CN220450668U

CN220450668U - Temporary anchoring device for longitudinal movement lifting construction of truss type steel pipe arch

Info

Publication number: CN220450668U
Application number: CN202321488763.6U
Authority: CN
Inventors: 黄振威; 蒋德林; 王安文; 李晔; 薛辉; 于策; 黎六州
Original assignee: Road and Bridge International Co Ltd
Current assignee: Road and Bridge International Co Ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2024-02-06
Anticipated expiration: 2033-06-12

Abstract

The utility model relates to a temporary anchoring device for longitudinal movement lifting construction of a truss type steel pipe arch, which comprises a bottom plate, wherein a sling anchoring beam is welded on the bottom plate along the transverse direction, a row of vertical rods perpendicular to the bottom plate are respectively welded on the bottom plate along the longitudinal two sides of the bottom plate, at least two vertical rods are respectively arranged on the two sides of the sling anchoring beam, two arch rib anchoring plates are welded between every two vertical rods which are transversely opposite along the bottom plate, a tie rod anchoring plate is respectively welded between the two sides of the two vertical rods at one end of the bottom plate, and two tie rod through holes are respectively arranged on each tie rod anchoring plate and the arch rib anchoring plate between the two tie rod anchoring plates. The utility model can avoid the local stress concentration and unbalanced stress of the arch rib, ensure the stability of the arch rib structure and avoid the welding damage to the arch rib.

Description

Temporary anchoring device for longitudinal movement lifting construction of truss type steel pipe arch

Technical Field

The utility model belongs to the technical field of bridge construction, relates to arch rib installation construction of a steel tube arch bridge, and particularly relates to a temporary anchoring device for longitudinal movement and lifting construction of a truss type steel tube arch.

Background

In the construction process of the large-span steel pipe arch bridge, in order to improve the construction efficiency, an arch and bridge synchronous construction mode is often adopted, namely, when a bridge deck system is constructed, arch ribs are assembled in different positions synchronously, then the arch ribs are longitudinally moved to the bridge, and the bridge is installed in a lifting mode.

In the longitudinal movement and lifting process of the arch rib, temporary tie bars are required to be installed at two ends of the arch rib in order to ensure the line shape of the arch rib, and meanwhile, hanging points are required to be arranged at two ends of the arch rib in order to facilitate connection of the arch rib lifting slings. Fig. 1 is a schematic view showing a longitudinal moving lifting state of a conventional truss type steel pipe arch, wherein the truss type steel pipe arch comprises an upper chord member 101 and a lower chord member 102, web members 103 are welded between the upper chord member and the lower chord member, anchor seats 104 are welded at two ends of the lower chord member 102 of an arch rib, temporary tie bars 105 are used for mounting, lifting lugs 106 are welded at two ends of the upper chord member 101 of the arch rib, and connecting slings 107 are used for connecting slings 107. However, the above construction method has the following problems:

1. the parts of the arch rib, which are welded with the lug plates and the tie bar anchor seats, are subjected to too concentrated stress, so that the arch rib is easy to deform locally;

2. the gravity of the arch rib is only borne by the upper chord member, and the horizontal tension force of the temporary tie bar is only borne by the lower chord member, so that the stress of the arch rib web members connecting the upper chord member and the lower chord member is unbalanced, and the whole structure of the arch rib is adversely affected;

3. welding lifting lugs and anchor seats can cause welding damage to the arch ribs.

Disclosure of Invention

The utility model aims to solve the problems and provides a temporary anchoring device for longitudinal movement lifting construction of a truss type steel pipe arch, which ensures that the whole stress is stable in the longitudinal movement lifting construction process of an arch rib.

The technical scheme of the utility model is as follows:

a temporary anchoring device for truss-like steel pipe arch is indulged and is moved promotion construction, its characterized in that: the steel pipe arch comprises a rectangular bottom plate, wherein the transverse width of the bottom plate is larger than the transverse width of a truss type steel pipe arch, a sling anchoring beam is transversely welded on the bottom plate, sling through holes are respectively formed in two ends of the sling anchoring beam, a row of vertical rods perpendicular to the bottom plate are respectively welded on two sides of the bottom plate in the longitudinal direction of the bottom plate, at least two vertical rods in each row are respectively arranged on two sides of the sling anchoring beam, two arch rib anchoring plates are welded between every two vertical rods transversely opposite to each other along the bottom plate, each arch rib comprises an upper clamping plate and a lower clamping plate, two arc-shaped bayonets with downward openings are formed in the upper clamping plate, two arc-shaped bayonets with upward openings are formed in the lower clamping plate, two ends of the upper clamping plate and the lower clamping plate are respectively welded with the two vertical rods, and the arc-shaped bayonets on the upper clamping plate and the lower clamping plate are opposite to form arch rib chord rod through holes with the diameters consistent with the diameters of arch rib chord rods; two tie rod anchor plates are welded between two sides of two vertical rods at one end of the bottom plate respectively, two tie rod through holes are respectively formed in each tie rod anchor plate and in each arch rib anchor plate between the two tie rod anchor plates, and the tie rod through holes in the two tie rod anchor plates and the arch rib anchor plates are longitudinally penetrated along the bottom plate.

According to the utility model, the arch rib hanging points and the tie bar anchoring points are arranged on one anchoring device, the anchoring device is simultaneously fixed with the upper chord member and the lower chord member of the arch rib, and the gravity of the arch rib and the horizontal stretching force of the tie bar are borne by the anchoring device when the arch rib is lifted, so that the local stress concentration and unbalanced stress of the arch rib can be avoided, and the stability of the arch rib structure is ensured; the anchoring device is not welded with the arch rib chord member, so that welding damage to the arch rib parent metal can be avoided.

Drawings

FIG. 1 is a schematic illustration of a prior art truss type steel pipe arch longitudinally moving lifting mode;

FIG. 2 is a schematic perspective view of the present utility model;

FIG. 3 is a schematic plan view of the present utility model;

FIG. 4 is a schematic side elevational view of the present utility model;

FIG. 5 is a schematic plan view of the end on which the tie-bar anchor plates are disposed;

FIG. 6 is a schematic view of a split construction of an arch rib upper chord anchorage plate or lower chord anchorage plate;

FIG. 7 is a perspective view of the present utility model in an installed state on a rib;

fig. 8 is a side view of the present utility model in an installed state on a rib.

Fig. 9 is a side view of the present utility model in use for longitudinal movement and lifting of ribs.

Detailed Description

As shown in fig. 2 to 6, the utility model comprises a rectangular bottom plate 1, the transverse width of the bottom plate is larger than the transverse width of a truss-type steel pipe arch, a sling anchoring beam 2 is welded on the bottom plate 1 along the transverse direction, sling through holes 21 are respectively formed at two ends of the sling anchoring beam 2, a row of vertical rods 3 vertical to the bottom plate are respectively welded on two longitudinal sides of the bottom plate on the bottom plate, the distance between the two rows of vertical rods is larger than the transverse width of an arch rib, at least two vertical rods are respectively arranged on two sides of the sling anchoring beam 2, two arch rib anchoring plates 4 are welded between every two vertical rods 3 transversely opposite to each other along the bottom plate, the two arch rib anchoring plates 4 are arranged up and down and are respectively used for anchoring an upper chord rod and a lower chord rod of an arch rib, each arch rib anchoring plate comprises an upper clamping plate 41 and a lower clamping plate 42, two arc-shaped bayonets 43 with downward openings are respectively formed on the upper clamping plate and the lower clamping plate, two ends of the upper clamping plate and the lower clamping plate are respectively welded with the arc bayonets on the two vertical rods 3, and the arc bayonets on the upper clamping plates and the lower clamping plates are opposite to each other, and the diameters of the arch rib ribs 43 are consistent with the diameters of the upper chord rods and the lower chord rods; two tie rod anchor plates 5 are welded between two sides of two vertical rods at one end of the bottom plate, two tie rod through holes 51 are respectively arranged on each tie rod anchor plate 5 and on the arch rib anchor plate 4 between the two tie rod anchor plates, and the tie rod through holes on the two tie rod anchor plates and the arch rib anchor plates are longitudinally penetrated along the bottom plate.

In the concrete implementation of the utility model, in order to facilitate installation and save materials, the height of each row of vertical rods 3 is reduced in turn according to the longitudinal inclination angle change of the arch rib, and two tie rod anchoring plates 5 are welded on two sides of the two highest vertical rods 3 respectively.

In the concrete implementation of the utility model, in order to strengthen the overall structural strength of the anchoring device, a plurality of connecting rods 6 are welded between the adjacent vertical rods 3 at each side of the sling anchoring beam.

In the concrete implementation of the utility model, in order to facilitate the installation of slings, cushion blocks 7 are welded between the bottom plates at the bottoms of the two ends of the sling anchoring beam 2 respectively, so that a certain gap is reserved between the part of the sling anchoring beam provided with sling through holes and the bottom plates, and when slings are installed, the lower ends of slings penetrate through the sling through holes, and anchor nuts are screwed at the bottoms of the sling anchoring beams.

The application mode of the utility model is as follows:

as shown in fig. 7, 8 and 9, after the rib assembly is completed, a lifting position is designed at two ends of the rib, an anchoring device of the utility model is respectively installed, each rib anchoring plate 4 is not installed first, a bottom plate 1 is firstly placed below the rib, two rows of vertical rods 3 are respectively positioned at two sides of the rib, then a lower clamping plate 42 is installed at the bottoms of an upper chord member 101 and a lower chord member 102 of the rib, the rib chord members are clamped in arc bayonets on the lower clamping plate, two ends of each lower clamping plate are respectively welded with the two vertical rods, then each upper clamping plate 41 is clamped at the tops of the upper chord member 101 and the lower chord member 102 of the rib, the arc bayonets on the upper clamping plate clamp the rib chord members, and two ends of the upper clamping plates are respectively welded with the two vertical rods.

A temporary tie rod 105 is installed between the tie rod anchor plates 7 of the two anchor devices, two ends of the temporary tie rod respectively penetrate through the tie rod through holes on the tie rod anchor plates 5 of the two anchor devices, an anchor nut is installed at one end of the temporary tie rod, and the temporary tie rod is tensioned at the other end and then anchored. The horizontal tension of the temporary tie is transmitted to the two upper chords and the two lower chords of the arch rib through the upper clamping plates 41 at the same time, and the upper chords and the lower chords are stressed together.

After the arch rib is longitudinally moved into place, slings 107 are mounted at the two ends of the sling anchoring beams 2 of the two anchoring devices, and the arch rib is lifted by the slings. The weight of the rib is shared by the lower plates 42.

After the arch rib is installed, the upper clamping plate 41 and the lower clamping plate 42 are cut off, and the anchoring device can be separated from the arch rib.

Claims

1. A temporary anchoring device for truss-like steel pipe arch is indulged and is moved promotion construction, its characterized in that: the steel pipe arch comprises a rectangular bottom plate, wherein the transverse width of the bottom plate is larger than the transverse width of a truss type steel pipe arch, a sling anchoring beam is transversely welded on the bottom plate, sling through holes are respectively formed in two ends of the sling anchoring beam, a row of vertical rods perpendicular to the bottom plate are respectively welded on two sides of the bottom plate in the longitudinal direction of the bottom plate, at least two vertical rods in each row are respectively arranged on two sides of the sling anchoring beam, two arch rib anchoring plates are welded between every two vertical rods transversely opposite to each other along the bottom plate, each arch rib comprises an upper clamping plate and a lower clamping plate, two arc-shaped bayonets with downward openings are formed in the upper clamping plate, two arc-shaped bayonets with upward openings are formed in the lower clamping plate, two ends of the upper clamping plate and the lower clamping plate are respectively welded with the two vertical rods, and the arc-shaped bayonets on the upper clamping plate and the lower clamping plate are opposite to form arch rib chord rod through holes with the diameters consistent with the diameters of arch rib chord rods; two tie rod anchor plates are welded between two sides of two vertical rods at one end of the bottom plate respectively, two tie rod through holes are respectively formed in each tie rod anchor plate and in each arch rib anchor plate between the two tie rod anchor plates, and the tie rod through holes in the two tie rod anchor plates and the arch rib anchor plates are longitudinally penetrated along the bottom plate.

2. The temporary anchoring device for girder-type steel pipe arch longitudinal displacement lifting construction according to claim 1, wherein: the height of each row of vertical rods is reduced in sequence according to the longitudinal inclination angle change of the arch rib, and two tie rod anchoring plates are welded on two sides of the two highest vertical rods respectively.

3. The temporary anchoring device for girder-type steel pipe arch longitudinal displacement lifting construction according to claim 1, wherein: a plurality of connecting rods are welded between the adjacent vertical rods on each side of the sling anchoring beam.

4. The temporary anchoring device for girder-type steel pipe arch longitudinal displacement lifting construction according to claim 1, wherein: cushion blocks are welded between the bottom plates at the bottoms of the two ends of the sling anchoring beam respectively, and a certain gap is reserved between the part of the sling anchoring beam, which is provided with the sling through hole, and the bottom plates.