Ultra-large diameter and ultra-deep three-sleeve dry soil taking and expansion vibration pipe pile

Abstract

The present application provides a super-large-diameter and super-deep three-sleeve dry soil-taking and bottom-expanding vibration pipe pile, relates to the technical field of vibration pipe pile machine and construction technology. The super-large-diameter and super-deep three-sleeve dry soil-taking and bottom-expanding vibration pipe pile comprises a pile sinking machine main body and a hydraulic hollow vibration hammer, the hydraulic hollow vibration hammer is provided with a hydraulic clamp, further comprising: an outer sleeve sinking pipe, the outer sleeve sinking pipe is connected with the hydraulic hollow vibration hammer at the upper end and is used for penetrating the soil layer; a middle sleeve, the middle sleeve is arranged on the inner side of the outer sleeve sinking pipe. The super-large-diameter and super-deep three-sleeve dry soil-taking and bottom-expanding vibration pipe pile is provided with a three-sleeve coaxial nested sleeve structure and is matched with a plurality of groups of circumferential array pulley blocks, so that the sliding friction between the sleeves is converted into rolling friction, the relative motion friction resistance of the sleeves is significantly reduced, the coaxial motion precision of the sleeves under the super-deep working condition is guaranteed, the sleeve jamming and deflection failure are avoided, and the problem of poor operation stability of the single and double sleeve pipe equipment under the super-large and super-high working condition is solved.

Description

Technical Field

[0001] This invention relates to the field of vibratory driven pipe pile technology, specifically to construction equipment and technology for ultra-large diameter, ultra-deep three-tube dry soil extraction and bottom expansion vibratory driven pipe piles. Background Technology

[0002] Vibratory pipe driving is a common construction method in the field of foundation treatment. It is widely used in foundation reinforcement projects such as crushed stone piles and compaction piles. For pile foundation construction in large-diameter and ultra-deep conditions, the industry often uses single-casing or double-casing vibratory pipe driving equipment. It relies on a vibratory hammer to drive the casing to sink to the target soil layer, and then completes the filling and pipe pulling operations to form the pile. This type of equipment relies on the casing wall protection to achieve hole wall stability, is suitable for various geological conditions, and has been widely promoted and applied in foundation reinforcement projects such as backfill soil and sandy soil.

[0003] However, existing single and double casing pipe-driving equipment still has many limitations when constructing ultra-large diameter, ultra-deep, and complex strata. On the one hand, the guiding and limiting structure between casings is simple, and the frictional resistance during the relative movement of casings is large, which easily leads to casing jamming and coaxiality deviation, making it difficult to meet the stability requirements of operation at great depths. On the other hand, traditional pipe-driving equipment has poor adaptability to soil extraction and bottom enlargement operations, making it difficult to achieve dry soil extraction inside the pipe. The pile formation process is easily affected by groundwater and borehole collapse, and the quality of pile end enlargement is difficult to guarantee. At the same time, the traditional casing structure cannot achieve flexible and controllable adjustment of the relative position of the filling channel inside the pipe and the casing. In ultra-deep working conditions, the accuracy of bottom enlargement crushed stone and pile filling is insufficient, which restricts the construction quality and efficiency of large-diameter ultra-deep compaction and enlargement piles. The existing dilemma is that the deeper the pile, the larger the pile driver chassis, the higher the pile frame, and the worse the pile driver safety. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an ultra-large diameter, ultra-deep three-casing dry soil extraction and bottom expansion vibratory driven pipe pile, which solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an ultra-large diameter, ultra-deep three-casing dry excavation and base-expanding vibratory driven pile, comprising a pile driving machine body and a hydraulic hollow vibratory hammer, the hydraulic hollow vibratory hammer being equipped with a hydraulic clamp, and further comprising:

[0006] The outer casing of the pile driving pipe is connected at its upper end to a hydraulic hollow vibratory hammer, which is used to penetrate various complex geological soil layers.

[0007] The middle sleeve is installed in the outer pile driving pipe connection, and the upper end of the middle sleeve is connected to the hydraulic clamp that is matched with the hydraulic hollow vibratory hammer.

[0008] Soil removal mechanism, which is located at the lower end of the inner side of the middle casing, is used to remove the soil that enters the casing when the middle casing is submerged;

[0009] Inner sleeve, which is disposed inside the middle sleeve, and the inner sleeve, middle sleeve and outer pile driving pipe are coaxially arranged;

[0010] A positioning component is disposed between the middle sleeve and the inner sleeve, and is used to control the relative position of the middle sleeve and the inner sleeve.

[0011] Preferably, the top end of the outer casing pile driving pipe is detachably connected to the hydraulic hollow vibratory hammer, and the upper end port of the outer casing pile driving pipe is open.

[0012] Preferably, the top end of the middle sleeve is connected to a hydraulic clamp, a first pulley group is provided at the upper end of the outer side of the middle sleeve, a second pulley group is provided at the lower end of the middle sleeve, and the length of the middle sleeve is less than that of the outer pile driving pipe.

[0013] Preferably, the frame of the first pulley group is fixedly installed on the outer side of the middle sleeve, and the rollers are rotatably installed on the inner side of the frame, with the rollers contacting the outer pile driving pipe. The frame of the second pulley group is fixedly installed on the lower inner side of the outer pile driving pipe, and the rollers of the second pulley group are in contact with the middle sleeve. Both the first pulley group and the second pulley group are arranged in a circular array.

[0014] Preferably, the soil sampling mechanism includes a positioning ring, a sliding ring, a bending rod, and a flow guiding and limiting plate. The positioning ring is fixedly disposed on the inner side of the lower end of the middle sleeve. The sliding ring is slidably connected to the inner wall of the middle sleeve. A telescopic rod is provided between the sliding ring and the positioning ring. The fixed end of the telescopic rod is fixedly connected to the positioning ring, and the free end is fixedly connected to the sliding ring. The bending rod is rotatably connected to the sliding ring and is arranged in a circular array. The flow guiding and limiting plate is a triangular plate with both its upper and lower end faces being arc surfaces. The lower end of the flow guiding and limiting plate is rotatably connected to the middle sleeve, and the upper end is rotatably connected to the bending rod. After being stretched by the bending rod, the flow guiding and limiting plate can enter the groove in the inner wall of the middle sleeve.

[0015] Preferably, the upper end of the inner sleeve is provided with a pile cap, the lower end of the pile cap is provided with a feeding port from the side, a locking ring is provided on the outside of the pile cap, a third pulley group is provided on the outer side of the upper end of the inner sleeve, the third pulley group is in contact with the inner wall of the middle sleeve, a fourth pulley group is connected to the lower end of the inner sleeve, the fourth pulley group is fixedly provided on the lower end of the inner wall of the middle sleeve, the inner sleeve is hollow, a feeding cylinder is formed in the center, and the feeding cylinder is connected to the upper end port of the outer pile driving pipe.

[0016] Preferably, the locking assembly includes an upper hydraulic locking ring and a lower hydraulic locking ring. The upper hydraulic locking ring is disposed at the upper end of the inner side of the middle sleeve and is used to lock and fix the position of the locking ring at the upper end of the inner sleeve. The lower hydraulic locking ring is disposed at the lower end of the inner side of the middle sleeve. The lower hydraulic locking ring is alternately distributed with the fourth pulley group and is used to lock and fix the position of the locking ring at the upper end of the inner sleeve.

[0017] Preferably, the upper edge of the middle sleeve is thickened to receive the impact of the hydraulic clamp, and the lower edge of the middle sleeve is chamfered and fits into the outer pile driving pipe.

[0018] Preferably, after the flow guiding and limiting plate rotates and fits against the inner wall of the inner sleeve, the central hole can accommodate the free passage of the inner sleeve.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This ultra-large diameter, ultra-deep three-casing dry excavation and bottom expansion vibratory driven pile, through the cooperation of three sets of coaxial nested casing structures and multiple sets of circumferential array pulley groups, transforms the sliding friction between the casings into rolling friction, significantly reducing the relative motion friction resistance of the casings, ensuring the coaxial motion accuracy of the casings under ultra-deep working conditions, achieving the effect of avoiding casing jamming and deflection failures, and solving the problem of poor stability of single and double casing equipment in ultra-large and ultra-high operations.

[0021] 2. This ultra-large diameter, ultra-deep three-casing dry soil extraction and bottom expansion vibratory driven pile uses a retractable soil extraction mechanism installed at the lower end of the middle casing. This mechanism allows the telescopic rod to drive the sliding ring and bending rod to move the guide and limit plate to complete the opening and cutting and retraction actions, enabling dry soil extraction inside the pipe. After soil extraction is completed, the inner casing can be bypassed, achieving a seamless connection between the dry soil extraction, bottom expansion, and filling processes. This solves the problems of difficult dry soil extraction and poor pile end bottom expansion quality in driven pile equipment.

[0022] 3. This ultra-large diameter, ultra-deep three-casing dry soil extraction and bottom expansion vibratory driven pipe pile uses a locking assembly composed of an upper hydraulic clasp and a lower hydraulic clasp to enable the inner casing to be locked in both high and low positions. This allows for flexible switching of the relative positions of the inner and middle casings, enabling precise placement of fill material in ultra-deep locations. This achieves the effect of segmented material placement and layered compaction, solving the problems of insufficient fill material placement accuracy in ultra-deep working conditions of pipe driven equipment, difficulty in guaranteeing pile quality, and the decrease in pile machine safety as the pile frame height increases. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the outer casing pipe structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the inner structure of the outer casing of the pile driving pipe of the present invention;

[0026] Figure 4 This is a schematic diagram of the sleeve structure in this invention;

[0027] Figure 5 This is a schematic diagram of the flow guiding and limiting plate structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the inner sleeve structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the first pulley block structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the third pulley block structure of the present invention.

[0031] In the diagram: 1. Main body of the pile driving machine; 2. Hydraulic hollow vibratory hammer; 3. Outer pile driving pipe; 4. Middle sleeve; 41. First pulley block; 42. Second pulley block; 5. Soil removal mechanism; 51. Positioning ring; 52. Sliding ring; 53. Bending rod; 54. Guide and limiting plate; 6. Inner sleeve; 61. Third pulley block; 62. Fourth pulley block; 7. Locking assembly; 71. Upper hydraulic retaining ring; 72. Lower hydraulic retaining ring. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0036] like Figure 1-8 As shown, the ultra-large diameter ultra-deep three-casing dry soil extraction and bottom expansion vibratory pipe pile includes the main body of the pile driving machine 1 and the hydraulic hollow vibratory hammer 2. The hydraulic hollow vibratory hammer 2 is equipped with a hydraulic clamp. It also includes: outer pile driving pipe 3, middle casing 4, soil extraction mechanism 5, inner casing 6 and positioning component 7.

[0037] The upper end of the outer casing 3 is connected to the hydraulic hollow vibratory hammer 2, which is used to penetrate various complex geological soil layers. It is similar in form to a steel casing. The middle casing 4 is connected to the outer casing 3. The upper end of the middle casing 4 is connected to the hydraulic hollow vibratory hammer 2 with a hydraulic clamp. The soil removal mechanism 5 is located at the lower end of the inner side of the middle casing 4, which is used to remove the soil inside the middle casing 4. The inner casing 6 is located inside the middle casing 4. The inner casing 6, the middle casing 4 and the outer casing 3 are coaxially arranged. The upper part of the inner casing 6 is provided with a feeding port. The positioning component 7 is located between the middle casing 4 and the inner casing 6, which is used to control the relative position of the middle casing 4 and the inner casing 6.

[0038] In this embodiment, the overall assembly structure of the three-tube equipment consists of an outer casing 3, a middle casing 4, and an inner casing 6 arranged coaxially from the outside to the inside. The equipment relies on the hydraulic hollow vibratory hammer 2 and the matching hydraulic clamps on the main body 1 of the pile driving machine to provide operating power. The soil removal mechanism 5 is installed on the inner side of the lower end of the middle casing 4 to realize dry soil removal. The positioning component 7 is installed between the middle casing 4 and the inner casing 6 to realize the relative position constraint between the middle casing 4 and the inner casing 6. In this way, the entire set of operations of pipe driving, soil removal, bottom expansion, and material feeding are completed in a coordinated manner. The base of the main body 1 of the pile driving machine of this equipment is driven by a walking machine.

[0039] In an optional embodiment, the top end of the outer pile driving pipe 3 is detachably connected to the hydraulic hollow vibratory hammer 2, and the upper end port of the outer pile driving pipe 3 is open.

[0040] In this embodiment, the outer pile driving pipe 3 and the hydraulic hollow vibratory hammer 2 are assembled and connected by a quick-release structure, which facilitates the disassembly and splicing of pipe sections on site; the upper end of the outer pile driving pipe 3 is cylindrically open, so that the filler end can be introduced into the pipe body.

[0041] In an optional embodiment, the top end of the middle sleeve 4 is connected to a hydraulic clamp, a first pulley group 41 is provided at the upper outer end of the middle sleeve 4, a second pulley group 42 is provided at the lower end of the middle sleeve 4, and the length of the middle sleeve 4 is less than that of the outer pile driving pipe 3.

[0042] In this embodiment, the middle sleeve 4 is held by a hydraulic clamp to transmit vibration and tamping power; the first pulley group 41 and the second pulley group 42 are respectively arranged at the upper and lower ends of the middle sleeve 4, forming a rolling guide pair with the outer pile driving pipe 3; relying on the difference in pipe length, the outer pile driving pipe 3 enters the soil first during operation, forming external protection for the middle sleeve 4.

[0043] In an optional embodiment, the frame of the first pulley group 41 is fixedly disposed on the outer side of the middle sleeve 4, and the rollers are rotatably disposed on the inner side of the frame, with the rollers contacting the outer pile driving pipe 3. The frame of the second pulley group 42 is fixedly disposed on the lower inner side of the outer pile driving pipe 3, and the rollers of the second pulley group 42 are in contact with the middle sleeve 4. Both the first pulley group 41 and the second pulley group 42 are arranged in a circular array.

[0044] In this embodiment, the first pulley group 41 moves synchronously with the middle sleeve 4, and the second pulley group 42 is fixedly installed on the lower part of the inner wall of the outer sleeve pile pipe 3; the two pulley groups adopt a circumferentially distributed roller structure, which converts the sliding friction between the sleeves into rolling friction, and continuously plays a radial guiding and limiting role in the entire lifting and lowering stroke of the middle sleeve 4.

[0045] In an optional embodiment, the soil sampling mechanism 5 includes a positioning ring 51, a sliding ring 52, a bending rod 53, and a flow guiding and limiting plate 54. The positioning ring 51 is fixedly disposed on the inner side of the lower end of the middle sleeve 4. The sliding ring 52 is slidably connected to the inner wall of the middle sleeve 4. A telescopic rod is provided between the sliding ring 52 and the positioning ring 51. The fixed end of the telescopic rod is fixedly connected to the positioning ring 51, and the free end is fixedly connected to the sliding ring 52. The bending rod 53 is rotatably connected to the sliding ring 52. The bending rod 53 is arranged in a circular array. The flow guiding and limiting plate 54 is a triangular plate with both the upper and lower end faces being arc surfaces. The lower end of the flow guiding and limiting plate 54 is rotatably connected to the middle sleeve 4, and the upper end is rotatably connected to the bending rod 53. After being stretched by the bending rod 53, the flow guiding and limiting plate 54 can enter the groove in the inner wall of the middle sleeve 4.

[0046] In this embodiment, the soil extraction mechanism 5 uses the positioning ring 51 as a fixed base, and the telescopic rod drives the sliding ring 52 to move axially along the inner wall of the middle sleeve 4, which in turn drives multiple sets of bending rods 53 to swing, thereby driving the guide and limiting plate 54 to complete the opening and cutting of the soil or the retraction and storage, realizing the switching between the two working states of dry soil extraction and avoidance.

[0047] In an optional embodiment, a pile cap is provided at the upper end of the inner sleeve 6, and a feeding port is provided at the lower end of the pile cap from the side. A locking ring is provided on the outer side of the pile cap. A third pulley group 61 is provided on the outer side of the upper end of the inner sleeve 6. The third pulley group 61 is in contact with the inner wall of the middle sleeve 4. A fourth pulley group 62 is connected to the lower end of the inner sleeve 6. The fourth pulley group 62 is fixedly provided at the lower end of the inner wall of the middle sleeve 4. The inner sleeve 6 is hollow and a feeding cylinder is formed in the center. The feeding cylinder is connected to the upper end port of the outer pile driving pipe 3.

[0048] In this embodiment, the pile cap at the upper end of the inner sleeve 6 bears the vibration and tamping load, and the locking ring on the outer side of the pile cap is used to lock with the locking component 7; the third pulley group 61 and the fourth pulley group 62 are respectively arranged at the upper and lower ends of the inner sleeve 6 to achieve radial limiting; the hollow tube body of the inner sleeve 6 forms a feeding cylinder that extends straight to the pile end and is connected to the upper end port of the outer sleeve pile driving pipe 3.

[0049] In an optional embodiment, the locking assembly 7 includes an upper hydraulic locking ring 71 and a lower hydraulic locking ring 72. The upper hydraulic locking ring 71 is disposed at the upper end of the inner side of the middle sleeve 4 and is used to lock and fix the position of the locking ring at the upper end of the inner sleeve 6. The lower hydraulic locking ring 72 is disposed at the lower end of the inner side of the middle sleeve 4. The lower hydraulic locking ring 72 is alternately distributed with the fourth pulley group 62 and is used to lock and fix the position of the locking ring at the upper end of the inner sleeve 6.

[0050] In this embodiment, the upper hydraulic retaining ring 71 and the lower hydraulic retaining ring 72 of the locking assembly 7 are radially retractable claw structures; the upper hydraulic retaining ring 71 realizes the high-position locking of the inner sleeve 6, and the lower hydraulic retaining ring 72 realizes the low-position locking of the inner sleeve 6, thereby switching the relative mating position between the inner sleeve 6 and the middle sleeve 4; the lower hydraulic retaining ring 72 and the fourth pulley group 62 are arranged in a spatially staggered manner, and their assembly does not interfere with each other.

[0051] In an optional embodiment, the upper edge of the middle sleeve 4 is thickened to receive the impact of the hydraulic clamp, and the lower edge of the middle sleeve 4 is chamfered and fits into the outer pile driving pipe 3.

[0052] In this embodiment, the thickened part at the upper end of the middle sleeve 4 improves the pipe opening's resistance to clamping impact; the chamfer at the lower end of the middle sleeve 4 serves both to guide movement and reduce drag, and to fit against the inner wall of the outer sleeve pile driving pipe 3, preventing mud and sand from entering the interlayer between the two sleeves.

[0053] In an optional embodiment, after the flow guiding and limiting plate 54 rotates to fit the inner wall of the inner sleeve 4, the central hole can accommodate the free passage of the inner sleeve 6.

[0054] In this embodiment, after the flow guiding and limiting plate 54 is completely retracted and abuts against the wall of the middle sleeve 4, the plates enclose to form a central passage hole. The diameter of the passage hole is larger than the outer diameter of the inner sleeve 6, allowing the inner sleeve 6 to pass downwards without obstruction, thus achieving seamless process switching.

[0055] During use, the main body 1 of the pile driving machine is moved to the construction site and the equipment is leveled. The whole machine adopts a centrally pressurized column pile frame. The outer casing 3, the middle casing 4, and the inner casing 6 are assembled in sequence. The hydraulic hollow vibratory hammer 2 is started to drive the outer casing 3 to vibrate and sink at high frequency, penetrating the hard clay layer and the rubble backfill layer. After the outer casing 3 is in place, the hydraulic clamp holds the middle casing 4 and, together with the hydraulic hollow vibratory hammer 2, rams the middle casing 4 into the interior of the outer casing 3. The hydraulic telescopic rod of the soil extraction mechanism 5 is extended, pushing the sliding ring 52 downward. The bending rod 53 drives the guide limit plate 54 to open outward to carry out dry soil extraction. The depth of soil extraction in a single operation is controlled within a fixed range. Multiple insertion and extraction operations are performed. Until the target hard soil layer is penetrated; after soil extraction is completed, the upper hydraulic retaining ring 71 is extended to lock the inner sleeve 6 and the middle sleeve 4 into one; the crushed stone base material is fed into the inner sleeve 6 feeding cylinder from the upper end of the outer sleeve pile pipe 3; when the sleeve is pulled upward as a whole, the hydraulic hollow vibratory hammer 2 is used to ram the outer sleeve pile pipe 3 to make the crushed stone form an enlarged head at the pile end. For ultra-deep positions, the upper hydraulic retaining ring 71 is released so that the lower hydraulic retaining ring 72 is locked into the middle sleeve 4 to achieve accurate long-distance crushed stone delivery. Subsequently, the pile body filling material is put in sections, compacted in sections, and the outer sleeve pile pipe 3, middle sleeve 4, and inner sleeve 6 are pulled out layer by layer until they are all pulled out of the ground, completing the construction of a single ultra-large diameter ultra-deep compacted and enlarged crushed stone pile.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0057] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultra-large diameter, ultra-deep three-casing dry excavation and bottom-expanding vibratory driven pile, comprising a pile driving machine body (1) and a hydraulic hollow vibratory hammer (2), wherein the hydraulic hollow vibratory hammer (2) is equipped with a hydraulic clamp, characterized in that, Also includes: The outer casing (3) is connected at the upper end to the hydraulic hollow vibratory hammer (2) for penetrating the soil layer, and its form is equivalent to a steel casing. The middle sleeve (4) is set inside the outer pile driving pipe (3), and the upper end of the middle sleeve (4) is connected to the hydraulic clamp set in the hydraulic hollow vibratory hammer (2); Soil extraction mechanism (5), which is located at the lower end of the inner side of the middle sleeve (4) and is used to extract soil from the inner side of the middle sleeve (4); Inner sleeve (6), the inner sleeve (6) is set inside the middle sleeve (4), the inner sleeve (6), the middle sleeve (4) and the outer pile driving pipe (3) are coaxially arranged, and the upper part of the inner sleeve (6) is provided with a feeding port; Positioning component (7) is disposed between the middle sleeve (4) and the inner sleeve (6) to control the relative position of the middle sleeve (4) and the inner sleeve (6).

2. The ultra-large diameter, ultra-deep three-casing dry excavation and base expansion vibratory driven pile according to claim 1, characterized in that: The top end of the outer casing pile driving pipe (3) is detachably connected to the hydraulic hollow vibratory hammer (2), and the upper end port of the outer casing pile driving pipe (3) is open.

3. The ultra-large diameter, ultra-deep three-casing dry excavation and base expansion vibratory driven pile according to claim 1, characterized in that: The top end of the middle sleeve (4) is connected to the hydraulic clamp. A first pulley group (41) is provided on the upper outer side of the middle sleeve (4), and a second pulley group (42) is provided on the lower end of the middle sleeve (4). The length of the middle sleeve (4) is less than that of the outer pile driving pipe (3).

4. The ultra-large diameter, ultra-deep three-casing dry excavation and base expansion vibratory driven pile according to claim 3, characterized in that: The frame of the first pulley group (41) is fixedly set on the outer side of the middle sleeve (4), and the roller is rotated on the inner side of the frame. The roller is in contact with the outer pile driving pipe (3). The frame of the second pulley group (42) is fixedly set on the lower inner side of the outer pile driving pipe (3). The roller of the second pulley group (42) is in contact with the middle sleeve (4). Both the first pulley group (41) and the second pulley group (42) are arranged in a circular array.

5. The ultra-large diameter, ultra-deep three-casing dry excavation and base expansion vibratory driven pile according to claim 1, characterized in that: The soil sampling mechanism (5) includes a positioning ring (51), a sliding ring (52), a bending rod (53), and a flow guiding and limiting plate (54). The positioning ring (51) is fixedly installed on the inner side of the lower end of the middle sleeve (4). The sliding ring (52) is slidably connected to the inner wall of the middle sleeve (4). A telescopic rod is provided between the sliding ring (52) and the positioning ring (51). The fixed end of the telescopic rod is fixedly connected to the positioning ring (51), and the free end is fixedly connected to the sliding ring (52). The bending rod (53) is rotatably connected to the sliding ring (52). The bending rods (53) are arranged in a circular array. The flow guiding and limiting plate (54) is a triangular plate with rounded surfaces at both the upper and lower ends. The lower end of the flow guiding and limiting plate (54) is rotatably connected to the middle sleeve (4), and the upper end is rotatably connected to the bending rod (53). After being stretched by the bending rod (53), the flow guiding and limiting plate (54) can enter the groove in the inner wall of the middle sleeve (4).

6. The ultra-large diameter, ultra-deep three-casing dry excavation and base expansion vibratory driven pile according to claim 2, characterized in that: The inner sleeve (6) is provided with a pile cap at the upper end, and a feeding port is provided at the lower end of the pile cap from the side. A locking ring is provided on the outside of the pile cap. A third pulley group (61) is provided on the outer side of the upper end of the inner sleeve (6). The third pulley group (61) is in contact with the inner wall of the middle sleeve (4). A fourth pulley group (62) is connected to the lower end of the inner sleeve (6). The fourth pulley group (62) is fixedly set at the lower end of the inner wall of the middle sleeve (4). The inner sleeve (6) is hollow and a feeding cylinder is formed in the center. The feeding cylinder is connected to the upper end of the outer pile sinking pipe (3).

7. The ultra-large diameter, ultra-deep three-casing dry excavation and base expansion vibratory driven pile according to claim 6, characterized in that: The locking assembly (7) includes an upper hydraulic locking ring (71) and a lower hydraulic locking ring (72). The upper hydraulic locking ring (71) is located at the upper end of the inner side of the middle sleeve (4) and is used to lock and fix the position of the locking ring at the upper end of the inner sleeve (6). The lower hydraulic locking ring (72) is located at the lower end of the inner side of the middle sleeve (4). The lower hydraulic locking ring (72) is alternately distributed with the fourth pulley group (62). The lower hydraulic locking ring (72) is used to lock and fix the position of the locking ring at the upper end of the inner sleeve (6).

8. The ultra-large diameter, ultra-deep three-casing dry excavation and base expansion vibratory driven pile according to claim 1, characterized in that: The upper edge of the middle sleeve (4) is thickened to receive the impact of the hydraulic clamp, and the lower edge of the middle sleeve (4) is chamfered and fits into the outer pile driving pipe (3).

9. The ultra-large diameter, ultra-deep three-casing dry excavation and base expansion vibratory driven pile according to claim 5, characterized in that: After the flow guide plate (54) rotates and fits against the inner wall of the inner sleeve (4), the central hole can accommodate the free passage of the inner sleeve (6).

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