CN214573368U

CN214573368U - Shearing-resistant Bailey

Info

Publication number: CN214573368U
Application number: CN202120053888.0U
Authority: CN
Inventors: 金翀
Original assignee: Zhejiang Communications Construction Group Co Ltd
Current assignee: Zhejiang Communications Construction Group Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-11-02
Anticipated expiration: 2031-01-08

Abstract

The utility model provides a type of shearing bailey, chord member including the symmetry is laid, the chord member that the symmetry was laid is connected through a plurality of perpendicular web members, has laid oblique web member between chord member and the perpendicular web member, erects the web member including laying and establishing perpendicular web member in the peripheral hardware of chord member both ends is erected web member chord member central authorities, the peripheral hardware is erected the web member and is included third channel-section steel and fourth channel-section steel, and third channel-section steel and fourth channel-section steel are laid relatively, and third channel-section steel and fourth channel-section steel are connected through a plurality of rectangle steel sheets, have laid the fourth round pin shaft hole on the rectangle steel sheet, the utility model discloses on its original structural basis, optimized the bearing capacity of unit member structure and material in order to strengthen perpendicular web member, and then optimized the stress distribution of bailey continuous beam, effectively improved the comprehensive bearing capacity of bailey.

Description

Shearing-resistant Bailey

Technical Field

The utility model belongs to bridge construction field especially relates to a type of shearing bailey.

Background

The Bailey sheet used by the current domestic universal '321' Bailey steel bridge is developed and improved by combining the national conditions of China on the basis of the original English Bailey truss bridge, and is shaped, produced and put into use from 1965. The Bailey sheet is formed by processing double-spliced 10# channel steel and 8# I-steel. Although some '321' Bailey sheets are optimized in design in recent years, the basic structural forms of the chords adopting the double-spliced 10# channel steel and the web members adopting the 8# I-shaped steel are not changed.

The technical performance, the member names and the application of the 321 Bailey steel bridge, the design calculation data of the bridge, the splicing and erecting technology and the program are all described in detail in the assembly type highway steel bridge operating manual published in 1998 by the traffic war preparedness office of the department of transportation. The theoretical allowable bearing capacity of 321 Bailey sheets main unit rod pieces, Standard forms, spans and integral bearing capacity of Bailey temporary steel bridges are listed in an assembly type highway steel bridge operating manual. According to parameters and a using method in an assembly type highway steel bridge operating manual, an original 321 Bailey sheet is designed for a large-span light-load simply supported beam structure based on an allowable stress method, and the Bailey sheet is assumed to be a truss structure in calculation, and unit rods are pure tension and compression rods.

However, the design concept of the original '321' Bailey sheet is not consistent with the actual use condition at present: firstly, the current structural design specification generally adopts a limit state method; secondly, the bailey sheets are actually lattice frames rather than trusses, so that bending moment can be transmitted among the rod pieces of the single bailey sheet, and the bailey sheet is not a pure tension-compression rod; furthermore, in large temporary load-bearing facilities used in current civil engineering and road and bridge construction, the beret beam is generally a small-span heavy-load continuous beam structure.

When the original 321 Bailey sheet is used for building a continuous beam bearing member and the structure checking calculation is carried out according to the modern design concept, the theoretical bearing capacity of the continuous beam bearing member is far less than the nominal data in an assembly type highway steel bridge operating manual. Especially, the bearing capacity of the 8# I-steel web member near the fulcrum is poor, and is seriously not matched with the integral bearing capacity of the Bailey beam, and the local reinforcement of the rod member is often needed. However, since the Bailey pieces are not suitable for being welded with the additional rod pieces, the effect of adding the reinforcing rods is very limited.

In order to overcome the practical problems that the original 321 Bailey sheet is not suitable for a small-span heavy-load continuous beam structure, the bearing capacity of a unit rod piece is insufficient, the effect of additionally arranging a reinforcing rod is limited and the like, the shear-resistant Bailey is designed.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome the defect among the above-mentioned prior art, provide an optimize unit member material and structure and erect web member bearing capacity in order to strengthen, and then optimize the shearing type bailey of bailey continuous beam stress distribution.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a type of shearing bailey, includes the chord member that the symmetry was laid, the chord member that the symmetry was laid is connected through a plurality of perpendicular web members, has laid oblique web member between chord member and the perpendicular web member, erects the web member including laying and establishing perpendicular web member in the peripheral hardware of chord member both ends is erected web member chord member central authorities, the peripheral hardware is erected the web member and is included third channel-section steel and fourth channel-section steel, and third channel-section steel and fourth channel-section steel are laid relatively, and third channel-section steel and fourth channel-section steel are connected through a plurality of rectangle steel sheets, have laid the fourth round pin shaft hole on the rectangle steel sheet.

As a preferred scheme of the utility model, the peripheral hardware erects the web member, establishes to erect the equidistant laying of web member in.

As a preferred scheme of the utility model, first round pin shaft hole has been laid to the one end of chord member, and second round pin shaft hole has been laid to the other end of chord member.

As the utility model discloses an optimal scheme, the chord member includes first channel-section steel and second channel-section steel, and first channel-section steel and second channel-section steel are laid relatively, and first channel-section steel and second channel-section steel are connected through a plurality of steel sheets, have laid the third round pin shaft hole on the steel sheet.

As an optimized scheme of the utility model, the web member perpendicular to chord member is erected to the peripheral hardware.

As an optimized proposal of the utility model, the interior is provided with the vertical web members perpendicular to the chord members.

As an optimized proposal of the utility model, the side surface of the diagonal web member is of an I-shaped structure.

As an optimized proposal of the utility model, the end part of the oblique web member is provided with an internally tangent notch.

As an optimized proposal of the utility model, the length of the chord is 1.5 to 3 times of the length of the vertical web member.

As an optimized proposal of the utility model, the length of the vertical web member is 1.2 to 2 times of that of the diagonal web member.

The utility model has the advantages that:

1. the utility model provides a shearing type bailey is on its original structural basis, optimizes the bearing capacity of unit member material in order to strengthen perpendicular web member, and then optimizes the stress distribution of bailey continuous beam.

2. The utility model provides a pair of shearing type bailey uses the channel-section steel of suitable model to make up into perpendicular web member, optimizes the cross sectional area and the shape of member, effectively improves and erects the web member and synthesize bearing capacity.

3. The utility model provides a pair of type of shearing bailey is striding the theoretical bearing capacity among the continuous beam bearing structure of footpath no longer than 15m and has obvious improvement than former "321" bailey, and the bearing capacity increase range is greater than the weight increase range, and strides the footpath and the bearing capacity increase range is big more less.

Drawings

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

FIG. 2 is a schematic view of the structure of the A-A surface of the present invention;

FIG. 3 is a schematic view of the structure of the plane B-B of the present invention;

reference numbers in the figures: chord member 1, oblique web member 2, erect web member 3, third round pin shaft hole 5, fourth round pin shaft hole 6, steel sheet 7, rectangle steel sheet 8, the perpendicular web member of peripheral hardware 31 establishes perpendicular web member 32 in, first channel-section steel 101, second channel-section steel 102, breach 201, third channel-section steel 301, fourth channel-section steel 302, first round pin shaft hole 401, second round pin shaft hole 402.

Detailed Description

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

As shown in fig. 1-3, a shear-resistant bailey comprises chords 1 which are symmetrically arranged, the chords 1 which are symmetrically arranged are connected through a plurality of vertical web members 3, diagonal web members 2 are arranged between the chords 1 and the vertical web members 3, the vertical web members 3 comprise peripheral vertical web members 31 arranged at two ends of the chords 1 and vertical web members 32 arranged in the centers of the chords 1, the peripheral vertical web members 31 comprise third channel steel 301 and fourth channel steel 302, the third channel steel 301 and the fourth channel steel 302 are arranged relatively, the distance between the third channel steel 301 and the fourth channel steel 302 is preferably 8cm, the third channel steel 301 and the fourth channel steel 302 are connected through a plurality of rectangular steel plates 8, fourth pin shaft holes 6 are arranged on the rectangular steel plates 8, the fourth pin shaft holes 6 can be connected with bailey windows, and two adjacent bailey windows are connected into a whole.

Further, the external vertical web members 31 and the internal vertical web members 32 are arranged at equal intervals, so that stress distribution on the shear-resistant bailey is balanced, the sectional area and the shape of the vertical web members 3 are optimized by the external vertical web members 31 through a channel steel structure formed by the third channel steel 301 and the fourth channel steel 302, and the comprehensive bearing capacity of the vertical web members 3 is effectively improved, of course, the external vertical web members 31 can be single square steel pipes or single rectangular steel pipes, and the internal vertical web members 32 can be single square steel pipes or single rectangular steel pipes; the peripheral vertical web members 31 are perpendicular to the chord members 1, and the internal vertical web members 32 are perpendicular to the chord members 1, so that the earlier positioning and the subsequent installation between the chord members 1 and the vertical web members 3 are facilitated.

Further, a first pin shaft hole 401 is distributed at one end of the chord member 1, the first pin shaft hole 401 corresponds to a male head on the shearing-resistant 321 Bailey, a second pin shaft hole 402 is distributed at the other end of the chord member 1, the second pin shaft hole 402 corresponds to a female head on the shearing-resistant Bailey, and the male head and the female head of other Bailey accessible shearing-resistant Bailey are connected with the shearing-resistant Bailey and spliced into a beam structure with any length. Chord member 1, oblique web member 2 and erect web member 3 and lay relatively and form a plurality of triangle-shaped structure, have guaranteed the stability of structure, and on the other hand has strengthened the bearing capacity of structure.

Further, the chord member 1 comprises a first channel steel 101 and a second channel steel 102, the first channel steel 101 and the second channel steel 102 are arranged relatively and are a pair of channel steels which are opposite to each other, the first channel steel 101 and the second channel steel 102 are connected through a plurality of steel plates 7, a third pin shaft hole 5 is arranged on each steel plate 7, the shear-resistant bailey is connected with the reinforcing chord member or the double-layer bailey through the third pin shaft hole 5, and the third pin shaft hole 5 facilitates connection between the structure and the structure.

Further, 2 sides of diagonal web members are in an I-shaped structure, and 2 ends of the diagonal web members are provided with notches 201 internally tangent to each other, so that the diagonal web members 2 and the diagonal web members 2 can be conveniently positioned and butted with each other. The length of the chord member 1 is 1.5-3 times of the length of the vertical web member 3, the length of the vertical web member 3 is 1.2-2 times of the length of the diagonal web member 2, and the design of the proportion meets the actual requirement.

The shear resistant Bailey is implemented as follows: a chord 1, an oblique web member 2 and a vertical web member 3 of a shear-resistant bailey are constructed in a one-to-one correspondence mode, a first pin shaft hole 401 is distributed at one end of the chord 1, the first pin shaft hole 401 corresponds to a male head on the shear-resistant bailey, a second pin shaft hole 402 is distributed at the other end of the chord 1, the second pin shaft hole 402 corresponds to a female head on the shear-resistant bailey, when the shear-resistant bailey is spliced with other bailey, the male head of the chord 1 of one bailey is inserted into the female head of the chord 1 of the other bailey, the first pin shaft holes 401 or the second pin shaft holes 402 of the two bailey are inserted into a bailey pin after being aligned, the bailey pin is a bailey pin matched with the original '321' bailey, and one shear-resistant bailey can be connected with the other shear-resistant bailey or can be connected with the original '321' bailey.

Further, the chord member 1 adopts the first channel-section steel 101 and the second channel-section steel 102 that mutually reverse mutually, also can adopt single square steel pipe or rectangle steel pipe, connects through a plurality of steel sheets 7 each other, and it has third round pin shaft hole 5 to open on the steel sheet 7, through third round pin shaft hole 5, can connect the strengthening chord member, or sets up double-deck bailey, and the strengthening chord member is the supporting strengthening chord member of former "321" bailey.

Further, the peripheral vertical web member 31 is formed by a third channel steel 301 and a fourth channel steel 302 which are opposite to each other and connected with each other through a plurality of rectangular steel plates 8, and a fourth pin shaft hole 6 is formed in each steel plate. And the bailey windows can be connected through the fourth pin shaft holes 6, two adjacent baires are connected into a whole, and the bailey windows are the bailey windows matched with the original 321 baires.

Although the reference numerals in the figures are used more here: the steel plate comprises a chord member 1, an oblique web member 2, a vertical web member 3, a third pin shaft hole 5, a fourth pin shaft hole 6, a steel plate 7, a rectangular steel plate 8, an external vertical web member 31, an internal vertical web member 32, a first channel steel 101, a second channel steel 102, a notch 201, a third channel steel 301, a fourth channel steel 302, a first pin shaft hole 401, a second pin shaft hole 402 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. A shear-resistant bailey, comprising: chord member (1) including the symmetry is laid, chord member (1) that the symmetry was laid are connected through a plurality of perpendicular web members (3), and chord member (1) and erect between web member (3) and lay diagonal web member (2), erect web member (3) including laying establish in establishing perpendicular web member (31) of the peripheral hardware at chord member (1) both ends and chord member (1) central authorities perpendicular web member (32), the peripheral hardware is erect web member (31) and is included third channel-section steel (301) and fourth channel-section steel (302), and third channel-section steel (301) and fourth channel-section steel (302) are laid relatively, and third channel-section steel (301) and fourth channel-section steel (302) are connected through a plurality of rectangle steel sheet (8), have laid fourth round pin shaft hole (6) on rectangle steel sheet (8).

2. A shear resistant bailey according to claim 1 wherein: the external vertical web members (31) and the internal vertical web members (32) are arranged at equal intervals.

3. A shear resistant bailey according to claim 2 wherein: a first pin shaft hole (401) is formed in one end of the chord (1), and a second pin shaft hole (402) is formed in the other end of the chord (1).

4. A shear resistant bailey according to claim 3 wherein: the chord member (1) comprises a first channel steel (101) and a second channel steel (102), the first channel steel (101) and the second channel steel (102) are arranged relatively, the first channel steel (101) and the second channel steel (102) are connected through a plurality of steel plates (7), and a third pin shaft hole (5) is arranged on each steel plate (7).

5. A shear resistant bailey according to claim 4 wherein: the peripheral vertical web members (31) are perpendicular to the chord members (1).

6. A shear resistant bailey according to claim 5 wherein: the internal vertical web members (32) are vertical to the chord members (1).

7. A shear resistant bailey according to claim 6 wherein: the side surface of the inclined web member (2) is of an I-shaped structure.

8. A shear resistant bailey according to claim 7 wherein: the end part of the inclined web member (2) is provided with an internally-tangent notch (201).

9. A shear resistant bailey according to claim 8 wherein: the length of the chord member (1) is 1.5-3 times of the length of the vertical web member (3).

10. A shear resistant bailey according to claim 9 wherein: the length of the vertical web members (3) is 1.2-2 times of that of the diagonal web members (2).