Detachable dynamic reinforcement precast pile structure and gradient unloading method thereof

Abstract

The invention relates to the technical field of pile foundation construction, in particular to a detachable dynamic reinforcement precast pile structure and a gradient unloading method thereof.The detachable dynamic reinforcement precast pile structure comprises a pile column, the pile column comprises a concrete structure, a first steel bar and a hollow pipe, and the first steel bar and the hollow pipe are embedded into the concrete structure; the first connecting flange is connected to the upper end of the pile; and the second connecting flange is connected to the lower end of the pile. The precast pile structure is provided with two reinforcement structures, one reinforcement structure is the main reinforcement arranged in the concrete structure, the other reinforcement structure is the temporary reinforcement arranged outside the concrete structure, and the temporary reinforcement is flexibly and detachably connected through the flange structures located at the upper end and the lower end of the concrete structure. And part or all of the temporary reinforcements are dismantled at the construction ending stage, through flexible configuration of the main reinforcements and the temporary reinforcements, the full-life-cycle immobilization mode of a traditional reinforcement system is broken through, and the demand for on-demand dynamic configuration of prefabricated pile reinforcements is met.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation construction, in particular to a detachable dynamic reinforced prefabricated pile structure and a gradient unloading method thereof. Background Art

[0002] Precast piles are widely used due to their high construction efficiency and controllable quality. Precast piles are manufactured in factories or on-site from various materials and in various forms (such as wood, concrete square piles, prestressed concrete pipe piles, and steel piles). These piles are driven, pressed, or vibrated into the soil using pile driving equipment. Prestressed concrete pipe piles offer high strength and strong compressive and flexural bearing capacity, making them widely used in construction projects. Their use of high-strength concrete and prestressed tendons effectively improves the piles' load-bearing capacity and crack resistance.

[0003] However, the reinforcement design for prestressed concrete piles is primarily based on the maximum stress requirements during the construction phase, including those encountered during lifting, transportation, and pile driving. Research has shown that during construction, transient loads such as lifting impact and pile driving resistance often reach 2 to 3 times the pile's normal operating capacity, necessitating the design of reinforcement based on these peak loads. Consequently, this reinforcement pattern not only wastes steel but also significantly increases the cost of pile foundation projects. Summary of the Invention

[0004] In view of the technical problems existing in the prior art of precast piles, the first aspect of the present invention provides a detachable dynamic reinforced precast pile structure, comprising:

[0005] A pile, the pile comprising a concrete structure and a first steel bar and a hollow tube embedded in the concrete structure;

[0006] a first connecting flange connected to the upper end of the pile;

[0007] a second connecting flange connected to the lower end of the pile;

[0008] a plurality of first connecting components detachably connected to the inner side of the first connecting flange;

[0009] a plurality of second connecting members detachably connected to the inner side of the second flange;

[0010] a plurality of second steel bars, each of the second steel bars being connected to the first connecting member and the second connecting member at a corresponding position;

[0011] Wherein, the first connecting flange is provided with a first locking ring, the second connecting flange is provided with a second locking ring, the first connecting component is detachably connected to the first locking ring, and the second connecting component is detachably connected to the second locking ring;

[0012] A locking component is provided inside each of the first locking ring and the second locking ring. The locking component has a locked position and an unlocked position. When the locking component is in the locked position, the first connecting component is relatively fixed to the first locking ring, and the second connecting component is relatively fixed to the second locking ring. When the locking component is in the unlocked position, the first connecting component is separated from the first locking ring, and the second connecting component is separated from the second locking ring.

[0013] The empty tube is connected to the first locking ring and the second locking ring, and is used to fill the first locking ring and the second locking ring with pressure medium to change the position state of the locking component, so that it switches from a locked position to an unlocked position.

[0014] Preferably, the first connecting component is plug-connected to the first locking ring, and the plug-in direction of the first connecting component and the first locking ring is perpendicular to the axis direction of the pile column; the second connecting component is plug-connected to the second locking ring, and the plug-in direction of the second connecting component and the second locking ring is perpendicular to the axis direction of the pile column.

[0015] Preferably, the first locking ring and the second locking ring have the same structure, and a hydraulic chamber is constructed inside the first locking ring and the second locking ring, the upper end of the hydraulic chamber is connected to the liquid inlet channel, and the lower end is connected to the liquid outlet channel, and the locking component includes a piston and a push rod fixed to each other in the hydraulic chamber, the push rod is located on the first side of the piston, and the liquid inlet channel and the liquid outlet channel are located on the second side of the piston.

[0016] Preferably, the inner sides of the first locking ring and the second locking ring are provided with slots, and the first connecting component or the second connecting component can be inserted into the slots. When the piston is set so that the pressure on the second side is greater than that on the first side, the push rod is pushed to disengage the first connecting component or the second connecting component from the slots.

[0017] Preferably, the first connecting component and the second connecting component both include a steel bar fixing part and an insertion part, the steel bar fixing part is provided with at least one socket, the second steel bar can be inserted into the socket and fixed to the steel bar fixing part by bolts, and the insertion part can be inserted into the slot.

[0018] Preferably, a raised snap-fit structure is provided below the first connecting component, and a snap-fit hole cooperating with the snap-fit structure is provided at the upper end of the second connecting component. The snap-fit structure is configured so that the first connecting component and the second connecting component engage with each other within a first angle range and separate from each other within a second angle range.

[0019] Preferably, the first connecting flange includes a first connecting plate and a second connecting plate, the first locking ring is connected between the first connecting plate and the second connecting plate, the first connecting plate is provided with an injection hole connected to the liquid inlet channel, the second connecting plate is provided with a drainage hole connected to the liquid outlet channel, and the empty tube is connected to the drainage hole.

[0020] Preferably, the second connecting flange includes a third connecting disk, the second locking ring is relatively fixed to the third connecting disk, and the third connecting disk is provided with a drainage pipe connected to the liquid outlet channel. When two adjacent piles are docked, the drainage pipe is inserted into the injection hole.

[0021] Preferably, the inner walls of the first connecting component and the second connecting component are provided with grooves, and the inner side of the first connecting flange or the second connecting flange is provided with a clamping ring, and the clamping ring is connected to the groove.

[0022] The gradient unloading method of the above-mentioned detachable dynamic reinforced precast pile structure comprises the following steps:

[0023] Step 1: Fill the empty tube corresponding to the target direction with pressure medium to switch the locking components in the corresponding first locking ring and second locking ring from the locked position to the unlocked position;

[0024] Step 2: The first connecting member and the second connecting member at the corresponding position of the empty pipe are in a disengaged state, and the second steel bar is controlled to move toward the axis of the pile column until the first connecting member and the second connecting member are completely disengaged from the first locking ring and the second locking ring;

[0025] Step 3: Pull the second steel bar upward to remove the second steel bar in this direction;

[0026] Repeat steps 1 to 3 to remove the second rebar in the target direction.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] The precast pile structure proposed in this application has a two-part reinforcement structure, one part is the main reinforcement arranged in the concrete structure, and the other part is the temporary reinforcement arranged outside the concrete structure. The temporary reinforcement is flexibly and detachably connected through the flange structure at the upper and lower ends of the concrete structure. During the construction period, the main reinforcement and temporary reinforcement are used as a load transfer path. At the end of the construction, some or all of the temporary reinforcement are removed, and the main reinforcement is used as the load transfer path. Through the flexible configuration of the above-mentioned main reinforcement and temporary reinforcement, the fixed mode of the traditional reinforcement system throughout its life cycle is broken through, and the on-demand dynamic configuration requirements of the precast pile reinforcement are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0030] Figure 1 It is a structural schematic diagram of the pile shown in the present invention;

[0031] Figure 2 It is a schematic diagram of the splicing state of two upper and lower adjacent piles shown in the present invention;

[0032] Figure 3 is a schematic diagram of a connection state between a first steel bar and a first connecting flange and a second connecting flange shown in the present invention;

[0033] Figure 4 It is a structural schematic diagram of the first connecting flange shown in the present invention;

[0034] Figure 5 This is a schematic structural diagram of the present invention showing a snap ring connected to the inner sides of a plurality of first connecting components;

[0035] Figure 6 It is a structural schematic diagram of the locking component shown in the present invention;

[0036] Figure 7 Schematic diagram of the connection state of the first connecting component and the second connecting component shown in the present invention. DETAILED DESCRIPTION

[0037] In order to better understand the technical content of the present invention, specific embodiments are given below in conjunction with the accompanying drawings.

[0038] Combine Figure 1 As shown, the first aspect of the present invention provides a detachable dynamic reinforced prefabricated pile structure, including a pile column 100, a first connecting flange 200, a second connecting flange 300, a plurality of first connecting components 400, a plurality of second connecting components 500 and a plurality of second steel bars 600.

[0039] When the prefabricated piles are pressed into the soil layer, the plurality of pile columns 100 are pressed in sequence in an up-and-down arrangement and are fixed to each other by screw connections or welding.

[0040] Specifically, the pile 100 includes a concrete structure 120 , and a first steel bar 110 and a hollow tube 130 embedded in the concrete structure 120 .

[0041] Among them, the first steel bar 110 serves as the main reinforcement to meet the strength requirements of the pile column 100 when used in the soil layer, and the second steel bar 600 is arranged on the outside of the pile column 100, and only serves to increase the strength of the pile column 100 during the lifting and pressing process. When the pile column 100 is pressed in as a whole, it can be considered to remove part or all of the second steel bar 600.

[0042] Furthermore, by embedding the hollow tube 130 in the concrete structure 120 , it is convenient to input the pressure medium through the hollow tube 130 later to control the connection status of the first connection member 400 and the second connection member 500 connected to different piles 100 .

[0043] Further, combined Figures 1 to 3 As shown, the first connecting flange 200 is connected to the upper end of the pile 100 , and the second connecting flange 300 is connected to the lower end of the pile 100 .

[0044] The first connecting flange 200 and the second connecting flange 300 not only facilitate the connection between the upper and lower piles 100 , but also increase the strength of the ends of the piles 100 , allowing them to withstand a greater hammer load during the press-in process.

[0045] In addition, the first connecting flange 200 and the second connecting flange 300 also serve as a connection for the second steel bars 600. Multiple first connecting parts 400 are detachably connected to the inner side of the first connecting flange 200, and multiple second connecting parts 500 are detachably connected to the inner side of the second flange 300. Multiple second steel bars 600 are connected to the first connecting flange 200 and the second flange 300 through the first connecting parts 400 and the second connecting parts 500.

[0046] Each of the second steel bars 600 is connected to the first connecting member 400 and the second connecting member 500 at a corresponding position.

[0047] As mentioned above, the first connecting flange 200 and the second connecting flange 300 are separate parts that can be welded together through the first steel bar 110 to form the skeleton of the pile body. The empty tube 130 can be fixed in a suitable position by using steel wire binding or the like, and then the main structure of the precast pile is formed by pouring concrete.

[0048] Combine Figure 4 and Figure 5 As shown, a plurality of first connection components 400 are connected to the inner side of the first connection flange 200 in a centrally symmetrical distribution.

[0049] Furthermore, a plurality of second connection components 500 are also connected to the inner side of the second connection flange 300 in a centrally symmetrical distribution.

[0050] In the axial section direction of the precast pile, the positions of the plurality of first connecting components 400 and the plurality of second connecting components 500 correspond to each other.

[0051] In this way, the plurality of second steel bars 600 are also centrally symmetrically distributed and connected to the first connecting member 400 and the second connecting member 500 at corresponding positions.

[0052] Combine Figure 2 As shown, the first connecting flange 200 is provided with a first locking ring 220 , the second connecting flange 300 is provided with a second locking ring 320 , the first connecting component 400 is detachably connected to the first locking ring 220 , and the second connecting component 500 is detachably connected to the second locking ring 320 .

[0053] The first locking ring 220 and the second locking ring 320 are both provided with locking components inside, and the locking components have a locking position and an unlocking position.

[0054] When the locking component is in the locking position, the first connecting component 400 is relatively fixed to the first locking ring 220, and the second connecting component 500 is relatively fixed to the second locking ring 320. When the locking component is in the unlocking position, the first connecting component 400 is separated from the first locking ring 220, and the second connecting component 500 is separated from the second locking ring 320.

[0055] Furthermore, the empty tube 130 is connected to the first locking ring 220 and the second locking ring 320, and the empty tube 130 is used to fill the first locking ring 220 and the second locking ring 320 with pressure medium to change the position state of the locking component, so that it switches from the locked position to the unlocked position.

[0056] Thus, the flexible connection between the first and second connecting flanges 200 and 300 and the first and second connecting parts 400 and 500 can control the connection state between the second steel bar 600 and the pile body 100 , which is conducive to the assembly and disassembly of the second steel bar 600 .

[0057] It should be understood that when the pile body 100 is in the process of lifting, transporting or pile driving, the second steel bar 600 is connected to the pile body 100 to meet the high load requirements in the above process. When multiple piles 100 are pressed into the soil layer, part or all of the second steel bars 600 are removed as needed to reduce the reinforcement amount of the pile body 100.

[0058] In an optional embodiment, the first connecting component 400 and the first locking ring 220 are connected by plugging, and the plugging direction of the first connecting component 400 and the first locking ring 220 is perpendicular to the axial direction of the pile column 100. The second connecting component 500 and the second locking ring 320 are also connected by plugging, and the plugging direction of the second connecting component 500 and the second locking ring 320 is perpendicular to the axial direction of the pile column 100.

[0059] Therefore, the first connecting component 400 and the second connecting component 500 can bear axial force after being connected, and the first connecting component 400 or the second connecting component 500 can be removed only when the direction is perpendicular to the axis of the pile body.

[0060] Combine Figure 2 and Figure 6 As shown, the first locking ring 220 and the second locking ring 320 have the same structure. The first locking ring 220 and the second locking ring 320 are both constructed with a hydraulic cavity inside. The upper end of the hydraulic cavity is connected to the liquid inlet channel 221, and the lower end is connected to the liquid outlet channel 222. The locking component includes a piston 242 and a push rod 241 fixed to each other in the hydraulic cavity. The push rod 241 is located on the first side of the piston 242, and the liquid inlet channel 221 and the liquid outlet channel 222 are located on the second side of the piston 242.

[0061] In this way, when the pressure medium enters the second side of the piston 242 through the liquid inlet channel 221, the pressure on the second side of the piston 242 increases, pushing the push rod 241 toward the first side of the piston 242. The push rod 241 can push out the first connecting component 400 or the second connecting component 500 to facilitate the removal of the first connecting component 400 or the second connecting component 500.

[0062] Specifically, the inner sides of the first locking ring 220 and the second locking ring 320 are both provided with slots, into which the first connecting component 400 or the second connecting component 500 can be inserted. When the piston 242 is set so that the pressure on the second side is greater than that on the first side, the push rod 241 is pushed to disengage the first connecting component 400 or the second connecting component 500 from the slot.

[0063] Combine Figure 7 As shown, the first connecting component 400 and the second connecting component 500 both include a steel bar fixing portion 401 and an insertion portion 402. The steel bar fixing portion 401 is provided with at least one insertion hole 410. The second steel bar 600 can be inserted into the insertion hole 410 and fixed to the steel bar fixing portion 401 by a bolt 440. The insertion portion 402 can be inserted into the slot.

[0064] In this way, when the second steel bar 600 is inserted into the socket 410 and fixed, and the insertion part 402 is inserted into the slot, the second steel bar 600, the first connecting part 400, the second connecting part 500 and the first connecting flange 200 and the second connecting flange 300 form a rigid connection.

[0065] In an optional embodiment, the second steel bar 600 is connected to the socket 410, and then the second steel bar 600 is fixed to the upper and lower surfaces of the steel bar fixing part 401 using bolts 440 for fixation. By adjusting the position of the bolts 440, the relative position of the second steel bar 600 and the steel bar fixing part 401 can be fine-tuned.

[0066] Further, combined Figure 7 As shown, in order to enable the lower first connecting component 400 and the upper second connecting component 500 to be spliced together after the upper and lower piles 100 are spliced together, a protruding snap-fit structure 420 is provided at the bottom of the first connecting component 400, and a snap-fit hole 510 that cooperates with the snap-fit structure 420 is provided at the upper end of the second connecting component 500.

[0067] The snap-fit structure 420 is configured so that the first connecting component 400 and the second connecting component 500 engage with each other within a first angular range and separate from each other within a second angular range.

[0068] Specifically, when the insertion portions 402 of the first connecting component 400 and the second connecting component 500 are aligned with the positions of the slots, the snap-fit structure 420 can be inserted into the snap-fit hole 510 and be clamped and fixed. When the first connecting component 400 and the second connecting component 500 are rotated 90 degrees relative to the axis of the snap-fit structure 420, the first connecting component 400 and the second connecting component 500 can be separated from each other.

[0069] In a specific embodiment, a strong magnetic block 403 is provided at the end of the insertion part 402. When there is no pressure medium on the second side of the piston 242, the insertion part 402 can be easily inserted into the slot, and the strong magnetic block 403 can be adsorbed on the end face of the slot to ensure the reliability of the connection between the insertion part 402 and the slot.

[0070] Optionally, the pressure medium can be water or hydraulic oil. Water or hydraulic oil can be used as a pressure transmission medium through a pressure source such as a pressure pump to transmit pressure to the second side of the piston 242. When the pressure on the second side is greater than the suction force of the strong magnetic block 403, the piston 242 can move toward the first side to push the inserted part 402 out. When the strong magnetic block 403 is separated from the inner wall of the slot by a certain distance, it no longer has suction force, and the inserted part 402 can be pulled out directly along the direction of the slot.

[0071] Combine Figure 7 As shown, the bottom of the clamping structure 420 is designed to have two claws arranged opposite to each other and extending outward, and a clamping slot is provided inside the clamping hole 510. When the clamping structure 420 is inserted into the clamping hole 510, the clamping claws are first compressed and retracted inward until they are completely inserted into the clamping slot. Then, the clamping claws pop outward and are fixed to the clamping slot, so that the clamping structure 420 cannot be pulled out of the clamping hole 510.

[0072] It should be understood that the slot is designed to have grooves corresponding to the direction in which the claws enter. For example, grooves are provided on both sides of the thickness direction of the steel bar fixing part 401, while the two sides of the width direction of the steel bar fixing part 401 are smooth hole walls. When the claws of the clamping structure 420 are rotated from the thickness direction of the steel bar fixing part 401 to the width direction, the two claws contract inward and can be pulled out of the clamping hole 510.

[0073] In an optional embodiment, the first connecting component 400 and the second connecting component 500 are each provided with two insertion holes 410, that is, each of the first connecting component 400 and the second connecting component 500 can be connected to two second steel bars 600. In this way, when the first connecting component 400 and the second connecting component 500 are in an unlocked state, pulling out the first connecting component 400 and the second connecting component 500 will not easily cause a change in the relative angle between the first connecting component 400 and the second connecting component 500, thereby avoiding the snap-in structure 420 from falling off from the snap-in hole 510.

[0074] In an optional embodiment, the first connecting flange 200 includes a first connecting plate 210 and a second connecting plate 230, the first locking ring 220 is connected between the first connecting plate 210 and the second connecting plate 230, the first connecting plate 210 is provided with an injection hole 232 connected to the liquid inlet channel 221, the second connecting plate 230 is provided with a drainage hole connected to the liquid outlet channel 222, and the empty tube 130 is connected to the drainage hole.

[0075] Furthermore, the second connecting flange 300 includes a third connecting disk 310, the second locking ring 320 is relatively fixed to the third connecting disk 310, and the third connecting disk 310 is provided with a drainage pipe connected to the liquid outlet channel 222. When two adjacent piles 100 are docked, the drainage pipe is inserted into the injection hole 232.

[0076] It can be understood that the first connecting plate 210 , the second connecting plate 230 and the third connecting plate 310 are not only provided with injection holes 232 corresponding to the injection channels 221 , but also provided with steel bar through holes 231 corresponding to the positions of the first steel bars 110 .

[0077] Combine Figure 2 As shown, after the upper and lower piles 100 are spliced together, the second steel bar 600 is assembled to the inner side of the pile 100, and its upper end extends to the hole of the second connecting plate 230, and its lower end passes through the third connecting plate 310 and also extends to the hole of the second connecting plate 230. The second steel bar 600, the first connecting component 400, the second connecting component 500, and the first connecting flange 200 and the second connecting flange 300 form a rigid connection to share the impact load during the pile pressing process.

[0078] In a specific embodiment, when the upper and lower piles 100 are connected together, the liquid inlet channel 221, the liquid outlet channel 222, the drain pipe and the empty pipe 130 at the same circumferential position form an independent channel. When the pressure medium is injected into the uppermost injection hole 232, the pressure on the second side of the piston 242 in the hydraulic cavity of the piles 100 at different depths at the corresponding positions will increase, so that the first connecting parts 400 and the second connecting parts 500 at the corresponding positions are all changed from a connected state to an unlocked state, and the corresponding second steel bar 600 can be removed together with the first connecting part 400 and the second connecting part 500.

[0079] In an optional embodiment, a groove 430 is provided on the inner wall of the first connecting component 400 and the second connecting component 500 , and a snap ring 440 is provided on the inner side of the first connecting flange 200 or the second connecting flange 300 , and the snap ring 440 is connected to the groove 430 .

[0080] In order to prevent the first connecting part 400 and the second connecting part 500 from being out of contact with the first connecting flange 200 or the second connecting flange 300 under the impact force during the pile driving process, a clamping ring 440 is provided to prevent the first connecting part 400 and the second connecting part 500 from moving inward. When the pile driving is completed, the clamping ring 440 can be pulled out by a tool such as a pull rope or a hook. At this time, there is no clamping ring 440 on the inner side of the first connecting part 400 and the second connecting part 500. By injecting pressure medium into the corresponding injection hole 232, the first connecting part 400 and the second connecting part 500 and the second steel bar 600 at the corresponding position can be removed.

[0081] Gradient unloading method for detachable dynamically reinforced precast pile structures

[0082] The gradient unloading method for the above-mentioned detachable dynamic reinforced precast pile structure includes the following steps:

[0083] Step 1: Fill the empty tube 130 corresponding to the target direction with pressure medium to switch the locking components in the corresponding first locking ring 220 and second locking ring 320 from the locked position to the unlocked position;

[0084] Step 2: The first connecting member 400 and the second connecting member 500 at the corresponding position of the empty pipe 130 are in a disengaged state, and the second steel bar 600 is controlled to move toward the axis of the pile column 100 until the first connecting member 400 and the second connecting member 500 are completely disengaged from the first locking ring 220 and the second locking ring 320;

[0085] Step 3: Pull the second steel bar 600 upward to remove the second steel bar 600 in this direction;

[0086] Repeat steps 1 to 3 to remove the second steel bar 600 in the target direction.

[0087] Specifically, part or all of the second steel bars 600 can be removed as needed to achieve gradient unloading requirements.

[0088] In a specific embodiment, after all the piles 100 have been pressed, all the clamping rings 440 are pulled out in sequence using a tool such as a pull rope or a hook, so that the inner sides of all the first connecting parts 400 and the second connecting parts 500 do not have the clamping rings 440. Then, according to the injection hole 232 at a suitable position on the top pile 100, the pipeline between the injection hole 232 and the pressure pump is connected, and the pressure medium is injected into the injection hole 232. After the pressure medium fills the empty pipe, the liquid inlet channel 221 and the liquid outlet channel 222 corresponding to the injection hole 232, the second side of the piston 242 starts to increase the pressure (the bottom one). The bottom of the pile column 100 is connected to the pile tip, and the liquid outlet channel 222 at the bottom is blocked), and the pressure is transmitted to the second side of the piston 242. When the pressure on the second side is greater than the suction force of the strong magnetic block 403, the piston 242 can move toward the first side to push out the inserted part 402. When the strong magnetic block 403 is separated from the inner wall of the slot by a certain distance, it no longer has suction force, and the inserted part 402 can be pulled out directly along the direction of the slot using a clamping tool. At this time, the second steel bar 600 is removed together with the corresponding first connecting part 400 and second connecting part 500, completing the removal and unloading of the second steel bar 600 in the target direction.

[0089] While the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Persons skilled in the art will readily appreciate that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A detachable dynamic reinforced prefabricated pile structure, characterized in that: include: A pile column (100), the pile column (100) comprising a concrete structure (120) and a first steel bar (110) and a hollow tube (130) embedded in the concrete structure (120); A first connecting flange (200) connected to the upper end of the pile (100); A second connecting flange (300) connected to the lower end of the pile (100); a plurality of first connecting components (400) detachably connected to the inner side of the first connecting flange (200); a plurality of second connecting components (500) detachably connected to the inner side of the second flange (300); a plurality of second steel bars (600), each of the second steel bars (600) being connected to the first connecting member (400) and the second connecting member (500) at a corresponding position; The first connecting flange (200) is provided with a first locking ring (220), the second connecting flange (300) is provided with a second locking ring (320), the first connecting component (400) is detachably connected to the first locking ring (220), and the second connecting component (500) is detachably connected to the second locking ring (320); The first locking ring (220) and the second locking ring (320) are both provided with locking components inside, and the locking components have a locking position and an unlocking position. When the locking components are in the locking position, the first connecting component (400) is relatively fixed to the first locking ring (220), and the second connecting component (500) is relatively fixed to the second locking ring (320). When the locking components are in the unlocking position, the first connecting component (400) is separated from the first locking ring (220), and the second connecting component (500) is separated from the second locking ring (320). The empty tube (130) is connected to the first locking ring (220) and the second locking ring (320), and the empty tube (130) is used to fill the first locking ring (220) and the second locking ring (320) with pressure medium to change the position state of the locking component so that it switches from a locked position to an unlocked position.

2. The detachable dynamic reinforced prefabricated pile structure according to claim 1, characterized in that: The first connecting component (400) is plug-connected to the first locking ring (220), and the plug-in direction of the first connecting component (400) and the first locking ring (220) is perpendicular to the axial direction of the pile (100). The second connecting component (500) is plug-connected to the second locking ring (320), and the plug-in direction of the second connecting component (500) and the second locking ring (320) is perpendicular to the axial direction of the pile (100).

3. The detachable dynamic reinforced prefabricated pile structure according to claim 1, characterized in that: The first locking ring (220) and the second locking ring (320) have the same structure. The first locking ring (220) and the second locking ring (320) are both constructed with a hydraulic cavity inside. The upper end of the hydraulic cavity is connected to the liquid inlet channel (221), and the lower end is connected to the liquid outlet channel (222). The locking component includes a piston (242) and a push rod (241) fixed to each other in the hydraulic cavity. The push rod (241) is located on a first side of the piston (242), and the liquid inlet channel (221) and the liquid outlet channel (222) are located on a second side of the piston (242).

4. The detachable dynamic reinforced prefabricated pile structure according to claim 3, characterized in that: The inner sides of the first locking ring (220) and the second locking ring (320) are both provided with slots, into which the first connecting component (400) or the second connecting component (500) can be inserted, and when the piston (242) is set to have a pressure on the second side greater than that on the first side, the push rod (241) is pushed to disengage the first connecting component (400) or the second connecting component (500) from the slot.

5. The detachable dynamic reinforced prefabricated pile structure according to claim 4, characterized in that: The first connecting component (400) and the second connecting component (500) both include a steel bar fixing portion (401) and an insertion portion (402), wherein the steel bar fixing portion (401) is provided with at least one insertion hole (410), the second steel bar (600) can be inserted into the insertion hole (410) and fixed to the steel bar fixing portion (401) by bolts, and the insertion portion (402) can be inserted into the slot.

6. The detachable dynamic reinforced prefabricated pile structure according to claim 1, characterized in that: A protruding snap-fit structure (420) is provided below the first connecting component (400), and a snap-fit hole (510) that cooperates with the snap-fit structure (420) is provided at the upper end of the second connecting component (500). The snap-fit structure (420) is configured so that the first connecting component (400) and the second connecting component (500) engage with each other within a first angular range and separate from each other within a second angular range.

7. The detachable dynamic reinforced prefabricated pile structure according to claim 3, characterized in that: The first connecting flange (200) includes a first connecting disk (210) and a second connecting disk (230), the first locking ring (220) is connected between the first connecting disk (210) and the second connecting disk (230), the first connecting disk (210) is provided with a liquid injection hole (232) connected to the liquid inlet channel (221), the second connecting disk (230) is provided with a liquid discharge hole communicated with the liquid outlet channel (222), and the empty tube (130) is communicated with the liquid discharge hole.

8. The detachable dynamic reinforced prefabricated pile structure according to claim 7, characterized in that: The second connecting flange (300) includes a third connecting disk (310), the second locking ring (320) is fixed relative to the third connecting disk (310), and the third connecting disk (310) is provided with a drainage pipe connected to the liquid outlet channel (222). When two adjacent piles (100) are docked, the drainage pipe is inserted into the injection hole (232).

9. The detachable dynamic reinforced prefabricated pile structure according to claim 1, characterized in that: The inner walls of the first connecting component (400) and the second connecting component (500) are provided with a groove (430), and the inner side of the first connecting flange (200) or the second connecting flange (300) is provided with a snap ring (440), and the snap ring (440) is connected to the groove (430).

10. The gradient unloading method of a detachable dynamic reinforced precast pile structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Filling the empty tube (130) corresponding to the target direction with a pressure medium, so that the locking components in the corresponding first locking ring (220) and the second locking ring (320) are switched from a locked position to an unlocked position; Step 2: The first connecting component (400) and the second connecting component (500) at the corresponding position of the empty pipe (130) are in a disengaged state, and the second steel bar (600) is controlled to move toward the axial direction of the pile column (100) until the first connecting component (400) and the second connecting component (500) are completely disengaged from the first locking ring (220) and the second locking ring (320); Step 3: Pull the second steel bar (600) upwards to remove the second steel bar (600) in this direction; Repeat steps 1 to 3 to achieve the removal of the second steel bar (600) in the target direction.

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