Structure and construction method of connecting reinforced concrete column pier with steel box girder by using inserted steel sleeve

Abstract

The present application belongs to the technical field of steel-concrete composite bridge, and particularly relates to a structure of connecting a steel pipe concrete column pier with a steel box girder by using an inserted steel sleeve and a construction method thereof. The present application provides a structure of connecting a steel pipe concrete column pier with a steel box girder by using an inserted steel sleeve, which comprises a bridge pier steel pipe, a pre-poured concrete column, a beam bottom plate, a beam partition plate, a beam top plate, an inserted hole, a cast-in-situ concrete block, a steel sleeve unit, and a ring-shaped frame body unit, so that the cast-in-situ concrete block, the steel sleeve unit and the ring-shaped frame body unit are used in combination, thereby providing a steel-concrete composite connecting mode with sufficient vertical support effect and sufficient lateral limiting strength between the steel pipe concrete column pier and the steel box girder, and ensuring that the structure can be used for a long time with high stability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of steel-concrete composite bridges, and particularly relates to a structure for connecting a steel pipe concrete column pier and a steel box girder by using an inserted steel sleeve and a construction method thereof. BACKGROUND

[0002] The steel pipe concrete column pier refers to a combined pier including two materials of steel and concrete in its own structure. Specifically, the structural components of the pier include an outer steel pipe and inner concrete. Therefore, the pier has the advantages of tensile resistance of steel structure and compressive resistance of concrete structure.

[0003] The steel box girder has a shape similar to a box and a general cuboid shape. The stable connection between the steel pipe concrete column pier and the steel box girder is one of the necessary conditions for long-term stable use of the steel-concrete composite bridge.

[0004] Generally, the connection mode of the structure needs to consider sufficient support effect and sufficient transverse limiting strength. For example, a Chinese utility model patent with the authorization announcement number CN210458919U and the authorization announcement date of May 5, 2020 discloses a steel-concrete composite beam and concrete pier connection structure, which includes a connecting assembly arranged between a composite beam body and a pier. The connecting assembly includes a steel plate hoop wrapped around the pier, a horizontal frame stiffener plate arranged at the bottom of the steel plate hoop and extending into the pier, a bridge pier main reinforcement hole reserved on the horizontal frame stiffener plate, a grouting hole and a bridge pier main reinforcement hole reserved on the bottom plate of the composite beam body, and a bottom plate stiffening rib arranged on the upper surface of the bottom plate of the composite beam body corresponding to the contour line position of the pier. A stiffener plate is welded between the steel plate hoop and the bottom plate of the composite beam body.

[0005] The connection structure of the utility model patent has the advantages of reasonable structure, which can effectively improve the stress performance of the structure and ensure construction safety and engineering quality.

[0006] However, the connection structure has at least the following deficiency in actual use, which is also the technical problem to be solved by the present application, i.e.:

[0007] The part mainly used for providing transverse limiting strength in the connection structure only includes the bridge pier main reinforcement and the stiffener plate, which is far from enough.

[0008] Therefore, in view of the above, there is an urgent need for a new connection structure with sufficient vertical support effect and sufficient transverse limiting strength for connecting a steel pipe concrete column pier and a steel box girder. SUMMARY

[0009] The application provides a structure for connecting a concrete-filled steel tube column pier and a steel box girder by using an inserted steel sleeve, which comprises a pier steel tube, a pre-poured concrete column, a beam bottom plate, a beam partition plate, a beam top plate, an insertion hole, a cast-in-situ concrete block, a steel sleeve unit and a ring-shaped frame body unit, so that the cast-in-situ concrete block, the steel sleeve unit and the ring-shaped frame body unit are combined to provide a steel-concrete combined connection mode with sufficient vertical support effect and sufficient lateral limiting strength between the concrete-filled steel tube column pier and the steel box girder, thereby ensuring that the structure can be used stably for a long time.

[0010] In addition, the application also provides a construction method of the structure, which comprises the following steps in sequence: S1, welding the ring-shaped frame body unit on the inner ring surface of the pier steel tube; S2, welding the pier steel tube on the lower surface of the beam bottom plate; S3, installing the steel sleeve unit on the ring-shaped frame body unit; S4, welding the steel sleeve unit on the insertion hole; and S5, pouring concrete on the beam bottom plate, wherein the steel box girder is prefabricated in a factory, and the steel sleeve unit is inserted on the insertion hole, so that the structure can be constructed relatively efficiently.

[0011] The application solves the above problems by using the following technical scheme: the structure for connecting a concrete-filled steel tube column pier and a steel box girder by using an inserted steel sleeve, which comprises a pier steel tube, a pre-poured concrete column, a beam bottom plate, a beam partition plate, a beam top plate, an insertion hole, a cast-in-situ concrete block, a steel sleeve unit and a ring-shaped frame body unit.

[0012] Further preferred technical schemes are as follows: the steel sleeve unit comprises a vertical pipe inserted on the insertion hole, an outer ring arranged on the outer ring surface of the vertical pipe and used for clamping the upper surface of the beam bottom plate, and an inner ring arranged on the inner ring surface of the vertical pipe and used for connecting the ring-shaped frame body unit.

[0013] Further preferred technical schemes are as follows: the steel sleeve unit further comprises a concrete passing hole arranged on the vertical pipe.

[0014] Further preferred technical schemes are as follows: the ring-shaped frame body unit comprises a connecting circular ring arranged on the lower surface of the inner ring, a downward protruding plate arranged on the connecting circular ring, and a fixing circular ring arranged on the downward protruding plate and used for connecting the inner ring surface of the pier steel tube.

[0015] Further preferably, the pre-cast concrete column is further provided with vertical steel bars for inserting the cast-in-place concrete block.

[0016] Further preferably, the annular frame unit further comprises annular limiting holes arranged on the fixed ring and used for penetrating the vertical steel bars.

[0017] Further preferably, the beam bottom plate is further provided with connecting holes for penetrating the vertical steel bars; and the steel sleeve unit further comprises positioning holes arranged on the outer ring and used for penetrating the vertical steel bars.

[0018] Further preferably, the beam top plate is further provided with cover plate fixing holes for penetrating the vertical steel bars, and pouring openings, the pouring openings are further provided with opening cover plates sleeved with the vertical steel bars, and the vertical steel bars are further provided with fastening nuts for pressing and fixing the opening cover plates.

[0019] Further preferably, the inner surface of the bridge pier steel pipe is further provided with positioning blocks connected with the vertical steel bars and used for vertically blocking the fixed ring, and transverse steel bars connected with the vertical steel bars.

[0020] The construction method of the structure of the inserted steel sleeve reinforced concrete column pier and steel box girder connection comprises the following steps in sequence:

[0021] S1, welding the annular frame unit on the inner surface of the bridge pier steel pipe;

[0022] S2, welding the bridge pier steel pipe on the lower surface of the beam bottom plate;

[0023] S3, installing the steel sleeve unit on the annular frame unit;

[0024] S4, welding the steel sleeve unit on the beam bottom plate;

[0025] S5, casting concrete in the steel sleeve unit,

[0026] Wherein, the steel box girder is prefabricated in a factory, and the steel sleeve unit is inserted into the insertion hole. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present application.

[0028] Figure 2 It is a position schematic diagram of the insertion hole in the present application.

[0029] Figure 3 It is a position schematic diagram of the connecting hole in the present application from the perspective of the bottom.

[0030] Figure 4 Positioning diagram of fastening nut in the present application from the perspective of top view.

[0031] Figure 5 Positioning diagram of steel casing unit and ring-shaped frame unit in the present application.

[0032] Figure 6 Positioning diagram of vertical steel bar in the present application.

[0033] Figure 7 Structure diagram of steel casing unit in the present application from the perspective of top view.

[0034] Figure 8 Structure diagram of ring-shaped frame unit in the present application from the perspective of top view.

[0035] Figure 9 Positioning diagram of positioning block and transverse steel bar in the present application.

[0036] Figure 10 Positioning and shape diagram of stiffening plate in the present application.

[0037] Figure 11 Factory prefabricated structure diagram of concrete-filled steel tube column pier in the present application.

[0038] Figure 12 Factory prefabricated structure diagram of steel box girder in the present application.

[0039] In the figure, the meanings of the respective marks are as follows:

[0040] Bridge pier steel pipe a, pre-poured concrete column b, beam bottom plate c, beam partition plate d, beam top plate e, stiffening plate f;

[0041] Insertion hole 1, cast-in-place concrete block 2, steel casing unit 3, ring-shaped frame unit 4, vertical steel bar 5, connecting hole 6, cover plate fixing hole 7, pouring port 8, opening cover plate 9, fastening nut 10, positioning block 11, transverse steel bar 12;

[0042] Vertical pipe 301, outer ring 302, inner ring 303, concrete passing hole 304, positioning hole 305;

[0043] Connecting circular ring 401, downward protruding plate 402, fixed circular ring 403, annular limiting hole 404. DETAILED DESCRIPTION

[0044] The following description is merely exemplary of the present application and is not intended to limit the scope of the application.

[0045] As shown in the accompanying drawings Figures 1-12As shown, the structure of the connection between the steel tube concrete column pier and the steel box girder is reinforced by the inserted steel sleeve, which includes a pier steel tube a, a pre-cast concrete column b, a beam bottom plate c, a beam partition plate d, a beam top plate e, an inserted hole 1 arranged on the beam bottom plate c, a cast-in-situ concrete block 2 arranged on the beam bottom plate c and in the pier steel tube a and located above the pre-cast concrete column b, a steel sleeve unit 3 arranged on the inserted hole 1 and in the cast-in-situ concrete block 2, and a ring-shaped frame unit 4 arranged at the lower end of the steel sleeve unit 3 and in the cast-in-situ concrete block 2 and used for connecting the inner ring surface of the pier steel tube a.

[0046] In the embodiment, the structure of the steel tube concrete column pier mainly includes the pier steel tube a and the pre-cast concrete column b. The structure of the steel box girder mainly includes the beam bottom plate c, the beam partition plate d, and the beam top plate e. The connection structure of the structure mainly includes the cast-in-situ concrete block 2, the steel sleeve unit 3, and the ring-shaped frame unit 4.

[0047] The inserted steel sleeve mainly refers to the steel sleeve unit 3 and the ring-shaped frame unit 4, and the shape of the latter is similar to a pipe. Therefore, the connection structure of the structure is a steel-concrete composite structure, which can provide sufficient vertical support and lateral limitation, so that the structure has high stability for a long time. The steel tube concrete column pier also has sufficient vertical support strength, and the top of the pier is located on the lower surface of the beam bottom plate c, so that the steel-concrete composite bridge has sufficient load capacity.

[0048] In addition, the steel sleeve unit 3 is inserted into the inserted hole 1, the lateral boundary of the cast-in-situ concrete block 2 is the beam partition plate d, the ring-shaped frame unit 4 is connected to the inner ring surface of the pier steel tube a, and finally the steel sleeve unit 3 and the ring-shaped frame unit 4 are connected and all enter the cast-in-situ concrete block 2, which is the principle of the lateral limitation function.

[0049] Finally, the steel sleeve unit 3 and the ring-shaped frame unit 4 also have the function of appropriately reinforcing the cast-in-situ concrete block 2. The former two can be regarded as the “steel mesh cage” of the cast-in-situ concrete block 2, so that the structural strength of the cast-in-situ concrete block 2 is improved, and the subsequent connection strength and bridge strength are indirectly improved.

[0050] The steel sleeve unit 3 includes a vertical pipe 301 inserted into the inserted hole 1, an outer ring 302 arranged at the upper end of the outer ring surface of the vertical pipe 301 and used for clamping the upper surface of the beam bottom plate c, and an inner ring 303 arranged at the lower end of the inner ring surface of the vertical pipe 301 and used for connecting the ring-shaped frame unit 4.

[0051] In the embodiment, the steel sleeve unit 3 is made of high-strength steel and is integrally formed. The correct installation mode is that the outer ring 302 is pressed on the upper surface of the beam bottom plate c and is welded with the latter.

[0052] Correspondingly, when the outer ring 302 is welded with the beam bottom plate c, the height position of the inner ring 303 is the required position for connecting the ring-shaped frame body unit 4.

[0053] The steel sleeve unit 3 further comprises a concrete passing hole 304 arranged on the vertical pipe 301.

[0054] In the embodiment, the concrete passing hole 304 is arranged vertically in multiple circles on the vertical pipe 301, and each circle is arranged with 4-10 holes, so as to ensure that there is no gap for pouring concrete between the vertical pipe 301 and the bridge pier steel pipe a, thereby improving the structural strength of the cast-in-place concrete block 2.

[0055] On the other hand, the cast-in-place concrete block 2 forms a concrete shear key at the concrete passing hole 304, which can enhance the bonding strength between the steel structure and the concrete structure in the above-mentioned connecting structure.

[0056] The ring-shaped frame body unit 4 comprises a connecting circular ring 401 arranged on the lower surface of the inner ring 303, a downward protruding plate 402 arranged on the connecting circular ring 401, and a fixing circular ring 403 arranged on the downward protruding plate 402 and used for connecting the inner surface of the bridge pier steel pipe a.

[0057] In the embodiment, the ring-shaped frame body unit 4 is also made of high-strength steel and is integrally formed. The middle reserved hole area is used for falling cast-in-place concrete, and finally ensures that the cast-in-place concrete block 2 can fill the entire connecting area of the structure, specifically:

[0058] The cast-in-place concrete block 2 is poured from the upper end surface of the pre-poured concrete column b, first fills the upper end cavity of the bridge pier steel pipe a, then enters the steel box girder through the vertical pipe 301, and then spreads on the beam bottom plate c, the lateral boundary of which is the required two transverse bridge girder partitions d and two longitudinal bridge girder partitions d formed by the cavities at the insertion holes 1, and finally the concrete is stacked upward, and the upper limit is the beam top plate e.

[0059] Therefore, the general outline shape of the cast-in-place concrete block 2 is an upper rectangular parallelepiped and a lower cylindrical body, and the ring-shaped frame body unit 4 is entirely located in the above-mentioned lower cylindrical body.

[0060] On the other hand, the ring-shaped frame body unit 4 is arranged on the bridge pier steel pipe a in the form of a ring-shaped frame body unit 4. Figure 11 Different from the above, the ring-shaped frame body unit 4 can also be installed and fixed when the steel pipe concrete column pier is delivered, that is, the fixing circular ring 403 is welded with the inner surface of the bridge pier steel pipe a when delivered.

[0061] Finally, the connection between the connecting ring 401 and the inner ring 303 can be welding or screwing. When it is screwing, a circle of holes is arranged on both of them, and then a bolt and nut are used.

[0062] The precast concrete column b is also provided with vertical steel bars 5 for inserting the cast-in-place concrete block 2.

[0063] In this embodiment, the vertical steel bars 5 are used to reinforce the precast concrete column b and the cast-in-place concrete block 2, thereby improving the structural strength and connection strength of both.

[0064] The number of vertical steel bars 5 is 4-20, which are evenly spaced in the ring direction.

[0065] The annular frame unit 4 also includes ring direction limiting holes 404 arranged on the fixed ring 403 and used for passing through the vertical steel bars 5.

[0066] In this embodiment, the outer diameter of the connecting ring 401 is relatively small and does not touch the vertical steel bars 5, while the outer diameter of the fixed ring 403 is relatively large and is provided with the ring direction limiting holes 404. The advantages of this method are:

[0067] First, the welding action on the inner surface of the pier steel pipe a of the fixed ring 403 does not interfere with the upward extension of the vertical steel bars 5.

[0068] Second, when the annular frame unit 4 is inserted downward for installation, it has a transverse positioning function. After the steel sleeve unit 3 is also correctly inserted and installed at the steel sleeve unit 3, the inner ring 303 and the connecting ring 401 are aligned, making the connection operation of the two more accurate and efficient.

[0069] In addition, the downward protruding plate 402 avoids the vertical steel bars 5 in the ring direction, which does not affect the downward insertion action of the annular frame unit 4.

[0070] Of course, there is no corresponding relationship between one of the ring direction limiting holes 404 and one of the vertical steel bars 5, and it is only necessary to ensure that all the vertical steel bars 5 are inserted into the ring direction limiting holes 404 one by one.

[0071] The beam bottom plate c is also provided with connecting holes 6 for passing through the vertical steel bars 5; and the steel sleeve unit 3 also includes positioning holes 305 arranged on the outer ring 302 and used for passing through the vertical steel bars 5.

[0072] In this embodiment, the specific role of the vertical steel bars 5 is summarized as follows:

[0073] First, the precast concrete column b and cast-in-place concrete block 2 are reinforced;

[0074] Second, the ring-shaped frame unit 4 is inserted to accurately and conveniently connect with the bridge pier steel pipe a;

[0075] Third, the connecting hole 6 is inserted to help improve the transverse limiting strength of the above-mentioned connecting structure;

[0076] Fourth, the positioning hole 305 is inserted to make the insertion action of the steel sleeve unit 3 and the insertion hole 1 have a pre-positioning alignment effect.

[0077] The beam top plate e is also provided with a cover plate fixing hole 7 for passing through the vertical steel bar 5, and a pouring port 8, the pouring port 8 is also provided with an opening cover plate 9 for sleeving the vertical steel bar 5, and the vertical steel bar 5 is also provided with a fastening nut 10 for pressing and fixing the opening cover plate 9.

[0078] In this embodiment, the fifth function of the vertical steel bar 5 is to insert the cover plate fixing hole 7, that is, to insert the beam top plate e, which also helps to improve the transverse limiting strength of the above-mentioned connecting structure.

[0079] The sixth function of the vertical steel bar 5 is to insert the opening on the opening cover plate 9, so that the opening cover plate 9 can cover the pouring port 8 as much as possible in the middle, to ensure that the subsequent material laid on the beam top plate e will not be leaked and dropped at the pouring port 8.

[0080] On the other hand, a small section of threads is provided on the upper end portion of the vertical steel bar 5 for installing the fastening nut 10, thereby avoiding the opening cover plate 9 from falling off, and also allowing the opening cover plate 9 to be not welded to the beam top plate e.

[0081] In addition, when the fastening nut 10 is fully tightened, if there is a large protrusion on the upper end of the vertical steel bar 5, it should be cut off to avoid protruding from the above-mentioned material layer, otherwise it will endanger passing pedestrians and vehicles.

[0082] Among them, the pouring port 8 and the insertion hole 1 are vertically aligned, and the former is also located inside a circle of the vertical steel bar 5, that is, the combination of the insertion hole 1 and the connecting hole 6 vertically corresponds to and aligns with the combination of the pouring port 8 and the cover plate fixing hole 7.

[0083] Finally, the connecting operation of the steel sleeve unit 3 and the ring-shaped frame unit 4 also needs to be performed after the corresponding tool is inserted into the pouring port 8.

[0084] The bridge pier steel pipe a inner ring surface is further provided with a positioning block 11 connected with the vertical steel bars 5 and used for vertically blocking the fixed circular ring 403, and a transverse steel bar 12 used for connecting the vertical steel bars 5.

[0085] In the embodiment, the positioning block 11 is located in the cast-in-situ concrete block 2, and the transverse steel bar 12 is located in the precast concrete column b. The same point of the two is to fix the bridge pier steel pipe a and the vertical steel bars 5, and the former further has the function of vertically positioning the annular frame body unit 4, otherwise the inner ring 303 cannot be effectively connected with the connecting circular ring 401.

[0086] The positioning block 11 is a small rectangular steel sheet, the transverse steel bar 12 is a small steel bar, and the fixed circular ring 403 is welded on the inner ring surface of the bridge pier steel pipe a and can be further welded with the positioning block 11.

[0087] Finally, the positioning block 11 and the transverse steel bar 12 are arranged in the same way in the ring direction, that is, uniformly spaced, but the former is arranged in one circle and the latter is arranged in multiple vertical circles.

[0088] The construction method of the structure of the inserted steel sleeve reinforced concrete column pier and the steel box girder connection comprises the following steps in sequence:

[0089] S1, welding the annular frame body unit 4 on the inner ring surface of the bridge pier steel pipe a;

[0090] S2, welding the bridge pier steel pipe a on the lower surface of the beam bottom plate c;

[0091] S3, installing the steel sleeve unit 3 on the annular frame body unit 4;

[0092] S4, welding the steel sleeve unit 3 on the beam bottom plate c;

[0093] S5, casting concrete on the steel sleeve unit 3,

[0094] The steel box girder is prefabricated in the factory, and the steel sleeve unit 3 is inserted on the insertion hole 1.

[0095] In S2 of the embodiment, the correct welding position of the bridge pier steel pipe a on the lower surface of the beam bottom plate c can be positioned by a ring of the stiffening plates f, that is, when the outer ring surface of the bridge pier steel pipe a is fully welded with all the stiffening plates f, the bridge pier steel pipe a is in the position relationship that the center axis of the insertion hole 1 is coincident with the center axis of the bridge pier steel pipe a.

[0096] In S5 of the embodiment, after the cast-in-place concrete has submerged the steel casing unit 3, the cast-in-place concrete can be poured on the beam bottom plate c at will between the beam floor slabs d of the pouring area.

[0097] Finally, as shown in the attached Figure 12 When the length of the steel casing unit 3 is significantly greater than the vertical dimension of the beam floor slab d, it is clamped on the insertion hole 1 and cannot fall off, and the operation of inserting the steel casing unit 3 and the insertion hole 1 can be omitted during the site construction stage.

[0098] When the above size relationship is not satisfied, the steel box girder can also have the steel casing unit 3 placed inside when it is prefabricated at the factory, and the steel casing unit 3 can be adjusted and inserted during the site construction stage.

[0099] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the purpose of the application. These are not creative modifications, and as long as they are within the scope of the claims of the application, they are protected by the patent law.

Claims

1. A structure for connecting a concrete filled steel tube column pier to a steel box girder using a plug-in steel sleeve, comprising a pier steel tube (a), a pre-cast concrete column (b), a girder bottom plate (c), a girder diaphragm (d), and a girder top plate (e), characterized in that: It also includes an insertion hole (1) arranged on the beam bottom plate (c), a cast-in-situ concrete block (2) arranged on the beam bottom plate (c) and inside the pier steel pipe (a) and located at a position above the pre-poured concrete column (b), a steel sleeve unit (3) arranged on the insertion hole (1) and located inside the cast-in-situ concrete block (2), and a ring-shaped frame body unit (4) arranged at a lower end position of the steel sleeve unit (3) and located inside the cast-in-situ concrete block (2) and used for connecting the inner ring surface of the pier steel pipe (a), The steel sleeve unit (3) includes a vertical pipe (301) arranged in the insertion hole (1), an outer ring (302) arranged at an upper end position of the outer ring surface of the vertical pipe (301) and used for clamping the upper surface of the beam bottom plate (c), and an inner ring (303) arranged at a lower end position of the inner ring surface of the vertical pipe (301) and used for connecting the ring-shaped frame body unit (4), The ring-shaped frame body unit (4) includes a connecting circular ring (401) arranged on the lower surface of the inner ring (303), a downward protruding plate (402) arranged on the connecting circular ring (401), and a fixing circular ring (403) arranged on the downward protruding plate (402) and used for connecting the inner ring surface of the pier steel pipe (a), The pre-poured concrete column (b) is further provided with a vertical steel bar (5) for inserting the cast-in-situ concrete block (2), The beam bottom plate (c) is further provided with a connecting hole (6) for passing through the vertical steel bar (5); the steel sleeve unit (3) further includes a positioning hole (305) arranged on the outer ring (302) and used for passing through the vertical steel bar (5), The beam top plate (e) is further provided with a cover plate fixing hole (7) for passing through the vertical steel bar (5), and a pouring opening (8), the pouring opening (8) is further provided with an opening cover plate (9) sleeved with the vertical steel bar (5), and the vertical steel bar (5) is further provided with a fastening nut (10) for pressing and fixing the opening cover plate (9).

2. The structure for connecting the steel tube reinforced concrete column pier with the steel box girder using an insert-type steel sleeve as described in claim 1, characterized in that: The steel sleeve unit (3) further includes a concrete passing hole (304) arranged on the vertical pipe (301).

3. The structure for connecting the steel tube reinforced concrete column pier with the steel box girder using an insert-type steel sleeve as described in claim 1, characterized in that: The ring-shaped frame body unit (4) further includes a ring-shaped limiting hole (404) arranged on the fixing circular ring (403) and used for passing through the vertical steel bar (5).

4. The structure of claim 1, wherein the steel pipe concrete column pier and the steel box girder are connected by the inserted steel sleeve. The inner ring surface of the pier steel pipe (a) is further provided with a positioning block (11) connected with the vertical steel bar (5) and used for vertically blocking the fixing circular ring (403), and a transverse steel bar (12) used for connecting the vertical steel bar (5).

5. The construction method of the structure for connecting a concrete filled steel tube column pier with a steel box girder using an inserted steel sleeve according to claim 1, characterized in that It sequentially includes the following steps: S1, welding the ring-shaped frame body unit (4) on the inner ring surface of the pier steel pipe (a); S2, welding the pier steel pipe (a) on the lower surface of the beam bottom plate (c); S3, installing the steel sleeve unit (3) on the ring-shaped frame body unit (4); S4, welding the steel sleeve unit (3) on the beam bottom plate (c); S5, pouring concrete in the steel sleeve unit (3), Among them, the steel box girder is prefabricated in the factory, and the steel sleeve unit (3) is inserted on the insertion hole (1).

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