CN223150048U - Single-amplitude double-machine lifting sling for closure section of cable-stayed bridge - Google Patents

Abstract

The utility model discloses a single-width dual-machine lifting sling for the joint section of a cable-stayed bridge, which is characterized in that the sling comprises: a shoulder-pole beam, a C-shaped distribution beam, a steel wire rope, a lower pulley, a pin shaft and a shackle; the shoulder-pole beam is a solid-belly composite box-type steel beam, on which an anchor head connected to a main lug plate reinforced by a lug plate reinforcement ring is provided; the anchor head connected to the main lug plate is arranged at both ends of the steel beam; the upper pulley is arranged under the beam at both ends of the distribution main beam by two distribution connection lug plates; a shackle connected by bolts is arranged under the distribution connection lug plate; two lower pulleys connected by a pin shaft are arranged on the bridge deck lifting lug; the steel wire rope is sleeved on the upper pulley and connected to the two lower pulleys through the shackle. Compared with the prior art, the utility model has the advantages of not needing to increase the counterweight to adjust the cantilever balance, and can realize the lifting of a single-width dual-machine or the lifting of a total of four bridge deck cranes in two widths, and can be operated synchronously or by a single machine, with high positioning efficiency, simple structure, easy operation, safety and reliability, and good application prospects.

Description

Single-amplitude double-machine lifting sling for closure section of cable-stayed bridge

Technical Field

The utility model relates to the technical field of bridge deck cranes, in particular to a single-amplitude double-crane lifting sling for a closure section of a cable-stayed bridge.

Background

At present, a main span steel box girder between two main towers of a cable-stayed bridge is installed by adopting a cantilever method, two bridge deck cranes are symmetrically installed from the main towers to the midspan, the two bridge deck cranes are usually adopted for lifting simultaneously during midspan closure, and in order to ensure the balance of a cantilever section and the elevation matching of the two bank steel box girders, water bags, concrete blocks or other counterweights are required to be arranged in the areas of the other two bridge deck cranes, so that the counterweight amount is large, the counterweight applying period is long and the operation is complicated.

Patent CN 216586201U discloses a hoist that is arranged in cable-stayed bridge construction to stride middle closure, including the compensating beam and establish the upper portion of compensating beam and be used for the connection lug that links to each other with bridge floor loop wheel machine steel cable, the upper portion of compensating beam is equipped with the lug on one side of connecting the lug, and the upper portion of compensating beam is equipped with the lug on the opposite side of connecting the lug, and the lug is equipped with the lower lug that is used for linking to each other with cable-stayed bridge closure section girder on the corresponding lug in below of compensating beam on each side, links to each other through wire rope between corresponding upper lug and the lower lug. Through the transition of compensating beam and upper and lower lug, can be through the closure mouth smoothly, guarantee the atress operating mode of hoist and mount in-process steel girder. However, the lifting appliance needs to be added with a counterweight to adjust the balance of the cantilever section during closure of the single-amplitude double-machine lifting closure section.

In order to solve the problems, the cable-stayed bridge closure section adopts a method of lifting two bridge deck cranes on the left and right sides of the two sides, at the moment, a group of lifting appliances are shared by the single bridge deck cranes on the two sides, the lifting loads on the two sides are the same, the balance load of the counter weight is not required to be applied, the heights Cheng Pipei of the steel box girders on the two sides are consistent, and the original lifting appliances are only required to be replaced. However, the lifting appliance in the prior art cannot meet the requirements of balance of a cantilever section and elevation matching of two-bank steel box girders, and a lifting appliance suitable for single-amplitude double-machine lifting of a closure section is designed for the lifting appliance, so that the construction and installation requirements of a group of lifting appliances shared by two bridge deck cranes of a cable-stayed bridge closure section are met, and the construction and installation requirements of a group of lifting appliances shared by two bridge deck cranes of a cable-stayed bridge closure section are met, so that the lifting of four bridge deck cranes can be synchronously operated and also can be operated by a single machine.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art, provides a single-frame double-machine lifting sling for a closure section of a cable-stayed bridge, which adopts a structural design that C-shaped distribution beams are longitudinally arranged and symmetrically arranged along the axis of a shoulder pole beam, the longitudinal arrangement space of the C-shaped distribution beams is consistent with the longitudinal space of bridge deck lifting lugs, and the longitudinal arrangement of the C-shaped distribution beams is symmetrically arranged along the axis of a distribution main beam, the transverse arrangement space of the C-shaped distribution beams is consistent with the transverse arrangement of the bridge deck lifting lugs, a steel wire rope bypasses an upper pulley, a lower pulley and a distribution connecting lug plate to be connected through shackles, and the single-frame double-machine lifting sling is simple in structure, convenient to use, synchronous in operation and high in positioning efficiency, well realizes the single-frame double-machine lifting, two total four bridge deck lifting sling, meets the balance of a cantilever section and the matching requirement of the elevation of a two-bank steel box girder, is simple to operate and high in work efficiency, shortens the construction period of a site circular seam, greatly improves the elevation matching precision of the closure section, and has good application prospect.

The single-amplitude double-machine lifting sling for the cable-stayed bridge is characterized by comprising a shoulder pole beam, a C-shaped distribution beam, a steel wire rope, a lower pulley, a pin shaft and a shackle, wherein the shoulder pole beam is of a solid-web combined box section and comprises a flange plate, a web plate, an anchor head connecting main lug plate, an ear plate reinforcing ring, an ear plate stiffening and shoulder pole beam stiffening all-welded structure, the flange plate is in full penetration welding with the web plate, the flange plate is connected with the anchor head connecting main lug plate, the anchor head connecting main lug plate is connected with a crane steel wire anchor head through a pin shaft, the two anchor head connecting main lug plates are provided with an ear plate stiffening and a shoulder pole beam stiffening, the ear plate stiffening and the shoulder pole beam stiffening are respectively welded with the flange plate and the web plate, the C-shaped distribution beam is composed of a distribution main beam, a distribution connecting lug plate and an upper pulley, the distribution main beam is of a solid-web combined box section of an all-welded structure, the distribution connecting lug plate is in penetration welding with the distribution main lug plate, the flange plate is connected with the web plate, the anchor head connecting main lug plate is connected with the anchor head connecting main lug plate through a pin shaft, the length of the cable is equal to the length of the lower pulley, and the length of the cable-shaped bridge is connected with the lower pulley, and the lower pulley is in a longitudinal mode, and the length of the distribution lug plate is connected with the bridge is in a horizontal mode.

Compared with the prior art, the utility model can realize single-amplitude double-machine lifting or lifting of two total four bridge deck cranes without adding a counterweight to adjust the cantilever balance, can synchronously operate and also can operate singly, has simple and convenient lifting appliance structure, high positioning efficiency, safety and reliability, better solves the problem of single-amplitude double-machine lifting of the closure section of the cable-stayed bridge, and has good application prospect.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

Fig. 3 is a sectional view of B-B of fig. 1.

Detailed Description

Referring to fig. 1, the combined type bridge comprises a shoulder pole beam 1, a C-shaped distribution beam 2, a steel wire rope 3, a lower pulley 4, a pin shaft 5 and a shackle 6, wherein the shoulder pole beam 1 is a solid-web combined box-shaped steel beam formed by welding a flange plate 11 and a web 12, anchor head connecting main lugs 13 reinforced by a lug plate reinforcing ring 14 are arranged on the shoulder pole beam 1, the anchor head connecting main lugs 13 are symmetrically arranged at two ends of the steel beam formed by the flange plate 11 and the web 12, lug plate stiffeners 15 and shoulder pole beam stiffeners 16 are arranged between the two anchor head connecting main lugs 13, the lug plate stiffeners 15 are welded with the flange plate 11 and the two anchor head connecting main lugs 13, the shoulder pole beam stiffeners 16 are welded with the web 12 and the two anchor head connecting main lugs 13, the C-shaped distribution beam 2 is composed of a distribution main beam 21, a distribution connecting lug plate 22 and an upper pulley 23, the distribution main beam 21 is symmetrically arranged on the shoulder pole beam 1 by an axis, the upper pulley 23 is fixedly connected with the shoulder pole beam 1 by bolts, the two distribution connecting lug plates 22 are arranged at two ends of the distribution main lugs 21 and the two lower pulley plates 11 and the two anchor head connecting main lugs 13 are welded with the two flange plates 11 and the two anchor head connecting main lugs 13, the two distribution main lugs 4 are connected with the two flange plate 12 and the two distribution main lugs 4 and the two distribution main lug plates 4 are welded with the two lower pulley plate 11, the lower flange plate 11 is connected with the two distribution main lug plate 11 and the lower pulley section 4 is connected with the lower flange 4, the lower flange plate 11 is connected with the lower flange 4 and the lower flange 4 through the length is connected with the lower flange 4 and the lower flange 4 through the lower flange 4.

Referring to fig. 2, the distributing main beam 21 is symmetrically arranged on the shoulder pole beam 1 by an axis and is fixedly connected with the shoulder pole beam 1 by bolts, the upper pulley 23 is formed by arranging two distributing connecting lugs 22 under beams at two ends of the distributing main beam 21, the distributing connecting lugs 22 are in penetration welding connection with the distributing main beam 21, the upper pulley 23 is connected with the distributing connecting lugs 22 by a shaft pin, a shackle 6 in bolt connection is arranged under the distributing connecting lugs 22, two lower pulleys 4 in pin shaft 5 connection are arranged on the bridge deck lifting lug 7, and the steel wire rope 3 is sleeved on the upper pulley 23 and is connected with the two lower pulleys 4 by the shackle 6.

Referring to fig. 3, the ear plate reinforcing rings 14 are disposed on two sides of the upper portion of the anchor head connecting main ear plate 13, and are welded with the anchor head connecting main ear plate 13, and the plate stiffening rings 15 are welded with the two anchor head connecting main ear plates 13 and the flange plate 11.

The utility model can realize single-amplitude double-machine lifting or lifting of two four bridge deck cranes without adding a counterweight to adjust the balance of the cantilever, and can synchronously operate or singly operate with high positioning efficiency. The utility model is further described with reference to the following claims, which are not intended to limit the scope of the utility model.

Claims (5)

1. A single-amplitude double-machine lifting sling for a cable-stayed bridge closure segment is characterized by comprising a shoulder pole beam (1), a C-shaped distribution beam (2), a steel wire rope (3), a lower pulley (4), a pin shaft (5), a shackle (6) and a bridge deck lifting lug (7), wherein the shoulder pole beam (1) is a solid-web combined box-shaped steel beam formed by welding a flange plate (11) and a web (12), an anchor head with an ear plate reinforcing ring (14) for reinforcing is arranged on the solid-web combined box-shaped steel beam, the anchor head is connected with a main ear plate (13), the anchor head is arranged at two ends of a steel beam formed by symmetrically arranging the flange plate (11) and the web (12), an ear plate stiffening (15) and a shoulder pole beam stiffening (16) are arranged between the two anchor head connecting main ear plates (13), the ear plate stiffening (15) and the flange plate (11) and the two anchor head connecting main ear plates (13) are welded, the shoulder pole stiffening beam (16) and the web (12) and the two anchor head connecting main ear plates (13) are welded, the distribution beam (21) is arranged on the main beam (21) and the main beam (21) is arranged on a distribution beam (1), and is fixedly connected with the shoulder pole beam (1) by bolts; the upper pulleys (23) are arranged below beams at two ends of the distribution main beam (21) through two distribution connecting lug plates (22), the distribution connecting lug plates (22) are connected with the distribution main beam (21) in a penetration welding mode, the upper pulleys (23) are connected with the distribution connecting lug plates (22) through shaft pins, a shackle (6) connected through bolts is arranged below the distribution connecting lug plates (22), two lower pulleys (4) connected through pin shafts (5) are arranged on bridge deck lifting lugs (7), and the steel wire ropes (3) are sleeved on the upper pulleys (23) and are connected with the two lower pulleys (4) through the shackle (6).

2. The cable-stayed bridge closure section single-amplitude double-machine lifting sling according to claim 1, characterized in that the length of the shoulder pole beam (1) is smaller than the closure section length.

3. The single-amplitude double-machine lifting sling for closure segments of cable-stayed bridges according to claim 1, wherein the flange plates (11), the web plates (12) and the anchor head connecting main lug plates (13) are welded in a full penetration way.

4. The cable-stayed bridge closure section single-amplitude double-machine lifting sling according to claim 1, wherein the longitudinal arrangement space of the C-shaped distribution beams (2) is consistent with the longitudinal space of the bridge deck lifting lugs (7).

5. The cable-stayed bridge closure section single-amplitude double-machine lifting sling according to claim 1, characterized in that the distribution main beam (21) is of a solid-web combined box section steel beam structure.