CN215857135U - Integral manufacturing structure for large-size large-tonnage cantilever type steel box girder in factory - Google Patents

Abstract

The integral manufacture structure for large size large tonnage cantilever steel box girder in factory includes fixing and supporting the top plate and the bottom plate of the steel main girder with several inner trusses, setting several regulating seats outside the main longitudinal girders on two sides, cantilever arm assembly comprising side plates, several cross beams and several oblique beams, clamping several oblique beams between the regulating seats and the oblique beams, and sleeving the arc concave ends onto the arc convex surfaces of the regulating seats. Utilize the bracing as the strengthening rib of arm sub-assembly and middle part steel girder is chosen to both sides, adjust the registrate of seat circular arc convex surface through bracing end circular arc recess and steel girder both sides, form and twist reverse the ascending interim fine setting structure of direction, recycle and adjust seat self and utilize the spot welding setting of demolising, form the ascending interim fine setting structure of linear direction, thereby guarantee the bracing angle of inclination, the degree of accuracy in welding position, utilize simultaneously to support the seat on the mould car, the accurate efficient regulation work is accomplished to the hoist engine, realize the large-span, the accurate installation location of arm sub-assembly atress part is chosen to the large-tonnage.

Description

Integral manufacturing structure for large-size large-tonnage cantilever type steel box girder in factory

Technical Field

The utility model belongs to the technical field of bridge manufacturing, and particularly relates to an integral manufacturing structure in a factory for a large-size large-tonnage cantilever type steel box girder.

Background

The golden sea bridge is a domestic first-seat highway-railway same-layer multi-tower cable-stayed bridge, and adopts a novel large-size cantilever type steel box girder, wherein the steel main girder at the middle part is used for bearing railway equipment, and cantilever arm combined parts at two sides are used for bearing highway equipment. In order to ensure the mechanical property of the common layer and the iron layer, an inclined strut component must be additionally arranged between the steel main beam and the cantilever arm assembly to ensure the stability, and the inclined angle, the end position and the offset degree of the inclined strut installation have higher precision requirements; however, due to the large size and heavy tonnage of the cantilever type steel box girder in the whole stage, the positioning welding position of the inclined strut is prone to have large deviation, once the position of the inclined strut deviates or the inclination angle deviates, the bearing performance of the cantilever arm assembly parts on two sides can be affected, and the safety factor of the bridge is reduced. Therefore, a mature technique is required to ensure the accurate positioning and installation of each component of the cantilever steel box girder.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides an integral manufacturing structure in a factory for a large-size large-tonnage cantilever type steel box girder, which is used for improving the mounting and positioning precision of each part (especially an inclined strut) in the cantilever type steel box girder and ensuring the service performance of a highway-railway same-layer bridge.

The utility model is implemented by the following technical scheme: an integral manufacturing structure for a large-size large-tonnage cantilever type steel box girder in a factory comprises a steel main girder, two cantilever assembly parts and a plurality of inclined struts. The steel main beam is a welded steel structural part and is formed by welding an upper top plate, a lower bottom plate and two side main longitudinal beams, wherein a plurality of inner trusses which are welded in parallel are fixedly supported between the top plate and the bottom plate, a plurality of adjusting seats which are arranged in parallel are arranged on the outer side surfaces of the two side main longitudinal beams in a spot welding mode, and the ends of the adjusting seats are arc convex surfaces; the cantilever arm assemblies on the two sides are respectively composed of a side plate, a plurality of cross beams and a plurality of oblique beams, wherein the bottom surface of the side plate is welded with the plurality of cross beams which are arranged in parallel and used as reinforcing ribs, and the plurality of oblique beams are welded on the bottom surfaces of the plurality of cross beams in an oblique direction and point to the adjusting seat by the end heads thereof; the plurality of inclined struts are clamped into a gap space between the adjusting seat and the inclined beam, and the arc concave surface-shaped end caps of the inclined struts are sleeved on the arc convex surface of the end of the adjusting seat.

Furthermore, a plurality of anchor pipes arranged in an array are arranged above the top plate, and the anchor pipes are hollow square pipes and are used for being sleeved into steel strands of the cable-stayed bridge.

Furthermore, the inclined strut is supported and the assembly angle is adjusted through the mould car and the abutting seat arranged on the inclined strut, and a winch on the mould car provides adjusting power for the inclination angle of the inclined strut through the connection of a steel wire rope of the winch and the end head of the inclined strut.

The utility model has the beneficial effects that: this device utilizes the inner truss support of steel girder to form stable structure, with the bracing as the strengthening rib of both sides cantilever arm sub-assembly and middle part steel girder, adjust the registrate of seat circular arc convex surface through bracing end circular arc recess and steel girder both sides, form and twist reverse the ascending interim fine setting structure of direction, recycle and adjust seat self and utilize the spot welding setting of demolising, form the ascending interim fine setting structure of linear direction, thereby guarantee the bracing angle of inclination, the degree of accuracy in welding position, utilize simultaneously to support the seat on the mould car, the accurate efficient regulation work is accomplished to the hoist engine, realize the large-span, the accurate installation location of large-tonnage cantilever arm sub-assembly atress part, the safety suitability of guarantee common and railway same-storey guy bridge.

Drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is an isometric view of the picker arm assembly of the present invention;

fig. 4 is a schematic view of the installation process of the sprag in the present invention.

In the figure: the steel frame comprises a steel main beam 1, a top plate 1a, a bottom plate 1b, an inner truss 1c, a main longitudinal beam 1d, an adjusting seat 1e, an anchor pipe 1f, an arm picking assembly 2, a side plate 2a, a cross beam 2b, an oblique beam 2c, an oblique strut 3, a buttress 4, a formwork car 5, a support seat 5a and a winch 5 b.

Detailed Description

The utility model is described in further detail below with reference to the drawings.

As shown in figure 1, the integral manufacturing structure for a large-size large-tonnage cantilever type steel box girder in a factory comprises a steel main girder 1, two cantilever assemblies 2 and a plurality of inclined struts 3. The steel main beam 1 is a welded steel structural member and is formed by welding an upper top plate 1a, a lower bottom plate 1b and two side main longitudinal beams 1d, wherein a plurality of inner trusses 1c welded in parallel are fixedly supported between the top plate 1a and the bottom plate 1b, a plurality of anchor pipes 1f arranged in an array mode are arranged above the top plate 1a, and the anchor pipes 1f are hollow square pipe bodies and used for being sleeved with steel strands of a cable-stayed bridge; a plurality of adjusting seats 1e arranged in parallel are arranged on the outer side surfaces of the main longitudinal beams 1d on the two sides in a spot welding mode, and the ends of the adjusting seats 1e are arc convex surfaces; the cantilever arm assemblies 2 on the two sides are respectively composed of a side plate 2a, a plurality of cross beams 2b and a plurality of oblique beams 2c, wherein the bottom surface of the side plate 2a is welded with the plurality of cross beams 2b arranged in parallel to serve as reinforcing ribs, and the plurality of oblique beams 2c are welded on the bottom surfaces of the plurality of cross beams 2b in an oblique direction and point to the adjusting seat 1e through the end heads thereof; the plurality of inclined struts 3 are clamped in a gap space between the adjusting seat 1e and the inclined beam 2c, and the arc concave surface-shaped end caps of the inclined struts are sleeved on the arc convex surface of the end of the adjusting seat 1 e.

The assembly operation implemented by the utility model comprises the following steps:

s1: the steel main beam 1 is lifted by a lifting appliance and placed on a plurality of buttresses 4, then the cantilever assembly parts 2 are placed on two sides in the same way, and the positioning welding treatment is carried out on the contact parts of the steel main beam 1 and the cantilever assembly parts 2.

S2: as shown in fig. 4, the body part of the inclined strut 3 is placed on the arc surface end of the abutting seat 5a of the mold car 5, the steel wire rope of the winch 5b is led out, the steel wire rope is bound on the end of the inclined strut 3, the position of the mold car 5 is adjusted to enable the mold car to obliquely run into the side of the adjusting seat 1e, the arc concave surface of the inclined strut 3 is ensured to abut against the arc convex surface of the adjusting seat 1e, the winch 5b is controlled to enable the winch to adjust the leading-out amount of the steel wire rope, the inclination angle of the inclined strut 3 on the abutting seat 5a is further controlled until the body part of the inclined strut 3 is parallel to the inclined beam 2c, at the moment, the matching position of the end of the inclined strut 3 and the end of the inclined beam 2c is checked, if the position error in the front-back direction exists, the inclined strut 3 is hammered by a hammer to finely adjust the distance, if the angle error exists, the winch 5b is started again to finely adjust the inclination angle until the welding port is completely matched.

S3: through the operation of step S2, the inclined strut 3 is fixed on the inclined beam 2c, the position of the adjusting seat 1e is checked, if an error occurs, the spot welding part is ground for adjustment, finally, the welding positions are subjected to repair welding treatment, and after the residual stress is eliminated, the welding positions are carried away by a lifting appliance, so that the cantilever type steel box beam assembly with good mechanical property and installation form is obtained.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and various equivalents thereof which may be made by those skilled in the art by use of the features of the appended claims should fall within the scope of the present invention.

Claims (3)

1. The utility model provides an about jumbo size large-tonnage cantilever arm formula steel box girder factory internal manufacturing structure, includes steel girder, two cantilever arm sub-assemblies, a plurality of bracing, its characterized in that: the steel girder is the welding steel structure, is formed by top roof, below bottom plate and both sides main longitudinal beam welding, wherein the roof be fixed stay is carried out by a plurality of inner trusses that weld side by side between the bottom plate, both sides be equipped with a plurality of regulation seats that set up side by side on the lateral surface of main longitudinal beam with the spot welding mode, the end of adjusting the seat is the circular arc convex surface, both sides the cantilever sub-assembly comprises curb plate, a plurality of crossbeam and a plurality of sloping, wherein curb plate bottom surface welding is equipped with a plurality of crossbeams that set up side by side in order to be as the strengthening rib, and is a plurality of crossbeam bottom surfaces are located with the welding of slant direction to adjust the seat with its end is directional, and a plurality of the bracing card is gone into the clearance space between regulation seat and the sloping to close the circular arc convex surface in adjusting the seat end with its circular arc concave surface form end cap.

2. The in-plant integral manufacturing structure of the large-size large-tonnage outrigger type steel box girder according to claim 1, wherein: and a plurality of anchor pipes arranged in an array are arranged above the top plate and are hollow square pipes for being sleeved with steel strands of a cable-stayed bridge.

3. The in-plant integral manufacturing structure of the large-size large-tonnage outrigger type steel box girder according to claim 1, wherein: the inclined strut is supported and the assembly angle is adjusted through the mold trolley and the abutting seat loaded on the inclined strut, and a winch on the mold trolley provides adjusting power for the inclined angle of the inclined strut through the connection of a steel wire rope of the winch and the end of the inclined strut.

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