CN211171560U - Steel diagonal brace combined PC beam - Google Patents

Abstract

The utility model relates to a steel diagonal strut combined PC beam. The steel diagonal strut combined PC beam comprises a prestressed concrete box girder and a steel diagonal brace; the upper end of the steel diagonal brace is fixed to the cantilever flange of the prestressed concrete box girder. At the lateral outer end, the lower end of the steel diagonal strut is fixed to the lateral outer end of the bottom plate of the prestressed concrete box girder. Compared with the traditional single box multi-chamber box girder bridge, the material consumption of the upper and lower structures of the bridge is reduced, and the utility model has better performance than the steel box girder bridge. The structural stability of the diagonal struts and their anchors can be prefabricated in the factory, the construction quality can be improved, the construction period can be optimized, and the appearance is beautiful, with significant economic benefits, and has broad application prospects in the field of bridges.

Description

A steel diagonal strut combined PC beam

technical field

The utility model relates to the technical field of bridge construction, in particular to a steel diagonal strut combined PC beam.

Background technique

When the designed bridge width is wide, the section of conventional prestressed concrete box girder bridges is usually designed in the form of a single box and multiple chambers. Simultaneously increase the amount of engineering work, causing a series of problems such as cumbersome pier shape, large amount of concrete construction, and high engineering cost.

In view of the above problems, the structural form of steel box girder can reduce the upper load of the bridge, reduce the workload of bridge site construction, and shorten the construction period. The overturning problem is more prominent.

Therefore, it has become an urgent problem to study a bridge that can meet the design requirements of wider bridges, has greater stiffness, and can reduce the weight of the upper structure of the bridge, reduce the amount of materials, and reduce the workload of on-site construction.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a steel diagonal strut combined PC beam, which can fully utilize the advantages of the prestressed concrete structure and the steel structure, solve the problems of the prior art, the structure is light in weight, and the construction is convenient.

The technical scheme adopted by the utility model is:

A steel diagonal strut combined PC beam, characterized in that:

The steel diagonal strut combined PC beam includes a prestressed concrete box girder and a steel diagonal strut;

The upper end of the steel diagonal brace is fixed to the lateral outer end of the cantilever flange of the prestressed concrete box girder, and the lower end of the steel diagonal brace is fixed to the lateral outer end of the prestressed concrete box girder bottom plate. symmetry.

Anchor beams are arranged throughout the lateral outer ends of the cantilevered flanges of the prestressed concrete box girder, and the upper ends of the steel diagonal struts are fixed to the anchor beams through anchors.

The anchor beams are arranged symmetrically along the centerline of the prestressed concrete box girder.

Anchor blocks are arranged at both lateral ends of the prestressed concrete box girder bottom plate, the anchor blocks are arranged at intervals in the longitudinal direction, and the lower ends of the steel diagonal struts are fixed to the anchor blocks through anchors.

The anchor blocks are arranged symmetrically along the centerline of the prestressed concrete box girder.

The steel diagonal strut is one of section steel, square steel pipe, round steel pipe and steel pipe concrete, and stiffening steel plates are arranged at both ends.

Anchors include anchor bars and anchor plates.

The prestressed concrete box girder includes the prestressed concrete box girder top plate and the prestressed concrete box girder bottom plate. The outer web of the box girder and the transverse ends of the prestressed concrete box girder roof are cantilever flanges of the prestressed concrete box girder.

The utility model has the following advantages:

Compared with the traditional single box multi-chamber box girder bridge, the material consumption of the upper part and the lower structure of the bridge is reduced, and the utility model has better performance compared with the steel box girder bridge. The structural stability of the diagonal struts and their anchors can be prefabricated in the factory, the construction quality can be improved, the construction period can be optimized, and the appearance is beautiful, with significant economic benefits, and has broad application prospects in the field of bridges.

Description of drawings

FIG. 1 is a schematic view of the elevation structure of the steel diagonal strut combined PC beam along the beam length direction of the present invention.

Figure 2 is a schematic diagram of the cross-sectional structure of the steel diagonal strut combined PC beam of the present invention.

FIG. 3 is a schematic structural diagram of the anchorage position of the steel diagonal brace in FIG. 1 and FIG. 2 .

Figure 4 is a schematic diagram of the cross-sectional structure of the anchorage of the steel diagonal strut.

In the figure, 1——prestressed concrete box girder, 1-1——prestressed concrete box girder top plate, 1-2——prestressed concrete box girder bottom plate, 1-3——prestressed concrete box girder middle web, 1 -4—External web of prestressed concrete box girder, 1-5—Cantilever flange of prestressed concrete box girder, 2—Anchor beam, 3—Steel diagonal strut, 4—Anchor block, 5— - Anchors, 5-1 - Anchor bars, 5-2 - Anchor plates, 6 - Stiffening plates.

Detailed ways

The present utility model will be described in detail below in conjunction with specific embodiments.

The utility model relates to a steel diagonal strut combined PC beam, which comprises a prestressed concrete box girder 1 and a steel diagonal strut 3 . The prestressed concrete box girder 1 includes a prestressed concrete box girder top plate 1-1 and a prestressed concrete box girder bottom plate 1-2, and a vertical gap is formed between the prestressed concrete box girder top plate 1-1 and the prestressed concrete box girder bottom plate 1-2. The middle webs 1-3 of the prestressed concrete box girder and the outer webs 1-4 of the prestressed concrete box girder, the top plate 1-1 of the prestressed concrete box girder is the cantilever flanges 1-5 of the prestressed concrete box girder at the transverse ends. . The upper end of the steel diagonal strut 3 is fixed to the lateral outer end of the cantilever flanges 1-5 of the prestressed concrete box girder, and the lower end of the steel diagonal strut 3 is fixed to the lateral outer end of the prestressed concrete box girder bottom plate 1-2. The rods 3 are arranged at intervals along the longitudinal direction and are symmetrical to the left and right.

An anchor beam 2 is arranged through the lateral outer ends of the cantilever flanges 1-5 of the prestressed concrete box girder, and the upper end of the steel diagonal strut 3 is fixed to the anchor beam 2 through an anchor 5 . The anchor beams 2 are arranged symmetrically along the center line of the prestressed concrete box girder 1 .

Anchor blocks 4 are arranged at both lateral ends of the prestressed concrete box girder bottom plate 1-2, and the anchor blocks 4 are arranged at intervals in the longitudinal direction. The anchor blocks 4 are symmetrically arranged along the center line of the prestressed concrete box girder 1 . The anchor blocks 4 are connected together by ordinary steel bars of the beam body, and are evenly arranged at intervals of 2m to 10m.

The steel diagonal strut 3 is one of section steel, square steel pipe, round steel pipe, and concrete-filled steel tube. The two ends are provided with stiffening steel plates 6. The stiffening plates 6 are evenly arranged along the outer circumference of the steel diagonal strut 3. The stiffening plates 6 and the steel The diagonal strut 3 and the anchor plate 5-2 are connected by welding.

The anchor 5 includes an anchor bar 5-1 and an anchor plate 5-2, which are connected by welding, and the steel diagonal strut 3 and the anchor plate 5-2 are connected by welding or by bolts.

The construction method of the above-mentioned steel diagonal strut combined PC beam is characterized in that:

Include the following steps:

Step 1: Process the steel diagonal strut 3, the stiffening plate 6, the anchor bar 5-1 and the anchor plate 5-2 according to the design requirements; and connect the components into a whole according to the designed connection method;

Step 2: Bind prestressed concrete box girder 1, anchor beam 2 and anchor block 4 steel bars on the support formwork, and position and install steel diagonal struts 3, stiffening plates 6, anchor bars 5-1 and anchor plates 5- 2 integral components composed of;

Step 3: pour the beam concrete;

Step 4: After the concrete strength reaches the design strength, the prestressed tension is carried out to form a steel diagonal strut combined PC beam.

The steel diagonal strut combined PC beam and the construction method thereof of the utility model fully utilize the advantages of the prestressed concrete structure and the steel structure, have beautiful appearance, clear force, convenient construction, significant economic benefits, and have excellent economic benefits in the field of bridges. Broad application prospects.

The content of the present invention is not limited to those listed in the embodiments, and any equivalent transformations taken by those of ordinary skill in the art to the technical solutions of the present invention by reading the description of the present invention are covered by the claims of the present invention.

Claims (8)

1. The utility model provides a steel diagonal brace combination PC roof beam which characterized in that:

the steel diagonal brace combined PC beam comprises a prestressed concrete box beam (1) and a steel diagonal brace (3);

the upper ends of the steel diagonal braces (3) are fixed to the transverse outer ends of the cantilever flanges (1-5) of the prestressed concrete box girder, the lower ends of the steel diagonal braces (3) are fixed to the transverse outer ends of the prestressed concrete box girder bottom plates (1-2), and the steel diagonal braces (3) are longitudinally arranged at intervals and are bilaterally symmetrical.

2. The steel diagonal stay combined PC beam of claim 1, wherein:

the transverse outer end of the cantilever flange (1-5) of the prestressed concrete box girder is provided with an anchor beam (2) in a through length mode, and the upper end of the steel diagonal brace (3) is fixed on the anchor beam (2) through an anchoring part (5).

3. The steel diagonal stay combined PC beam of claim 2, wherein:

the anchor beams (2) are symmetrically arranged along the center line of the prestressed concrete box girder (1).

4. The steel diagonal stay combined PC beam of claim 3, wherein:

the horizontal both ends of prestressed concrete box girder bottom plate (1-2) are provided with anchor block (4), and anchor block (4) longitudinal interval arranges, and steel diagonal brace (3) lower extreme is fixed in anchor block (4) through anchor assembly (5).

5. The steel diagonal stay combined PC beam of claim 4, wherein:

the anchor blocks (4) are symmetrically arranged along the center line of the prestressed concrete box girder (1).

6. The steel diagonal stay combined PC beam of claim 5, wherein:

the steel diagonal brace (3) is one of section steel, square steel pipe, round steel pipe and steel pipe concrete, and stiffening steel plates (6) are arranged at two ends.

7. The steel diagonal stay combined PC beam of claim 6, wherein:

the anchoring piece (5) comprises an anchor bar (5-1) and an anchor plate (5-2).

8. The steel diagonal stay combined PC beam of claim 7, wherein:

the prestressed concrete box girder (1) comprises a prestressed concrete box girder top plate (1-1) and a prestressed concrete box girder bottom plate (1-2), wherein a vertical prestressed concrete box girder middle web plate (1-3) and a vertical prestressed concrete box girder outer web plate (1-4) are arranged between the prestressed concrete box girder top plate (1-1) and the prestressed concrete box girder bottom plate (1-2), and prestressed concrete box girder cantilever flanges (1-5) are arranged at the two transverse ends of the prestressed concrete box girder top plate (1-1).

Images