A reusable pipe pile multi-depth grouting device and its installation and use method

Abstract

The application discloses a reusable pipe pile multi-depth grouting device and a mounting and using method thereof. The device comprises an automatic connection grouting device, a multi-directional buried grouting head and a fixing frame. The automatic connection grouting device is fixed on the fixing frame and can be lifted up and down in the pipe pile and has the function of automatically connecting and grouting the buried grouting head. The fixing frame is positioned at the pipe pile opening and can be partially rotated and has the functions of adjusting the falling depth of the automatic connection device and the direction. The multi-directional buried grouting head is buried in the pipe pile, has a short length, can be positioned and can be placed in multiple directions in advance and has the function of being connected with the automatic connection device for grouting. The application can realize multi-depth grouting, the grouting pipeline is arranged simply and conveniently and the grouting pipeline can be recycled.

Description

Technical Field

[0001] This invention relates to the field of post-grouting of pipe piles, specifically to a reusable multi-depth grouting device for pipe piles and its installation and usage methods. Background Technology

[0002] Prestressed concrete pipe piles are characterized by high pile strength, high construction efficiency, and reliable quality. However, in actual engineering projects, weak soil layers often exist around the pile, such as soft soil on the pile side and poor bearing strata at the pile tip. This prevents the pipe pile's bearing capacity from being fully utilized, thus failing to achieve the expected engineering economics. Post-grouting is commonly used in engineering to address the pile's bearing capacity issues, such as by grouting the pile side and bottom to improve side friction and end resistance. Currently available grouting technologies are mostly designed for bored piles, while pipe piles are generally centrifugally formed and require segmented driving and connection during construction. The grouting process for bored piles is difficult to directly apply, meaning the application of post-grouting for pipe piles is relatively limited. Furthermore, when a single grouting pipe is installed inside the pipe, grouting efficiency is low, and uniform grouting around the pile is difficult. When multiple grouting pipes are installed inside the pipe, not only is the pipe layout complex and reduces the efficiency of pipe pile construction, but a large number of grouting pipes are also non-recyclable, resulting in high material consumption and increased construction costs.

[0003] Therefore, there is an urgent need for a post-grouting device for pipe piles that can achieve multi-depth grouting while having a simple and convenient grouting pipeline layout and recyclable pipelines, so as to improve the construction quality and efficiency of post-grouting of pipe piles. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reusable multi-depth grouting device for pipe piles and its installation and use method, which can achieve multi-depth grouting with simple and convenient grouting pipe layout and recyclable grouting pipes.

[0005] This invention provides the following technical solution:

[0006] A reusable multi-depth grouting device for pipe piles consists of an automatic connection grouting device, a multi-directional embedded grouting head, and a fixing frame. It is composed of an outer shell, an automatic connection function device, a pipeline device, and a liquid delivery platform. The automatic connection grouting device is fixed on the fixing frame and can be lifted up and down in the pipe pile. It has the function of automatically connecting with the embedded grouting head for grouting.

[0007] The fixing frame is positioned at the pipe pile opening and can be partially rotated, thus having the function of adjusting the falling depth and position of the automatic connecting device.

[0008] The multi-directional embedded grouting head is embedded in the pipe pile. It is short in length, can be positioned, can be pre-placed in multiple directions, and has the function of connecting with an automatic connection device for grouting.

[0009] Furthermore, the outer casing device comprises positioning steel bars, a cross cavity, connecting columns, a cross tray, and a fixing sleeve; the positioning steel bars are fixed to the top surface of the cross cavity, the connecting columns connect and fix the cross cavity and the cross tray, and the two are in the same orientation; the fixing sleeve is located on the cross tray. The cross cavity is hollow inside and is divided into a central compartment, a middle compartment, and an outer compartment by partitions to install pipes with different functions, wherein the bottom of the outer compartment is provided with a slide rail and a moving channel for the hollow push rod;

[0010] The top surface of the cross-shaped cavity has fixing ports for different pipes: a fixing port for a dilute hydrochloric acid pipe, a fixing port for a grouting pipe, a fixing port for an air inlet pipe, and an electrical wire hole, to fix different pipelines. A camera with a light source is arranged on the cross-shaped cavity, divided into an upper camera with a light source and a lower camera with a light source, depending on their position. The images from the cameras with light sources can be observed on the operating table.

[0011] Furthermore, the automatic connection device consists of an electric push rod and an electromagnetic inflation head; the electric push rod comprises an electric sliding button, a hollow push rod, and a red light emitting device. One end of the hollow push rod passes through the moving channel and is connected to the electric sliding button, while the other end is fixed to the electromagnet. The hollow push rod slides on the slide rail after being energized by the electric sliding button, achieving the pushing and retraction operations. The red light emitting device is fixed to the hollow push rod and can emit a conspicuous red light within a localized area.

[0012] The electromagnetic inflation head consists of an electromagnet and an air bladder. The inner ring of the electromagnet is connected to the air bladder, and both ends of the air bladder are connected to the elastic grouting pipe. A long anti-jamming strip is attached to the lower end face of the electromagnet to prevent it from getting stuck and unable to retract after being pushed. When energized, the electromagnet becomes magnetic and attracts and connects to the iron sheet. The air bladder is connected to the inflation pipe to inflate and expand, thereby sealing the connection between the elastic grouting pipe and the buried grouting pipe tightly.

[0013] Furthermore, the pipeline device consists of a dilute hydrochloric acid pipe, a lowering grouting pipe, an air inflation pipe, an electrical wire, and a flexible grouting pipe. The pipeline device can be fixed in a fixed port on the top surface of the cross-shaped cavity, with sufficient construction length reserved during construction. The dilute hydrochloric acid pipe, lowering grouting pipe, air inflation pipe, and flexible grouting pipe are connected to an infusion platform, which has the function of injecting various solutions. A one-way valve is installed in the dilute hydrochloric acid pipe, which is connected to the flexible grouting pipe through a fixed sleeve. A one-way valve is also installed in the lowering grouting pipe, which is connected to the flexible grouting pipe through a fixed sleeve. The air inflation pipe is connected to an air bladder through the cross-shaped cavity. The flexible grouting pipe is a flexible hose with high elasticity; its diameter is larger than that of the buried grouting pipe when connected to the electromagnetic inflation head. In addition, the pipeline device and the one-way valve are made of corrosion-resistant materials. One end of the electrical wire is connected to the operating platform, and the other end is connected to the equipment requiring power, such as an electric slider, a red light emitter, an electromagnet, or a camera with a light source. The operating platform has the function of operating various electrical devices.

[0014] Furthermore, the multi-directional embedded grouting head is composed of an embedded grouting pipe, a one-way valve, an iron sheet, an aluminum block, an aluminum block sleeve, and a red light filter plate;

[0015] The one-way valve is installed in the buried grouting pipe. The iron plate is nested at the end of the buried grouting pipe closest to the pile, and the aluminum block sleeve is nested at the end of the buried grouting pipe closest to the soil. The red light filter plate is installed on the iron plate and can filter out the red light emitted by the red light emitting device. This means that the elastic grouting pipe and the buried grouting pipe are at the same horizontal position. After adjusting the position of the automatic connection function device, the electromagnetic air-filling head can be pushed out for connection grouting. The aluminum block sleeve is a trumpet-shaped sleeve, nested on the buried grouting pipe, with the aluminum block placed at its trumpet opening. The aluminum block protects the buried grouting pipe during pile construction and can be dissolved by reacting with dilute hydrochloric acid solution.

[0016] Furthermore, the fixing frame consists of a support, a fixed plate, an adjustable latch, and a rotating plate. The fixed plate is fixedly connected to the support, and the rotating plate is located on the fixed plate and can rotate relative to the fixed plate. The adjustable latch is embedded in the rotating plate, and its diameter can be adjusted to fix or loosen the positioning steel bar.

[0017] An installation method for a reusable multi-depth grouting device for pipe piles includes the following steps:

[0018] Install a one-way valve, an iron block with a red light filter plate, an aluminum block sleeve, and an aluminum block on the buried grouting pipe to obtain the installed multi-directional buried grouting head;

[0019] The installed multi-directional embedded grouting head is placed in different directions, fixed with steel wire, and then concrete is poured to obtain precast pipe piles.

[0020] Piling hole drilling;

[0021] After the pile location is marked out and the pile driver is in place, it is lifted and fed with piles, and the pipe piles are driven in and connected.

[0022] Install and fix the fixing frame at the top of the pile to ensure that the center of the rotating plate is located at the center of the pipe pile;

[0023] The automatic connection grouting device is fixed on the fixed frame by positioning steel bars;

[0024] After connecting the pipeline equipment, check the imaging status of the upper and lower cameras with light sources using observation instruments to see if they are working properly.

[0025] Turn on the power, start the red light emitting device, and the installation is complete.

[0026] A method for using a reusable multi-depth grouting device for pipe piles includes the following steps:

[0027] The adjustable bayonet is lowered to automatically connect the grouting device into the pipe pile. Simultaneously, a camera with a light source (below) observes the localized area of ​​red light emitted by the red light emitting device onto the pipe pile wall. When a non-red light area appears due to filtering by the red light filter plate, and this area...

[0028] Stop lowering when the area is in the middle position, and tighten the adjustable clamp to fix the automatic connection grouting device;

[0029] Rotate the rotating plate so that the non-red light area is located at the center of the local red light area;

[0030] Power the electromagnet through the control panel and operate the electric push rod to push out the electromagnetic inflation head. When the electric push rod stops pushing, operate the infusion table to inflate the air bag.

[0031] Operate the infusion station and inject an appropriate amount of dilute hydrochloric acid solution through the dilute hydrochloric acid tube. Wait several minutes to allow the dilute hydrochloric acid solution to dissolve the aluminum block embedded in the grouting head.

[0032] Operate the infusion station to inject grouting fluid through the lowered grouting pipe;

[0033] When pressurization and grouting can no longer be continued, stop grouting, de-energize the electromagnet via the control panel, and operate the electric push rod to retract the electromagnetic air charging head;

[0034] Repeat the steps for the lower grouting layer;

[0035] After grouting of each layer of the pipe pile is completed, it is automatically retracted and connected.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] 1. Automatic grouting connection can be achieved. This invention uses a camera to observe and a red light positioning device to position the automatic grouting device. It uses an electric push rod to push and an electromagnet to attract to automatically connect the lowered grouting pipe and the buried grouting pipe. An inflatable airbag is used to wrap the lowered grouting pipe and the buried grouting pipe to ensure the grouting is airtight, thereby achieving the purpose of automatic connection and grouting of the grouting device.

[0038] 2. The grouting pipe can be recycled and reused. The automatic grouting device connects to the grouting pipe embedded in the pipe pile for grouting. After grouting is completed, the connection is disconnected and the device is moved to the next construction site or retrieved for storage. This allows for multiple uses and reduces material consumption.

[0039] 3. Achieves uniform grouting at multiple depths while maintaining a simple grouting pipeline layout, without affecting the construction of the pipe pile. The automatic connection grouting device can move up and down inside the pipe pile by retracting and extending the fixed reinforcing bars and grouting pipeline. Only the grouting head needs to be embedded at the location where grouting is required inside the pipe pile, without the need for additional grouting pipelines, which greatly simplifies the layout of the grouting pipelines inside the pipe pile and does not affect the construction efficiency of the pipe pile. Attached Figure Description

[0040] Figure 1: Lowering of the automatic grouting device

[0041] Figure 2: Enlarged view of Figure 1

[0042] Figure 3: Cross-sectional view AA in Figure 1

[0043] Figure 4: Connection between the automatic grouting device and the embedded grouting pipe

[0044] Figure 5: Enlarged view of Figure 4, Figure 3

[0045] Figure 6: Grouting reinforcement of the upper part of the pipe pile

[0046] Figure 7: Grouting reinforcement of pipe piles completed

[0047] Figure 8: Front view of the automatic connection grouting device

[0048] Figure 9: Top view of the automatic connection device

[0049] Figure 10: Cross-sectional view BB in Figure 8

[0050] Figure 11: Cross-sectional view CC in Figure 8

[0051] Figure 12: Cross-sectional view DD in Figure 9

[0052] Figure 13: Enlarged view of Figure 12

[0053] Figure 14: Top view of the fixed plate

[0054] In the diagram: 1. Dilute hydrochloric acid pipe; 2. Lowering grouting pipe; 2-1. Grouting fluid; 3. Air inflator pipe; 4. Electrical wiring hole; 5. Cross-shaped cavity; 5-1. Partition plate; 5-2. Central compartment; 5-3. Middle compartment; 5-4. Outer compartment; 6. Electric sliding knob; 7. Slide rail; 7-1. Moving channel; 8. One-way valve; 9. Hollow push rod; 10. Red light emitting device; 10-1. Red light filter plate; 11. Electromagnet; 11-1. Anti-jamming strip; 12. Airbag; 13. Elastic grouting pipe; 14. Cross-shaped tray; 14-1. Fixed pipe sleeve; 15-1. With light source 15-2 Camera with light source (bottom); 16 Positioning steel bar; 17 Connecting column; 18 Limiting plate; 19 Fixing frame; 19-1 Support; 19-2 Fixing plate; 19-3 Adjustable bayonet; 19-4 Rotating plate; 20 Operating table; 21 Infusion table; 22 Automatic grouting device; 23 Pipe pile; 24 Embedded grouting head; 24-1 Embedded grouting pipe; 25 Pile shoe; 26 Wire; 27 Iron block; 28 Aluminum block; 29 Aluminum block sleeve; 30 Electromagnetic air inflator; 31 Electric push rod. Detailed Implementation

[0055] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0056] It should be noted that in the description of this invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and do not require that this invention must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0057] As shown in Figure 1, the automatic connection grouting device 22 consists of an outer shell, an automatic connection function device, a pipeline device, and an infusion platform 21.

[0058] As shown in Figures 8, 9, 10, 11, and 12, the outer casing device consists of a positioning steel bar 16, a cross-shaped cavity 5, a connecting column 17, a cross-shaped tray 14, and a fixing sleeve 14-1. The positioning steel bar 16 is fixed to the top surface of the cross-shaped cavity 5. The connecting column 17 connects and fixes the cross-shaped cavity 5 and the cross-shaped tray 14, and the two are in the same orientation. The fixing sleeve 14-1 is located on the cross-shaped tray 14. The cross-shaped cavity 5 is hollow inside and is divided into a central compartment 5-2, a middle compartment 5-3, and an outer compartment 5-4 by a partition 5-1 to install pipes with different functions. The bottom of the outer compartment 5-4 is provided with a slide rail 7 and a moving channel 7-1 for the hollow push rod 9. The top surface of the cross-shaped cavity 5 has fixing ports for different pipes: a dilute hydrochloric acid pipe fixing port 1-1, a lower grouting pipe fixing port 2-1, an air inlet pipe fixing port 3-1, and an electrical wire hole 4, to fix different pipelines. A camera with a light source is arranged on the cross-shaped cavity 5, and according to its position, it is divided into a camera with a light source (upper) 15-1 and a camera with a light source (lower) 15-2. The images from the cameras with light sources can be observed on the operating table 20.

[0059] As shown in Figures 12 and 13, the automatic connection device consists of an electric push rod 31 and an electromagnetic inflation head 30. The electric push rod 31 comprises an electric sliding button 6, a hollow push rod 9, and a red light emitting device 10. One end of the hollow push rod 9 passes through the moving channel 7-1 and connects to the electric sliding button 6, while the other end is fixed to an electromagnet 11. When energized by the electric sliding button 6, the hollow push rod 9 slides on the slide rail 7 to achieve pushing and retraction operations. The red light emitting device 10 is fixed to the hollow push rod 9 and can emit a conspicuous red light within a localized area. The electromagnetic inflation head 30 consists of an electromagnet 11 and an air bladder 12. The inner ring of the electromagnet 11 is connected to the air bladder 12, and both ends of the air bladder 12 are connected to the elastic grouting pipe 13. A long anti-jamming strip 11-1 is connected to the lower end face of the electromagnet 11 to prevent the electromagnet from getting stuck after being pushed and unable to retract. When the electromagnet 11 is energized, it becomes magnetic and is attracted and connected to the iron sheet 27. The airbag 12 is connected to the inflation tube 3 to achieve inflation and expansion, thereby sealing the connection between the elastic grouting tube 13 and the buried grouting tube 24-1.

[0060] As shown in Figures 1, 9, 12, and 13, the pipeline device consists of a dilute hydrochloric acid pipe 1, a lowering grouting pipe 2, an air inflation pipe 3, an electrical wire 26, and an elastic grouting pipe 13. These components can be fixed in the fixing ports (1-1, 2-1, 3-1, 4) on the top surface of the cross-shaped cavity 5, with sufficient construction length reserved during construction. The dilute hydrochloric acid pipe 1, lowering grouting pipe 2, air inflation pipe 3, and elastic grouting pipe 13 are connected to the infusion platform 21, which has the function of injecting various solutions. A one-way valve 8 is installed in the dilute hydrochloric acid pipe 1, which is connected to the elastic grouting pipe 13 through a fixing sleeve 14-1. A one-way valve 8 is also installed in the lowering grouting pipe 2, which is connected to the elastic grouting pipe 13 through a fixing sleeve 14-1. The air inflation pipe 3 is connected to the airbag 12 through the cross-shaped cavity 5. The elastic grouting pipe 13 is a flexible hose with high elasticity, and its diameter when connected to the electromagnetic inflation head is larger than that of the buried grouting pipe 24-1. Furthermore, the pipeline assembly and one-way valves are made of corrosion-resistant materials. One end of the wire 26 is connected to the operating console 20, and the other end is connected to the equipment requiring power, such as the electric sliding button 6, the red light emitting device 10, the electromagnet 11, and the cameras 15-1 and 15-2 with light sources. The operating console has the function of operating various electrical devices.

[0061] As shown in Figures 2, 3, and 8, the multi-directional embedded grouting head consists of an embedded grouting pipe 24-1, a one-way valve 8, an iron plate 27, an aluminum block 28, an aluminum block sleeve 29, and a red light filter plate 10-1. The one-way valve is located within the embedded grouting pipe 24-1. The iron plate 27 is nested within the embedded grouting pipe 24-1 at one end near the inside of the pipe pile. The aluminum block sleeve 29 is nested within the embedded grouting pipe 24-1 at the end near the soil. The red light filter plate 10-1 is mounted on the iron plate 27 and filters out the red light emitted by the red light emitting device 10. This means that the elastic grouting pipe 13 and the embedded grouting pipe 24-1 are at the same horizontal level. After adjusting the orientation of the automatic connection device, the electromagnetic inflation head can be pushed out for grouting connection. The aluminum block sleeve 29 is a trumpet-shaped sleeve nested within the embedded grouting pipe 24-1, with the aluminum block 28 placed at its trumpet opening. The aluminum block 28 serves to protect the buried grouting pipe 24-1 during the construction of the pipe pile, and can be dissolved by reacting with dilute hydrochloric acid solution.

[0062] As shown in Figures 1 and 14, the fixing frame 19 consists of a bracket 19-1, a fixed plate 19-2, an adjustable latch 19-3, and a rotating plate 19-4. The fixed plate 19-2 is fixedly connected to the bracket 19-1, and the rotating plate 19-4 is located on the fixed plate 19-2 and can rotate relative to the fixed plate 19-2. The adjustable latch 19-3 is embedded in the rotating plate 19-4, and its diameter can be adjusted to fix or loosen the positioning steel bar 16.

[0063] An installation method for a reusable multi-depth grouting device for pipe piles includes the following steps:

[0064] Step 1: Install a one-way valve 8, an iron block with a red light filter plate 10-1, an aluminum block sleeve 29, and an aluminum block 28 on the buried grouting pipe 24-1 to obtain the installed multi-directional buried grouting head;

[0065] Step 2: Place the installed multi-directional embedded grouting head in different positions, fix it with steel wire, and then pour concrete to obtain precast pipe pile 23.

[0066] Step 3: Drilling the pile holes;

[0067] Step 4: Pile location layout. After the pile driver is in place, it is lifted and fed with piles to drive the pipe pile 23 into place and connect it.

[0068] Step 5: Install and fix the fixing frame 19 at the top of the pile, ensuring that the center of the rotating plate 19-4 is located at the center of the pipe pile;

[0069] Step 6: Fix the automatic grouting device 22 to the fixing frame 19 using the positioning steel bar 16;

[0070] Step 7: Connect the pipeline device and check the imaging status of the upper and lower cameras 15-1 and 15-2 with light sources using the observation instrument 22 to see if they are in good condition.

[0071] Step 8: Turn on the power and start the red light emitting device 10. The installation is now complete.

[0072] A method for using a reusable multi-depth grouting device for pipe piles includes the following steps:

[0073] Step 1: Loosen the adjustable latch 19-3 and lower the automatic connection grouting device 22 into the pipe pile 23. At the same time, observe the local area of ​​red light emitted by the red light emitting device 10 onto the pipe pile wall using the camera with light source (bottom) 15-2. When a non-red light area appears due to the filtering of the red light filter plate 10-1 and the area is in the middle position, stop lowering and tighten the adjustable latch 19-3 to fix the automatic connection grouting device 22.

[0074] Step 2: Rotate the rotating plate 19-4 so that the non-red light area is located at the center of the local red light area;

[0075] Step 3: Power the electromagnet 11 through the operating table 20, and operate the electric push rod 31 to push out the electromagnetic inflation head 30. When the electric push rod stops pushing, operate the infusion table 21 to inflate the air bag.

[0076] Step 4: Operate the infusion station and input an appropriate amount of dilute hydrochloric acid solution through the dilute hydrochloric acid tube 1. Wait for several minutes to allow the dilute hydrochloric acid solution to dissolve the aluminum block 28 embedded in the grouting head 24.

[0077] Step 5: Operate the infusion station and inject grouting fluid 2-1 through the lowered grouting pipe 2;

[0078] Step 6: When grouting can no longer be pressurized, stop grouting, de-energize electromagnet 11 through operating panel 20, and operate electric push rod 31 to retract electromagnetic air charging head 30;

[0079] Step 7: Repeat steps 1-6 for the lower layer grouting;

[0080] Step 8: After grouting of each layer of pipe pile 23 is completed, retract the automatic connection grouting device, move the fixed frame 19 to the next pipe pile that needs grouting, and repeat steps 1-7 for grouting.

[0081] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A reusable multi-depth grouting device for pipe piles, characterized in that, Includes automatic connection grouting device, multi-directional embedded grouting head, and fixing frame: The automatic connection grouting device is fixed on the fixed frame and can be lifted up and down in the pipe pile. It has the function of automatically connecting with the embedded grouting head for grouting. It consists of an outer shell device, an automatic connection function device, a pipeline device, and a liquid delivery platform. The fixing frame is positioned at the pipe pile opening and can be partially rotated, thus having the function of adjusting the descent depth and location of the automatic connection grouting device. The multi-directional embedded grouting head is embedded in the pipe pile. It is short in length, can be positioned, can be pre-placed in multiple directions, and has the function of connecting and grouting with an automatic grouting device. The automatic connection function device consists of an electric push rod and an electromagnetic inflation head; The electric push rod consists of an electric sliding button, a hollow push rod, and a red light emitting device. One end of the hollow push rod passes through the moving channel and is connected to the electric sliding button, while the other end is fixed to the electromagnet. The hollow push rod slides on the slide rail after being energized by the electric sliding button to achieve the pushing and retraction operations. The red light emitting device is fixed on the hollow push rod and can emit conspicuous red light in a local area; The electromagnetic inflation head consists of an electromagnet and an air bladder, wherein the inner ring of the electromagnet is connected to the air bladder, and both ends of the air bladder are connected to the elastic grouting pipe. The lower end face of the electromagnet is connected to a long anti-jamming strip to prevent the electromagnet from getting stuck after being pushed and unable to retract. When the electromagnet is energized, it becomes magnetic and thus attracts and connects with the iron sheet. The airbag is connected to the inflation tube to achieve inflation and expansion, thereby sealing the connection between the elastic grouting pipe and the buried grouting pipe tightly.

2. A reusable multi-depth grouting device for pipe piles according to claim 1, characterized in that, The outer casing consists of positioning steel bars, a cross cavity, connecting columns, a cross tray, and a fixing sleeve; The positioning steel bar is fixed on the top surface of the cross cavity, the connecting column connects and fixes the cross cavity and the cross tray, and the two are in the same position. The fixing sleeve is located on the cross tray. The interior of the cross-shaped cavity is hollow and divided into a central compartment, a middle compartment, and an outer compartment by a partition to install pipes with different functions. The bottom of the outer compartment is equipped with a slide rail and a channel for the movement of the hollow push rod. The top surface of the cross-shaped cavity has fixing ports for different pipes: a fixing port for a dilute hydrochloric acid pipe, a fixing port for a grouting pipe, a fixing port for an air filling pipe, and an electrical wire hole, to fix different pipelines; a camera with a light source is arranged on the cross-shaped cavity, which is divided into an upper camera with a light source and a lower camera with a light source according to its position, and the image of the camera with a light source can be observed on the operating table.

3. The reusable multi-depth grouting device for pipe piles according to claim 2, characterized in that, The pipeline device consists of a dilute hydrochloric acid pipe, a lower grouting pipe, an air inlet pipe, an electrical wire, and a flexible grouting pipe; the pipeline device is fixed in the fixing port on the top surface of the cross cavity, and sufficient construction length will be reserved during construction; The dilute hydrochloric acid tube, the lower grouting tube, the air inflator tube, and the flexible grouting tube are connected to the infusion station, which has the function of injecting various solutions. The dilute hydrochloric acid pipe is equipped with a one-way valve, which is connected to the elastic grouting pipe through a fixed pipe sleeve. The lowering grouting pipe is equipped with a second one-way valve and is connected to the elastic grouting pipe through a fixed sleeve; the inflation pipe is connected to the air bladder through a cross cavity. The elastic grouting pipe is a flexible hose with high elasticity, and its diameter when connected to the electromagnetic air inflator is larger than that of the buried grouting pipe; in addition, the pipeline device, one-way valve one, and one-way valve two are all made of corrosion-resistant materials. One end of the power cord is connected to the control panel, and the other end is connected to the electric slider, red light emitter, electromagnet, and camera with light source. The control panel has the function of operating various electrical devices.

4. The reusable multi-depth grouting device for pipe piles according to claim 3, characterized in that, The multi-directional embedded grouting head consists of an embedded grouting pipe, a one-way valve, an iron sheet, an aluminum block, an aluminum block sleeve, and a red light filter plate. The one-way valve is installed in the buried grouting pipe, the iron sheet is nested in the end of the buried grouting pipe near the inside of the pipe pile, and the aluminum block sleeve is nested in the end of the buried grouting pipe near the soil. The red light filter plate is set on the iron sheet and can filter out the red light emitted by the red light emitting device. At this time, it means that the elastic grouting pipe and the buried grouting pipe are at the same horizontal position. After adjusting the position of the automatic connection function device, the electromagnetic air-filling head can be pushed out for connection grouting. The aluminum block sleeve is a trumpet-shaped sleeve that is nested on the buried grouting pipe, with the aluminum block placed at its trumpet opening. The aluminum block serves to protect the buried grouting pipe during the construction of the pipe pile and can be dissolved by reacting with dilute hydrochloric acid solution.

5. A reusable multi-depth grouting device for pipe piles according to claim 4, characterized in that, The fixing frame consists of a bracket, a fixed plate, an adjustable latch, and a rotating plate; the fixed plate is fixedly connected to the bracket, and the rotating plate is located on the fixed plate and can rotate relative to the fixed plate; the adjustable latch is embedded in the rotating plate and can adjust the diameter of the latch to fix or loosen the positioning steel bar.

6. The installation method of a reusable multi-depth grouting device for pipe piles according to claim 5, characterized in that, Includes the following steps: Install a one-way valve, an iron block with a red light filter plate, an aluminum block sleeve, and an aluminum block on the buried grouting pipe to obtain the installed multi-directional buried grouting head; The installed multi-directional embedded grouting head is placed in different directions, fixed with steel wire, and then concrete is poured to obtain precast pipe piles. Piling hole drilling; After the pile location is marked out and the pile driver is in place, it is lifted and fed into the pile, and the pipe pile is driven in and connected. The fixing frame is installed and fixed at the top of the pile to ensure that the center of the rotating plate is located at the center of the pipe pile. The automatic connection grouting device is fixed on the fixed frame by positioning steel bars; After connecting the pipeline device, check the imaging status of the upper and lower cameras with light sources using observation instruments to see if they are working properly; Turn on the power, start the red light emitting device, and the installation is complete.

7. The method of using a reusable multi-depth grouting device for pipe piles according to claim 5, characterized in that, Includes the following steps: Loosen the adjustable latch and lower the automatic connection grouting device into the pipe pile. At the same time, observe the local area of ​​red light emitted by the red light emitting device onto the pipe pile wall using a camera with a light source. When a non-red light area appears due to the red light filter plate and the area is in the middle position, stop lowering and tighten the adjustable latch to fix the automatic connection grouting device. Rotate the rotating plate so that the non-red light area is located at the center of the local red light area; Power the electromagnet through the control panel and operate the electric push rod to push out the electromagnetic inflation head. When the electric push rod stops pushing, operate the infusion table to inflate the air bag. Operate the infusion station and inject an appropriate amount of dilute hydrochloric acid solution through the dilute hydrochloric acid tube. Wait several minutes to allow the dilute hydrochloric acid solution to dissolve the aluminum block embedded in the grouting head. Operate the infusion station to inject grouting fluid through the lowered grouting pipe; When pressurization and grouting can no longer be continued, stop grouting, de-energize the electromagnet via the control panel, and operate the electric push rod to retract the electromagnetic air charging head; Repeat the steps for the lower grouting layer; After grouting of each layer of the pipe pile is completed, it is automatically retracted and connected.

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