CN212688662U

CN212688662U - Box girder construction that bearing strength is high

Info

Publication number: CN212688662U
Application number: CN202021258204.2U
Authority: CN
Inventors: 秦虎全; 张友强; 张本进; 阎志; 何勤
Original assignee: Hubei Qiangjin Metal Structure Manufacturing Co ltd
Current assignee: Hubei Qiangjin Metal Structure Manufacturing Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-03-12
Anticipated expiration: 2030-06-30

Abstract

The utility model provides a box girder structure with high bearing strength, the box girder comprises a top plate, a bottom plate, side plates and flange plates, a partition plate is further arranged between the top plate and the bottom plate, the partition plate divides the space between the top plate and the bottom plate into an upper load layer and a lower supporting layer, a load bearing mechanism is further arranged in the load layer, the load bearing mechanism comprises a plurality of hollow prismatic table supporting structures arranged in parallel, and a buffer supporting plate is arranged in the supporting layer; the hollow prismatic table structures arranged in the load layer of the utility model form a more stable prismatic table structure when mutually inclining, thereby improving the structural strength and better dispersing and bearing the load of the upper pavement; the utility model discloses in still including the supporting layer, the inside buffering backup pad that is provided with of supporting layer to provide a part that supports and cushion between the load layer of pier post and top, let the load of load pass through the dispersion back and transmit again for the pier post, avoid local pressure too big.

Description

Box girder construction that bearing strength is high

Technical Field

The utility model relates to a bridge construction technical field, concretely relates to box girder construction that bearing strength is high.

Background

The box girder is one of the middle girders in bridge engineering, the inner part of the box girder is hollow, and flanges are arranged on two sides of the upper part of the box girder and are similar to a box, so that the box girder is named. Single boxes, multiple boxes, etc. The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-place box girder. The box girder prefabricated in the independent site can be erected after the lower project is finished by combining the bridge girder erection machine, so that the project progress can be accelerated, and the construction period can be saved; cast-in-place box girders are mostly used for large continuous bridges.

The box girder is a structural form commonly adopted in engineering, in order to research the influence of the distance between the transverse clapboards on the distortion of the simply supported steel box girder under the action of concentrated load, the simply supported steel box girders with different numbers of transverse clapboards are arranged, the distortion effect and the rigid torsion effect of the simply supported steel box girders under the action of the concentrated load are compared, the concentrated load is applied to the top end of a box girder web plate by a maximum distortion effect along with the change curve of the number of the transverse clapboards, and the load decomposition method is adopted for calculation according to four working conditions of distortion, rigid torsion, symmetric bending and eccentric load.

In the existing box girder structure, the whole structure is simple, so that the bearing capacity is still deficient, and particularly, the load dispersion degree of a central area in the interior of a box girder with a large hollow area is insufficient, so that a top plate in the middle is stressed too much and is easy to damage; in addition, mainly transmit surface gravity to bottom plate and pier stud below through the curb plate among the box girder structure, this makes gravity concentrate on both ends about the curb plate, and tie point pressure is too big, and the possibility that local damage appears becomes high, also does not benefit to the long-term use of box girder structure.

SUMMERY OF THE UTILITY MODEL

Not enough to exist among the prior art, the utility model provides a box girder construction that bearing strength is high for bearing capacity is not enough in solving current box girder construction, the roof atress is too big easy to be damaged, curb plate end pressure is too big to be unfavorable for long-term use scheduling problem.

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

a box girder structure with high bearing strength comprises a top plate, a bottom plate and side plates arranged between the top plate and the bottom plate, wherein the top plate, the bottom plate and the side plates are surrounded into a hollow semi-closed structure;

the cross-sectional shape of the supporting layer is matched with that of the load layer, so that the supporting layer integrally forms a trapezoidal structure, the thickness of the supporting layer is smaller than that of the load layer, and the buffer supporting plate is arranged in the supporting layer and tightly fills all spaces in the supporting layer.

Furthermore, cavity terrace with edge bearing structure is cavity terrace with edge, the bottom surface of cavity terrace with edge is isosceles triangle, and on one side that corresponds the bottom surface set up the terminal surface on load layer, equal symmetry setting between arbitrary two adjacent cavity terrace with edge.

Further, the buffering supporting plate is a honeycomb structure with an upward vertical opening.

Furthermore, still be provided with the induced air board on the lateral surface of curb plate, the induced air board is cavity light structure, and the centre of induced air board is protruding, and upper and lower both sides are the concave surface arc respectively and extend to the upper and lower both ends of curb plate from inside to outside.

Furthermore, the both sides of bottom plate still are provided with respectively and block the head, block the head and hug closely the lateral surface of bottom pier stud under the orientation for two of both sides block the head and press from both sides and establish on the pier stud.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses divide the hollow structure in the case roof beam into load layer and the supporting layer that sets up from top to bottom, wherein be provided with hollow terrace with edge structure in the load layer, thereby added a large amount of support nature structures in load layer under the condition of not too much increase weight, the holding surface of these support nature structures constitutes comparatively stable terrace with edge structure when mutually inclining simultaneously, has further improved structural strength, can better dispersion undertake the load of upper road surface;

2. the utility model discloses in still including the supporting layer, the inside buffering backup pad that is provided with of supporting layer to provide a part that supports and cushion between the load layer of pier post and top, let the load of load pass through the dispersion back and transmit again for the pier post, avoid local pressure too big.

Drawings

Fig. 1 is a schematic end view of the present invention;

fig. 2 is a schematic top view of the load bed of the present invention;

fig. 3 is a schematic top view of the buffering supporting plate of the present invention;

in the figure: 1. a top plate; 2. a base plate; 3. a side plate; 4. a partition plate; 5. a load-bearing layer; 6. a support layer; 21. a blocking head; 31. an air induction plate; 51. a hollow triangular table; 61. buffer the backup pad.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

Example (b):

as shown in fig. 1, the utility model provides a box girder structure that bearing strength is high, the box girder includes roof 1, bottom plate 2 and sets up curb plate 3 between roof 1 and bottom plate 2, roof 1, bottom plate 2 and curb plate 3 enclose into hollow semi-enclosed structure, still include the flange board that stretches out from roof 1 both ends. Wherein bottom plate 2 is used for being connected with the pier stud, sets up the bridge floor structure on roof 1, and whole case roof beam plays the effect of transmitting the load of bridge floor for the pier stud.

As shown in fig. 2, in this embodiment, a partition plate 4 is further disposed between the top plate 1 and the bottom plate 2, the partition plate 4 partitions a space between the top plate 1 and the bottom plate 2 into an upper load layer 5 and a lower support layer 6, a cross section of the load layer 5 is shaped like an isosceles trapezoid with a long side on the upper side, and a force bearing mechanism is further disposed inside the load layer 5 and includes a plurality of hollow prismatic table support structures disposed in parallel. In the preferred scheme of this embodiment, the hollow prismoid support structure is a hollow prismoid 51, the bottom surface of the hollow prismoid 51 is an isosceles triangle, and one side of the corresponding bottom surface is provided with the end surface of the load layer 5, any two adjacent hollow prismoids 51 are symmetrically arranged, and because only two hollow prismoids 51 are arranged inside one box girder in this embodiment, the bottom vertex angles of the two hollow prismoids 51 are arranged oppositely.

The supporting structure formed by the combination of the hollow triangular platforms 51 can add a large amount of supporting effect in the load layer 5 under the condition of not increasing the weight too much, the side surfaces of the triangular platforms are used as supporting surfaces, and due to the inclined arrangement, the upper load can be respectively transmitted to different areas on the bottom plate 2, so that the stress surface of the bottom plate 2 is enlarged; in addition, the triangular table is of a stable structure, the structural strength inside the box girder is further improved, and the load of the upper pavement can be better dispersed and borne.

As shown in fig. 3, in a further scheme, the cross-sectional shape of the supporting layer 6 is matched with that of the load layer 5, so that the supporting layer 6 integrally forms a trapezoidal structure, the thickness of the supporting layer 6 is smaller than that of the load layer 5, and a buffer support plate 61 is arranged inside the supporting layer 6, and the buffer support plate 61 tightly fills the whole space in the supporting layer 6. Preferably, the buffering backup pad 61 is the honeycomb structure of opening vertical setting up, and the buffering backup pad 61 through honeycomb structure can be under the less prerequisite of gaining weight the pressure between very big dispersion bottom pier and the top bridge floor, plays certain vertical buffering effect simultaneously.

In a preferable scheme of this embodiment, an air guide plate 31 is further disposed on the outer side surface of the side plate 3, the air guide plate 31 is of a hollow light structure, the middle of the air guide plate 31 is convex, and the upper side and the lower side of the air guide plate 31 extend to the upper end and the lower end of the side plate 3 from inside to outside in a concave arc shape; lateral wind force can be guided above or below the deck and the box girder by the induced draft plate 31, thereby reducing lateral wind pressure. Furthermore, two sides of the bottom plate 2 are respectively provided with a blocking head 21, the blocking heads 21 face to the right lower side and are tightly attached to the outer side surface of the bottom abutment column, so that the two blocking heads 21 on the two sides are clamped on the abutment column; the blocking head 21 can enhance the torsion resistance of the box girder and the abutment pillar in the side direction, and reduce the possibility of toppling.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a box girder construction that bearing strength is high, the box girder includes roof, bottom plate and the curb plate of setting between roof and bottom plate, roof, bottom plate and curb plate enclose into hollow semi-enclosed structure, still include the flange board that stretches out from the roof both ends, its characterized in that: a partition plate is further arranged between the top plate and the bottom plate, the partition plate divides the space between the top plate and the bottom plate into an upper load layer and a lower support layer, the cross section of the load layer is in the shape of an isosceles trapezoid with the long side on the upper side, a force bearing mechanism is further arranged in the load layer, and the force bearing mechanism comprises a plurality of hollow prismatic table support structures which are arranged in parallel;

2. A box girder construction of high load-bearing strength according to claim 1 wherein: the hollow prismatic table supporting structure is a hollow prismatic table, the bottom surface of the hollow prismatic table is an isosceles triangle, one side of the bottom surface is corresponding to the end surface of the load layer, and any two adjacent hollow prismatic tables are symmetrically arranged.

3. A box girder construction of high load-bearing strength according to claim 1 wherein: the buffering backup pad is the honeycomb structure of opening vertical setting up upwards.

4. A box girder construction of high load-bearing strength according to claim 1 wherein: the side plate is characterized in that an air guide plate is further arranged on the outer side face of the side plate, the air guide plate is of a hollow light structure, the middle of the air guide plate is convex, and the upper side and the lower side of the air guide plate are respectively concave arc-shaped from inside to outside and extend to the upper end and the lower end of the side plate.

5. A box girder construction of high load-bearing strength according to claim 1 wherein: the both sides of bottom plate still are provided with respectively and block the head, block the head and hug closely the lateral surface of bottom pier stud under the orientation for two of both sides block the head and press from both sides and establish on the pier stud.