Multifunctional vibration pile for soft rock high fill and construction method of multifunctional vibration pile

Abstract

The invention discloses a multifunctional vibration pile for soft rock high fill and a construction method thereof, and belongs to the technical field of geotechnical engineering.The multifunctional vibration pile comprises a vibration pile body, a vibration excitation assembly and a control assembly, the vibration pile body comprises a pile body and a pile tip located at the lower end of the pile body, the pile body is detachably connected with the pile tip, and the pile tip is of a conical structure and used for penetrating through a fill body; the vibration excitation assembly is installed on the vibration pile body through a connecting structure, the vibration excitation assembly comprises a vibration exciter and a vibration reduction structure arranged between the vibration exciter and the connecting structure, and the vibration exciter can drive the vibration pile body to generate vibration; the control assembly is in signal connection with the vibration exciter and used for controlling the vibration exciter to operate and adjusting vibration parameters of the vibration exciter. According to the construction method, the multifunctional vibration pile is adopted, the deep-layer vibration compaction function and the lateral anti-sliding supporting function are integrated, and the effect of synchronously reinforcing and compacting a deep-layer filling body in the pile forming process is achieved.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering technology, and in particular to a multifunctional vibratory pile for high fill in soft rock and its construction method. Background Technology

[0002] High fill projects using soft rock are a common type of engineering in infrastructure construction projects such as road construction and site leveling. High fill refers to large-scale, high-depth filling operations using soft rock materials at specific engineering sites. Soft rock typically refers to rocks with low strength, low hardness, easy softening upon contact with water, and poor mechanical properties. Due to these inherent characteristics, soft rock embankments are characterized by high porosity, uneven particle size distribution, and low shear strength. In high fill operations, these soft rock embankments are extensively piled up to form a high fill height, thus meeting the project's requirements for site elevation and load-bearing foundations. However, these very characteristics of soft rock embankments make the fill prone to a series of problems during subsequent use, such as slippage (where parts of the fill may slide relative to a sliding surface) and excessive settlement, which can lead to uneven settlement of the superstructure and affect the normal use of the engineering facilities.

[0003] In traditional methods, anti-slide piles are a common approach. Their main function is to provide lateral anti-slide support for the fill, preventing lateral sliding of the fill through the interaction between the pile and the surrounding soil. However, anti-slide piles only provide lateral support and have limited effect on improving the compaction of the fill itself, leaving the fill with persistent problems such as high porosity.

[0004] In addition, vibration compaction technology is also a method for handling high fills in soft rock, usually using surface vibration equipment. However, due to the limited energy transmission depth, the vibration energy generated by surface vibration equipment is difficult to effectively transmit to the interior of the fill body. It can only play a certain compaction role in the area near the surface of the fill body, and cannot fundamentally solve the compaction problem inside the fill body. Summary of the Invention

[0005] The purpose of this invention is to provide a multifunctional vibratory pile and its construction method for high fill in soft rock, so as to solve the technical problems in the existing technology that anti-slide piles can only provide support but cannot achieve a compaction effect in the process of high fill in soft rock; conventional compaction methods can only compact the surface of the fill body, and the vibration energy cannot reach the interior of the fill body.

[0006] To achieve this objective, the present invention adopts the following technical solution: On one hand, the present invention provides a multifunctional vibratory pile for high fill in soft rock, comprising: A vibratory pile includes a pile body and a pile tip located at the lower end of the pile body. The pile body and the pile tip are detachably connected. The pile tip has a conical structure and is used to penetrate the fill material. A vibration excitation assembly is installed on the vibrating pile body via a connecting structure. The vibration excitation assembly includes a vibrator and a vibration damping structure disposed between the vibrator and the connecting structure. The vibrator can drive the vibrating pile body to vibrate. A control component, connected to the exciter via a signal, is used to control the operation of the exciter and adjust the vibration parameters of the exciter.

[0007] Preferably, the vibratory pile also includes a steel reinforcement cage, wherein the vibratory pile body is a hollow structure and the pile tip is provided with a connecting part, and the steel reinforcement cage can be inserted into the pile body from the top of the pile body and connected to the connecting part in the pile tip.

[0008] Preferably, the pile tip is made of high-grade concrete.

[0009] Preferably, the pile body is a segmented structure, and the pile body includes at least two pile sections along its own axial direction. The adjacent pile sections are interlocked and connected, and vibration transmission pads are provided between the adjacent pile sections.

[0010] Preferably, the connection structure is a flange, and the lower surface of the flange is fixedly connected to the top of the pile body.

[0011] Preferably, the vibration damping structure includes a damping sleeve, a damping pad, and a plurality of damping springs evenly arranged circumferentially along the flange. The damping sleeve is fitted onto the outer periphery of the vibrator, and a damping pad is provided between the damping sleeve and the vibrator. The upper end of the damping spring is connected to the bottom of the damping sleeve, and the lower end of the damping spring is connected to the upper surface of the flange. Preferably, the lower surface of the flange is provided with a first serrated ring, and the top end of the vibrating pile is provided with a corresponding second serrated ring. The first serrated ring and the second serrated ring mesh to form an anti-torsional interlocking structure.

[0012] Preferably, a vibration collar is coaxially sleeved on the outer periphery of the pile body, and a buffer washer is provided between the vibration collar and the pile body; When the pile body is excited and generates vertical vibration, the vibration collar will generate relative axial displacement with the pile body due to inertial lag, generating additional vertical vibration pressure on the top of the fill body.

[0013] Preferably, the vibratory pile body has a hollow structure inside, and a pendulum structure is provided inside the vibratory pile body; the pendulum structure includes a transmission rod and an inertial ball, the upper end of the transmission rod extends through the top of the vibratory pile body and is connected to the excitation assembly, and the lower end of the transmission rod extends into the interior of the pile tip and is connected to the inertial ball.

[0014] On the other hand, the present invention also provides a multifunctional vibratory pile construction method for high fill in soft rock, the method employing the above-mentioned multifunctional vibratory pile for high fill in soft rock, comprising: The vibratory pile is driven into the fill material to a preset depth; The vibrator is activated by the control component, which drives the vibrating pile to vibrate, thereby compacting the fill material around the vibrating pile. The vibrating pile forms a pile hole in the fill material. After the fill material has been vibrated and compacted, the vibration excitation assembly is removed, and the connection between the pile body and the pile tip is disconnected. The grouting pipe is inserted into the pile body, grout is injected into the pile body and the pile body is simultaneously pulled upwards until the pile body is completely pulled out of the pile hole; the pile tip and the grout together form a cast-in-place pile body in the pile hole.

[0015] The beneficial effects of this invention are: This invention proposes a multifunctional vibratory pile for high-fill sections of soft rock. The vibratory pile not only possesses the support form of a traditional anti-slide pile, but its conical tip at the lower end facilitates penetration of the fill material during construction, allowing the vibratory pile to reach deeper layers within the fill requiring treatment. An integrated excitation component on the vibratory pile generates and applies controllable vibration under the regulation of a control component. This vibration is directly transmitted through the pile to the surrounding fill material, effectively acting on the interior of the fill. This vibratory energy, within a certain range around the vibratory pile, compacts the loose, highly porosity soft rock material, improving the density and mechanical properties of the fill. Specifically, a vibration damping structure between the exciter and the connecting structure effectively isolates and dissipates some of the upward-transmitted vibration energy, protecting the reliability of the upper equipment and connecting structure, and ensuring that the vibration energy primarily diffuses downwards and outwards into the surrounding fill material. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a multifunctional vibratory pile for high fill in soft rock provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the multifunctional vibratory pile for high fill in soft rock provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the multifunctional vibratory pile for soft rock high fill provided in Embodiment 1 of the present invention being driven into the fill body; Figure 4 This is a partial structural schematic diagram of a multifunctional vibratory pile for high fill in soft rock provided in Embodiment 1 of the present invention; Figure 5 This is a front view of the multifunctional vibratory pile for high fill in soft rock provided in Embodiment 1 of the present invention; Figure 6 This is a flowchart of a multifunctional vibratory pile construction method for high fill in soft rock, provided in Embodiment 2 of the present invention.

[0017] In the picture: 100. Filler cube; 1. Vibratory pile body; 11. Pile body; 12. Pile tip; 13. Pile section; 14. Vibration transmission pad; 2. Vibration excitation assembly; 21. Vibrator; 22. Vibration damping structure; 221. Vibration damping sleeve; 222. Vibration damping pad; 223. Vibration damping spring; 3. Connection structure; 31. Flange; 4. Vibration collar; 41. Buffer washer; 5. Pendulum structure; 51. Transmission rod; 52. Inertia ball. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 See Figures 1 to 5The multifunctional vibratory pile for high fill in soft rock provided in this embodiment of the invention includes a vibratory pile body 1, an excitation assembly 2, and a control assembly. The vibratory pile body 1 includes a pile shaft 11 and a pile tip 12 located at the lower end of the pile shaft 11. The pile tip 12 has a conical structure for penetrating the fill material 100. The excitation assembly 2 is installed on the vibratory pile body 1 via a connecting structure 3. The excitation assembly 2 includes a vibrator 21 and a damping structure 22 disposed between the vibrator 21 and the connecting structure 3. The vibrator 21 can drive the vibratory pile body 1 to vibrate. The control assembly is signal-connected to the vibrator 21 and is used to control the operation of the vibrator 21 and adjust the vibration parameters of the vibrator 21.

[0023] The present invention proposes a multifunctional vibratory pile for high-fill areas in soft rock. The vibratory pile body 1 not only possesses the support form of a traditional anti-slide pile, but its conical pile tip 12 at the lower end of the pile body 11 facilitates penetration of the fill body 100 during construction, allowing the vibratory pile body 1 to reach the deeper layers within the fill body 100 that require treatment. The excitation component 2 integrated on the vibratory pile body 1 can generate and apply controllable vibration under the regulation of the control component. The vibration is directly transmitted through the pile body 11 to the fill body 100 surrounding the vibratory pile body 1. The vibration energy can effectively act within the fill body 100, thereby producing a vibrational compaction effect on the loose, highly porosity soft rock material within a certain range around the vibratory pile body 1, improving the density and mechanical properties of the fill body 100. In particular, the vibration damping structure 22 set between the exciter 21 and the connecting structure 3 can effectively isolate and dissipate some of the upward-transmitted vibration energy, protecting the reliability of the upper equipment and the connecting structure 3, and ensuring that the vibration energy mainly diffuses downwards and to the surrounding fill body 100.

[0024] The working principle and specific structure of this multifunctional vibratory pile will be explained in detail below.

[0025] The vibratory pile 1 is a structural component directly implanted into the fill 100, undertaking core functions. In a preferred embodiment, the pile body 11 is made of high-strength alloy steel to ensure that it has sufficient strength and rigidity to withstand the impact during pile driving, long-term support loads, and internal vibration excitation. The diameter of the pile body 11 is typically between 300 mm and 600 mm, thus balancing structural strength and economy; the length of the pile body 11 is set according to the actual fill height in the project, generally between 3 meters and 10 meters, to ensure that the vibratory pile 1 can penetrate the soft surface layer of the fill 100 to be treated and reach the reinforcement area at the designed depth.

[0026] Considering the convenience of transportation and the flexibility to adapt to different construction methods, the pile body 11 can adopt a segmented structure. In this embodiment, the pile body 11 along its own axis includes at least two pile segments 13, which are interlocked and connected to each other, thereby ensuring reliable mechanical transmission between the pile segments 13.

[0027] Furthermore, vibration transmission pads 14 are provided between adjacent pile sections 13. The vibration transmission pads 14 are made of highly elastic and highly wear-resistant rubber or composite materials. The vibration transmission pads 14 are used to buffer and adjust stress concentration at the connection. In addition, the vibration transmission pads 14 can also ensure that vibration energy can be efficiently transferred from one pile section 13 to the next pile section 13 through the connection interface, reduce the loss of vibration energy at the connection, and ensure the consistency of vibration effect throughout the entire pile body 11.

[0028] The pile tip 12 is located at the lower end of the pile body 11. The pile tip 12 is made of high-grade concrete pile head to ensure that the pile body 11 can penetrate the interior of the fill body 100.

[0029] To further enhance the compaction effect on the fill material 100 near the pile tip 12, the vibratory pile 1 has a hollow internal structure and a pendulum structure 5 is installed inside. The pendulum structure 5 includes a transmission rod 51 and an inertial ball 52. The upper end of the transmission rod 51 extends through the top of the vibratory pile 1 and is connected to the excitation assembly 2, while the lower end of the transmission rod 51 extends into the interior of the pile tip 12 and is connected to the inertial ball 52. The inertial ball 52 is typically made of high-density material to provide sufficient mass. By setting the pendulum structure 5, an independent power transmission path is formed from the excitation assembly 2 directly to the interior of the pile tip 12.

[0030] Its working principle is as follows: When the excitation assembly 2 is running, the vibration generated by the exciter 21 is transmitted not only through the physical connection between the flange 31 and the pile body 11, but also directly and efficiently transmitted to the inertial ball 52 located inside the pile tip 12 through the transmission rod 51. Since the transmission rod 51 is a rigid connecting part, the energy loss of the longitudinal vibration wave transmitted by the transmission rod 51 is much less than the energy dissipation during the transmission through the long solid material of the pile body 11. After receiving the vibration from the transmission rod 51, the inertial ball 52, due to the inertial effect generated by its own mass, will further amplify and maintain the vibration amplitude and transmit it to the pile tip 12. This effectively avoids the serious attenuation problem caused by material damping, joint loss and soil resistance of the backfill 100 during the transmission of vibration energy from the top of the pile body 11 to the pile tip 12, thereby improving the vibration intensity and stability of the pile tip 12 and ensuring that the pile tip 12 has continuous and strong energy during vibration.

[0031] Preferably, the vibratory pile further includes a reinforcing steel cage. The vibratory pile body 1 has a hollow structure, and a butt joint is provided inside the pile tip 12. The reinforcing steel cage can be inserted into the pile body 11 from the top and connected to the butt joint inside the pile tip 12. The butt joint can be a sleeve, a socket, or other form of mechanical connection interface. The reinforcing steel cage is designed to be inserted into the hollow pile body 11 from the top opening and descend under gravity guidance or assistance, ultimately achieving a stable connection between the lower end of the reinforcing steel cage and the butt joint provided inside the pile tip 12.

[0032] After the vibratory pile 1 completes the compaction of the fill 100, it forms a pile hole within the fill 100. The pile body 11 can then be removed separately, leaving the pile tip 12 and the reinforcing steel cage inside the pile hole. Finally, concrete or high-strength grout is poured into the pile hole to form a permanently cast-in-place reinforced concrete pile that is tightly bonded to the surrounding compacted fill 100. The reinforcing steel cage enhances the pile's bending, shear, and overall bearing capacity, making it particularly suitable for major engineering projects requiring high resistance to slippage and deformation.

[0033] The excitation assembly 2 is installed on top of the vibratory pile 1 via the connecting structure 3. The connecting structure 3 is a flange 31, and the lower surface of the flange 31 is fixedly connected to the top of the pile body 11 of the vibratory pile 1 via high bolts. The vibration damping structure 22 is used to ensure efficient downward transmission of vibration energy while protecting the upper equipment and structure from damage.

[0034] The vibration damping structure 22 includes a damping sleeve 221, a damping pad 222, and multiple damping springs 223 evenly arranged circumferentially along the flange 31. The damping sleeve 221 is fitted onto the outer periphery of the exciter 21's housing. A damping pad 222 is pressed between the inner surface of the damping sleeve 221 and the exciter 21's housing. The damping pad 222 is typically made of high-damping rubber or composite materials, and its function is to absorb and isolate the high-frequency vibrations generated by the exciter 21, reducing the vibration energy directly transmitted to the external support structure. Simultaneously, the upper end of the damping spring 223 is connected to the bottom of the damping sleeve 221, and the lower end of the damping spring 223 is connected to the upper surface of the flange 31. Multiple damping springs 223 are evenly distributed circumferentially, collectively forming the main elastic support and force transmission path.

[0035] The vibration force generated by the vibrator 21 during operation is first partially absorbed and filtered by the damping pad 222. Subsequently, the remaining main vibration energy is transmitted to multiple damping springs 223 through the damping sleeve 221. While bearing axial pressure, the damping springs 223 undergo elastic deformation, buffering the vibration energy and converting it into the reciprocating deformation energy of the spring. This allows the controllable, filtered vibration force to be transmitted to the flange 31 below, effectively suppressing vibration components that are harmful to the flange 31 and the upper support equipment, while ensuring that the core vibration energy is efficiently and smoothly transmitted downward to the pile body 11. This achieves dynamic decoupling and controllable coupling between the vibrator 21 and the working parts.

[0036] To further enhance the reliability of the connection structure 3 under strong vibration conditions, especially to prevent harmful relative circumferential rotation between the vibrator 21 and the pile body, a first serrated ring is provided on the lower surface of the flange 31, and a second serrated ring is provided at the top of the vibrating pile body 1. When the flange 31 is fixedly connected to the top of the pile body 11, the first and second serrated rings mesh with each other to form an anti-torsion interlocking structure, which can effectively resist the torsional torque generated by the vibrator 21 and prevent the connection from loosening due to long-term torsional vibration.

[0037] In a preferred embodiment, a vibration collar 4 is coaxially sleeved on the outer periphery of the pile body 11. A buffer washer 41 is provided between the vibration collar 4 and the pile body 11; the buffer washer 41 is typically made of highly elastic and highly wear-resistant rubber material, and the buffer washer 41 tightly fills the annular gap between the vibration collar 4 and the pile body 11. Due to long-term and severe vibration impact, the pile body 11 and the vibration collar 4 may experience rigid collisions and wear. The elastic buffering effect of the buffer washer 41 absorbs the impact energy between the contact interface of the pile body 11 and the vibration collar 4, protecting the relevant components.

[0038] In the assembled state, the upper end of the vibratory collar 4 abuts against the bottom of the flange 31, and the lower end of the vibratory collar 4 can abut against the top of the fill body 100 after the vibratory pile body 1 is penetrated.

[0039] When the pile body 11 is excited and generates vertical vibration, the vibration collar 4 will generate relative axial displacement with the pile body 11 due to inertial lag, which will generate additional vertical vibration pressure on the top of the fill body 100.

[0040] Its core working principle is as follows: When the pile body 11 is driven by the upper vibrator 21 to generate strong vertical vibration, since the vibrating collar 4 is non-rigidly connected to the pile body 11 through the buffer washer 41, and the vibrating collar 4 itself has a certain mass, under the action of inertia, the motion response of the vibrating collar 4 will lag behind the rapid reciprocating motion of the pile body 11. This motion lag causes a continuous relative axial displacement between the vibrating collar 4 and the pile body 11. Since the lower end of the vibrating collar 4 always abuts against the top of the fill body 100, this relative displacement causes the vibrating collar 4 to periodically apply additional vertical vibration pressure to the surface of the fill body 100 with a certain kinetic energy, thereby not only further compacting the loose surface material of the fill body 100 near the pile, but also reducing surface settlement.

[0041] The vibrator 21 is the power source that drives the entire vibrating pile 1 to generate the required mechanical vibration. In this embodiment, the vibrator 21 is specifically an adjustable frequency and amplitude electric vibration generator. The core of the vibrator 21 includes a drive motor, an inertial block, and a sealed housing. The drive motor is usually a variable frequency speed control motor, and its output shaft is directly connected to the inertial block or through a transmission mechanism. By changing the speed of the motor, the frequency of the centrifugal force generated by the rotation of the inertial block can be adjusted; by adjusting the eccentricity or mass distribution of the inertial block mechanically or electronically, the magnitude of the excitation force can be changed. The base of the vibrator 21 is provided with a standard mounting interface for assembly with the connecting structure 3 and the vibration damping structure 22.

[0042] The vibrator 21 is connected to the control component via a cable. The control component can send commands to the vibrator 21 to start and stop it, and precisely adjust its vibration parameters, such as vibration frequency and amplitude, so that the construction process can be optimized for different compaction requirements, different depths of fill 100, or varying geological conditions. For example, a higher frequency and medium amplitude vibration mode can be used in the initial penetration stage; while when performing main vibration compaction at a specific depth, it can be adjusted to the optimal compaction frequency and large amplitude output mode.

[0043] Understandably, the control components also include a controller and a battery. The battery, as an independent power supply unit, provides stable and reliable power to all electrical components, including the vibrator 21 and the controller itself, ensuring that the entire system can continue to operate independently even in environments where a fixed power source may be lacking at the construction site.

[0044] The controller establishes an electrical connection with all the aforementioned electrical components via cables or wireless communication. As the logic processing and command center, the controller's functions include, but are not limited to, sending start / stop, frequency modulation, and amplitude modulation control signals to the exciter 21 according to preset program logic or operator instructions.

[0045] In this embodiment, the controller can be a programmable logic controller, an industrial computer, or a dedicated embedded control unit. This falls within the scope of conventional selection by those skilled in the art based on specific functional and reliability requirements. The internal circuitry, programming language, and specific operational principles of the selected controller are not the core contribution of this invention to the prior art and will not be elaborated upon here.

[0046] Example 2 See Figure 6 This invention also provides a method for constructing multifunctional vibratory piles for high fill in soft rock. This method uses the multifunctional vibratory piles provided in Embodiment 1, and the specific operation steps of this method are as follows: S1: Drive the vibratory pile 1 into the fill body 100 to the preset depth.

[0047] In this step, firstly, according to the designed length of the vibratory pile 1, multiple segmented pile sections 13 are sequentially connected and assembled with vibration transmission pads 14, and the pile tip 12 is installed at the lower end of the pile body 11. The multi-functional vibratory pile is then clamped and driven using a pile driver. Under pressure and accompanying rotation, the pile tip 12 squeezes and breaks up the soft rock fill material. The operator can precisely control the penetration trajectory and the final pile top elevation, ensuring that the vibratory pile 1 reaches the preset design depth and position.

[0048] S2: The vibrator 21 is started by controlling the control component, which drives the vibrating pile 1 to vibrate, so as to vibrate and compact the fill 100 around the vibrating pile 1, and the vibrating pile 1 forms a pile hole in the fill 100.

[0049] Once the vibratory pile 1 is in place, the vibrator 21 located at the pile top is activated via the control components, and the vibration mechanism inside the pile tip 12 can be activated synchronously or in stages as needed. A portion of the vibration is buffered and filtered by the vibration damping structure 22 before being transmitted to the pile body 11 via the flange 31. The first and second serrated rings meshing between the flange 31 and the pile top ensure that the flange 31 and the pile top form an anti-torsional interlocking structure. The vibration of the pile body 11 directly acts on the surrounding fill 100, generating radial compression and vibration waves, causing the loose, high-porosity soft rock fill to rearrange and become denser.

[0050] Another part of the vibration is transmitted to the inertial ball 52 inside the pile tip 12 through the transmission rod 51 of the pendulum structure 5. The inertial effect of the inertial ball 52 amplifies and maintains the vibration intensity at the pile tip 12, thereby improving the compaction effect of the fill 100 near the pile tip 12.

[0051] At the same time, the vibration collar 4, which is fitted around the pile body 11, generates relative displacement with the vibrating pile body 11 under the action of inertia, and periodically applies additional vertical vibration pressure to the top of the fill body 100, further compacting the surface soil.

[0052] During this process, the vibration parameters of the vibrator 21 can be adjusted by the control components according to the compaction requirements of different depths of the fill body 100 or the changes in soil resistance. At the same time, the vibrating pile body 1 itself forms a pile hole in the fill body 100.

[0053] S3: After the compaction of the fill block 100 is completed by vibration, remove the excitation component 2 and disconnect the connection between the pile body 11 and the pile tip 12.

[0054] Once the vibration compaction reaches the design requirements or the predetermined time, the vibrator 21 is stopped by the control component. After confirming that the compaction of the fill body 100 is completed, the upper structure is dismantled first. The high-strength bolts of the flange 31 are loosened, and the vibrator 21, vibration damping structure 22, connecting structure 3, and pendulum structure 5 of the vibration assembly 2 are removed from the pile body 11.

[0055] Subsequently, the vibratory pile 1 is separated from itself. The connection between the pile body 11 and the pile tip 12 is released using a special tool or operating device.

[0056] After disconnection, the reinforcing steel cage can be inserted into the hollow interior of the pile body 11 through the opening at the top of the pile body 11, according to the design requirements of permanent support. The reinforcing steel cage sinks under the action of gravity, and the lower end of the reinforcing steel cage is firmly connected to the pre-set docking part inside the pile tip 12, providing a skeleton for the subsequent formation of the cast-in-place pile body.

[0057] S4: Insert the grouting pipe into the pile body 11, inject grout into the pile body 11 and simultaneously pull the pile body 11 upward until the pile body 11 is completely pulled out of the pile hole; the pile tip 12 and the grout together form the grouted pile body in the pile hole.

[0058] First, the grouting pipe is inserted into the pile body 11, with the lower end of the grouting pipe close to the upper end of the pile tip 12.

[0059] Then, the grouting pump is started to inject grout into the pile body 11. The grout is usually cement grout or high-strength composite grout, and the grouting pressure needs to be controlled according to the design requirements.

[0060] Simultaneously with the start of grouting, the pile extraction equipment is activated, and the pile body 11 is pulled upwards. The pulling speed is matched with the grouting volume to ensure that the cavity at the bottom of the pile body 11 is continuously filled with grout during the upward extraction process, preventing necking or pile breakage within the pile hole, until the pile body 11 is completely extracted from the pile hole. The pile body 11 is then completely recovered and can be reused.

[0061] Ultimately, the pile tip 12 remaining at the bottom of the pile hole, together with the grout filling the entire pile hole and the reinforcing steel skeleton within it, solidifies and forms a cast-in-place pile body that runs from the bottom to the top of the hole and is tightly integrated with the surrounding vibrated fill 100. This cast-in-place pile body inherits the dense pile hole boundary formed by the vibratory pile, possesses excellent bearing capacity and anti-slip ability, and becomes a permanent structure in high fill engineering projects.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A multifunctional vibratory pile for high fill in soft rock, characterized in that, include: The vibratory pile (1) includes a pile body (11) and a pile tip (12) located at the lower end of the pile body (11). The pile body (11) and the pile tip (12) are detachably connected. The pile tip (12) is a conical structure used to penetrate the fill body (100). The excitation assembly (2) is installed on the vibrating pile body (1) through the connecting structure (3). The excitation assembly (2) includes an exciter (21) and a damping structure (22) disposed between the exciter (21) and the connecting structure (3). The exciter (21) can drive the vibrating pile body (1) to vibrate. The control component is connected to the exciter (21) by signal and is used to control the operation of the exciter (21) and adjust the vibration parameters of the exciter (21).

2. The multifunctional vibratory pile for high fill in soft rock according to claim 1, characterized in that, It also includes a steel reinforcement cage. The vibratory pile body (1) is a hollow structure. The pile tip (12) is provided with a connecting part. The steel reinforcement cage can be inserted from the top of the pile body (11) into the pile body (11) and connected to the connecting part in the pile tip (12).

3. The multifunctional vibratory pile for high fill in soft rock according to claim 1, characterized in that, The pile tip (12) is made of high-grade concrete.

4. The multifunctional vibratory pile for high fill in soft rock according to claim 1, characterized in that, The pile body (11) is a segmented structure. The pile body (11) includes at least two pile sections (13) along its own axis. The adjacent pile sections (13) are interlocked and connected, and vibration transmission pads (14) are provided between the adjacent pile sections (13).

5. The multifunctional vibratory pile for high fill in soft rock according to claim 1, characterized in that, The connection structure (3) is a flange (31), and the lower plate of the flange (31) is fixedly connected to the top of the pile body (11).

6. The multifunctional vibratory pile for high fill in soft rock according to claim 5, characterized in that, The vibration damping structure (22) includes a vibration damping sleeve (221), a vibration damping pad (222), and a plurality of vibration damping springs (223) evenly arranged around the flange (31). The vibration damping sleeve (221) is sleeved on the outer periphery of the vibrator (21). The vibration damping pad (222) is provided between the vibration damping sleeve (221) and the vibrator (21). The upper end of the vibration damping spring (223) is connected to the bottom of the vibration damping sleeve (221), and the lower end of the vibration damping spring (223) is connected to the upper plate surface of the flange (31).

7. The multifunctional vibratory pile for high fill in soft rock according to claim 6, characterized in that, The lower surface of the flange (31) is provided with a first serrated ring, and the top end of the vibrating pile (1) is provided with a second serrated ring. The first serrated ring and the second serrated ring mesh to form an anti-torsion interlocking structure.

8. The multifunctional vibratory pile for high fill in soft rock according to claim 1, characterized in that, A vibration collar (4) is coaxially sleeved on the outer periphery of the pile body (11), and a buffer washer (41) is provided between the vibration collar (4) and the pile body (11). When the pile body (11) is excited and generates vertical vibration, the vibration collar (4) generates relative axial displacement with the pile body (11) due to inertial lag, generating additional vertical vibration pressure on the top of the fill body (100).

9. The multifunctional vibratory pile for high fill in soft rock according to claim 1, characterized in that, The vibrating pile body (1) has a hollow structure inside, and a pendulum structure (5) is provided inside the vibrating pile body (1); the pendulum structure (5) includes a transmission rod (51) and an inertial ball (52). The upper end of the transmission rod (51) extends through the top of the vibrating pile body (1) and is connected to the excitation assembly (2). The lower end of the transmission rod (51) extends into the interior of the pile tip (12) and is connected to the inertial ball (52).

10. A multifunctional vibratory pile construction method for high fill in soft rock, characterized in that, The multifunctional vibratory pile for high fill in soft rock as described in any one of claims 1-9 comprises: The vibratory pile (1) is driven into the fill body (100) to a preset depth; The vibrator (21) is started by controlling the control component, which drives the vibrating pile (1) to vibrate, so as to vibrate and compact the fill (100) around the vibrating pile (1), and the vibrating pile (1) forms a pile hole in the fill (100); After the fill body (100) has been vibrated and compacted, the excitation assembly (2) is removed, and the connection between the pile body (11) and the pile tip (12) is disconnected. The grouting pipe is inserted into the pile body (11), grout is injected into the pile body (11), and the pile body (11) is pulled upward at the same time until the pile body (11) is completely pulled out of the pile hole; the pile tip (12) and the grout together form a grouting pile body in the pile hole.

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