Combined track beam structure for portal crane across shaft

Abstract

The utility model discloses a kind of across shaft portal crane combined track beam structure, including the reinforced concrete track beam of ground part;Combined track beam across shaft part, the combined track beam is composed of custom steel box girder and the reinforced concrete track beam arranged thereon;Custom steel box girder is connected with enclosure structure by pre-embedded steel plate, and its top elevation is flush with the top elevation of the reinforced concrete track beam of ground part;Combined track beam and the reinforced concrete track beam of ground part are connected, form continuous portal crane track support structure;The device solves the problem that the track beam cannot be set on the ground due to the limitations of site or the width and span of foundation pit in the prior art;It has the characteristics that large-diameter circular shaft portal crane track beam can be arranged across shaft.

Description

Technical Field

[0001] This utility model belongs to the field of municipal construction engineering technology, and in particular relates to a combined track beam structure for a gantry crane spanning a vertical shaft. Background Technology

[0002] In urban rail transit, water conservancy tunnels, and integrated utility tunnels, circular shafts are widely used due to their good structural stress and small construction site area. In recent years, with the acceleration of urbanization, circular shafts have been developing towards larger diameters. However, due to the difficulty in coordinating site acquisition and demolition for urbanization construction or the limitations of the equipment itself, gantry crane track beams inevitably have to cross the circular shaft, which makes construction difficult and poses high safety risks. Therefore, it is necessary to design a combined track beam structure for gantry cranes that cross the shaft to solve the above problems. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a combined track beam structure for a gantry crane spanning a vertical shaft, which aims to solve the problem that existing technologies cannot set the track beam on the ground due to site limitations or large pit width and span; it has the feature of arranging track beams for large-diameter circular gantry cranes across the vertical shaft.

[0004] To achieve the above-mentioned technical effects, the technical solution adopted by this utility model is as follows:

[0005] A combined track beam structure for a gantry crane spanning a vertical shaft includes a reinforced concrete track beam on the ground and a combined track beam spanning the vertical shaft, wherein the combined track beam consists of a custom-made steel box girder and a reinforced concrete track beam mounted thereon.

[0006] Preferably, the customized steel box girder is connected to the enclosure structure through pre-embedded steel plates, and its top elevation is flush with the top elevation of the reinforced concrete track beam on the ground.

[0007] Preferably, the combined track beam is connected to the reinforced concrete track beam on the ground to form a continuous gantry crane track support structure.

[0008] Preferably, the retaining structure is a diaphragm wall with a thickness of 1000mm; a U-shaped capping beam and a pre-embedded steel plate are provided at the intersection of the retaining structure and the steel box girder to prevent uneven settlement of the retaining structure.

[0009] Furthermore, the total length of the customized steel box girder is 29.7m, the length of the overhead area across the well is 24.3m, and it is connected with Q235B I-beams and flanges, with a total weight of approximately 45t.

[0010] Preferably, the lifting lugs of the steel box girder are welded to the top plate of the main body of the box girder. The wall thickness of the lifting lug steel plate is δ=25+25+25mm, the material is Q345qD high-strength steel plate, and it is set at the connection between the web plate and the diaphragm. During hoisting, four-point lifting is adopted, and the horizontal angle of the lifting rope is α=60°.

[0011] Preferably, an overlap area is reserved at the joint between the steel box girder and the reinforced concrete track beam on the ground; the overlap area is welded together by the track beam reinforcement, and the bottom is welded to the embedded part and then poured with concrete; a 50cm overlap area is reserved at the joint between the steel box girder and the reinforced concrete track beam on the ground; the overlap area is welded together by the track beam reinforcement in a “7” shape, with a welding length of 35d, and the bottom is welded to the embedded part and then poured with C35 concrete to enhance shear and slip resistance.

[0012] Furthermore, the cross-sectional dimensions, reinforcement type, and concrete strength grade of the reinforced concrete track beam are determined based on the tonnage of the gantry crane; 300×150mm steel plates are pre-embedded every 0.5m along the track beam foundation, with a steel plate thickness of 15mm, and two L-shaped Φ18 steel bars are welded to each steel plate, with a steel bar length of 300+80mm; a 100×80mm track pressure plate is welded to each pre-embedded steel plate, with a steel plate thickness of 10mm.

[0013] Preferably, a guardrail is installed in the area of ​​the combined track beam spanning the vertical shaft to ensure the safety of maintenance and upkeep of the gantry crane track beam; the guardrail is reliably installed and has warning signs.

[0014] The beneficial effects of this utility model are as follows:

[0015] This device solves the problem that existing technologies cannot place track beams on the ground due to site limitations or large pit widths and spans. It further arranges track beams by arranging box girder structures and fixes them with fence structures. It has the feature of arranging track beams of large-diameter circular vertical shaft gantry cranes across the vertical shaft. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the steel box girder of this utility model;

[0017] Figure 2 This is a plan view of the steel box girder in an embodiment of this utility model;

[0018] In the diagram: 1. Reinforced concrete track beam on the ground; 2. Composite track beam; 3. Reinforced concrete track beam of composite track beam; 4. Steel box girder. Detailed Implementation

[0019] Example 1:

[0020] like Figure 1 and Figure 2As shown, the combined track beam structure of the gantry crane spanning the vertical shaft includes a reinforced concrete track beam 1 on the ground and a combined track beam 2 spanning the vertical shaft. The combined track beam is composed of a custom steel box girder and a reinforced concrete track beam mounted on it.

[0021] Preferably, the customized steel box girder is connected to the enclosure structure through pre-embedded steel plates, and its top elevation is flush with the top elevation of the reinforced concrete track beam on the ground.

[0022] Preferably, the combined track beam 2 is connected sequentially to the reinforced concrete track beam 1 on the ground to form a continuous gantry crane track support structure.

[0023] Preferably, the retaining structure is a diaphragm wall with a thickness of 1000mm; a U-shaped capping beam and a pre-embedded steel plate are provided at the intersection of the retaining structure and the steel box girder to prevent uneven settlement of the retaining structure.

[0024] Furthermore, the total length of the customized steel box girder is 29.7m, the length of the overhead area across the well is 24.3m, and it is connected with Q235B I-beams and flanges, with a total weight of approximately 45t.

[0025] Preferably, the lifting lugs of the steel box girder are welded to the top plate of the main body of the box girder. The wall thickness of the lifting lug steel plate is δ=25+25+25mm, the material is Q345qD high-strength steel plate, and it is set at the connection between the web plate and the diaphragm. During hoisting, four-point lifting is adopted, and the horizontal angle of the lifting rope is α=60°.

[0026] Preferably, an overlap area is reserved at the joint between the steel box girder and the reinforced concrete track beam on the ground; the overlap area is welded together by the track beam reinforcement, and the bottom is welded to the embedded part and then poured with concrete; a 50cm overlap area is reserved at the joint between the steel box girder and the reinforced concrete track beam 1 on the ground; the overlap area is welded together by the track beam reinforcement in a “7” shape, with a welding length of 35d, and the bottom is welded to the embedded part and then poured with C35 concrete to enhance shear and slip resistance.

[0027] Furthermore, the cross-sectional dimensions, reinforcement type, and concrete strength grade of the reinforced concrete track beam 1 are determined based on the tonnage of the gantry crane; 300×150mm steel plates are pre-embedded every 0.5m along the track beam foundation, with a steel plate thickness of 15mm, and two L-shaped Φ18 steel bars are welded to each steel plate, with a steel bar length of 300+80mm; a 100×80mm track pressure plate is welded to each pre-embedded steel plate, with a steel plate thickness of 10mm.

[0028] Preferably, a guardrail is installed in the area of ​​the combined track beam spanning the vertical shaft to ensure the safety of maintenance and upkeep of the gantry crane track beam; the guardrail is reliably installed and has warning signs.

[0029] Example 2:

[0030] The working principle is as follows:

[0031] Gantry crane selection: Determine the appropriate gantry crane based on the project requirements.

[0032] Concrete track beam design: Calculate the track beam cross-sectional dimensions, reinforcement type, and concrete strength grade based on the tonnage of the gantry crane.

[0033] Steel box girder fabrication: Determine the dimensions and structural form of the steel box girder based on the span of the gantry crane.

[0034] Enclosure structure treatment: Based on the height h and width b of the steel box girder, remove the capping beam at the intersection of the enclosure structure and the steel box girder (if necessary, part of the enclosure structure may need to be removed) and install embedded steel plates.

[0035] Construction of the composite track beam: The customized steel box girder is erected in the area spanned by the vertical shaft using a "segmented connection and overall hoisting" method. After erection, a reinforced concrete track beam is installed on the steel box girder and connected to the reinforced concrete track beam of the ground gantry crane. The track and fasteners are then installed sequentially.

[0036] Construction of auxiliary structures: Guardrails will be installed in the area of ​​the combined track beam spanning the foundation pit to ensure the safety of subsequent maintenance and repair work on the gantry crane track beam.

Claims

1. A combined track beam structure for a gantry crane spanning a vertical shaft, characterized in that, Includes a reinforced concrete track beam for the ground portion; and a composite track beam spanning the vertical shaft portion, the composite track beam consisting of a custom-made steel box girder and a reinforced concrete track beam mounted thereon.

2. The combined track beam structure for a gantry crane spanning a vertical shaft according to claim 1, characterized in that, The customized steel box girder is connected to the enclosure structure through pre-embedded steel plates, and its top elevation is flush with the top elevation of the reinforced concrete track beam on the ground.

3. The combined track beam structure for a gantry crane spanning a vertical shaft according to claim 2, characterized in that, The combined track beam is connected to the reinforced concrete track beam on the ground to form a continuous gantry crane track support structure.

4. The combined track beam structure for a gantry crane spanning a vertical shaft according to claim 2, characterized in that, The retaining structure is a diaphragm wall; a "U"-shaped capping beam and a pre-embedded steel plate are provided at the intersection of the retaining structure and the steel box girder to prevent uneven settlement of the retaining structure.

5. The combined track beam structure for a gantry crane spanning a vertical shaft according to claim 1, characterized in that, The lifting lugs of the steel box girder are welded to the top plate of the main body of the box girder, and the lifting lug steel plates are set at the connection between the web and the diaphragm.

6. The combined track beam structure for a gantry crane spanning a vertical shaft according to claim 5, characterized in that, An overlap area is reserved at the joint between the steel box girder and the reinforced concrete track beam on the ground. The overlap area is welded together by the track beam reinforcement, and the bottom is welded to the embedded parts and then concrete is poured.

7. The combined track beam structure for a gantry crane spanning a vertical shaft according to claim 6, characterized in that, A railing is installed in the area of ​​the combined track beam spanning the vertical shaft, and the railing is equipped with warning signs.

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