Sleeve pile and method of driving the same

Abstract

The present application relates to a kind of sleeve joint pile and its pile sinking method, belong to foundation construction technical field.The sleeve joint pile includes multiple sleeve and one-way locking assembly;Multiple sleeve is sequentially set from inside to outside, and in each adjacent two sleeve, the sleeve in outer layer can be lifted relative to the sleeve in inner layer along axial direction, and the bottom end of the sleeve in innermost layer forms pile tip;One-way locking assembly is connected between adjacent two sleeve, for limiting the falling movement of outer layer sleeve relative to inner layer sleeve along axial direction.The pile length of the sleeve joint pile provided by the present application can be stretched as needed to increase pile sinking depth, and can be applied to the working condition that pile length and pile sinking depth cannot be determined in advance.

Description

Technical Field

[0001] This invention belongs to the field of basic engineering technology, and in particular relates to a segmented pile and its driving method. Background Technology

[0002] Pile foundations are a common foundation structure in building construction. A pile foundation typically consists of multiple individual piles, each with fixed cross-sectional dimensions and length. During pile foundation construction, a pile hammer is usually used, relying on the vibration or impact of the hammer to drive the piles.

[0003] The key to constructing pile foundations lies in conducting prior geological surveys to calculate the required pile length and driving depth to achieve the design bearing capacity, thereby selecting appropriately sized piles and determining the pile driving construction plan. However, in some cases, it is impossible to conduct geological exploration to obtain geological data, making it impossible to determine the pile length and driving depth in advance. In such situations, traditional pile foundation structures are not applicable.

[0004] Therefore, how to construct pile foundations when the pile length and driving depth cannot be determined in advance is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a sleeve pile and its driving method. The length of the sleeve pile can be stretched as needed to increase the driving depth, making it suitable for working conditions where the pile length and driving depth cannot be determined in advance.

[0006] This invention provides a sleeve pile, comprising:

[0007] The sleeve consists of multiple sections, which are installed sequentially from the inside to the outside. In each pair of adjacent sleeve sections, the outer sleeve can be lifted axially relative to the inner sleeve, and the bottom end of the innermost sleeve forms a pile tip.

[0008] A one-way locking assembly, connected between two adjacent sleeve sections, is used to restrict the axial downward movement of the outer sleeve relative to the inner sleeve.

[0009] In this technical solution, the sleeve pile is constructed by sequentially connecting multiple sleeves. The pile length is extended by lifting the outer sleeve relative to the inner sleeve. At the same time, the downward movement of the outer sleeve relative to the inner sleeve is restricted by a one-way locking component, so that the sleeve pile can only be extended and cannot be shortened. Therefore, the pile length of the sleeve pile can be stretched as needed to increase the pile driving depth, enabling the construction of pile foundations in working conditions where the pile length and pile driving depth cannot be determined in advance.

[0010] In some embodiments, the one-way locking component includes:

[0011] The mounting groove is provided on the inner wall of the outer sleeve or the outer wall of the inner sleeve and extends along the axial direction of the sleeve.

[0012] Multiple eccentric blocks are distributed in the mounting groove. One end of each eccentric block is rotatably connected to the mounting groove, and the eccentric block can rotate freely relative to the mounting groove.

[0013] Multiple recesses are formed on the cylinder wall of the adjacent sleeve opposite to the mounting groove. The multiple recesses are distributed along the axial direction of the sleeve. The shape of the recesses matches the shape of the end of the offset block away from the mounting groove so that the offset block can slide into it.

[0014] The one-way locking component used in this technical solution can effectively restrict the downward movement of the outer sleeve relative to the inner sleeve, but allow the outer sleeve to be freely lifted relative to the inner sleeve, so that the sleeve pile can only be lengthened and not shortened, while not affecting the downward transmission of the upper load. When the pile is driven downward, it can effectively transmit the upper load to the pile tip, realizing the breaking ground and pile driving.

[0015] In some embodiments, when the mounting groove is provided on the inner wall of the outer sleeve, the recess is formed on the outer wall of the inner sleeve, the top surface of the recess is inclined, and the bottom surface of the recess is horizontal; when the mounting groove is provided on the outer wall of the inner sleeve, the recess is formed on the inner wall of the outer sleeve, the top surface of the recess is horizontal, and the bottom surface of the recess is inclined.

[0016] In some embodiments, multiple eccentric blocks are equidistantly distributed along the axial direction of the sleeve, and multiple recesses are equidistantly distributed along the axial direction of the sleeve. The distribution spacing of the eccentric blocks and the distribution spacing of the recesses are not equal. In this technical solution, the eccentric blocks and recesses are distributed in this way, which can be combined to form a lifting step distance smaller than the distribution spacing of the eccentric blocks and the distribution spacing of the recesses. This allows the sleeve to be stopped at any height as much as possible, thereby meeting the different pile length requirements under different construction conditions as much as possible.

[0017] In some embodiments, there are multiple sets of one-way locking components, which are evenly distributed along the circumference of the sleeve.

[0018] In some embodiments, the sleeve pile further includes a limiting component connected between two adjacent sleeve sections to limit the highest lifting position of the outer sleeve relative to the inner sleeve. In this technical solution, the limiting component prevents the outer sleeve from being excessively lifted and thus detaching from the inner sleeve.

[0019] In some embodiments, the limiting component includes:

[0020] The slide is provided on the inner wall of the outer sleeve and extends along the axial direction of the outer sleeve;

[0021] The slider is located on the outer wall of the inner sleeve and near the top edge of the inner sleeve. The slider is slidably connected to the slide rail.

[0022] The stop block is located inside the slide rail and at the lower part of the outer sleeve, below the slider;

[0023] When the outer sleeve is raised to its highest position relative to the inner sleeve, the slider and the stop block abut against each other.

[0024] In this technical solution, the sliding block on the outer wall of the inner sleeve and the stop block on the inner wall of the outer sleeve mutually abut each other, which limits the further lifting of the outer sleeve relative to the inner sleeve, and can effectively prevent the outer sleeve from being lifted too much and causing it to detach from the inner sleeve.

[0025] In some embodiments, there are multiple sets of limiting components, which are evenly distributed along the circumference of the sleeve.

[0026] In some embodiments, the sleeve pile further includes a sleeve locking assembly connected between two adjacent sleeve sections to lock the outer sleeve and the inner sleeve together. In this technical solution, the sleeve locking assembly ensures that the outer sleeve and inner sleeve are locked together after the outer sleeve is raised to its highest position, preventing accidents.

[0027] In some embodiments, the sleeve locking assembly includes:

[0028] The locking pin is slidably connected to the wall of the outer sleeve. The locking pin extends radially along the outer sleeve and can reciprocate relative to the outer sleeve radially. The inner sleeve has a pin hole for the locking pin to be inserted into.

[0029] A driving component, used to drive the locking pin into the pin hole;

[0030] When the outer sleeve is raised to the highest position relative to the inner sleeve, the locking pin aligns with the pin hole, and the driving component drives the locking pin to insert into the pin hole.

[0031] In this technical solution, the locking of two adjacent sleeves is achieved by the cooperation of the locking pin on the outer sleeve and the pin hole on the inner sleeve.

[0032] In some embodiments, the driver includes:

[0033] A baffle plate, which is connected to the outer periphery of the locking pin;

[0034] A spring, which connects the inner wall of the outer sleeve to the baffle plate;

[0035] When the outer sleeve has not reached the highest lifting position, the spring is compressed so that the inner end of the locking pin abuts against the outer wall of the inner sleeve; when the outer sleeve is raised to the highest lifting position relative to the inner sleeve, the spring returns to its length so that the inner end of the locking pin is inserted into the pin hole.

[0036] In this technical solution, the locking pin can be automatically driven to lock the inner sleeve when the outer sleeve is lifted into position, through the cooperation of the baffle and the spring.

[0037] In some embodiments, a locking pin passes through the wall of the outer sleeve, and a notch is provided on the inner wall of the next outer sleeve adjacent to the outer sleeve. When the outer sleeve has not reached its highest lifting position, the outer end of the locking pin engages with the notch. When the outer sleeve is raised to its highest lifting position relative to the inner sleeve, the locking pin inserts into the pin hole while its outer end disengages from the notch. In this technical solution, through the cooperation of the locking pin with the notch and the pin hole, the release of the next sleeve can be automatically achieved while the previous sleeve is locked, making the pile driving operation of the segmented pile more controllable.

[0038] In some embodiments, there are multiple sets of sleeve locking components, which are evenly distributed along the circumference of the sleeve.

[0039] In addition, the present invention also provides a method for driving segmented piles, comprising the following steps:

[0040] (1) Erect the sleeve pile and insert the tip of the innermost sleeve of the sleeve pile into the soil layer at the preset pile driving position.

[0041] (2) Multiple jacking devices are arranged around the sleeve pile, and the load is pressed on the top of the sleeve pile and the jacking device so that the sleeve pile and the jacking device jointly support the load. The top of the sleeve of the sleeve pile is detachably connected to the bottom of the load.

[0042] (3) Use the jacking device to lift the load so that the load pulls the other sleeves of the sleeve pile except the innermost sleeve. When lifting, the sleeve is pulled out from the adjacent sleeves layer by layer from the inside to the outside until the preset jacking stroke of the jacking device is reached.

[0043] (4) Control the jacking device to retract so that the load falls and the load uses its gravity to press the sleeve pile into the soil layer;

[0044] (5) Repeat steps (3) and (4) until the top of the segmented pile is stable at the preset elevation under the preset pressure.

[0045] The pile driving method for segmented piles provided by this technical solution does not require prior geological exploration. It only requires providing a sufficient total length of the sleeve to enable the segmented piles to achieve the single pile bearing capacity and preset elevation required for construction, which is conducive to expanding the applicable scope of pile foundation construction.

[0046] Based on the above technical solution, the segmented pile provided by this invention can realize the construction of pile foundations even when the pile length and driving depth cannot be determined in advance. Furthermore, by using the segmented pile provided by this invention as a building foundation, after the building is completed, when ground settlement occurs, the building can be lifted by lengthening the segmented pile, thus maintaining the building's design elevation and horizontal orientation, thereby resisting the effects of ground settlement. Attached Figure Description

[0047] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0048] Figure 1 This is a perspective view of one embodiment of the sleeve pile of the present invention;

[0049] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0050] Figure 3 This is a front view of the outermost sleeve in an embodiment of the sleeve pile of the present invention when it is in an unlifted state;

[0051] Figure 4 This is a top view of the outermost sleeve in an embodiment of the sleeve pile of the present invention when it is in an unlifted state;

[0052] Figure 5 For along Figure 4 Sectional view of the middle BB line;

[0053] Figure 6 for Figure 5 A magnified view of a section at point C;

[0054] Figure 7 for Figure 5 A magnified view of a section at point D;

[0055] Figure 8 This is a schematic diagram illustrating the process of locking the inner sleeve with the locking pin and simultaneously unlocking the outer sleeve in one embodiment of the sleeve pile of the present invention;

[0056] Figure 9 This is a schematic diagram of the construction process of one embodiment of the pile driving method for the sleeve pile of the present invention;

[0057] Figure 10 This is a schematic diagram of the one-way locking component in another embodiment of the sleeve pile of the present invention.

[0058] In the picture:

[0059] 1. Segmented pile; 2. Lifting device; 3. Loading material; 4. Soil layer;

[0060] 11. Sleeve; 12. One-way locking assembly; 13. Limiting assembly; 14. Sleeve locking assembly;

[0061] 111. Inner sleeve; 112. Outer sleeve; 113. Further outer sleeve; 1101. Pin hole;

[0062] 121. Mounting slot; 1211. First rib; 122. Offset block; 123. Recess; 124. Rotating shaft;

[0063] 131. Slide; 1311. Second rib; 132. Slider; 133. Stop;

[0064] 141. Locking pin; 142. Driving component; 1421. Baffle; 1422. Spring; 143. Bayonet. Detailed Implementation

[0065] The technical solutions in the embodiments of the present invention 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 the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0066] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0067] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0068] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0069] As attached Figures 1-6As shown, in an illustrative embodiment of the sleeve pile 1 of the present invention, the sleeve pile 1 includes multiple sleeves 11, which are sequentially sleeved from the inside to the outside; in each pair of adjacent sleeves 11, the outer sleeve 112 can be lifted axially relative to the inner sleeve 111, and the bottom end of the innermost sleeve 11 forms a pile tip; a one-way locking assembly 12 is connected between adjacent sleeves 11, which is used to restrict the axial downward movement of the outer sleeve 112 relative to the inner sleeve 111.

[0070] The aforementioned segmented pile 1 is constructed by sequentially connecting multiple sleeves 11. By lifting the outer sleeve 112 relative to the inner sleeve 111, the pile length can be extended as needed during construction. Simultaneously, a one-way locking component 12 restricts the downward movement of the outer sleeve 112 relative to the inner sleeve 111, ensuring that the segmented pile 1 can only be extended and not shortened. This allows the load applied to the pile top during pile driving to be effectively transferred to the pile tip at the bottom, facilitating pile driving. Therefore, the pile length of the aforementioned segmented pile 1 can be stretched as needed to increase the pile driving depth, enabling the construction of pile foundations even when the pile length and driving depth cannot be determined in advance. Furthermore, using the aforementioned segmented pile 1 as a building foundation, for some low-height and lightweight structures, such as platforms and bridge decks, after the building is completed and the foundation settles, the building can be lifted by extending the length of the segmented pile 1, maintaining the design elevation and horizontal orientation, thereby resisting the effects of foundation settlement.

[0071] In the above-mentioned sleeve pile 1, it should be noted that the length of each sleeve 11 is preferably the same, which is convenient for processing the sleeve 11 and for storing the sleeve 11; the length of the sleeve 11 should not be too long, as it is inconvenient for transportation.

[0072] like Figure 6As shown, in this embodiment, the one-way locking assembly 12 specifically includes a mounting groove 121, a plurality of offset blocks 122, and a plurality of recesses 123; the mounting groove 121 is disposed on the inner wall of the outer sleeve 112 and extends along the axial direction of the outer sleeve 112; the plurality of offset blocks 122 are distributed in the mounting groove 121, one end of the offset block 122 is rotatably connected to the mounting groove 121, and the offset block 122 can rotate freely relative to the mounting groove 121; the recesses 123 are formed on the outer wall of the inner sleeve 111, the plurality of recesses 123 are distributed along the axial direction of the inner sleeve 111, and the shape of the recesses 123 matches the shape of the end of the offset block 122 away from the mounting groove 121 so that the offset block 122 can slide into it. During construction, the axis of sleeve 11 is vertical. When the outer sleeve 112 falls relative to the inner sleeve 111, the end of the offset block 122 away from the mounting groove 121 slides downward against the outer wall of the inner sleeve 111. When it reaches the recess 123, the end of the offset block 122 away from the mounting groove 121 slides into the recess 123, thus restricting the downward movement of the outer sleeve 112 relative to the inner sleeve 111. When the outer sleeve 112 is lifted relative to the inner sleeve 111, the end of the offset block 122 located in the recess 123 rotates and slides out of the recess 123, and all the ends of the offset blocks 122 away from the mounting groove 121 slide upward against the outer wall of the inner sleeve 111 and pass through the recess 123. It should be noted that in this embodiment, the mounting groove 121 extends from one end of the sleeve 11 to the other end. It should also be noted that in this embodiment, as... Figure 4 As shown, the mounting groove 121 is defined by two first ribs 1211 welded to the inner wall of the sleeve 11; as Figure 6 As shown, the eccentric block 122 is rotatably connected to the mounting groove 121 via a rotating shaft 124 to ensure that it can rotate freely relative to the mounting groove 121. The one-way locking assembly 12 of the above structure can effectively restrict the downward movement of the outer sleeve 112 relative to the inner sleeve 111, but allows the outer sleeve 112 to be freely lifted relative to the inner sleeve 111, so that the sleeve pile 1 can only be lengthened and not shortened, while not affecting the downward transmission of the upper load. When the pile is driven downward, it can effectively transmit the upper load to the pile tip to achieve the breaking ground and pile driving. Moreover, the one-way locking assembly 12 of the above structure is simple in structure, easy to process and easy to install on the cylinder wall of the sleeve 11.

[0073] like Figure 6 As shown, in this embodiment, when the axis of the sleeve 11 is in a vertical state, the top surface of the recess 123 is inclined so that the weight block 122 can slide into the recess 123 and slide out of the recess 123; the bottom surface of the recess 123 is horizontal so as to lock the weight block 122 and prevent the outer sleeve 112 from sliding down.

[0074] like Figure 6As shown, multiple eccentric blocks 122 are equidistantly distributed along the axial direction of the outer sleeve 112, and multiple recesses 123 are equidistantly distributed along the axial direction of the inner sleeve 111. The distribution spacing of the eccentric blocks 122 and the distribution spacing of the recesses 123 are not equal. This distribution of the eccentric blocks 122 and the recesses 123 allows for a lifting step distance smaller than the distribution spacing of the eccentric blocks 122 and the recesses 123. Specifically, between two adjacent engagements of the eccentric blocks 122 and the recesses 123, the minimum lifting distance of the outer sleeve 112 is smaller than both the distribution spacing of the eccentric blocks 122 and the distribution spacing of the recesses 123. This allows the sleeve 11 to remain at any height as much as possible, thereby maximizing the satisfaction of different pile length requirements under various construction conditions.

[0075] It is understood that, in another embodiment, such as Figure 10 As shown, the difference from the above embodiment is that the mounting groove 121 is provided on the outer wall of the inner sleeve 111, and the recess 123 is formed on the inner wall of the outer sleeve 112. During construction, the eccentric block 122 located or sliding to the recess 123 loses the support of the inner wall of the outer sleeve 112 and flips outward and slides into the recess 123 of the outer sleeve 112, thereby restricting the downward movement of the outer sleeve 112 relative to the inner sleeve 111; when the outer sleeve 112 is lifted relative to the inner sleeve 111, the eccentric block 122 with its end located in the recess 123 rotates inward and slides out of the recess 123 under the drive of the upward movement of the outer sleeve 112, thereby releasing the movement restriction between the outer sleeve 112 and the inner sleeve 111. It should also be noted that, when the sleeve 11 is vertical, the top surface of the recess 123 is horizontal, which locks the weight block 122 and prevents the outer sleeve 112 from sliding down; the bottom surface of the recess 123 is inclined so that the weight block 122 can slide out of the recess 123.

[0076] To ensure that the sleeve pile 1 does not retract and to avoid accidents, such as Figure 4 As shown, there are multiple sets of one-way locking components 12, which are evenly distributed along the circumference of the sleeve 11.

[0077] Furthermore, to prevent the outer sleeve 112 from being excessively lifted and thus detaching from the inner sleeve 111, such as... Figure 1 and Figure 7 As shown, the sleeve pile 1 also includes a limiting component 13, which is connected between two adjacent sleeve sections 11 and is used to limit the highest lifting position of the outer sleeve 112 relative to the inner sleeve 111.

[0078] like Figure 2 and Figure 7As shown, in this embodiment, the limiting component 13 specifically includes a slide rail 131, a slider 132, and a stop block 133; the slide rail 131 is disposed on the inner wall of the outer sleeve 112 and extends along the axial direction of the outer sleeve 112; the slider 132 is disposed on the outer wall of the inner sleeve 111 and close to the top edge of the inner sleeve 111, and the slider 132 is slidably connected to the slide rail 131; the stop block 133 is disposed in the slide rail 131 and located at the lower part of the outer sleeve 112, and the stop block 133 is located below the slider 132; wherein, when the outer sleeve 112 is raised to the highest raised position relative to the inner sleeve 111, the slider 132 abuts against the stop block 133. In this embodiment, the mutual abutment between the slider 132 on the outer wall of the inner sleeve 111 and the stop 133 on the inner wall of the outer sleeve 112 restricts further lifting of the outer sleeve 112 relative to the inner sleeve 111, effectively preventing the outer sleeve 112 from excessively lifting and disengaging from the inner sleeve 111. Simultaneously, the limiting effect of the slide rail 131 on the inner wall of the outer sleeve 112 on the slider 132 on the outer wall of the inner sleeve 111 effectively prevents relative rotation between the outer sleeve 112 and the inner sleeve 111, preventing the offset block 122 and the recess 123 in the one-way locking assembly 12 from failing due to misalignment. It should be noted that, as... Figure 4 As shown, in this embodiment, the slide 131 is defined by two second ribs 1311 welded to the inner wall of the sleeve 11.

[0079] To ensure that the outer sleeve 112 and the inner sleeve 111 do not detach and to prevent accidents, while also ensuring the verticality of the sleeve 11 during lifting, such as Figure 4 As shown, there are multiple sets of limiting components 13, which are evenly distributed along the circumference of the sleeve 11.

[0080] To ensure that the outer sleeve 112 is locked to the inner sleeve 111 after being raised to its highest position, thus preventing any further relative displacement between the outer sleeve 112 and the inner sleeve 111 and avoiding accidents, such as... Figure 1 and Figure 7 As shown, the sleeve pile 1 also includes a sleeve locking assembly 14, which is connected between two adjacent sleeve sections 11 and is used to lock the outer sleeve 112 and the inner sleeve 111.

[0081] like Figure 7As shown, in this embodiment, the sleeve locking assembly 14 specifically includes a locking pin 141 and a driving member 142; the locking pin 141 is slidably connected to the cylinder wall of the outer sleeve 112, the locking pin 141 extends radially along the outer sleeve 112 and can reciprocate relative to the outer sleeve 112 radially, and the cylinder wall of the inner sleeve 111 is provided with a pin hole 1101 for the locking pin 141 to be inserted; the driving member 142 is used to drive the locking pin 141 to be inserted into the pin hole 1101; wherein, when the outer sleeve 112 is raised to the highest raised position relative to the inner sleeve 111, the locking pin 141 is aligned with the pin hole 1101, and the driving member 142 drives the locking pin 141 to be inserted into the pin hole 1101. In this embodiment, the locking pin 141 provided on the outer sleeve 112 cooperates with the pin hole 1101 provided on the inner sleeve 111 to lock the two adjacent sleeves 11. The sleeve locking assembly 14 has a simple structure and is easy to process and install. It should be noted that in this embodiment, both the locking pin 141 and the driving member 142 are provided in the slide rail 131.

[0082] Furthermore, in order to achieve automatic locking of the locking pin 141, such as Figure 7 As shown, in this embodiment, the driving component 142 specifically includes a baffle 1421 and a spring 1422; the baffle 1421 is connected to the outer periphery of the locking pin 141; the spring 1422 is connected between the inner wall of the outer sleeve 112 and the baffle 1421; wherein, when the outer sleeve 112 has not reached the highest lifting position, the spring 1422 is in a compressed state, so that the inner end of the locking pin 141 abuts against the outer wall of the inner sleeve 111; when the outer sleeve 112 is raised to the highest lifting position relative to the inner sleeve 111, the spring 1422 returns to its length, so that the inner end of the locking pin 141 is inserted into the pin hole 1101. In this embodiment, through the cooperation of the baffle 1421 and the spring 1422, the locking pin 141 can be automatically driven to lock the inner sleeve 111 when the outer sleeve 112 is raised to the position.

[0083] Furthermore, in order to ensure that the sleeve 11 is lifted layer by layer from the inside to the outside during pile driving, and that the next layer of sleeve 11 is automatically released while the previous layer of sleeve 11 is locked, such as... Figure 7 and Figure 8As shown, in this embodiment, the locking pin 141 passes through the cylinder wall of the outer sleeve 112, and the inner wall of the outermost sleeve 113 adjacent to the outer sleeve 112 is provided with a slot 143; when the outer sleeve 112 has not reached the highest lifting position, the outer end of the locking pin 141 is engaged with the slot 143; when the outer sleeve 112 is lifted relative to the inner sleeve 111 to the highest lifting position, the locking pin 141 is inserted into the pin hole 1101, and at the same time, the outer end of the locking pin 141 disengages from the slot 143. With this configuration, when the outer sleeve 112 is lifted, all other sleeves 11 located outside the outer sleeve 112 are locked. When the outer sleeve 112 is lifted to the highest lifting position, the locking pin 141 locks the outer sleeve 112 and the inner sleeve 111 while releasing the outer sleeve 113, allowing the outer sleeve 113 to be lifted. In this way, the sleeves 11 can be lifted layer by layer from the inside to the outside, and the next layer of sleeves 11 is automatically released while the previous layer of sleeves 11 is locked, making the pile driving operation of the sleeve pile 1 more controllable.

[0084] To ensure that the sleeve 11 is securely locked and to prevent accidents, the sleeve locking assembly 14 is in multiple sets, and the multiple sets of sleeve locking assemblies 14 are evenly distributed along the circumference of the sleeve 11.

[0085] Furthermore, it should be noted that the manufacturing and assembly process of the aforementioned sleeve pile 1 is as follows: First, the sleeve 11 is machined. The recess 123 and pin hole 1101 are directly machined onto the sleeve 11 during the machining of the sleeve 11. The first rib plate 1211 is pre-welded to the sleeve 11 in pairs to form the mounting groove 121. The second rib plate 1311 is pre-welded to the sleeve 11 in pairs to form the slide 131. The slider 132, stop 133, and bayonet 143 are also pre-welded to the sleeve 11. Then, the eccentric block 122 is installed in the mounting groove 121. During assembly, the sleeve 11 is erected to allow the eccentric block 122 to be installed. The weight 122 hangs down naturally under the action of gravity, and the sleeves 11 are installed layer by layer from the outside to the inside. After each layer of sleeves 11 is installed, the locking pin 141 is passed through the sleeve 11 and locked into the slot 143 of the adjacent outer sleeve 11. Then, the spring 1422 is installed between the baffle 1421 of the locking pin 141 and the inner wall of the sleeve 11 of that layer. The locking pin 141 is pressed outward and then inserted into the adjacent inner sleeve 11. The locking pin 141 is pressed tightly against the outer wall of the adjacent inner sleeve 11 under the action of the spring 1422. In this way, the sleeves 11 are assembled layer by layer from the outside to the inside to complete the assembly of the sleeve pile 1.

[0086] like Figure 9 As shown, based on the aforementioned sleeve pile 1, this embodiment of the invention also provides a method for driving sleeve piles, including the following steps:

[0087] (1) Erect the sleeve pile 1 and insert the pile tip of the innermost sleeve 11 of the sleeve pile 1 into the soil layer 4 at the preset pile driving position.

[0088] In this step, by inserting the pile tip of the innermost sleeve 11 into the soil layer 4 at the preset pile driving position, the accuracy of the pile driving position can be ensured.

[0089] (2) Multiple lifting devices 2 are arranged around the sleeve pile 1, and the load 3 is pressed on the top of the sleeve pile 1 and the lifting device 2 so that the sleeve pile 1 and the lifting device 2 jointly support the load 3, and the top end of the sleeve 11 of the sleeve pile 1 is detachably connected to the bottom of the load 3.

[0090] In this step, it should be noted that, in this embodiment, the lifting device 2 is specifically a jack. Before placing the load 3, the top surface of the lifting device 2 needs to be adjusted to be flush with the top surface of the sleeve pile 1 to facilitate the placement of the load 3. Preferably, the jack with a height consistent with the height of the sleeve pile 1 in its unlifted state is used as the lifting device 2. By controlling the jack to fully retract, the top surface of the lifting device 2 can be quickly made flush with the top surface of the sleeve pile 1. Furthermore, it should also be noted that, in this embodiment, the load 3 is specifically a weight, the weight of which is determined according to the required single pile bearing capacity. Furthermore, it should be noted that when the aforementioned sleeve locking assembly 14 is provided between two adjacent sleeve layers 11, and the sleeve locking assembly 14 includes the aforementioned locking pin 141, driving member 142, and bayonet 143, that is, when the outermost sleeve 113 is automatically released through the locking pin 141, only the outermost sleeve 11 needs to be connected to the bottom of the load 3, and the other sleeves 11 do not need to be connected to the bottom of the load 3; however, when the aforementioned sleeve locking assembly 14 is not provided, all sleeves 11 except the innermost sleeve 11 need to be connected to the bottom of the load 3 so that the load 3 can pull up all the other sleeve layers 11 except the innermost sleeve 11, and release the sleeve 11 by contacting the connection between each sleeve 11 and the load 3.

[0091] (3) Use the lifting device 2 to lift the load 3 so that the load 3 pulls the other sleeves 11 of the sleeve pile 1 except the innermost sleeve 11 to lift. During the lifting, the sleeves 11 are pulled out from the innermost sleeves 11 layer by layer from the innermost sleeves 11 until the preset lifting stroke of the lifting device 2 is reached.

[0092] In this step, it should be noted that the preset lifting stroke should be greater than the length of the sleeve 11 pulled out between two adjacent locking positions of the one-way locking component 12 during the sleeve 11 extraction process; most preferably, the preset lifting stroke is greater than the length of one sleeve 11 section. It should also be noted that when the above-mentioned limiting component 13 and sleeve locking component 14 are provided between two adjacent sleeves 11, and the limiting component 13 includes the above-mentioned slide 131, slider 132 and stop 133, and the sleeve locking component 14 includes the above-mentioned locking pin 141, driving component 142 and bayonet 143, the specific process of the load 3 pulling the sleeve 11 to lift is as follows: since all sleeves 11 except the innermost sleeve 11 are locked by the locking pin 141 and bayonet 143, when the load 3 pulls the sleeve 11 to lift, the innermost sleeve 11 is first pulled out from its adjacent sleeve 11. If the outer sleeve 112 adjacent to the innermost sleeve 11 is... If the innermost sleeve 11 is raised to its highest position but the preset lifting stroke of the lifting device 2 has not yet been reached, the slider 132 on the outer wall of the innermost sleeve 11 abuts against the stop block 133 on the inner wall of the adjacent outer sleeve 112 to limit further lifting of the outer sleeve 112 adjacent to the innermost sleeve 11. At the same time, the locking pin 141 passing through the wall of the outer sleeve 112 adjacent to the innermost sleeve 11 is inserted into the pin hole 1101 of the innermost sleeve 11 and disengaged from the bayonet 143 of the outermost sleeve 113 to lock the innermost sleeve 11 and release the outermost sleeve 113. This process continues until the preset lifting stroke of the lifting device 2 is reached. When the above-mentioned limiting component 13 and sleeve locking component 14 are not provided, it is necessary to manually observe and promptly disconnect the connection between the sleeve 11 and the load 3 from the inside out to release the sleeve 11 in a timely manner.

[0093] (4) Control the jacking device 2 to retract so that the load 3 falls, and the load 3 uses its gravity to press the sleeve pile 1 into the soil layer 4.

[0094] In this step, it should be noted that since the outer sleeve 112 cannot fall relative to the inner sleeve 111, that is, the length of the sleeve pile 1 cannot be retracted, the sleeve pile 1 will be pressed into the soil layer 4 under the gravity of the load 3, thus realizing the breaking of the soil and driving of the pile.

[0095] (5) Repeat steps (3) and (4) until the top of the sleeve pile 1 is stable at the preset elevation under the preset pressure.

[0096] In this step, it should be noted that the structural characteristics of the sleeve pile 1, which is thicker at the top and thinner at the bottom, cause the bending shear strength of the pile section and the single pile bearing capacity to increase with the increase of the penetration depth. The preset pressure is determined according to the single pile bearing capacity required by the single pile. When the top of the sleeve pile 1 can still be stable at the preset elevation under the preset pressure, it means that the sleeve pile 1 can achieve the single pile bearing capacity required for construction.

[0097] The above-mentioned method of driving segmented piles does not require prior geological exploration. It only requires providing a sufficient total length of the sleeve 11 to enable the segmented pile 1 to achieve the single pile bearing capacity and preset elevation required for construction, which is conducive to expanding the applicable scope of pile foundation construction.

[0098] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0099] 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 preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method for driving segmented piles, characterized in that, The sleeve pile includes: The sleeve consists of multiple sections, which are sequentially fitted from the inside out. In each pair of adjacent sleeve sections, the outer sleeve can be lifted axially relative to the inner sleeve, and the bottom end of the innermost sleeve forms a pile tip. A one-way locking assembly, connected between two adjacent sleeve sections, is used to restrict the axial downward movement of the outer sleeve relative to the inner sleeve. The one-way locking component includes: The mounting groove is disposed on the inner wall of the outer sleeve or the outer wall of the inner sleeve and extends along the axial direction of the sleeve; the mounting groove extends from one end of the sleeve to the other end. Multiple eccentric blocks are distributed in the mounting groove, one end of each eccentric block is rotatably connected to the mounting groove, and the eccentric block can rotate freely relative to the mounting groove. Multiple recesses are formed on the cylinder wall of the adjacent sleeve opposite to the mounting groove. The multiple recesses are distributed along the axial direction of the sleeve. The shape of the recesses matches the shape of the end of the offset block away from the mounting groove so that the offset block can slide into it. The plurality of the offset blocks are equidistantly distributed along the axial direction of the sleeve, and the plurality of the recesses are equidistantly distributed along the axial direction of the sleeve. The distribution spacing of the offset blocks is not equal to the distribution spacing of the recesses. The sleeve pile also includes a sleeve locking assembly, which is connected between two adjacent sleeve sections and is used to lock the outer sleeve and the inner sleeve. The sleeve locking assembly includes: A locking pin is slidably connected to the wall of the outer sleeve. The locking pin extends radially along the outer sleeve and can reciprocate relative to the outer sleeve radially. The inner sleeve has a pin hole for the locking pin to be inserted into its wall. A driving component is used to drive the locking pin into the pin hole; Specifically, when the outer sleeve is raised to its highest position relative to the inner sleeve, the locking pin aligns with the pin hole, and the driving member drives the locking pin to insert into the pin hole; the locking pin passes through the wall of the outer sleeve, and a bayonet is provided on the inner wall of the outermost sleeve adjacent to the outer sleeve; when the outer sleeve has not reached its highest position, the outer end of the locking pin is engaged with the bayonet; when the outer sleeve is raised to its highest position relative to the inner sleeve, the locking pin inserts into the pin hole while simultaneously disengaging from the bayonet; The method for driving the sleeve pile includes the following steps: (1) Without pre-determining the pile length and driving depth, the sleeve pile is directly erected and the pile tip of the innermost sleeve of the sleeve pile is inserted into the soil layer at the preset driving position. (2) Multiple lifting devices are arranged around the sleeve pile, and the load is pressed on the top of the sleeve pile and the lifting device so that the sleeve pile and the lifting device jointly support the load, and the top of the outermost sleeve of the sleeve pile is detachably connected to the bottom of the load; (3) Use the lifting device to lift the load so that the load pulls the other sleeves of the sleeve pile except the innermost sleeve. When lifting, the sleeve is pulled out from the adjacent sleeves layer by layer from the inside to the outside until the preset lifting stroke of the lifting device is reached. (4) Control the jacking device to retract so that the load falls, and the load uses its gravity to press the sleeve pile into the soil layer; (5) Repeat steps (3) and (4) until the top of the sleeve pile is stable at the preset elevation under the preset pressure.

2. The pile driving method for segmented piles according to claim 1, characterized in that, When the mounting groove is located on the inner wall of the outer sleeve, the recess is located on the outer wall of the inner sleeve, the top surface of the recess is inclined, and the bottom surface of the recess is horizontal; when the mounting groove is located on the outer wall of the inner sleeve, the recess is located on the inner wall of the outer sleeve, the top surface of the recess is horizontal, and the bottom surface of the recess is inclined.

3. The pile driving method for segmented piles according to claim 1, characterized in that, The sleeve pile also includes a limiting component, which is connected between two adjacent sleeve sections to limit the highest lifting position of the outer sleeve relative to the inner sleeve.

4. The pile driving method for segmented piles according to claim 3, characterized in that, The limiting component includes: A slide rail is provided on the inner wall of the outer sleeve and extends along the axial direction of the outer sleeve; A slider is disposed on the outer wall of the inner sleeve and near the top edge of the inner sleeve, and the slider is slidably connected to the slide rail; A stop block is disposed within the slide rail and located at the lower part of the outer sleeve, the stop block being located below the slider; When the outer sleeve is raised to its highest position relative to the inner sleeve, the slider abuts against the stop.

5. The pile driving method for segmented piles according to claim 1, characterized in that, The driving component includes: A baffle plate, which is connected to the outer periphery of the locking pin; A spring, which is connected between the inner wall of the outer sleeve and the baffle; When the outer sleeve has not reached the highest lifting position, the spring is compressed so that the inner end of the locking pin abuts against the outer wall of the inner sleeve; when the outer sleeve is raised to the highest lifting position relative to the inner sleeve, the spring returns to its length so that the inner end of the locking pin is inserted into the pin hole.

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