CN214301204U

CN214301204U - Heavy bearing box girder

Info

Publication number: CN214301204U
Application number: CN202022615061.2U
Authority: CN
Inventors: 李志鑫; 姚俊飞; 潘利群; 陈士勇
Original assignee: Hangzhou Zhongshui Technology Co ltd
Current assignee: Hangzhou Zhongshui Technology Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-09-28
Anticipated expiration: 2030-11-12

Abstract

A heavy load-bearing box girder comprises a plurality of box girder sections, wherein adjacent box girder sections are connected through box girder section connecting plates; the box girder section that the symmetry was laid passes through the main beam and connects, the utility model discloses compare truss structure, the height that can effectively reduce the main bridge makes the bridge floor space wider to have good bending resistance and torsional property, its stability is also splendid.

Description

Heavy bearing box girder

Technical Field

The utility model belongs to tunnel construction field especially relates to a heavy bearing box roof beam.

Background

In the high-speed railway tunnel work progress, large-scale removal landing stage is the main construction equipment who decides the engineering progress, when satisfying the safety of tunnel construction, passing through fast, does not hinder the pre-buried filling of excavation back tunnel again. The movable trestle is required to have the characteristics of high bearing capacity, high strength, large span, self-powered property, capability of automatically moving along with the construction progress and the like.

The box girder is the main structure of the longitudinal girder of the trestle that appears in recent years, mainly utilizes the steel sheet to weld into box structure, and the box girder takes shape after, bending resistance and torsional properties are strong, and its vertical and horizontal two directions's mechanical properties are better, compares truss structure, can effectively reduce the height of main bridge, and the bridge floor space is wider.

The tunnel construction trestle has the basic characteristic requirements of large span, strong bearing capacity, small deflection deformation and the like, and the core problem in the design process of the box girder is formed by how to configure a proper box type structure.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome the defect among the above-mentioned prior art, provide a heavy bearing box roof beam that bending resistance and antitorque performance are strong and have good stability.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a heavy load-bearing box girder comprises a plurality of box girder sections, wherein adjacent box girder sections are connected through box girder section connecting plates; the box girder sections which are symmetrically distributed are connected through the main cross beam.

As a preferred scheme of the utility model, the case roof beam section includes case roof beam section frame, has laid a plurality of case roof beam cavity cross-section floor in the case roof beam section frame, and case roof beam cavity cross-section floor connects in case roof beam section frame through connecting the reinforcing plate.

As a preferred scheme of the utility model, case roof beam total cross-section floor has been laid at case roof beam section frame both ends, and case roof beam total cross-section floor connects in case roof beam section frame through connecting the reinforcing plate.

As an optimal scheme of the utility model, laid case roof beam longitudinal section floor between the adjacent case roof beam cavity cross-section floor, laid case roof beam longitudinal section floor between case roof beam cavity cross-section floor and the case roof beam full cross-section floor, laid case roof beam longitudinal section floor between the adjacent case roof beam full cross-section floor.

As an optimized scheme of the utility model, case roof beam longitudinal section floor is the L type.

As a preferred scheme of the utility model, case roof beam section connecting plate includes two at least top connecting plates and two at least bottom connecting plates, and adjacent case roof beam section frame width direction is connected through inside and outside top connecting plate and the bottom connecting plate of laying.

As a preferred scheme of the utility model, case roof beam section connecting plate includes two at least inboard connecting plates and two at least outside connecting plates, and adjacent case roof beam section frame length direction is connected through the inboard connecting plate and two outside connecting plates of laying inside and outside.

As an optimized scheme of the utility model, laid the round pin shaft hole that is used for with external connection on the case roof beam section frame.

As an optimized scheme of the utility model, the main beam includes a plurality of horizontal reinforcing floor, and a plurality of second reinforcing floor is laid in the horizontal reinforcing floor.

As a preferred scheme of the utility model, lay the horizontal end connection reinforcing plate that is used for increasing joint strength between case roof beam section and the main beam, lay the inboard limiting plate that is used for spacing crossbeam below the reinforcing plate is connected to horizontal end.

The utility model has the advantages that:

1. the utility model provides a pair of lay case roof beam full cross-section floor and case roof beam cavity cross-section floor in the case roof beam section frame of heavy bearing box roof beam, the torsional deformation that resists the case roof beam cross-section that can be better for the case roof beam has better bending resistance moment and antitorque commentaries on classics ability, strengthens the stability of structure.

2. The utility model provides a pair of heavy bearing box roof beam's a plurality of case roof beam section is as main bearing structure, and the symmetry is laid into double-box roof beam section structure, and the landing stage leads to the area and adopts a plurality of main beam connection structure, and this structural design's heavy bearing box roof beam possesses better bending resistance antitorque property.

3. The utility model provides a pair of box girder total cross-section floor and box girder cavity cross-section floor of box girder section inside of heavy bearing box girder, the axis of main beam is unanimous, when the vehicle is current, can transmit the load of vehicle better for vertical box girder section through the main beam.

4. The utility model provides a truss structure is compared to heavy bearing box's structure, can effectively reduce the height of main bridge, makes the bridge floor space wider.

Drawings

Fig. 1 is a schematic structural diagram 1 of an embodiment of the present invention;

fig. 2 is a schematic structural diagram 2 of an embodiment of the present invention;

fig. 3 is a partial enlarged view a of the structure diagram 2 according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram 3 of an embodiment of the present invention;

fig. 5 is a partial enlarged view B of the schematic structural diagram 3 according to the embodiment of the present invention;

FIG. 6 is a schematic structural view of a full cross-section rib plate of a box girder according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a rib plate with a hollow cross section of a box girder according to an embodiment of the present invention;

reference numbers in the figures: the box girder comprises a box girder section 1, a box girder section connecting plate 3, a main crossbeam 4, a box girder hollow section rib plate 12, a box girder full section rib plate 13, a connecting reinforcing plate 14, a box girder longitudinal section rib plate 15, a pin shaft hole 16, a box girder section frame 17, an inner side connecting plate 31, a top connecting plate 32, an outer side connecting plate 33, a bottom connecting plate 34, a transverse reinforcing rib plate 41, a crossbeam inner side limiting plate 42, a transverse end connecting reinforcing plate 43 and a second reinforcing rib plate 44.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the accompanying drawings.

As shown in fig. 1-7, a heavy load-bearing box girder comprises a plurality of box girder segments 1, wherein the length of each box girder segment is preferably 9.5m, and adjacent box girder segments 1 are connected through box girder segment connecting plates 3; the box girder sections 1 which are symmetrically arranged are connected through the main cross beam 4, the box girder sections 1 are used as main bearing structures and are symmetrically configured into a double-box girder section 1 structure, and the main cross beam 4 is adopted for connection in the trestle passing area, so that better bending resistance and torsion resistance are obtained.

Further, the box girder section 1 comprises a box girder section framework 17, a plurality of box girder hollow section rib plates 12 are distributed on the main cross beam 4 in the box girder section framework 17, two ends of each box girder hollow section rib plate 12 are abutted against the inner surface of the box girder section framework 17, and the box girder hollow section rib plates 12 are connected in the box girder section framework 17 through connecting reinforcing plates 14; the box girder full-section rib plates 13 are distributed at two ends of the box girder section framework 17, two ends of each box girder full-section rib plate 13 are abutted against the inner surface of the box girder section framework 17, the box girder full-section rib plates 13 are connected into the box girder section framework 17 through the connecting reinforcing plates 14, and the design of the box girder hollow section rib plates 12 reduces the overall weight of the box girder; the adjacent box girder hollow section rib plates 12 and the box girder section frames 17, the adjacent box girder full section rib plates 13 and the box girder section frames 17, the box girder hollow section rib plates 12, the box girder full section rib plates 13 and the box girder section frames 17 can form a beam structure with a square section, and the beam structure hardly has obvious influence on deformation deflection of the box girder, but can increase the stability of the structure.

Furthermore, box girder longitudinal section rib plates 15 are distributed between adjacent box girder hollow section rib plates 12, box girder longitudinal section rib plates 15 are distributed between the box girder hollow section rib plates 12 and the box girder full section rib plates 13, box girder longitudinal section rib plates 15 are distributed between the adjacent box girder full section rib plates 13, various rib plates inside the box girder section 1 are consistent with the central axis of the main beam 4, and the load of the passing vehicle is guaranteed to be transmitted to the longitudinal box girder section 1 through the beam 4. In the process, the box girder hollow section rib plate and the box girder full-section rib plate in the box girder section 1 can better resist the torsional deformation of the box girder section, so that the box girder has better bending resistance and torsion resistance, and the stability of the structure is enhanced.

Further, the box girder section connecting plates 3 include at least two top connecting plates 32 and at least two bottom connecting plates 34, and the width directions of the adjacent box girder section frames 17 are connected by the top connecting plates 32 and the bottom connecting plates 34 arranged inside and outside. Case roof beam section connecting plate 3 includes two at least inboard connecting plates 31 and two at least outside connecting plates 33, adjacent case roof beam section frame 17 length direction is connected through inboard connecting plate 31 and two outside connecting plates 33 that lay inside and outside, the connecting plate is with two sections adjacent case roof beam plate clamps in the centre, connect through high strength bolt, guarantee to stabilize between the adjacent case roof beam section 1 and connect, case roof beam section frame 17 has laid the round pin shaft hole 16 that is used for with external connection, guarantee that case roof beam section frame 17 stabilizes and external connection.

Further, main beam 4 includes a plurality of horizontal rib plate 41, lay a plurality of second rib plate 44 in the horizontal rib plate 41, lay the horizontal end that is used for increasing joint strength between case roof beam section 1 and the main beam 4 and connect reinforcing plate 43, horizontal end is connected reinforcing plate 43 below and is laid and is used for spacing inboard limiting plate 42 of crossbeam, second rib plate 44 increases the stability of structure, it is unanimous with the axis of main beam 4 to be used for spacing inboard limiting plate 42 of crossbeam to have guaranteed that the various floor of case roof beam section 1 inside is unanimous, transmit the load of the vehicle of passing through main beam 4 for vertical case roof beam section 1 better.

When a heavy-duty load-bearing box girder is specifically implemented: at the entrance of the tunnel, the ballast earthwork is removed, the heavy load-bearing box girder is assembled, the concrete is filled, when the concrete is hardened to meet the requirement, the vehicle can run on the trestle, the vehicle runs on the trestle and transmits the weight of the vehicle to the longitudinally symmetrical box girder section 1 through the main cross beam 4, in the process, the box girder hollow cross section rib plate 12 and the box girder full cross section rib plate 13 in the box girder section 1, and the transverse reinforcement rib plate 41 and the second reinforcement rib plate 44 in the box girder section 1 correspondingly bear the weight of the vehicle.

Although the reference numerals in the figures are used more here: the box girder section 1, the box girder section connecting plate 3, the main beam 4, the box girder hollow section rib 12, the box girder full section rib 13, the connecting reinforcement plate 14, the box girder longitudinal section rib 15, the pin shaft hole 16, the box girder section frame 17, the inner side connecting plate 31, the top connecting plate 32, the outer side connecting plate 33, the bottom connecting plate 34, the transverse reinforcement rib 41, the beam inner side limiting plate 42, the transverse end connecting reinforcement plate 43, the second reinforcement rib 44 and other terms, but the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a heavy bearing box roof beam which characterized in that: the box girder comprises a plurality of box girder sections (1), and adjacent box girder sections (1) are connected through box girder section connecting plates (3); the box girder sections (1) which are symmetrically distributed are connected through a main beam (4); the box girder section (1) comprises a box girder section framework (17), a plurality of box girder hollow section rib plates (12) are distributed in the box girder section framework (17), and the box girder hollow section rib plates (12) are connected in the box girder section framework (17) through connecting reinforcing plates (14); the box girder full-section rib plates (13) are distributed at two ends of the box girder section framework (17), and the box girder full-section rib plates (13) are connected in the box girder section framework (17) through connecting reinforcing plates (14); the box girder longitudinal section rib plates (15) are arranged between the adjacent box girder hollow section rib plates (12), the box girder longitudinal section rib plates (15) are arranged between the box girder hollow section rib plates (12) and the box girder full section rib plates (13), and the box girder longitudinal section rib plates (15) are arranged between the adjacent box girder full section rib plates (13).

2. The heavy duty load carrying box beam of claim 1, wherein: the longitudinal section rib plate (15) of the box girder is L-shaped.

3. The heavy duty load carrying box beam of claim 2, wherein: the box girder section connecting plates (3) comprise at least two top connecting plates (32) and at least two bottom connecting plates (34), and the width directions of adjacent box girder section frames (17) are connected through the top connecting plates (32) and the bottom connecting plates (34) which are arranged inside and outside.

4. A heavy load carrying box girder according to claim 3, wherein: the box girder section connecting plates (3) comprise at least two inner side connecting plates (31) and at least two outer side connecting plates (33), and the length directions of adjacent box girder section frames (17) are connected through the inner side connecting plates (31) and the two outer side connecting plates (33) which are arranged inside and outside.

5. The heavy duty load carrying box beam of claim 4, wherein: and a pin shaft hole (16) used for being connected with the outside is distributed on the box girder section frame (17).

6. The heavy duty load carrying box beam of claim 5, wherein: the main beam (4) comprises a plurality of transverse reinforcing ribs (41), and a plurality of second reinforcing ribs (44) are distributed in the transverse reinforcing ribs (41).

7. The heavy duty load carrying box beam of claim 6, wherein: a transverse end connection reinforcing plate (43) used for increasing the connection strength is arranged between the box girder section (1) and the main beam (4), and a beam inner side limiting plate (42) used for limiting is arranged below the transverse end connection reinforcing plate (43).