A SDG foundation guide pile construction method and equipment

Abstract

The present invention discloses a SDG solid foundation pile guide method and equipment, belonging to the field of building construction technology. The method includes: S1: compacting the foundation; S2: after the foundation is compacted, pre-drilling the ground, the pre-drilling is used for driving prefabricated pipe piles; S3: installing a pile guide device at the pre-drilled hole, the pile guide device is used for positioning the prefabricated pipe piles; S4: lifting the prefabricated pipe piles, using the pile guide device to vertically position the prefabricated pipe piles, and then using a pile driver to slowly drive the prefabricated pipe piles into the pre-drilled holes; S5: after the prefabricated pipe pile driving construction is completed, the pile top of the prefabricated pipe pile is corrected. After the foundation is compacted, the present invention greatly enhances the density and bearing capacity of the foundation, and then uses the hole guide device to guide the prefabricated pipe piles to drive in, and further improves the bearing capacity of the foundation, so that it can adapt to different geological conditions and engineering requirements, and ensure the stability of the foundation to the greatest extent.

Description

Technical Field

[0001] The invention relates to a SDG foundation-fixing pile guide construction method and equipment, belonging to the technical field of building construction. Background Art

[0002] Ground treatment generally refers to engineering and technical measures taken to improve the bearing capacity of the foundation supporting a building or to improve its deformation or permeability properties.

[0003] Existing foundation treatment methods mostly use construction methods such as dynamic compaction, replacement filling, and preloading. However, each method is only applicable to a small number of foundation conditions. A single foundation construction method is not applicable to complex foundation conditions. Therefore, a more stable foundation treatment method is needed to meet the construction requirements under complex foundation conditions. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a SDG foundation pile guide method and equipment, which solves the problem in the prior art that a single foundation construction method cannot be applied to complex foundation conditions.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solution: a SDG foundation guide pile construction method, the construction method comprising:

[0006] S1: compact the foundation;

[0007] S2: After the foundation is compacted, pre-drilling is performed on the ground. The pre-drilled holes are used to drive in prefabricated pipe piles.

[0008] S3: Install the pile guide equipment at the pre-drilled hole, the pile guide equipment is used to position the prefabricated pipe piles;

[0009] S4: Lift the prefabricated pipe pile, use the pile guide equipment to vertically position the prefabricated pipe pile, and then use the pile driver to slowly drive the prefabricated pipe pile into the pre-drilled hole;

[0010] S5: After the prefabricated pipe pile driving construction is completed, the pile top of the prefabricated pipe pile is corrected.

[0011] By adopting the above technical scheme, the foundation is compacted, so that the density and bearing capacity of the foundation are greatly enhanced, and then the prefabricated pipe piles are guided by the hole-guiding equipment to be driven in, and the bearing capacity of the foundation is further improved. This can adapt to different geological conditions and engineering requirements, ensure the stability of the foundation to the greatest extent, and significantly improve the density and bearing capacity of the foundation.

[0012] A pile guide device for an SDG foundation pile guide method, the pile guide device comprising a positioning barrel, a connecting plate, a first splicing block, a second splicing block, a connecting threaded hole, a positioning through hole and a positioning structure, the positioning barrel is a hollow cylindrical structure, the hollow part inside the positioning barrel forms a piling channel, the connecting plate is sleeved and fixed on the end of the positioning barrel facing the pre-drilled hole, the positioning barrel and the connecting plate are coaxially arranged with the pre-drilled hole, the first splicing block and the second splicing block are arranged on the side of the connecting plate facing the foundation, a plurality of first splicing blocks and the second splicing blocks are arranged, the first splicing blocks and the second splicing blocks are alternately connected by mortise and tenon along the circumferential direction of the connecting plate, a plurality of first splicing blocks and the second splicing blocks are connected by mortise and tenon to form a circular ring structure, the first splicing block and the second splicing block slide relative to each other along the axial direction of the positioning barrel to complete the mortise and tenon connection, the connecting plate is respectively connected with the first splicing block The first and second splicing blocks are abutted against the second splicing block to limit relative sliding of the first and second splicing blocks. A connecting threaded hole and a positioning through hole are arranged on the connecting plate and penetrate the connecting plate along the axial direction of the positioning barrel. The connecting threaded hole is aligned with the second splicing block, the positioning through hole is aligned with the first splicing block, the positioning through hole penetrates the first splicing block along the axial direction of the positioning barrel, a positioning column with an end inserted into the foundation is arranged in the positioning through hole, a bolt fastener connecting the connecting plate and the second splicing block is arranged in the connecting threaded hole, a positioning structure is arranged at one end of the positioning barrel away from the connecting plate, a plurality of positioning structures are arranged in a circular array at equal angles along the axis of the positioning barrel, the positioning structure extends into the piling channel and abuts against the outer side of the prefabricated pipe pile, and the positioning structure positions the prefabricated pipe pile in the vertical direction by abutting so that the prefabricated pipe pile is aligned with the axis of the pre-drilled hole.

[0013] The present invention is further configured as follows: the positioning structure includes an adjusting block, an adjusting screw, an abutment wheel, a mounting block, a liquid guiding channel, a joint pipe and an abutment block, the adjusting block radially penetrates the side surface of the positioning barrel along the positioning barrel, one end of the adjusting block extends into the piling channel, the adjusting block is radially slidably connected to the positioning barrel, the adjusting screw is inserted into the adjusting block through the end face of the adjusting block away from the piling channel, the adjusting screw is threadedly connected to the adjusting block, the mounting block is fixed at one end of the adjusting block located in the piling channel, the abutment wheel is rotatably arranged at one end of the mounting block away from the adjusting block, the abutment wheel abuts against the prefabricated pipe pile, the abutment block is fixed on the mounting block and part of the abutment block abuts against the outer curved surface of the abutment wheel, the liquid guiding channel is opened in the adjusting block, one end of the liquid guiding channel extends into the abutment block and penetrates the abutment end of the abutment block and the abutment wheel, the joint pipe is fixed to the outside of the adjusting block, and one end of the joint pipe extends into the adjusting block and communicates with the liquid guiding channel.

[0014] By adopting the above technical scheme, when using the SDG foundation pile guide method, it is necessary to use a pile guide device to position the prefabricated pipe piles. First, a plurality of first splicing blocks and second splicing blocks are alternately mortise and tenon spliced ​​to form a circular ring structure, and then the connecting plate is coaxially aligned with the circular ring structure, and bolt fasteners are screwed into the connecting threaded holes to fix the connecting plate and the circular ring structure, and then the pre-drilled hole and the circular ring structure are aligned to be coaxially arranged, and then the positioning column is inserted into the positioning through hole to fix the connecting plate and the circular ring structure to the foundation to avoid horizontal displacement of the connecting plate and the circular ring structure during construction. The prefabricated pipe pile is inserted into the piling channel and then abutted against the positioning structure. At this time, the abutment wheel in the positioning structure abuts against the prefabricated pipe pile, and the abutment wheel and the prefabricated pipe pile generate radial pressure. When the prefabricated pipe pile is vertically inserted into the pre-drilled hole, friction is generated between the abutment wheel and the prefabricated pipe pile, and the abutment wheel rotates under the action of the friction. The joint pipe is connected to the external liquid supply equipment, and the liquid supply equipment will The lubricating fluid is introduced into the fluid guide channel through the joint pipe, and finally flows to the surface of the abutment wheel through the opening at the connection between the abutment block and the abutment wheel, and then is smeared on the surface of the prefabricated pipe pile by the abutment wheel, thereby reducing the friction force of the subsequent prefabricated pipe pile inserted into the pre-drilled hole, and a plurality of positioning structures limit the horizontal displacement of the prefabricated pipe pile by abutment, so that the prefabricated pipe pile can only slide in the vertical direction, ensuring that the verticality of the prefabricated pipe pile inserted into the pre-drilled hole meets the construction requirements, and the driving accuracy of the prefabricated pipe pile is guaranteed. When the verticality of the prefabricated pipe pile deviates during the driving process, a fixed driving element is set on the outside of the pile guide equipment, so that the driving element is fixed to the adjusting screw on the offset side of the prefabricated pipe pile, and the driving element drives the adjusting screw to rotate. Under the action of the threaded structure, the adjusting screw causes the adjusting block to slide along the axial direction of the adjusting screw, and then adjusts the position of the abutment wheel, so that the pressure of the abutment wheel on the prefabricated pipe pile becomes larger, thereby producing a pressing and straightening effect on the prefabricated pipe pile, and ensuring the verticality of the prefabricated pipe pile inserted into the pre-drilled hole to the greatest extent.

[0015] The present invention is further configured as follows: a telescopic cavity is opened on one side of a plurality of first splicing blocks facing the pre-drilled hole, a telescopic block is arranged in the telescopic cavity for radial sliding along the positioning barrel, a telescopic spring is fixedly connected between one end of the telescopic block located in the telescopic cavity and the inner wall of the telescopic cavity, the telescopic spring provides elastic force along the sliding direction for the telescopic block, one end of the telescopic block facing the pre-drilled hole extends to the opening of the pre-drilled hole and a main expansion plate is fixedly arranged, the main expansion plate extends axially along the positioning barrel into the pre-drilled hole, the main expansion plate fits against the inner wall of the pre-drilled hole, and a first elastic sheet is fixedly connected between adjacent main expansion plates along the circumferential direction of the positioning barrel.

[0016] By adopting the above technical solution, the main expansion plate fits with the inner wall of the pre-drilled hole. When the prefabricated pipe pile is inserted into the pre-drilled hole, the prefabricated pipe pile contacts the main expansion plate first. Since the diameter of the pre-drilled hole is smaller than the outer diameter of the prefabricated pipe pile, the main expansion plate is pressed by the prefabricated pipe pile toward the inner wall of the pre-drilled hole. At this time, the main expansion plate further compacts the soil layer on the inner wall of the pre-drilled hole, and the first elastic sheet of the main expansion plate is stretched and extended during the pressing movement, while the telescopic block retracts into the telescopic cavity, and the telescopic spring is compressed. Since both are elastically connected and movable connections, the main expansion plate will not generate large vibrations when pressed by the prefabricated pipe pile, so that when the prefabricated pipe pile is driven into the pre-drilled hole, the hole wall is compacted and the soil layer at the edge of the pre-drilled hole is prevented from collapsing and falling into the bottom of the hole to affect the driving operation of the prefabricated pipe pile, which is beneficial to improving the construction efficiency of the driving construction of the prefabricated pipe pile.

[0017] The present invention is further configured as follows: a main abutment rod is fixed on one side of the main expansion plate facing the inner wall of the pre-drilled hole, the main abutment rod is in an arc-shaped convex structure facing the inner wall of the pre-drilled hole, a main drainage cavity is provided in the main abutment rod along the axial direction of the positioning barrel, the main drainage cavity penetrates the main abutment rod at one end away from the positioning barrel, an elastic liquid storage bag is fixedly provided at one end of the piling channel facing the pre-drilled hole, the elastic liquid storage bag is filled with liquid, the elastic liquid storage bag is fixedly connected to the main expansion plate, a closed cavity located in the main expansion plate is provided at the connection between the elastic liquid storage bag and the main expansion plate, the closed cavity is connected with the elastic liquid storage bag, two relatively abutting elastic closing sheets are fixedly provided on the inner wall of the closed cavity, the two relatively abutting elastic closing sheets close the connection between the closed cavity and the elastic liquid storage bag, a main intermediate channel is provided in communication with the side of the closed cavity away from the elastic liquid storage bag, and the other end of the main intermediate channel is connected with the main drainage cavity.

[0018] By adopting the above technical solution, the main abutment rod is fixed on the side of the main expansion plate facing the inner wall of the pre-drilled hole. Since the contact surface area between the main abutment rod and the inner wall of the pre-drilled hole is much smaller than the contact surface area between the main expansion plate and the inner wall of the pre-drilled hole, the main expansion plate is easier to move toward the inner wall of the pre-drilled hole when subjected to the pressure of the prefabricated pipe pile. At this time, the main abutment rod can be pressed into the soil layer inside the pre-drilled hole wall. At the same time, the prefabricated pipe pile first abuts against the elastic liquid storage bag when inserted into the pre-drilled hole. Under the action of pressure, the elastic liquid storage bag undergoes elastic deformation and compresses the internal space of the elastic liquid storage bag. At this time, the pressure inside the elastic liquid storage bag increases. After the pressure in the elastic liquid storage bag increases, the elastic sealing sheet separates the elastic liquid storage bag and the closed cavity, and a pressure difference is generated between the closed cavity and the elastic liquid storage bag. Under the action of the pressure difference, the elastic sealing sheet is forced to bend and deform and release the abutment. At this time, the closed cavity and the elastic liquid storage bag are connected, and the liquid in the elastic liquid storage bag enters the closed cavity and is introduced into the main drainage cavity through the main middle channel, and finally flows into the soil layer on the inner wall of the pre-drilled hole from the opening of the main drainage cavity, thereby lubricating the movement path of the main abutment rod and the main expansion plate, making it easier for the main expansion plate and the main abutment rod to be pressed into the inner wall of the pre-drilled hole by the prefabricated pipe pile.

[0019] The present invention is further configured as follows: a plurality of auxiliary structures fixed side by side along the axial direction of the positioning barrel are fixed to one end of the main expansion plate away from the positioning barrel, the auxiliary structures include an elastic expansion plate, a second elastic sheet and an intermediate elastic sheet, an elastic expansion plate is fixed to one end of the intermediate elastic sheet away from the main expansion plate, the elastic expansion plate abuts against the inner wall of the pre-drilled hole, a second elastic sheet is fixed between adjacent elastic expansion plates along the circumferential direction of the positioning barrel, an intermediate elastic sheet in an auxiliary structure is fixedly connected to an elastic expansion plate in an adjacent auxiliary structure facing the positioning barrel, and an intermediate elastic sheet in an auxiliary structure close to the main expansion plate is fixedly connected to the main expansion plate.

[0020] The present invention is further configured as follows: a pressing protrusion block is fixed to a side of the elastic expansion plate away from the inner wall of the pre-drilled hole, a storage cavity is provided in the elastic expansion plate, an auxiliary abutment rod is fixed to the side of the elastic expansion plate facing the inner wall of the pre-drilled hole, the auxiliary abutment rod is an arc-shaped protrusion structure facing the inner wall of the pre-drilled hole, an auxiliary drainage channel is provided in the auxiliary abutment rod, the auxiliary drainage channel penetrates the auxiliary abutment rod along the axial direction of the positioning barrel at one end away from the positioning barrel, and an auxiliary intermediate channel is provided between the end of the auxiliary drainage channel facing the positioning barrel and connected to the storage cavity.

[0021] By adopting the above technical scheme, an auxiliary structure is installed on the side of the main expansion plate away from the positioning barrel, which can further abut and fit the inner wall of the pre-drilled hole in the vertical direction of the pre-drilled hole, so that the elastic expansion plate fills the gap between the prefabricated pipe pile and the inner wall of the pre-drilled hole, thereby reducing the grouting amount during subsequent grouting construction, which is beneficial to improving construction efficiency. At the same time, in the process of the prefabricated pipe pile being driven into the pre-drilled hole, the prefabricated pipe pile first contacts the pressing protrusion block and squeezes the elastic expansion plate. At this time, the elastic expansion plate undergoes elastic deformation under the action of pressure and squeezes the space of the storage cavity. After the space in the storage cavity becomes smaller, the pressure increases. When the storage cavity is filled with liquid, the liquid in the storage cavity can be pressed into the auxiliary drainage channel through the auxiliary intermediate channel, and finally flows into the soil layer from the opening of the auxiliary drainage channel, thereby achieving the purpose of lubricating the movement path of the auxiliary abutment rod and the elastic expansion plate, so that the resistance of the prefabricated pipe pile to be driven into the pre-drilled hole is greatly reduced.

[0022] The present invention is further configured as follows: a recovery chamber is provided in the auxiliary abutment rod, the recovery chamber is located on a side of the auxiliary abutment rod away from the positioning barrel, the recovery chamber extends along the bending direction of the auxiliary abutment rod, and one end of the recovery chamber facing the positioning barrel is connected with the auxiliary drainage channel, an elastic sealing block is slidably arranged in the recovery chamber along the extending direction of the recovery chamber, the end of the elastic sealing block extends into the auxiliary drainage channel and bends toward a through-port direction of the auxiliary drainage channel passing through the auxiliary abutment rod, the bent end of the elastic sealing block extending into the auxiliary drainage channel abuts against the inner wall of the auxiliary drainage channel to close the through-port of the auxiliary drainage channel passing through the auxiliary abutment rod, a pressure spring is fixedly arranged at one end of the elastic sealing block away from the auxiliary drainage channel, the side of the pressure spring away from the elastic sealing block abuts against the inner wall of the recovery chamber, and the pressure spring applies an elastic force toward the auxiliary drainage channel to the elastic sealing block.

[0023] The present invention is further configured as follows: a sliding cavity is provided inside the elastic expansion plate on a side of the storage cavity away from the positioning barrel, an air pressure cavity is provided between the sliding cavity and the storage cavity, the air pressure cavity is communicated with the sliding cavity, a sliding block is provided for sliding in the sliding cavity, an air pressure block is provided for sliding in the air pressure cavity, the sliding block and the air pressure block slide radially along the positioning barrel, a pull rope is fixed on the side of the sliding block away from the axis of the positioning barrel, one end of the pull rope away from the sliding block extends into the recovery cavity and is fixed to one end of the elastic sealing block away from the auxiliary liquid discharge channel, an air guide channel is provided for communication between the storage cavity and the air pressure cavity, the connecting end of the air guide channel and the air pressure cavity is located on the side of the air pressure block away from the axis of the positioning barrel, and the air pressure cavity faces the positioning barrel. A second exhaust hole connected to the pre-drilled hole is provided on one side of the axis, and a first exhaust hole connected to the pre-drilled hole is provided on the side of the sliding cavity toward the axis of the positioning barrel. The air pressure block always forms a closed space with the side of the air pressure cavity away from the second exhaust hole in the complete sliding path, and the closed space is separated from the sliding cavity. A flexible partition layer is fixedly provided in the middle of the storage cavity. The flexible partition layer separates the part of the storage cavity facing the air guide channel from the part of the storage cavity facing the auxiliary middle channel to form two independently sealed spaces. The sealed space on the side of the flexible partition layer facing the auxiliary middle channel is filled with liquid, and the sealed space on the side of the flexible partition layer facing the air guide channel is filled with compressed gas.

[0024] By adopting the above technical scheme, when the elastic expansion plate is subjected to the pressure of the prefabricated pipe pile, the elastic expansion plate undergoes elastic deformation to squeeze the storage cavity and reduce the space of the storage cavity. At this time, the pressure in the two parts of the storage cavity separated by the flexible partition layer increases. At this time, the liquid in the storage cavity near the auxiliary middle channel enters the auxiliary drainage channel through the auxiliary middle channel. The liquid entering the auxiliary drainage channel is blocked by the elastic sealing block and cannot be discharged. As the pressure in the auxiliary drainage channel increases, the bent end of the elastic sealing block is further bent and deformed toward the direction of the soil layer outside the auxiliary drainage channel under the action of pressure. At this time, the elastic sealing block releases the contact with the inner wall of the auxiliary drainage channel, and the liquid in the auxiliary drainage channel can flow out of the auxiliary drainage channel to the soil layer, which can allow the liquid to flow out normally when the liquid flows out of the auxiliary drainage channel. , and avoids the invasion of soil into the auxiliary drainage channel and the blocking of the auxiliary drainage channel, thereby ensuring the normal discharge of the liquid to the greatest extent; and in extreme cases, when the density of the soil layer is relatively high and the curved end of the elastic sealing block is squeezed so that it cannot be deformed, the pressure in the storage chamber is further increased. At this time, the gas on the side of the storage chamber close to the air guide channel enters the air pressure chamber through the air guide channel, and pushes the air pressure block to move in the direction of the second exhaust hole. The air pressure block drives the sliding block to move during the movement. At this time, the sliding block pulls the elastic sealing block into the recovery chamber by pulling the pull rope. At this time, the elastic sealing block cannot close the auxiliary drainage channel, and the liquid in the auxiliary drainage channel can flow out to the soil layer through the opening of the auxiliary drainage channel, thereby avoiding the high soil density affecting the elastic sealing block from being able to deform, and further ensuring that the liquid can flow out smoothly.

[0025] The beneficial effects of the present invention are as follows: after the foundation is compacted, the density and bearing capacity of the foundation are greatly enhanced, and then the prefabricated pipe piles are guided by the hole-guiding equipment to be driven in, and the bearing capacity of the foundation is further improved. This can adapt to different geological conditions and engineering requirements, ensure the stability of the foundation to the greatest extent, and significantly improve the density and bearing capacity of the foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the prefabricated pipe pile when it is inserted into the piling channel in the present invention;

[0028] Figure 3 It is a structural cross-sectional view of the prefabricated pipe pile of the present invention when it is inserted into the piling channel;

[0029] Figure 4 for Figure 3 A magnified view of the structure at center A;

[0030] Figure 5 for Figure 3 A magnified view of the structure at B in the middle;

[0031] Figure 6 for Figure 3 Enlarged view of the structure at C in the middle.

[0032] In the figure: 10, positioning barrel; 11, piling channel; 12, connecting plate; 13, first splicing block; 14, second splicing block; 15, connecting threaded hole; 16, elastic liquid storage bag; 17, prefabricated pile; 18, positioning through hole; 20, adjusting block; 21, adjusting screw; 22, abutting wheel; 23, mounting block; 24, liquid guide channel; 25, joint pipe; 26, abutting block; 30, telescopic block; 31, telescopic cavity; 32, telescopic spring; 33, main expansion plate; 34, first elastic sheet; 35, main abutting rod; 36, main drainage cavity; 37, main Middle channel; 38, elastic sealing piece; 39, sealing cavity; 40, elastic expansion plate; 41, pressing protrusion block; 42, second elastic piece; 43, middle elastic piece; 44, auxiliary abutment rod; 45, storage cavity; 46, flexible partition layer; 47, auxiliary middle channel; 48, auxiliary drainage channel; 49, recovery cavity; 50, elastic sealing block; 51, pressure spring; 52, pull rope; 53, sliding cavity; 54, sliding block; 55, first exhaust hole; 56, air pressure cavity; 57, second exhaust hole; 58, air pressure block; 59, air guide channel. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0034] SDG solid foundation guide pile construction method. This method combines the advantages of strong tamping technology and bored pipe pile construction, and through efficient construction methods, it improves the bearing capacity and stability of the foundation and provides a solid foundation for the superstructure.

[0035] The SDG in the SDG solid foundation guide pile method: S stands for Stable, D stands for Directing, and G stands for Ground / Pile. This abbreviation combines the core characteristics of the method, namely a stable guide pile foundation.

[0036] Solid foundation S: Through the strong tamping technology, the density and stability of the foundation are significantly improved, providing a solid foundation for the building. Guide pile D: Through the hole-guiding equipment, the prefabricated pipe piles are accurately guided to be driven in, ensuring the pile position is accurate and the pile body is vertical, so as to efficiently complete the pile foundation construction.

[0037] The solid foundation guide pile method combines the two technologies of dynamic compaction and bored pipe piles to achieve complementary advantages. Dynamic compaction technology improves the overall performance of the foundation, while bored pipe piles ensure the quality and efficiency of pile foundation construction through precise guidance.

[0038] A SDG foundation guide pile construction method, the construction method comprising:

[0039] S1: Use a dynamic compaction machine to compact the foundation. Through high-energy compaction, the density and bearing capacity of the foundation can be improved. At the same time, the compaction energy and compaction times need to be controlled to avoid excessive damage to the foundation.

[0040] S2: After the foundation is compacted, use the drilling equipment to pre-drill the ground. The pre-drilled holes are used to drive prefabricated pipe piles. During pre-drilling, parameters such as hole diameter, hole depth and verticality need to be strictly controlled to ensure the quality of the hole. During the drilling process, pay attention to the stability of the hole wall and safety protection.

[0041] S3: Install the pile guide equipment at the pre-drilled hole. The pile guide equipment is used to position the prefabricated pipe piles. The pile guide equipment needs to be fixed to the foundation. When installing the pile guide equipment, it needs to be matched and debugged with the verticality of the pre-drilled hole to ensure the verticality of the prefabricated pipe piles during piling. Figure 2 The precast pile 17 shown in ;

[0042] S4: Lift the prefabricated pipe pile, insert the end of the prefabricated pipe pile into the pile guide equipment, and use the pile guide equipment to vertically position the prefabricated pipe pile. Then use the pile driver to slowly drive the prefabricated pipe pile into the pre-drilled hole until the required soil penetration depth is reached. During the pile driving process, observe the driving condition of the pile at any time to ensure that the pile body is not damaged or tilted.

[0043] S5: After the prefabricated pipe pile is driven into the pile, the pile top is corrected to ensure the verticality and horizontality of the pile top. If necessary, a pile cap or connector can be set on the pile top to connect with the upper structure.

[0044] In this way, the foundation is first compacted to greatly enhance its density and bearing capacity. Then, the prefabricated pipe piles are guided by the hole-guiding equipment to be driven in, and the bearing capacity of the foundation is further improved. This can adapt to different geological conditions and engineering requirements, ensure the stability of the foundation to the greatest extent, and significantly improve the density and bearing capacity of the foundation.

[0045] like Figures 1 to 3 and Figure 6As shown, a pile guide device for SDG foundation pile guide method includes a positioning barrel 10, a connecting plate 12, a first splicing block 13, a second splicing block 14, a connecting threaded hole 15, a positioning through hole 18 and a positioning structure. The positioning barrel 10 is a hollow cylindrical structure. The hollow part inside the positioning barrel 10 forms a piling channel 11. The connecting plate 12 is sleeved and fixed on the end of the positioning barrel 10 facing the pre-drilled hole. The positioning barrel 10 and the connecting plate 12 are coaxially arranged with the pre-drilled hole. The connecting block 13 and the second connecting block 14 are arranged on the side of the connecting plate 12 facing the foundation. A plurality of first connecting blocks 13 and second connecting blocks 14 are arranged. The first connecting blocks 13 and second connecting blocks 14 are alternately connected by mortise and tenon along the circumference of the connecting plate 12. A plurality of first connecting blocks 13 and second connecting blocks 14 are connected by mortise and tenon to form a circular ring structure. The first connecting block 13 and second connecting block 14 slide relative to each other along the axial direction of the positioning barrel 10 to complete the mortise and tenon connection. The connecting plate 12 is respectively connected to the first connecting block 13 and the second connecting block 14. A splicing block 13 and a second splicing block 14 abut against each other to limit relative sliding of the first splicing block 13 and the second splicing block 14. A connecting threaded hole 15 and a positioning through hole 18 are provided on the connecting plate 12 and penetrate the connecting plate 12 along the axial direction of the positioning barrel 10. The connecting threaded hole 15 is aligned with the second splicing block 14. The positioning through hole 18 is aligned with the first splicing block 13. The positioning through hole 18 penetrates the first splicing block 13 along the axial direction of the positioning barrel 10. A positioning column with an end inserted into the foundation is provided in the positioning through hole 18. A bolt fastener connecting the connecting plate 12 and the second splicing block 14 is provided in the connecting threaded hole 15. The positioning structure is provided at one end of the positioning barrel 10 away from the connecting plate 12. The positioning structure is provided with a plurality of positioning structures and is arranged in a circular array at equal angles along the axis of the positioning barrel 10. The positioning structure extends into the piling channel 11 and abuts against the outer side surface of the prefabricated pipe pile. The positioning structure positions the prefabricated pipe pile in the vertical direction by abutting so that the prefabricated pipe pile is aligned with the axis of the pre-drilled hole. The positioning structure includes an adjusting block 20, an adjusting screw 21, an abutting wheel 22, a mounting block 23, a liquid guide channel 24, a joint pipe 25 and an abutting block 26. The adjusting block 20 penetrates the side of the positioning barrel 10 along the radial direction of the positioning barrel 10. One end of the adjusting block 20 extends into the piling channel 11. The adjusting block 20 is slidably connected with the positioning barrel 10 along the radial direction. The adjusting screw 21 is inserted into the adjusting block 20 through the end face of the adjusting block 20 away from the piling channel 11. The adjusting screw 21 is threadedly connected with the adjusting block 20. The mounting block 23 is fixed to the adjusting block 20 at the position of the piling. At one end of the channel 11, the abutment wheel 22 is rotatably set at the end of the mounting block 23 away from the adjusting block 20, the abutment wheel 22 abuts against the prefabricated pipe pile, the abutment block 26 is fixed on the mounting block 23 and the abutment block 26 partially abuts against the outer curved surface of the abutment wheel 22, the liquid guide channel 24 is opened in the adjusting block 20, one end of the liquid guide channel 24 extends into the abutment block 26 and penetrates the abutment end of the abutment block 26 and the abutment wheel 22, the joint pipe 25 is fixed on the outside of the adjusting block 20, and one end of the joint pipe 25 extends into the adjusting block 20 and communicates with the liquid guide channel 24.The portion of the joint pipe 25 located outside the adjustment block 20 can be communicated with an external fluid supply device, and the external fluid supply device supplies lubricating fluid into the joint pipe 25 .

[0046] like Figure 3 and Figure 5 As shown, a telescopic cavity 31 is opened on one side of the several first splicing blocks 13 facing the pre-drilled hole, and a telescopic block 30 is arranged in the telescopic cavity 31 for radial sliding along the positioning barrel 10. A telescopic spring 32 is fixedly connected between one end of the telescopic block 30 located in the telescopic cavity 31 and the inner wall of the telescopic cavity 31. The telescopic spring 32 provides elastic force along the sliding direction for the telescopic block 30. The end of the telescopic block 30 facing the pre-drilled hole extends to the opening of the pre-drilled hole and is fixedly provided with a main expansion plate 33. The main expansion plate 33 extends axially along the positioning barrel 10 into the pre-drilled hole, and the main expansion plate 33 is fitted with the inner wall of the pre-drilled hole. A first elastic sheet 34 is fixedly connected between adjacent main expansion plates 33 along the circumferential direction of the positioning barrel 10. A main abutment rod 35 is fixed on one side of the main expansion plate 33 facing the inner wall of the pre-drilled hole. The main abutment rod 35 is an arc-shaped convex structure facing the inner wall of the pre-drilled hole. A main drainage cavity 36 is opened in the main abutment rod 35 along the axial direction of the positioning barrel 10. The main drainage cavity 36 penetrates the main abutment rod 35 at one end away from the positioning barrel 10. An elastic liquid storage bag 16 is fixedly arranged at one end of the piling channel 11 facing the pre-drilled hole. The elastic liquid storage bag 16 is filled with liquid. The elastic liquid storage bag 16 is fixedly connected to the main expansion plate 33. A closed cavity 39 located inside the main expansion plate 33 is provided at the connection between the elastic liquid storage bag 16 and the main expansion plate 33. The closed cavity 39 is connected to the elastic liquid storage bag 16. Two relatively abutting elastic sealing pieces 38 are fixedly provided on the inner wall of the closed cavity 39. The two relatively abutting elastic sealing pieces 38 seal the connection between the closed cavity 39 and the elastic liquid storage bag 16. A main intermediate channel 37 is provided on one side of the closed cavity 39 away from the elastic liquid storage bag 16. The other end of the main intermediate channel 37 is connected to the main drainage cavity 36. The liquid in the elastic liquid storage bag 16 includes, but is not limited to, lubricating liquid, cooling liquid, clean water, etc.

[0047] like Figures 1 to 4As shown, a plurality of auxiliary structures fixed side by side along the axial direction of the positioning barrel 10 are fixed to the end of the main expansion plate 33 away from the positioning barrel 10, and the auxiliary structures include an elastic expansion plate 40, a second elastic sheet 42 and an intermediate elastic sheet 43. The elastic expansion plate 40 is fixed to the end of the intermediate elastic sheet 43 away from the main expansion plate 33, and the elastic expansion plate 40 abuts against the inner wall of the pre-drilled hole. The second elastic sheet 42 is fixedly arranged between adjacent elastic expansion plates 40 along the circumferential direction of the positioning barrel 10. The intermediate elastic sheet 43 in one auxiliary structure is fixedly connected to the elastic expansion plate 40 in the adjacent auxiliary structure facing the positioning barrel 10, and the intermediate elastic sheet 43 in the auxiliary structure close to the main expansion plate 33 is fixedly connected to the main expansion plate 33. A pressing protrusion 41 is fixed to the side of the elastic expansion plate 40 away from the inner wall of the pre-drilled hole, and a storage cavity 45 is provided in the elastic expansion plate 40. The part of the elastic expansion plate 40 where the storage cavity 45 is arranged is an elastic deformable structure facing the axis of the pre-drilled hole, and the elastic expansion plate 40 retracts into the storage cavity 45 after receiving pressure. An auxiliary abutment rod 44 is fixed to the side of the elastic expansion plate 40 facing the inner wall of the pre-drilled hole. The auxiliary abutment rod 44 is an arc-shaped protrusion structure facing the inner wall of the pre-drilled hole. An auxiliary drainage channel 48 is opened in the auxiliary abutment rod 44. The auxiliary drainage channel 48 penetrates the auxiliary abutment rod 44 axially along the positioning barrel 10 at one end away from the positioning barrel 10. An auxiliary intermediate channel 47 is provided between the end of the auxiliary drainage channel 48 facing the positioning barrel 10 and connected to the storage cavity 45.

[0048] like Figure 3 to Figure 4As shown, a recovery chamber 49 is provided in the auxiliary abutment rod 44, and the recovery chamber 49 is located on the side of the auxiliary abutment rod 44 away from the positioning barrel 10. The recovery chamber 49 extends along the bending direction of the auxiliary abutment rod 44, and one end of the recovery chamber 49 toward the positioning barrel 10 is connected with the auxiliary drainage channel 48. An elastic sealing block 50 is slidably provided in the recovery chamber 49 along the extension direction of the recovery chamber 49, and the end of the elastic sealing block 50 extends into the auxiliary drainage channel 48 and penetrates the auxiliary abutment rod 44 toward the auxiliary drainage channel 48. 4, the bent end of the elastic sealing block 50 extends into the auxiliary drainage channel 48 and abuts against the inner wall of the auxiliary drainage channel 48 to close the through-opening of the auxiliary abutting rod 44 through which the auxiliary drainage channel 48 passes. A pressure spring 51 is fixedly provided at one end of the elastic sealing block 50 away from the auxiliary drainage channel 48, and a side of the pressure spring 51 away from the elastic sealing block 50 abuts against the inner wall of the recovery chamber 49, and the pressure spring 51 applies an elastic force to the elastic sealing block 50 in the direction of the auxiliary drainage channel 48. A sliding chamber 53 is provided inside the elastic expansion plate 40 on the side of the storage chamber 45 away from the positioning barrel 10, and an air pressure chamber 56 is provided between the sliding chamber 53 and the storage chamber 45. The air pressure chamber 56 is communicated with the sliding chamber 53, and a sliding block 54 is slidably arranged in the sliding chamber 53, and an air pressure block 58 is slidably arranged in the air pressure chamber 56. The sliding block 54 and the air pressure block 58 slide radially along the positioning barrel 10, and a pull rope 52 is fixed on the side of the sliding block 54 away from the axis of the positioning barrel 10, and one end of the pull rope 52 away from the sliding block 54 extends into the recovery chamber 49 and is fixed to the end of the elastic sealing block 50 away from the auxiliary drainage channel 48, and an air guide channel 59 is provided in communication between the storage chamber 45 and the air pressure chamber 56, and the connecting end of the air guide channel 59 and the air pressure chamber 56 is located on the side of the air pressure block 58 away from the axis of the positioning barrel 10. A second exhaust hole 57 connected to the pre-drilled hole is provided through the side of the cylinder 56 facing the axis of the positioning barrel 10, and a first exhaust hole 55 connected to the pre-drilled hole is provided through the side of the sliding chamber 53 facing the axis of the positioning barrel 10. The air pressure block 58 always forms a closed space with the side of the air pressure chamber 56 away from the second exhaust hole 57 in the complete sliding path, and the closed space is separated from the sliding chamber 53. A flexible partition layer 46 is fixedly provided in the middle of the storage chamber 45. The flexible partition layer 46 separates the part of the storage chamber 45 facing the air guide channel 59 from the part of the storage chamber 45 facing the auxiliary intermediate channel 47 to form two independently sealed sealed spaces. The sealed space on the side of the flexible partition layer 46 facing the auxiliary intermediate channel 47 is filled with liquid, and the sealed space on the side of the flexible partition layer 46 facing the air guide channel 59 is filled with compressed gas. The liquid in the storage chamber 45 is of the same type as that in the elastic liquid storage bag 16, including but not limited to lubricating liquid, coolant, clean water, etc.

[0049] When using the SDG foundation pile guide method, it is necessary to use a pile guide device to position the prefabricated pipe piles. First, a plurality of first splicing blocks 13 and second splicing blocks 14 are alternately spliced ​​with mortise and tenon joints to form a circular ring structure. Then, the connecting plate 12 is coaxially aligned with the circular ring structure, and bolt fasteners are screwed into the connecting threaded holes 15 to fix the connecting plate 12 with the circular ring structure. Then, the pre-drilled holes and the circular ring structure are aligned to be coaxially arranged, and then the positioning column is inserted into the positioning through hole 18 to align the connecting plate 12 with the circular ring structure. The foundation is fixed to avoid horizontal displacement of the connecting plate 12 and the annular structure during the construction process. The prefabricated pipe pile is inserted into the piling channel 11 and abuts against the positioning structure. At this time, the abutting wheel 22 in the positioning structure abuts against the prefabricated pipe pile. The abutting wheel 22 and the prefabricated pipe pile generate radial pressure. The prefabricated pipe pile is vertically inserted into the pre-drilled hole. Friction is generated between the abutting wheel 22 and the prefabricated pipe pile and the abutting wheel 22 rotates under the action of the friction. The joint pipe 25 is connected to the external liquid supply device. The liquid supply device guides the lubricating liquid into the liquid guide channel 24 through the joint pipe 25. Finally, the abutting wheel 22 is connected to the prefabricated pipe pile by the external liquid supply device. The opening at the connection between the connecting block 26 and the abutment wheel 22 flows to the surface of the abutment wheel 22, and then is smeared on the surface of the prefabricated pipe pile by the abutment wheel 22, thereby reducing the friction force of the subsequent prefabricated pipe pile inserted into the pre-drilled hole, and a number of positioning structures limit the horizontal displacement of the prefabricated pipe pile by abutment, so that the prefabricated pipe pile can only slide in the vertical direction, ensuring that the verticality of the prefabricated pipe pile inserted into the pre-drilled hole meets the construction requirements and ensures the driving accuracy of the prefabricated pipe pile. When the verticality of the prefabricated pipe pile deviates during the driving process, a fixed driving element is set up outside the pile guide equipment. The driving element can be directly fixed on the connecting plate 12 using a support frame, or the support frame can be connected to a fixed object outside the pile guide equipment, so that the driving element is fixed to the adjusting screw 21 on the offset side of the prefabricated pipe pile. The driving element drives the adjusting screw 21 to rotate, and the adjusting screw 21 causes the adjusting block 20 to slide along the axial direction of the adjusting screw 21 under the action of the threaded structure, thereby adjusting the position of the abutment wheel 22, so that the pressure of the abutment wheel 22 on the prefabricated pipe pile becomes greater, thereby producing a pressing and straightening effect on the prefabricated pipe pile, thereby ensuring the verticality of the prefabricated pipe pile inserted into the pre-drilled hole to the greatest extent.

[0050] The main expansion plate 33 is fitted with the inner wall of the pre-drilled hole. When the prefabricated pipe pile is inserted into the pre-drilled hole, the prefabricated pipe pile contacts the main expansion plate 33 first. Since the diameter of the pre-drilled hole is slightly smaller than the outer diameter of the prefabricated pipe pile, the main expansion plate 33 is pressed by the prefabricated pipe pile toward the inner wall of the pre-drilled hole, that is, a plurality of main expansion plates 33 are separated and expanded by the prefabricated pipe pile in a direction away from the axis of the pre-drilled hole. At this time, the main expansion plate 33 further compacts the soil layer on the inner wall of the pre-drilled hole, and the first elastic sheet 34 is stretched during the pressing movement of the main expansion plate 33. The telescopic block 30 is extended, and at the same time, the telescopic block 30 is retracted into the telescopic cavity 31, and the telescopic spring 32 is compressed. Since the telescopic block 30, the main expansion plate 33 and the first elastic sheet 34 are all elastically connected and movably connected, the main expansion plate 33 will not generate a large vibration when being expanded and pressed by the prefabricated pipe pile. When the prefabricated pipe pile is driven into the pre-drilled hole, the hole wall is compacted and the soil layer at the edge of the pre-drilled hole is prevented from collapsing and falling into the bottom of the hole to affect the driving operation of the prefabricated pipe pile, which is beneficial to improving the construction efficiency of the driving construction of the prefabricated pipe pile.

[0051] A main abutment rod 35 is fixed on the side of the main expansion plate 33 facing the inner wall of the pre-drilled hole. Since the contact surface area between the main abutment rod 35 and the inner wall of the pre-drilled hole is much smaller than the contact surface area between the main expansion plate 33 and the inner wall of the pre-drilled hole, the main expansion plate 33 is easier to move toward the inner wall of the pre-drilled hole when subjected to the pressure of the prefabricated pipe pile. At this time, the main abutment rod 35 can be pressed into the soil layer inside the pre-drilled hole wall. At the same time, the prefabricated pipe pile first abuts against the elastic liquid storage bag 16 when inserted into the pre-drilled hole. Under the action of pressure, the elastic liquid storage bag 16 is elastically deformed and the internal space of the elastic liquid storage bag 16 is compressed. At this time, the pressure in the elastic liquid storage bag 16 increases. Afterwards, since the elastic sealing piece 38 separates the elastic liquid storage bag 16 and the sealing chamber 39, a pressure difference is generated between the sealing chamber 39 and the elastic liquid storage bag 16. Under the action of the pressure difference, the elastic sealing piece 38 is forced to bend and deform and release the abutment. At this time, the sealing chamber 39 and the elastic liquid storage bag 16 are connected, and the liquid in the elastic liquid storage bag 16 enters the sealing chamber 39 and is introduced into the main drainage chamber 36 through the main intermediate channel 37, and finally flows into the soil layer on the inner wall of the pre-drilled hole from the opening of the main drainage chamber 36, thereby lubricating the movement path of the main abutment rod 35 and the main expansion plate 33, so that the main expansion plate 33 and the main abutment rod 35 are more easily pressed into the inner wall of the pre-drilled hole by the prefabricated pipe piles.

[0052] An auxiliary structure is installed on the side of the main expansion plate 33 away from the positioning barrel 10, which can further abut against the inner wall of the pre-drilled hole in the vertical direction of the pre-drilled hole, so that the elastic expansion plate 40 fills the gap between the prefabricated pipe pile and the inner wall of the pre-drilled hole, thereby reducing the grouting amount during subsequent grouting construction, which is beneficial to improving construction efficiency. At the same time, in the process of the prefabricated pipe pile being driven into the pre-drilled hole, the prefabricated pipe pile first contacts with the pressing protrusion block 41 and squeezes the elastic expansion plate 40. At this time, the elastic expansion plate 40 is elastically deformed under the action of pressure and squeezes the space of the storage cavity 45, storing When the space in the cavity 45 becomes smaller, the pressure increases. When the storage cavity 45 is filled with liquid, the liquid in the storage cavity 45 can be pressed into the auxiliary drainage channel 48 through the auxiliary intermediate channel 47, and finally flows into the soil layer from the opening of the auxiliary drainage channel 48, thereby achieving the purpose of lubricating the movement path of the auxiliary abutment rod 44 and the elastic expansion plate 40, so that the auxiliary abutment rod 44 and the elastic expansion plate 40 are pressed into the soil layer more smoothly. At the same time, the second elastic sheet 42 and the middle elastic sheet 43 undergo elastic extension deformation, and the resistance of the prefabricated pipe pile to be driven into the pre-drilled hole is also greatly reduced. When the prefabricated pipe pile changes its verticality and tilts, the elastic expansion plate 40 can always be in close contact with the outer surface of the prefabricated pipe pile under the elastic force of the second elastic sheet 42, and the middle elastic sheet 43 undergoes elastic deformation to ensure that a plurality of elastic expansion plates 40 tilt with the prefabricated pipe pile, so that the elastic expansion plate 40 always moves with the prefabricated pipe pile, and when the prefabricated pipe pile is driven into the soil layer and a small deviation occurs in the verticality, the prefabricated pipe pile can be effectively prevented from tilting and puncturing and damaging the elastic expansion plate 40.

[0053] When the main expansion plate 33 and the main abutment rod 35 as well as the elastic expansion plate 40 and the auxiliary abutment rod 44 are subjected to the expansion pressure of the prefabricated pipe pile inserted into the pre-drilled hole, it is difficult for the main expansion plate 33 and the elastic expansion plate 40 to be squeezed toward the inner wall of the pre-drilled hole due to the soil layer. At this time, the friction between the surface of the prefabricated pipe pile and the main expansion plate 33 and the elastic expansion plate 40 is relatively large and friction heat is generated. Heat is also generated after the main expansion plate 33 and the elastic expansion plate 40 rub against the soil layer. By infiltrating liquid into the soil layer, the friction between the main expansion plate 33 and the elastic expansion plate 40 and the soil layer can be reduced, and the liquid can absorb the heat of the main expansion plate 33 and the elastic expansion plate 40 themselves, thereby preventing the main expansion plate 33 and the elastic expansion plate 40 from being damaged due to excessive heat collection.

[0054] When the elastic expansion plate 40 is subjected to the pressure of the prefabricated pipe pile, the elastic expansion plate 40 undergoes elastic deformation to squeeze the storage chamber 45, making the storage chamber 45 space smaller. At this time, the pressures in the two parts of the storage chamber 45 separated by the flexible partition layer 46 both increase. At this time, the liquid in the storage chamber 45 located on the side close to the auxiliary intermediate channel 47 enters the auxiliary drainage channel 48 through the auxiliary intermediate channel 47. The liquid entering the auxiliary drainage channel 48 is blocked by the elastic sealing block 50 and cannot be discharged. As the pressure in the auxiliary drainage channel 48 increases, the bent end of the elastic sealing block 50 is further bent and deformed toward the direction of the external soil layer of the auxiliary drainage channel 48 under the action of pressure. At this time, the elastic sealing block 50 releases the contact with the inner wall of the auxiliary drainage channel 48, and the liquid in the auxiliary drainage channel 48 can flow out of the auxiliary drainage channel 48 to the soil layer, which can not only make the liquid flow out normally when it flows out of the auxiliary drainage channel 48, but also avoid mud. Soil invades the auxiliary drainage channel 48 and blocks the auxiliary drainage channel 48, thereby ensuring the normal discharge of the liquid to the greatest extent; and in extreme cases, when the density of the soil layer is relatively high and squeezes the curved end of the elastic sealing block 50 so that it cannot be deformed, the pressure in the storage chamber 45 further increases. At this time, the gas on the side of the storage chamber 45 close to the air guide channel 59 enters the air pressure chamber 56 through the air guide channel 59, and pushes the air pressure block 58 to move toward the second exhaust hole 57. The air pressure block 58 drives the sliding block 54 to move during the movement. At this time, the sliding block 54 pulls the elastic sealing block 50 into the recovery chamber 49 by pulling the pull rope 52. At this time, the elastic sealing block 50 cannot close the auxiliary drainage channel 48, and the liquid in the auxiliary drainage channel 48 can flow out to the soil layer through the opening of the auxiliary drainage channel 48, thereby avoiding the high soil density affecting the elastic sealing block 50 from being deformed, further ensuring that the liquid can flow out smoothly.

[0055] After the prefabricated pipe pile is completely driven into the pre-drilled hole, the bolt fastener is unscrewed and the positioning column is pulled out of the soil layer, so that the connecting plate 12 and the positioning barrel 10 are separated and disassembled from the annular structure, and then the first splicing block 13 and the second splicing block 14 are moved in a direction away from the axis of the pre-drilled hole, that is, moved radially along the pre-drilled hole, so that the first splicing block 13 and the second splicing block 14 are separated from the mortise and tenon connection. At this time, the first splicing block 13 and the second splicing block 14 are disconnected from the main expansion plate 33, and the telescopic block 30 is removed from the telescopic cavity 31. When the first splicing block 13 and the second splicing block 14 are disassembled, concrete mortar is poured into the gap between the first elastic sheet 34 and the inner wall of the pre-drilled hole. At this time, since the gap between the prefabricated pipe pile and the inner wall of the pre-drilled hole is filled by the main expansion plate 33 and the elastic expansion plate 40, the amount of concrete mortar required is less, which is beneficial to reduce the amount of concrete mortar poured, improves construction efficiency, and is beneficial to improve the environmental level of the construction site.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A SDG foundation pile construction method, characterized in that: The method comprises: S1: compact the foundation; S2: After the foundation is compacted, pre-drilling is performed on the ground. The pre-drilled holes are used to drive in prefabricated pipe piles. S3: Install the pile guide equipment at the pre-drilled hole, which is used to position the prefabricated pipe piles; S4: Lift the prefabricated pipe pile, use the pile guide equipment to vertically position the prefabricated pipe pile, and then use the pile driver to slowly drive the prefabricated pipe pile into the pre-drilled hole; S5: After the prefabricated pipe pile driving construction is completed, the pile top of the prefabricated pipe pile is corrected; The pile guide device comprises a positioning barrel (10), a connecting plate (12), a first splicing block (13), a second splicing block (14), a connecting threaded hole (15), a positioning through hole (18) and a positioning structure. The positioning barrel (10) is a hollow cylindrical structure. The hollow portion inside the positioning barrel (10) forms a pile driving channel (11). The connecting plate (12) is sleeved and fixed on the end of the positioning barrel (10) facing the pre-drilled hole. The positioning barrel (10) and the connecting plate (12) are coaxially arranged with the pre-drilled hole. The first splicing block (13) and the second splicing block (14) are connected to each other. 14) is arranged on a side of the connecting plate (12) facing the foundation, a plurality of first splicing blocks (13) and second splicing blocks (14) are arranged, the first splicing blocks (13) and the second splicing blocks (14) are alternately connected by mortise and tenon joints along the circumference of the connecting plate (12), a plurality of first splicing blocks (13) and second splicing blocks (14) are connected by mortise and tenon joints to form a circular ring structure, the first splicing blocks (13) and the second splicing blocks (14) slide relative to each other along the axial direction of the positioning barrel (10) to complete the mortise and tenon joint connection, the connecting plate (12) is respectively connected to the first splicing blocks (1 3) and the second splicing block (14) abut against the first splicing block (13) and the second splicing block (14) to limit relative sliding between the first splicing block (13) and the second splicing block (14), the connecting threaded hole (15) and the positioning through hole (18) are provided on the connecting plate (12) and penetrate the connecting plate (12) along the axial direction of the positioning barrel (10), the connecting threaded hole (15) is aligned with the second splicing block (14), the positioning through hole (18) is aligned with the first splicing block (13), the positioning through hole (18) penetrates the first splicing block (13) along the axial direction of the positioning barrel (10), and a positioning through hole (18) is provided in the A positioning column having an end inserted into the foundation, a bolt fastener for connecting the connecting plate (12) and the second splicing block (14) is arranged in the connecting threaded hole (15), a positioning structure is arranged at one end of the positioning barrel (10) away from the connecting plate (12), a plurality of positioning structures are arranged in a circular array at equal angles along the axis of the positioning barrel (10), the positioning structure extends into the piling channel (11) and abuts against the outer side surface of the prefabricated pipe pile, and the positioning structure positions the prefabricated pipe pile in a vertical direction by abutting so that the prefabricated pipe pile is aligned with the axis of the pre-drilled hole; A telescopic cavity (31) is provided on a side of the plurality of first splicing blocks (13) facing the pre-drilled hole. A telescopic block (30) is provided in the telescopic cavity (31) to slide radially along the positioning barrel (10). A telescopic spring (32) is fixedly connected between one end of the telescopic block (30) located in the telescopic cavity (31) and the inner wall of the telescopic cavity (31). The telescopic spring (32) provides elastic force for the telescopic block (30) along the sliding direction. One end of the telescopic block (30) facing the pre-drilled hole extends to the opening of the pre-drilled hole and is fixedly provided with a main expansion plate (33). The main expansion plate (33) extends axially along the positioning barrel (10) into the pre-drilled hole. The main expansion plate (33) is fitted with the inner wall of the pre-drilled hole. A first elastic sheet (34) is fixedly connected between adjacent main expansion plates (33) along the circumferential direction of the positioning barrel (10).

2. The SDG foundation pile guiding method according to claim 1 is characterized in that: The positioning structure comprises an adjusting block (20), an adjusting screw (21), an abutting wheel (22), a mounting block (23), a liquid guide channel (24), a joint pipe (25) and an abutting block (26); the adjusting block (20) penetrates the side of the positioning barrel (10) along the radial direction of the positioning barrel (10); one end of the adjusting block (20) extends into the piling channel (11); the adjusting block (20) is slidably connected with the positioning barrel (10) along the radial direction; the adjusting screw (21) is inserted into the adjusting block (20) through the end surface of the adjusting block (20) away from the piling channel (11); the adjusting screw (21) is threadedly connected with the adjusting block (20); the mounting block (23) is fixed to the adjusting block (20) at a position At one end of the piling channel (11), an abutting wheel (22) is rotatably arranged at one end of the mounting block (23) away from the adjusting block (20), the abutting wheel (22) abuts against the prefabricated pipe pile, the abutting block (26) is fixed on the mounting block (23) and a portion of the abutting block (26) abuts against the outer curved surface of the abutting wheel (22), a liquid guide channel (24) is opened in the adjusting block (20), one end of the liquid guide channel (24) extends into the abutting block (26) and penetrates the abutting end of the abutting block (26) and the abutting wheel (22), and a joint pipe (25) is fixed outside the adjusting block (20), one end of the joint pipe (25) extends into the adjusting block (20) and communicates with the liquid guide channel (24).

3. The SDG foundation pile guiding method according to claim 1 is characterized in that: A main abutment rod (35) is fixed on one side of the main expansion plate (33) facing the inner wall of the pre-drilled hole. The main abutment rod (35) is in an arc-shaped convex structure facing the inner wall of the pre-drilled hole. A main drainage cavity (36) is provided in the main abutment rod (35) along the axial direction of the positioning barrel (10). The end of the main drainage cavity (36) away from the positioning barrel (10) passes through the main abutment rod (35). An elastic liquid storage bag (16) is fixedly provided in the end of the piling channel (11) facing the pre-drilled hole. The elastic liquid storage bag (16) is filled with liquid. The elastic liquid storage bag (16) is fixedly connected to the main expansion plate (33). A closed cavity (39) located inside the main expansion plate (33) is provided at the connection between the liquid bag (16) and the main expansion plate (33). The closed cavity (39) is in communication with the elastic liquid storage bag (16). Two elastic closing pieces (38) that are in contact with each other are fixedly provided on the inner wall of the closed cavity (39). The two elastic closing pieces (38) that are in contact with each other close the connection between the closed cavity (39) and the elastic liquid storage bag (16). A main intermediate channel (37) is provided on one side of the closed cavity (39) away from the elastic liquid storage bag (16). The other end of the main intermediate channel (37) is in communication with the main drainage cavity (36).

4. The SDG foundation pile guiding method according to claim 1, characterized in that: A plurality of auxiliary structures fixed in parallel along the axial direction of the positioning barrel (10) are fixed to one end of the main expansion plate (33) away from the positioning barrel (10), the auxiliary structures comprising an elastic expansion plate (40), a second elastic sheet (42) and an intermediate elastic sheet (43); an elastic expansion plate (40) is fixed to one end of the intermediate elastic sheet (43) away from the main expansion plate (33); the elastic expansion plate (40) abuts against the inner wall of the pre-drilled hole; a second elastic sheet (42) is fixedly arranged between adjacent elastic expansion plates (40) along the circumferential direction of the positioning barrel (10); an intermediate elastic sheet (43) in an auxiliary structure is fixedly connected to an elastic expansion plate (40) in an adjacent auxiliary structure facing the positioning barrel (10); and an intermediate elastic sheet (43) in an auxiliary structure close to the main expansion plate (33) is fixedly connected to the main expansion plate (33).

5. The SDG foundation pile guide construction method according to claim 4, characterized in that: A pressing protrusion (41) is fixed to a side of the elastic expansion plate (40) away from the inner wall of the pre-drilled hole, a storage cavity (45) is provided in the elastic expansion plate (40), an auxiliary abutment rod (44) is fixed to a side of the elastic expansion plate (40) facing the inner wall of the pre-drilled hole, the auxiliary abutment rod (44) is in an arc-shaped protrusion structure facing the inner wall of the pre-drilled hole, an auxiliary liquid discharge channel (48) is provided in the auxiliary abutment rod (44), an end of the auxiliary liquid discharge channel (48) away from the positioning barrel (10) penetrates the auxiliary abutment rod (44) along the axial direction of the positioning barrel (10), and an auxiliary intermediate channel (47) is provided between the end of the auxiliary liquid discharge channel (48) facing the positioning barrel (10) and the storage cavity (45).

6. The SDG foundation pile guide construction method according to claim 4, characterized in that: A recovery chamber (49) is provided in the auxiliary abutment rod (44). The recovery chamber (49) is located on a side of the auxiliary abutment rod (44) away from the positioning barrel (10). The recovery chamber (49) extends along the bending direction of the auxiliary abutment rod (44). One end of the recovery chamber (49) facing the positioning barrel (10) is communicated with the auxiliary liquid discharge channel (48). An elastic sealing block (50) is slidably provided in the recovery chamber (49) along the extending direction of the recovery chamber (49). The end of the elastic sealing block (50) extends into the auxiliary liquid discharge channel (48) and penetrates the auxiliary abutment rod (44) toward the auxiliary liquid discharge channel (48). The elastic sealing block (50) is bent in the direction of the through-opening of the auxiliary drainage channel (44), the bent end of the elastic sealing block (50) extending into the auxiliary drainage channel (48) abuts against the inner wall of the auxiliary drainage channel (48) to close the through-opening of the auxiliary abutting rod (44), and a pressure spring (51) is fixedly arranged at one end of the elastic sealing block (50) away from the auxiliary drainage channel (48), and the side of the pressure spring (51) away from the elastic sealing block (50) abuts against the inner wall of the recovery chamber (49), and the pressure spring (51) applies an elastic force to the elastic sealing block (50) in the direction of the auxiliary drainage channel (48).

7. The SDG foundation pile guide construction method according to claim 4, characterized in that: A sliding cavity (53) is provided inside the elastic expansion plate (40) on a side of the storage cavity (45) away from the positioning barrel (10); an air pressure cavity (56) is provided between the sliding cavity (53) and the storage cavity (45); the air pressure cavity (56) is communicated with the sliding cavity (53); a sliding block (54) is slidably provided in the sliding cavity (53); an air pressure block (58) is slidably provided in the air pressure cavity (56); the sliding block (54) and the air pressure block (58) are slidably provided along the radial direction of the positioning barrel (10) The sliding block (54) is movable, a pull rope (52) is fixed on the side of the sliding block (54) away from the axis of the positioning barrel (10), one end of the pull rope (52) away from the sliding block (54) extends into the recovery chamber (49) and is fixed to the end of the elastic sealing block (50) away from the auxiliary drainage channel (48), an air guide channel (59) is provided between the storage chamber (45) and the air pressure chamber (56), and the connecting end of the air guide channel (59) and the air pressure chamber (56) is located at the air pressure block (58) away from the positioning barrel (10 ) on one side of the axis of the positioning barrel (10), a second exhaust hole (57) communicating with the pre-drilled hole is provided through the air pressure chamber (56) on the side facing the axis of the positioning barrel (10), a first exhaust hole (55) communicating with the pre-drilled hole is provided through the sliding chamber (53) on the side facing the axis of the positioning barrel (10), the air pressure block (58) always forms a closed space with the side of the air pressure chamber (56) away from the second exhaust hole (57) in the complete sliding path, and the closed space is separated from the sliding chamber (53), a flexible partition layer (46) is fixedly provided in the middle of the storage chamber (45), the flexible partition layer (46) separates the part of the storage chamber (45) facing the air guide channel (59) from the part of the storage chamber (45) facing the auxiliary intermediate channel (47) to form two independently sealed sealed spaces, the sealed space on the side of the flexible partition layer (46) facing the auxiliary intermediate channel (47) is filled with liquid, and the sealed space on the side of the flexible partition layer (46) facing the air guide channel (59) is filled with compressed gas.

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