Prefabricated pile structure with detachable reinforcement

Abstract

The utility model relates to the technical field of pile foundation construction, and concretely relates to prefabricated pile structure of detachable reinforcement, which comprises: a pile column, the pile column includes concrete structure and first reinforcing steel and empty pipe embedded into the concrete structure; a first connecting flange connected to the upper end of the pile column; a second connecting flange connected to the lower end of the pile column. The prefabricated pile structure has 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 detachably connected through the flange structure at the upper and lower ends of the concrete structure. Part or all of the temporary reinforcement is removed at the end of construction. Through the flexible configuration of the main reinforcement and the temporary reinforcement, the traditional reinforcement system is broken through from the fixed mode in the whole life cycle, and the dynamic configuration requirement of the prefabricated pile reinforcement is realized.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation construction technology, and more specifically to a precast pile structure with detachable reinforcement. Background Technology

[0002] Precast piles are widely used due to their advantages such as high construction efficiency and controllable quality. Precast piles are piles of various materials and forms (such as wooden piles, concrete square piles, prestressed concrete pipe piles, steel piles, etc.) manufactured in factories or on construction sites, and then driven, pressed, or vibrated into the soil using pile driving equipment. Prestressed concrete pipe piles have the advantages of high pile strength and strong compressive and flexural bearing capacity, and are widely used in building engineering. They utilize high-strength concrete and prestressed tendons, which effectively improve the pile's bearing capacity and crack resistance.

[0003] However, the reinforcement design in prestressed concrete pipe piles is mainly based on the maximum stress requirements during the construction phase, including the maximum stress requirements during hoisting, transportation, and pile driving operations. Studies have shown that during the construction phase, instantaneous loads such as hoisting impact force and pile driving resistance often reach 2 to 3 times the bearing capacity of the pile during normal service life, requiring reinforcement to be designed according to this peak value. Therefore, this reinforcement method not only wastes steel but also significantly increases the cost of pile foundation engineering. Utility Model Content

[0004] To address the technical problems existing in precast piles in the prior art, this utility model proposes a precast pile structure with detachable reinforcement, comprising:

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

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

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

[0008] Multiple first connecting components are detachably connected to the inside of the first connecting flange;

[0009] Multiple second connecting components are detachably connected to the inside of the second connecting flange;

[0010] Multiple second reinforcing bars, each of which is connected to the first connecting component and the second connecting component at a corresponding position.

[0011] Preferably, 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] Both the first locking ring and the second locking ring have locking components inside. The locking components have a locking position and an unlocking position. When the locking components are in the locking position, the first connecting component is fixed relative to the first locking ring, and the second connecting component is fixed relative to the second locking ring. When the locking components are in the unlocking position, the first connecting component disengages from the first locking ring, and the second connecting component disengages from the second locking ring.

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

[0014] Preferably, the first connecting component is plugged into the first locking ring, and the plugging direction of the first connecting component and the first locking ring is perpendicular to the pile axis direction; the second connecting component is plugged into the second locking ring, and the plugging direction of the second connecting component and the second locking ring is perpendicular to the pile axis direction.

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

[0016] Preferably, both the first locking ring and the second locking ring have slots on their inner sides, and the first connecting member or the second connecting member can be inserted into the slots. When the piston is set to have a greater pressure on the second side than on the first side, it pushes the push rod to disengage the first connecting member or the second connecting member from the slot.

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

[0018] Preferably, the first connecting component has a protruding snap-fit ​​structure at its lower end, and the second connecting component has a snap-fit ​​hole at its upper end that mates with the snap-fit ​​structure. The snap-fit ​​structure is configured such that the first connecting component and the second connecting component snap into each other within a first angular range and separate from each other within a second angular 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 drain hole communicating with the liquid outlet channel, and the empty pipe is connected to the drain hole.

[0020] Preferably, the second connecting flange includes a third connecting plate, the second locking ring is fixed relative to the third connecting plate, and the third connecting plate is provided with a drain pipe communicating with the liquid outlet channel. When two adjacent piles are connected, the drain 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 retaining ring, which is connected to the groove.

[0022] Compared with the prior art, the advantages of this utility model are:

[0023] The precast pile structure proposed in this application has two reinforcement structures: one part is the main reinforcement set inside the concrete structure, and the other part is the temporary reinforcement set outside the concrete structure. The temporary reinforcement is flexibly and detachably connected through flange structures 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 stage, some or all of the temporary reinforcement is removed, and the main reinforcement is used as the load transfer path. Through the flexible configuration of the main reinforcement and temporary reinforcement, the traditional fixed mode of reinforcement system throughout the whole life cycle is broken, and the dynamic configuration requirement of precast pile reinforcement is realized. Attached Figure Description

[0024] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of the pile column shown in this utility model;

[0026] Figure 2 This is a schematic diagram of the splicing state of two adjacent piles shown in this utility model;

[0027] Figure 3 This is a schematic diagram showing the connection state between the first reinforcing bar and the first and second connecting flanges as illustrated in this utility model.

[0028] Figure 4 This is a schematic diagram of the structure of the first connecting flange shown in this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the retaining ring connected to the inner side of multiple first connecting components as shown in this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the locking component shown in this utility model;

[0031] Figure 7 This is a schematic diagram showing the connection state of the first connecting component and the second connecting component as illustrated in this utility model. Detailed Implementation

[0032] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0033] Combination Figure 1 As shown, the first aspect of this utility model proposes a precast pile structure with detachable reinforcement, 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 reinforcing bars 600.

[0034] During the process of precast piles being pressed into the soil, multiple piles 100 are pressed in sequentially in an up-down arrangement and are fixed to each other by threaded connections or welding.

[0035] Specifically, the pile 100 includes a concrete structure 120 and a first reinforcing bar 110 and a hollow pipe 130 embedded in the concrete structure 120.

[0036] The first steel bar 110 serves as the main reinforcement, which is sufficient to meet the strength requirements of the pile 100 in the soil layer. The second steel bar 600 is set on the outside of the pile 100 and only plays the role of increasing the strength of the pile 100 during hoisting and pressing. After the pile 100 is pressed in as a whole, some or all of the second steel bars 600 can be removed.

[0037] Furthermore, by embedding the hollow pipe 130 in the concrete structure 120, it is beneficial to input pressure medium through the hollow pipe 130 in the later stage to control the connection status of the first connecting component 400 and the second connecting component 500 connected to different piles 100.

[0038] Furthermore, in combination 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.

[0039] 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, enabling them to withstand greater hammer loads during the pressing process.

[0040] In addition, the first connecting flange 200 and the second connecting flange 300 also serve to connect the second reinforcing bars 600. Multiple first connecting parts 400 are detachably connected to the inside of the first connecting flange 200, and multiple second connecting parts 500 are detachably connected to the inside of the second connecting flange 300. Multiple second reinforcing bars 600 are connected to the first connecting flange 200 and the second connecting flange 300 through the first connecting parts 400 and the second connecting parts 500.

[0041] Each of the second reinforcing bars 600 is connected to the first connecting component 400 and the second connecting component 500 at the corresponding position.

[0042] As mentioned above, the first connecting flange 200 and the second connecting flange 300 are separate parts that can be welded together by the first reinforcing bar 110 to form the skeleton of the pile body. The hollow pipe 130 can be fixed in a suitable position by means of steel wire binding, and then the main structure of the precast pile is formed by pouring concrete.

[0043] Combination Figure 4 and Figure 5 As shown, multiple first connecting parts 400 are centrally symmetrically distributed and connected to the inner side of the first connecting flange 200.

[0044] Furthermore, multiple second connecting parts 500 are also centrally symmetrically distributed and connected to the inner side of the second connecting flange 300.

[0045] In the axial tangential direction of the precast pile, the positions of multiple first connecting parts 400 and multiple second connecting parts 500 correspond.

[0046] Thus, multiple second reinforcing bars 600 are also centrally symmetrically distributed and connected to the first connecting component 400 and the second connecting component 500 at corresponding positions.

[0047] Combination 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.

[0048] Both the first locking ring 220 and the second locking ring 320 have locking components inside, and the locking components have a locking position and an unlocking position.

[0049] When the locking component is in the locked position, the first connecting component 400 is fixed relative to the first locking ring 220, and the second connecting component 500 is fixed relative to the second locking ring 320. When the locking component is in the unlocked position, the first connecting component 400 disengages from the first locking ring 220, and the second connecting component 500 disengages from the second locking ring 320.

[0050] Furthermore, the empty pipe 130 is connected to the first locking ring 220 and the second locking ring 320. The empty pipe 130 is used to fill the first locking ring 220 and the second locking ring 320 with a pressure medium to change the position of the locking component and switch it from the locked position to the unlocked position.

[0051] Thus, the flexible connection between the first connecting flange 200 and the second connecting flange 300 and the first connecting component 400 and the second connecting component 500 can control the connection state between the second reinforcing bar 600 and the pile body 100. This method is beneficial for the assembly and disassembly of the second reinforcing bar 600.

[0052] It should be understood that when the pile body 100 is being hoisted, transported or driven, the second steel bar 600 is connected to the pile body 100 to meet the high load requirements in the above process. After multiple piles 100 are driven into the soil, some or all of the second steel bars 600 may be removed as needed to reduce the amount of reinforcement in the pile body 100.

[0053] In an optional embodiment, the first connecting component 400 and the first locking ring 220 are connected by a plug-in method, and the plug-in direction of the first connecting component 400 and the first locking ring 220 is perpendicular to the axis of the pile 100. The second connecting component 500 and the second locking ring 320 are also connected by a plug-in method, and the plug-in direction of the second connecting component 500 and the second locking ring 320 is perpendicular to the axis of the pile 100.

[0054] Therefore, the first connecting component 400 and the second connecting component 500 can bear axial force after being connected. The first connecting component 400 or the second connecting component 500 can only be removed when it is perpendicular to the axis of the pile.

[0055] Combination Figure 2 and Figure 6 As shown, the first locking ring 220 and the second locking ring 320 have the same structure. Both the first locking ring 220 and the second locking ring 320 have a hydraulic chamber inside. The upper end of the hydraulic chamber is connected to the inlet channel 221 and the lower end is connected to the outlet channel 222. The locking component includes a piston 242 and a push rod 241 that are fixed to each other in the hydraulic chamber. The push rod 241 is located on the first side of the piston 242, and the inlet channel 221 and the outlet channel 222 are located on the second side of the piston 242.

[0056] Thus, when the pressure medium enters the second side of the piston 242 through the 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 part 400 or the second connecting part 500, so as to facilitate the removal of the first connecting part 400 or the second connecting part 500.

[0057] Specifically, the inner sides of the first locking ring 220 and the second locking ring 320 are provided with slots, and the first connecting part 400 or the second connecting part 500 can be inserted into the slots. When the piston 242 is set to have a greater pressure on the second side than on the first side, it pushes the push rod 241 to disengage the first connecting part 400 or the second connecting part 500 from the slot.

[0058] Combination Figure 7 As shown, both the first connecting component 400 and the second connecting component 500 include a steel bar fixing part 401 and an insertion part 402. The steel bar fixing part 401 is provided with at least one insertion hole 410, into which the second steel bar 600 can be inserted and fixed to the steel bar fixing part 401 by bolts 440. The insertion part 402 can be inserted into a slot.

[0059] Thus, when the second reinforcing bar 600 is inserted into the socket 410 and fixed, and the insertion part 402 is inserted into the slot, the second reinforcing bar 600, the first connecting part 400, the second connecting part 500, the first connecting flange 200 and the second connecting flange 300 form a rigid connection.

[0060] In an optional embodiment, the second reinforcing bar 600 is connected to the insertion hole 410, and then the second reinforcing bar 600 is fixed to the upper and lower surfaces of the reinforcing bar fixing part 401 using bolts 440. By adjusting the position of the bolts 440, the relative position of the second reinforcing bar 600 and the reinforcing bar fixing part 401 can be finely adjusted.

[0061] Furthermore, in combination Figure 7 As shown, in order to enable the lower first connecting part 400 and the upper second connecting part 500 to be spliced ​​together after the two piles 100 are spliced, the lower part of the first connecting part 400 is provided with a protruding snap-fit ​​structure 420, and the upper end of the second connecting part 500 is provided with a snap hole 510 that cooperates with the snap-fit ​​structure 420.

[0062] The snap-fit ​​structure 420 is configured such 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.

[0063] Specifically, when the insertion portions 402 of the first connecting member 400 and the second connecting member 500 are aligned with the slots, the snap-fit ​​structure 420 can be inserted into the snap-fit ​​hole 510 and locked in place. When the first connecting member 400 and the second connecting member 500 are rotated 90 degrees relative to the axis of the snap-fit ​​structure 420, the first connecting member 400 and the second connecting member 500 can be separated from each other.

[0064] In a specific embodiment, the end of the insertion part 402 is provided with a strong magnetic block 403. 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 attracted to the end face of the slot, ensuring the reliability of the connection between the insertion part 402 and the slot.

[0065] Optionally, the pressure medium can be water or hydraulic oil. Water or hydraulic oil can be used as the 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 attraction of the strong magnetic block 403, the piston 242 can move to the first side and push out the insertion 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 attraction and the insertion part 402 can be pulled out directly along the slot direction.

[0066] Combination Figure 7 As shown, the bottom of the snap-fit ​​structure 420 is designed with two oppositely arranged and outwardly extending claws. The inside of the snap-fit ​​hole 510 is provided with a slot. When the snap-fit ​​structure 420 is inserted into the snap-fit ​​hole 510, the claws are first compressed and retracted inward until they are fully inserted into the slot. Then, the claws spring outward and are fixed in the slot, so that the snap-fit ​​structure 420 cannot be pulled out of the snap-fit ​​hole 510.

[0067] It should be understood that the slot is designed with grooves corresponding to the direction of the claw entry. For example, grooves are provided on both sides in the thickness direction of the steel bar fixing part 401, while the two sides in the width direction of the steel bar fixing part 401 are smooth hole walls. When the claws of the locking structure 420 rotate from the thickness direction of the steel bar fixing part 401 to the width direction, the two claws retract inward and can be pulled out from the locking hole 510.

[0068] In an optional embodiment, both the first connecting component 400 and the second connecting component 500 are provided with two insertion holes 410, that is, each of the first connecting component 400 and the second connecting component 500 can connect to two second reinforcing bars 600. In this way, when the first connecting component 400 and the second connecting component 500 are in the 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, so as to avoid the snap-fit ​​structure 420 from falling off the snap-fit ​​hole 510.

[0069] In an optional embodiment, the first connecting flange 200 includes a first connecting plate 210 and a second connecting plate 230, a 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 drain hole communicating with the liquid outlet channel 222, and the empty pipe 130 is connected to the drain hole.

[0070] Furthermore, the second connecting flange 300 includes a third connecting plate 310, and the second locking ring 320 is fixed relative to the third connecting plate 310. The third connecting plate 310 is provided with a drain pipe that communicates with the liquid outlet channel 222. When two adjacent piles 100 are connected, the drain pipe is inserted into the injection hole 232.

[0071] It is understandable that the first connecting plate 210, the second connecting plate 230 and the third connecting plate 310 mentioned above are not only provided with injection holes 232 corresponding to the injection channel 221, but also with steel bar through holes 231 corresponding to the position of the first steel bar 110.

[0072] Combination Figure 2 As shown, after the upper and lower piles 100 are spliced ​​together, the second steel bar 600 is assembled into the inner side of the pile 100, with its upper end extending into the hole of the second connecting plate 230 and its lower end passing through the third connecting plate 310 and also extending into the hole of the second connecting plate 230. The second steel bar 600, the first connecting component 400, the second connecting component 500, the first connecting flange 200, and the second connecting flange 300 form a rigid connection to share the impact load during the pile driving process.

[0073] In a specific embodiment, when the upper and lower piles 100 are connected together, the inlet channel 221, outlet channel 222, drain pipe and 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 chamber of the piles 100 at different depths at the corresponding positions will increase, so that the first connecting component 400 and the second connecting component 500 at the corresponding positions will all change from the connected state to the unlocked state, and the corresponding second steel bar 600 can be removed together with the first connecting component 400 and the second connecting component 500.

[0074] In an optional embodiment, the inner walls of the first connecting component 400 and the second connecting component 500 are provided with grooves 430, and the inner side of the first connecting flange 200 or the second connecting flange 300 is provided with a retaining ring 440, which is connected to the groove 430.

[0075] To prevent the first connecting component 400 and the second connecting component 500 from losing contact with the first connecting flange 200 or the second connecting flange 300 under the impact force during the pile driving process, a retaining ring 440 is provided to prevent the first connecting component 400 and the second connecting component 500 from moving inward. After the pile driving is completed, the retaining ring 440 can be pulled out by pulling ropes or hooks. At this time, the inner side of the first connecting component 400 and the second connecting component 500 will not have a retaining ring 440. By injecting pressure medium into the corresponding injection hole 232, the first connecting component 400, the second connecting component 500, and the second reinforcing bar 600 at the corresponding positions can be removed.

[0076] The aforementioned gradient unloading method for detachable reinforced precast pile structures includes the following steps:

[0077] Step 1: Fill the empty pipe 130 corresponding to the target direction with pressure medium, so that the locking components in the corresponding first locking ring 220 and second locking ring 320 are switched from the locked position to the unlocked position;

[0078] Step 2: The first connecting part 400 and the second connecting part 500 at the corresponding position of the empty pipe 130 are in a disengaged state. Control the second reinforcing bar 600 to move in the axial direction of the pile column 100 until the first connecting part 400 and the second connecting part 500 are completely disengaged from the first locking ring 220 and the second locking ring 320.

[0079] Step 3: Pull the second reinforcing bar 600 upwards to remove it in this direction;

[0080] Repeat steps 1 to 3 to remove the second reinforcing bar 600 in the target direction.

[0081] Specifically, as needed, some or all of the second reinforcing bars 600 can be removed to achieve the requirement of gradient unloading.

[0082] In a specific embodiment, after all piles 100 are driven into the ground, all retaining rings 440 are pulled out sequentially using tools such as ropes or hooks, so that the inner sides of all first connecting parts 400 and second connecting parts 500 are free of retaining rings 440. Then, according to the selected injection hole 232 at a suitable position on the uppermost pile 100, the pipeline between the injection hole 232 and the pressure pump is connected, and pressure medium is injected into the injection hole 232. After the pressure medium fills the empty pipe, inlet channel 221, and outlet channel 222 corresponding to the injection hole 232, the second side of the piston 242 begins to pressurize (the lowermost...). The bottom of the pile 100 is connected to the pile tip (the liquid outlet channel 222 at the bottom is blocked), which transmits pressure to the second side of the piston 242. When the pressure on the second side is greater than the attraction of the strong magnetic block 403, the piston 242 can move to the first side and push out the insertion 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 attraction. The insertion part 402 can be pulled out directly along the slot direction using a clamping tool. At this time, the second steel bar 600, together with the corresponding first connecting part 400 and second connecting part 500, is removed, completing the removal and unloading of the second steel bar 600 in the target direction.

[0083] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A precast pile structure with detachable reinforcement, characterized in that, include: A pile column (100), the pile column (100) comprising a concrete structure (120) and a first reinforcing bar (110) and a hollow tube (130) embedded in the concrete structure (120); The first connecting flange (200) is connected to the upper end of the pile (100); The second connecting flange (300) is connected to the lower end of the pile (100); Multiple first connecting parts (400) are detachably connected to the inside of the first connecting flange (200); Multiple second connecting parts (500) are detachably connected to the inside of the second connecting flange (300); Multiple second reinforcing bars (600), each of the second reinforcing bars (600) is connected to the first connecting member (400) and the second connecting member (500) at the corresponding position.

2. The precast pile structure with detachable reinforcement according to claim 1, characterized in that, 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); Both the first locking ring (220) and the second locking ring (320) are provided with locking components inside. 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 fixed relative to the first locking ring (220), and the second connecting component (500) is fixed relative to the second locking ring (320). When the locking components are in the unlocking position, the first connecting component (400) disengages from the first locking ring (220), and the second connecting component (500) disengages from the second locking ring (320). The empty tube (130) is connected to the first locking ring (220) and the second locking ring (320). The empty tube (130) is used to fill the first locking ring (220) and the second locking ring (320) with a pressure medium to change the position of the locking component and switch it from the locked position to the unlocked position.

3. The precast pile structure with detachable reinforcement according to claim 2, characterized in that, The first connecting component (400) is plugged into the first locking ring (220), and the plugging direction of the first connecting component (400) and the first locking ring (220) is perpendicular to the axis of the pile (100). The second connecting component (500) is plugged into the second locking ring (320), and the plugging direction of the second connecting component (500) and the second locking ring (320) is perpendicular to the axis of the pile (100).

4. The precast pile structure with detachable reinforcement according to claim 2, characterized in that, The first locking ring (220) and the second locking ring (320) have the same structure. Both the first locking ring (220) and the second locking ring (320) have a hydraulic chamber inside. The upper end of the hydraulic chamber is connected to the inlet channel (221) and the lower end is connected to the outlet channel (222). The locking component includes a piston (242) and a push rod (241) that are fixed to each other in the hydraulic chamber. The push rod (241) is located on the first side of the piston (242), and the inlet channel (221) and the outlet channel (222) are located on the second side of the piston (242).

5. The precast pile structure with detachable reinforcement according to claim 4, characterized in that, The first locking ring (220) and the second locking ring (320) are provided with slots on their inner sides. The first connecting member (400) or the second connecting member (500) can be inserted into the slots. When the piston (242) is set to have a pressure greater on the second side than on the first side, it pushes the push rod (241) to disengage the first connecting member (400) or the second connecting member (500) from the slot.

6. The precast pile structure with detachable reinforcement according to claim 5, characterized in that, The first connecting component (400) and the second connecting component (500) both include a steel bar fixing part (401) and an insertion part (402). The steel bar fixing part (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 part (401) by bolts. The insertion part (402) can be inserted into the slot.

7. The precast pile structure with detachable reinforcement according to claim 1, characterized in that, The first connecting component (400) has a protruding snap-fit ​​structure (420) at its lower end, and the second connecting component (500) has a snap-fit ​​hole (510) at its upper end that mates with the snap-fit ​​structure (420). The snap-fit ​​structure (420) is configured such that the first connecting component (400) and the second connecting component (500) snap into each other within a first angle range and separate from each other within a second angle range.

8. The precast pile structure with detachable reinforcement according to claim 4, characterized in that, 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 drain hole communicating with the liquid outlet channel (222). The empty pipe (130) is connected to the drain hole.

9. The precast pile structure with detachable reinforcement according to claim 8, characterized in that, The second connecting flange (300) includes a third connecting plate (310), and the second locking ring (320) is fixed relative to the third connecting plate (310). The third connecting plate (310) is provided with a drain pipe that communicates with the liquid outlet channel (222). When two adjacent piles (100) are connected, the drain pipe is inserted into the injection hole (232).

10. The precast pile structure with detachable reinforcement 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 grooves (430), and the inner side of the first connecting flange (200) or the second connecting flange (300) is provided with a retaining ring (440), which is connected to the groove (430).

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