A soft soil foundation rolling and tamping device and method

Abstract

The application discloses a soft soil foundation rolling and ramming equipment and method, and belongs to the technical field of soft foundation treatment, which comprises an outer column, an ear plate fixedly connected to the outer column and used for connecting a mobile control equipment, a rammer slidingly connected to the inner column, a hydraulic drive mechanism fixedly connected to the top of the outer column, the movable end of the hydraulic drive mechanism penetrating into the inner column and being connected with the rammer, a supporting plate slidingly connected to the bottom of the outer column, the top of the supporting plate being correspondingly arranged with the rammer, the bottom of the supporting plate being detachably connected with a ramming plate, the ramming plate extending out of the end of the outer column and being used for ramming the ground. The ear plate is used for quickly docking the existing mobile equipment, the cost is reduced, the complex site is adapted, and the sinking is prevented. The outer column is used for guiding and ensuring that the rammer vertically impacts, and the uniformity of the foundation bearing capacity is improved. The hydraulic drive is used for realizing the ramming on demand, and the substandard ramming or the damage of the soft soil is avoided. The sliding supporting plate is used for adapting the settlement and guaranteeing the continuous transmission of the force. The detachable ramming plate is used for adapting the scene and being easy to maintain. The whole equipment realizes the "five unifications", improves the efficiency and quality, and takes into account the economy and practicability.

Description

Technical Field

[0001] This invention belongs to the field of soft soil foundation treatment technology, and particularly relates to a soft soil foundation compaction equipment and method. Background Technology

[0002] In infrastructure construction such as highways, railways, and building engineering, soft soil is characterized by high water content, large porosity, low bearing capacity, and high compressibility. If not effectively treated, it is highly susceptible to uneven settlement and foundation instability during project operation, severely impacting the safety and durability of buildings, roadbeds, and other structures. Therefore, the compaction and reinforcement of soft soil foundations is a crucial step in engineering construction. Its core objective is to reduce the porosity of soft soil and increase its density through external compression, thereby enhancing the foundation's bearing capacity and stability.

[0003] Currently, the commonly used soft soil foundation compaction equipment in the industry mainly includes dynamic compaction machines, hydraulic compactors, and vibratory rollers. Among them, although dynamic compaction machines have a large impact force, the equipment is bulky and inconvenient to move. It requires a special tracked chassis to adapt to soft soil surfaces, which not only results in high manufacturing costs, but also has the problems of high requirements for operating sites and insufficient turning flexibility, making it difficult to adapt to irregular soft soil construction areas.

[0004] Regarding the core performance of compaction operations, existing equipment still has many shortcomings that urgently need to be addressed: First, the controllability of the power drive mode is insufficient. Mechanically driven equipment cannot adjust the impact force and frequency according to real-time parameters such as the moisture content and initial density of soft soil, which can easily lead to insufficient compaction or excessive impact, resulting in damage to the soft soil structure. Second, the connection method of the tamping plates is defective. Some use fixed connections, making it difficult to replace tamping plates of different sizes and shapes according to operational needs, resulting in poor adaptability.

[0005] Furthermore, existing compaction equipment generally suffers from insufficient impact protection and rapid component wear, further restricting the efficiency and quality of soft soil foundation compaction. Therefore, developing a simple, power-controllable, adaptable, and easy-to-maintain soft soil foundation compaction equipment and method has become an urgent need to address the current pain points in soft soil foundation treatment technology. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a compaction device and method for soft soil foundations.

[0007] To achieve the above objectives, the present invention provides a soft soil foundation compaction device, comprising: an outer column, an ear plate fixedly connected to the outer column for connecting a movement control device; a tamping hammer slidably connected inside the outer column, a hydraulic drive mechanism fixedly connected to the top of the outer column, the movable end of the hydraulic drive mechanism extending into the outer column and connected to the tamping hammer; and a receiving plate slidably connected to the bottom of the outer column, the top of the receiving plate corresponding to the tamping hammer, and a tamping plate detachably connected to the bottom, the tamping plate extending out of the end of the outer column for compacting the ground.

[0008] Optionally, the outer column has multiple elongated holes on its bottom circumference, and a first connecting plate is fixedly connected to the side wall of the receiving plate corresponding to the elongated holes. The first connecting plate is slidably connected to the elongated holes.

[0009] Optionally, the top of the ramming plate is connected to a connecting column, and the bottom of the side wall of the connecting column is fixedly connected to the first connecting plate. The first connecting plate and the second connecting plate are fastened by bolts, so that the top of the ramming plate and the bottom of the receiving plate abut against each other. The second connecting plate and the ramming plate are both located on the outer side of the end of the outer column.

[0010] Optionally, the bottom of the receiving plate is provided with a groove, and the top surface of the docking column has a protrusion corresponding to the groove.

[0011] Optionally, an initial velocity spring is fixed to the top of the inner cavity of the outer column.

[0012] Optionally, a buffer cavity is provided inside the hammer, and a snap-fit ​​plate is fixedly connected to the movable end of the hydraulic drive mechanism. The snap-fit ​​plate is snapped into the buffer cavity, and an anti-impact elastic element is provided between the top surface of the snap-fit ​​plate and the top surface of the buffer cavity.

[0013] Optionally, ventilation strips are provided on the side wall of the outer column.

[0014] Optionally, the inner wall array of the outer column is provided with multiple rollers, which make rolling contact with the outer wall of the ram.

[0015] Optionally, a soil scraping ring is fixed to the bottom of the outer column.

[0016] A method for compacting soft soil foundations, using the aforementioned soft soil foundation compaction equipment, includes the following steps: Construction preparation: Quickly connect the equipment to the mobile control device via the ear plate fixed to the outside of the outer column. Select a tamping plate of suitable size and shape according to the size of the working area and the initial compaction parameters of the soft soil foundation. Detachably connect the tamping plate to the support plate at the bottom of the outer column, ensuring that the connection between the tamping plate and the support plate is stable and extends beyond the end of the outer column. Check the sliding flexibility of the hammer inside the outer column and the reliability of the connection between the hydraulic drive mechanism and the hammer to ensure that the equipment is in normal working condition. Operation positioning: The mobile control device drives the entire equipment to move to the soft soil foundation area to be compacted, and the position of the equipment is adjusted to keep the outer column vertical and the tamping plate completely in contact with the ground to avoid the initial contact deviation from affecting the compaction effect; Layered compaction: The hydraulic drive mechanism is activated, and the moving end of the hydraulic drive mechanism drives the ram to move vertically upward along the inner cavity of the outer column to a preset height. Then the hydraulic drive mechanism stops supplying oil, and the ram falls vertically along the outer column under its own gravity, impacting the support plate and transmitting the impact force to the ramming plate through the support plate. The ramming plate then vertically compacts the soft soil foundation. Parameter adaptation: Based on the real-time compaction feedback of the soft soil foundation, the lifting height, striking force, and impact frequency of the tamping hammer are precisely adjusted through the hydraulic drive mechanism; Area coverage: The mobile control device moves the equipment along the preset operation path to continuously compact the soft soil foundation area by area, ensuring that no work surface is missed; Work completion: After all areas have been compacted, shut down the hydraulic drive mechanism, move the equipment to the outside of the work site using the mobile control device, disassemble the tamping plate for cleaning or maintenance, disconnect the equipment from the mobile control device, and complete the compaction operation.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects: The ear plates fixed to the outer side of the outer column can be directly and quickly connected to existing mobile control equipment such as excavators and cranes, eliminating the need for a separately designed dedicated mobile mechanism. This reduces equipment R&D and manufacturing costs and leverages the flexibility and mobility of mobile equipment to adapt to irregular soft soil foundation construction sites and varying operating ranges, avoiding the problem of dedicated mobile equipment getting stuck due to the low bearing capacity of soft soil. The outer column acts as a guide for the tamping hammer, ensuring that the hammer always slides vertically, completely solving the impact deviation problem that is common in traditional compaction equipment. This ensures that the impact force acts vertically on the soft soil foundation, preventing the soft soil from reducing compaction density due to lateral extrusion, and significantly improving the uniformity of foundation bearing capacity. The top hydraulic drive mechanism is directly connected to the tamping hammer. Compared to mechanical drive, hydraulic power output is more stable and controllable, and can be adjusted according to the soft soil moisture content, initial density, etc. Precise parameter adjustments to the hammer's lifting height, striking force, and frequency enable "on-demand compaction," avoiding substandard compaction due to insufficient power and preventing damage to soft soil structures from excessive impact. A sliding support plate at the bottom of the outer column stabilizes the tamping plate and provides downward space as the tamping plate withstands multiple impacts, adapting in real-time to settlement and deformation during soft soil foundation compaction. This ensures continuous and effective transmission of hammer impact force to the foundation, preventing force interruption due to foundation settlement. The detachable tamping plate extending from the outer column allows for quick replacement with different sizes and shapes to suit confined areas or improve efficiency in large-area construction. It can also be easily disassembled, cleaned, and replaced after wear and adhesion of soft soil, reducing maintenance costs and downtime, and ensuring consistent compaction quality. The overall structure achieves an organic unity of convenient connection, precise guidance, controllable dynamics, adaptability to deformation, and ease of maintenance, effectively improving the efficiency and quality of soft soil foundation compaction, ensuring that the bearing capacity after foundation treatment meets engineering requirements, while taking into account economy and practicality, and solving many core pain points in soft soil foundation treatment. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the soft soil foundation compaction equipment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the soft soil foundation compaction equipment of the present invention; Figure 3 This is a schematic diagram of the connection of the ramming plate in this invention.

[0019] In the diagram: 1. Outer column; 2. Ear plate; 3. Hammer; 4. Hydraulic drive mechanism; 5. Support plate; 6. Rammer plate; 7. Long slot; 8. First connecting plate; 9. Connecting column; 10. Second connecting plate; 11. Bolt; 12. Initial velocity spring; 13. Buffer chamber; 14. Clip plate; 15. Anti-impact elastic element; 16. Ventilation strip; 17. Roller; 18. Scraper ring. Detailed Implementation

[0020] The technical solutions of 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figures 1 to 3 As shown, this embodiment provides a soft soil foundation compaction device, including: an outer column 1, with an ear plate 2 fixedly connected to the outside of the outer column 1 for connecting a mobile control device; a tamping hammer 3 slidably connected inside the outer column 1, and a hydraulic drive mechanism 4 fixedly connected to the top of the outer column 1, the movable end of the hydraulic drive mechanism 4 extending into the outer column 1 and connected to the tamping hammer 3; a receiving plate 5 slidably connected to the bottom of the outer column 1, the top of the receiving plate 5 corresponding to the tamping hammer 3, and a tamping plate 6 detachably connected to the bottom, the tamping plate 6 extending out of the end of the outer column 1 for compacting the ground.

[0023] The ear plate 2 fixed to the outer side of the outer column 1 can be directly and quickly connected to existing mobile control equipment such as excavators and cranes without the need for a separate dedicated mobile mechanism. This reduces equipment R&D and manufacturing costs and leverages the flexibility and mobility of mobile equipment to adapt to irregular soft soil foundation construction sites and varying operating ranges, avoiding the problem of dedicated mobile equipment getting stuck due to the low bearing capacity of soft soil. The outer column 1 serves as a guide for the tamping hammer 3, ensuring that the hammer 3 always slides vertically. This completely solves the problem of impact deviation that is common in traditional compaction equipment, ensuring that the impact force acts vertically on the soft soil foundation and preventing the soft soil from reducing compaction density due to lateral extrusion, thus significantly improving the uniformity of foundation bearing capacity. The top hydraulic drive mechanism 4 is directly connected to the tamping hammer 3. Compared with mechanical drive, hydraulic power output is more stable and controllable, and can be adjusted according to parameters such as soft soil moisture content and initial density. The precise adjustment of the lifting height, striking force, and frequency of the tamping hammer 3 enables "compaction on demand," avoiding substandard compaction due to insufficient power and preventing damage to the soft soil structure caused by excessive impact. The support plate 5, which is slidably connected to the bottom of the outer column 1, serves two purposes: firstly, it stabilizes the connection to the tamping plate 6; secondly, it can slide at the bottom of the outer column 1, providing downward space when the tamping plate 6 receives multiple impacts, adapting in real time to the settlement and deformation during the compaction process of the soft soil foundation, ensuring that the impact force of the tamping hammer 3 is continuously and effectively transmitted to the foundation, and avoiding interruption of force due to foundation settlement. The detachable tamping plate 6 extending from the end of the outer column 1 can not only be quickly replaced with different sizes and shapes to adapt to operations in confined areas or improve the efficiency of large-area construction, but also can be easily disassembled, cleaned, and replaced after wear and adhesion of soft soil, reducing maintenance costs and downtime, and ensuring the stability of compaction quality. The overall structure achieves an organic unity of convenient connection, precise guidance, controllable dynamics, adaptability to deformation, and ease of maintenance, effectively improving the efficiency and quality of soft soil foundation compaction, ensuring that the bearing capacity after foundation treatment meets engineering requirements, while taking into account economy and practicality, and solving many core pain points in soft soil foundation treatment.

[0024] In some alternative implementations, the bottom circumferential surface of the outer column 1 is provided with a plurality of elongated holes 7, and the side wall of the receiving plate 5 is fixedly connected to the elongated holes 7, and the first connecting plate 8 is slidably connected to the elongated holes 7.

[0025] The circumferentially evenly distributed elongated holes 7 and the first connecting plate 8 form a multi-point sliding guide structure, which ensures that the bearing plate 5 always slides smoothly along the vertical direction of the outer column 1, avoiding tilting or displacement of the bearing plate 5 due to uneven impact force on the soft soil foundation. This ensures that the impact force of the hammer 3 is vertically transmitted to the ramming plate 6 and the foundation, preventing lateral extrusion of soft soil and improving the uniformity of compaction density. At the same time, the structural design of the elongated holes 7 provides the bearing plate 5 with a clear and sufficient downward stroke, perfectly adapting to the gradual settlement and deformation during the repeated compaction of the soft soil foundation, ensuring that the bearing plate 5 moves smoothly without jamming, ensuring the continuous and effective transmission of impact force, and avoiding force interruption.

[0026] In some alternative implementations, the top of the ramming plate 6 is connected to the docking column 9, and the bottom of the side wall of the docking column 9 is fixed to the first connecting plate 8. The first connecting plate 8 and the second connecting plate 10 are fastened by bolts 11, so that the top of the ramming plate 6 and the bottom of the receiving plate 5 abut against each other. The second connecting plate 10 and the ramming plate 6 are both located on the outer side of the end of the outer column 1.

[0027] The mating fit between the connecting column 9 and the bearing plate 5 forms a surface contact force-bearing structure. Combined with the fastening of the bolts 11 on the first and second connecting plates 10, a double-stable connection system is constructed. This system can resist the high-frequency impact loads during the compaction of soft soil foundations, preventing loosening or displacement of the tamping plate 6 and the bearing plate 5, ensuring efficient and lossless transmission of impact force from the bearing plate 5 to the tamping plate 6. It also ensures that the tamping plate 6 remains horizontal, preventing uneven compaction force due to connection misalignment, and further improving the uniformity of the soft soil foundation's density. The bolts 11 are detachable. The unloading design, combined with the layout of the second connecting plate 10 and the ramming plate 6 located on the outside of the outer column 1, greatly expands the disassembly and assembly operation space. The replacement and cleaning of the ramming plate 6 can be completed quickly without going deep into the outer column 1, significantly reducing maintenance difficulty and downtime. It is suitable for scenarios in soft soil foundation construction where the ramming plate 6 needs to be flexibly replaced according to the water content and settlement. At the same time, the outer layout avoids interference between the connecting structure and the sliding mechanism inside the outer column 1, ensuring that the downward sliding of the receiving plate 5 inside the outer column 1 is not affected, and ensuring its core function of adapting to the settlement and deformation of soft soil foundation.

[0028] In some alternative implementations, the bottom of the receiving plate 5 is provided with a groove, and the top surface of the connecting post 9 has a protrusion corresponding to the groove.

[0029] The interlocking of the boss and the groove forms a precise positioning structure, allowing for rapid coaxial alignment of the connecting column 9 and the receiving plate 5 during installation. This prevents misalignment before the bolts 11 are tightened, improving equipment assembly efficiency and ensuring the tamping plate 6 remains horizontal. This prevents uneven compaction force due to installation deviations and ensures uniform compaction density of the soft soil foundation. The interlocking structure and the bolt 11 tightening structure form a dual stabilization system of "mechanical positioning + bolt 11 fixing," effectively resisting high-frequency impact loads during soft soil foundation compaction. This prevents relative displacement or loosening between the tamping plate 6 and the receiving plate 5, ensuring that the impact force is effectively absorbed by the receiving plate. The efficient and lossless transfer of energy from plate 5 to the connecting column 9 and then to the tamping plate 6 improves the energy utilization rate of compaction. At the same time, the surface contact between the boss and the groove increases the contact area between the two, disperses the local stress caused by impact load, avoids deformation and damage to the receiving plate 5 or the connecting column 9 due to stress concentration, and extends the service life of the components. In addition, this structure does not affect the sliding function of the receiving plate 5 in the outer column 1. While ensuring the stability of the connection, it can still allow the receiving plate 5 to move smoothly downward to adapt to the settlement and deformation of the soft soil foundation, taking into account both connection reliability and functional compatibility, and providing further structural support for high-quality and continuous compaction of soft soil foundations.

[0030] In some alternative embodiments, an initial velocity spring 12 is fixed to the top of the inner cavity of the outer column 1.

[0031] The initial velocity spring 12 and the hydraulic drive mechanism 4 form a synergistic power system of "hydraulic lifting + elastic energy storage". When the hydraulic drive mechanism 4 drives the tamping hammer 3 upward, the spring is simultaneously compressed and accumulates elastic potential energy. After the hydraulic oil supply stops, the tamping hammer 3 descends under its own gravity, and the spring instantly releases the elastic potential energy, giving the tamping hammer 3 an additional initial velocity. This significantly increases the impact kinetic energy of the tamping hammer 3. Compared with the method of relying solely on gravity or hydraulic drive, it can generate a stronger compaction impact force, effectively overcoming the characteristics of high water content and low bearing capacity of soft soil foundations, quickly compressing the pores of soft soil and improving the density of the foundation. At the same time, the auxiliary output of elastic potential energy can reduce the load on the hydraulic drive mechanism 4. The required impact force can be achieved without excessively increasing the hydraulic pressure or the stroke of the tamping hammer 3. This reduces the energy consumption and wear of the hydraulic system, extends the service life of the equipment, and can increase the impact frequency of the tamping hammer 3 while ensuring the compaction effect, thus shortening the soft soil foundation treatment cycle.

[0032] In some alternative embodiments, a buffer cavity 13 is provided inside the hammer 3, and a snap-fit ​​plate 14 is fixedly connected to the movable end of the hydraulic drive mechanism 4. The snap-fit ​​plate 14 is snapped into the buffer cavity 13, and an anti-impact elastic element 15 is provided between the top surface of the snap-fit ​​plate 14 and the top surface of the buffer cavity 13.

[0033] The anti-impact elastic element 15 directly absorbs the reverse impact force after the tamping hammer 3 strikes the soft soil foundation through its own elastic deformation, achieving the first buffer and preventing the rigid back impact from being transmitted to the hydraulic drive mechanism 4, thus protecting the core components. The snap-fit ​​plate 14 snaps into the buffer cavity 13, and its cooperation with the wall of the buffer cavity 13 forms a closed chamber. When the tamping hammer 3 moves in the reverse direction due to the back impact, the snap-fit ​​plate 14 slides synchronously in the buffer cavity 13, compressing the gas in the chamber. The gas compression does work to further consume the back impact force, forming a secondary buffer. Combined with the deformation of the elastic element, it achieves the effect of multiple buffer impacts. At the same time, the pressure generated after the gas in the buffer cavity 13 is compressed can reduce the sliding tendency of the moving end of the hydraulic drive mechanism 4, ensuring that the tamping hammer 3 and the hydraulic drive mechanism 4 keep moving synchronously, avoiding the loss of compaction kinetic energy due to the buffer structure. It perfectly balances the back impact protection and the compaction effect, which not only solves the problem of component damage caused by back impact in traditional equipment, but also ensures the compaction strength required for the soft soil foundation, achieving the unity of "efficient protection + stable compaction".

[0034] In some alternative implementations, ventilation strips 16 are provided on the sidewall of the outer column 1.

[0035] The ventilation strip 16 can balance the air pressure inside the outer column 1 and outside in real time. When the hammer 3 slides up and down at high speed inside the outer column 1, it can quickly discharge or introduce air, avoid negative pressure resistance or positive pressure obstruction caused by the alternating air pressure in the inner cavity, ensure smooth movement of the hammer 3, reduce the energy consumption of the hydraulic drive mechanism 4, and eliminate the problem of unstable impact rhythm of the hammer 3 caused by air pressure difference, thus ensuring the uniformity of the tamping force.

[0036] In some alternative implementations, the inner wall of the outer column 1 is provided with a plurality of rollers 17, which make rolling contact with the outer wall of the ramming hammer 3.

[0037] The array of rollers 17 forms a multi-point rolling support, which transforms the sliding friction between the tamping hammer 3 and the inner wall of the outer column 1 into rolling friction. This significantly reduces the frictional resistance when the tamping hammer 3 moves up and down, reducing the energy consumption of the hydraulic drive mechanism 4 and preventing rapid wear of components caused by sliding friction, thus extending the service life of the tamping hammer 3 and the outer column 1. At the same time, the array of rollers 17 can guide and limit the tamping hammer 3 from all directions, ensuring that the tamping hammer 3 always moves vertically along the outer column 1. This perfectly solves the problem of impact deviation caused by uneven friction or guidance deviation in traditional compaction equipment, ensuring that the impact force acts vertically on the soft soil foundation, preventing the soft soil from being squeezed out laterally, and improving the uniformity of the foundation density.

[0038] In some alternative implementations, a scraper ring 18 is fixed to the bottom of the outer column 1.

[0039] The scraper ring 18 surrounds the bottom of the outer column 1 and is fitted to the outer wall of the connecting column 9. It can scrape away soft soil, mud and other debris adhering to the outer wall of the connecting column 9 in real time during the equipment compaction operation and the sliding of the receiving plate 5. This prevents such sticky impurities from accumulating and solidifying in the gap between the connecting column 9 and the inner wall of the outer column 1, and fundamentally solves the problem of poor sliding of the connecting column 9 caused by impurities.

[0040] A method for compacting soft soil foundations, using the aforementioned soft soil foundation compaction equipment, includes the following steps: Construction preparation: Quickly connect the equipment to the mobile control equipment via the ear plate 2 fixed to the outside of the outer column 1. Select a tamping plate 6 of suitable size and shape according to the size of the working area and the initial compaction parameters of the soft soil foundation. Detachably connect the tamping plate 6 to the support plate 5 at the bottom of the outer column 1, ensuring that the connection between the tamping plate 6 and the support plate 5 is stable and extends beyond the end of the outer column 1. Check the sliding flexibility of the tamping hammer 3 inside the outer column 1 and the reliability of the connection between the hydraulic drive mechanism 4 and the tamping hammer 3 to ensure that the equipment is in normal working condition. Operation positioning: Move the entire equipment to the soft soil foundation area to be compacted by using the mobile control equipment, adjust the position of the equipment to keep the outer column 1 vertical and the compaction plate 6 completely in contact with the ground to avoid the initial contact deviation affecting the compaction effect; Layered compaction: The hydraulic drive mechanism 4 is activated, and the moving end of the hydraulic drive mechanism 4 drives the ram 3 to move vertically upward along the inner cavity of the outer column 1 to a preset height. Then the hydraulic drive mechanism 4 stops supplying oil, and the ram 3 falls vertically along the outer column 1 under its own weight, impacting the support plate 5 and transmitting the impact force to the ramming plate 6 through the support plate 5. The ramming plate 6 then vertically compacts the soft soil foundation. During multiple impacts, the support plate 5 slides along the bottom of the outer column 1 and moves downward to adapt to the settlement deformation of the soft soil foundation after compaction, ensuring that the impact force of the ram 3 is continuously and effectively transmitted to the foundation and avoiding interruption of force. Parameter adaptation: Based on the real-time compaction feedback of the soft soil foundation, the lifting height, striking force and impact frequency of the tamping hammer 3 are precisely adjusted through the hydraulic drive mechanism 4; the lifting height and striking frequency are appropriately increased for areas with high water content and low compaction, and the impact intensity is reduced for areas that have been initially compacted, so as to achieve "compacting on demand" and avoid insufficient power leading to substandard compaction or excessive impact damaging the soft soil structure. Area coverage: The mobile control device moves the equipment along the preset operation path to continuously compact the soft soil foundation area by area, ensuring that no work surface is missed; Work completion: After all areas have been compacted, shut down the hydraulic drive mechanism 4, move the equipment to the outside of the work site using the mobile control device, disassemble the tamping plate 6 for cleaning or maintenance, disconnect the equipment from the mobile control device, and complete the compaction operation.

[0041] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0042] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "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, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A soft soil foundation compaction device, characterized in that, include: An outer column (1) is fixedly connected to an ear plate (2) for connecting a mobile control device; a tamping hammer (3) is slidably connected inside the outer column (1); a hydraulic drive mechanism (4) is fixedly connected to the top of the outer column (1); the movable end of the hydraulic drive mechanism (4) extends into the outer column (1) and is connected to the tamping hammer (3); a receiving plate (5) is slidably connected to the bottom of the outer column (1); the top of the receiving plate (5) is correspondingly set with the tamping hammer (3); a tamping plate (6) is detachably connected to the bottom; the tamping plate (6) extends out of the end of the outer column (1) for compacting the ground.

2. The soft soil foundation compaction equipment according to claim 1, characterized in that, The outer column (1) has multiple elongated holes (7) on its bottom circumferential direction. The side wall of the receiving plate (5) is fixedly connected to the elongated holes (7) with a first connecting plate (8). The first connecting plate (8) is slidably connected to the elongated holes (7).

3. The soft soil foundation compaction equipment according to claim 2, characterized in that, The top of the ramming plate (6) is connected to a docking column (9), and the bottom of the side wall of the docking column (9) is fixed to a second connecting plate (10) corresponding to the first connecting plate (8). The first connecting plate (8) and the second connecting plate (10) are fastened by bolts (11), so that the top of the ramming plate (6) and the bottom of the receiving plate (5) abut against each other. The second connecting plate (10) and the ramming plate (6) are both located on the outer side of the end of the outer column (1).

4. The soft soil foundation compaction equipment according to claim 3, characterized in that, The bottom of the receiving plate (5) is provided with a groove, and the top surface of the connecting column (9) is provided with a protrusion corresponding to the groove.

5. The soft soil foundation compaction equipment according to claim 1, characterized in that, An initial velocity spring (12) is fixed to the top of the inner cavity of the outer column (1).

6. The soft soil foundation compaction equipment according to claim 1, characterized in that, The ram (3) has a buffer cavity (13) inside. The movable end of the hydraulic drive mechanism (4) is fixed with a snap plate (14). The snap plate (14) is snapped into the buffer cavity (13). An anti-impact elastic element (15) is provided between the top surface of the snap plate (14) and the top surface of the buffer cavity (13).

7. The soft soil foundation compaction equipment according to claim 1, characterized in that, Ventilation strips (16) are provided on the side wall of the outer column (1).

8. The soft soil foundation compaction equipment according to claim 1, characterized in that, The inner wall of the outer column (1) is provided with a plurality of rollers (17), which are in rolling contact with the outer wall of the hammer (3).

9. The soft soil foundation compaction equipment according to claim 1, characterized in that, The bottom of the outer column (1) is fixed with a soil scraping ring (18).

10. A method for compacting soft soil foundations, using the soft soil foundation compaction equipment described in any one of claims 1-9, characterized in that, Includes the following steps: Construction preparation: Quickly connect the equipment to the mobile control equipment by fixing the ear plate (2) to the outside of the outer column (1). According to the size of the working area and the initial compaction parameters of the soft soil foundation, select the appropriate size and shape of the ramming plate (6). Detachably connect the ramming plate (6) to the support plate (5) at the bottom of the outer column (1) to ensure that the ramming plate (6) is firmly connected to the support plate (5) and extends out of the end of the outer column (1). Check the sliding flexibility of the ramming hammer (3) inside the outer column (1) and the connection reliability between the hydraulic drive mechanism (4) and the ramming hammer (3) to ensure that the equipment is in normal working condition. Operation positioning: The mobile control device drives the entire equipment to move to the soft soil foundation to be compacted area, and the position of the equipment is adjusted so that the outer column (1) remains vertical and the tamping plate (6) is completely in contact with the ground to avoid the initial contact deviation affecting the compaction effect; Layered compaction: The hydraulic drive mechanism (4) is activated, and the hammer (3) is driven vertically upward along the inner cavity of the outer column (1) to a preset height through the movable end of the hydraulic drive mechanism (4). Then the hydraulic drive mechanism (4) stops supplying oil, and the hammer (3) falls vertically along the outer column (1) under its own gravity, impacting the support plate (5) and transmitting the impact force to the tamping plate (6) through the support plate (5). The tamping plate (6) then vertically compacts the soft soil foundation. Parameter adaptation: Based on the real-time compaction feedback of the soft soil foundation, the lifting height, striking force and impact frequency of the tamping hammer (3) are precisely adjusted through the hydraulic drive mechanism (4); Area coverage: The mobile control device moves the equipment along the preset operation path to continuously compact the soft soil foundation area by area, ensuring that no work surface is missed; Work completion: After all areas have been compacted, shut down the hydraulic drive mechanism (4), move the equipment to the outside of the work site using the mobile control device, disassemble the tamping plate (6) for cleaning or maintenance, disconnect the equipment from the mobile control device, and complete the compaction operation.

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