Pile casing lowering device for ultra-deep cast-in-situ bored pile

Abstract

A pile casing lowering device for an ultra-deep cast-in-situ bored pile is characterized in that a pile casing is a splicable casing body and comprises a rack, an upper clamping device, a lower clamping device and a lowering mechanism, and the upper clamping device, the lower clamping device and the lowering mechanism are arranged on the rack; the upper clamping device and the lower clamping device are used for clamping an upper pile casing and a lower pile casing to be spliced, and the distance between the upper clamping device and the lower clamping device is smaller than the length of the pile casing. A hanging ring is arranged at the side bottom of the pile casing; the lowering mechanism comprises a lifting rope, a reel, a rope binding head arranged on the rack and a motor, the reel is connected to an output shaft of the motor, one end of the lifting rope is wound around the reel, and the other end of the lifting rope is used for penetrating through a lifting ring on the pile casing corresponding to the bottom layer position and is connected to the rope binding head. The pile casing splicing device allows pile casing splicing work to be carried out on the pile casing splicing device, so that the pile casing can be hoisted to equipment by using small hoisting equipment, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to a casing lowering device for ultra - deep bored cast - in - place piles, belonging to the technical field of cast - in - place pile construction. Background Art

[0002] When pouring cast - in - place piles, it is often necessary to install a casing in the cast - in - place pile hole to reinforce the hole wall and enhance the stability of the hole wall.

[0003] A device for preventing hole wall collapse of a large - diameter rotary bored cast - in - place pile with the authorization announcement number of CN 220927886 U includes a support plate. Four support legs are arranged at the bottom of the support plate. Universal wheels are arranged at the bottom ends of the four support legs. Stabilizing mechanisms are arranged on the outer sides of the four support legs. A rectangular hole is formed in the support plate. A plurality of anti - collapse pipes are arranged in the rectangular hole. The plurality of anti - collapse pipes are spliced with each other. Pushing mechanisms are arranged on the inner walls of both sides of the rectangular hole. Conveying mechanisms are arranged on the two pushing mechanisms. The conveying mechanisms are adapted to the anti - collapse pipes. The spliced anti - collapse pipes can be conveyed up and down, so that the anti - collapse pipes enter the pouring hole to support the hole wall and play a role in preventing collapse.

[0004] However, when encountering ultra - deep drilling, such as 10 m, large equipment needs to be configured to load the spliced anti - collapse pipes into the rectangular hole and then be pressed and conveyed by the conveying mechanism. The use of large equipment results in high construction costs. Moreover, large equipment is extremely vulnerable to the limitation of the construction site space. If the construction site space is relatively narrow, large equipment may not be applicable. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the present application provides a casing lowering device for ultra - deep bored cast - in - place piles, which allows casing splicing work to be carried out on it. Therefore, it is possible to use a small hoisting device to hoist the casing onto the device, reducing the construction cost.

[0006] A casing lowering device for ultra - deep bored cast - in - place piles, the casing is a splicable cylinder, including a frame, an upper clamping device, a lower clamping device and a lowering mechanism arranged on the frame;

[0007] The upper clamping device and the lower clamping device are respectively used for clamping the upper and lower casings to be spliced with each other, and the distance between the two is less than the length of the casing; the upper clamping device includes two clamping blocks one arranged opposite to each other and sliding - restricted on the frame, and electric push rods one respectively connected to the two clamping blocks one; the lower clamping device includes two clamping blocks two arranged opposite to each other and sliding - restricted on the frame, and electric push rods two respectively connected to the two clamping blocks two;

[0008] A plurality of the lowering mechanisms are arranged between the two clamping blocks one; a lifting ring is arranged at the bottom of the side of the casing;

[0009] The lowering mechanism includes a suspension rope, a reel, a rope tying head and a motor arranged on the frame. The reel is connected to the output shaft of the motor. One end of the suspension rope is wound around the reel, and the other end is used to pass through the suspension ring on the casing corresponding to the bottom layer position and is connected to the rope tying head.

[0010] Preferably, the frame includes an upper beam frame and a lower beam frame;

[0011] The upper beam frame includes two parallel cross beams I, and the two cross beams I are connected by a longitudinal beam I. Both sides of the clamping block I are slidably connected to the two cross beams I respectively;

[0012] The lower beam frame includes two parallel cross beams II, and the two cross beams II are connected by a longitudinal beam II. Both sides of the clamping block II are slidably connected to the two cross beams II respectively.

[0013] Preferably, a rolling support mechanism for supporting the reel is installed on the cross beam I. The rolling support mechanism includes a support roller and a roller frame for installing the support roller; the support roller supports one end of the reel far from the motor, and the shaft section of the reel between the motor and the support roller is used for winding the suspension rope.

[0014] Preferably, the clamping block I and the clamping block II respectively have an arc-shaped clamping groove I and an arc-shaped clamping groove II for clamping the casing.

[0015] Preferably, anti-slip layers are provided on the groove walls of the arc-shaped clamping groove I and the arc-shaped clamping groove II.

[0016] Preferably, there are 4 lowering mechanisms, which are arranged in a rectangle on the two cross beams I.

[0017] Preferably, the upper beam frame and the lower beam frame are connected by a plurality of lift-adjustable columns.

[0018] Preferably, the lift-adjustable column specifically includes a sleeve body and an adjusting body inserted into the sleeve body. A plurality of vertically arranged adjusting connection holes are provided on the adjusting body, and a plurality of fasteners corresponding to passing through part of the adjusting connection holes are provided on the sleeve body.

[0019] Preferably, four support legs are provided at the bottom of the frame, and a stabilizing mechanism is provided on the outer sides of the four support legs. The stabilizing mechanism includes a stabilizing block, the stabilizing block is fixedly installed on the outer side of the support leg, a threaded rod is threadedly connected to the stabilizing block, a handle is installed at the top of the threaded rod, a support block is installed at the bottom of the threaded rod, and an anti-slip pad is provided at the bottom of the support block. In summary, the utility model has the following beneficial effects:

[0020] 1. The casing lowering device in the present utility model allows casing splicing work to be carried out thereon. Therefore, it is possible to hoist the casing onto the device using a small hoisting equipment, reducing the construction cost.

[0021] 2. In the casing lowering device of the present utility model, a rolling support mechanism for supporting the reel is installed on the first cross beam to prevent the reel from bending and deforming. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the casing lowering device when two casings are installed;

[0023] Figure 2 It is a schematic simplified diagram of the structure of the upper beam frame;

[0024] Figure 3 For Figure 2 The enlarged view at position A in

[0025] Figure 4 It is a schematic simplified diagram of the structure of the lower beam frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present utility model will be further described below in conjunction with the drawings through specific embodiments.

[0027] Embodiment: Refer to Figures 1-4 As shown, a casing lowering device for a super-deep bored cast-in-place pile, wherein the casing is a splicable cylinder, and connecting blocks 01 for splicing connection are provided at the upper edge and the lower edge of the casing. Fastening connection holes for splicing connection can be opened on the connecting blocks 01; a lifting ring 02 is provided at the bottom of the side of the casing;

[0028] The casing lowering device includes a frame 1, an upper clamping device 2, a lower clamping device 3 and a rope hoisting device 4 provided on the frame 1;

[0029] The upper clamping device 2 and the lower clamping device 3 are respectively used to clamp the upper and lower casings to be spliced with each other. The distance between the upper clamping device 2 and the lower clamping device 3 is less than the length of the casing, ensuring that the two clamped casings can be spliced;

[0030] The upper clamping device 2 includes two relatively arranged clamping blocks 21 and electric push rods 22 respectively connected to the two clamping blocks 21. The electric push rods 22 can be powered by electric cylinders. The two clamping blocks 21 are slidably restricted on the frame 1, that is, the clamping blocks 21 have only one degree of freedom in the sliding direction. When the two clamping blocks 21 cooperate to clamp the casing, the weight of the casing is jointly borne by the frame 1 and the clamping blocks 21 to prevent the electric push rods 22 from bending and deforming;

[0031] The lower clamping device 3 includes two relatively arranged second clamping blocks 31 and electric push rods two 32 respectively connected to the two second clamping blocks 31. The electric push rods two 32 can be powered by electric cylinders. The two second clamping blocks 31 are slidably restricted on the frame 1, that is, the second clamping blocks 31 have only one degree of freedom in the sliding direction. When the two second clamping blocks 31 cooperate to clamp the casing, the weight of the casing is jointly borne by the frame 1 and the second clamping blocks 31 to prevent the electric push rods two 32 from bending and deforming;

[0032] A plurality of the lowering mechanisms 4 are arranged between the two first clamping blocks 21. The lowering mechanism 4 specifically includes a lifting rope 41, a reel 42, a rope tying head 43 and a motor 44 arranged on the frame 1. Among them, the rope tying head 43 is connected to the frame 1 through a rope head seat 43-1, the motor 44 is directly installed on the frame 1, the reel 42 is connected to the output shaft of the motor 44 and is controlled by the motor 44 to rotate. One end of the lifting rope 41 is wound around the reel 42, and the other end is used to pass through the lifting ring 02 on the casing corresponding to the bottom layer position and is connected to the rope tying head 43.

[0033] The working principle of this casing lowering device: Workers use a small crane device to lift the first casing between the two second clamping blocks 31 of the lower clamping device 3, start the second electric push rod 32 to make the two second clamping blocks 31 clamp the casing. Then, still using this crane device, lift the second casing between the two first clamping blocks 21 of the upper clamping device 2 and ensure that the lower surface of the second casing is in contact with the upper surface of the first casing. Start the first electric push rod 22 to make the two first clamping blocks 21 clamp the casing. Then, use fastening bolts to splice the two casings together to form a casing assembly. Then, pass the lifting rope 41 through the lifting ring 02 on the casing corresponding to the bottom layer position and connect it to the tying rope head 43. Loosen the lower clamping device 3 and the upper clamping device 2. At this time, the weight of the casing assembly is borne by the lifting rope 41. Then, start the motor 44 to release the lifting rope 41, and the casing assembly slowly descends. When the casing assembly descends to a position slightly higher than the lower clamping device 3, stop the operation of the motor 44. Start the second electric push rod 32 again to make the two second clamping blocks 31 clamp the casing assembly. At this time, a third casing can be added. Regarding the third casing, perform the above actions. Use a small crane device to lift the third casing between the two first clamping blocks 21 of the upper clamping device 2 and ensure that the third casing is in contact with the upper surface of the casing assembly. Start the first electric push rod 22 to make the two first clamping blocks 21 clamp the third casing. Then, splice this casing with the lower casing assembly to form a new casing assembly. Loosen the lower clamping device 3 and the upper clamping device 2, start the motor 44, release the lifting rope 41, and the casing assembly slowly descends. When the casing assembly descends to a position slightly higher than the lower clamping device 3, stop the operation of the motor 44. The second electric push rod 32 acts to make the two second clamping blocks 31 clamp the casing assembly. Repeat the above actions to complete the assembly of the 4th, 5th... Nth casings and the lowering of the assembled casing assembly until the casing assembly reaches the bottom of the cast-in-place pile hole.

[0034] The entire casing lowering device allows casing splicing work to be carried out on it. Therefore, it is possible to use a small hoisting device to hoist the casing onto the device, reducing the construction cost.

[0035] The frame 1 specifically includes an upper beam frame 11 and a lower beam frame 12.

[0036] The upper beam frame 11 includes two parallel cross beams 111. The two cross beams 111 are connected by a longitudinal beam 112. The two sides of the first clamping block 21 are respectively slidably connected to the two cross beams 111 to limit the two-side sliding of the first clamping block 21. Regarding the specific implementation of the sliding limit, card slots 21-1 are respectively arranged at the two side ends of the first clamping block 21, and the cross beam 111 has a guiding part 111-1 that cooperates with the card slot 21-1.

[0037] The lower beam frame 12 includes two parallel cross beams II 121, and the two cross beams II 121 are connected by a longitudinal beam II 122. Both sides of the clamping block II 31 are slidably connected to the two cross beams II 121 respectively, realizing sliding restrictions on both sides of the clamping block II 31. Regarding the specific implementation of the sliding restrictions, clamping grooves II 31-1 are respectively arranged at both ends of the clamping block II 31, and the cross beam II 121 has a guiding part II 121-1 that cooperates with the clamping groove II 31-1.

[0038] When the casing moves downward, the upper clamping device 2 and the lower clamping device 3 are in a released state. The reel 42 is the core load-bearing component. In order to prevent the reel 42 from bending and deforming, a rolling support mechanism 14 for supporting the reel 42 is installed on the cross beam I 111. The rolling support mechanism 14 includes a support roller 141 and a roller frame 142 for installing the support roller 141. The support roller 141 supports one end of the reel 42 away from the motor 44, and the shaft section of the reel 42 located between the motor 44 and the support roller 141 is used to wind the lifting rope 41. The roller frame 142 is composed of profile parts such as blocks and plates, so the structure is simple and the manufacturing is convenient. Specifically, as described in the attached Figure 3 As shown in the figure, the roller frame 142 includes two side vertical plates 1421 and a bottom plate 1422 located below the two side vertical plates 1421 and connected to the two side vertical plates 1421. The bottom plate 1422 is connected to the cross beam I 111, and a reinforcing plate can be arranged below the bottom plate for reinforcement.

[0039] In this embodiment, the clamping block I 21 and the clamping block II 31 respectively have an arc-shaped clamping groove I 21-2 and an arc-shaped clamping groove II 31-2 for clamping the casing. The arc-shaped clamping groove I 21-2 and the arc-shaped clamping groove II 31-2 match the shape of the casing. Anti-slip layers are arranged on the groove walls of the arc-shaped clamping groove I 21-2 and the arc-shaped clamping groove II 31-2 to clamp the casing more stably. The anti-slip layers are not shown in the figure.

[0040] In this embodiment, there are 4 lowering mechanisms 4, which are arranged in a rectangle on the two cross beams I 111 to lower the casing smoothly.

[0041] In this embodiment, the upper beam frame 11 and the lower beam frame 12 are connected by a plurality of lift-adjustable columns 13, so that the distance between the upper beam frame 11 and the lower beam frame 12 is adjustable, which is suitable for splicing casings of different lengths. The lift-adjustable column 13 specifically includes a sleeve body 131 and an adjusting body 132 inserted into the sleeve body 131. The lower end of the sleeve body 131 is connected to the lower beam frame 12, the upper end of the adjusting body 132 is connected to the upper beam frame 11, a plurality of vertically arranged adjusting connection holes 133 are arranged on the adjusting body 132, and a plurality of fasteners 134 corresponding to passing through part of the adjusting connection holes 133 are arranged on the sleeve body 131. The fastener 134 is a bolt fastener 134, and the sleeve body 131 is provided with a fastening hole for the fastener 134 to pass through.

[0042] Four support legs 15 are provided at the bottom of the frame 1, and a stabilizing mechanism 16 is provided on the outer side of each of the four support legs 15. The stabilizing mechanism 16 includes a stabilizing block 161 which is fixedly installed on the outer side of the support leg 15. A threaded rod 162 is threadedly connected to the stabilizing block 161. A handle 163 is installed at the top end of the threaded rod 162, and a support block 164 is installed at the bottom end of the threaded rod 162. An anti-slip pad is provided at the bottom of the support block 164.

[0043] The above embodiments only describe the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various variations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope of the present invention. The technical content claimed by the present invention has been fully recorded in the claims.

Claims

1. A casing lowering device for a super-deep bored cast-in-place pile, the casing being a splicable cylinder, characterized in that, It includes a frame (1), an upper clamping device (2), a lower clamping device (3) and a lowering mechanism (4) arranged on the frame (1); The upper clamping device (2) and the lower clamping device (3) are respectively used for clamping the upper and lower casing pipes to be spliced with each other, and the distance between the upper clamping device (2) and the lower clamping device (3) is less than the length of the casing pipe; the upper clamping device (2) includes two first clamping blocks (21) arranged oppositely and slidingly restricted on the frame (1) and electric push rods one (22) respectively connected to the two first clamping blocks (21), and the lower clamping device (3) includes two second clamping blocks (31) arranged oppositely and slidingly restricted on the frame (1) and electric push rods two (32) respectively connected to the two second clamping blocks (31); A plurality of the lowering mechanisms (4) are arranged between the two first clamping blocks (21); a lifting ring (02) is arranged at the bottom of the side of the casing pipe; The lowering mechanism (4) includes a lifting rope (41), a reel (42), a rope tying head (43) arranged on the frame (1) and a motor (44), the reel (42) is connected to the output shaft of the motor (44), one end of the lifting rope (41) is wound on the reel (42), and the other end is used for passing through the lifting ring (02) on the casing pipe corresponding to the bottom layer position and connecting to the rope tying head (43).

2. The casing lowering device for a super-deep bored cast-in-place pile according to claim 1, wherein, The frame (1) includes an upper beam frame (11) and a lower beam frame (12); The upper beam frame (11) includes two parallel cross beams one (111), the two cross beams one (111) are connected by a longitudinal beam one (112), and both sides of the first clamping block (21) are slidably connected to the two cross beams one (111); The lower beam frame (12) includes two parallel cross beams two (121), the two cross beams two (121) are connected by a longitudinal beam two (122), and both sides of the second clamping block (31) are slidably connected to the two cross beams two (121).

3. The casing lowering device for a super-deep bored cast-in-place pile according to claim 2, characterized in that, A rolling support mechanism (14) for supporting the reel (42) is installed on the cross beam one (111), and the rolling support mechanism (14) includes a support roller (141) and a roller frame (142) for installing the support roller (141); the support roller (141) supports one end of the reel (42) far from the motor (44), and the shaft section of the reel (42) between the motor (44) and the support roller (141) is used for winding the lifting rope (41).

4. The casing lowering device for a super-deep bored cast-in-place pile according to claim 1, characterized in that The first clamping block (21) and the second clamping block (31) respectively have an arc-shaped clamping groove one (21-2) and an arc-shaped clamping groove two (31-2) for clamping the casing pipe.

5. The casing lowering device for a super-deep bored cast-in-place pile according to claim 4, characterized in that, Anti-slip layers are arranged on the groove walls of the arc-shaped clamping groove one (21-2) and the arc-shaped clamping groove two (31-2).

6. The casing lowering device for a super-deep bored cast-in-place pile according to claim 2, wherein, There are 4 of the lowering mechanisms (4), which are arranged in a rectangular shape on the two cross beams one (111).

7. The casing lowering device for a super-deep bored cast-in-place pile according to claim 2, characterized in that, The upper beam frame (11) and the lower beam frame (12) are connected by a plurality of lift-adjustable columns (13).

8. The casing lowering device for a super-deep bored cast-in-place pile according to claim 7, characterized in that, The lift-adjustable column (13) specifically includes a sleeve body (131) and an adjustment body (132) inserted into the sleeve body (131). A plurality of vertically arranged adjustment connection holes (133) are provided on the adjustment body (132), and a plurality of fasteners (134) corresponding to passing through some of the adjustment connection holes (133) are provided on the sleeve body (131).

9. The casing lowering device for a super-deep bored cast-in-place pile according to claim 1, characterized in that, Four support legs (15) are provided at the bottom of the frame (1), and a stabilizing mechanism (16) is provided on the outer side of each of the four support legs (15). The stabilizing mechanism (16) includes a stabilizing block (161) fixedly installed on the outer side of the support leg (15). A threaded rod (162) is threadedly connected to the stabilizing block (161). A handle (163) is installed at the top of the threaded rod (162), and a support block (164) is installed at the bottom of the threaded rod (162). An anti-slip pad is provided at the bottom of the support block (164).

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