A corrosion-proof pouring device for cast-in-place piles and an operating method thereof

Abstract

The application discloses a kind of anti-corrosion cast-in-place pile and its operating method, including with outside winding connection of release equipment metal pull rope, metal pull rope bottom is fixedly provided with expansion assembly, expansion assembly is provided with moving platform, expansion assembly is movably provided with multiple threaded rods and threaded rod is threadedly connected with moving platform, in the process of moving on expansion assembly, drive the auxiliary pipe on top cap to move up until inserted inside intermediate pipe, promote seal to move up, finally when expansion assembly moves to moving platform cooperation, auxiliary hole and L-shaped grouting pipeline form communication between, above can be realized anticorrosion film protection while carrying out hole fitting operation to film to avoid film wrinkle etc. Cause the structure of pouring to produce irregular shape, avoid the wrinkle in the process of pouring to flow to middle part to cause the influence of the gap of cast-in-place pile to overall quality.

Description

Technical Field

[0001] This invention belongs to the field of cast-in-place pile technology, specifically relating to a grouting device for anti-corrosion cast-in-place piles and its operating method. Background Technology

[0002] With the rapid development of my country's power grid, more and more power transmission and transformation lines are crossing rivers, lakes, and swamps, leading to the widespread use of cast-in-place pile foundations. However, in corrosive areas such as saline-alkali soils, the problem of corrosion prevention for cast-in-place pile foundations has remained unresolved. In recent years, a method has been developed to wrap the cast-in-place pile foundation with two layers of long-filament woven polypropylene (PP) geotextile and one layer of high-density polyethylene (HDPE) membrane. This method effectively isolates the concrete from saline soil and groundwater in weak and corrosive areas, thus solving the problem of chemical damage to the concrete material caused by corrosive soil. It provides excellent corrosion protection while ensuring pile quality and eliminating potential quality problems such as diameter reduction, mud inclusion, and short piles. Anti-corrosion bags have high tensile strength and can effectively increase the bearing capacity of the foundation by 2-10 times under suitable foundation conditions. However, traditional anti-corrosion films are laid manually without specialized equipment and are mostly used for precast cast-in-place piles. For cast-in-place piles, pre-setting the film before pouring can easily lead to problems such as film wrinkling during the pouring process, which affect the overall strength of the pile. There is no integrated equipment that combines pouring and film pre-setting to solve the problem of anti-corrosion film laying for cast-in-place piles on site. Summary of the Invention

[0003] The purpose of this invention is to provide a grouting device and its operation method for anti-corrosion cast-in-place piles, so as to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a grouting device for anti-corrosion cast-in-place piles, comprising a metal pull rope that is wound and connected to an external launching and receiving device, an expansion component fixedly provided at the bottom of the metal pull rope, a moving platform provided on the expansion component, a plurality of threaded rods movably provided on the expansion component and threadedly connected to the moving platform, pulleys being sleeved on the outer sides of the plurality of threaded rods, and the plurality of pulleys being synchronously driven by a synchronous belt; The mobile platform is equipped with a central pipe, one side of which is connected to an external grouting device via an L-shaped grouting pipe, and a rotating component is provided on the outside of the central pipe. The rotating component includes a circular block that is movably connected to the mobile platform. A gear ring is also provided on the inner side of the circular block. A gear is meshed on the inner side of the gear ring and a motor is driven on the gear. The rotating component has at least two bonding components on its outer side, and each bonding component is a three-section arc-shaped heating tube. The two bonding components are staggered. The arc-shaped heating tubes are connected to the rotating component through an expansion mechanism. The rotation of the rotating component drives the expansion mechanism to push the multiple arc-shaped heating tubes outward.

[0005] Preferably, the expansion mechanism includes a telescopic rod with its two ends hinged to the fitting component and the circular block, respectively. A sleeve is fitted on the outer side of the telescopic rod, and a vertical rod is movably connected to the bottom of the sleeve. The bottom of the vertical rod is fixedly connected to the moving platform.

[0006] Preferably, the expansion assembly includes a top cover fixedly connected to a metal pull rope, a base plate at the bottom of the top cover and the top cover and the base plate being connected to each other by a column, a threaded disc movably disposed on the top of the base plate, a gear ring two disposed at the bottom of the threaded disc, a gear three meshing with one side of the gear ring two, and a motor two driving the threaded disc to rotate at the bottom of the gear three, and a plurality of arc-shaped expansion members disposed on the top of the threaded disc, the plurality of arc-shaped expansion members being slidably connected to the top cover and forming a three-jaw chuck-type threaded connection with the threaded disc.

[0007] Preferably, the intermediate pipe is provided with a sealing element inside, and the connection between the L-shaped grouting pipe and the intermediate pipe is blocked by the sealing element. Several sliding rods are fixedly connected to the top of the sealing element. The top of the sliding rod extends to the outside of the intermediate pipe and a limit ring is fixed to the top. A second spring is sleeved on the outside of the sliding rod and the second spring is located between the limit ring and the top of the intermediate pipe.

[0008] Preferably, an auxiliary pipe is fixedly installed on the top cover, and the bottom of the auxiliary pipe penetrates the entire expansion assembly and is movably connected to the entire expansion assembly. An auxiliary hole is opened on the auxiliary pipe, and the auxiliary hole is adapted to the L-shaped grouting pipe on one side of the middle pipe. After the auxiliary pipe is inserted into the middle pipe and pushes the sealing element to move upward, a connection is formed between the auxiliary hole and the L-shaped grouting pipe.

[0009] Preferably, a metal block is provided at one end of the telescopic rod connecting to the bonding component. The metal block is fixedly connected to the bonding component. An electromagnet is provided between one end of the metal block and the telescopic rod. A spring is connected between the electromagnet and the metal block.

[0010] Preferably, the top of the L-shaped grouting pipe is provided with a grouting hose and an external grouting device is connected through the grouting hose.

[0011] Preferably, a driven gear is fixedly provided on the outer side of one of the threaded rods, a driving gear is meshed with one side of the driven gear, and a motor is drivenly connected to the bottom of the driving gear.

[0012] An operation method for a grouting device used in anti-corrosion cast-in-place piles, the specific steps of which are as follows: S1. First, place the device on the anti-corrosion film, and then use external launching and pulling equipment and metal ropes to move the entire device down into the hole to be filled until the bottom. S2. Start the motor two at the bottom of the gear three to drive the threaded disc to rotate. The rotation of the threaded disc will cause multiple arc-shaped expansion parts to expand outward in sync. During the expansion process, the anti-corrosion film will continuously adhere to the inner wall of the hole until it is tightly adhered to the inner wall of the hole, and then the motor two will be turned off. S3. Then start the motor connected to the gear ring drive to drive the circular block to rotate. During the rotation of the circular block, multiple expansion mechanisms will drive the arc heating tubes on multiple bonding components to expand outward synchronously until they are bonded to the inner wall of the hole. After bonding, start motor four to drive multiple threaded rods to rotate until the moving platform and the bonding components, expansion mechanisms and rotating components on the top of the moving platform move upward as a whole. During the upward movement, the expanded bonding components will squeeze the anti-corrosion film to bond to the hole wall and use heating to temporarily plastically fix the squeezed film until it moves to the highest point of the threaded rod. S4. At this time, multiple fitting components are pressed and fixed between the components and the hole wall. Then, multiple arc-shaped expansion components are contracted. Then, external retraction and extension equipment is used to pull the metal rope to move the expansion components upward until they are moved to the bottom of the moving platform. S5. During the upward movement of the expansion component, the auxiliary pipe on the top cover is moved upward until it is inserted into the middle pipe, pushing the seal upward. Finally, when the expansion component moves to the moving platform to cooperate, the auxiliary hole and the L-shaped grouting pipe are connected, so that the injected material is injected into the bottom of the expansion component. Then, the above operation is repeated to move the moving platform upward. During the upward movement, the elasticity of the second spring is used to push the seal to automatically close the channel of the L-shaped grouting pipe.

[0013] The technical effects and advantages of this invention are as follows: By using multiple expanded bonding components to compress and bond the anti-corrosion film to the hole wall and using heating to temporarily plastically fix the compressed film until it moves to the highest point of the threaded rod, the multiple bonding components are used to compress and fix it to the hole wall. Then, multiple arc-shaped expansion parts are contracted, and then the expansion components are moved upward by pulling the metal rope with an external release device until they move to the bottom of the moving platform. During the upward movement of the expansion components, the auxiliary pipe on the top cover is moved upward until it is inserted into the middle pipe, pushing the sealing part upward. Finally, when the expansion components move to the moving platform and cooperate, the auxiliary hole and the L-shaped grouting pipe are connected, so that the grouting material is injected to the bottom of the expansion components. Then, the above operation is repeated to move the moving platform upward. During the upward movement, the elasticity of the second spring pushes the sealing part to automatically close the channel of the L-shaped grouting pipe. In summary, while the anti-corrosion film provides protection, the hole bonding operation of the film can be performed to avoid the irregular shape of the grouting structure caused by the film wrinkles, and to prevent wrinkles from flowing with the grout to the middle during the grouting process, causing gaps in the grouting pile and affecting the overall quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of the structure of section A in the middle; Figure 3 This is a front view of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of a section of the central B-shaped structure; Figure 5 This is a schematic diagram of the sealing component installation structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of the structure of section C; Figure 7 This is an exploded view of the expansion component of the present invention; Figure 8 This is a bottom view of the expanded component of the present invention in an exploded state; Figure 9 This is a schematic diagram of the electromagnet mounting structure of the present invention.

[0015] In the diagram: 1. Expansion assembly; 101. Threaded disc; 102. Gear three; 103. Chassis; 104. Arc-shaped expansion piece; 105. Top cover; 106. Gear ring two; 2. Fitting assembly; 3. Metal pull rope; 4. Grouting hose; 5. L-shaped grouting pipe; 6. Intermediate pipe; 7. Rotating assembly; 701. Circular block; 702. Gear ring; 8. Expansion mechanism; 801. Telescopic rod; 802. Sleeve; 803. Vertical pole; 804. Electromagnet; 805. Metal block; 806. Spring; 9. Auxiliary pipe; 10. Synchronous belt; 11. Moving platform; 12. Auxiliary hole; 13. Threaded rod; 14. Driven gear; 15. Driving gear; 16. Motor four; 17. Pulley; 18. Seal; 19. Limiting ring; 20. Spring two; 21. Sliding rod. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] This invention provides a grouting device for anti-corrosion cast-in-place piles as shown in the figure, including a metal rope 3 that is wound and connected to an external receiving and releasing device. An expansion component 1 is fixedly installed at the bottom of the metal rope 3. A moving platform 11 is installed on the expansion component 1. Multiple threaded rods 13 are movably installed on the expansion component 1 and are threadedly connected to the moving platform 11. Each of the multiple threaded rods 13 is fitted with a pulley 17 on its outer side, and the multiple pulleys 17 are synchronously driven by each other through a synchronous belt 10. The mobile platform 11 is equipped with an intermediate pipe 6. One side of the intermediate pipe 6 is connected to an external grouting device via an L-shaped grouting pipe 5. A rotating component 7 is installed on the outside of the intermediate pipe 6. The rotating component 7 includes a circular block 701 that is movably connected to the mobile platform 11. A gear ring 702 is also provided on the inner side of the circular block 701. A gear is meshed with the inner side of the gear ring 702 and a motor is driven on the gear. At least two bonding components 2 are provided on the outside of the rotating component 7, and the bonding component 2 is a three-section arc-shaped heating tube. The two bonding components 2 are staggered with each other. The arc-shaped heating tubes are connected to the rotating component 7 through the expansion mechanism 8. The rotation of the rotating component 7 drives the expansion mechanism 8 to push the multiple arc-shaped heating tubes outward.

[0018] Specifically, the expansion mechanism 8 includes a telescopic rod 801 with its two ends hinged to the fitting component 2 and the circular block 701, respectively. A sleeve 802 is fitted on the outside of the telescopic rod 801, and a vertical rod 803 is movably connected to the bottom of the sleeve 802. The bottom of the vertical rod 803 is fixedly connected to the moving platform 11.

[0019] Specifically, the expansion assembly 1 includes a top cover 105 fixedly connected to the metal pull rope 3. A base 103 is provided at the bottom of the top cover 105, and the top cover 105 and the base 103 are connected to each other by a column. A threaded disc 101 is movably provided at the top of the base 103. A gear ring 106 is provided at the bottom of the threaded disc 101. A gear 102 is meshed with one side of the gear ring 106, and a motor 2 is driven to rotate the threaded disc 101 at the bottom of the gear 102. A plurality of arc-shaped expansion members 104 are provided at the top of the threaded disc 101. The plurality of arc-shaped expansion members 104 are slidably connected to the top cover 105 and form a three-jaw chuck-type threaded connection with the threaded disc 101.

[0020] Specifically, a sealing element 18 is provided inside the intermediate pipe 6, and the connection between the L-shaped grouting pipe 5 and the intermediate pipe 6 is blocked by the sealing element 18. Several sliding rods 21 are fixedly connected to the top of the sealing element 18. The top of the sliding rods 21 extends to the outside of the intermediate pipe 6 and a limit ring 19 is fixed at the top. A second spring 20 is sleeved on the outside of the sliding rods 21 and the second spring 20 is located between the limit ring 19 and the top of the intermediate pipe 6.

[0021] Specifically, an auxiliary pipe 9 is fixedly installed on the top cover 105, and the bottom of the auxiliary pipe 9 penetrates the entire expansion component 1 and is movably connected to the entire expansion component 1. An auxiliary hole 12 is opened on the auxiliary pipe 9, and the auxiliary hole 12 is adapted to the L-shaped grouting pipe 5 on one side of the middle pipe 6. After the auxiliary pipe 9 is inserted into the middle pipe 6 and pushes the sealing member 18 to move upward, a connection is formed between the auxiliary hole 12 and the L-shaped grouting pipe 5.

[0022] Specifically, a metal block 805 is provided at one end of the telescopic rod 801 connected to the bonding component 2. The metal block 805 is fixedly connected to the bonding component 2. One end of the metal block 805 extends into the interior of the telescopic rod 801. An electromagnet 804 is provided between the metal block 805 and the telescopic rod 801. A spring 806 is connected between the electromagnet 804 and the metal block 805.

[0023] Specifically, the top of the L-shaped grouting pipe 5 is equipped with a grouting hose 4 and an external grouting device is connected through the grouting hose 4.

[0024] Specifically, a driven gear 14 is fixedly installed on the outside of one of the threaded rods 13, and a driving gear 15 is meshed with one side of the driven gear 14. A motor 16 is driven to the bottom of the driving gear 15.

[0025] Example 1: Place the device on the anti-corrosion film, and then use external launching and lowering equipment and metal rope 3 to move the entire device down into the hole to be filled until it reaches the bottom. Start the motor 2 at the bottom of gear 3 102 to drive the threaded disc 101 to rotate. The rotation of the threaded disc 101 causes multiple arc-shaped expansion members 104 to expand outwards synchronously. During the expansion process, the anti-corrosion film continuously adheres to the inner wall of the hole until it is tightly adhered to the inner wall of the hole. Then, turn off motor 2 and start the motor connected to the gear ring 702 to drive the circular block. During the rotation of the circular block 701, multiple expansion mechanisms 8 drive the arc-shaped heating tubes on multiple bonding components 2 to expand outward synchronously until they are bonded to the inner wall of the hole. After bonding, motor 4 16 is started, driving multiple threaded rods 13 to rotate until the moving platform 11 and the bonding components 2, expansion mechanisms 8, and rotating components 7 on the top of the moving platform 11 move upward as a whole. During the upward movement, the expanded bonding components 2 squeeze the anti-corrosion film to bond to the hole wall, and heat is used to temporarily heat the squeezed film. The plastic fixation is performed until it moves to the highest point of the threaded rod 13. Multiple fitting components 2 are used to press and fix it between the hole wall and the hole. Then, multiple arc-shaped expansion parts 104 are contracted. Then, the metal rope 3 is pulled by the external release and release equipment to move the expansion component 1 upward until it moves to the bottom of the moving platform 11. During the upward movement of the expansion component 1, the auxiliary pipe 9 on the top cover 105 is moved upward until it is inserted into the middle pipe 6. The sealing part 18 is pushed upward. Finally, when the expansion component 1 moves to the moving platform 11 to cooperate, the auxiliary hole 12 and the L-shaped grouting pipe 5 are connected, so that the grouting material is injected into the bottom of the expansion component 1. Then, the above operation is repeated to move the moving platform 11 upward. During the upward movement, the elasticity of the spring 20 is used to push the sealing part 18 to automatically close the channel of the L-shaped grouting pipe 5. In summary, while achieving the protection of the anti-corrosion film, the hole fitting operation of the film can be performed to avoid the irregular shape of the grouting structure caused by the film wrinkles. It can also prevent the wrinkles from flowing with the grout to the middle during the grouting process, causing gaps in the grouting pile and affecting the overall quality. Example 2: By using the electromagnet 804, metal block 805, and spring 806, the electromagnet 804 can be continuously switched on and off during the upward movement of the bonding component 2, generating intermittent adsorption force to attract the metal block 805 and the bonding component 2. This causes the multiple arc-shaped heating tubes on the bonding component 2 to continuously contract and expand, avoiding the situation where hard objects or other rough surfaces during the hole excavation process cause scratches between the film and hard objects during the pushing of the bonding component 2, thus ensuring the integrity of the film while ensuring the film adheres to the hole wall.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A grouting device for anti-corrosion cast-in-place piles, comprising a metal rope for winding and connecting with external deployment and recovery equipment, characterized in that: An expansion assembly is fixedly installed at the bottom of the metal pull rope. A moving platform is installed on the expansion assembly. Multiple threaded rods are movably installed on the expansion assembly and are threadedly connected to the moving platform. Each of the multiple threaded rods is fitted with a pulley, and the multiple pulleys are synchronously driven by each other through a synchronous belt. The mobile platform is equipped with a central pipe, one side of which is connected to an external grouting device via an L-shaped grouting pipe, and a rotating component is provided on the outside of the central pipe. The rotating component includes a circular block that is movably connected to the mobile platform. A gear ring is also provided on the inner side of the circular block. A gear is meshed on the inner side of the gear ring, and a motor is driven on the gear. The rotating component has at least two bonding components on its outer side, and each bonding component is a three-segment arc-shaped heating tube. The two bonding components are staggered with each other. The arc-shaped heating tubes are connected to the rotating component through an expansion mechanism. The rotation of the rotating component drives the expansion mechanism to push multiple arc-shaped heating tubes outward. The expansion mechanism includes a telescopic rod with its two ends hinged to the fitting component and the circular block, respectively. A sleeve is fitted on the outside of the telescopic rod, and a vertical rod is movably connected to the bottom of the sleeve. The bottom of the vertical rod is fixedly connected to the moving platform. The expansion assembly includes a top cover fixedly connected to a metal pull rope, a base plate at the bottom of the top cover and the top cover and the base plate being connected to each other by a column, a threaded disc movably mounted on the top of the base plate, a gear ring two mounted on the bottom of the threaded disc, a gear three meshing with one side of the gear ring two, and a motor two driving the threaded disc to rotate at the bottom of the gear three, and multiple arc-shaped expansion members mounted on the top of the threaded disc, the multiple arc-shaped expansion members being slidably connected to the top cover and forming a three-jaw chuck-type threaded connection with the threaded disc; The intermediate pipe is equipped with a sealing element inside, which blocks the connection between the L-shaped grouting pipe and the intermediate pipe. Several sliding rods are fixedly connected to the top of the sealing element. The top of the sliding rod extends to the outside of the intermediate pipe and a limit ring is fixed to the top. A second spring is sleeved on the outside of the sliding rod and is located between the limit ring and the top of the intermediate pipe. An auxiliary pipe is fixedly installed on the top cover, and the bottom of the auxiliary pipe passes through the entire expansion assembly and is movably connected to the entire expansion assembly. An auxiliary hole is opened on the auxiliary pipe, and the auxiliary hole is adapted to the L-shaped grouting pipe on one side of the middle pipe. After the auxiliary pipe is inserted into the middle pipe and the sealing element is pushed up, a connection is formed between the auxiliary hole and the L-shaped grouting pipe. A metal block is also provided at one end of the telescopic rod connecting to the bonding component. The metal block is fixedly connected to the bonding component. An electromagnet is provided between one end of the metal block and the telescopic rod. A spring is connected between the electromagnet and the metal block.

2. The grouting device for anti-corrosion cast-in-place piles according to claim 1, characterized in that: The top of the L-shaped grouting pipe is equipped with a grouting hose, and an injection device is connected to the grouting hose.

3. The grouting device for anti-corrosion cast-in-place piles according to claim 2, characterized in that: One of the threaded rods has a driven gear fixedly mounted on its outer side, and a driving gear is meshed with one side of the driven gear. A motor is driven to the bottom of the driving gear.

4. The operation method of the grouting device for anti-corrosion cast-in-place piles according to claim 3, characterized in that: The specific steps are as follows: S1. First, place the device on the anti-corrosion film, and then use external launching and pulling equipment and metal ropes to move the entire device down into the hole to be filled until the bottom. S2. Start the motor two at the bottom of the gear three to drive the threaded disc to rotate. The rotation of the threaded disc will cause multiple arc-shaped expansion parts to expand outward in sync. During the expansion process, the anti-corrosion film will continuously adhere to the inner wall of the hole until it is tightly adhered to the inner wall of the hole, and then the motor two will be turned off. S3. Then start the motor connected to the gear ring drive to drive the circular block to rotate. During the rotation of the circular block, multiple expansion mechanisms will drive the arc heating tubes on multiple bonding components to expand outward synchronously until they are bonded to the inner wall of the hole. After bonding, start motor four to drive multiple threaded rods to rotate until the moving platform and the bonding components, expansion mechanisms and rotating components on the top of the moving platform move upward as a whole. During the upward movement, the expanded bonding components will squeeze the anti-corrosion film to bond to the hole wall and use heating to temporarily plastically fix the squeezed film until it moves to the highest point of the threaded rod. S4. At this time, multiple fitting components are pressed and fixed between the components and the hole wall. Then, multiple arc-shaped expansion components are contracted. Then, external retraction and extension equipment is used to pull the metal rope to move the expansion components upward until they are moved to the bottom of the moving platform. S5. During the upward movement of the expansion component, the auxiliary pipe on the top cover is moved upward until it is inserted into the middle pipe, pushing the seal upward. Finally, when the expansion component moves to the moving platform to cooperate, the auxiliary hole and the L-shaped grouting pipe are connected, so that the injected material is injected into the bottom of the expansion component. Then, the moving platform is moved upward and the above steps are repeated. During the upward movement, the elasticity of the second spring is used to push the seal to automatically close the channel of the L-shaped grouting pipe.

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