Dismounting device for temporary steel pipe column on lower portion of half-cover-excavation station cover plate

Abstract

The utility model discloses a device for dismantling a temporary steel pipe column at the lower part of a cover plate of a half-cover excavation station, which comprises an upper lifting lug arranged on a top plate or a middle plate at the top of the steel pipe column, the upper lifting lug is connected with a first U-shaped clamping ring, and the first U-shaped clamping ring is connected with a steel wire rope extending out of the steel pipe column; the bottom end of the steel wire rope is connected with an electric hoist; a coir rope is connected between the fixed pulley and an upper lifting hook of the electric hoist; the upper 1 / 3 height position of the steel pipe column is connected with a lower lifting hook of the electric hoist. The utility model has the advantages of simple structure, convenience in use, high safety and convenience in controlling the laying direction.

Description

Technical Field

[0001] The utility model relates to the technical field of subway station construction, and more specifically to a device for removing temporary steel pipe columns under the cover plate of a semi-top-down station. Background Art

[0002] With the rapid development of urban rail transit, more and more subway stations are constructed by the semi-top-down method. Generally, a semi-top-down station adopts a temporary cover plate and temporary steel pipe columns are used for support at the lower part. After the construction of the station is completed, the cover plate is removed first, and then the temporary steel pipe columns are cut and hoisted out.

[0003] However, in some cases, shield construction is carried out immediately after the completion of the station, and the temporary cover plate cannot be removed before the shield tunneling is completed. In this case, the removal of the temporary steel pipe columns becomes a difficult problem. Due to the existence of the cover plate, the steel pipe columns cannot be directly cut into sections and hoisted out from the top; the thickness of the middle plate is relatively thin and cannot bear the loads of cranes, excavators, etc., so these machines cannot be used to hoist and place the steel pipe columns. The steel pipe columns cannot be directly pushed down by machines after being cut. Even if a large amount of shock-absorbing and buffering materials (such as rubber tires, etc.) are laid on the middle plate, the impact force caused by their toppling may still affect the project quality, and the toppling direction of the steel pipe columns is not easy to control, and safety accidents are likely to occur.

[0004] Therefore, there is an urgent need for a device for removing temporary steel pipe columns under the cover plate of a semi-top-down station. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a device for removing temporary steel pipe columns under the cover plate of a semi-top-down station to solve the problems in the background art.

[0006] To solve the above technical problems, the following technical solutions are adopted in the utility model.

[0007] A device for removing temporary steel pipe columns under the cover plate of a semi-top-down station includes an upper lifting ear arranged on the top plate or middle plate of the steel pipe column. A first U-shaped snap ring is connected to the upper lifting ear, and a steel wire rope extending out of the steel pipe column is connected to the first U-shaped snap ring; the bottom end of the steel wire rope is connected to an electric hoist. The electric hoist includes an upper hook and a lower hook, and the upper hook of the electric hoist is connected to the steel wire rope; a fixed pulley is arranged at the top of the steel pipe column, and a brown rope is connected between the fixed pulley and the upper hook of the electric hoist; the upper 1 / 3 height position of the steel pipe column is connected to the lower hook of the electric hoist.

[0008] Further optimizing the technical solution, the steel wire rope is a double rope.

[0009] Further optimizing the technical solution, both the upper lifting ear and the lower lifting ear are steel plates.

[0010] Further optimize the technical solution. A lower lifting lug is welded at the upper 1 / 3 height position of the steel pipe column, and a second U-shaped snap ring is connected to the lower lifting lug. The second U-shaped snap ring is connected to the lower hook of the electric hoist.

[0011] Further optimize the technical solution. A 75×100 mm square hole for hanging a fixed pulley is cut at the top of the steel pipe column.

[0012] Due to the adoption of the above technical solutions, the technical progress achieved by the present utility model is as follows.

[0013] A device for removing a temporary steel pipe column under the cover plate of a semi-top-down station provided by the present utility model installs an upper lifting lug, a first U-shaped snap ring, and a steel wire rope on the upper floor slab or middle floor slab of the steel pipe column to be removed as lifting points, uses a fixed pulley hung on the outer wall of the steel pipe column to lift the electric hoist, and manually hangs the upper hook of the electric hoist on the steel wire rope, then hangs the lower hook of the electric hoist at the upper 1 / 3 height position of the steel pipe column and tightens it. After cutting the steel pipe column, use the electric hoist to slowly lay it down to the slab surface, ensuring the safe removal of the temporary steel pipe column in the semi-top-down subway station without removing the cover. The present utility model has the advantages of simple structure, convenient use, high safety, and convenient control of the laying-down direction. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is a structural schematic diagram of the present utility model during use;

[0016] Wherein: 1, upper lifting lug; 2, first U-shaped snap ring; 3, steel wire rope; 4, fixed pulley; 5, electric hoist; 51, upper hook; 52, lower hook; 6, brown rope; 7, steel pipe column; 8, lower lifting lug; 9, second U-shaped snap ring. Specific Embodiments

[0017] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0018] A device for removing a temporary steel pipe column under the cover plate of a semi-top-down station, in combination with Figures 1 to 2 as shown, includes an upper lifting lug 1, a first U-shaped snap ring 2, a steel wire rope 3, a fixed pulley 4, an electric hoist 5, a brown rope 6, a steel pipe column 7, a lower lifting lug 8, and a second U-shaped snap ring 9. The electric hoist 5 includes an upper hook 51 and a lower hook 52.

[0019] The upper lifting lug 1 is a steel plate with dimensions of 150×200×10 mm. The upper lifting lug 1 is welded to the top plate or middle plate of the steel pipe column 7. A first U-shaped snap ring 2 is connected to the upper lifting lug 1, and the diameter of the first U-shaped snap ring 2 is 20 mm. A steel wire rope 3 extending out of the steel pipe column 7 is connected to the first U-shaped snap ring 2. The steel wire rope 3 has a diameter of 26 mm and a length of 2000 mm, and the steel wire rope 3 is a double rope. If a reserved hole is provided at the intersection of the steel pipe column 7 and the cover plate, the steel wire rope 3 directly passes through the cover plate from the reserved hole; if there is no reserved hole, a hole can be cut in the steel pipe column 7, and the steel wire rope 3 passes through the cover plate from inside the steel pipe column 7.

[0020] The bottom end of the steel wire rope 3 is connected to an electric hoist 5. The electric hoist 5 includes an upper hook 51 and a lower hook 52, and the upper hook 51 of the electric hoist 5 is connected to the steel wire rope 3.

[0021] A 75×100 mm square hole is cut at the top of the steel pipe column 7 for hanging a fixed pulley 4. A brown rope 6 is connected between the fixed pulley 4 and the upper hook 51 of the electric hoist 5.

[0022] A lower lifting lug 8 is welded at the upper 1 / 3 height position of the steel pipe column 7. The lower lifting lug 8 is a steel plate, and a second U-shaped snap ring 9 is connected to the lower lifting lug 8. The second U-shaped snap ring 9 is connected to the lower hook 52 of the electric hoist 5.

[0023] When the present utility model is actually used, a 150×200×10 mm steel plate is welded on the upper top plate or middle plate of the steel pipe column 7 to be demolished as the upper lifting lug 1. A first U-shaped snap ring 2 with a diameter of 20 mm is welded on the upper lifting lug 1, and a steel wire rope 3 with a diameter of 26 mm and a length of 2000 mm is installed on the first U-shaped snap ring 2 of the lifting lug as a lifting point.

[0024] When a reserved hole is provided at the intersection of the steel pipe column 7 and the plate, the steel wire rope 3 directly passes downward through the cover plate from the hole; when there is no reserved hole, a hole is cut in the steel pipe column 7, the steel wire rope 3 passes downward through the cover plate from inside the steel pipe column 7, and a hole is opened at the lower part to extend the steel wire rope 3 out of the steel pipe column 7.

[0025] A 75×100 mm square hole is cut at a position below the upper cutting surface of the steel pipe column. A fixed pulley 4 is hung in the square hole, and a brown rope 6 is threaded between the fixed pulley 4 and the upper hook 51 of the electric hoist 5.

[0026] A lower lifting lug 8 is welded at the upper 1 / 3 height position of the steel pipe column 7, and a second U-shaped snap ring 9 is connected to the lower lifting lug 8. The 10t electric hoist 5 is lifted from the ground to a position close to the steel wire rope 3 through the fixed pulley 4, and then the lower hook 52 of the electric hoist 5 is hung on the second U-shaped snap ring 9, and the upper hook 51 of the electric hoist 5 is connected to the steel wire rope 3 and tightened.

[0027] When cutting the steel pipe column, the upper cutting surface is located at the top of the steel pipe column and is flush with the bottom of the slab; the lower cutting surface is located at the bottom of the steel pipe column and forms an angle of 0° to 45° with the horizontal plane. After cutting, first use a crowbar to pry and remove the circular part of the inclined surface of the corner, so that the bottom of the steel pipe column 7 is suspended. Then start the electric hoist, slowly lay down the steel pipe column 7 on the middle plate (or bottom plate), and finally use a small forklift to transfer the steel pipe column 7 to the lifting outlet and lift it out of the station, realizing the safe removal of the temporary steel pipe column 7 under the cover plate.

Claims

1. A device for removing temporary steel pipe columns at the bottom of a half-covered station cover, characterized in that: The utility model comprises an upper lifting lug (1) arranged on the top plate or the middle plate of the top of the steel pipe column (7), the upper lifting lug (1) is connected to a first U-shaped clamping ring (2), and the first U-shaped clamping ring (2) is connected to a steel wire rope (3) extending out of the steel pipe column (7); the bottom end of the steel wire rope (3) is connected to an electric hoist (5), the electric hoist (5) comprises an upper hook (51) and a lower hook (52), and the upper hook (51) of the electric hoist (5) is connected to the steel wire rope (3); a fixed pulley (4) is arranged on the top of the steel pipe column (7), and a brown rope (6) is connected between the fixed pulley (4) and the upper hook (51) of the electric hoist (5); and the upper 1 / 3 height position of the steel pipe column (7) is connected to the lower hook (52) of the electric hoist (5).

2. The device for removing temporary steel pipe columns at the bottom of the cover plate of a semi-covered station according to claim 1 is characterized in that: The steel wire rope (3) is a double rope.

3. The device for removing temporary steel pipe columns at the bottom of the cover plate of a semi-covered station according to claim 1 is characterized in that: The upper lifting lug (1) and the lower lifting lug (8) are both made of steel plates.

4. The device for removing temporary steel pipe columns at the bottom of the cover plate of a semi-excavated station according to claim 3 is characterized in that: A lower lifting lug (8) is welded at the upper 1 / 3 height position of the steel pipe column (7), a second U-shaped clamping ring (9) is connected to the lower lifting lug (8), and the second U-shaped clamping ring (9) is connected to the lower lifting hook (52) of the electric hoist (5).

5. The device for removing temporary steel pipe columns at the bottom of the cover plate of a semi-covered station according to claim 1 is characterized in that: A 75×100 mm square hole is cut at the top of the steel pipe column (7) for hanging the fixed pulley (4).

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