CN215405618U - Special tower for solving large-span pushing of steel-concrete composite beam - Google Patents

Abstract

The utility model discloses a special tower for solving the problem of large-span pushing of a steel-concrete composite beam, which comprises a tower unit, wherein the bottom of the tower unit is provided with a base, the base comprises an upper fork lug and a lower fork lug, the upper fork lug is positioned above the lower fork lug, the upper fork lug and the lower fork lug are rotatably connected at a joint, and a temporary locking piece is arranged between the lower fork lug and the upper fork lug to temporarily limit the lower fork lug and the upper fork lug from rotating mutually. The rotatable base is arranged at the bottom of the tower frame to enable the tower frame to be tiltable, namely, the tiltable tower frame structure is arranged, the tower frame is connected with the top of the steel box girder through the rotatable base, so that the constraint of rotation along the bridge direction can be released, the tower frame and the steel box girder can rotate freely, when the pushing cantilever is increased and the working condition of an upper pier is changed, the change of the horizontal force at the top of the tower frame can be automatically eliminated in a tilting mode, the whole tower frame is only pressed and is not bent, the bending moment at the root part is eliminated, the stress concentration is avoided, and the structure safety is guaranteed.

Description

Special tower for solving large-span pushing of steel-concrete composite beam

Technical Field

The utility model relates to the technical field of bridge construction, in particular to a special tower for solving the problem of large-span pushing of a steel-concrete composite beam.

Background

The steel box girder pushing construction method is commonly used in bridge construction needing to cross river channels and busy road sections, and has the advantages of simple construction method, low cost, high speed, safety, controllability and the like. Along with the increasingly complex geology that faces in the bridge construction, the river course that the bridge strides is increasingly wider for the steel box girder span is bigger and bigger, and the mode of setting up interim mound that originally was more commonly used is influenced by geology, shipping influence etc. and factor, and can't use, and does not set up interim mound, then has further challenge to the linear control of steel box girder, prop up counter-force control, disturbance control etc.. The existing solution is to provide a preposed guide beam structure, which mainly includes a steel-concrete composite beam large-span guide beam and a special tower, the guide beam is extended and arranged at the front of a steel box beam, the tower is vertically arranged on the steel box beam, the tower is provided with a plurality of tension cables, and the tension cables respectively hang and pull the steel box beam and the guide beam to realize the hanging and pulling of the guide beam, so that the linear control, the support reaction control and the disturbance control of the steel box beam are improved to a certain extent. The bottom of the existing tower is generally provided with a base, the tower is fixedly arranged on a steel box girder through the base, and the base is fixed and cannot be adjusted, so that the tower cannot be adjusted. However, in the pushing process, along with the increase of the cantilever of the guide beam and the steel box girder, the tension cable force at the end of the guide beam is increased, so that the tower has a forward tilting trend, after the guide beam is subjected to pier installation, the front end top pushing buttress is involved in the whole system to start acting, so that the tension cable force value at the end of the guide beam is reduced, and the tower has a backward tilting trend. If the tower is welded on the steel box girder in a consolidation mode, horizontal force can be formed at the top end of the tower due to the change of the cable force of the tension cable, huge bending moment can be generated at the root of the tower, and stress concentration is caused at the joint of the bottom of the tower and the top of the steel box girder, so that the structure safety is influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects, the utility model provides the special tower for solving the problem of stress concentration at the joint of the bottom of the tower and the top of the steel box girder caused by the unadjustable tower.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the special tower for solving the problem of large-span pushing of the steel-concrete composite beam comprises tower units, wherein the adjacent tower units are transversely connected, a base is arranged at the bottom of each tower unit and comprises an upper fork lug and a lower fork lug, the upper fork lug is positioned above the lower fork lug, the upper fork lug and the lower fork lug are rotatably connected at a joint, and a temporary locking piece is arranged between the lower fork lug and the upper fork lug to temporarily limit the lower fork lug and the upper fork lug from rotating mutually.

Furthermore, the tower unit comprises four upright columns and four cross beams, the upright columns form a cubic structure and are fixed on the base, and adjacent upright columns are connected through the cross beams.

Furthermore, the tower unit is of a multi-layer stacked modular structure, a cubic structure formed by four upright posts is arranged on each module, adjacent upright posts are connected through cross beams, the modules are connected with the modules through flanges, and the flanges are arranged at the end parts of the upright posts.

Furthermore, a flange reinforcing rib is arranged on the flange.

Furthermore, a tower top box body is arranged at the topmost part of the tower unit, and multiple layers of anchoring ends are respectively arranged on two opposite sides of the tower top box body.

Furthermore, the upper fork lug comprises a top plate and a connecting plate A which is positioned on the bottom surface of the top plate and is perpendicular to the bottom plate; the lower fork lug comprises a bottom plate and a connecting plate B which is positioned on the top surface of the bottom plate and is vertical to the top plate; the connecting plate A and the connecting plate B are connected through a pin shaft.

Furthermore, a rib plate A is arranged between the top plate and the connecting plate A; and a rib plate B is arranged between the bottom plate and the connecting plate B.

Furthermore, the bottom surface of the lower fork ear is provided with a fork ear base.

Further, the fork ear base is the I-steel that the polylith transversely distributes side by side.

Furthermore, the top surface of the upper fork ear is provided with a lower distribution beam, and the top surface of the lower distribution beam is provided with an upper distribution beam.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a special tower for solving the problem of large-span jacking of a steel-concrete composite beam, wherein the tower can be inclined by arranging a rotatable base at the bottom of the tower, namely by arranging a tiltable tower structure form, the tower is connected with the top of a steel box beam through the rotatable base and can release the restriction of rotation along the bridge direction, so that the tower and the steel box beam can rotate freely, when a jacking cantilever is enlarged and the working condition of an upper pier is changed, the change of the horizontal force at the top of the tower can be automatically eliminated in an inclined mode, the whole tower is only pressed and is not bent, the root bending moment is eliminated, the stress concentration is avoided, and the structure safety is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the tower unit of FIG. 1;

FIG. 3 is a schematic structural view of the base of FIG. 1;

FIG. 4 is a schematic view of the base of FIG. 3 with the temporary locking member removed;

FIG. 5 is a schematic structural view of the column and the flange;

FIG. 6 is a schematic structural view of the overhead box;

fig. 7 is a partial cross-sectional view of one perspective of the overhead box.

Wherein the labels shown in the figures are: 1-a tower unit; 11-upright post; 12-a cross beam; 13-a flange; 14-flange stiffener; 15-overhead tank; 151-anchoring end; 2-horizontal relation; 31-upper fork ear; 311-top plate; 312-connecting plate a; 313-rib plate A; 32-lower fork ear; 321-a bottom plate; 322-web B; 323-rib plate B; 33-temporary locking; 34-a pin shaft; 35-a fork ear base; 36-lower distribution beam; 37-upper distribution beam.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper" and "lower" are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element which is referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, a preferred embodiment of the present invention provides a special tower for large-span jacking of a steel-concrete composite beam, which includes tower units 1, wherein a transverse connection 2 is provided between adjacent tower units 1, a base 3 is provided at the bottom of the tower unit 1, the base 3 includes an upper fork lug 31 and a lower fork lug 32, the upper fork lug 31 is located above the lower fork lug 32, the upper fork lug 31 and the lower fork lug 32 are rotatably connected at a joint, and a temporary locking member 33 is provided between the lower fork lug 32 and the upper fork lug 31 to temporarily limit the lower fork lug 32 and the upper fork lug 31 from being rotated with each other.

In implementation, the base 3 is arranged on the top surface of the steel box girder and is arranged opposite to a web plate of the steel box girder, specifically, the lower fork lug 32 is fixedly arranged on the top surface of the steel box girder and is fixedly connected through welding, the upper fork lug 31 is rotatably arranged on the lower fork lug 32 and forms a hinge support structural form, the upper fork lug 31 rotates towards the front and back direction of the steel box girder, the tower units 1 are fixedly connected with the base 3, in the preferred embodiment, the tower units 1 are four, the four tower units 1 are vertically arranged, the adjacent tower units 1 are connected through the transverse connection 2, so as to form a tower whole, each tower unit 1 is connected with one base 3, specifically, the bottom of the tower unit 1 is fixedly connected with the upper fork lug 31, when the lower fork lug 32 and the upper fork lug 31 are required to be temporarily limited to be incapable of rotating mutually, the temporary locking piece 33 is arranged between the lower fork lug 32 and the upper fork lug 31, the temporary locking pieces 33 are of a steel section structure, the temporary locking pieces 33 are positioned at four corners of the lower fork lug 32 and the upper fork lug 31, when locking is needed, such as when the tower unit 1 is installed and removed, the base 3 needs to be locked, and the locking can be enhanced by welding the joint of the top of the temporary locking piece 33 and the upper fork lug 31 and the joint of the bottom of the temporary locking piece 33 and the lower fork lug 32; when the locking is needed to be released, the welding position at the top of the temporary locking piece 33 is cut, and then the locking can be released, and the lower fork lug 32 and the upper fork lug 31 can rotate, that is, the base 3 can rotate, and the tower 2 on the base can be correspondingly inclined according to the actual stress. In the implementation, as the upper fork lug 31 and the lower fork lug 32 are connected at the connection part in a rotating way, the tower mounted on the upper fork lug 31 can rotate around the rotating point of the upper fork lug 31 and the lower fork lug 32, the utility model can realize the tilting of the tower by arranging the rotatable base 3 at the bottom of the tower, namely, by arranging the tilting tower structure form, the tower is connected with the top of the steel box girder through the rotatable base 3, the constraint of the rotation along the bridge direction can be released, so that the tower and the steel box girder can rotate freely, when the pushing cantilever is increased and the working condition of the upper pier is changed, the change of the horizontal force at the top of the tower can be automatically eliminated in a tilting way, the whole tower is only pressed and is not bent, the bending moment at the root is eliminated, the stress concentration is avoided, and the structure safety is ensured.

Referring to fig. 1, 2 and 5, in a preferred embodiment, the tower unit 1 includes four columns 11 and four beams 12, the columns 11 are formed into a cubic structure and fixed on the base 3, and adjacent columns 11 are connected by the beams 12. Specifically, the specification of the upright column 11 is Φ 630 × 12mm, and adjacent upright columns 11 may further be provided with diagonal braces to form a triangular stable structure. The tower units 1 are connected by means of transverse links 2, the transverse links 2 being located at top and bottom positions between the tower units 1. Further, the tower unit 1 is of a multi-layer stacked modular structure, a cubic structure formed by four upright posts 11 is arranged on each module, the adjacent upright posts 11 are connected through cross beams 12, the modules and the modules are connected through flanges 13, the flanges are arranged on the end portions of the upright posts 11, bolt holes are formed in the flanges 13, the adjacent flanges 13 can be connected through bolts and are reinforced through a welding mode, and flange reinforcing ribs 14 are arranged on the flanges 13 to reinforce the strength of the joints of the flanges 13. In the preferred embodiment, each tower unit 1 is formed by stacking three modules, and the modules of the tower unit 1 can be prefabricated before implementation through the modularized structure arrangement, and the modules can be directly stacked, connected and fixed during construction, so that rapid construction operation can be realized, and the construction time is saved.

Referring to fig. 1, 2, 6 and 7, a tower top box 15 is disposed at the top of the tower unit 1, multiple layers of anchoring ends 151 are respectively disposed on two opposite sides (in a direction toward ends of the steel box girder and the guide girder) of the tower top box 15, the anchoring ends 151 are three layers, each layer is spaced by 1m, the tower top box 15 is welded into a box structure by steel plates with δ =30mm, δ =24mm and δ =16mm, and is bolted to a steel pipe column. The anchoring end 151 is provided and divided into a plurality of layers, thereby facilitating connection with the tension cable.

In a preferred embodiment, referring to fig. 3 and 4, the upper fork 31 includes a top plate 311 and two connection plates a312 located on the bottom surface of the top plate 311 and perpendicular to the top plate 311, in the preferred embodiment, the number of the upper fork 31 is two, the two connection plates a312 of the upper fork 31 are arranged in parallel, the two connection plates a312 have a spacing interval, pin holes are formed in the connection plates a312, the top plate 311 is made of a 60mm thick steel plate, and the connection plates a312 are made of a 30mm thick steel plate; a rib plate A313 is arranged between the top plate 311 and the connecting plate A312, the rib plates A313 are multiple and are respectively vertical to the top plate 311 and the connecting plate A312, and the rib plates A313 are steel plates with the thickness of 40 mm.

The lower fork lug 32 comprises a bottom plate 321 and two connecting plates B22 which are positioned on the top surface of the bottom plate 321 and vertical to the bottom plate 321, in the preferred embodiment, the two connecting plates B322 are arranged in parallel, and respectively correspond to the spacing interval formed by the connecting plates A312 of the two upper fork lugs 31, pin holes are formed in the connecting plates B322, and the pin holes of the connecting plates B322 are aligned with the pin holes of the connecting plates A312; the connecting plate A312 and the connecting plate B322 are connected through a phi 250 specification pin shaft 34, and the pin shaft 34 penetrates through pin holes of the connecting plate B322 and the connecting plate A312. The bottom plate 321 is a 60mm thick steel plate, the connecting plate B322 is a 40mm thick steel plate, the rib plate B323 is arranged between the bottom plate 321 and the connecting plate B322, the rib plates B323 are multiple and are respectively vertical to the bottom plate 321 and the connecting plate B322, and the rib plate B323 is a 40mm thick steel plate.

Through the specific structure of the upper fork lug 31 and the lower fork lug 32, the rotating connection mode of the upper fork lug 1 and the lower fork lug 32 can be guaranteed, and a stable mechanism is realized to support the tower.

Further, the bottom surface of lower fork ear 32 is provided with fork ear base 35, and fork ear base 35 links firmly with bottom plate 321 of lower fork ear 32 mutually, specifically realizes linking firmly through the welded mode. The fork ear base 35 is a plurality of I25a I-shaped steel pieces which are transversely distributed side by side. Through setting up fork ear base 35, can help strengthening being connected of the top surface of fork ear base 35 and steel box girder, the bottom of the fork ear base 35 of the I25a I-steel form that the polylith transversely distributes side by side links firmly with the top surface of steel box girder mutually during the implementation, and the mode of linking firmly adopts the welding form.

The top surface of the upper fork lug 31 is provided with a lower distribution beam 36, the lower distribution beam 36 comprises a lower distribution beam end plate positioned on the upper end surface and the lower end surface and I-shaped steel positioned between the lower distribution beam end plates, the lower distribution beam end plate adopts a steel plate with the thickness of 30mm, the I-shaped steel is perpendicular to the lower distribution beam end plate, the lower distribution beam end plate positioned below is fixedly connected with a top plate 311 of the upper fork lug 31, and the fixedly connecting mode is welding. The lower distribution beam 36 is one and is transversely arranged and flatly laid on the upper fork lug 31.

The top surface of lower floor's distribution beam 36 is provided with upper distribution beam 37, and upper distribution beam 37 is including the upper distribution beam end plate that is located upper and lower both ends face and the I-steel that is located between the upper distribution beam end plate, and upper distribution beam end plate adopts 30mm thick steel sheet, and the I-steel sets up with upper distribution beam end plate is perpendicular, and the bottom surface of the upper distribution beam end plate that is located the below is fixed connection with the lower floor's distribution beam end plate of the top surface of lower floor's distribution beam 36, and the mode of linking firmly is the welding. The upper distribution beam 37 has two, parallel and transverse arrangement, and the upper distribution beam 37 is located at both ends of the lower distribution beam 36.

In a preferred embodiment, after the fork lug base 35 and the upper distribution beam 37 are arranged, the temporary locking member 33 may be arranged between the fork lug base 35 and the upper distribution beam 37, specifically, the temporary locking member 33 is located at four corners of the fork lug base 35 and the upper distribution beam 37, and when the temporary locking member 33 needs to be completely locked, the top end and the bottom end thereof are fixedly connected by welding, and through this arrangement, the connection strength of the temporary locking member 33 can be enhanced to achieve firm locking.

By providing the lower distribution beam 36 and the upper distribution beam 37, in practice, the bottom of the tower unit 1 (in the preferred embodiment, the upright 11, the bottom of the upright 11 may be reinforced by providing the flange 13) is connected to the top surface of the upper distribution beam 37, specifically, the bottom of the upright 11 is fixedly connected to the end of the top of the upper distribution beam 37, and the lower distribution beam 36 and the upper distribution beam 37 have the function of evenly distributing loads, so that the force applied to the base 3 by the tower unit 1 can be more even, and the base 3 can stably and firmly support the tower unit 1.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The utility model provides a solve special pylon that steel-concrete combination beam large-span pushed away, its characterized in that, including pylon unit (1), adjacent be equipped with horizontal relation (2) between pylon unit (1), the bottom of pylon unit (1) is equipped with base (3), base (3) are including last fork ear (31) and lower fork ear (32), go up fork ear (31) and be located lower fork ear (32) above, go up fork ear (31) and lower fork ear (32) rotate the connection in the junction, be equipped with interim locking piece (33) between lower fork ear (32) and last fork ear (31) with the unable rotation each other of interim restriction lower fork ear (32) and upper fork ear (31).

2. The special tower for solving the problem of large-span jacking of the steel-concrete composite beam as claimed in claim 1, wherein the tower unit (1) comprises four upright columns (11) and four cross beams (12), the four upright columns (11) form a cubic structure and are fixed on the base (3), and the adjacent upright columns (11) are connected through the cross beams (12).

3. The special tower for solving the problem of large-span jacking of the steel-concrete composite beam as claimed in claim 2, wherein the tower unit (1) is a multi-layer stacked modular structure, each module is provided with a cubic structure formed by four upright posts (11), adjacent upright posts (11) are connected through cross beams (12), the modules are connected through flanges (13), and the flanges are arranged at the ends of the upright posts (11).

4. The special tower for solving the problem of large-span jacking of the steel-concrete composite beam as claimed in claim 3, wherein the flange (13) is provided with a flange reinforcing rib (14).

5. The special tower for solving the large-span jacking of the steel-concrete composite beam as claimed in claim 1, wherein the top of the tower unit (1) is provided with a tower top box (15), and two opposite sides of the tower top box (15) are respectively provided with a plurality of layers of anchoring ends (151).

6. The special tower for solving the large-span jacking of the steel-concrete composite beam as claimed in claim 1, wherein said upper fork ear (31) comprises a top plate (311) and a connecting plate A (312) which is positioned at the bottom surface of said top plate (311) and is perpendicular to said top plate (311); the lower fork lug (32) comprises a bottom plate (321) and a connecting plate B (322) which is positioned on the top surface of the bottom plate (321) and is vertical to the bottom plate (321); the connecting plate A (312) and the connecting plate B (322) are connected through a pin shaft (34).

7. The special tower for solving the large-span jacking of the steel-concrete composite beam according to claim 6, wherein a rib plate A (313) is arranged between the top plate (311) and the connecting plate A (312); a rib plate B (323) is arranged between the bottom plate (321) and the connecting plate B (322).

8. The special tower for solving the large-span jacking of the steel-concrete composite beam as claimed in claim 1, wherein a fork lug base (35) is arranged on the bottom surface of the lower fork lug (32).

9. The special tower for solving the problem of large-span jacking of the steel-concrete composite beam as claimed in claim 8, wherein said fork lug bases (35) are a plurality of transverse i-shaped steels distributed side by side.

10. The special tower for solving the large-span jacking of the steel-concrete composite beam as claimed in claim 1, wherein the top surface of the upper fork lug (31) is provided with a lower distribution beam (36), and the top surface of the lower distribution beam (36) is provided with an upper distribution beam (37).

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