Connection structure and construction method capable of realizing precise positioning of multi-legged steel tube concrete spatial structure and pedestal

Abstract

The present invention belongs to the field of bridge engineering technology, and in particular relates to a connection structure and a construction method thereof that can realize precise positioning of a multi-limb steel tube concrete spatial structure and a pedestal. The present invention achieves the purpose of relatively long-term high-strength support use of a multi-limb steel tube concrete structure by arranging supporting steel tube units, steel base units, anchoring steel units, connecting steel tubes and concrete pouring blocks on the concrete pedestal. The present invention has the following advantages: First, the multi-limb steel tube concrete structure has strong integrity, the internal connection structure has high strength, and it is not easy to break or decompose after long-term high-load support use; second, the multi-limb steel tubes are evenly and symmetrically arranged, and the overall connection strength is strengthened by connecting the steel tubes, ensuring that the entire support structure is evenly stressed and stable; third, the construction method of the entire multi-limb steel tube concrete structure mostly adopts welding and pouring technology, and the overall structural layout is also reasonable, which ultimately ensures simple and efficient construction operations.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge engineering, and in particular relates to a connection structure and a construction method thereof that can realize precise positioning of a multi-legged steel tube concrete spatial structure and a pedestal. Background Art

[0002] Multi-leg steel tube concrete structure mainly includes supporting steel tubes and concrete support seats. It is generally used in the pressure-bearing arch ribs of large-span arch bridges. In addition, the multi-leg steel tube structure can further improve the support strength, ultimately making the entire multi-leg steel tube support structure have the advantages of strong initial impact resistance, good seismic resistance, outstanding fire resistance and corrosion resistance, and moderate construction difficulty.

[0003] On the other hand, however, existing multi-leg steel pipe structures often have a problem of insufficient connection strength between the steel pipes and the concrete body, which ultimately results in the multi-leg steel pipes being unable to support heavy weights for a long time and under high loads.

[0004] Therefore, in summary, there is an urgent need for a multi-limb steel pipe support base that can strengthen the connection strength between the steel pipe and the concrete, so that the entire support structure has better integrity and greater support strength.

[0005] A Chinese utility model patent with patent publication number CN207419230U and publication date 2018.05.29 discloses a multi-limb hollow composite tower pier, which is composed of a multi-limb tower column or pier column with at least one limb, and each limb tower column or pier column is connected by a cross brace. Each limb tower column or pier column is a double-layer steel pipe combination. The tower column or pier column is composed of a tower column or pier column segment with a circulation hole and a tower column or pier column segment without a circulation hole, which is spliced together from top to bottom. The lower part of the tower column or pier column segment with a circulation hole is connected to the base, and the upper part is connected to the lower part of the tower column or pier column segment without a circulation hole. The tower column or pier column segments are connected by anchoring short prestressed steel bars and full-length prestressed steel bars running through the entire tower column or pier column.

[0006] However, the multi-limb hollow composite tower pier in this utility model patent is connected by only cross braces between the tower columns. In this way, although the strength between the tower columns can be appropriately improved, there is still a lack of connection structure between the tower columns and the pedestals, and the lower ends of the tower columns are still easy to bend near the pedestals. In this way, the integrity of the entire tower pier is insufficient, and its supporting strength is also insufficient. If it is used for high-load support for a relatively short period of time, the tower pier structure will crack or break. Summary of the Invention

[0007] The present invention provides a connection structure and a construction method thereof that can realize precise positioning of a multi-legged steel tube concrete spatial structure and a pedestal. By arranging supporting steel tube units, steel base units, anchoring steel units, connecting steel tubes and concrete casting blocks on the concrete pedestal, the multi-legged steel tube concrete structure can be supported for a relatively long period of time with high strength.

[0008] The technical solution adopted by the present invention to solve the above-mentioned problem is: a connection structure that can realize precise positioning of a multi-limb steel tube concrete spatial structure and a pedestal, including a concrete pedestal, a plurality of supporting steel tube units arranged on the concrete pedestal, a steel base unit arranged on the concrete pedestal and located between the plurality of supporting steel tube units, an anchoring steel unit arranged in the concrete pedestal and used to connect and strengthen the supporting steel tube unit and the steel base unit, a connecting steel pipe arranged between the steel base unit and the supporting steel pipe unit, and a concrete casting block arranged on the concrete pedestal and with an upper surface higher than the height of the upper end of the connecting steel pipe.

[0009] A further preferred technical solution is that the supporting steel pipe unit includes a steel pipe body whose lower end is arranged on the upper surface of the concrete base and is used to install the connecting steel pipe, steel pipe concrete arranged in the steel pipe body, and a steel pipe shear member arranged on the steel pipe body and used to strengthen the connection in the concrete casting block.

[0010] A further preferred technical solution is that all the supporting steel pipe units are arranged in a centrally symmetrical manner with respect to the steel base unit.

[0011] A further preferred technical solution is that the steel base unit includes a base steel plate arranged on the upper surface of the concrete pedestal, a hemispherical steel block arranged on the upper surface of the base steel plate and on the spherical surface for installing the connecting steel pipe, and a base shear member arranged on the hemispherical steel block and used to strengthen the connection within the concrete casting block.

[0012] A further preferred technical solution is that the anchoring steel unit includes an anchoring base plate arranged in the concrete pedestal, a bolted column arranged at the middle position of the upper surface of the anchoring base plate and used to be connected to the base steel plate, and a reinforcement member arranged at the side position of the upper surface of the anchoring base plate and inserted into the steel tube concrete to strengthen the steel tube body.

[0013] A further preferred technical solution is that the reinforcement is a steel section or a steel rod.

[0014] A further preferred technical solution is that the supporting steel pipe unit also includes a steel pipe hole provided on the steel pipe body and used for inserting and installing the steel pipe shear member, and the anchoring steel unit also includes a steel plate hole provided on the reinforcement and used for inserting and installing the steel pipe shear member.

[0015] A further preferred technical solution is that the upper end surface height of the steel tube concrete is higher than the upper surface height of the concrete casting block.

[0016] A further preferred technical solution is that the upper end surface height of the steel tube concrete is higher than the upper surface height of the concrete casting block.

[0017] A construction method for a connection structure capable of achieving precise positioning of a multi-legged steel tube concrete spatial structure and a cap includes the following steps in sequence:

[0018] S1. Install and connect the anchor steel unit, and pour concrete on the anchor steel unit to form the concrete cap to obtain a concrete support base;

[0019] S2. Install the steel base unit on the concrete support base to obtain a preliminary multi-limb steel pipe body;

[0020] S3, installing the steel pipe body of the supporting steel pipe unit and the connecting steel pipe on the multi-limb steel pipe preliminary body to obtain a multi-limb steel pipe intermediate body;

[0021] S4, pouring the steel tube concrete into the supporting steel tube unit of the multi-limb steel tube intermediate body to obtain the multi-limb steel tube late body;

[0022] S5. Casting the concrete casting blocks on the multi-leg steel tube later body to obtain the final multi-leg steel tube concrete structure.

[0023] The present invention has the following advantages: first, the multi-limb steel tube concrete structure has strong integrity and high internal connection structure strength, and is not easy to break or decompose after long-term high-load support use; second, the multi-limb steel tubes are evenly and symmetrically arranged, and the overall connection strength is strengthened by connecting the steel tubes, ensuring that the entire support structure is evenly stressed and stable; third, the construction method of the entire multi-limb steel tube concrete structure mostly adopts welding and pouring processes, and the overall structural layout is also reasonable, ultimately ensuring simple and efficient construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the use of the multi-limb steel tube concrete structure in the present invention.

[0025] Figure 2 This is a schematic diagram of the first distribution mode of multiple supporting steel pipe units in the present invention from a top view angle.

[0026] Figure 3 It is a schematic diagram of the position structure of the supporting steel pipe unit, steel base unit and anchoring steel unit in the present invention.

[0027] Figure 4 Schematic diagram of the connection structure between the steel tube shear member and the reinforcement steel plate in the present invention.

[0028] Figure 5 This is a schematic diagram of the second distribution mode of multiple supporting steel pipe units in the present invention from a top view angle.

[0029] Figure 6 Schematic diagram of the third distribution mode of multiple supporting steel pipe units in the present invention from a top view angle. DETAILED DESCRIPTION

[0030] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0031] Example: As shown in the attached Figure 1 、 2 , 3, 4, 5 and attached Figure 6 As shown, a connection structure that can realize precise positioning of a multi-limb steel tube concrete spatial structure and a pedestal, includes a concrete pedestal 1, a plurality of supporting steel tube units 2 arranged on the concrete pedestal 1, a steel base unit 3 arranged on the concrete pedestal 1 and located between the plurality of supporting steel tube units 2, an anchoring steel unit 4 arranged in the concrete pedestal 1 and used to connect and strengthen the supporting steel tube units 2 and the steel base unit 3, a connecting steel pipe 5 arranged between the steel base unit 3 and the supporting steel pipe unit 2, and a concrete casting block 6 arranged on the concrete pedestal 1 and having an upper surface higher than the upper end height of the connecting steel pipe 5.

[0032] In this embodiment, the supporting steel pipe unit 2, the steel base unit 3, the anchoring steel unit 4 and the connecting steel pipe 5 form a complete steel structure for ensuring the supporting strength, and the concrete base 1 is cast first for installing the above steel structure, and the concrete casting block 6 is cast later for reinforcing the above steel structure. Ultimately, the entire multi-limb steel tube concrete structure has the advantages of high structural strength, large allowable load and long-term stable use when used for bridge support.

[0033] The supporting steel pipe unit 2 includes a steel pipe main body 201 whose lower end is arranged on the upper surface of the concrete base 1 and is used to install the connecting steel pipe 5, a steel pipe concrete 202 arranged in the steel pipe main body 201, and a steel pipe shear member 203 arranged on the steel pipe main body 201 and used to strengthen the connection in the concrete casting block 6.

[0034] In this embodiment, the material of the above-mentioned steel structure is existing high-strength steel, and the concrete material used for the steel tube concrete 202, the concrete cap 1 and the concrete casting block 6 is existing suitable high-strength concrete.

[0035] The distance between the upper ends of any two supporting steel pipe units 2 may be greater than or smaller than the distance between the lower ends.

[0036] In this embodiment, the plurality of steel pipe bodies 201 are like "flowers" and can be in an "expanded shape" or a "collapsed shape".

[0037] All the supporting steel pipe units 2 are arranged in a centrally symmetrical manner with respect to the steel base unit 3 .

[0038] In this embodiment, they can also be arranged linearly or in a circle in a trapezoidal shape when viewed from above, as shown in the attached figure. Figure 5 And attached Figure 6 shown.

[0039] The steel base unit 3 includes a base steel plate 301 arranged on the upper surface of the concrete base 1, a hemispherical steel block 302 arranged on the upper surface of the base steel plate 301 and on the spherical surface for installing the connecting steel pipe 5, and a base shear member 303 arranged on the hemispherical steel block 302 and used to strengthen the connection within the concrete casting block 6.

[0040] In this embodiment, the hemispherical steel block 302 can be solid or hollow, as long as the connecting steel pipe 5 can be firmly welded and fixed. The base shear member 303 has the same structure as the steel pipe shear member 203, both of which are T-shaped structures, to ensure that the steel pipe body 201 and the hemispherical steel block 302 can be "pulled" accordingly in the concrete casting block 6 formed later.

[0041] The anchoring steel unit 4 includes an anchoring base plate 401 arranged in the concrete base 1, a screw column 402 arranged at the middle position of the upper surface of the anchoring base plate 401 and used to be connected to the base steel plate 301, and a reinforcement 403 arranged at the side position of the upper surface of the anchoring base plate 401 and inserted into the steel tube concrete 202 to strengthen the steel tube body 201.

[0042] In this embodiment, the base steel plate 301 is provided with openings for inserting the screw connection columns 402 and matching fastening nuts. The number of the screw connection columns 402 is 4, which are used to stably screw the 4 corners of the base steel plate 301.

[0043] In addition, the structure of the reinforcement 403 may also be tubular, so as to ensure that the reinforcement 403 can be firmly “held” by the steel tube concrete 202 .

[0044] Finally, the screw column 402 and the reinforcement 403 are welded to the upper surface of the anchor base plate 401, and the welding angle depends on the inclination angle of the steel pipe body 201, and ensure that the reinforcement 403 is located as centrally as possible in the steel pipe body 201 to ensure that the above-mentioned "pulling" structure has a uniform force effect.

[0045] The reinforcement 403 is a steel section or a steel rod.

[0046] In this embodiment, the functions of the reinforcement 403 and the connecting steel pipe 5 are essentially the same, both of which are to reinforce the steel pipe body 201. Therefore, the reinforcement 403 is set relatively low, which can ensure that the connection and reinforcement effect with the connecting steel pipe 5 has the advantages of upper and lower partitions and coordinated use, avoiding the harmful problem that the connecting steel pipe 5 pulls and fixes the reinforcement 403, thereby not being beneficial to reinforcing the steel pipe body 201.

[0047] The supporting steel pipe unit 2 further includes a steel pipe hole 204 provided on the steel pipe body 201 and used for inserting and installing the steel pipe shear member 203 . The anchoring steel unit 4 further includes a steel plate hole 404 provided on the reinforcement 403 and used for inserting and installing the steel pipe shear member 203 .

[0048] In this embodiment, the number of the reinforcement members 403 can be 1-4, so that the steel pipe main body 201 also corresponds to 1-4 rows of the steel pipe shear members 203, so as to ensure that each of the steel pipe shear members 203 can pass through the steel pipe hole 204 and then be inserted into the steel plate hole 404, so that the reinforcement member 403 has the following two fixing structures: first, it is cast and fixed by the steel pipe concrete 202; second, it is plugged and fixed by the steel pipe shear member 203, so that the reinforcement member 403 and the steel pipe main body 201 are more integrated, ensuring the final structural integrity and high strength advantages.

[0049] The upper end surface height of the steel tube concrete 202 is higher than the upper surface height of the concrete casting block 6.

[0050] In this embodiment, the position between the steel pipe body 201 and the upper surface of the concrete casting block 6 is the part where the force is most concentrated, and the steel pipe body 201 is most likely to bend and fail at this position. Therefore, the pouring amount of the steel tube concrete 202 is set to be relatively large, so that the upper end surface of the steel tube concrete 202 is higher than the upper surface of the concrete casting block 6. In this way, the force causing the above-mentioned bending effect is "borne" by the steel pipe body 201 and the steel tube concrete 202 together, so the supporting strength of the supporting steel pipe unit 2 can be further strengthened.

[0051] A construction method for a connection structure capable of achieving precise positioning of a multi-legged steel tube concrete spatial structure and a cap includes the following steps in sequence:

[0052] S1, installing and connecting the anchoring steel unit 4, and pouring concrete on the anchoring steel unit 4 to form the concrete cap 1, thereby obtaining a concrete support base;

[0053] S2, installing the steel base unit 3 on the concrete support base to obtain a preliminary multi-limb steel pipe body;

[0054] S3, installing the steel pipe body of the supporting steel pipe unit 2 and the connecting steel pipe 5 on the preliminary multi-limb steel pipe body to obtain an intermediate multi-limb steel pipe body;

[0055] S4, pouring the steel tube concrete 202 into the supporting steel tube unit 2 of the multi-limb steel tube intermediate body to obtain the multi-limb steel tube late body;

[0056] S5. Casting the concrete casting block 6 on the multi-leg steel tube later body to obtain the final multi-leg steel tube concrete structure.

[0057] In this embodiment, the steel tube shear member 203 is first plugged into the reinforcement member 403, and then the steel tube concrete 202 is poured. In this way, the structure of the anchoring steel unit 4 and the supporting steel tube unit 2 is fixed. However, it cannot be subjected to significant force at this time and can be used in conjunction with a temporary steel tube support frame.

[0058] The steel tube concrete 202 can be poured into the upper opening of the steel tube body 201.

[0059] Next, the connecting steel pipe 5 is welded, and finally the concrete pouring block 6 is poured, so that the outside of the entire multi-limb steel tube concrete structure also has a concrete "frame", which further improves the overall strength of the multi-limb steel tube concrete structure. Of course, when the multi-limb steel tube concrete structure is used, it is necessary to install a load on the supporting steel pipe unit 2, so that the multi-limb steel tube concrete structure can be put into use.

[0060] 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 aforementioned embodiments. 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 connection structure that can achieve precise positioning of multi-legged concrete-filled steel tube spatial structures and caps, characterized by: The invention comprises a concrete cap (1), a plurality of supporting steel pipe units (2) arranged on the concrete cap (1), a steel base unit (3) arranged on the concrete cap (1) and located between the plurality of supporting steel pipe units (2), an anchoring steel unit (4) arranged in the concrete cap (1) and used for connecting and reinforcing the supporting steel pipe units (2) and the steel base unit (3), a connecting steel pipe (5) arranged between the steel base unit (3) and the supporting steel pipe unit (2), and a concrete casting block (6) arranged on the concrete cap (1) and having an upper surface higher than the upper end height of the connecting steel pipe (5). The supporting steel pipe unit (2) comprises a steel pipe body (201) whose lower end is arranged on the upper surface of the concrete cap (1) and is used to install the connecting steel pipe (5), steel pipe concrete (202) arranged in the steel pipe body (201), and a steel pipe shear member (203) arranged on the steel pipe body (201) and used to strengthen the connection in the concrete casting block (6). The steel base unit (3) comprises a base steel plate (301) provided on the upper surface of the concrete cap (1), a hemispherical steel block (302) provided on the upper surface of the base steel plate (301) and on a spherical surface for mounting the connecting steel pipe (5), and a base shear member (303) provided on the hemispherical steel block (302) and used for reinforcing the connection within the concrete casting block (6). The anchoring steel unit (4) comprises an anchoring base plate (401) disposed in the concrete cap (1), a screw column (402) disposed at a middle position on the upper surface of the anchoring base plate (401) and used to connect to the base steel plate (301), and a reinforcing member (403) disposed at a side position on the upper surface of the anchoring base plate (401) and inserted into the steel tube concrete (202) to reinforce the steel tube body (201). The supporting steel pipe unit (2) further comprises a steel pipe hole (204) provided on the steel pipe body (201) and used for inserting and installing the steel pipe shear member (203); the anchoring steel unit (4) further comprises a steel plate hole (404) provided on the reinforcement member (403) and used for inserting and installing the steel pipe shear member (203); The construction method of the connection structure comprises the following steps in sequence: S1, installing and connecting the anchoring steel unit (4), and pouring concrete on the anchoring steel unit (4) to form the concrete cap (1), thereby obtaining a concrete support base; S2, installing the steel base unit (3) on the concrete support base to obtain a preliminary multi-limb steel pipe body; S3, installing the steel pipe body of the supporting steel pipe unit (2) and the connecting steel pipe (5) on the multi-limb steel pipe preliminary body to obtain a multi-limb steel pipe intermediate body; S4, pouring the steel tube concrete (202) into the supporting steel tube unit (2) of the multi-limb steel tube intermediate body to obtain the multi-limb steel tube late body; S5, pouring the concrete pouring block (6) on the later main body of the multi-leg steel tube to obtain the final multi-leg steel tube concrete structure, All the supporting steel pipe units (2) are arranged in a centrally symmetrical manner with respect to the steel base unit (3).

2. The connection structure capable of achieving precise positioning of a multi-legged concrete-filled steel tube spatial structure and a cap according to claim 1, characterized in that: The reinforcement (403) is a steel section.

3. The connection structure capable of achieving precise positioning of a multi-legged concrete-filled steel tube spatial structure and a cap according to claim 1, characterized in that: The upper end surface height of the steel tube concrete (202) is higher than the upper surface height of the concrete casting block (6).

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