Steel truss girder hoisting structure with limited hoisting height

Abstract

The utility model discloses a steel truss girder hoisting structure with limited hoisting height, and belongs to the technical field of building construction. Bracket brackets are arranged at the two ends of a steel truss respectively, each bracket bracket comprises two bracket lower chords, two inclined rods, a front cross beam and a rear cross beam, the front cross beam and the rear cross beam are fixedly connected between the two bracket lower chords, and the bracket lower chords are arranged in the longitudinal direction of a steel beam. One ends of the two bracket lower chords are fixedly connected with the ends of the two lower chords of the steel truss girder respectively, the inclined rods are fixedly connected between the two vertical rods at the ends of the steel truss girder and the other ends of the two bracket lower chords respectively, and the two lifting lugs are correspondingly fixed to a front cross beam and a rear cross beam of the bracket bracket respectively. The style of a rod piece of the corbel bracket is consistent with that of a rod piece of a steel truss girder body. The lifting device can reduce the lifting height, expands the range of lifting operation, and is suitable for construction occasions with limited lifting height.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steel truss hoisting structure, especially a steel truss hoisting structure used when hoisting height is limited, and belongs to the technical field of building construction. BACKGROUND

[0002] Steel truss is a common steel structure form and is widely used in the building industry. Steel truss is usually processed at a construction site or a steel structure processing site and then hoisted to a design position by a large-tonnage crane after being transported to the site.

[0003] When hoisting a steel truss, lug ears are usually arranged at the upper chord joint of the steel truss to facilitate hoisting operation by a crane. However, the construction environment of the steel truss is often complex, and sometimes there are structures or high-voltage lines at the top of the design position of the steel truss, which affect the hoisting operation. The traditional lug ear cannot meet the space requirement of hoisting operation. When such a situation occurs in construction, a pushing and pulling construction process is usually used. This process has many temporary measures and a long construction period, and requires the erection of a steel operation platform, a steel guide beam, and pushing and pulling equipment, which is troublesome. SUMMARY

[0004] In view of the above defects in the prior art, the utility model provides a steel truss hoisting structure suitable for use when hoisting height is limited.

[0005] The utility model is realized through the following technical scheme: a steel truss hoisting structure used when hoisting height is limited, characterized by: a corbel bracket is arranged at each end of the steel truss, the corbel bracket comprises two bracket lower chords, two inclined rods, a front cross beam and a rear cross beam fixedly connected between the two bracket lower chords, the bracket lower chords are arranged along the longitudinal direction of the steel beam, one end of each of the two bracket lower chords is fixedly connected to the end of the lower chord of the steel truss, one of the inclined rods is fixedly connected between the two vertical rods at the end of the steel truss and the other end of the two bracket lower chords, two lug ears are fixedly arranged on the front cross beam and the rear cross beam of the corbel bracket, respectively, and the rod style of the corbel bracket is consistent with the rod style of the main body of the steel truss.

[0006] In the utility model, the corbel bracket is arranged at each end of the steel truss, and the lug ear is arranged on the corbel bracket, so that the hoisting space of one "steel truss height" is reduced, and the range of hoisting operation is expanded. When in use, the steel truss can be hoisted to the design position by using the double-machine lifting mode at the two ends of the steel truss, and after hoisting in place, the corbel bracket can be cut off.

[0007] Further, in order to increase the stability of the corbel bracket, two reinforcing beams are fixedly connected between the front cross beam and the rear cross beam of the corbel bracket.

[0008] Further, the lug and the front crossbeam / rear crossbeam of the bracket are provided with stiffening ribs.

[0009] Further, the length of the bracket is less than the distance between the two vertical uprights of the steel truss.

[0010] Further, the steel truss and the bracket are both made of H-shaped steel, and the wings of the H-shaped steel of the bracket are welded with a plurality of horizontal stiffening ribs and a plurality of vertical stiffening ribs.

[0011] The utility model discloses the beneficial effect is: the utility model discloses simple structure, through setting up bracket at the both ends of steel truss, and setting up lug on bracket, can reduce the hoisting space of " steel truss height", expands the range of hoisting operation, and the hoisting structure is very suitable for the mode of double -engine lifting and hoists steel truss and positions, and the construction is simple, and the construction speed is fast, can avoid the pushing and dragging construction of steel truss, can save the construction period. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the front view schematic diagram of steel truss hoisting structure;

[0013] Figure 2 It is the side view schematic diagram of steel truss hoisting structure;

[0014] Figure 3 It is the overhead view schematic diagram of steel truss hoisting structure (remove diagonal rod);

[0015] Figure 4 It is Figure 3 The enlarged schematic diagram of A part in;

[0016] Figure 5 It is Figure 4 B-B direction schematic diagram in;

[0017] Figure 6 It is Figure 4 C-C direction schematic diagram in;

[0018] Figure 7 It is Figure 5 D-D direction schematic diagram in;

[0019] In the drawing, 1, steel truss, 2, bracket, 3, steel wire rope, 4, support I, 5, support II, 6, lug, 7, lifting hook, 8, the stiffening rib of lug, 9, the vertical stiffening rib of H-shaped steel, 10, the horizontal stiffening rib of H-shaped steel;

[0020] 1.1, the upright of steel truss, 1.2, the top chord of steel truss, 1.3, the lower chord of steel truss;

[0021] 2.1, bracket lower chord, 2.2, diagonal, 2.3, front beam, 2.4, rear beam, 2.5, reinforcing beam. DETAILED DESCRIPTION

[0022] The utility model will be further described below by non-restrictive examples and in conjunction with the drawings:

[0023] The utility model will be further described below by non-restrictive examples and in conjunction with the drawings:

[0024] As shown in the drawings, the steel truss 1 is 78 m long and 7.5 m high, the steel truss material is Q355qCNH, the upper chord and the lower chord of the steel truss adopt H500x500x18x28 hot-rolled H-shaped steel, the vertical rod adopts H500x500x18x26 hot-rolled H-shaped steel, the diagonal adopts HW350x350x12x19 hot-rolled H-shaped steel, the upper and lower cross beams adopt H500x400x14x24 hot-rolled H-shaped steel, and the longitudinal distance of the vertical rod of the steel truss is 5-6 m. The rod joint adopts bolted welding connection.

[0025] Due to the limitation of the high-voltage line at the top, a large-tonnage crane cannot be used for hoisting, the original design adopts steel beam jacking construction, in order to reduce the construction difficulty, a steel truss hoisting structure for limited hoisting height is designed.

[0026] The bracket 2 is provided at both ends of the steel truss 1 and is made of Q355, and comprises two bracket lower chords 2.1, two inclined rods 2.2, a front cross beam 2.3 and a rear cross beam 2.4 fixedly connected between the two bracket lower chords 2.1. The two bracket lower chords 2.1 are arranged along the longitudinal direction of the steel truss 1, and one end of each of the two bracket lower chords 2.1 is welded to the end of the lower chord 1.3 of the steel truss 1. One of the inclined rods 2.2 is fixedly connected between the other end of the bracket lower chord 2.1 and the two vertical rods 1.1 at the end of the steel truss 1, and the two ends of the inclined rod 2.2 are welded to the upper part of the vertical rod 1.1 and the outer end of the corresponding bracket lower chord 2.1, respectively. In order to increase the stability of the bracket, two reinforcing beams 2.5 are arranged between the front cross beam 2.3 and the rear cross beam 2.4 of the bracket 2, and the two ends of the reinforcing beam 2.5 are welded to the front cross beam 2.3 and the rear cross beam 2.4, respectively. Two lifting lugs 6 are fixed to the front cross beam 2.3 and the rear cross beam 2.4 of the bracket 2, respectively, and the lifting lug 6 is made of Q355. In order to improve the structural strength, a plurality of stiffening ribs 8 are welded between the lifting lug 6 and the front cross beam 2.3 / rear cross beam 2.4 of the bracket. In order to ensure the structural strength of the lifting structure, the rod style of the bracket 2 is consistent with the main rod style of the steel truss 1. That is, the bracket lower chord 2.1 is made of H500x500x18x28 hot-rolled H-shaped steel, the inclined rod 2.2 is made of HW350x350x12x19 hot-rolled H-shaped steel, the front cross beam 2.3 and the rear cross beam 2.4 are made of H500x400x14x24 hot-rolled H-shaped steel, and the two reinforcing beams 2.5 are made of H500x400x14x24 hot-rolled H-shaped steel. In order to ensure the structural strength, a plurality of horizontal stiffening ribs 10 and a plurality of vertical stiffening ribs 9 are welded between the wings of each H-shaped steel of the bracket 2.

[0027] In order to ensure the structural safety, the length of the bracket 2 should be less than the distance between the two longitudinal vertical rods 1.1 of the steel truss 1. The material of the bracket 2 should be consistent with that of the main steel truss. In the embodiment, the length of the bracket 2 is controlled to be 3m.

[0028] In order to ensure the structural safety, each weld should meet the design requirements. All welds of grade two should be subjected to 20% ultrasonic inspection, and the welds (corner welds) of the nodes and supports should be subjected to 20% magnetic powder coloring inspection.

[0029] In the specific construction, the steel truss with the lifting structure arranged at both ends is transported to the construction site, two cranes are used according to the weight of the steel truss, the steel truss is lifted to the designed position by the double-machine lifting mode, the supports of the steel truss are installed, and then the brackets at both ends of the steel truss are cut off. In order to ensure the construction safety, the steel truss should be tested before lifting.

[0030] The utility model discloses can reduce hoisting height, reduce construction difficulty, has enlarged the range of hoisting operation, is applicable to the construction occasion construction of hoisting height restriction.

[0031] Other parts in the embodiment are prior art and will not be described here.

Claims

1. A steel truss hoisting structure for hoisting with limited hoisting height, characterized in that: Two corbels are arranged at two ends of the steel truss, each of the corbels comprises two lower chord bars, two inclined bars, a front cross beam and a rear cross beam fixedly connected between the two lower chord bars, the lower chord bars are arranged along the longitudinal direction of the steel truss, one end of each of the two lower chord bars is fixedly connected with the end of the lower chord bar of the steel truss, one of the inclined bars is fixedly connected between the two vertical bars at the end of the steel truss and the other end of the two lower chord bars, the front cross beam and the rear cross beam of the corbel are respectively fixedly provided with two lifting lugs, and the bar type of the corbel is consistent with the bar type of the main body of the steel truss.

2. The steel truss girder hoisting structure for hoisting with a limited height according to claim 1, characterized in that: Two reinforcing beams are fixedly connected between the front cross beam and the rear cross beam of the corbel.

3. The steel truss girder hoisting structure for hoisting with a limited height according to claim 1 or 2, characterized in that: A reinforcing rib is arranged between the lifting lug and the front cross beam / rear cross beam of the corbel.

4. The steel truss girder hoisting structure for hoisting with a limited height according to claim 3, characterized in that: The length of the corbel is less than the distance between the two vertical bars of the steel truss.

5. The steel truss girder hoisting structure for hoisting with a limited height according to claim 4, characterized in that: The steel truss and the corbel are both made of H-shaped steel, and a plurality of horizontal reinforcing ribs and a plurality of vertical reinforcing ribs are welded between the wings of the H-shaped steel of the corbel.

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