A bottom sealing device for underwater full-casing concrete bored pile

Abstract

This invention discloses an underwater full-casing concrete cast-in-place pile sealing device, comprising: a fixed cylinder; and a reinforcement mechanism, the reinforcement mechanism including a support plate, reinforcement components, multiple sets of support components, and multiple sets of installation components. The support plate is fixedly connected to the inner wall of the fixed cylinder. The connecting spring pulls the connecting cylinder downward, simultaneously moving the installation block and four of the connecting components upward. Through the cooperation of the installation plate, connecting components, and moving plate, plus the rebound of the fixed spring, the moving plate tightly fits the full casing, avoiding gaps and preventing riverbed silt from impacting the concrete. It can also seal full casings of similar specifications. By fixing the sealing mechanism to the bottom of the fixed cylinder, and through the cooperation of fixing nails, fixing rings, support plates, reinforcement mesh, connecting components, multiple sets of installation components, steel mesh, and support rods, cement is poured into the fixed cylinder to form a cast-in-place cement block, which can improve the connection effect and strength between the fixed cylinder and the cement.

Description

Technical Field

[0001] This invention belongs to the field of concrete cast-in-place pile construction technology, specifically a bottom sealing device for underwater full-casing concrete cast-in-place piles. Background Technology

[0002] A cast-in-place concrete pile is a type of pile constructed by drilling a hole in place and then pouring in concrete or reinforced concrete. Based on the drilling method, they can be classified into bored piles, driven piles, manually excavated piles, and excavated piles with enlarged bases. Depending on the nature of the project, groundwater level, and soil properties, bored piles include those formed by impact drilling, rotary drilling, submersible drilling, and grouting. Except for grouting piles, the other three types are... Mud-wall bored piles and driven-tube bored piles refer to piles constructed using hammer driving or vibratory driving methods. A steel casing with a hinged pile tip or precast reinforced concrete pile shoe is driven into the soil, and then concrete is poured while the casing is hammered or vibrated and pulled out. The former is called hammer-driven driven-tube bored piles and casing-expanded bored piles, while the latter is called vibratory driven-tube bored piles. Manually excavated bored piles refer to piles constructed by manually excavating the hole, placing a reinforcing cage, and then pouring concrete. To ensure safety during the construction of manually excavated bored piles, it is essential to consider preventing hole wall collapse and quicksand. Reasonable wall protection measures must be developed. Wall protection methods include cast-in-place concrete wall protection, shotcrete wall protection, brick masonry wall protection, caisson wall protection, steel casing wall protection, and steel or wooden piling tool-type wall protection, among others.

[0003] In foundations with thick silt, such as riverbeds, cast-in-place concrete piles with full casings have been widely used in foundation engineering. During the pouring process, the first batch of concrete falling can impact the silt at the bottom of the pile onto the concrete, which can have an adverse effect on the pile bottom and even lead to problems such as pile breakage. The current solution is mainly to avoid this situation by using a bottom sealing device. However, existing bottom sealing devices are usually made of materials such as steel plates or rubber pads. When the bottom sealing device is placed in the full casing, it cannot fit tightly with the casing, and silt can still seep into the concrete through the gaps. At the same time, the existing bottom sealing devices have poor bonding with the poured cement, resulting in poor strength. Summary of the Invention

[0004] The purpose of this invention is to provide an underwater full-casing concrete cast-in-place pile sealing device. By moving the sealing device to the bottom of the full casing with a lifting ring, and then releasing the ring, the connecting spring pulls the connecting cylinder downwards, simultaneously moving the mounting block and four connecting parts upwards. The mounting plate and the four connecting parts move four moving plates, and the rebound of the fixing spring ensures that the moving plates fit tightly against the full casing, preventing gaps that could allow riverbed silt to impact the concrete and adversely affect the pile bottom. This invention can also seal full casings of similar specifications. The sealing mechanism is fixed to the bottom of the fixed cylinder, then multiple fixing nails and fixing rings are fixed to the bottom of the sealing mechanism. A support plate is welded to the inner wall of the fixed cylinder, then a reinforcing mesh is welded to the inner wall of the fixed cylinder, then multiple sets of connecting parts and multiple sets of mounting parts are fixed inside the fixed cylinder, and finally, a steel mesh and support rod are fixed inside the fixed cylinder. The fixed cylinder is placed in a suitable position, and then cement is poured into the fixed cylinder to form a cast-in-place cement block, which improves the connection and strength between the fixed cylinder and the cement.

[0005] The technical solution adopted in this invention is as follows: an underwater full-casing concrete cast-in-place pile sealing device, comprising:

[0006] Fixed cylinder;

[0007] The reinforcement mechanism includes a support plate, reinforcement components, multiple sets of support components, and multiple sets of mounting components. The support plate is fixedly connected to the inner wall of the fixed cylinder, and the reinforcement components, multiple sets of support components, and multiple sets of mounting components are all disposed inside the fixed cylinder.

[0008] A cement block is poured in, and the cement block is fixedly connected to the inner wall of the fixed cylinder; and

[0009] A sealing mechanism includes a fixed block, a protective cylinder, a pushing component, a connecting component, and four sets of sliding components. The top of the fixed block is fixedly connected to the bottom of the fixed cylinder, and the bottom end of the protective cylinder is fixedly connected through the bottom of the support plate. The pushing component is disposed on the fixed block, and the connecting component is disposed on the pushing component. Each set of sliding components is disposed on the connecting component and the fixed block.

[0010] The reinforcing component includes a reinforcing mesh, a steel mesh, and four support rods. The reinforcing mesh and the steel mesh are fixedly connected to the inner wall of the fixed cylinder. The reinforcing mesh is located directly above the support plate, and the steel mesh is located directly above the reinforcing mesh. The bottom end of each set of four support rods is fixedly connected to the top of the reinforcing mesh, and the top of each support rod is fixedly inserted through the steel mesh.

[0011] Each set of support components includes multiple support blocks and support cylinders. The bottom of the support cylinder is fixedly connected to the lower inner wall of the fixed cylinder, and the bottoms of the multiple support blocks are fixedly connected to the top of the support cylinder.

[0012] Each set of mounting components includes four mounting holes and a mounting cylinder. The bottom of the mounting cylinder is fixedly connected to the lower inner wall of the fixing cylinder, and each mounting hole is opened on the outer surface of the mounting cylinder.

[0013] The pushing component includes a connecting cylinder, a connecting rod, and a connecting spring. The bottom end of the connecting rod is fixedly connected to the top of the fixing block. Two mounting grooves are formed on the outer surface of the connecting rod. The connecting cylinder is slidably sleeved on the outer surface of the connecting rod through the two mounting grooves, and the connecting cylinder is located inside the protective cylinder. The connecting spring is fixedly connected to the connecting cylinder and the connecting rod, and the connecting spring is located inside the connecting cylinder.

[0014] The connecting component includes two mounting blocks, eight connectors, and four mounting plates. The two mounting blocks and two connectors are fixedly connected to the bottom edge of the connecting cylinder. The two connectors are fixedly connected to the bottom of the mounting blocks. The two ends of the four mounting plates are rotatably connected to the eight connectors.

[0015] Each set of sliding components includes a fixed spring, a movable plate, and a slider. The movable plate is slidably embedded between the inner walls of the fixed block. The top of the slider is fixedly connected to the bottom of the movable plate, and the slider is slidably embedded between the inner walls of the fixed block. The fixed spring is fixedly connected between the movable plate and the connecting rod. The bottoms of the four connecting parts are all fixedly connected to the top of the movable plate.

[0016] The top of the connecting cylinder is fixedly connected to a lifting ring.

[0017] The bottom of the fixing block is fixedly connected to multiple fixing nails, and the bottom of the fixing block is fixedly connected to a fixing ring.

[0018] A method for using an underwater full-casing concrete cast-in-place pile sealing device includes the following steps:

[0019] Step 1: Make the bottom seal: Fix the sealing mechanism to the bottom of the fixed cylinder, then fix multiple fixing nails and fixing rings to the bottom of the sealing mechanism, then weld the support plate to the inner wall of the fixed cylinder, then weld the reinforcing mesh to the inner wall of the fixed cylinder, then fix multiple sets of connecting parts and multiple sets of installation parts into the fixed cylinder, finally fix the steel mesh and support rod into the fixed cylinder, place the fixed cylinder in a suitable position, and then pour cement into the fixed cylinder;

[0020] Step 2, Moving the bottom sealing device: Wait for the cement to solidify and form a poured cement block. Weld the lifting ring to the top of the connecting cylinder to complete the bottom sealing device. Then, lift the bottom sealing device using the lifting ring. The weight of the bottom sealing device itself will cause the connecting cylinder to pull the mounting block and four of the connecting parts upward, stretching the connecting spring. Through the connection of the mounting plate, the other four connecting parts will pull the moving plate back into the fixed block, while simultaneously squeezing the fixed spring, thus compressing the fixed spring.

[0021] Step 3: Sealing the entire casing: When the sealing device is located at the bottom of the entire casing, loosen the lifting ring. At this time, the connecting spring pulls the connecting casing downwards, which in turn moves the mounting block and four connecting parts upwards. The mounting plate and the four connecting parts move the four moving plates. With the rebound of the fixing spring, the moving plates can fit tightly against the entire casing, avoiding gaps that could cause riverbed silt to impact the concrete and have an adverse effect on the pile bottom. It can also seal casings with similar specifications.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] (1) In this invention, by moving the bottom sealing device to the bottom position of the full casing by lifting the lifting ring, the connecting cylinder is moved down by the elastic force of the connecting spring when the lifting ring is released, and the mounting block and four connecting parts are moved up at the same time. The mounting plate and four connecting parts move the four moving plates. With the rebound of the fixed spring, the moving plates can fit tightly against the full casing, avoiding gaps that could cause the riverbed silt to impact the concrete and have an adverse effect on the pile bottom. At the same time, it can also seal full casings with similar specifications.

[0024] (2) In this invention, by fixing the sealing mechanism to the bottom of the fixed cylinder, then fixing multiple fixing nails and fixing rings to the bottom of the sealing mechanism, then welding the support plate to the inner wall of the fixed cylinder, then welding the reinforcing mesh to the inner wall of the fixed cylinder, then fixing multiple sets of connecting parts and multiple sets of installation parts into the fixed cylinder, finally fixing the steel mesh and support rod into the fixed cylinder, placing the fixed cylinder in a suitable position, and then pouring cement into the fixed cylinder to form a poured cement block, the connection effect and strength of the fixed cylinder and cement can be improved. Attached Figure Description

[0025] Figure 1 This is a frontal perspective view of the present invention;

[0026] Figure 2 This is a bottom-view perspective view of the present invention;

[0027] Figure 3 This is a perspective view of the front view portion of the present invention;

[0028] Figure 4This is a frontal half-sectional perspective view of the present invention;

[0029] Figure 5 This is a side view of the cross-sectional perspective of the present invention;

[0030] Figure 6 This is a partial frontal sectional perspective view of the present invention;

[0031] Figure 7 This is a top-view sectional perspective view of the present invention;

[0032] Figure 8 This is an exploded perspective view of the present invention;

[0033] Figure 9 This is a partially exploded perspective view of the present invention.

[0034] The markings in the diagram are: 1. Fixed cylinder; 2. Sealing mechanism; 201. Protective cylinder; 202. Connecting cylinder; 203. Connecting spring; 204. Connecting rod; 205. Connecting piece; 206. Mounting plate; 207. Fixed spring; 208. Fixed block; 209. Moving plate; 210. Sliding block; 211. Mounting block; 3. Cement block; 4. Lifting ring; 5. Reinforcing mechanism; 501. Support rod; 502. Steel mesh; 503. Support cylinder; 504. Support block; 505. Support plate; 506. Reinforcing mesh; 507. Mounting cylinder; 508. Mounting hole; 6. Fixing nail; 7. Fixing ring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example

[0036] Reference Figures 1-9 This invention provides a technical solution: an underwater full-casing concrete cast-in-place pile sealing device, comprising: a fixed cylinder 1; a reinforcement mechanism 5, the reinforcement mechanism 5 including a support plate 505, reinforcement components, multiple sets of support components and multiple sets of installation components, the support plate 505 being fixedly connected to the inner wall of the fixed cylinder 1, the reinforcement components, multiple sets of support components and multiple sets of installation components being disposed inside the fixed cylinder 1; a cement block 3 being poured, the cement block 3 being fixedly connected to the inner wall of the fixed cylinder 1; and a sealing mechanism 2, the sealing mechanism 2 including a fixed block 208, a protective cylinder 201, a pushing component, a connecting component and four sets of sliding components, the top of the fixed block 208 being fixedly connected to the bottom of the fixed cylinder 1, the bottom end of the protective cylinder 201 being fixedly penetrated through the bottom of the support plate 505, the pushing component being disposed on the fixed block 208, the connecting component being disposed on the pushing component, and each set of sliding components being disposed on the connecting component and the fixed block 208.

[0037] In this implementation scheme: the fixed cylinder 1 is made of steel and is used to store cement. The reinforcement mechanism 5 can increase the connection between the steel plate and the cement. The support plate 505 is used to support and seal the fixed cylinder 1. The reinforcement components, multiple sets of support components and multiple sets of installation components are used to increase the connection between the cement and the steel plate, and at the same time increase the robustness of the bottom sealing device. The cement block 3 is used to seal the fixed cylinder 1. The sealing mechanism 2 is used to tightly fit the entire protective cylinder. The fixing block 208 is used to install and support the sealing mechanism 2. The protective cylinder 201 serves to protect the sealing mechanism 2 and prevent cement from entering the sealing mechanism 2. The pushing component is used to adjust the position of the connecting component. The connecting component is used to connect the sliding component and the pushing component. The four sets of sliding components are used to tightly fit the entire protective cylinder.

[0038] Specifically, the reinforcing components include a reinforcing mesh 506, a reinforcing steel mesh 502, and four support rods 501. The reinforcing mesh 506 and the reinforcing steel mesh 502 are both fixedly connected to the inner wall of the fixing cylinder 1. The reinforcing mesh 506 is located directly above the support plate 505, and the reinforcing steel mesh 502 is located directly above the reinforcing mesh 506. The bottom end of each group of four support rods 501 is fixedly connected to the top of the reinforcing mesh 506, and the top of each support rod 501 is fixedly inserted through the reinforcing steel mesh 502.

[0039] In this embodiment, the reinforcement mesh 506, the steel mesh 502, and the four support rods 501 are used to increase the connection effect between the fixing cylinder 1 and the cement, and at the same time increase the sturdiness of the bottom sealing device.

[0040] Specifically, each set of support components includes multiple support blocks 504 and support cylinders 503. The bottom of the support cylinder 503 is fixedly connected to the lower inner wall of the fixed cylinder 1, and the bottoms of the multiple support blocks 504 are all fixedly connected to the top of the support cylinder 503.

[0041] In this embodiment, the arrangement of multiple support blocks 504 and support cylinders 503 is used to increase the connection effect between the fixing cylinder 1 and the cement. By pouring cement into the multiple support blocks 504 and support cylinders 503, the cement can be connected with the multiple support blocks 504 and support cylinders 503.

[0042] Specifically, each set of mounting components includes four mounting holes 508 and a mounting cylinder 507. The bottom of the mounting cylinder 507 is fixedly connected to the lower inner wall of the fixing cylinder 1, and each mounting hole 508 is opened on the outer surface of the mounting cylinder 507.

[0043] In this embodiment: the mounting cylinder 507 is provided to increase the connection effect between the fixing cylinder 1 and the cement, and the mounting hole 508 can make the cement and the mounting cylinder 507 more tightly connected.

[0044] Specifically, the pushing component includes a connecting cylinder 202, a connecting rod 204, and a connecting spring 203. The bottom end of the connecting rod 204 is fixedly connected to the top of the fixing block 208. Two mounting grooves are provided on the outer surface of the connecting rod 204. The connecting cylinder 202 is slidably sleeved on the outer surface of the connecting rod 204 through the two mounting grooves, and the connecting cylinder 202 is located inside the protective cylinder 201. The connecting spring 203 is fixedly connected to the connecting cylinder 202 and the connecting rod 204, and the connecting spring 203 is located inside the connecting cylinder 202.

[0045] In this embodiment: the connecting cylinder 202, the connecting rod 204, and the connecting spring 203 are provided for support and connection. The mounting groove can prevent the connecting cylinder 202 from rotating inside the connecting rod 204. The connecting cylinder 202 can slide on the connecting rod 204. The connecting spring 203 can restore the connecting cylinder 202 to its original shape. By stretching the connecting cylinder 202, the connecting spring 203 can be stretched.

[0046] Specifically, the connecting components include two mounting blocks 211, eight connectors 205, and four mounting plates 206. The two mounting blocks 211 and the two connectors 205 are fixedly connected to the bottom edge of the connecting cylinder 202. The two connectors 205 are fixedly connected to the bottom of the mounting blocks 211. Both ends of the four mounting plates 206 are rotatably connected to the eight connectors 205.

[0047] In this embodiment: the two mounting blocks 211 are used to connect two of the connectors 205, the eight connectors 205 are used to install four mounting plates 206, the four mounting plates 206 are used to connect, and the connectors 205 and mounting plates 206 can be moved by pulling the connecting cylinder 202.

[0048] Specifically, each set of sliding components includes a fixed spring 207, a movable plate 209, and a slider 210. The movable plate 209 is slidably embedded between the inner walls of the fixed block 208. The top of the slider 210 is fixedly connected to the bottom of the movable plate 209, and the slider 210 is slidably embedded between the inner walls of the fixed block 208. The fixed spring 207 is fixedly connected between the movable plate 209 and the connecting rod 204. The bottoms of the four connecting pieces 205 are all fixedly connected to the top of the movable plate 209.

[0049] In this embodiment: the fixed spring 207 can restore the movable plate 209 to its original shape. The movable plate 209 is fan-shaped. Through the cooperation of multiple movable plates 209, the movable plate 209 can be tightly attached to the entire protective cylinder. The slider 210 can make the movable plate 209 slide stably.

[0050] Specifically, the top of the connecting cylinder 202 is fixedly connected to a lifting ring 4, the bottom of the fixing block 208 is fixedly connected to multiple fixing nails 6, and the bottom of the fixing block 208 is fixedly connected to a fixing ring 7.

[0051] In this embodiment: the lifting ring 4 can facilitate the workers to move the bottom sealing device, and the fixing nail 6 and fixing ring 7 can make the sealing mechanism 2 fit with the riverbed silt, preventing the fixing cylinder 1 from shifting.

[0052] The following describes in detail the usage method of an underwater full-casing concrete cast-in-place pile sealing device provided by an embodiment of the present invention. The usage method includes the following steps: Step 1, making the sealing device: Fix the sealing mechanism 2 to the bottom of the fixed cylinder 1, then fix multiple fixing nails 6 and fixing rings 7 to the bottom of the sealing mechanism 2, then weld the support plate 505 to the inner wall of the fixed cylinder 1, then weld the reinforcing mesh 506 to the inner wall of the fixed cylinder 1, then fix multiple sets of connecting parts and multiple sets of installation parts into the fixed cylinder 1, and finally fix the steel mesh 502 and support rod 501 into the fixed cylinder 1. Place the fixed cylinder 1 in a suitable position, and then pour cement into the fixed cylinder 1; Step 2, moving the sealing device: Wait for the cement to solidify and form the poured cement block 3, weld the lifting ring 4 to the top of the connecting cylinder 202, and the sealing device is completed. Then lift the sealing device using the lifting ring 4, and move the sealing device itself. Gravity causes the connecting cylinder 202 to pull the mounting block 211 and four of the connecting parts 205 upwards, stretching the connecting spring 203. Through the connection of the mounting plate 206, the other four connecting parts 205 pull the moving plate 209 back into the fixed block 208, while simultaneously squeezing the fixed spring 207, thus compressing the fixed spring 207. Step 3: Sealing the entire casing: When the sealing device is located at the bottom of the entire casing, the lifting ring 4 is released. At this time, the elastic force of the connecting spring 203 causes the connecting cylinder 202 to move downwards, while simultaneously driving the mounting block 211 and four of the connecting parts 205 upwards. The mounting plate 206 and the four connecting parts 205 cause the four moving plates 209 to move. With the rebound of the fixed spring 207, the moving plates 209 can be tightly fitted to the entire casing, avoiding gaps that could cause riverbed silt to impact the concrete and have an adverse effect on the pile bottom. It can also seal casings with similar specifications.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing device for underwater full-casing concrete cast-in-place piles, characterized in that, include: Fixed cylinder (1); The reinforcement mechanism (5) includes a support plate (505), reinforcement components, multiple sets of support components and multiple sets of installation components. The support plate (505) is fixedly connected to the inner wall of the fixed cylinder (1). The reinforcement components, multiple sets of support components and multiple sets of installation components are all disposed inside the fixed cylinder (1). Cement blocks (3) are poured in, and the cement blocks (3) are fixedly connected to the inner walls of the fixed cylinder (1); and The sealing mechanism (2) includes a fixed block (208), a protective cylinder (201), a pushing component, a connecting component, and four sets of sliding components. The top of the fixed block (208) is fixedly connected to the bottom of the fixed cylinder (1), and the bottom end of the protective cylinder (201) is fixedly connected through the bottom of the support plate (505). The pushing component is disposed on the fixed block (208), and the connecting component is disposed on the pushing component. Each set of sliding components is disposed on the connecting component and the fixed block (208). The reinforcing components include a reinforcing mesh (506), a reinforcing steel mesh (502), and four support rods (501). The reinforcing mesh (506) and the reinforcing steel mesh (502) are fixedly connected to the inner wall of the fixed cylinder (1). The reinforcing mesh (506) is located directly above the support plate (505), and the reinforcing steel mesh (502) is located directly above the reinforcing mesh (506). The bottom end of each set of four support rods (501) is fixedly connected to the top of the reinforcing mesh (506), and the top of each support rod (501) is fixedly inserted through the reinforcing steel mesh (502). Each set of support components includes multiple support blocks (504) and support cylinders (503). The bottom of the support cylinder (503) is fixedly connected to the lower inner wall of the fixed cylinder (1), and the bottom of the multiple support blocks (504) is fixedly connected to the top of the support cylinder (503). Each set of mounting components includes four mounting holes (508) and a mounting cylinder (507). The bottom of the mounting cylinder (507) is fixedly connected to the lower inner wall of the fixing cylinder (1), and each mounting hole (508) is opened on the outer surface of the mounting cylinder (507). The pushing component includes a connecting cylinder (202), a connecting rod (204), and a connecting spring (203). The bottom end of the connecting rod (204) is fixedly connected to the top of the fixing block (208). Two mounting grooves are provided on the outer surface of the connecting rod (204). The connecting cylinder (202) is slidably sleeved on the outer surface of the connecting rod (204) through the two mounting grooves, and the connecting cylinder (202) is located inside the protective cylinder (201). The connecting spring (203) is fixedly connected to the connecting cylinder (202) and the connecting rod (204), and the connecting spring (203) is located inside the connecting cylinder (202). The connecting component includes two mounting blocks (211), eight connectors (205), and four mounting plates (206), wherein the two mounting blocks (211) and the two connectors (205) are fixedly connected to the bottom edge of the connecting cylinder (202), wherein the two connectors (205) are fixedly connected to the bottom of the mounting blocks (211), and both ends of the four mounting plates (206) are rotatably connected to the eight connectors (205); Each set of sliding components includes a fixed spring (207), a movable plate (209), and a slider (210). The movable plate (209) is slidably embedded between the inner walls of the fixed block (208). The top of the slider (210) is fixedly connected to the bottom of the movable plate (209), and the slider (210) is slidably embedded between the inner walls of the fixed block (208). The fixed spring (207) is fixedly connected between the movable plate (209) and the connecting rod (204). The bottoms of the four connecting parts (205) are all fixedly connected to the top of the movable plate (209).

2. The underwater full-casing concrete cast-in-place pile sealing device as described in claim 1, characterized in that: The top of the connecting cylinder (202) is fixedly connected to a lifting ring (4).

3. The underwater full-casing concrete cast-in-place pile sealing device as described in claim 2, characterized in that: The bottom of the fixing block (208) is fixedly connected to a plurality of fixing nails (6), and the bottom of the fixing block (208) is fixedly connected to a fixing ring (7).

4. A method of using an underwater full-casing concrete pile bottom sealing device, applied to the underwater full-casing concrete pile bottom sealing device described in claim 3, characterized in that, Includes the following steps: S1. Making the bottom: Fix the sealing mechanism (2) to the bottom of the fixed cylinder (1), then fix multiple fixing nails (6) and fixing rings (7) to the bottom of the sealing mechanism (2), then weld the support plate (505) to the inner wall of the fixed cylinder (1), then weld the reinforcing mesh (506) to the inner wall of the fixed cylinder (1), then fix multiple sets of connecting parts and multiple sets of installation parts into the fixed cylinder (1), finally fix the steel mesh (502) and support rod (501) into the fixed cylinder (1), place the fixed cylinder (1) in a suitable position, and then pour cement into the fixed cylinder (1); S2, Moving bottom sealing device: Wait for the cement to solidify and form a poured cement block (3), weld the lifting ring (4) to the top of the connecting cylinder (202), and complete the bottom sealing device. Then, lift the bottom sealing device through the lifting ring (4). By the weight of the bottom sealing device itself, the connecting cylinder (202) pulls the mounting block (211) and four of the connecting parts (205) upward, so that the connecting spring (203) is stretched. Through the connection of the mounting plate (206), the other four connecting parts (205) pull the moving plate (209) back into the fixed block (208), while squeezing the fixed spring (207), so that the fixed spring (207) is compressed. S3. Sealing the entire casing: When the sealing device is located at the bottom of the entire casing, the lifting ring (4) is loosened. At this time, the connecting spring (203) pulls the connecting cylinder (202) downward, and at the same time drives the mounting block (211) and four connecting parts (205) to move upward. The mounting plate (206) and the four connecting parts (205) move the four moving plates (209). With the rebound of the fixing spring (207), the moving plates (209) can fit tightly against the entire casing, avoiding gaps that could cause the riverbed silt to impact the concrete and have an adverse effect on the pile bottom. At the same time, it can also seal the entire casing with similar specifications.

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