CN219710076U - Be used for approaching existing railway steel truss girder and assemble construction support - Google Patents

Abstract

The embodiment of the utility model provides a splicing construction bracket for a steel truss girder adjacent to an existing railway, which comprises the following components: the plurality of bored piles are arranged in pairs and are longitudinally arranged in the horizontal ground along the steel truss girder, and each bored pile corresponds to one node on the steel truss girder; the steel pipe column is vertically arranged on the bored pile; the sliding plate is arranged at the top of the steel pipe column through the supporting mechanism with adjustable height, the steel truss girder is arranged on the sliding plate, and can slide on the sliding plate when the steel truss girder expands with heat and contracts with cold, so that the stability and the safety of the bracket are prevented from being influenced when the steel truss girder stretches longitudinally; wherein, the width direction of the steel truss girder is transverse, and the length direction is longitudinal. Aiming at the problems that the prior bracket has a complex structural form, long manufacturing and installation time, larger overall outline dimension and larger required basic plane dimension, and when the steel truss girder is longitudinally stretched under the influence of temperature, the upright pier top steel pipe can generate larger horizontal deformation.

Description

Be used for approaching existing railway steel truss girder and assemble construction support

Technical Field

The utility model relates to the technical field of bridge engineering, in particular to a splicing construction support for a steel truss girder adjacent to an existing railway.

Background

The steel truss girder has the advantages of definite stress, rapid construction, strong spanning capability and the like, and is a main structural type of the current large-span steel structure bridge. When the steel truss beam spans the existing railway, in order to ensure the safe operation of the railway and consider factors such as transportation, a construction method of splicing on site by a bracket method and then turning is generally adopted.

When the steel truss girder is spliced on site, in order to accelerate the construction progress and reduce the engineering quantity of the construction support, the number of segments is generally reduced as much as possible, but the self weight of each segment is larger, so that the construction support is required to bear larger load. The assembly site is close to the existing railway, once a safety accident occurs, the operation of the railway is seriously affected, huge casualties and economic losses are caused, so that the applied support for assembling the steel truss girder close to the railway is required to have enough bearing capacity, rigidity and stability, and on the basis, the convenience and economical efficiency of construction are comprehensively considered.

Aiming at the construction support assembled by the steel truss girder, china patent discloses a CN104278640B patent technology. The technical method comprises a plurality of spliced bracket units which are arranged corresponding to longitudinal joints of the steel truss girder, wherein each bracket unit comprises four steel upright posts which are vertically arranged and are arranged in a rectangular shape, and upper and lower parallel connection and connection systems are arranged at proper positions among the steel upright posts according to the elevation of the girder bottom of each spliced section of the steel truss girder, so that a stable framework system is formed.

At present, the steel truss girder is assembled by adopting the latticed column type bracket system with the technology, so that higher safety can be ensured, but certain defects exist in the application process, and the latticed column type bracket system is mainly characterized in the following aspects:

(1) The lattice column construction support is complex in structural form, more in rods and columns, longer in manufacturing and mounting time, larger in overall outline dimension, limited in construction space and capable of affecting the construction of the steel truss bridge deck.

(2) Under the action of temperature, along with the longitudinal expansion of the steel truss girder, the steel pipe at the top of the upright column pier can generate larger horizontal deformation, and the stability and the safety of the bracket are affected.

(3) The required basic plane size of adopting lattice column form support is great, if adopt the stake basis, can lead to the pile foundation root number more, and the engineering time is long.

Disclosure of Invention

Aiming at the technical problems, the embodiment of the utility model provides a splicing construction bracket for a steel truss girder of an adjacent existing railway.

According to an embodiment of the present utility model, there is provided a construction stand for splicing steel trusses adjacent to an existing railway, including: the plurality of bored piles are arranged in pairs and are longitudinally arranged in the horizontal ground along the steel truss girder, and each bored pile corresponds to one node on the steel truss girder;

the steel pipe column is vertically arranged on the bored pile;

the sliding plate is arranged at the top of the steel pipe column through the supporting mechanism with adjustable height, the steel truss girder is arranged on the sliding plate, and can slide on the sliding plate when the steel truss girder expands with heat and contracts with cold, so that the stability and the safety of the bracket are prevented from being influenced when the steel truss girder stretches longitudinally;

wherein, the width direction of the steel truss girder is transverse, and the length direction is longitudinal.

The steel-pipe column both sides are all connected with subaerial cable snap ring through the flexible cable that draws to one side the setting for improve the overall stability of the support of steel-pipe column.

The sliding plate is a polytetrafluoroethylene plate, the temperature force is released, and the indirect influence of the temperature effect on the bracket is reduced.

And the sliding plate is provided with a limiting assembly for limiting the sliding range of the sliding plate.

The height-adjustable support mechanism includes:

the column cap is fixedly arranged at the top of the steel pipe column;

the supporting component with adjustable elevation is arranged on the column cap and used for falling the beam;

the bolster is arranged on the supporting component;

the cushion block is arranged on the cushion beam, a sliding plate is arranged on the cushion block, and the cushion block is positioned right below the steel truss girder rod node and is used for bearing the steel truss girder rod node.

The utility model also comprises a pair of jacks which are arranged on the cushion beams and symmetrically arranged on two sides of the cushion blocks, and when the elevation of the steel truss beam at the individual node is lower than the designed elevation, the steel truss beam is jacked up by the jacks.

The jack is arranged at a steel truss girder node with the elevation lower than the designed elevation.

The jack top is provided with the steel sheet, after jack-up with the steel truss girder, reaches the purpose of adjustment elevation.

The support assembly is the sand box, the sand box includes interior tubular and outer tube, and interior tubular top sets up the floorplan, and the bottom cooperation is installed in the outer tube, the outer tube bottom sets up and unloads the sand hole, the inside sand that fills of outer tube, after unloading the sand hole and letting out the sand, interior tubular can outwards be intraductal removal of cover, and at this moment, the floorplan can descend to reach the effect of adjustment elevation.

The utility model also comprises a distributing beam which is arranged on the sliding plate.

By adopting the technical scheme, the embodiment of the utility model has the following technical effects:

(1) According to the steel truss girder erection elevation requirement, single column type steel pipe columns with corresponding heights are erected to serve as splicing brackets, construction difficulty is low, manufacturing and installation time is short, steel is saved, and manufacturing cost is relatively low.

(2) Two flexible inhaul cables are additionally arranged at the top of each single-column steel pipe column support and are connected with the bottoms of two adjacent columns, and the stability of the support is high.

(3) The bored pile of the single pile foundation is adopted below the ground line, so that the construction is quick; the single column steel pipe pier is adopted above the ground line, so that the occupied space is small, and the beam body is convenient to assemble and construct.

(4) And the polytetrafluoroethylene sliding plate is arranged on the cushion block to release the temperature force, so that the indirect influence of the temperature effect on the single-column steel pipe pier bracket is reduced.

(5) The utility model greatly shortens the erection period of the steel truss girder spliced bracket, reduces the engineering investment and reduces the occupied area of temporary construction engineering. The utility model has wide application prospect in the construction situation of assembling the steel truss girder on the existing railway site.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a forward elevation view of a construction bracket of the present utility model.

Fig. 2 is a transverse bridge in the form of a construction bracket according to the utility model in an elevation view.

Fig. 3 is an overall elevation view of the utility model in practical application.

Fig. 4 is an enlarged view at a in fig. 1.

Fig. 5 is an enlarged view at B in fig. 2.

Reference numerals: the steel pipe pile comprises a 1-steel pipe column, a 2-column cap, a 3-flexible inhaul cable, a 4-sand box, a 5-bolster, a 6-cushion block, a 7-slide plate, an 8-distribution beam, a 9-jack and a 10-bored pile.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present utility model more apparent, the following detailed description of exemplary embodiments of the present utility model is provided in conjunction with the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model and not exhaustive of all embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

As shown in fig. 1 to 3, a plurality of bored piles 10 are arranged in pairs, each bored pile 10 corresponding to one node on the steel truss girder, and are disposed in the horizontal ground in the longitudinal direction of the steel truss girder; the steel pipe column 1 is vertically arranged on the bored pile 10; the sliding plate 7 is arranged at the top of the steel pipe column 1 through a supporting mechanism with adjustable height, a steel truss girder is arranged on the sliding plate 7, when the steel truss girder expands with heat and contracts with cold, the steel truss girder can slide on the sliding plate 7 and is used for preventing the stability and the safety of a bracket from being influenced when the steel truss girder stretches longitudinally, the sliding plate 7 is a polytetrafluoroethylene plate, the temperature force is released, the indirect influence of the temperature effect on the bracket is reduced, and a limiting component is arranged on the sliding plate 7 and is used for limiting the sliding range of the sliding plate 7; wherein, the width direction of the steel truss girder is transverse, and the length direction is longitudinal.

As shown in fig. 1 and 3, two sides of the steel pipe column 1 are connected with a guy cable snap ring on the ground through a guy cable 3 which is obliquely arranged, so as to improve the overall stability of the bracket of the steel pipe column 1.

As shown in fig. 1 and 2 and fig. 4 and 5, the height-adjustable support mechanism includes: the column cap 2 is fixedly arranged at the top of the steel pipe column 1; the supporting component with adjustable elevation is arranged on the column cap 2 and is used for falling beams; the bolster 5 is arranged on the support component, the support component is a sand box 4, the sand box 4 comprises an inner pressure pipe and an outer sleeve, the bolster 5 is arranged at the top of the inner pressure pipe, the bottom of the inner pressure pipe is matched and arranged in the outer sleeve, a sand discharging hole is arranged at the bottom of the outer sleeve, sand is filled in the outer sleeve, and after the sand is discharged from the sand discharging hole, the inner pressure pipe moves towards the inside of the outer sleeve, and at the moment, the bolster 5 descends to achieve the effect of adjusting the elevation; the cushion block 6 is arranged on the cushion beam 5, the slide plate 7 is arranged on the cushion block 6, and the cushion block 6 is positioned right below the steel truss girder rod node and used for bearing the steel truss girder rod node.

As shown in fig. 5, the utility model further comprises a pair of jacks 9 arranged on the cushion beams 5 and symmetrically arranged on two sides of the cushion blocks 6, when the elevation of the steel truss beam at the individual node is lower than the designed elevation, the jacks 9 are used for jacking the steel truss beam, the jacks 9 are arranged at the steel truss beam nodes with the elevation lower than the designed elevation, and the top of each jack 9 is provided with a steel plate, so that the purpose of adjusting the elevation is achieved after the steel truss beam is jacked.

As shown in fig. 1 and 2 and fig. 4 and 5, the present utility model further comprises a distribution beam 8 provided on the slide plate 7.

The embodiment is constructed by the following steps: the flexible inhaul cable 3 adopts a steel wire rope structure, one end is fixed at the top of the steel pipe column 1, one end is fixed on an inhaul cable snap ring pre-buried at the pile tops at the bottom of two adjacent steel pipe columns 1, so that the overall stability of the bracket is improved, a column cap 2 is welded at the pier top of the steel pipe column 1, a sand box 4 is hoisted, a cushion 5 is placed on the steel pipe column, a cushion 6 is hoisted and assembled, the cushion 6 is guaranteed to be positioned right below a steel truss rod node, a slide plate 7 adopts a polytetrafluoroethylene plate with a small friction coefficient and is arranged on each cushion 6, the influence of expansion deformation of the steel girder on the steel pipe column 1 due to the temperature effect is reduced, a limiting component is arranged to control the sliding of a girder body, when the assembly bracket is assembled, for example, when the elevation of the steel truss at the individual node is lower than the design elevation, a jack 9 is arranged on the cushion 5 at the top of the assembly bracket, the steel truss is jacked, and the purpose of adjusting the elevation is achieved by the cushion steel plate.

Taking the existing high-speed rail as an example of a certain highway bridge in the gallery city, the bridge adopts a continuous steel truss girder with a main span of 268m, the longitudinal distance between nodes is 11m, the construction method of splicing on site by a bracket and then turning closure is adopted to ensure the safe operation of the existing railway to the greatest extent, and the engineering construction period is shortened as much as possible.

According to the conventional technical scheme, the lattice column type spliced bracket is adopted, the specific erection scheme of the lattice column bracket is needed according to the height Cheng Sheji of each node of the steel truss girder, the manufacturing and installation time is long, the manufacturing cost is high, and the requirement can not be met. In addition, lattice column support occupation is great, and the interval between the support is less, and construction space is restricted, and the crossbeam is difficult to transport to hoisting position, and the construction is comparatively difficult.

After the technical scheme provided by the utility model is adopted, the design and the installation of the bracket are simple and efficient, the stress and the stability of the bracket are all satisfied through analysis, compared with the conventional technical scheme, the whole period is shortened to 1/8, the manufacturing cost is reduced to 1/5, the field transportation problem of a large and long rod piece is effectively solved, and the requirements in all aspects are satisfied.

In describing the present utility model and its embodiments, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "height", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model and its embodiments, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrated; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model and its embodiments, unless explicitly specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include both the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The above disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A be used for neighbouring existing railway steel truss to assemble construction support, its characterized in that includes:

a plurality of bored piles (10) arranged in pairs, which are longitudinally arranged in the horizontal ground along the steel truss girder, each bored pile (10) corresponding to a node on the steel truss girder;

the steel pipe column (1) is vertically arranged on the bored pile (10);

the sliding plate (7) is arranged at the top of the steel pipe column (1) through a supporting mechanism with adjustable height, a steel truss girder is arranged on the sliding plate (7), and can slide on the sliding plate (7) when the steel truss girder expands with heat and contracts with cold, so that the stability and the safety of the bracket are prevented from being influenced when the steel truss girder stretches longitudinally;

wherein, the width direction of the steel truss girder is transverse, and the length direction is longitudinal.

2. The construction support for splicing adjacent railway steel trusses according to claim 1 is characterized in that two sides of the steel pipe column (1) are connected with a guy cable snap ring on the ground through a guy cable (3) which is arranged in a diagonal manner, and the overall stability of the support of the steel pipe column (1) is improved.

3. The splicing construction support for the steel trusses adjacent to the existing railway according to claim 1 is characterized in that the sliding plate (7) is a polytetrafluoroethylene plate, temperature force is released, and indirect influence of temperature effect on the support is reduced.

4. A construction bracket for splicing adjacent existing railway steel trusses according to claim 1 or 3, characterized in that the sliding plate (7) is provided with a limiting assembly for limiting the sliding range of the sliding plate (7).

5. A construction bracket for splicing adjacent existing railway steel trusses according to claim 1 wherein the height-adjustable support means comprises:

the column cap (2) is fixedly arranged at the top of the steel pipe column (1);

the supporting component with adjustable elevation is arranged on the column cap (2) and is used for falling beams;

a bolster (5) disposed on the support assembly;

the cushion block (6) is arranged on the cushion beam (5), a sliding plate (7) is arranged on the cushion block (6), and the cushion block (6) is positioned right below the steel truss girder rod node and used for bearing the steel truss girder rod node.

6. The construction bracket for splicing the steel trusses adjacent to the existing railway according to claim 5 is characterized by further comprising a pair of jacks (9) which are arranged on the cushion beams (5) and symmetrically arranged on two sides of the cushion blocks (6), wherein when the elevation of the steel trusses at the individual nodes is lower than the designed elevation, the steel trusses are jacked up by the jacks (9).

7. A construction bracket for splicing steel trusses adjacent to existing railways according to claim 6 characterized in that the jack (9) is arranged at the steel truss node with an elevation lower than the design elevation.

8. The assembly construction bracket for the steel truss girder adjacent to the existing railway according to claim 7, wherein the top of the jack (9) is provided with a steel plate, and the purpose of adjusting elevation is achieved after the steel truss girder is jacked up.

9. The construction support is used for splicing the steel trusses close to the existing railway according to claim 5, wherein the supporting component is a sand box (4), the sand box (4) comprises an inner pressure pipe and an outer sleeve, a bolster (5) is arranged at the top of the inner pressure pipe, the bottom of the inner pressure pipe is installed in the outer sleeve in a matched mode, a sand unloading hole is formed in the bottom of the outer sleeve, sand is filled in the outer sleeve, after the sand is discharged from the sand unloading hole, the inner pressure pipe moves towards the inside of the outer sleeve, and at the moment, the bolster (5) descends to achieve the effect of adjusting the height.

10. The assembly construction bracket for the steel truss girder adjacent to the existing railway according to claim 5, further comprising a distribution beam (8) arranged on the sliding plate (7).