function of the splice sleeve unit 3 and the vertical steel bar 1 is to limit the horizontal position.

[0044] On the other hand, the vertical stiffening plate 5 is in the shape of a right triangle, with two right-angled sides respectively welded to the pier steel pipe 11 and the box beam bottom plate 13. Therefore, the vertical stiffening plate 5 has both supporting and lateral limiting effects.

[0045] The plug-in sleeve unit 3 includes a vertical pipe 301 plugged into the bottom plate opening 14 and an upper annular plate 302 disposed at the lower end of the vertical pipe 301 .

[0046] In this embodiment, the vertical tube 301 and upper annular plate 302 are integrally formed from high-strength steel. The vertical tube 301 is inserted into the bottom plate opening 14 and welded to the box girder bottom plate 13, while the upper annular plate 302 is sequentially connected to the annular reinforcement frame unit 4 and the pier steel pipe 11. Therefore, the combination of the plug-in sleeve unit 3 and the annular reinforcement frame unit 4 ensures a sufficient connection between the pier steel structure and the bridge steel structure. Combined with the cast-in-place concrete 15, this ensures that the connection between the pier and bridge structure possesses relatively high strength and stability.

[0047] The upper end surface of the vertical pipe 301 is flush with the upper surface of the box beam bottom plate 13, or the former protrudes slightly.

[0048] The annular reinforcement frame unit 4 includes a middle annular plate 401 arranged on the lower surface of the upper annular plate 302, a vertical connecting plate 402 arranged on the lower surface of the middle annular plate 401, a lower annular plate 403 arranged on the lower end surface of the vertical connecting plate 402 and connected to the inner annular surface of the pier steel pipe 11, and a positioning hole 404 arranged on the lower annular plate 403 and used to pass the vertical steel bar 1.

[0049] In this embodiment, the upper annular plate 302 , the middle annular plate 401 and the lower annular plate 403 are all in the shape of circular rings, have the same inner diameters, and have the characteristic of having their central axes coincident.

[0050] The outer diameters of the upper annular plate 302 and the middle annular plate 401 are equal and smaller than the outer diameter of the lower annular plate 403 .

[0051] At this point, the upper annular plate 302 and the middle annular plate 401 are later connected, the annular reinforcement frame unit 4 is formed as one piece, and the lower annular plate 403 is later welded to the inner annular surface of the pier steel pipe 11, so that the steel structure part of the connection structure can be formed into the following whole, from top to bottom: steel box girder, plug-in sleeve unit 3, annular reinforcement frame unit 4, and pier steel pipe 11. This is the structural basis of the connection structure with high connection strength and stability.

[0052] Furthermore, the number of positioning holes 404 and through-holes 2 is the same and they are vertically aligned, allowing the vertical steel bars 1 to pass through sequentially from bottom to top. The splice sleeve units 3 and the middle ring plate 401 are located within a circle of vertical steel bars 1, without affecting the installation and use of the vertical steel bars 1.

[0053] Screw members 6 are also provided on the upper annular plate 302 and the middle annular plate 401 .

[0054] In this embodiment, the screw connection 6 is a bolt-nut combination, and correspondingly, mounting holes are provided on both the upper annular plate 302 and the middle annular plate 401. Therefore, when installing the plug-in sleeve unit 3, the rotation adjustment operation ends when the two circles of mounting holes are aligned.

[0055] That is, the screw connector 6 first fixes and installs the upper annular plate 302 , and then the vertical pipe 301 is welded to the box beam bottom plate 13 .

[0056] The plug-in sleeve unit 3 further includes shear studs 303 arranged on the outer annular surface of the vertical pipe 301 .

[0057] In this embodiment, another structural style of the plug-in sleeve unit 3 is to further provide the shear nail 303. In this case, the plug-in sleeve unit 3 is installed on the bottom plate opening 14 in a manner that the plug-in sleeve unit 3 is not inserted downwardly into the bottom plate opening 14, but the steel box girder is downwardly sleeved on the plug-in sleeve unit 3.

[0058] At this point, the plug-in sleeve unit 3 can not only connect the steel box girder and the pier steel pipe 11, but also reinforce itself in the cast-in-place concrete 15, thereby ultimately strengthening the overall structure of the pier bridge connection structure.

[0059] Of course, the shear studs 303 need to avoid the vertical steel bars 1 in the radial and / or circumferential directions, and also cannot affect the installation and use of the latter.

[0060] A fixing block 7 for connecting the vertical steel bars 1 is also provided on the inner annular surface of the pier steel pipe 11 .

[0061] In this embodiment, the main function of the fixing block 7 is to prevent the vertical steel bar 1 from shifting when the precast concrete 12 in the tube is being constructed, so that the relative positions of the vertical steel bar 1 and the pier steel tube 11 are fixed.

[0062] The fixing block 7 is located below the annular reinforcement frame unit 4 .

[0063] In this embodiment, there are two types of installation positions for the fixing blocks 7: first, inside the precast concrete 12 in the tube; second, on the precast concrete 12 in the tube, and lower than the installation position of the lower annular plate 403, so that the number of the fixing blocks 7 is sufficient and appropriate and does not affect the installation and use of the fixing blocks 7.

[0064] The number of the vertical steel bars 1 is 5-20.

[0065] In this embodiment, the overall structure of the cast-in-situ concrete 15 is divided into the following three parts, from top to bottom:

[0066] The first part: the part above the box beam bottom plate 13, which is generally in the shape of a cuboid;

[0067] The second part: the part inside the bottom plate opening 14, which is generally a thinner round cake shape;

[0068] The third part: the part below the box beam bottom plate 13, which is generally cylindrical.

[0069] The lower ends of the vertical steel bars 1 are fixed in the precast concrete 12 in the tube and inserted into the first and third parts. All the vertical steel bars 1 are arranged in a circumferential manner around the second part at even intervals.

[0070] The vertical connecting plate 402 is in the shape of a right-angled trapezoid.

[0071] In this embodiment, the "right waist" of the above-mentioned right-angled trapezoid is flush with the inner annular surfaces of the upper annular plate 302, the middle annular plate 401 and the lower annular plate 403, its "upper base" is set on the lower surface of the middle annular plate 401, and the "lower base" is set on the upper surface of the lower annular plate 403.

[0072] In addition, the vertical connecting plate 402 also needs to avoid the vertical steel bar 1 in the circumferential direction and cannot affect the normal installation and use of the latter.

[0073] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications are possible within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. These modifications are non-inventive and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A steel tube concrete column pier and steel box girder connection structure with steel casing reinforcement function, comprising a pier steel tube (11), precast concrete in the tube (12), a box girder bottom plate (13), a bottom plate opening (14), and cast-in-place concrete (15), characterized in that: It also includes vertical steel bars (1) arranged in the precast concrete (12) and cast-in-place concrete (15) in the tube, through holes (2) arranged on the box beam bottom plate (13) and used for inserting the vertical steel bars (1), a plug-in sleeve unit (3) arranged on the bottom plate opening (14), and an annular reinforcement frame unit (4) arranged at the lower end of the plug-in sleeve unit (3), passing through the vertical steel bars (1), and used for connecting to the inner annular surface of the pier steel tube (11).

2. The connection structure of a steel tube concrete column pier and a steel box beam with steel casing reinforcement according to claim 1, characterized in that: The upper end surface of the pier steel pipe (11) is arranged on the lower surface of the box beam bottom plate (13), and a vertical stiffening plate (5) is further provided between the outer ring surface of the pier steel pipe (11) and the lower surface of the box beam bottom plate (13).

3. The connection structure of a steel tube concrete column pier and a steel box beam with steel casing reinforcement according to claim 1, characterized in that: The plug-in sleeve unit (3) comprises a vertical pipe (301) plugged into the bottom plate opening (14), and an upper annular plate (302) arranged at the lower end of the vertical pipe (301).

4. The connection structure of a steel tube concrete column pier and a steel box beam with steel casing reinforcement according to claim 3, characterized in that: The annular reinforcement frame unit (4) comprises a middle annular plate (401) arranged on the lower surface of the upper annular plate (302), a vertical connecting plate (402) arranged on the lower surface of the middle annular plate (401), a lower annular plate (403) arranged on the lower end surface of the vertical connecting plate (402) and connected to the inner annular surface of the pier steel pipe (11), and a positioning hole (404) arranged on the lower annular plate (403) and used to pass the vertical steel bar (1).

5. The connection structure of a steel tube concrete column pier and a steel box beam with steel casing reinforcement according to claim 4, characterized in that: The upper annular plate (302) and the middle annular plate (401) are also provided with screw connection members (6).

6. The connection structure of a steel tube concrete column pier and a steel box beam with steel casing reinforcement according to claim 3, characterized in that: The plug-in sleeve unit (3) further comprises shear nails (303) arranged on the outer annular surface of the vertical pipe (301).

7. The steel tube concrete column pier and steel box girder connection structure with steel casing reinforcement function according to claim 1, characterized in that: A fixing block (7) for connecting the vertical steel bars (1) is also provided on the inner annular surface of the pier steel pipe (11).

8. The steel tube concrete column pier and steel box girder connection structure with steel casing reinforcement function according to claim 7, characterized in that: The fixing block (7) is located below the annular reinforcement frame unit (4).

9. The steel tubular concrete column pier and steel box girder connection structure with steel casing reinforcement function according to claim 1, characterized in that: The number of the vertical steel bars (1) is 5-20.

10. The connection structure of a steel tube concrete column pier and a steel box beam with steel casing reinforcement according to claim 4, characterized in that: The vertical connecting plate (402) is in the shape of a right-angled trapezoid.

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