Gantry crane track beam structure at expanded end of subway station

Abstract

The utility model relates to a track beam structure of a gantry crane at an expanded end of a subway station. The track beam structure comprises an expanded end crown beam, two supporting units and two first-section track beams, the two supporting units are arranged on the two opposite inner side walls of the expanded end crown beam correspondingly, and the two first-section track beams are arranged on the top faces of the two supporting units correspondingly. Two second-section track beams are arranged at the top end of the standard-section top beam communicated with the expanded-end top beam, the second-section track beams and the first-section track beams are arranged in a one-to-one correspondence mode, and the ends, facing the second-section track beams, of the first-section track beams are connected with the second-section track beams; the standard section crown beam is used as a track beam foundation, and the supporting unit is only arranged in the expanded end crown beam, so that the expanded end is convenient to hoist and construct, the construction cost is reduced, the hoisting efficiency of the expanded end crown beam is improved, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a gantry crane track beam structure at an enlarged end of a subway station. Background Art

[0002] At present, in the current subway station and shield industry, most of the vertical hoisting of stations only uses the crown beam as the track beam foundation in the standard section when gantry crane is arranged, or uses the crown beam at the expanded end and sets the track beam foundation separately outside the crown beam of the standard section for gantry crane arrangement. This leads to high construction cost of the gantry crane track beam foundation, which cannot cover the expanded end, resulting in low efficiency of vertical hoisting at the expanded end, high cost and long construction period if a truck crane is used alone. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a gantry crane track beam structure for the enlarged end of a subway station, which has the advantages of being able to reduce construction costs, improve the efficiency of vertical lifting at the enlarged end, and shorten the construction period.

[0004] The above-mentioned utility model object of the utility model is achieved through the following technical scheme: the utility model provides a subway station enlarged end gantry crane track beam structure, including an enlarged end crown beam, two support units and two first-section track beams; the two support units are respectively arranged on the two opposite inner walls of the enlarged end crown beam, and the two first-section track beams are respectively arranged on the top surfaces of the two support units; two second-section track beams are arranged at the top end of the standard section crown beam connected to the enlarged end crown beam, and the two second-section track beams are arranged opposite to each other, and the second-section track beams are arranged one-to-one with the first-section track beam, and the first-section track beam is connected to the second-section track beam at one end facing the second-section track beam.

[0005] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, the spacing between the two first-section track beams is equal to the spacing between the two second-section track beams.

[0006] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, the supporting unit includes a plurality of concrete corbels, one ends of the plurality of concrete corbels are connected to the inner wall of the enlarged end crown beam, the other ends of the plurality of concrete corbels extend inwardly along the first direction of the enlarged end crown beam, and the plurality of concrete corbels are spaced apart along the second direction of the enlarged end crown beam.

[0007] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, the first section of track beam includes a plurality of steel box beams, the plurality of steel box beams are all arranged on the top surface of the supporting unit, and the plurality of steel box beams are connected in sequence.

[0008] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, the length of each steel box beam ranges from 2m to 6m.

[0009] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, two adjacent steel box beams are connected by bolts.

[0010] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, the end surface of the concrete corbel facing away from the enlarged end crown beam is flush with the inner wall of the standard section crown beam.

[0011] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, the top surface of the concrete corbel and the top surface of the enlarged end crown beam are located in the same horizontal plane.

[0012] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, the first section of track beam and its corresponding second section of track beam together constitute the gantry crane track beam, and the top of the gantry crane track beam is provided with a gantry crane track.

[0013] Preferably, in the subway station enlarged end gantry crane track beam structure provided by the utility model, the bolts are high-strength bolts.

[0014] In summary, the beneficial technical effects of the utility model are as follows: the subway station enlarged end gantry crane track beam structure provided by the present application includes an enlarged end crown beam, two support units and two first-section track beams; the two support units are respectively arranged on the two opposite inner walls of the enlarged end crown beam, and the two first-section track beams are respectively arranged on the top surfaces of the two support units; two second-section track beams are arranged at the top of the standard section crown beam connected to the enlarged end crown beam, the two second-section track beams are arranged opposite to each other, the second-section track beams are arranged one-to-one with the first-section track beams, and the first-section track beam is connected to the second-section track beam at one end facing the second-section track beam; by setting the support unit, the standard section crown beam is used as the track beam foundation, and the support unit is only set in the enlarged end crown beam to realize the same width of the standard section of the subway station and the enlarged end gantry crane track gauge, thereby realizing the longitudinal movement of the gantry crane within the full length of the subway station, facilitating the enlarged end hoisting construction, reducing construction costs, improving the hoisting efficiency during the main body of the subway station and shield tunneling construction, and shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the gantry crane track beam structure at the expanded end of a subway station provided by an embodiment of the utility model.

[0016] Figure 2It is a BB cross-sectional view of the gantry crane track beam structure at the expanded end of a subway station provided by an embodiment of the utility model.

[0017] Figure 3 It is a CC cross-sectional view of the gantry crane track beam structure at the expanded end of a subway station provided by an embodiment of the utility model.

[0018] In the figure, 1. expanded end crown beam; 11. first direction; 12. second direction; 2. concrete corbel; 3. first section track beam; 31. steel box beam; 32. high-strength bolts; 4. standard section crown beam; 5. second section track beam; 6. gantry crane track. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] Reference Figures 1 to 3 , is a subway station expanded end gantry crane track beam structure disclosed by the utility model, comprising an expanded end crown beam 1, two supporting units and two first-section track beams 3; the two supporting units are respectively arranged on the two opposite inner side walls of the expanded end crown beam 1, and the two first-section track beams 3 are respectively arranged on the top surfaces of the two supporting units; two second-section track beams 5 are arranged at the top of the standard section crown beam 4 connected to the expanded end crown beam 1, the two second-section track beams 5 are arranged opposite to each other, the second-section track beams 5 are arranged one-to-one with the first-section track beams 3, and the first-section track beam 3 is connected to the second-section track beam 5 at one end facing the second-section track beam 5; by setting the supporting units, the standard section crown beam 4 is used as the track beam foundation, and the supporting units are only set in the expanded end crown beam 1, so as to realize that the standard section of the subway station has the same width as the expanded end gantry crane track 6, thereby realizing the gantry crane to move longitudinally within the full length of the subway station, which is convenient for the expanded end hoisting construction, reduces the construction cost, improves the hoisting efficiency during the main body of the subway station and the shield excavation construction, and shortens the construction period.

[0021] Specifically, the open end of the enlarged end crown beam 1 is connected to the standard section crown beam 4, and the width of the enlarged end crown beam 1 is greater than the width of the standard section crown beam 4. During the construction process, the standard section crown beam 4 is used as the foundation of the second section track beam 5, and the support unit is used as the foundation of the first section track beam 3.

[0022] It should be noted that the expanded end crown beam 1 is located at the top of the expanded end retaining pile, and the expanded end crown beam 1 is a C35 reinforced concrete structure.

[0023] Among them, one end of the support unit is connected to the inner wall of the expanded end crown beam 1, and the other end of the support unit extends inward to be flush with the inner wall of the standard section crown beam 4. During the construction process, the first section track beam 3 is arranged at the top of the support unit, one end of the first section track beam 3 is connected to the end of the corresponding second section track beam 5, and the other end of the first section track beam 3 extends to the expanded end crown beam 1. The first section track beam 3 and the corresponding second section track beam 5 together constitute the gantry crane track beam, and the top of the gantry crane track beam is provided with a gantry crane track 6.

[0024] It should be noted that the top surface of the support unit and the top surface of the enlarged end crown beam 1 are located in the same horizontal plane; this arrangement allows the top surface of the support unit to be flush with the top surface of the standard section crown beam 4 to facilitate the installation of the gantry crane track beam.

[0025] Furthermore, in the present embodiment, the spacing between the two first-section track beams 3 is equal to the spacing between the two second-section track beams 5; such an arrangement ensures that the track gauge of the standard section of the subway station and the expanded end gantry crane track 6 are the same width, thereby enabling the gantry crane to move longitudinally within the entire length of the subway station, facilitating the expansion end hoisting construction and reducing the construction cost of the gantry crane track beams.

[0026] Furthermore, in this embodiment, the supporting unit includes a plurality of concrete corbels 2, one ends of the plurality of concrete corbels 2 are connected to the inner wall of the enlarged end crown beam 1, the other ends of the plurality of concrete corbels 2 extend inward along the first direction 11 of the enlarged end crown beam 1, and the plurality of concrete corbels 2 are arranged at intervals along the second direction 12 of the enlarged end crown beam 1.

[0027] It should be noted that the first direction 11 of the enlarged end crown beam 1 is the width direction of the enlarged end crown beam 1 , and the second direction 12 of the enlarged end crown beam 1 is the length direction of the enlarged end crown beam 1 .

[0028] Specifically, the concrete corbel 2 is a C35 reinforced concrete structure, which is rooted from the enlarged end crown beam 1, and is tied with steel bars and poured with concrete together with the enlarged end crown beam 1, so as to support the upper first section track beam 3.

[0029] The end surface of the concrete corbel 2 which faces away from the enlarged end crown beam 1 is flush with the inner wall of the standard section crown beam 4 .

[0030] Specifically, one end of the concrete corbel 2 that is away from the enlarged end crown beam 1 extends along the first direction 11 until it is flush with the inner side wall of the standard section crown beam 4 .

[0031] The top surface of the concrete corbel 2 and the top surface of the enlarged end crown beam 1 are located at the same horizontal plane.

[0032] During the construction process, the first section of track beam 3 is installed on the top surface of multiple concrete corbels 2.

[0033] Furthermore, in the present embodiment, the first section of track beam 3 comprises a plurality of steel box beams 31, and the plurality of steel box beams 31 are all arranged on the top surface of the supporting unit, and the plurality of steel box beams 31 are connected in sequence; by arranging the first section of track beam 3 to be spliced ​​together by a plurality of steel box beams 31, it can be spliced ​​and lengthened at any time according to the length of the crown beam 1 at the expanded end of the station, and is suitable for stations with various expanded end lengths with different lengths, and the steel box beams 31 can be reused, thereby realizing resource saving and cost reduction.

[0034] Among them, the steel box girder 31 adopts a spliced ​​steel box girder 31.

[0035] Specifically, the first track beam 3 extends along the second direction 12, and two adjacent steel box beams 31 are connected by bolts, and the bolts are high-strength bolts 32. Figure 1 Taking the shown orientation as an example, the steel box beam 31 at the end is used to connect with the end of the second section track beam 5.

[0036] The length of each steel box girder 31 ranges from 2m to 6m. In this embodiment, the length of the steel box girder 31 is 4m.

[0037] The process of setting the rail beam structure of the gantry crane at the expanded end of the subway station provided in this embodiment is as follows:

[0038] (1) Measurement and staking: Calculate the coordinates of the expanded end crown beam 1 and the concrete corbel 2 in the support unit according to the coordinates provided in the design drawings to locate the edge line. Perform measurement and staking on the upper part of the crown beam cushion layer, and lay out the expanded end crown beam and the positioning edge line of the support unit on the cushion layer.

[0039] (2) Tie up the reinforcement of the expanded end crown beam 1 and the concrete corbel 2: The reinforcement is processed in a centralized manner in the reinforcement shed. After the reinforcement arrives at the site, the laboratory will take samples of the raw reinforcement materials for inspection. Only qualified ones can be used. The reinforcement should be processed strictly in accordance with the design drawings and relevant specifications, and attention should be paid to rain and rust prevention.

[0040] During construction, the steel bars must be positioned accurately. Before tying the steel bars, the positioning lines of the crown beam and concrete corbels are marked on the cushion layer, and the steel bars are installed and tied according to the positioning lines. The main steel bars are overlapped by mechanical connection or welding. The main bars of the concrete corbels at the connection between the crown beam and the concrete corbels are anchored into the expanded end crown beam, and the anchorage length is not less than 35d; the stirrups of the expanded end crown beam and the concrete corbels in the support unit are tied and connected with the main bars and the axillary reinforcement bars.

[0041] Among them, the intersection of the steel bars must be tied firmly without deformation or loosening; the length of the single-sided welded joint of the steel bar shall not be less than 10d; the lap length of the tied joint shall not be less than 35d; after the steel bar is tied, the quality inspection personnel of the project department shall conduct self-inspection, and report to the supervisor for acceptance after passing the self-inspection. Only after passing the acceptance can the next construction process be carried out.

[0042] It should be noted that 10d means 10 times the diameter of the steel bar; 35d means 35 times the diameter of the steel bar.

[0043] (3) Formwork support: The side formwork of the expanded end crown beam 1 and the concrete corbel 2 uses a 0.9m×1.5m steel formwork. The formwork reinforcement uses two rows of upper and lower tie rods for bidirectional tensioning, and the distance between adjacent tie rods is 1m. Before the formwork is supported, it is polished and rust-removed, and an isolation agent is applied to ensure that the formwork is clean, flat, and smooth before concrete pouring. Before concrete pouring, the top surface elevation of the expanded end crown beam 1 and the concrete corbel 2 is set out on the formwork surface to control the top surface elevation.

[0044] (4) Concrete pouring: C35 concrete is used for the expanded end crown beam 1 and the concrete corbel 2. The concrete pouring method is to pump the concrete into the formwork with a concrete pump truck. Before pouring concrete, the construction site should be prepared and the concrete vibrator should be checked to ensure that the concrete vibrator is intact and meets the requirements. Among them, the garbage and debris in the formwork should be cleaned up. After the concrete mixer truck enters the site, the quality of concrete should be strictly controlled. The slump of concrete should be controlled within the range of 180-220mm. The operation of the vibrator should be "fast insertion and slow withdrawal". Concrete vibration should be carried out at different points. It is advisable to vibrate the concrete at the material inlet first to form a natural flow slope, and then vibrate comprehensively, and strictly control the vibration time, moving spacing, and insertion depth.

[0045] The concrete is vibrated with an inserted vibrator, and the vibration interval is about 50cm, until the concrete surface is slurry and no large number of bubbles are generated, to prevent the concrete from vibrating insufficiently or vibrating excessively in one place and causing the mold to run. The top surface of the concrete is finished with a wooden mold to ensure that its surface is flat and the height is consistent, so as to ensure the installation quality of the steel box girder 31.

[0046] (5) Formwork removal and maintenance: When removing the formwork, follow the procedure and do not hit it with a sledgehammer to prevent cracks on the concrete surface. Sprinkle water on the concrete for maintenance within 7 days after pouring. Cover the concrete with geotextile before sprinkling water to ensure that the concrete surface retains moisture for a longer period of time.

[0047] (6) Install the first section of track beam: The steel box beam 31 uses a finished steel box beam 31. The length of each section of the steel box beam 31 ranges from 2m to 6m. In this embodiment, the steel box beam 31 is 4m long. After arriving at the site, its quality is inspected and accepted to ensure that the strength and anti-rust performance of the steel box beam 31 are correct before it can be put into use.

[0048] The hoisting equipment is a 25T truck crane. During the hoisting, the steel box girder 31 is hoisted by bundling at both ends, and the hoisting point is 50cm away from the end of the steel box girder 31. The first and second sections of the steel box girder 31 are hoisted in place and placed on the concrete corbel 2 for assembly. The first section of the steel box girder 31 is connected to the second section of the steel box girder 31 by tightening high-strength bolts 32 to ensure the connection strength, and then the third and fourth sections of the steel box girder 31 are assembled in sequence.

[0049] (7) Install the gantry crane track: After the steel box girder 31 is assembled and checked to be correct, its top surface elevation is reviewed. After confirmation, the center line of the gantry crane track 6 is measured and laid out. The gantry crane track 6 is installed and fixed by hoisting.

[0050] After the gantry crane track 6 is checked and found to be correct, the gantry crane is installed and tested. After the test run is correct, the gantry crane is accepted and put into use after the acceptance is passed.

[0051] The subway station enlarged end gantry crane track beam structure provided in the present application includes an enlarged end crown beam 1, two support units and two first-section track beams 3; the two support units are respectively arranged on the two opposite inner walls of the enlarged end crown beam 1, and the two first-section track beams 3 are respectively arranged on the top surfaces of the two support units; two second-section track beams 5 are arranged at the top of the standard section crown beam 4 connected to the enlarged end crown beam 1, the two second-section track beams 5 are relatively arranged, the second-section track beams 5 are arranged one-to-one with the first-section track beams 3, and the first-section track beam 3 is connected to the second-section track beam 5 at one end facing the second-section track beam 5; by setting the support unit, the standard section crown beam 4 is used as the track beam foundation, and the support unit is only set in the enlarged end crown beam 1, so as to realize that the standard section of the subway station and the enlarged end gantry crane track 6 have the same width, thereby realizing the gantry crane to move longitudinally within the full length of the subway station, which is convenient for the enlarged end hoisting construction, reduces the construction cost, improves the hoisting efficiency during the main body of the subway station and the shield tunneling construction, and shortens the construction period.

[0052] The subway station enlarged end gantry crane track beam structure provided by the utility model has simple structure, convenient construction and strong applicability.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0054] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A subway station enlarged end gantry crane track beam structure, characterized in that: It includes an enlarged end crown beam, two support units and two first-section track beams; The two support units are respectively arranged on two opposite inner side walls of the enlarged end crown beam, and the two first section track beams are respectively arranged on the top surfaces of the two support units; Two second-section track beams are arranged at the top end of the standard section crown beam connected to the expanded end crown beam. The two second-section track beams are arranged opposite to each other, and the second-section track beams are arranged one-to-one corresponding to the first-section track beam. The first-section track beam is connected to the second-section track beam at one end facing the second-section track beam.

2. The subway station enlarged end gantry crane track beam structure according to claim 1, characterized in that: The distance between the two first-section track beams is equal to the distance between the two second-section track beams.

3. The subway station enlarged end gantry crane track beam structure according to claim 1, characterized in that: The support unit includes a plurality of concrete corbels, one ends of the plurality of concrete corbels are connected to the inner side wall of the enlarged end crown beam, the other ends of the plurality of concrete corbels extend inward along a first direction of the enlarged end crown beam, and the plurality of concrete corbels are spaced apart along a second direction of the enlarged end crown beam.

4. The subway station enlarged end gantry crane track beam structure according to claim 1, characterized in that: The first section of track beam includes a plurality of steel box beams, and the plurality of steel box beams are all arranged on the top surface of the supporting unit, and the plurality of steel box beams are connected in sequence.

5. The subway station enlarged end gantry crane track beam structure according to claim 4, characterized in that: The length of each steel box girder ranges from 2m to 6m.

6. The subway station enlarged end gantry crane track beam structure according to any one of claims 4-5, characterized in that: Two adjacent steel box girders are connected by bolts.

7. The subway station enlarged end gantry crane track beam structure according to claim 3, characterized in that: The end surface of the concrete corbel facing away from the enlarged end crown beam is flush with the inner side wall of the standard section crown beam.

8. The subway station enlarged end gantry crane track beam structure according to claim 3, characterized in that: The top surface of the concrete corbel and the top surface of the enlarged end crown beam are located at the same horizontal plane.

9. The subway station enlarged end gantry crane track beam structure according to claim 1, characterized in that: The first section of track beam and its corresponding second section of track beam together constitute a gantry crane track beam, and a gantry crane track is arranged at the top of the gantry crane track beam.

10. The subway station enlarged end gantry crane track beam structure according to claim 6, characterized in that: The bolts are high-strength bolts.

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