Cast-in-situ bored pile sediment device

Abstract

The utility model relates to a cast-in-situ bored pile sediment device which is mainly applied to the field of building construction, in particular to a cast-in-situ bored pile construction process. The innovative structure comprises a slag removal cylinder and an air guide device. Cutting teeth are specially designed on the bottom wall of the slag removal cylinder, so that the rock can be effectively drilled; a rotating disc capable of freely rotating is further arranged in the slag removal barrel and mainly used for blocking a rock core after drilling operation is completed, the other important part, namely the air guide device, is composed of a fixing disc and a breather pipe, and the cooperation of the fixing disc and the breather pipe can remarkably reduce mud resistance and optimize the construction process in the drill lifting process. The carefully-designed assemblies act together to remarkably improve the construction efficiency of the cast-in-situ bored pile, meanwhile, the construction quality is improved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The present application relates to the field of building construction, and in particular, to a device for removing sediment in bored cast-in-place piles. Background Art

[0002] A bored cast-in-place pile refers to a pile formed by means of mechanical drilling, steel pipe soil extrusion, or manual excavation at the construction site in the foundation soil, and a steel reinforcement cage is placed therein and concrete is poured. It has the characteristics of strong adaptability, low cost, and simple construction in the design and application of pile foundations.

[0003] According to the formation conditions and the buried depth of the groundwater level, the conventional mud slurry support hole-forming process is generally adopted for drilling the pile hole. Before the end of pile formation and before the concrete pouring, a certain thickness of sediment often forms at the bottom of the pile. Especially for extra-long bored cast-in-place piles, due to the characteristics of long hole-forming time and large concrete pouring volume, the construction equipment, technology, and process level are more restricted, and the hole cleaning is difficult, and the sediment at the bottom of the pile is not easy to clean, which is likely to cause phenomena such as hole collapse, making it more difficult to effectively control the thickness of the sediment at the bottom of the extra-long pile, resulting in too thick sediment at the bottom of the pile. The too thick sediment will affect the bearing capacity of the pile and thus affect the construction quality of the cast-in-place pile.

[0004] Currently, in pile foundation engineering, the method of mud slurry support + rotary drilling rig hole-forming is mostly used for constructing engineering piles. The same is true for the construction of engineering piles that need to embed rock in the lower part of the pile body. For example, if the upper part of the bored cast-in-place pile under construction is soil layer and the lower part is hard rock, generally, mud slurry is prepared for hole wall support during drilling, and then a rotary drilling rig is used to install a roller bit barrel drill to grind and core drill in the rock for hole formation.

[0005] Currently, the drill bit of the rotary drilling rig uses a small-diameter roller bit to core drill, and a large-diameter roller bit is used to break the peripheral core and expand the hole for drilling. After drilling, the core is blocked in the inner pipe and taken out of the hole. When the drill bit is lifted upward, the crushed slag on the side wall of the cast-in-place pile will fall off, and the crushed slag will directly fall on the bottom surface of the cast-in-place pile that has been cleaned. The crushed slag after the external roller bit drilling cannot be completely cleaned. If the roller bit outside the barrel wall is removed, when the drill bit is lifted upward, due to the reason of the mud slurry, the resistance will be relatively large and it will be difficult to take out, reducing the drilling efficiency. Summary of the Utility Model

[0006] In order to improve the efficiency of bored cast-in-place piles, the present application provides a device for removing sediment in bored cast-in-place piles.

[0007] A device for removing sediment in bored cast-in-place piles provided by the present application adopts the following technical solutions:

[0008] A device for removing sediment in bored cast-in-place piles includes:

[0009] Sludge removal cylinder, the bottom wall of the sludge removal cylinder is provided with cutting teeth, the cutting teeth are arranged in a strip shape starting from the center of the sludge removal cylinder and radiating at the bottom of the sludge removal cylinder, a first opening is formed on the bottom wall of the sludge removal cylinder at the side of the cutting teeth, a rotating disk for supporting the core is installed at the lower end of the inner tube of the sludge removal cylinder, the first rotating disk rotates around the axis of the sludge removal cylinder, and a second opening equal to the opening is provided, and the rotating disk is in a horizontal position by its own weight to block the core inside the inner tube;

[0010] Gas guiding device, the gas guiding device includes a fixed disk and a ventilation pipe, the fixed disk is fixedly arranged inside the sludge removal cylinder, the bottom surface abuts against the top surface of the rotating disk, and a third opening equal to the first opening is formed, the fixed disk is provided with a first ventilation hole at a position offset from the third opening, one end of the ventilation pipe is fixedly connected to the fixed disk and communicated with the first ventilation hole, the other end is communicated with the top wall of the sludge removal cylinder, the rotating disk is provided with a second ventilation hole equal in size to the first ventilation hole, the bottom wall of the sludge removal cylinder is provided with a third ventilation hole equal to and coaxial with the first ventilation hole, when the rotating disk rotates to the second opening is inside the bottom wall of the sludge removal cylinder, the second ventilation hole is communicated with the first ventilation hole, the third ventilation hole and the air duct.

[0011] By adopting the above technical solutions, due to the fluid-plastic characteristics of the sludge, air suction is likely to occur during the drill pipe lifting process, and air suction will lead to consequences such as sludge diameter reduction and hole collapse. When drilling through the sludge removal cylinder, the cutting teeth provided on the bottom wall of the sludge removal cylinder are used to drill the rock. At this time, the second opening on the rotating disk is communicated with the first opening on the bottom wall of the sludge removal cylinder and the third opening on the fixed disk, and the sediment during drilling can be stored inside the sludge removal cylinder. After drilling, the rotating disk is in a horizontal position by its own weight to block the core inside the sludge removal cylinder. At this time, the second ventilation hole is communicated with the ventilation pipe and the first and third ventilation holes, and the formed channel can increase the mud flow during lifting, reduce the mud resistance during lifting, and improve the efficiency of bored cast-in-place piles.

[0012] Preferably, the cutting teeth are made of hard alloy material, and their shape is strip-shaped, extending along the radial direction of the bottom wall of the sludge removal cylinder, and there is a spacing between each cutting tooth.

[0013] By adopting the above technical solutions, the cutting teeth are arranged as multiple teeth with a spacing and are made of hard alloy material, which is convenient for effectively cutting the rock and improving the service life of the cutting teeth.

[0014] Preferably, the first opening, the second opening and the third opening are all designed in an arc shape.

[0015] By adopting the above technical solutions, the first opening, the second opening and the third opening are all designed in an arc shape, which coincides with the natural discharge path of the crushed stones, so as to more effectively discharge the crushed stones and improve the sludge removal effect.

[0016] Preferably, a limiting block is provided on one side of the fixed disk in contact with the rotating disk, and a limiting groove for the movement of the limiting block is provided on the upper surface of the rotating disk. When the limiting block is located at the first end of the limiting groove, the positions of the first opening, the second opening, and the third opening are the same. When the limiting block is located at the second end of the limiting groove, the second ventilation hole is communicated with the ventilation pipe and the first and third ventilation holes.

[0017] By adopting the above technical solution, the relative position between the fixed disk and the rotating disk can be accurately controlled by the movement of the limiting block in the limiting groove. When the limiting block is located at the first end of the limiting groove, the positions of the first, second, and third openings are the same, which is convenient for discharging the sediment generated during drilling into the slag cleaning cylinder. When the limiting block is located at the second end of the limiting groove, the second ventilation hole is communicated with the ventilation pipe and the first and third ventilation holes, which is convenient for the mud to pass through the through hole, improving the rising efficiency of the slag cleaning cylinder and the efficiency of bored cast-in-place piles.

[0018] Preferably, the rotating disk is connected to the inner pipe of the slag cleaning cylinder through a bearing, and seals are provided on both sides of the bearing.

[0019] By adopting the above technical solution, the rotating disk is connected to the inner pipe of the slag cleaning cylinder through a bearing, which is convenient for the rotating disk to rotate stably. At the same time, seals are provided on both sides of the bearing to prevent mud from leaking into the bearing, ensuring the stability and service life of the device.

[0020] Preferably, an integrated counterweight is provided on the rotating disk.

[0021] By adopting the above technical solution, an integrated counterweight is provided on the rotating disk to increase the weight of the rotating disk, ensuring that the rotating disk is in a horizontal position by its own weight in the natural state, thereby effectively sealing the core in the inner pipe of the slag cleaning cylinder.

[0022] Preferably, the counterweight is provided at the edge of the rotating disk.

[0023] By adopting the above technical solution, setting the counterweight at the edge of the rotating disk can effectively utilize the centrifugal force to help maintain the balance of the rotating disk.

[0024] Preferably, a layer of wear-resistant material is coated on the inner wall of the slag cleaning cylinder.

[0025] By adopting the above technical solution, when the slag cleaning cylinder drills the rock, the broken rock will enter the inside of the slag cleaning cylinder. A layer of wear-resistant material is coated on the inner wall of the slag cleaning cylinder to reduce the wear of the inner wall of the slag cleaning cylinder by the crushed stone during the drilling process and extend the service life of the slag cleaning cylinder.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Due to the fluid-plastic characteristics of the silt, it is easy to have a suction phenomenon when lifting the drill. The suction will lead to consequences such as silt necking and hole collapse. When drilling through the slag removal cylinder, the cutting teeth set on the bottom wall of the slag removal cylinder are used to drill the rock. At this time, the second opening on the rotating disk communicates with the first opening on the bottom wall of the slag removal cylinder and the third opening on the fixed disk, and the sediment during drilling can be stored inside the slag removal cylinder. After drilling, the rotating disk is in a horizontal position by its own weight to block the core inside the slag removal cylinder. At this time, the second ventilation hole is connected to the ventilation pipe and the first and third ventilation holes, and the formed channel can increase the mud flow during lifting, reduce the mud resistance during lifting, and improve the efficiency of bored cast-in-place piles.

[0028] 2. An integrated counterweight is set on the rotating disk to increase the weight of the rotating disk and ensure that the rotating disk is in a horizontal position by its own weight in the natural state, so as to effectively block the core inside the inner tube of the slag removal cylinder. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of a device for sediment in bored cast-in-place piles in this application.

[0030] Figure 2 is Figure 1 Sectional view A-A.

[0031] Figure 3 is Figure 1 Sectional view B-B.

[0032] Description of the reference numerals: 1. Slag removal cylinder; 11. Grabbing ring; 12. Cutting teeth; 13. First opening; 14. Rotating disk; 141. Second opening; 142. Second ventilation hole; 143. Counterweight; 144. Limit groove; 15. Third ventilation hole; 2. Air guiding device; 21. Fixed disk; 211. Third opening; 212. First ventilation hole; 213. Limit block; 22. Ventilation pipe. Detailed Description of the Embodiment

[0033] The following is a further detailed description of this application in combination with the attached Figures 1-3 drawings.

[0034] The embodiment of this application discloses a device for sediment in bored cast-in-place piles. Refer to Figure 1 , the device for sediment in bored cast-in-place piles includes a slag removal cylinder 1 and an air guiding device 2.

[0035] Refer to Figure 1, the slag cleaning cylinder 1, as the main component of the device, is provided with a grasping ring 11 or a hook at the top for convenient fixed connection with the telescopic rod. The inner wall of the slag cleaning cylinder 1 is coated with a layer of wear-resistant material to reduce the wear of the inner wall of the slag cleaning cylinder 1 by crushed stones during the drilling process and extend the service life of the slag cleaning cylinder 1. Its bottom wall is particularly provided with cutting teeth 12. The cutting teeth 12 start from the center of the slag cleaning cylinder 1 and are radially arranged at the bottom of the slag cleaning cylinder 1 and are made of cemented carbide material to enhance durability and improve cutting efficiency. Specifically, two cutting teeth 12 are arranged along the bottom wall of the slag cleaning cylinder 1. The unique strip design of the cutting teeth 12 enables it to cut rocks more efficiently during drilling.

[0036] Refer to Figure 1 , Figure 2 , an arc-shaped first opening 13 is provided on the side of the bottom wall of the slag cleaning cylinder 1 where the cutting teeth 12 are located. This design is to coincide with the natural discharge path of the crushed stones and more effectively discharge the sediment. At the same time, a rotating disk 14 that can freely rotate around the axis of the slag cleaning cylinder 1 is installed at the lower end of the inner tube of the slag cleaning cylinder 1. The rotating disk 14 is connected to the inner tube of the slag cleaning cylinder 1 through a bearing to facilitate the stable rotation of the rotating disk 14. At the same time, seals are provided on both sides of the bearing to prevent mud from leaking into the bearing interior and ensure the stability and service life of the device. A second opening 141 matching the first opening 13 is provided on the rotating disk 14, so that the sediment generated during the drilling process can smoothly enter the interior of the slag cleaning cylinder 1 through these two corresponding openings. The rotating disk 14 is also specially designed with a certain self-weight so that it can maintain a horizontal position by its own weight in the natural state, thereby effectively blocking the core in the inner tube of the slag cleaning cylinder 1.

[0037] Refer to Figure 1 , the air guiding device 2 is composed of a fixed disk 21 and a ventilation pipe 22.

[0038] Refer to Figure 1 , Figure 3 , specifically, the fixed disk 21 is firmly arranged inside the slag cleaning cylinder 1, its bottom surface abuts against the top surface of the rotating disk 14. A third opening 211 with the same size as the first opening 13 is provided on the fixed disk 21, and a first ventilation hole 212 is provided at a position deviating from the third opening 211.

[0039] Refer to Figure 1 , one end of the ventilation pipe 22 is closely connected to the fixed disk 21 and communicates with the first ventilation hole 212; the other end is connected to the top wall of the slag cleaning cylinder 1. It is particularly worth mentioning that a second ventilation hole 142 matching the first ventilation hole 212 is also provided on the rotating disk 14, and a third ventilation hole 15 with the same size and axis as the first ventilation hole 212 is also provided on the bottom wall of the slag cleaning cylinder 1.

[0040] When the rotating disk 14 rotates to a position where its second opening 141 corresponds to the inner side of the bottom wall of the slag cleaning cylinder 1, the second ventilation hole 142 will exactly communicate with the first ventilation hole 212 on the fixed disk 21, the third ventilation hole 15 on the bottom wall of the slag cleaning cylinder 1, and the ventilation pipe 22. This design can provide a smoother flow channel for the slurry during the lifting process of the slag cleaning cylinder 1, thereby effectively reducing the slurry resistance and improving the construction efficiency of the bored cast-in-place pile.

[0041] Referring to Figure 1 , an integrated counterweight 143 is also provided on the rotating disk 14. The counterweight 143 is located at the edge of the rotating disk 14, which not only increases the self-weight of the rotating disk 14 to ensure that it can horizontally block the core under natural conditions, but also effectively utilizes the centrifugal force to help the rotating disk 14 maintain a more stable state during operation.

[0042] A limit block 213 is provided at the bottom of the fixed disk 21, and a limit groove 144 for the movement of the limit block 213 is provided on the upper surface of the rotating disk 14. By moving the limit block 213 in the limit groove 144, the relative position between the fixed disk 21 and the rotating disk 14 can be accurately controlled. When the limit block 213 is located at the first end of the limit groove 144, the positions of the first, second, and third openings 211 are the same, which is convenient for discharging the sediment generated during drilling into the slag cleaning cylinder 1. When the limit block 213 is located at the second end of the limit groove 144, the second ventilation hole 142 communicates with the ventilation pipe 22 and the first and third ventilation holes 15, which is convenient for the slurry to pass through the through hole, improving the rising efficiency of the slag cleaning cylinder 1 and the efficiency of the bored cast-in-place pile.

[0043] The implementation principle of a sediment device for a bored cast-in-place pile in an embodiment of the present application is as follows: Due to the fluid-plastic characteristics of the silt, air suction is likely to occur during the drill lifting process, and air suction will cause consequences such as silt necking and hole collapse. When drilling through the slag cleaning cylinder 1, the cutting teeth 12 provided on the bottom wall of the slag cleaning cylinder 1 are used to drill the rock. At this time, the second opening 141 on the rotating disk 14 communicates with the first opening 13 on the bottom wall of the slag cleaning cylinder 1 and the third opening 211 on the fixed disk 21, and the sediment generated during drilling can be stored inside the slag cleaning cylinder 1. After drilling is completed, the rotating disk 14 is in a horizontal position by its own weight to block the core inside the slag cleaning cylinder 1. At this time, the second ventilation hole 142 communicates with the ventilation pipe 22 and the first and third ventilation holes 15, and the formed channel can increase the slurry flow during lifting, reduce the slurry resistance during lifting, and improve the efficiency of the bored cast-in-place pile.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A bored pile sedimentation device, characterized in that: include: A slag cleaning barrel (1), wherein the bottom wall of the slag cleaning barrel (1) is provided with cutting teeth (12), wherein the cutting teeth (12) are arranged in a strip shape starting from the center of the slag cleaning barrel (1) and radiating to the bottom of the slag cleaning barrel (1), wherein the bottom wall of the slag cleaning barrel (1) is provided with a first opening (13) on the side of the cutting teeth (12), wherein the lower end of the inner tube of the slag cleaning barrel (1) is provided with a rotating disk (14) for supporting a core, wherein the rotating disk (14) rotates around the axis of the slag cleaning barrel (1) and is provided with a second opening (141) equal to the opening, wherein the rotating disk (14) is in a horizontal position by its own weight to seal the core in the inner tube; An air guide device (2), the air guide device (2) comprising a fixed disk (21) and a ventilation pipe (22), the fixed disk (21) being fixedly arranged inside the slag cleaning barrel (1), the bottom surface of which abuts against the top surface of the rotating disk (14), and a third opening (211) equal to the first opening (13) is provided on the fixed disk (21), a first ventilation hole (212) staggered with the third opening (211) is provided on the fixed disk (21), one end of the ventilation pipe (22) is fixedly connected to the fixed disk (21) and communicated with the first ventilation hole (212) , the other end is connected to the top wall of the slag cleaning barrel (1), the rotating disk (14) is provided with a second air hole (142) of equal size to the first air hole (212), the bottom wall of the slag cleaning barrel (1) is provided with a third air hole (15) equal to and coaxial with the first air hole (212), when the rotating disk (14) rotates until the second opening (141) is located inside the bottom wall of the slag cleaning barrel (1), the second air hole (142) is connected with the first air hole (212), the third air hole (15) and the air pipe (22).

2. The bored pile sediment device according to claim 1, characterized in that: The cutting teeth (12) are made of hard alloy material and are in the shape of strips, extending along the radial direction of the bottom wall of the slag cleaning barrel (1), and spacing is left between the cutting teeth (12).

3. The bored pile sediment device according to claim 1, characterized in that: The first opening (13), the second opening (141) and the third opening (211) are all designed to be arc-shaped.

4. The bored pile sedimentation device according to claim 1, characterized in that: A limit block (213) is arranged on one side where the fixed disk (21) abuts against the rotating disk (14); a limit groove (144) for the limit block (213) to move is arranged on the upper surface of the rotating disk (14); when the limit block (213) is located at the first end of the limit groove (144), the first opening (13) is located at the same position as the second opening (141) and the third opening (211); when the limit block (213) is located at the second end of the limit groove (144), the second ventilation hole (142) is connected to the ventilation pipe (22) and the first and third ventilation holes (15).

5. The bored pile sediment device according to claim 1, characterized in that: The rotating disk (14) is connected to the inner tube of the slag cleaning barrel (1) via a bearing, and sealing elements are provided on both sides of the bearing.

6. The bored pile sediment device according to claim 1, characterized in that: An integrated counterweight block (143) is provided on the rotating disk (14).

7. The bored pile sediment device according to claim 6, characterized in that: The counterweight block (143) is arranged on the edge of the rotating disk (14).

8. The bored pile sediment device according to claim 1, characterized in that: The inner wall of the slag cleaning cylinder (1) is coated with a layer of wear-resistant material.

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