Stone column construction equipment

Abstract

The application provides a gravel pile construction equipment, and relates to the technical field of ocean engineering. The gravel pile construction equipment comprises: a vibration pipe used for being inserted into a soil body to form a pile hole corresponding to a gravel pile; a first excitation source arranged at the top of the gravel pile and used for providing a downward force to the vibration pipe; and a plurality of second excitation sources arranged at the bottom of the vibration pipe and used for resonating at the bottom of the vibration pipe to provide a lateral vibration force to the vibration pipe. The embodiment of the application can improve the excitation force at the bottom of the vibration pipe by arranging the second excitation sources at the bottom of the vibration pipe, improve the compaction effect of deep soil, and diffuse vibration energy to the periphery of the vibration pipe to improve the compaction effect on the soil body around the pile.

Description

Technical Field

[0001] This application relates to the field of crushed stone pile construction technology, and more specifically, to a crushed stone pile construction device. Background Technology

[0002] Crushed stone pile construction typically employs the vibratory pipe method (top-mounted vibration source). This method uses a vibratory hammer (installed on top of a steel pipe) to generate excitation force, which is transmitted to the pile end through the steel pipe. The steel pipe is driven down while vibrating to form a hole. After layered filling, the vibratory hammer compacts the filling material and the surrounding soil, and finally, the steel pipe is pulled out to form the crushed stone pile.

[0003] The advantages of the vibratory pipe method are: 1. No high-pressure water jet, minimal disturbance to the soil, no need for flushing, avoiding problems such as borehole wall collapse, increased soil moisture content, and softening of foundation soil in soft soil areas; 2. Uniform pile quality, steel pipe wall protection during borehole formation, strong controllability of pile diameter, and less prone to necking and pile breakage; 3. Wide applicability to soil types, can be constructed in cohesive soil, silt, sand, and fill soil strata, especially suitable for water-sensitive soft soil foundations.

[0004] The disadvantages are: 1. High vibration energy loss: During the process of the excitation force being transmitted from the top to the pile end, it is significantly attenuated by the steel pipe, resulting in poor compaction effect of deep soil; 2. Small compaction range: The excitation force is in the vertical direction, and the vibration energy is concentrated around the vibrating pipe, resulting in a weak compaction effect on the soil around the pile. Summary of the Invention

[0005] This application provides a crushed stone pile construction device that can solve the problems of significant vibration force attenuation, poor deep soil compaction effect, and small compaction range in existing vibratory pipe construction methods. To achieve this objective, this application provides the following solutions.

[0006] According to one aspect of the embodiments of this application, a crushed stone pile construction device is provided, comprising: Vibratory tubes are used to be inserted into the soil to form the pile holes corresponding to the crushed stone piles. The first excitation source is located at the top of the crushed stone pile and is used to provide a downward penetrating force to the vibrating tube. Multiple second excitation sources are provided at the bottom of the vibrating tube to resonate at the bottom of the vibrating tube and provide a lateral vibration force to the vibrating tube.

[0007] In one possible implementation, the vibrating tube includes multiple sub-tubes connected in sequence, with the first excitation source located on the topmost sub-tube and multiple second excitation sources located on the bottommost sub-tube.

[0008] In one possible implementation, the top of the top sub-pipe is provided with a feed hopper to prevent the stones from scattering, and the bottom of the bottom sub-pipe is provided with a discharge port.

[0009] In one possible implementation, the discharge port is provided with a hinged plate and a rotating shaft. The rotating shaft is fixed to the discharge port, and one side of the hinged plate is rotatably fixed to the rotating shaft. The hinged plate is used to seal the discharge port when the vibrating tube is lowered and to open the discharge port when the vibrating tube is lifted.

[0010] In one possible implementation, the second excitation source is fixed to the wall of the sub-tube, the sub-tube is provided with a cable conduit, and the second excitation source is connected to the cable in the cable conduit.

[0011] In one possible implementation, the contact side of the adjacent sub-pipe is provided with a pipe interface of the cable pipe, the pipe interface including a male port and a female port; A sealing gasket is provided on the side of the male and female openings that are in contact with each other.

[0012] In one possible implementation, the cable ends in different sub-tubes are provided with cable interfaces, and the sub-tubes are provided with a mating interface and a mating cover at the positions corresponding to the cable interfaces, with the mating cover being movably fixed to the mating interface.

[0013] In one possible implementation, a pile frame is provided with a sliding track, a top slider, and a traction rope. The top slider is slidably fixed to the sliding track and is connected to the traction rope and the first excitation source, respectively. The traction rope is used to drive the first excitation source and the top slider to slide along the sliding track.

[0014] In one possible implementation, the plurality of second excitation sources are spaced apart along the axial direction of the vibrating tube at the bottom of the vibrating tube, and each second excitation source has the same vibration frequency.

[0015] In one possible implementation, the initial phase and position of the second excitation source are calculated based on an excitation source calculation formula, which is:

[0016] In the formula, Let i be the initial phase of the i-th second excitation source. Let j be the initial phase of the second excitation source. Let be the propagation distance from the i-th second excitation source to the target point. Let be the propagation distance from the j-th second excitation source to the target point.

[0017] The beneficial effects of the technical solutions provided in this application are: The crushed stone pile construction equipment provided in this application includes: a vibratory tube for insertion into the soil to form a pile hole corresponding to the crushed stone pile; a first excitation source located at the top of the crushed stone pile for providing downward force to the vibratory tube; and multiple second excitation sources located at the bottom of the vibratory tube for resonance at the bottom of the vibratory tube to provide lateral vibration force to the vibratory tube. The embodiments of this application can improve the excitation force at the bottom of the vibratory tube by setting second excitation sources at the bottom of the vibratory tube, thereby improving the compaction effect of deep soil and diffusing vibration energy to the periphery of the vibratory tube, thus enhancing the compaction effect on the soil around the pile. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below.

[0019] Figure 1 A structural diagram of the crushed stone pile construction equipment provided in the embodiments of this application; Figure 2 A schematic diagram of the bottom structure of the vibrating tube provided in the embodiments of this application; Figure 3 This is a schematic diagram of the cable arrangement in the crushed stone pile construction equipment provided in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures: 11. Fixed pulley; 12. Traction rope; 13. Top slider; 14. Sliding track; 15. Pipe clamp; 2. First vibration source; 31. Feed hopper; 32. Vibrating tube; 33. Discharge port; 34. Flange; 35. Cable conduit; 351. Cable; 352. Cable interface; 353. Sealing gasket; 354. Female connector; 355. Male connector; 36. Rotating shaft; 37. Hinge plate; 38. Flange; 39. Connecting cover; 4. Second vibration source; 5. Stone. Detailed Implementation

[0021] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0022] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the terms “comprising” and “including” as used in embodiments of this application mean that the corresponding feature can be implemented as the presented feature, information, data, step, operation, element, and / or component, but do not exclude implementation as other features, information, data, step, operation, element, component, and / or combinations thereof supported by the art. It should be understood that when we say that an element is “connected” or “coupled” to another element, the one element can be directly connected or coupled to the other element, or it can mean that the one element and the other element establish a connection relationship through an intermediate element. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein indicates at least one of the items defined by the term; for example, “A and / or B” indicates implementation as “A,” or implementation as “A,” or implementation as “A and B.”

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0024] The technical solutions of this application and their effects are described below through several exemplary embodiments. It should be noted that the following embodiments can be referenced, borrowed from, or combined with each other. Identical terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0025] The crushed stone pile construction equipment provided in this application is intended to solve at least one technical problem existing in the prior art.

[0026] Optionally, such as Figures 1-3 As shown, the crushed stone pile construction equipment of this application includes: a vibratory tube 32, used to insert into the soil to form a pile hole corresponding to the crushed stone pile; a first excitation source 2, which is located at the top of the crushed stone pile and is used to provide downward force to the vibratory tube 32; and multiple second excitation sources 4, which are located at the bottom of the vibratory tube 32 and are used to resonate at the bottom of the vibratory tube 32 to provide lateral vibration force to the vibratory tube 32. The first excitation provides the power for the vibratory tube 32 to move up and down, and the second excitation sources 4 are used to provide horizontal vibration force to make the stones and soil compact. At the same time, since the pile is very deep, there is energy loss in the downward transmission of the vibration at the top, and the vibration at the bottom is smaller. The combined lateral and vertical vibration ensures sufficient power during the downward penetration process. Furthermore, by resonating multiple second excitation sources 4, a higher excitation force is obtained, and the volume of the second excitation sources 4 is effectively reduced.

[0027] Optionally, to prevent the vibratory tube 32 from tipping over and to ensure that the vibratory compactor provides a vertically penetrating excitation force, the stone pile construction equipment includes a pile frame equipped with a sliding rail 14, a top slider 13, and a traction rope 12. The top slider 13 is slidably fixed to the sliding rail 14 and connected to the traction rope 12 and the first excitation source 2, respectively. The traction rope 12 is used to drive the first excitation source 2 and the top slider 13 to slide along the sliding rail 14. The sliding rail 14 is vertically arranged, and the top slider 13 moves vertically up and down along the sliding rail 14. The vibratory tube 32 can be movably fixed to one side of the pile frame where the sliding rail 14 is located.

[0028] Optionally, the traction rope 12 can be a steel cable, the first excitation source 2 can be a large excitation source (can be a vibratory shock device), which provides downward force to the vibratory tube 32, and the top slider 13 can form an integral structure with the first excitation source 2, which moves up and down along the sliding track 14.

[0029] Optionally, the crushed stone pile construction equipment may also include a control motor, which may be installed on the ground and connected to one end of the traction rope 12. The control motor pulls the top slider 13 and the first excitation source 2 up and down through the traction rope 12. The top of the sliding track 14 may also be equipped with a fixed pulley 11, on which the traction rope 12 is fitted.

[0030] Optionally, the pile frame may include a truss, with the sliding rail 14 vertically fixed to the truss. To further fix the pile frame, a diagonal brace may be provided on one side of the truss, with one end fixed to the ground and the other end abutting against or connected to the truss. The truss and diagonal brace form a triangular structure, thereby improving the stability of the truss.

[0031] Optionally, to avoid the need for excessively tall pile frames, the vibratory pipe 32 can include multiple sub-pipes connected sequentially. The first excitation source 2 is located on the topmost sub-pipe, and multiple second excitation sources 4 are located on the bottommost sub-pipe. During the crushed stone pile formation process, a portion of the sub-pipes can be used to form the current vibratory pipe 32. After most of the vibratory pipe 32 has penetrated the ground, new sub-pipes are added to the top of the vibratory pipe 32 according to the required depth of the crushed stone pile, thereby continuously increasing the length of the vibratory pipe 32. This multi-layered connection method avoids the safety hazards of excessively tall pile frames, thus enabling the construction of ultra-deep crushed stone piles.

[0032] Optionally, adjacent sub-tubes in the vibrating tube 32 can be connected by flange 34 or by welding. The connection method between sub-tubes can be determined according to actual needs.

[0033] In one embodiment, to adapt to the construction requirements of crushed stone piles at different depths, the length of the sub-pipe can be multiple sizes such as 5m, 10m, and 15m, and the corresponding length of the sub-pipe can be selected as needed according to the actual construction depth on site.

[0034] Optionally, to ensure the vibratory tube 32 is lowered vertically, a pipe clamp 15 can be provided at the bottom of the pile frame. One end of the pipe clamp 15 is fixed to the bottom of the truss, and an opening can be provided at the position opposite to the vibratory tube 32, through which the vibratory tube 32 is inserted into the soil. To facilitate the placement and removal of the vibratory tube 32, the pipe clamp 15 can be an openable / closable structure. When initially placing the vibratory tube 32, the openable / closable structure can be opened to insert the vibratory tube 32 into the pipe clamp 15.

[0035] In one embodiment, the top of the uppermost sub-tube is provided with a feed hopper 31 to prevent the stones 5 from scattering, and the bottom of the lowermost sub-tube is provided with a discharge port 33. The diameter of the feed hopper 31 is larger than the inner diameter of the vibrating tube 32, and the feed hopper 31 prevents the stones 5 from scattering when they are being loaded into the vibrating tube 32. The stones 5 loaded into the vibrating tube 32 are then filled into the soil through the bottommost sub-tube.

[0036] Optionally, the second vibration source 4 can be a small vibration source. A small vibration source can avoid the problem of large vibration sources occupying the pipe space and making it impossible to use large stones 5. Lateral vibration can also prevent large stones 5 from blocking the pipe opening and preventing material from being discharged. At the same time, it can also provide vibration force to the bottom of the pipe and compact the soil around the pile.

[0037] Optionally, the discharge port 33 is provided with a hinge plate 37 and a rotating shaft 36. The rotating shaft 36 is fixed to the discharge port 33, and the hinge plate 37 is rotatably fixed to the rotating shaft 36 on one side. The hinge plate 37 is used to seal the discharge port 33 when the vibrating tube 32 is lowered and to open the discharge port 33 when the vibrating tube 32 is lifted.

[0038] Optionally, the rotating shaft 36 can be welded inside the bottom sub-tube, and the hinge plate 37 connected to the rotating shaft 36 can close or open the discharge port 33. During the lowering of the vibrating tube 32, the hinge plate 37 will seal the discharge port 33 due to the obstruction of the soil, preventing the in-situ soil layer from being pressed into the vibrating tube 32. During the lifting stage, since there is no soil obstruction, the hinge plate 37 opens under the gravity of the stone 5, thereby placing the stone 5 into the soil layer to form a crushed stone pile.

[0039] Optionally, the diameter of the discharge port 33 can be larger than the pipe diameter of the vibrating tube 32, wherein the diameter difference between the two can be 5cm, 10cm, or other length differences. Specifically, a flared opening 38 can be formed in the discharge port 33 by reaming. The diameter of the flared opening 38 is larger than the diameter of other areas of the sub-tube. After drilling in the lower penetration stage, since the diameter of the flared opening 38 is larger than the diameter of the main pipe, in dense strata, the soil does not contact the pipe outside the flared opening 38 in the vibrating tube 32. In non-dense strata, the pipe outside the flared opening 38 is in contact with the collapsed soil layer. The soil pressure it experiences is significantly reduced compared to traditional pipes of the same diameter, thereby reducing the side friction resistance between the vibrating tube 32 and the soil layer, improving construction efficiency, and reducing equipment wear.

[0040] Optionally, the second excitation source 4 is fixed to the wall of the sub-tube, and a cable conduit 35 is provided inside the sub-tube. The second excitation source 4 is connected to the cable 351 inside the cable conduit 35. The second excitation source 4 can be fixed to the wall of the vibrating tube 32 by welding. A power transmission line can be provided inside the cable conduit 35 to supply power to the second excitation source 4. A control line can also be provided inside the cable conduit 35, which is connected to the second excitation source 4 to transmit information such as the operating parameters and operating status of the second excitation source 4, and to send control commands to the second excitation source 4.

[0041] Optionally, to facilitate rapid connection of cable conduits 35 between different sub-conduits, the contact side of adjacent sub-conduits is provided with a cable conduit 35 interface, including a male connector 355 and a female connector 354; a sealing gasket 353 is provided on the side where the male connector 355 and the female connector 354 contact each other, thereby improving installation efficiency through the rapid insertion of the male connector 355 and the female connector 354. The male connector 355 of the cable conduit 35 is smaller than the female connector 354; during installation, the male connector 355 of the cable conduit 35 is inserted into the female connector 354 of the cable conduit 35.

[0042] Optionally, the sealing gasket 353 can be a rubber gasket or other flexible material. The elasticity and deformability of the sealing gasket 353 can be used to seal the interface of the cable conduit 35 and ensure that the vibrating tube 32 can still be properly connected even when it is slightly deformed.

[0043] Optionally, the ends of the cables 351 in different sub-conduits are provided with cable interfaces 352, and the sub-conduits and cable interfaces 352 are provided with matching interfaces and mating covers 39. The mating covers 39 are movably fixed to the matching interfaces, thereby improving the convenience of connecting the cables 351.

[0044] In one embodiment, the sub-pipes are fixedly connected by flanges 34, and the interface can be located on one side of flange 34. After connecting the sub-pipes together via flanges 34, the mating cover 39 is opened, and the upper and lower cables 351 are connected through cable interfaces 352. The cable 351 is slightly longer than the cable conduit 35, providing some operating space for the operator. At the same time, the cable 351 of the lower sub-pipe can be fixed at the pipe opening to prevent the cable 351 from falling into the cable conduit 35 due to gravity, thus preventing connection failure.

[0045] Optionally, multiple second excitation sources 4 are spaced apart along the axial direction of the vibrating tube 32 at the bottom of the vibrating tube 32, and each second excitation source 4 has the same vibration frequency. Among them, the multiple second excitation sources 4 can be arranged vertically in the bottommost sub-tube of the vibrating tube 32.

[0046] Optionally, the initial phase and position of the second excitation source 4 are calculated based on the excitation source calculation formula, which is:

[0047] In the formula, The initial phase of the i-th second excitation source 4, The initial phase of the j-th second excitation source 4, Let be the propagation distance from the i-th second excitation source 4 to the target point. Let be the propagation distance from the j-th second excitation source 4 to the target point. The target point can be the soil to be compressed.

[0048] In one embodiment, in order to maximize the lateral excitation force at the discharge port 33, the distance between the second excitation source 4 and the discharge port 33, and the excitation waves of each excitation source, should meet the following requirements: The vibration of the second excitation source 4 is a simple harmonic motion with the same frequency, which can be denoted as ω. The second excitation source 4 is arranged along the same vertical axis, which can be denoted as the x-axis. The position coordinates of the second excitation source 4 are x1, x2, ..., x N The location of the flared opening 38 of the discharge port 33 is set to x. P The vibration wave velocity in the vibrating tube 32 is v; the amplitude of the i-th second excitation source 4 is... The initial phase is .

[0049] The expression for the simple harmonic wave displacement generated by the i-th second excitation source 4 at the target point xP is:

[0050] in: , Let be the propagation distance from the i-th excitation source to the target point; , Let be the wavelength of the simple harmonic wave corresponding to the simple harmonic vibration. This represents the phase delay during wave propagation (the longer the distance, the greater the phase delay). The combined amplitude of all second excitation sources 4. The maximum value is determined by the phase consistency of each component wave. The necessary and sufficient condition for the maximum combined amplitude is that the phase difference between all wave sources at the target point is equal to the sum of their phases. (k = 0, ±1, ±2, ..., integers). Therefore, based on the above, the formula for calculating the excitation source can be obtained: .

[0051] In one embodiment, the operation steps of the crushed stone pile construction equipment can be as follows: 1. Multiple second excitation sources 4 are installed inside the first sub-tube of the vibrating tube 32, and the vibration frequency of each second excitation source 4 is the same, and the following relationship is satisfied between any two excitation sources. ; 2. Install the next sub-pipe through flange 34; 3. Open the docking cover 39 and connect the cable 351 inside the sub-pipe; 4. Turn on the first vibration source 2 (vertical) and the second vibration source 4 (horizontal) to carry out the downward construction operation; 5. After the first sub-tube is lowered, shut down the first excitation source 2 (vertical) and the second excitation source 4 (lateral). 6. Remove flange 34 and use it to connect the next sub-pipe. Repeat steps 2 to 5. 7. Continue driving down to the pile bottom position required by the design; 8. Add stone material 5 to the feed hopper 31 and vibrate the lifting tube 32; 9. After the topmost sub-tube is completely pulled out, turn off the first excitation source 2 and the second excitation source 4; 10. Remove this sub-pipe and connect it to the next sub-pipe section via flange 34; 11. Open the docking cover 39 and connect the cable 351, start the first excitation source 2 and the second excitation source 4, and continue to pull upwards; 12. Repeat steps (8) to (11) until all sub-tubes are pulled out.

[0052] The crushed stone pile construction equipment provided in this application has the following advantages: By connecting multiple sub-pipes, the erection of ultra-high pile frames was avoided, ensuring the safety of the equipment. The diameter of the flared opening 38 of the discharge port 33 is consistent with the design pile diameter, while the diameters of the remaining sub-pipes are all smaller than the design pile diameter, which greatly reduces the side friction resistance between the vibrating pipe 32 and the soil, reduces equipment power consumption, and reduces equipment wear. By using the first excitation source 2 (vertical) and multiple second excitation sources 4 (lateral) as power sources, sufficient penetrating force is ensured, vibration energy loss from top to bottom is avoided during the construction of crushed stone piles, and the soil layer around the pile is fully compacted.

[0053] The terms "first," "second," "third," "fourth," "1," "2," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than that shown in the illustrations or text descriptions.

[0054] It should be understood that although arrows indicate various operation steps in the flowcharts of this application's embodiments, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of this application's embodiments, the implementation steps in each flowchart can be executed in other orders as required. Furthermore, some or all steps in each flowchart, based on the actual implementation scenario, may include multiple sub-steps or multiple stages. Some or all of these sub-steps or stages can be executed at the same time, and each sub-step or stage can also be executed at different times. In scenarios where execution times differ, the execution order of these sub-steps or stages can be flexibly configured according to requirements, and this application's embodiments do not limit this.

[0055] The above description is only an optional implementation method for some implementation scenarios of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application without departing from the technical concept of this application also fall within the protection scope of the embodiments of this application.

Claims

1. A stone pile construction device, characterized in that, include: Vibratory tubes are used to be inserted into the soil to form the pile holes corresponding to the crushed stone piles. The first excitation source is located at the top of the crushed stone pile and is used to provide a downward penetrating force to the vibrating tube. Multiple second excitation sources are provided at the bottom of the vibrating tube to resonate at the bottom of the vibrating tube and provide a lateral vibration force to the vibrating tube.

2. The stone pile construction equipment according to claim 1, characterized in that, The vibrating tube includes multiple sub-tubes connected in sequence. The first excitation source is located on the topmost sub-tube, and multiple second excitation sources are located on the bottommost sub-tube.

3. The stone pile construction equipment according to claim 2, characterized in that, The top of the top sub-pipe is equipped with a feed hopper to prevent the stones from scattering, and the bottom of the bottom sub-pipe is equipped with a discharge port.

4. The stone pile construction equipment according to claim 3, characterized in that, The discharge port is equipped with a hinged plate and a rotating shaft. The rotating shaft is fixed to the discharge port, and one side of the hinged plate is rotatably fixed to the rotating shaft. The hinged plate is used to seal the discharge port when the vibrating tube is lowered and to open the discharge port when the vibrating tube is lifted.

5. The stone pile construction equipment according to claim 2, characterized in that, The second excitation source is fixed to the wall of the sub-tube, and a cable conduit is provided inside the sub-tube. The second excitation source is connected to the cable in the cable conduit.

6. The stone pile construction equipment according to claim 5, characterized in that, The contact side of the adjacent sub-pipe is provided with a pipe interface of the cable pipe, the pipe interface including a male port and a female port; A sealing gasket is provided on the side of the male and female openings that are in contact with each other.

7. The stone pile construction equipment according to claim 6, characterized in that, The cable ends in the sub-tubes are provided with cable interfaces, and the sub-tubes and cable interfaces are provided with a mating interface and a mating cover at the corresponding positions. The mating cover is movably fixed to the mating interface.

8. The stone pile construction equipment according to claim 1, characterized in that, The system includes a pile frame with a sliding track, a top slider, and a traction rope. The top slider is slidably fixed to the sliding track and is connected to the traction rope and the first excitation source. The traction rope is used to drive the first excitation source and the top slider to slide along the sliding track.

9. The stone pile construction equipment according to claim 1, characterized in that, The plurality of second excitation sources are spaced apart along the axial direction of the vibrating tube at the bottom of the vibrating tube, and each second excitation source has the same vibration frequency.

10. The stone pile construction equipment according to claim 9, characterized in that, The initial phase and position of the second excitation source are calculated based on the excitation source calculation formula, which is: In the formula, Let i be the initial phase of the i-th second excitation source. Let j be the initial phase of the second excitation source. Let be the propagation distance from the i-th second excitation source to the target point. Let be the propagation distance from the j-th second excitation source to the target point.

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