CN205296844U - Precast box girder steel strand wires hoisting point - Google Patents

Abstract

The utility model discloses a prefabricated box girder steel strand lifting point, which is characterized in that: steel strands are pre-embedded in the prefabricated box girder, each suspension ring is formed by the steel strands on the set position of the box girder roof, and each The hoisting ring is used to hoist the prefabricated box girder, and multiple steel strands are arranged in parallel to form a steel strand bundle, and the steel strand bundle is bent in the middle to form a hoisting ring. The utility model has reasonable structure and uniform force, so that the box girder can be hoisted stably, avoiding the eccentricity of the box girder and causing inclination, and the operation is safe and reliable.

Description

Prefabricated box girder steel strand hanging point

technical field

The utility model relates to a steel strand hanging point, in particular to a steel strand hanging point used in box girders for box girder hoisting operations.

Background technique

In the prior art, the traditional hoisting method is still used for the box girder hoisting operation, which has the following disadvantages:

1. When lifting the box girder, the steel wire rope is not only subjected to tensile force but also shear force, which increases the damage to the steel wire rope, reduces the service life of the steel wire rope, and increases the use cost of the steel wire rope;

2. During the hoisting process of the box girder, the steel wire rope will squeeze the junction of the bottom plate and the web of the box girder, as well as the two ends of the flange plate, which may cause the concrete at the corresponding part to break or crack under the action of extrusion stress other damages;

3. The length of the wire rope is too long, so it is not easy to carry out the inspection work before the hoisting operation;

4. When using hoisting, the wire rope is not easy to install, which increases the labor cost;

5. During the hoisting operation of the box girder, due to factors such as the offset of the center of gravity of the box girder, the box girder will be inclined due to eccentricity, which increases the unsafe factors in the hoisting operation of the box girder.

Utility model content

The utility model is to avoid the shortcomings of the above-mentioned prior art, and provides a prefabricated box girder steel strand hanging point to ensure the stability of the box girder in the hoisting and removing process, so that the box girder can be hoisted smoothly, and avoid the box girder due to Tilting due to eccentricity reduces unsafe factors in the construction of the anti-collision wall, reduces the construction cost of hoisting operations, and improves work efficiency.

The utility model adopts following technical scheme for solving technical problems:

The structural feature of the prefabricated box girder steel strand lifting point of the utility model is that the steel strand is pre-embedded in the prefabricated box girder, and each suspension ring is formed by the steel strand on the set position of the box girder roof, and each Lifting rings lift the prefabricated box girder.

The structural features of the prefabricated box girder steel strand hanging point of the utility model also lie in:

Multiple steel strands are used as a group to form a steel strand bundle, and the steel strand bundle is bent in the middle to form the suspension ring.

Positioning plates are arranged at both ends of the steel strand bundle, and each steel strand in the steel strand bundle passes through corresponding positioning holes on the positioning plate at both ends to obtain positioning.

The steel strand bundle is bound together with the box girder reinforcement frame, and is prefabricated together with the box girder.

There are four suspension rings, which are located at the four corners of the box girder roof.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The structure of the utility model is reasonable, and the force is uniform, so that the box girder can be hoisted smoothly, and the eccentricity of the box girder is avoided and the inclination occurs;

2. The utility model effectively avoids the damage of the steel wire rope to the concrete of the box girder flange plate during the hoisting process of the box girder, and plays a good role in protecting the box girder;

3. The utility model adopts the form of hanging point, and the steel wire rope does not need to surround the box girder, which avoids damage to the steel wire rope and prolongs the service life of the steel wire rope; at the same time, it also shortens the use length of the steel wire rope, thus reducing the use cost of the steel wire rope. Installation, reduce labor costs;

Description of drawings

Fig. 1 is the plane layout diagram of the hanging point of the box girder steel strand in the utility model;

Fig. 2 is the schematic diagram of the section structure of the box girder at the location of the lifting point in the utility model;

Fig. 3 is a schematic diagram of a steel strand hanger in the utility model;

Fig. 4 is the utility model steel strand suspender and box girder steel bar fixed binding schematic diagram;

Labels in the figure: 1 prefabricated box girder, 2 steel strand, 3 suspension ring, 4 positioning plate, 5 box girder reinforced skeleton.

detailed description

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the structural form of the steel strand hanging point of the prefabricated box girder in this embodiment is: the steel strand 2 is pre-embedded in the prefabricated box girder 1, and the steel strand 2 is placed in the box Each suspension ring 3 is formed on the set position of the beam top plate, and the prefabricated box girder 1 is hoisted by each suspension ring 3 .

In the specific implementation, as shown in Figure 3, a plurality of steel strands 2 are used as a group to form a steel strand bundle, and the steel strand bundle is bent in the middle to form a suspension ring 3; positioning plates 4 are respectively arranged at both ends of the steel strand bundle , each steel strand in the steel strand bundle passes through the corresponding positioning holes on the positioning plate 4 at both ends to obtain positioning, as shown in Figure 4, the steel strand bundle is bound together with the box girder reinforcement skeleton 5, and is prefabricated together with the box girder forming.

As shown in Fig. 1, there are four suspension rings 3 in this embodiment, which are located at the four corners of the box girder top plate, and the force is uniform.

The selection of steel strands should be considered: the tensile strength of each steel strand should reach 1860MP, and its comprehensive breaking force should meet the requirements of the national standard GB1200-88; the test results of its maximum load, elongation, yield load and relaxation rate should be It meets the requirements of the national standard GB/T5224-1995; the tensile test is carried out according to the national standard GB228-87, the torsion test is carried out according to the national standard GB239-84, and the relaxation test is carried out according to the national standard GB10120-88.

In the utility model, the steel strand lifting point has high tensile strength, reasonable structure, and is easy to install. The steel strand suspension ring and the box girder are prefabricated as a whole, the plane position is arranged reasonably, and the force is uniform, which can ensure the box girder during hoisting operation. It can move smoothly, avoiding eccentricity and causing the box girder to tilt during hoisting.

The utility model reduces the use length of the steel wire rope, is easier to install, reduces labor cost, and facilitates inspection of the steel wire rope before the hoisting operation of the box girder.

Claims (5)

1. prefabricated case beam steel strand hang a little, it is characterized in that: in prefabricated case beam (1), bury steel strand (2) in advance, on the desired location of case back plate, form each suspension ring (3) by described steel strand (2), utilize described each suspension ring (3) to be lifted by described prefabricated case beam (1).

2. prefabricated case beam steel strand according to claim 1 hang a little, it is characterized in that: become steel wire bundle taking many steel strand (2) side by side as one group, and described steel wire bundle forms described suspension ring (3) in middle part bending.

3. prefabricated case beam steel strand according to claim 2 hang a little, it is characterized in that: be respectively arranged with strongback (4) at the two ends of described steel wire bundle, in described steel wire bundle, each steel strand run through described strongback (4) upper corresponding pilot hole acquisition location respectively at two ends.

4. prefabricated case beam steel strand according to claim 2 hang a little, it is characterized in that: described steel wire bundle and the common colligation of steel bar framework of box beam (5), and with case beam with pre-formed altogether.

5. prefabricated case beam steel strand according to claim 1 hang a little, it is characterized in that: described suspension ring (3) have everywhere, divide and are on the position at four angles of case back plate.