Pile pulling device and method for construction

Abstract

According to the pile pulling device and method for construction, a lower sleeve is arranged, a limiting swing arm is arranged on the lower sleeve, the lower end of the limiting swing arm is hinged to the lower sleeve, when the limiting swing arm is vertically arranged, the distance between the side wall, close to the axis of the lower sleeve, of the limiting swing arm and the axis of the lower sleeve is larger than the radius of a pile to be pulled, and when the limiting swing arm is horizontally arranged, the distance between the side wall and the axis of the lower sleeve is larger than the radius of the pile to be pulled. The distance between the side wall, close to the axis of the lower sleeve, of the limiting swing arm and the axis of the lower sleeve is smaller than the radius of a to-be-pulled pile. The first nozzle is located at the lower end of the lower sleeve, and a spout of the first nozzle is arranged downwards; and a vibration assembly is arranged at the upper end of the connecting piece. The device has the beneficial effects that a first nozzle sprays high-pressure water to soften a foundation, a lower sleeve is conveniently inserted into the foundation, when the upper end of a limiting swing arm is lower than the lower end of a to-be-pulled pile, the limiting swing arm rotates, the limiting swing arm supports the lower end face of the to-be-pulled pile when the device is lifted upwards, and the to-be-pulled pile moves upwards, so that the working efficiency is improved; the integrity of the to-be-pulled pile is ensured; and the construction cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a pile extraction device and method for construction. Background Technology

[0003] Currently, the mainstream pile extraction technologies mainly include traditional swing-lift extraction, static pile extraction, vibration-assisted pile extraction, and high-pressure water jetting extraction. Among them, traditional swing-lift extraction relies on large equipment, is costly, inefficient, and has a high pile fracture rate; static pile extraction uses heavy and inflexible equipment, and old piles with poor quality are prone to breakage and cannot be completely removed; vibration-assisted pile extraction concentrates vibration energy at the upper end of the pile, resulting in a high risk of breakage; and high-pressure water jetting extraction has poor controllability of the jetting direction, making the pile prone to instability. In summary, the current pile extraction technology mainly uses a connecting device to fix the top part of the pile to be extracted, and then uses appropriate lifting equipment for swinging and lifting. This method has the following problems: First, the lifting equipment not only increases the cost significantly, but also has low work efficiency and is prone to causing serious damage to the surrounding geology; Second, it requires excavation to the depth below the pile top to expose the pile head that can be lifted, which places higher demands on the working conditions; Third, the pile to be extracted is prone to breakage during swinging and lifting, making it more difficult to extract the pile body below the breakage, and the extracted pile body cannot be reused. Summary of the Invention

[0004] In view of this, the present invention aims to provide a pile extraction device and method for construction, in order to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows: The first aspect of the present invention provides a pile extraction device for construction, comprising: The lower sleeve is provided with a limiting swing arm. The lower end of the limiting swing arm is hinged to the lower sleeve. When the limiting swing arm is set vertically, the distance between the side wall of the limiting swing arm near the axis of the lower sleeve and the axis of the lower sleeve is greater than the radius of the pile to be extracted. When the limiting swing arm is set horizontally, the distance between the side wall of the limiting swing arm near the axis of the lower sleeve and the axis of the lower sleeve is less than the radius of the pile to be extracted. The first nozzle is located at the lower end of the lower sleeve, with the nozzle orifice facing downwards, and the upper end of the first nozzle is connected to the liquid outlet of the liquid supply device. A connector, the lower end of which is connected to the lower sleeve, and a vibration component is provided at the upper end of the connector.

[0006] Furthermore, the upper end of the connector is fixedly connected to the upper sleeve, and the upper end of the upper sleeve is fixedly connected to the vibration assembly; A reinforcing ring is fixed to the outside of the upper sleeve; The number of connectors is two, with the distance between one side of the two connectors being greater than the diameter of the pile to be pulled out, and the distance between the other side being less than the diameter of the pile to be pulled out. The connector is a Larssen sheet pile.

[0007] Furthermore, the lower sleeve has a first mounting hole, and there are multiple first mounting holes, which are evenly arranged circumferentially along the lower sleeve. The first mounting hole has a first hinge shaft inside, the axis of the first hinge shaft is perpendicular to the axis of the lower sleeve, the limiting swing arm has a first hinge hole, and the first hinge shaft is located inside the first hinge hole. The first hinge hole is located at the lower end of the limiting arm and on the side away from the axis of the lower sleeve.

[0008] Furthermore, a limiting plate corresponding to the outer side wall of the lower sleeve is fixed on the lower end of the limiting swing arm away from the axis of the lower sleeve. When the limiting swing arm is set vertically, the limiting plate limits the limiting swing arm. The lower end of the limiting swing arm near the axis of the lower sleeve adopts a rounded chamfer structure; The lower sleeve is fixed with a first support plate corresponding to the lower end face of the first mounting hole. When the limiting swing arm is set horizontally, the first support plate supports the limiting swing arm.

[0009] Furthermore, the lower end of the lower sleeve is provided with a second mounting hole corresponding to the first mounting hole. There are multiple second mounting holes, which are evenly arranged circumferentially along the lower sleeve. The second mounting holes have openings on the lower end face of the lower sleeve. The second mounting hole is provided with a flushing swing arm, and a second hinge shaft is fixed inside the second mounting hole. The upper end of the flushing swing arm has a second hinge hole, and the second hinge shaft is located inside the second hinge hole. The lower end of the flushing arm is provided with a third nozzle, which is arranged along the length of the flushing arm. When the flushing arm is set vertically, the nozzle of the third nozzle is set downward. When the flushing arm is set horizontally, the nozzle of the third nozzle is set downward along the axis of the sleeve. The upper end of the third nozzle is connected to the liquid outlet of the liquid supply device via a hose; A first connecting shaft is fixed at the lower end of the flushing swing arm and on the side near the axis of the lower sleeve. A second connecting shaft is fixed at the side of the limiting swing arm near the axis of the lower sleeve. Connecting seats are fixed at both ends of the tension spring. The two connecting seats of the tension spring are respectively hinged to the first connecting shaft and the second connecting shaft.

[0010] Furthermore, a second support plate corresponding to the upper end face of the second mounting hole is fixedly provided on the inner side of the lower sleeve, and the edge of the upper end of the scouring arm near the axis of the lower sleeve adopts a rounded chamfer structure. When the flushing arm is set horizontally, the second support plate limits the flushing arm. The lower sleeve is fixed with a mounting ring corresponding to the second mounting hole. When the flushing arm is set vertically, the mounting ring limits the flushing arm.

[0011] Furthermore, a mounting ring corresponding to the second mounting hole is fixedly provided on the outer side of the lower sleeve; The mounting ring has multiple vertically arranged connection holes, which are evenly arranged circumferentially along the mounting ring. A second nozzle is connected to the inner side of the lower end of the connection hole corresponding to the flushing arm. The lower inner side of the remaining connection holes is connected to the first nozzle; The lower ends of the first nozzle, the second nozzle, and the third nozzle are all higher than the lower end of the lower sleeve; A valve hole is provided corresponding to the connecting hole of the flushing swing arm. The valve hole has an opening on the inner side wall of the mounting ring. The valve hole is horizontally set and the diameter of the valve hole is not less than the diameter of the connecting hole. One end of the valve hole passes through the connecting hole and the other end corresponds to the flushing swing arm. The valve hole is located below the second hinge shaft. A valve core is provided inside the valve hole, and the diameter of the valve core matches the inner diameter of the valve hole. One end of the valve core is threadedly connected to the crossbar. A baffle is fixed at the end of the crossbar away from the valve core, and the diameter of the baffle is larger than the diameter of the crossbar. The mounting ring has a mounting tube corresponding to the valve hole fixed inside. The mounting tube is threaded to a limit ring. The crossbar is located inside the mounting tube. The limit ring has an annular limit boss on the inner side of the end away from the valve core. A compression spring is provided between the limit ring and the baffle. The mounting ring is provided with a liquid distribution pipe, and the lower end of the liquid distribution pipe is connected to multiple connecting pipes that are connected to the connecting holes. The liquid distribution pipe is connected to the liquid outlet of the liquid supply device. The flushing arm has a first slot, the third nozzle is threaded to the inner side of the lower end of the first slot, the upper end of the first slot is connected to the second slot, and the second slot is connected to the liquid outlet of the liquid supply device through a hose.

[0012] Furthermore, the flushing arm has a storage groove corresponding to the baffle; When the flushing arm is set vertically, the crossbar and baffle are located inside the receiving groove, the bottom end of the receiving groove is pressed against the baffle, and the valve core closes the connection hole. When the flushing arm is set horizontally, the valve core is reset under the elastic force of the compression spring, and the connection hole is in a connected state. The bottom of the storage slot has a threaded groove, and a tightening bolt is threaded into the threaded groove.

[0013] Furthermore, a mounting boss is fixed on one side of the lower end of the flushing swing arm near the axis of the lower sleeve, and a groove is opened on the other side. The edge of the lower end of the mounting boss near the axis of the lower sleeve adopts a rounded chamfer structure. The lower end of the flushing arm has an installation groove. The installation groove has an opening on the end face of the mounting boss near the axis of the lower sleeve. An adjustment plate is provided in the installation groove. The adjustment plate protrudes from the opening of the installation groove. The installation groove is provided with a strip hole arranged along the width direction of the flushing arm. A guide shaft is provided on the adjustment plate. The guide shaft is located inside the strip hole. The side wall of the mounting groove has a threaded hole corresponding to the adjusting plate. The adjusting bolt is threaded into the inside of the threaded hole, and the adjusting bolt limits the end face of the adjusting plate away from the axis of the lower sleeve. The lower edge of the adjusting plate near the axis of the lower sleeve adopts a rounded chamfer structure; The mounting boss is positioned corresponding to the second connecting shaft.

[0014] A second aspect of the present invention provides a method for extracting piles using the pile extraction device described in the first aspect, comprising the following steps: S1. The device is suspended above the pile to be pulled out. The lower sleeve is aligned with the pile to be pulled out and inserted. The flushing arm is rotated downward to make the flushing arm vertical. The flushing arm is in contact with the outer surface of the pile to be pulled out, and the tension spring is further stretched. S2. Turn on the vibration assembly and the liquid supply equipment. High-pressure liquid is sprayed downward through the first nozzle and the second nozzle to soften the foundation below the lower casing. Under the vibration of the vibration assembly, the device moves downward. During this process, the limit swing arm rotates to a vertical state under the drive of the pile to be pulled out, and the tension spring is further stretched. S3. When the lower end of the flushing arm is lower than the lower end of the pile to be pulled, under the tension of the tension spring, the lower end of the flushing arm rotates upward, and the nozzle direction rotates to spray the foundation below the pile to be pulled to form a limiting cavity until the spraying arm is in a horizontal state. S4. When the upper end of the limiting arm is lower than the lower end of the pile to be pulled out, the upper end of the limiting arm rotates downward under the tension of the tension spring and enters the limiting cavity obtained by the S3 injection. S5. Pull the upward device to limit the swing arm support of the pile to be pulled out, and drive the entire pile to be pulled out to move upward.

[0015] Compared with the prior art, the pile extraction device and method for construction described in this invention have the following advantages: (1) The pile extraction device for construction described in this invention uses a first nozzle to spray high-pressure water to soften the foundation, making it easier for the lower sleeve to be inserted into the foundation. When the upper end of the limiting swing arm is lower than the lower end of the pile to be extracted, the limiting swing arm rotates. When the device is lifted upward, the limiting swing arm supports the lower end face of the pile to be extracted, driving the entire pile to be extracted to move upward. The method of lifting the bottom of the pile to be extracted is different from the method of hoisting the top of the pile, which relies on the tensile stress transmitted from the inside of the pile body from top to bottom. This not only improves the efficiency of pile extraction but also reduces stress damage to the pile body, ensuring the integrity of the pile to be extracted, thereby achieving the purpose of being reusable.

[0016] (2) In the construction pile extraction device of the present invention, when the lower end of the scouring swing arm is lower than the lower end of the pile to be extracted, under the tension of the tension spring, the lower end of the scouring swing arm rotates upward, and the nozzle direction rotates to spray the foundation below the pile to be extracted to form a limiting cavity. When the foundation is hard soil, the limiting cavity is formed by the scouring of the scouring swing arm, which facilitates the rotation of the limiting swing arm, improves work efficiency, and expands the applicable scope of the device.

[0017] (3) In the construction pile extraction device of the present invention, when the scouring swing arm is in a vertical state, the scouring swing arm pushes the baffle to drive the valve core to insert into the valve hole. At this time, the second nozzle cannot spray high-pressure liquid, the third nozzle sprays high-pressure liquid, and the high-pressure liquid sprayed by the third nozzle and the first nozzle are both set downward, which facilitates the insertion of the lower sleeve and reduces the use of high-pressure water.

[0018] (4) The pile extraction device for construction described in this invention has an installation ring that not only improves the structural strength of the lower sleeve at the second installation hole and prevents the lower sleeve from deforming, and connects the first nozzle and the second nozzle, but also limits the vertical state of the scouring arm and prevents the lower end of the scouring arm from rotating to the outside of the lower sleeve.

[0019] (5) In the pile extraction device for construction described in this invention, the mounting boss is positioned corresponding to the second connecting shaft, and the mounting boss plays a protective role for the second connecting shaft, reducing the impact of the foundation on the second connecting shaft and the tension spring. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a three-dimensional structural diagram of the device described in an embodiment of the present invention; Figure 2 This is a side view of the device according to an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the lower sleeve of the device described in an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the lower sleeve according to an embodiment of the present invention; Figure 5 This is a three-dimensional cross-sectional view of the device described in an embodiment of the present invention at the lower sleeve. Figure 6 As described in the embodiments of the present invention Figure 5 Schematic diagram of the structure at point A in the middle; Figure 7 As described in the embodiments of the present invention Figure 5 Schematic diagram of the structure at point B; Figure 8 This is a schematic diagram of the three-dimensional structure of the mounting ring according to an embodiment of the present invention; Figure 9 As described in the embodiments of the present invention Figure 8 Schematic diagram of the structure at point C; Figure 10 This is a schematic cross-sectional view of the second nozzle according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the three-dimensional structure of the limiting swing arm according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the three-dimensional structure of the flushing swing arm according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the cross-sectional structure of the scouring swing arm according to an embodiment of the present invention; Figure 14 This is a three-dimensional structural diagram of the flushing swing arm mounting adjustment plate according to an embodiment of the present invention; Figure 15 This is a schematic cross-sectional view of the device described in an embodiment of the present invention at the scouring swing arm. Figure 16 This is a schematic diagram of the cross-sectional structure of the lower casing when the device described in this embodiment of the invention is aligned with the pile to be pulled out. Figure 17 This is a schematic diagram of the cross-sectional structure of the lower sleeve of the device described in this embodiment of the invention after the swing arm rotates and the lower sleeve is inserted into the pile to be pulled out. Figure 18 This is a schematic diagram of the cross-sectional structure of the lower sleeve after the limiting swing arm of the device described in this embodiment of the invention has rotated after the lower sleeve is inserted into the pile to be pulled out. Figure 19 This is a schematic diagram of the cross-sectional structure of the lower sleeve after the swing arm of the device described in this embodiment of the invention has undergone a second rotation. Figure 20 This is a schematic diagram of the cross-sectional structure of the lower sleeve after the limiting swing arm of the device described in this embodiment of the invention has rotated twice. Figure 21 This is a cross-sectional structural diagram of the device described in an embodiment of the present invention at the connector.

[0021] Explanation of reference numerals in the attached figures: 1. Upper sleeve; 2. Connector; 3. Vibration assembly; 4. Lower sleeve; 5. Pile to be pulled out; 6. Mounting ring; 7. Limiting swing arm; 8. Flushing swing arm; 9. Tension spring; 101. Reinforcing ring; 401. First mounting hole; 402. Second mounting hole; 403. First hinge shaft; 404. First support plate; 405. Second hinge shaft; 406. Second support plate; 601. Separating pipe; 60101. Connecting pipe; 602. First nozzle; 603. Second nozzle; 604. Limiting ring; 60401. Annular limiting boss; 605. Crossbar; 60501. Baffle; 60502. Valve Core; 606, Compression spring; 607, Mounting tube; 608, Connecting hole; 609, Valve hole; 701, First connecting shaft; 702, First hinge hole; 703, Limiting plate; 801, Second hinge hole; 802, Second connecting shaft; 803, Storage groove; 804, Threaded hole; 805, Strip hole; 806, Mounting groove; 807, Mounting boss; 808, First slot; 809, Second slot; 810, Third nozzle; 811, Adjusting bolt; 812, Adjusting plate; 81201, Guide shaft; 80301, Threaded groove; 80302, Tightening bolt; 901, Connecting seat. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 21 As shown, a pile extraction device for construction includes: The lower sleeve 4 is equipped with a limiting swing arm 7. The lower end of the limiting swing arm 7 is hinged to the lower sleeve 4. When the limiting swing arm 7 is set vertically, the distance between the side wall of the limiting swing arm 7 near the axis of the lower sleeve 4 and the axis of the lower sleeve 4 is greater than the radius of the pile to be pulled 5. When the limiting swing arm 7 is set horizontally, the distance between the side wall of the limiting swing arm 7 near the axis of the lower sleeve 4 and the axis of the lower sleeve 4 is less than the radius of the pile to be pulled 5. The first nozzle 602 is located at the lower end of the lower sleeve 4. The nozzle of the first nozzle 602 is set downward. The upper end of the first nozzle 602 is connected to the outlet end of the liquid supply device. The connector 2 is connected to the lower sleeve 4 at its lower end. The upper end of the connector 2 is equipped with a vibration component 3.

[0027] The upper end of the connector 2 is fixedly connected to the upper sleeve 1, and the upper end of the upper sleeve 1 is fixedly connected to the vibration component 3. The upper end of the pile to be pulled 5 is located inside the upper sleeve 1, and the lower end of the pile to be pulled 5 is located inside the lower sleeve 4. This plays a positioning role for the pile to be pulled 5 and prevents the pile to be pulled 5 from shaking when it is pulled out.

[0028] A reinforcing ring 101 is fixed on the outside of the upper sleeve 1, which improves the structural strength of the upper sleeve 1.

[0029] There are two connectors 2. The distance between one side of the two connectors 2 is greater than the diameter of the pile 5 to be extracted, and the distance between the other side is less than the diameter of the pile 5 to be extracted, so as to facilitate the removal of the pile 5 from the gap between the two connectors 2 (e.g., Figure 21 As shown, the width at point a is greater than the diameter of the pile 5 to be extracted, and the width at point b is less than the diameter of the pile 5 to be extracted.

[0030] In some embodiments, the two ends of the connector 2 are fixedly connected to the upper sleeve and the lower sleeve, respectively; In other embodiments, the two ends of the connector 2 are detachably connected by bolts. There are various models of connector 2, and the lengths of different models of connector 2 are different, which are suitable for the extraction of piles 5 of different lengths.

[0031] In other embodiments, the connector 2 includes multiple sub-connectors, the two ends of which are detachably connected by bolts. The multiple sub-connectors are connected sequentially along the height direction. The length of the connector 2 can be adjusted by setting the number of sub-connectors, thereby adjusting the overall height of the device. This is suitable for pile extraction operations of piles 5 of different lengths.

[0032] In some embodiments, the connector 2 is a Larssen sheet pile, which is inexpensive and has high structural strength, thus reducing the cost of the device and increasing its structural strength.

[0033] In some embodiments, connector 2 is an existing H-beam.

[0034] In other embodiments, the connector 2 is an arc-shaped plate. The arc-shaped plate can reduce the friction between the device and the foundation, making it easier to insert the device into the foundation. An openable arc-shaped plate is provided at the wider gap between the two arc-shaped plates. One side of the openable arc-shaped plate is hinged to one arc-shaped plate by a hinge, and the other side is detachably connected to another arc-shaped plate, which facilitates the removal of the pile to be pulled out.

[0035] Vibration component 3 uses, but is not limited to, the existing Xinmingyu Machinery model TDZ40 vibratory hammer; The first nozzle 602, the second nozzle 603, and the third nozzle 810 adopt, but are not limited to, the existing long-endowment spray single-piece external thread conical nozzle. The high-pressure liquid sprayed has a conical spray range, which has a large coverage area and facilitates the insertion of the lower sleeve 4.

[0036] The liquid supply equipment uses, but is not limited to, existing high-pressure water pumps.

[0037] The lower sleeve 4 has a first mounting hole 401, and there are multiple first mounting holes 401, which are evenly arranged circumferentially along the lower sleeve 4. A first hinge shaft 403 is provided inside the first mounting hole 401, and the axis of the first hinge shaft 403 is perpendicular to the axis of the lower sleeve 4. A first hinge hole 702 is provided on the limiting arm 7, and the first hinge shaft 403 is located inside the first hinge hole 702. The first hinge hole 702 is located at the lower end of the limiting arm 7 and on the side away from the axis of the lower sleeve 4.

[0038] A limiting plate 703 corresponding to the outer side wall of the lower sleeve 4 is fixed on the side wall of the lower end of the limiting arm 7 away from the axis of the lower sleeve 4. When the limiting arm 7 is set vertically, the limiting plate 703 limits the limiting arm 7 to prevent the upper end of the limiting arm 7 from rotating to the outside of the lower sleeve 4. The edge of the lower end of the limiting arm 7 near the axis of the lower sleeve 4 adopts a rounded chamfer structure to facilitate the rotation of the limiting arm 7 along the first hinge axis 403. A first support plate 404 corresponding to the lower end face of the first mounting hole 401 is fixed on the inner side of the lower sleeve 4. When the limiting arm 7 is set horizontally, the first support plate 404 supports the limiting arm 7. The first support plate 404 plays the role of supporting the limiting arm 7 and improves the strength of the limiting arm 7 when supporting the pile 5 to be extracted.

[0039] In some embodiments, when the upper end of the limiting arm 7 is lower than the lower end of the pile to be pulled 5, the upper end of the limiting arm 7 rotates downward under the action of gravity, thereby achieving the supporting effect on the lower end of the pile to be pulled 5.

[0040] In other embodiments, when the upper end of the limiting swing arm 7 is lower than the lower end of the pile to be pulled 5, a connecting rope is provided on the limiting plate 703. Pulling the connecting rope can also cause the limiting swing arm 7 to rotate. Under the combined action of gravity and the tension of the connecting rope, the upper end of the limiting swing arm 7 rotates downward, thus achieving the supporting effect on the lower end of the pile to be pulled 5. In other embodiments, when the upper end of the limiting arm 7 is lower than the lower end of the pile to be pulled 5, the upper end of the limiting arm 7 rotates downward under the combined action of tensile elastic force and gravity, thus achieving the supporting effect on the lower end of the pile to be pulled 5.

[0041] The lower sleeve 4 has a second mounting hole 402 at its lower end, corresponding to the first mounting hole 401. Multiple second mounting holes 402 are evenly arranged circumferentially along the lower sleeve 4. Each second mounting hole 402 has an opening on its lower end face. A flushing arm 8 is installed inside each second mounting hole 402. A second hinge shaft 405 is fixed inside the second mounting hole 402. A second hinge hole 801 is opened at the upper end of the flushing arm 8, and the second hinge shaft 405 is located inside the second hinge hole 801. A third nozzle 810 is provided at the lower end of the flushing arm 8, extending along the length of the flushing arm 8. The third nozzle 810 is configured such that when the flushing arm 8 is vertically positioned, the nozzle of the third nozzle 810 is oriented downwards; when the flushing arm 8 is horizontally positioned, the nozzle of the third nozzle 810 is oriented towards the axis of the lower sleeve 4. The upper end of the third nozzle 810 is connected to the outlet end of the liquid supply device via a hose. A first connecting shaft 701 is fixedly installed on the lower end of the flushing arm 8 and on the side near the axis of the lower sleeve 4. A second connecting shaft 802 is fixedly installed on the side of the limiting arm 7 near the axis of the lower sleeve 4. Connecting seats 901 are fixedly installed at both ends of the tension spring 9. The two connecting seats 901 of the tension spring 9 are hinged to the first connecting shaft 701 and the second connecting shaft 802, respectively.

[0042] The tension spring 9 not only provides tension during the downward rotation of the upper end of the limit arm 7 to facilitate the rotation of the limit plate 703 arm to support the pile to be pulled out 5, but also provides tension during the upward rotation of the lower end of the flushing arm 8 to facilitate the rotation of the flushing arm 8.

[0043] A second support plate 406 corresponding to the upper end face of the second mounting hole 402 is fixedly provided on the inner side of the lower sleeve 4. The edge of the upper end of the flushing arm 8 near the axis of the lower sleeve 4 adopts a rounded chamfer structure to facilitate the rotation of the flushing arm 8. When the flushing arm 8 is set horizontally, the second support plate 406 limits the flushing arm 8. The second support plate 406 plays a limiting role for the flushing arm 8 in the horizontal state, ensuring the effect of the flushing limiting cavity.

[0044] A mounting ring 6 corresponding to the second mounting hole 402 is fixed on the outer side of the lower sleeve 4. When the flushing arm 8 is set vertically, the mounting ring 6 limits the flushing arm 8. The setting of the mounting ring 6 not only improves the structural strength of the lower sleeve 4 at the second mounting hole 402 and prevents the lower sleeve 4 from deforming, but also limits the vertical state of the flushing arm 8 and prevents the lower end of the flushing arm 8 from rotating to the outside of the lower sleeve 4.

[0045] In some embodiments, the mounting ring 6 has a plurality of vertically arranged connecting holes 608, which are evenly arranged circumferentially along the mounting ring 6, and a first nozzle 602 is connected to the inner side of the lower end of the connecting hole 608.

[0046] In other embodiments, the mounting ring 6 has multiple vertically arranged connecting holes 608, which are evenly arranged circumferentially along the mounting ring 6. A second nozzle 603 is connected to the inner lower end of the connecting hole 608 corresponding to the flushing arm 8; a first nozzle 602 is connected to the inner lower end of the remaining connecting holes 608. The lower ends of the first nozzle 602, second nozzle 603, and third nozzle 810 are all higher than the lower end of the lower sleeve 4, preventing the foundation from impacting the first nozzle 602, second nozzle 603, and third nozzle 810. The impact of 10; a valve hole 609 is provided corresponding to the connecting hole 608 of the flushing arm 8. The valve hole 609 has an opening on the inner wall of the mounting ring 6. The valve hole 609 is horizontally set, and the diameter of the valve hole 609 is not less than the diameter of the connecting hole 608. One end of the valve hole 609 passes through the connecting hole 608, and the other end corresponds to the flushing arm 8. The valve hole 609 is located below the second hinge shaft 405. A valve core 60502 is provided inside the valve hole 609. The diameter of the valve core 60502 matches the inner diameter of the valve hole 609. One end of the valve core 60502 is threadedly connected to the crossbar 605. A baffle 60501 is fixedly installed at the end of the crossbar 605 away from the valve core 60502. The diameter of the baffle 60501 is larger than the diameter of the crossbar 605. An installation tube 607 corresponding to the valve hole 609 is fixedly installed inside the mounting ring 6. A limit ring 604 is threadedly connected to the outside of the mounting tube 607. The crossbar 605 is located inside the mounting tube 607. An annular limit boss 60401 is provided on the inner side of the end of the limit ring 604 away from the valve core 60502. A compression spring 606 is provided between 04 and baffle 60501; a liquid distribution pipe 601 is provided correspondingly for mounting ring 6, and multiple connecting pipes 60101 connected to connecting holes 608 are connected to the lower end of the liquid distribution pipe 601. The liquid distribution pipe 601 is connected to the liquid outlet of the liquid supply device; a first slot 808 is opened on the flushing swing arm 8, and a third nozzle 810 is threaded to the inner side of the lower end of the first slot 808. The upper end of the first slot 808 is connected to the second slot 809, and the second slot 809 is connected to the liquid outlet of the liquid supply device through a hose.

[0047] When the flushing arm 8 is in a vertical position, the flushing arm 8 presses against the baffle 60501 and drives the valve core 60502 to insert into the valve hole 609. At this time, the second nozzle 603 cannot spray high-pressure liquid, and the third nozzle 810 sprays high-pressure liquid. The high-pressure liquids sprayed by the third nozzle 810 and the first nozzle 602 are both set downwards, which facilitates the insertion of the lower sleeve 4 and reduces the use of high-pressure water.

[0048] During the rotation of the flushing arm 8, the clamping action on the baffle 60501 is released. At this time, the valve core 60502 is disengaged from the valve hole 609, and the second nozzle 603 sprays high-pressure water to facilitate the insertion of the lower sleeve 4.

[0049] In some embodiments, the number of the first nozzle 602, the second nozzle 603, and the third nozzle 810 are all three; In other embodiments, the number of the second nozzle 603 and the third nozzle 810 are both 3, and the number of the first nozzle 602 is 0-2; The flushing arm 8 has a receiving groove 803 corresponding to the baffle 60501. When the flushing arm 8 is set vertically, the crossbar 605 and the baffle 60501 are located inside the receiving groove 803, and the bottom end of the receiving groove 803 is pressed against the baffle 60501, and the valve core 60502 closes the connecting hole 608. When the flushing arm 8 is set horizontally, the valve core 60502 is reset under the elastic force of the compression spring 606, and the connecting hole 608 is in a connected state. The bottom end of the receiving groove 803 has a threaded groove 80301, and the threaded groove 80301 is threaded with a tightening bolt 80302. The setting of the tightening bolt 80302 facilitates the adjustment of the positioning position of the baffle 60501, and thus adjusts the angle at which the flushing arm 8 is rotated to release the tightening effect on the baffle 60501.

[0050] A mounting boss 807 is fixed on one side of the lower end of the flushing arm 8 near the axis of the lower sleeve 4, and a groove is opened on the other side. The groove is designed to facilitate the installation of the adjusting bolt 811. The edge of the lower end of the mounting boss 807 near the axis of the lower sleeve 4 has a rounded chamfer structure. A mounting groove 806 is opened on the lower end of the flushing arm 8. The mounting groove 806 has an opening on the end face of the mounting boss 807 near the axis of the lower sleeve 4. An adjusting plate 812 is provided in the mounting groove 806. The adjusting plate 812 protrudes from the opening of the mounting groove 806. The mounting groove 806 is provided with a strip hole 805 arranged along the width direction of the flushing arm 8. A guide shaft 8 is provided on the adjusting plate 812. 1201, the guide shaft 81201 is located inside the strip hole 805; the side wall of the mounting groove 806 has a threaded hole 804 corresponding to the adjusting plate 812, and the adjusting bolt 811 is threaded to the inside of the threaded hole 804. The adjusting bolt 811 limits the end face of the adjusting plate 812 away from the axis of the lower sleeve 4; the lower end of the adjusting plate 812 near the axis of the lower sleeve 4 adopts a rounded chamfer structure; by rotating the adjusting bolt 811, the limiting position of the adjusting plate 812 can be adjusted, thereby adjusting the distance between the limiting plate 703 and the axis of the pile to be pulled 5, so that the device is applicable to piles 5 of different diameters and the scope of application of the device is broadened.

[0051] The mounting boss 807 is positioned corresponding to the second connecting shaft 802. The mounting boss 807 protects the second connecting shaft 802 and reduces the impact of the foundation on the second connecting shaft 802 and the tension spring 9.

[0052] Work process: A method for extracting piles during construction includes the following steps: S1. The device is hoisted above the pile 5 to be extracted, and the lower sleeve 4 is inserted into the pile 5 (e.g., ...). Figure 16As shown), rotate the flushing arm 8 downwards to make it vertically positioned, so that the flushing arm 8 is in contact with the outer surface of the pile to be pulled 5 (as shown). Figure 17 As shown), the tension spring 9 is further stretched; S2. Activate the vibration assembly 3 and the liquid supply device. High-pressure liquid is sprayed downwards through the first nozzle 602 and the second nozzle 603 to soften the foundation below the lower casing 4. Under the vibration of the vibration assembly 3, the device moves downwards. During this process, the limiting swing arm 7 rotates to a vertical state under the drive of the pile to be pulled 5, and the tension spring 9 is further stretched (e.g., Figure 18 (as shown) S3. When the lower end of the scouring arm 8 is lower than the lower end of the pile to be extracted 5, under the tension of the tension spring 9, the lower end of the scouring arm 8 rotates upward, and the nozzle direction rotates to spray the foundation below the pile to be extracted 5, forming a limiting cavity, until the spraying arm reaches a horizontal state (e.g., Figure 19 (as shown) S4. When the upper end of the limiting arm 7 is lower than the lower end of the pile to be pulled 5, under the tension of the tension spring 9, the upper end of the limiting arm 7 rotates downward and enters the limiting cavity obtained by the injection in S3 (e.g., Figure 20 (as shown) S5. The upward pulling device limit swing arm 7 supports the pile to be pulled 5, driving the entire pile to be pulled 5 to move upward.

[0053] The first nozzle 602 sprays high-pressure water to soften the foundation, making it easier for the lower sleeve 4 to be inserted into the foundation. When the upper end of the limiting arm 7 is lower than the lower end of the pile to be extracted 5, the limiting arm 7 rotates. When the device is lifted upward, the limiting arm 7 supports the lower end face of the pile to be extracted 5. The bottom of the pile to be extracted 5 is lifted and raised, which drives the entire pile to be extracted 5 to move upward. Unlike the pile top hoisting method that relies on the tensile stress transmitted from top to bottom inside the pile body, this method not only improves the efficiency of pile extraction but also reduces stress damage to the pile body, ensuring the integrity of the pile to be extracted 5, thereby achieving the purpose of reuse.

[0054] When the lower end of the scouring arm 8 is lower than the lower end of the pile to be extracted 5, under the tension of the tension spring 9, the lower end of the scouring arm 8 rotates upward, and the nozzle direction rotates to spray the foundation below the pile to be extracted 5 to form a limiting cavity. When the foundation is hard soil, the limiting cavity is formed by the scouring of the scouring arm 8, which facilitates the rotation of the limiting arm 7, improves work efficiency, and expands the applicable range of the device.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pile extraction device for construction, characterized in that, include: The lower sleeve (4) is provided with a limiting swing arm (7). The lower end of the limiting swing arm (7) is hinged to the lower sleeve (4). When the limiting swing arm (7) is set vertically, the distance between the side wall of the limiting swing arm (7) near the axis of the lower sleeve (4) and the axis of the lower sleeve (4) is greater than the radius of the pile to be pulled (5). When the limiting swing arm (7) is set horizontally, the distance between the side wall of the limiting swing arm (7) near the axis of the lower sleeve (4) and the axis of the lower sleeve (4) is less than the radius of the pile to be pulled (5). The first nozzle (602) is located at the lower end of the lower sleeve (4). The nozzle of the first nozzle (602) is set downward. The upper end of the first nozzle (602) is connected to the liquid outlet of the liquid supply device. Connector (2), the lower end of which is connected to the lower sleeve (4), and the upper end of which is provided with a vibration component (3).

2. The pile extraction device for construction according to claim 1, characterized in that: The upper end of the connector (2) is fixedly connected to the upper sleeve (1), and the upper end of the upper sleeve (1) is fixedly connected to the vibration assembly (3); A reinforcing ring (101) is fixedly provided on the outside of the upper sleeve (1); The number of connectors (2) is two. The distance between the two connectors (2) on one side is greater than the diameter of the pile to be pulled (5), and the distance between the two connectors (2) on the other side is less than the diameter of the pile to be pulled (5). The connector (2) is a Larssen sheet pile.

3. The pile extraction device for construction according to claim 1, characterized in that: The lower sleeve (4) has a first mounting hole (401), and there are multiple first mounting holes (401) arranged circumferentially along the lower sleeve (4). The first mounting hole (401) is provided with a first hinge shaft (403) inside. The axis of the first hinge shaft (403) is set perpendicular to the axis of the lower sleeve (4). The limiting swing arm (7) is provided with a first hinge hole (702). The first hinge shaft (403) is located inside the first hinge hole (702). The first hinge hole (702) is located at the lower end of the limiting arm (7) and on the side away from the axis of the lower sleeve (4).

4. A pile extraction device for construction according to claim 3, characterized in that: A limiting plate (703) corresponding to the outer side wall of the lower sleeve (4) is fixed on the side wall of the lower end of the limiting arm (7) away from the axis of the lower sleeve (4). When the limiting arm (7) is set vertically, the limiting plate (703) limits the limiting arm (7). The lower end of the limiting swing arm (7) near the axis of the lower sleeve (4) adopts a rounded chamfer structure; The lower sleeve (4) is fixed with a first support plate (404) corresponding to the lower end face of the first mounting hole (401). When the limiting swing arm (7) is set horizontally, the first support plate (404) supports the limiting swing arm (7).

5. A pile extraction device for construction according to claim 3, characterized in that: The lower sleeve (4) has a second mounting hole (402) at its lower end that corresponds to the first mounting hole (401). There are multiple second mounting holes (402), which are evenly arranged circumferentially along the lower sleeve (4). The second mounting holes (402) have openings on the lower end face of the lower sleeve (4). The second mounting hole (402) is provided with a flushing arm (8), and a second hinge shaft (405) is fixed inside the second mounting hole (402). The upper end of the flushing arm (8) is provided with a second hinge hole (801), and the second hinge shaft (405) is located inside the second hinge hole (801). The lower end of the flushing arm (8) is provided with a third nozzle (810). The third nozzle (810) is arranged along the length direction of the flushing arm (8). When the flushing arm (8) is vertically arranged, the nozzle of the third nozzle (810) is set downward. When the flushing arm (8) is horizontally arranged, the nozzle of the third nozzle (810) is set in the axial direction of the downward sleeve (4). The upper end of the third nozzle (810) is connected to the liquid outlet of the liquid supply device via a hose; A first connecting shaft (701) is fixed at the lower end of the flushing arm (8) and on the side near the axis of the lower sleeve (4). A second connecting shaft (802) is fixed at the side of the limiting arm (7) near the axis of the lower sleeve (4). Connecting seats (901) are fixed at both ends of the tension spring (9). The two connecting seats (901) of the tension spring (9) are hinged to the first connecting shaft (701) and the second connecting shaft (802) respectively.

6. A pile extraction device for construction according to claim 5, characterized in that: The lower sleeve (4) is fixed with a second support plate (406) corresponding to the upper end face of the second mounting hole (402), and the edge of the upper end of the scouring arm (8) near the axis of the lower sleeve (4) adopts a rounded chamfer structure. When the flushing arm (8) is set horizontally, the second support plate (406) limits the flushing arm (8); The lower sleeve (4) is fixed with a mounting ring (6) corresponding to the second mounting hole (402) on the outside. When the flushing arm (8) is set vertically, the mounting ring (6) limits the flushing arm (8).

7. A pile extraction device for construction according to claim 5, characterized in that: The lower sleeve (4) is fixedly provided with a mounting ring (6) corresponding to the second mounting hole (402) on the outside; The mounting ring (6) has a plurality of vertically arranged connecting holes (608), which are evenly arranged circumferentially along the mounting ring (6). A second nozzle (603) is connected to the inner side of the lower end of the connecting hole (608) corresponding to the flushing arm (8). The lower inner side of the remaining connecting hole (608) is connected to the first nozzle (602); The lower ends of the first nozzle (602), the second nozzle (603), and the third nozzle (810) are all higher than the lower end of the lower sleeve (4); A valve hole (609) is provided in the corresponding connecting hole (608) of the flushing arm (8). The valve hole (609) has an opening on the inner side wall of the mounting ring (6). The valve hole (609) is horizontally set, and the diameter of the valve hole (609) is not less than the diameter of the connecting hole (608). One end of the valve hole (609) passes through the connecting hole (608), and the other end corresponds to the flushing arm (8). The valve hole (609) is located below the second hinge shaft (405). A valve core (60502) is provided inside the valve hole (609). The diameter of the valve core (60502) matches the inner diameter of the valve hole (609). One end of the valve core (60502) is threadedly connected to the crossbar (605). A baffle (60501) is fixedly provided at the end of the crossbar (605) away from the valve core (60502). The diameter of the baffle (60501) is larger than the diameter of the crossbar (605). The mounting ring (6) has a mounting tube (607) corresponding to the valve hole (609) fixed inside. The mounting tube (607) is threaded with a limit ring (604) on the outside. The crossbar (605) is located inside the mounting tube (607). The limit ring (604) has an annular limit boss (60401) on the inner side of the end away from the valve core (60502). A compression spring (606) is provided between the limit ring (604) and the baffle (60501). The mounting ring (6) is provided with a liquid distribution pipe (601). The lower end of the liquid distribution pipe (601) is connected to a plurality of connecting pipes (60101) that are connected to the connecting hole (608). The liquid distribution pipe (601) is connected to the liquid outlet of the liquid supply device. The flushing arm (8) has a first slot (808), and the third nozzle (810) is threaded to the inner side of the lower end of the first slot (808). The upper end of the first slot (808) is connected to the second slot (809), and the second slot (809) is connected to the liquid outlet of the liquid supply device through a hose.

8. A pile extraction device for construction according to claim 7, characterized in that: The flushing arm (8) has a storage groove (803) corresponding to the baffle (60501); When the flushing arm (8) is set vertically, the crossbar (605) and the baffle (60501) are located inside the storage groove (803), the bottom end of the storage groove (803) is pressed against the baffle (60501), and the valve core (60502) closes the connection hole (608). When the flushing arm (8) is set horizontally, the valve core (60502) is reset under the elastic force of the compression spring (606), and the connecting hole (608) is in a connected state; The bottom end of the storage slot (803) has a threaded groove (80301), and a tightening bolt (80302) is threadedly connected inside the threaded groove (80301).

9. A pile extraction device for construction according to claim 5, characterized in that: The lower end of the flushing swing arm (8) is fixed with a mounting boss (807) on one side near the axis of the lower sleeve (4), and a groove is opened on the other side. The lower end of the mounting boss (807) near the axis of the lower sleeve (4) adopts a rounded chamfer structure. The lower end of the flushing arm (8) has an installation groove (806). The installation groove (806) has an opening on the end face of the mounting boss (807) near the axis of the lower sleeve (4). An adjustment plate (812) is provided in the installation groove (806). The adjustment plate (812) protrudes from the opening of the installation groove (806). The installation groove (806) is provided with a strip hole (805) arranged along the width direction of the flushing arm (8). A guide shaft (81201) is provided on the adjustment plate (812). The guide shaft (81201) is located inside the strip hole (805). The mounting groove (806) has a threaded hole (804) corresponding to the adjusting plate (812) on its side wall. The adjusting bolt (811) is threaded into the inside of the threaded hole (804). The adjusting bolt (811) limits the end face of the adjusting plate (812) away from the axis of the lower sleeve (4). The lower edge of the adjusting plate (812) near the axis of the lower sleeve (4) adopts a rounded chamfer structure; The mounting boss (807) is positioned corresponding to the second connecting shaft (802).

10. A method for extracting piles using the pile extraction device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. The device is suspended above the pile to be pulled (5). The lower sleeve (4) is aligned with the pile to be pulled (5) and inserted. The flushing arm (8) is rotated downward so that the flushing arm (8) is set vertically. The flushing arm (8) is in contact with the outer surface of the pile to be pulled (5), and the tension spring (9) is further stretched. S2. Turn on the vibration assembly (3) and turn on the liquid supply equipment. High pressure liquid is sprayed downward through the first nozzle (602) and the second nozzle (603) to soften the foundation below the lower sleeve (4). Under the vibration action of the vibration assembly (3), the device moves downward. During this process, the limit swing arm (7) rotates to a vertical state under the drive of the pile to be pulled (5), and the tension spring (9) is further stretched. S3. When the lower end of the scouring arm (8) is lower than the lower end of the pile to be pulled (5), under the tension of the tension spring (9), the lower end of the scouring arm (8) rotates upward, and the nozzle direction rotates to spray the foundation below the pile to be pulled (5) to form a limiting cavity until the spraying arm is in a horizontal state. S4. When the upper end of the limiting arm (7) is lower than the lower end of the pile to be pulled (5), the upper end of the limiting arm (7) rotates downward under the tension of the tension spring (9) and enters the limiting cavity obtained by the S3 spray. S5. Pull the upward device limit swing arm (7) to support the pile to be pulled (5) and drive the entire pile to be pulled (5) to move upward.

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