CN111321660A - A W-shaped pier - Google Patents

Abstract

The invention discloses a W-shaped pier which comprises an upper pier body, a lower pier body and a bent cap, wherein the upper pier body is W-shaped, the top of the upper pier body is connected with the bent cap, the bottom of the upper pier body is connected with the lower pier body, and the lower pier body is a double-column pier. By applying the W-shaped pier, the upper pier body at the upper part is W-shaped, so that the support arrangement of a wide girder bridge can be better adapted, the cantilever arm is shorter, the stress is reasonable, the defect of the traditional Y-shaped single-column pier in the wide girder bridge is effectively overcome, the construction is convenient, the pier is provided with a cavity, and the material is saved; meanwhile, the lower pier body is a double-column pier, and compared with a three-column pier or large-volume pier body design adopted by a traditional wide beam bridge, the lower pier body can also achieve the effects of saving the ground under the bridge and reducing the construction cost; the W-shaped pier is simple in structure, convenient to manufacture and good in effect.

Description

A W-shaped pier

technical field

The invention relates to the field of bridges, in particular to a W-shaped pier.

Background technique

Bridges are the lifelines of transportation. With the rapid development of the national economy, the traffic flow has increased sharply. The construction of high-speed railways, expressways, urban municipal roads and urban rail transit, and more and more bridges use roads, railways (rail transit) The joint construction has brought huge challenges to the construction of urban bridges. In the design process, while satisfying the stress, it is not only necessary to consider the impact of limited land resources, but also to avoid various underground pipelines and various buildings and structures in the city. Therefore, how to effectively optimize the structure of the bridge pier, the maximum It has become an indispensable part of bridge design to ensure that the bridge is beautiful while meeting the needs of passage under the bridge.

On the other hand, in order to adapt to the rapid development of urban traffic and the continuous widening of roads, multi-lane, highway-rail dual-purpose equal-width girder bridges were born accordingly, playing an increasingly important role in the design and construction. In the current bridge engineering, the substructure design of wide-body bridges mostly adopts the form of Y-shaped single-column pier 03 as shown in Figure 1 or three-column pier 04 as shown in Figure 2. Various types of Y-shaped single-column piers 03 with a wide upper and a lower bottom have the advantages of beautiful shape and simplicity, good visibility under the bridge, and little construction interference. However, when they are applied to wide-body bridges, the construction difficulty will be increased. At the same time, the large-volume pier body will make the whole bridge appear too bloated, and it will also cause waste of materials, which is not conducive to saving and cost control. Compared with the single-column pier, the three-column pier 04 can save some engineering materials, but it requires more land under the bridge, which is not conducive to the traffic planning of the entire city.

SUMMARY OF THE INVENTION

The purpose of the present invention is: the construction of the Y-shaped single-column pier used for the wide girder bridge existing in the prior art is difficult, which is not conducive to material saving and cost control. At the same time, the three-column pier needs more land under the bridge, which is not conducive to the whole The problem of urban traffic planning provides a W-shaped pier.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A W-shaped bridge pier comprises an upper pier body, a lower pier body and a cover beam, the upper pier body is W-shaped, the top of the upper pier body is connected to the cover beam, and the bottom of the upper pier body is connected to the lower pier The body of the lower pier is a double-column pier.

With the W-shaped bridge pier of the present invention, the upper pier body in the upper part is W-shaped, which can better adapt to the bearing arrangement of the wide-body girder bridge, and the cantilever arm is short and the force is reasonable, which effectively compensates for the traditional Y-shaped bridge. The insufficiency of the single-column pier in the wide-body girder bridge is convenient for construction, has its own cavity, and saves materials; at the same time, the lower pier in the lower part is a double-column pier, which is compared with the three-column pier used in the traditional wide-body girder bridge. In terms of design of large-volume pier body, it can also achieve the effect of saving the land under the bridge and reducing the project cost; the W-shaped pier has a simple structure, is convenient to manufacture, and has a good effect.

Preferably, the upper pier body includes an intermediate strut and an oblique strut, the intermediate strut is in an inverted V shape or an inverted U shape, the oblique struts are arranged on both sides of the intermediate strut, and the oblique struts are The bottom of the strut is connected to the bottom of the middle strut.

Preferably, the lower pier body is a hollow pier.

Preferably, the lower pier body is connected to the bearing platform.

Preferably, the cover beams are used for setting railway main beams and/or highway main beams.

Preferably, the upper pier body and the lower pier body are integrally formed structures of cast-in-place reinforced concrete.

Preferably, the upper pier body is a steel structure, and the lower pier body is a prefabricated reinforced concrete structure or a cast-in-place reinforced concrete structure.

Preferably, the upper pier body is a steel structure, and the lower pier body is a steel structure.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present invention are:

1. In the W-shaped bridge pier of the present invention, the upper pier body is W-shaped, which can better adapt to the bearing arrangement of the wide-body girder bridge, and the cantilever arm is short and the force is reasonable, which effectively makes up for the traditional The Y-shaped single-column pier is insufficient in the wide-body girder bridge, which is convenient for construction. The hollow design of the W-shaped curved line improves the overall appearance of the bridge, avoids the waste of materials caused by large piers, and has obvious economic benefits; Compared with the three-column pier or the large-volume pier body design used in the traditional wide-body girder bridge, the column pier can also save the land under the bridge and reduce the engineering cost; the W-shaped pier has a simple structure and is convenient to manufacture. good effect;

2. In a W-shaped bridge pier according to the present invention, the upper pier body and the lower pier body are an integrally formed structure of cast-in-place reinforced concrete, or the upper pier body is a steel structure and the lower pier body is a cast-in-place reinforced concrete structure. Prefabricated reinforced concrete structure or cast-in-place reinforced concrete structure, or the upper pier body is a steel structure, the lower pier body is a steel structure and other combinations, the choice of plan is flexible, which can realize the high efficiency of factory processing production and on-site construction Combination, reduce the difficulty of construction, improve the quality of the project, while reducing labor costs.

Description of drawings

Figure 1 is a schematic structural diagram of an existing Y-shaped single-column pier wide-body bridge;

Figure 2 is a schematic structural diagram of an existing three-column pier wide-body bridge;

Fig. 3 is the structural representation of the W-shaped bridge pier of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 .

Icons: 01-railway main beam, 02-highway main beam, 03-Y-shaped single-column pier, 04-three-column pier, 1-upper pier body, 11-intermediate strut, 12-diagonal strut, 2-cover beam , 3 - lower pier body, 4 - cap.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example

As shown in Figure 3-4, a bridge is designed with a total length of 1742.10m, and the main bridge is a steel box cable-stayed bridge. The full bridge hole-span layout is: 9×40.0m (approach bridge)+(72.5+203+522+203+42.5)m (main bridge)+8×40.m (approach bridge)=1743.3m. Among them, the length of the main bridge cable-stayed bridge is 1043m, and the span arrangement is: (72.5+203+522+203+42.5)m.

The total width of the bridge deck is 63.9m, and a total of four-line railways and six-lane highways are set up. The main beam of the main bridge adopts steel box girder and channel-shaped steel-concrete composite girder. The standard section 01 of the railway main girder is a steel box girder with a beam width of 23.5m. The full length of beam 02 is a channel-shaped steel-concrete combined beam, and the beam width is 15m. The main bridge adopts the reinforced concrete diamond-shaped cable tower, the stay cables are arranged according to the space double cable plane, and the approach bridge adopts the W-shaped bridge pier of the present invention.

As shown in Figure 3, the W-shaped pier includes an upper pier body 1, a lower pier body 3 and a cover beam 2. The top of the upper pier body 1 is connected to the cover beam 2, and the bottom of the upper pier body 1 is connected to the lower pier body 1. The pier body 3, the lower pier body 3 is connected to the bearing platform 4, and the cover beam 2 is used to set the railway main beam 01 and the highway main beam 02.

The upper pier body 1 includes a middle strut 11 and an oblique strut 12, the middle strut 11 is in an inverted V shape or an inverted U shape, and the diagonal strut 12 is arranged on both sides of the middle strut 11, and The bottom of the diagonal strut 12 is connected to the bottom of the intermediate strut 11 , so that the upper pier body 1 is W-shaped. Two highway main beams 02, the relatively small highway main beam 02 load is transmitted through the diagonal struts 12 on the outer side of the upper pier body 1, and the middle railway main beam 01 and its four lines are transmitted through the intermediate struts 11 train load.

As shown in FIG. 4 , the lower pier body 3 is a double-column hollow pier, and the cross-section is D-shaped; the upper W-shaped upper pier body 1 transitions with the lower column-type lower pier body 3 at the root.

The upper pier body 1 and the lower pier body 3 are integrally formed structures of cast-in-place reinforced concrete, or the upper pier body 1 is a steel structure and the lower pier body 3 is a prefabricated reinforced concrete structure or a cast-in-place reinforced concrete structure. Structure, or the upper pier body 1 is a steel structure, the lower pier body 3 is a steel structure and other combination forms, the scheme selection is flexible, and the efficient combination of factory processing production and on-site construction can be realized, reducing construction difficulty and improving. At the same time of engineering quality, labor costs are reduced.

Using the W-shaped bridge pier of the present invention, the upper pier body 1 in the upper part is W-shaped, which can better adapt to the bearing arrangement of the wide-body girder bridge, and the cantilever arm is short and the force is reasonable, which effectively makes up for the traditional The Y-shaped single-column pier is insufficient in the wide-body girder bridge, which is convenient for construction, has its own cavity, and saves materials; at the same time, the lower pier body 3 in the lower part is a double-column pier, which is compared with the three-column pier used in the traditional wide-body girder bridge. In terms of column pier or large-volume pier body design, it can also achieve the effect of saving the land under the bridge and reducing the engineering cost; the W-shaped pier can reasonably distribute the load of the upper three main beams to the three braces and pass through the three braces. The rod is evenly transmitted to the lower pier body 3, and then to the foundation of the bearing platform 4, so that the load transmission path of the whole structure is clearer, the force is more clear, and the overall landscape effect of the bridge is also improved, and its structure is simple , the manufacture is convenient and the effect is good.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (8)

1. A W-shaped bridge pier, characterized in that it comprises an upper pier body (1), a lower pier body (3) and a cover beam (2), the upper pier body (1) is W-shaped, and the upper pier body (1) is W-shaped. (1) The top is connected to the cover beam (2), the bottom of the upper pier body (1) is connected to the lower pier body (3), and the lower pier body (3) is a double-column pier. 2. The W-shaped bridge pier according to claim 1, characterized in that, the upper pier body (1) comprises a middle strut (11) and a diagonal strut (12), and the middle strut (11) is inverted V-shaped or inverted U-shaped, the diagonal struts (12) are arranged on both sides of the intermediate strut (11), and the bottom of the diagonal strut (12) is connected to the bottom of the intermediate strut (11). 3. The W-shaped bridge pier according to claim 1, wherein the lower pier body (3) is a hollow pier. 4. The W-shaped bridge pier according to claim 1, wherein the lower pier body (3) is connected to the bearing platform (4). 5. The W-shaped pier according to claim 1, characterized in that, the cover beam (2) is used for setting a railway main beam (01) and/or a highway main beam (02). 6 . The W-shaped bridge pier according to claim 1 , wherein the upper pier body ( 1 ) and the lower pier body ( 3 ) are integrally formed structures of cast-in-place reinforced concrete. 7 . 7. The W-shaped pier according to any one of claims 1-5, wherein the upper pier body (1) is a steel structure, and the lower pier body (3) is a prefabricated reinforced concrete structure or a cast-in-place structure reinforced-concrete structure. 8. The W-shaped bridge pier according to any one of claims 1-5, wherein the upper pier body (1) is a steel structure, and the lower pier body (3) is a steel structure.

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