Portal crane track beam structure for subway shield excavation hole

Abstract

The utility model discloses a gantry crane track beam structure for subway shield unearthed hole, including the unearthed hole of subway station, the both sides of unearthed hole are equipped with the bottom beam respectively, the bottom beam is perpendicular with the longitudinal direction of subway station, and both ends of bottom beam are arranged on the side wall of both sides of subway station respectively, and the middle part is supported on the roof of subway station and is turned on the beam, is equipped with the track on bottom beam to and has reserved the through -hole for the pipeline to pass through, the top of bottom beam is equipped with the recess for the recovery green belt. The gantry crane track beam structure for subway shield unearthed hole increases the bearing capacity and reduces the construction cost.

Description

Technical Field

[0001] This utility model relates to the field of subway construction technology, specifically to a gantry crane track beam structure used for the tunnel boring machine exit hole of a subway. Background Technology

[0002] With the deepening of urbanization, subways are becoming increasingly common in large and medium-sized cities. Subway stations are generally laid along main urban roads, and the sections between two stations are primarily constructed using the shield tunneling method, with earth pressure balance (EPB) type tunneling machines being the main type. To ensure the normal removal of excavated soil from the tunnel section, stations using EPB tunneling machines require two excavation holes to be pre-reserved on the structural slab, and gantry cranes are arranged on both sides of the excavation holes to lift the excavated soil into the slag pit. To ensure the tunneling efficiency of the tunnel section, the weight of a single excavation bucket can reach about 40 tons. Considering the weight of the gantry cranes, using steel structures as the track beams for the excavation holes cannot meet the stress requirements.

[0003] Current technologies primarily involve installing steel or reinforced concrete track beams on both sides of the tunnel entrance, perpendicular to the station, and above the station roof. Steel track beams have limited load-bearing capacity, resulting in a limited volume of excavated soil that can be hoisted from the shield tunnel in a single operation, directly impacting the tunneling speed. Conventional reinforced concrete track beams require backfilling, pipeline relocation, and landscaping restoration above the starting station roof after the shield tunnel is completed. Furthermore, the relocated pipelines and trees running parallel to the station conflict with the track beams, necessitating mechanical vibration to break them up before backfilling. This directly affects the station's waterproofing and leads to significant costs and delays.

[0004] Chinese patent document with application number 202121284408.1 discloses a gantry crane track beam structure for a subway shield tunneling hoisting hole, including a track, a bottom beam, and a diaphragm wall and a retaining wall located in the subway station. The diaphragm wall and the retaining wall enclose the shield tunneling hoisting hole. The bottom beam spans the top of the shield tunneling hoisting hole, with one end of the bottom beam supported on the diaphragm wall on one side of the shield tunneling hoisting hole to form a first support end, and the other end supported on the retaining wall on the other side of the shield tunneling hoisting hole to form a second support end. The two ends of the track are fixed to the first support end and the second support end respectively by a first fixing mechanism, and the two ends of the track extend to the road surface on both sides of the shield tunneling hoisting hole. The middle section of the track is fixed to the middle section of the bottom beam by a second fixing mechanism. The gantry crane track beam structure used for the shield tunneling hoisting hole of the subway has many advantages, but it also has the following disadvantages: 1) The bottom beam spans the top of the shield tunneling hoisting hole and is supported on the retaining wall, that is, supported at both ends and suspended in the middle. Its bearing capacity is limited, resulting in a limited capacity of excavated soil in the shield section that can be hoisted at one time, which directly affects the shield tunneling speed. In addition, the bottom beam occupies the space of the hoisting hole, which may affect the soil removal operation; 2) It needs to be completely dismantled in the later stage, resulting in high construction costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a gantry crane track beam structure for subway shield tunneling excavation holes with increased load-bearing capacity and reduced construction costs.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A gantry crane track beam structure for a tunnel boring machine (TBM) exit hole in a subway station includes an exit hole located in the subway station. Bottom beams are provided on both sides of the exit hole. The bottom beams are perpendicular to the longitudinal direction of the subway station. The two ends of the bottom beams are respectively located on the side walls on both sides of the subway station, and the middle part is supported on a flip beam on the top plate of the subway station. The bottom beams are provided with tracks and have reserved through holes for pipelines to pass through. The top of the bottom beams is provided with grooves for restoring green belts.

[0007] As a further improvement to the above technical solution: The bottom beam is a reinforced concrete beam.

[0008] The two ends of the track extend to the road surface on both sides of the excavation hole.

[0009] The top of the side wall is provided with a crown beam, and the outer side of the crown beam is provided with an outer support beam. The outer support beam is supported on the ground, and the end of the track is supported on the corresponding outer support beam.

[0010] A plain concrete pad is placed between the external support beam and the ground.

[0011] The outer end of the outer support beam is provided with a rail stop column, which abuts against the end face of the rail.

[0012] The groove is provided with a support rod perpendicular to the track. The track is fixed to the support rod by a first fixing mechanism and the track is fixed to the bottom beam by a second fixing mechanism.

[0013] The first fixing mechanism includes a pair of first pressure plates, which are fixed to the support rod by a first fastener and pressed against the bottom sides of the track respectively. The top of the first pressure plate is provided with an upper support surface, which is an inclined surface that is higher on the side closer to the track than on the other side. The first fastener is provided with a lower pressure block, which is pressed against the upper support surface.

[0014] The second fixing mechanism includes a pair of second pressure plates, which are fixed to the bottom beam by second fasteners and pressed against the bottom sides of the track respectively.

[0015] Temporary supports are provided inside the through hole.

[0016] Compared with the prior art, the advantages of this utility model are: This utility model discloses a gantry crane track beam structure for a subway shield tunneling excavation hole. First, the two ends of the bottom beam are respectively set on the side walls on both sides of the subway station, and the middle is supported on the flip beam on the top plate of the subway station. Compared with the structure with both ends supported and the middle completely suspended, its load-bearing capacity is increased, thereby increasing the capacity of the shield tunneling section of excavated soil to be lifted in a single operation and thus increasing the shield tunneling speed. Second, the bottom beam can be used as a retaining wall for the excavation hole and does not need to be demolished later, reducing construction costs. Attached Figure Description

[0017] Figure 1 This is a top view schematic diagram of the gantry crane track beam structure used in the tunnel boring machine exit hole of the subway.

[0018] Figure 2 This is a schematic diagram of the main structure of the gantry crane track beam structure used for the tunnel boring machine exit hole of the subway.

[0019] Figure 3 This is a schematic diagram of the first fixing mechanism of the gantry crane track beam structure used in the tunnel boring machine exit hole of the subway.

[0020] Figure 4 This is a schematic diagram of the second fixing mechanism of the gantry crane track beam structure used in the tunnel boring machine exit hole of the subway.

[0021] The labels in the diagram represent: 1. Subway station; 11. Side wall; 2. Excavation hole; 3. Bottom beam; 31. Through hole; 311. Temporary support; 32. Groove; 321. Support rod; 4. Track; 5. Top slab flip beam; 6. Crown beam; 7. External support beam; 71. Plain concrete pad; 72. Rail retaining column; 8. First fixing mechanism; 81. First pressure plate; 811. Upper support surface; 82. First fastener; 821. Lower pressure block; 9. Second fixing mechanism; 91. Second pressure plate; 92. Second fastener. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Figures 1 to 4 This invention illustrates an embodiment of the gantry crane track beam structure for a subway shield tunnel excavation hole. The gantry crane track beam structure for a subway shield tunnel excavation hole in this embodiment includes an excavation hole 2 located in a subway station 1. Bottom beams 3 are respectively provided on both sides of the excavation hole 2. The bottom beams 3 are perpendicular to the longitudinal direction of the subway station 1. The two ends of the bottom beams 3 are respectively provided on the side walls 11 on both sides of the subway station 1, and the middle is supported on the top plate of the subway station 1 on the flip beam 5. The bottom beams 3 are provided with a track 4 and have reserved through holes 31 for pipelines to pass through. The top of the bottom beams 3 is provided with a groove 32 for restoring the green belt.

[0027] The track beam structure of this gantry crane has two main features. First, the two ends of the bottom beam 3 are respectively set on the side walls 11 on both sides of the subway station 1, and the middle is supported on the flip beam 5 on the top slab of the subway station 1. Compared with the structure with both ends supported and the middle completely suspended, its load-bearing capacity is increased, thereby increasing the capacity of the shield tunnel section soil to be lifted in a single operation and thus increasing the shield tunneling speed. Second, the bottom beam 3 can be used as a retaining wall for the excavation hole 2, and does not need to be demolished later, thus reducing construction costs.

[0028] Furthermore, in this embodiment, the bottom beam 3 is a reinforced concrete beam, which facilitates formwork erection and pouring construction.

[0029] Furthermore, such as Figure 2 As shown, in this embodiment, the two ends of the track 4 extend to the road surface on both sides of the excavation hole 2, which facilitates the gantry crane to go up and down the track 4.

[0030] Furthermore, in this embodiment, a crown beam 6 is provided at the top of the side wall 11, and an outer support beam 7 is provided on the outside of the crown beam 6. The outer support beam 7 is supported on the ground, and the end of the track 4 is supported on the corresponding outer support beam 7, thereby improving the stability of the track 4.

[0031] Furthermore, in this embodiment, a plain concrete pad 71 is provided between the external support beam 7 and the ground.

[0032] Furthermore, in this embodiment, the outer end of the outer support beam 7 is provided with a guide rail post 72, which abuts against the end face of the track 4, further improving the stability of the track 4.

[0033] Furthermore, in this embodiment, a support rod 321 perpendicular to the track 4 is provided in the groove 32. The track 4 is fixed to the support rod 321 by a first fixing mechanism 8, and the track 4 is fixed to the bottom beam 3 by a second fixing mechanism 9. The track 4 is fixed to the support rod 321 by the first fixing mechanism 8 to prevent the track 4 from sinking in the groove 32. At the same time, it is convenient to remove the track 4 and the support rod 321 later to fill the groove 32 with soil and plant grass and trees to restore the green belt.

[0034] Furthermore, such as Figure 3 As shown, in this embodiment, the first fixing mechanism 8 includes a pair of first pressure plates 81. The pair of first pressure plates 81 are fixed to the support rods 321 by first fasteners 82 and are respectively pressed against the bottom sides of the track 4. The top of the first pressure plate 81 is provided with an upper support surface 811, which is an inclined surface that is higher on the side closer to the track 4 than on the other side. The first fastener 82 is provided with a lower pressure block 821, which presses against the upper support surface 811. Since the upper support surface 811 is an inclined surface that is higher on the side closer to the track 4 than on the other side, when the first fastener 82 applies downward pressure to the lower pressure block 821, the lower pressure block 821 has a vertically downward component force and a horizontally inward component force on the upper support surface 811, so that the pair of upper support surfaces 811 clamp the bottom of the track 4, thereby improving the fixing effect of the track 4. Preferably, the first fastener 82 is a fastening bolt. Multiple support rods 321 can be provided and arranged at equal intervals along the length direction of the track 4.

[0035] Furthermore, such as Figure 4 As shown, in this embodiment, the second fixing mechanism 9 includes a pair of second pressure plates 91. The pair of second pressure plates 91 are fixed to the bottom beam 3 by second fasteners 92 and are respectively pressed against the bottom sides of the track 4. The second fastener 92 includes an anchor rod and a nut. The anchor rod is pre-embedded in the bottom beam 3, and the nut is threaded to the top of the anchor rod and presses the second pressure plates 91 so that the second pressure plates 91 are pressed against the bottom of the track 4. Specifically, the cross-section of the track 4 is I-shaped.

[0036] Furthermore, in this embodiment, a temporary support 311 is provided within the through hole 31 to ensure the load-bearing capacity of the bottom beam 3 when the through hole 31 is large. Preferably, the temporary support 311 is a steel reinforcement brace. Multiple through holes 31 may be provided.

[0037] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A gantry crane track beam structure for a subway shield excavation hole, characterized in that: The system includes an excavation hole (2) located in the subway station (1). The excavation hole (2) has a bottom beam (3) on both sides. The bottom beam (3) is perpendicular to the longitudinal direction of the subway station (1). The two ends of the bottom beam (3) are respectively located on the side walls (11) on both sides of the subway station (1) and the middle part is supported on the top plate of the subway station (1) on the flip beam (5). The bottom beam (3) has a track (4) and a through hole (31) reserved for pipelines to pass through. The top of the bottom beam (3) has a groove (32) for restoring the green belt.

2. The portal crane track beam structure for a subway shield excavation hole according to claim 1, characterized in that: The bottom beam (3) is a reinforced concrete beam.

3. The portal crane track beam structure for the subway shield excavation hole according to claim 1, characterized in that: The two ends of the track (4) extend to the road surface on both sides of the excavation hole (2).

4. The portal crane track beam structure for the subway shield excavation hole according to claim 1, characterized in that: The top of the side wall (11) is provided with a crown beam (6), and an outer support beam (7) is provided on the outside of the crown beam (6). The outer support beam (7) is supported on the ground, and the end of the track (4) is supported on the corresponding outer support beam (7).

5. The portal crane track beam structure for a subway shield excavation hole according to claim 4, characterized in that: A plain concrete pad (71) is placed between the external support beam (7) and the ground.

6. The portal crane track beam structure for a subway shield excavation hole according to claim 4, characterized in that: The outer end of the outer support beam (7) is provided with a rail stop column (72), and the rail stop column (72) abuts against the end face of the track (4).

7. The portal gantry track beam structure for a subway shield excavation portal according to any one of claims 1 to 6, characterized in that: The groove (32) is provided with a support rod (321) perpendicular to the track (4). The track (4) is fixed on the support rod (321) by the first fixing mechanism (8). The track (4) is fixed on the bottom beam (3) by the second fixing mechanism (9).

8. The portal crane track beam structure for a subway shield excavation hole according to claim 7, characterized in that: The first fixing mechanism (8) includes a pair of first pressure plates (81). The pair of first pressure plates (81) are fixed to the support rod (321) by the first fastener (82) and pressed against the bottom sides of the track (4). The top of the first pressure plate (81) is provided with an upper support surface (811). The upper support surface (811) is an inclined surface that is higher on one side than on the other side near the track (4). The first fastener (82) is provided with a lower pressure block (821). The lower pressure block (821) is pressed against the upper support surface (811).

9. The portal crane track beam structure for a subway shield excavation hole according to claim 8, characterized in that: The second fixing mechanism (9) includes a pair of second pressure plates (91), which are fixed to the bottom beam (3) by second fasteners (92) and pressed against the bottom sides of the track (4) respectively.

10. The portal gantry track beam structure for a subway shield excavation portal according to any one of claims 1 to 6, characterized in that: A temporary support (311) is provided inside the through hole (31).

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