A strong compaction machine and construction method for strong compaction construction of soft soil foundation

Abstract

The present invention relates to the technical field of foundation treatment for water conservancy projects, and discloses a tamping machine and a construction method for tamping soft soil foundations, comprising a crane, a control component is connected to the top of one side of the crane, a rammer component is connected to the bottom of the control component, the crane comprises a machine body and a traction wire, the traction wire is located on the outside of the top of the machine body, the control component is connected to the bottom of the traction wire, the traction wire moves to above a designated tamping point, and the rammer component is controlled by the control component to fall to the designated tamping point for tamping.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering foundation treatment, in particular to a tamping machine for tamping soft soil foundation and a construction method. Background Art

[0002] In recent years, with the rapid development of my country's economy, a large number of water conservancy engineering construction projects have been continuously promoted, and the requirements for foundation bearing capacity have become increasingly higher, especially in the water-rich areas and coastal areas in the south, where soft soil foundations are widely present. Tamping soft soil foundations is one of the important steps in foundation treatment, which aims to improve the bearing capacity and stability of the foundation and reduce compressibility.

[0003] In the existing soft soil foundation tamping process, due to the large amount of water conservancy project construction and long construction period, the position of the tamping machine is frequently adjusted to tamp the soft soil foundation. On-site personnel need to frequently participate in the tamping point adjustment operation, which results in low construction efficiency and certain limitations in cost control.

[0004] To this end, the present invention provides a tamping machine and a construction method for tamping a soft soil foundation. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] A first aspect of the present invention provides a tamping machine for tamping construction of soft soil foundation, comprising a crane, a control component is connected to the top of one side of the crane, a rammer assembly is connected to the bottom of the control component, the crane comprises a body and a traction wire, the traction wire is located on the outside of the top of the body, the control component is connected to the bottom of the traction wire, the traction wire moves to above a designated tamping point, and the rammer assembly is controlled by the control component to fall to the designated tamping point for tamping.

[0007] Furthermore, a cross bar is rotatably provided on one side of the top of the machine body, a first motor is slidably connected to the outer side of the cross bar of the machine body, and the traction wire is slidably connected to the front side of the first motor.

[0008] The tamping range is expanded after the machine body is fixed, and the control assembly and the tamping hammer assembly are driven to move to different tamping points.

[0009] Furthermore, the rammer assembly includes a rammer body, the rammer body is a hollow structure, and a conical bottom block is fixedly connected to the bottom of the rammer body.

[0010] The main body of the rammer is a hollow structure, which enables it to reach a predetermined speed more quickly when falling, and produces a more uniform impact force when in contact with the soil, effectively compacting and tamping the soil.

[0011] Furthermore, the control component includes a flat plate, the bottom of the traction wire is fixedly connected to the top of the flat plate, the center of the bottom of the flat plate is connected to a driving component, and telescopic rod components are provided on the front and back sides of the bottom of the flat plate.

[0012] Furthermore, the driving assembly includes a second motor, the output shaft of the second motor is fixedly connected to a driving gear set, the driving gear set includes a driving gear and a driven gear, the center of the driven gear of the driving gear set is fixedly connected to a circular shaft, the front and back sides of the circular shaft of the driving gear set are fixedly connected to half gears, the front and back sides of the bottom of the flat plate are fixedly connected to a limiting horizontal plate, a movable hole is opened on the front side of the limiting horizontal plate, a rack is slidably engaged with the inner side of the movable hole of the limiting horizontal plate, and the teeth of the rack are meshed with the teeth of the half gear.

[0013] Furthermore, the telescopic rod assembly includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are interspersed and movably connected one by one, and a circular shaft is provided at the intersection of two adjacent first connecting rods and the second connecting rods. The first connecting rod and the second connecting rod together constitute a telescopic movable unit, and the bottoms of the first connecting rod and the second connecting rod located at the bottom and the top are movably connected with mounting ears, and the bottom of the mounting ear located on one side is slidably clamped with a sliding track.

[0014] The driving gear set performs one tamping operation when the gear rotates one circle, and this process is repeated until the tamping operation at this tamping point is completed, thereby increasing the tamping frequency and shortening the construction time.

[0015] Furthermore, a cleaning assembly for scraping off residual soil is arranged on the outer side of the rammer assembly, and the cleaning assembly includes a scraper, and a circular hole is arranged on the inner side of the scraper, and the inner side of the circular hole of the scraper is tightly fitted with the outer side of the rammer body.

[0016] The scraper scrapes away the residual soil outside the rammer body to avoid the loss of rammer energy.

[0017] Furthermore, movable holes are provided on the front and back sides of the scraper top, and the inner side of the movable hole of the scraper is slidably engaged with a limit rod. A central axis is provided through the centers of the two first connecting rod circular shafts located on the front and back sides of the bottom, and the central axis is rotatably connected to the first connecting rod circular shafts, and the front and back sides of the central axis are fixedly connected to the limit rod.

[0018] A second aspect of the present invention provides a construction method of a dynamic compaction machine for dynamic compaction construction of a soft soil foundation, using a dynamic compaction machine for dynamic compaction construction of a soft soil foundation as described above, comprising the following steps:

[0019] S1. On-site investigation, measurement and determination of the boundaries of the tamping area;

[0020] S2. Assemble and debug the compaction machine and check whether the cleaning components are operating normally;

[0021] S3. Select appropriate rammer weight and rammer height according to the geological report;

[0022] S4, accurately positioning the crane above the first tamping point;

[0023] S5, starting the crane and the cleaning assembly to cause the rammer assembly to rise to a set height, and then lowering it after confirming that there are no obstacles;

[0024] S6. Observe the landing point of the rammer assembly and record the ground reaction after each rammering;

[0025] S7, after completing the single-point tamping, sequentially move the first motor to the next tamping point, and after completing the tamping of the tamping points within the coverage area of ​​the machine body, move the crane to the next tamping area;

[0026] S8, repeat the above steps until the whole area is compacted;

[0027] S9. Carry out comprehensive inspection and evaluate the effectiveness of foundation reinforcement.

[0028] The beneficial effects of the present invention are:

[0029] 1. The present invention is provided with a crane, and the fixed position of the machine body is the tamping area. Different tamping points are determined according to the rotation direction of the cross bar and the position of the traction wire on the cross bar, so as to expand the tamping range after the machine body is fixed, and drive the control assembly and the tamping hammer assembly to move to different tamping points.

[0030] 2. The present invention is provided with a rammer assembly, the main body of which is a hollow structure, which can reach a predetermined speed faster when falling, and produce a more uniform impact force when contacting the soil, so as to effectively compact and tamp the soil. Figure 6 As shown, the rammer body and the conical bottom block have smooth appearance, and the overall wind resistance is smaller. Due to the specificity of its shape, the conical bottom block is easier to penetrate the hard shell layer and reach the soft soil layer.

[0031] 3. The present invention is provided with a control component, and the half gear cooperates with the rack. When the half gear is engaged with the rack, the rammer assembly is quickly pulled up. When the half gear is not engaged with the rack, the rammer assembly falls freely under the drive of the weight of the rammer assembly to tamp the land. The second motor drives the drive gear set to tamp the land once the gear rotates one circle, and this is repeated until the tamping operation at this tamping point is completed, thereby increasing the tamping frequency and shortening the construction time.

[0032] 4. The present invention is provided with a control component and a cleaning component that cooperate with each other. Due to the high humidity of the soil on the soft soil foundation, it is easy for soil to remain on the surface of the rammer body after tamping by the rammer assembly, and the residual soil on the outside of the rammer body will increase the resistance and friction when the rammer descends, resulting in the loss of tamping energy during the transmission process. The middle axis is movably connected with the first connecting rod circular shaft located at the bottom. The height of the first connecting rod circular shaft at the bottom is reduced, driving the middle axis to move downward relative to the rammer body. At this time, the scraper scrapes off the residual soil on the outside of the rammer body to avoid the loss of tamping energy of the rammer assembly. When the height of the first connecting rod circular shaft located at the bottom is increased, it drives the middle axis to move upward relative to the rammer body to avoid the scraper affecting the normal tamping operation when the rammer assembly tamps the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a side structural schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the bottom structure of the overall structure of the present invention;

[0035] Figure 3 yes Figure 2 A partial enlarged view of the middle part;

[0036] Figure 4 It is a schematic diagram of the structure of the control component in the present invention;

[0037] Figure 5 It is a structural schematic diagram of part of the structure of the present invention;

[0038] Figure 6 It is a structural schematic diagram of the rammer assembly in the present invention;

[0039] Figure 7 yes Figure 5 A partial enlarged view of point B in the middle.

[0040] Description of reference numerals:

[0041] 1. Crane; 101. Machine body; 102. First motor; 103. Traction wire; 2. Control assembly; 201. Plate; 202. Drive assembly; 2021. Second motor; 2022. Drive gear set; 2023. Limiting cross plate; 2024. Rack; 2025. Half gear; 203. Telescopic rod assembly; 2031. First connecting rod; 2032. Second connecting rod; 2033. Mounting ear; 2034. Sliding track; 3. Rammer assembly; 301. Rammer body; 302. Conical bottom block; 4. Cleaning assembly; 401. Scraper; 402. Limiting rod; 403. Central axis. DETAILED DESCRIPTION

[0042] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0043] like Figures 1 to 7 As shown, a tamping machine for tamping soft soil foundation according to an embodiment of the present invention is provided. Figure 1 , Figure 2 , including a crane 1, a control component 2 is connected to the top of one side of the crane 1, a rammer component 3 is connected to the bottom of the control component 2, the crane 1 includes a body 101 and a traction wire 103, the traction wire 103 is located on the outside of the top of the body 101, the control component 2 is connected to the bottom of the traction wire 103, the traction wire 103 moves to the top of the designated ramming point, and the rammer component 3 is controlled by the control component 2 to fall to the designated ramming point for tamping.

[0044] Please refer to Figure 1 , Figure 2 , Figure 3 A cross bar is rotatably provided on one side of the top of the machine body 101 , a first motor 102 is slidably connected to the outer side of the cross bar of the machine body 101 , and a traction wire 103 is slidably connected to the front side of the first motor 102 .

[0045] Specifically, the fixed position of the machine body 101 is the tamping area, and different tamping points are determined according to the rotation direction of the cross bar and the position of the traction wire 103 on the cross bar, thereby expanding the tamping range after the machine body 101 is fixed, and driving the control component 2 and the rammer component 3 to move to different tamping points.

[0046] Please refer to Figure 6 The rammer assembly 3 includes a rammer body 301 . The rammer body 301 is a hollow structure, and a conical bottom block 302 is fixedly connected to the bottom of the rammer body 301 .

[0047] Specifically, the rammer body 301 is a hollow structure, which can reach a predetermined speed faster when falling, and produce a more uniform impact force when contacting the soil, effectively compacting and tamping the soil. Figure 6 As shown, the rammer body 301 and the conical bottom block 302 have smooth appearances and smaller overall wind resistance. The conical bottom block 302 is more convenient to penetrate the hard crust layer and directly reach the soft soil layer due to the specificity of its shape.

[0048] Please refer to Figure 3 , Figure 4 , Figure 5The control component 2 includes a flat plate 201, the bottom of the traction wire 103 is fixedly connected to the top of the flat plate 201, the center of the bottom of the flat plate 201 is connected to a driving component 202, and the front and back sides of the bottom of the flat plate 201 are both provided with telescopic rod components 203.

[0049] Please refer to Figure 3 , Figure 4 The driving assembly 202 includes a second motor 2021, and the output shaft of the second motor 2021 is fixedly connected to a driving gear set 2022. The driving gear set 2022 includes a driving gear and a driven gear. The center of the driven gear of the driving gear set 2022 is fixedly connected to a circular shaft, and the front and back sides of the circular shaft of the driving gear set 2022 are fixedly connected to a half gear 2025. The front and back sides of the bottom of the flat plate 201 are fixedly connected to a limiting horizontal plate 2023. A movable hole is opened on the front side of the limiting horizontal plate 2023. A rack 2024 is slidably engaged with the inner side of the movable hole of the limiting horizontal plate 2023, and the teeth of the rack 2024 are meshed with the teeth of the half gear 2025.

[0050] Specifically, starting the second motor 2021 causes the output shaft of the second motor 2021 to drive the active gear of the driving gear set 2022 to rotate, and the active gear of the driving gear set 2022 drives the driven gear of the driving gear set 2022 to rotate. When the driven gear of the driving gear set 2022 rotates, it drives the circular axis of the driving gear set 2022 to rotate, thereby driving the half gears 2025 on both sides to rotate. The outer side area of ​​half of the circumference of the half gear 2025 is provided with teeth, and the outer side of the remaining half is not provided with teeth. When the outer side of the part of the half gear 2025 provided with teeth moves to the bottom of the rack 2024 and meshes with the rack 2024, it can drive the rack 2024 to slide along the movable hole of the limiting horizontal plate 2023.

[0051] Please refer to Figure 3 , Figure 4 The telescopic rod assembly 203 includes a first connecting rod 2031 and a second connecting rod 2032, which are interspersed and movably connected one by one. A circular shaft is provided at the intersection of two adjacent first connecting rods 2031 and the second connecting rod 2032. The first connecting rod 2031 and the second connecting rod 2032 together constitute a telescopic movable unit. The bottoms of the first connecting rod 2031 and the second connecting rod 2032 located at the bottom and the top are movably connected with mounting ears 2033, and the bottoms of the mounting ears 2033 located on one side are slidably clamped with sliding rails 2034.

[0052] Specifically, Figure 3 and Figure 4As shown, a round rod is fixedly connected to one side of the rack 2024 close to the sliding track 2034, and the outer diameter of the round rod of the rack 2024 matches the inner height clearance of the movable hole of the limiting horizontal plate 2023, and the side of the round rod of the rack 2024 away from the rack 2024 is fixedly connected to the mounting ear 2033 located on the inner side of the sliding track 2034, and when the rack 2024 moves, it can drive the mounting ear 2033 to move along the sliding track 2034;

[0053] Starting the driving component 202 makes the rack 2024 slide along the movable hole of the limiting horizontal plate 2023 until the angle between the first connecting rod 2031 and the second connecting rod 2032 is minimum. At this time, the longitudinal length of the single telescopic movable unit is the shortest, and the rammer assembly 3 is in the highest state. When the second motor 2021 is started to drive the half gear 2025 to rotate, the half gear 2025 engages with the rack 2024 to drive the telescopic movable unit to shorten and drive the overall height of the rammer assembly 3 to rise. When the half gear 2025 is not engaged with the rack 2024, the rammer assembly 3 falls freely under the drive of the weight of the rammer assembly 3 to tamp the ground, and the telescopic movable unit extends.

[0054] Please refer to Figure 5 , Figure 7 A cleaning assembly 4 for scraping off residual soil is arranged on the outer side of the rammer assembly 3. The cleaning assembly 4 includes a scraper 401. A circular hole is arranged on the inner side of the scraper 401. The inner side of the circular hole of the scraper 401 is tightly fitted with the outer side of the rammer body 301.

[0055] Please refer to Figure 7 A movable hole is provided on the front and back sides of the top of the scraper 401, and the inner side of the movable hole of the scraper 401 is slidably engaged with the limit rod 402. A central axis 403 is provided through the center of the two first connecting rods 2031 circular axes located on the front and back sides of the bottom. The central axis 403 is rotatably connected to the circular axes of the first connecting rods 2031, and the front and back sides of the central axis 403 are fixedly connected to the limit rod 402.

[0056] Specifically, when the telescopic movable unit is shortened, the rammer assembly 3 rises and leaves the tamping point. At this time, the height of the circular axis of the first connecting rod 2031 located at the bottom is reduced relative to when the longitudinal length of the telescopic movable unit is the longest, that is, the middle axis 403 moves downward relative to the rammer body 301 under the drive of the decreased height of the circular axis of the first connecting rod 2031, and scrapes off the residual soil outside the rammer body 301. When the telescopic movable unit is extended, the rammer assembly 3 performs free fall tamping, and the height of the circular axis of the first connecting rod 2031 located at the bottom rises. The middle axis 403 moves upward relative to the rammer body 301 under the drive of the increased height of the circular axis of the first connecting rod 2031, so as to prevent the scraper 401 from affecting the normal tamping operation when the rammer assembly 3 tamps the land.

[0057] When the longitudinal length of the telescopic movable unit changes and causes the mounting ear 2033 to move in the sliding track 2034, the circular axis position of the first connecting rod 2031 also moves laterally. At this time, the central axis 403 is driven to move laterally and can move along the movable hole of the scraper 401. A limiting block is set at the bottom of the limiting rod 402. The outer diameter of the limiting block of the limiting rod 402 is larger than the width of the movable hole of the scraper 401. When the central axis 403 rises, it drives the limiting rod 402 to rise and lifts the scraper 401. When the central axis 403 descends, it drives the limiting rod 402 to descend, and the scraper 401 falls along the limiting rod 402 to the top of the limiting block of the limiting rod 402.

[0058] A construction method of a dynamic compaction machine for dynamic compaction construction of a soft soil foundation, using the dynamic compaction machine for dynamic compaction construction of a soft soil foundation as described above, comprises the following steps:

[0059] S1. On-site investigation, measurement and determination of the boundaries of the tamping area;

[0060] S2, assemble and debug the dynamic compaction machine, and check whether the cleaning component 4 is operating normally;

[0061] S3. Select appropriate rammer weight and rammer height according to the geological report;

[0062] S4, accurately positioning the crane 1 above the first tamping point;

[0063] S5, start the crane 1 and the cleaning assembly 4 to cause the rammer assembly 3 to rise to a set height, and then lower it after confirming that there are no obstacles;

[0064] S6, observe the landing point of the rammer assembly 3, and record the ground reaction after each ramming;

[0065] S7, after completing the single-point tamping, the first motor 102 is moved in sequence to the next tamping point, and after the tamping of the tamping points within the coverage of the machine body 101 is completed, the crane 1 is moved to the next tamping area;

[0066] S8, repeat the above steps until the whole area is compacted;

[0067] S9. Carry out comprehensive inspection and evaluate the effectiveness of foundation reinforcement.

[0068] How it works

[0069] When using this device, first fix the machine body 101 in the designated tamping area, first rotate the cross bar of the machine body 101 to the straight line where the tamping point is located according to the tamping point, then adjust the position of the first motor 102 to above the designated tamping point, start the first motor 102 to adjust the length of the traction wire 103 to change the lifting height of the control component 2 and the tamping hammer component 3;

[0070] The second motor 2021 is started so that the output shaft of the second motor 2021 drives the driving gear of the driving gear set 2022 to rotate, and the driving gear of the driving gear set 2022 drives the driven gear of the driving gear set 2022 to rotate. When the driven gear of the driving gear set 2022 rotates, it drives the circular shaft of the driving gear set 2022 to rotate, thereby driving the half gears 2025 on both sides to rotate. The outer side area of ​​half of the circumference of the half gear 2025 is provided with teeth, and the outer side of the remaining half is not provided with teeth. The outer side of the part of the half gear 225 provided with teeth moves to the rack When the gear 2024 is at the bottom and meshed with the rack 2024, the rack 2024 can be driven to slide along the movable hole of the limit horizontal plate 2023. When the outer side of the half gear 2025 without teeth moves to the bottom of the rack 2024, the rammer assembly 3 is driven by the weight of the rammer assembly 3 to free fall and tamp the land. At this time, the telescopic movable unit is extended, and the second motor 221 drives the driving gear set 2022 to perform a tamping operation from one circle of the gear, and this is repeated until the tamping operation of this tamping point is completed, thereby increasing the tamping frequency.

[0071] When the telescopic movable unit is shortened, the rammer assembly 3 rises and leaves the tamping point. At this time, the height of the circular axis of the first connecting rod 2031 located at the bottom is reduced relative to when the longitudinal length of the telescopic movable unit is the longest, that is, the middle axis 403 moves downward relative to the rammer body 301 under the drive of the decrease in the height of the circular axis of the first connecting rod 2031, and scrapes off the residual soil on the outside of the rammer body 301. When the telescopic movable unit is extended, the rammer assembly 3 is free-falling for tamping. The height of the circular axis of the first connecting rod 2031 located at the bottom rises, and the middle axis 403 moves upward relative to the rammer body 301 under the drive of the increase in the height of the circular axis of the first connecting rod 2031, to prevent the scraper 401 from affecting the normal tamping operation when the rammer assembly 3 tamps the land. When the longitudinal length of the telescopic movable unit changes and causes the mounting ear 2033 to move in the sliding track 2034, the position of the circular axis of the first connecting rod 2031 also moves laterally. At this time, when the middle axis 403 moves laterally, it can move along the movable hole of the scraper 401.

[0072] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A compaction machine for compaction construction of soft soil foundation, comprising a crane (1), characterized in that: A control component (2) is connected to the top of one side of the crane (1), and a rammer component (3) is connected to the bottom of the control component (2). The crane (1) comprises a body (101) and a traction wire (103). The traction wire (103) is located outside the top of the body (101). The control component (2) is connected to the bottom of the traction wire (103). When the traction wire (103) moves to the top of a designated rammer point, the rammer component (3) is controlled by the control component (2) to fall to the designated rammer point for rammering. The control component (2) comprises a flat plate (201), the bottom of the traction wire (103) is fixedly connected to the top of the flat plate (201), the center of the bottom of the flat plate (201) is connected to a driving component (202), and telescopic rod components (203) are provided on the front and back sides of the bottom of the flat plate (201); The driving assembly (202) comprises a second motor (2021), the output shaft of the second motor (2021) is fixedly connected to a driving gear set (2022), the driving gear set (2022) comprises a driving gear and a driven gear, the center of the driven gear of the driving gear set (2022) is fixedly connected to a circular shaft, the front and back sides of the circular shaft of the driving gear set (2022) are fixedly connected to a half gear (2025), the front and back sides of the bottom of the flat plate (201) are fixedly connected to a limiting horizontal plate (2023), a movable hole is provided on the front side of the limiting horizontal plate (2023), a rack (224) is slidably engaged with the inner side of the movable hole of the limiting horizontal plate (2023), and the teeth of the rack (224) mesh with the teeth of the half gear (2025); The telescopic rod assembly (203) comprises a first connecting rod (2031) and a second connecting rod (2032), the first connecting rod (2031) and the second connecting rod (2032) are interlaced and movably connected one by one, a circular shaft is provided at the intersection of two adjacent first connecting rods (2031) and the second connecting rod (2032), the first connecting rod (2031) and the second connecting rod (2032) together form a telescopic movable unit, the bottoms of the first connecting rod (2031) and the second connecting rod (2032) located at the bottom and the top are movably connected with mounting ears (2033), and the bottom of the mounting ear (2033) located on one side is slidably connected with a sliding track (2034); A cleaning assembly (4) for scraping off residual soil is arranged on the outside of the rammer assembly (3), the cleaning assembly (4) comprising a scraper (401), a circular hole is arranged on the inside of the scraper (401), and the inside of the circular hole of the scraper (401) is tightly fitted with the outside of the rammer body (301); The front and back sides of the top of the scraper (401) are both provided with movable holes, the inner side of the movable hole of the scraper (401) is slidably engaged with a limit rod (402), a central axis (403) is provided through the center of the two circular axes of the first connecting rods (2031) located at the front and back sides of the bottom, the central axis (403) is rotatably connected to the circular axes of the first connecting rods (2031), and the front and back sides of the central axis (403) are both fixedly connected to the limit rods (402).

2. A compaction machine for compaction construction of soft soil foundation according to claim 1, characterized in that: A cross bar is rotatably provided on one side of the top of the machine body (101), a first motor (102) is slidably connected to the outer side of the cross bar of the machine body (101), and the traction steel wire (103) is slidably connected to the front side of the first motor (102).

3. A compaction machine for compaction construction of soft soil foundation according to claim 2, characterized in that: The rammer assembly (3) comprises a rammer body (301), the rammer body (301) is a hollow structure, and a conical bottom block (302) is fixedly connected to the bottom of the rammer body (301).

4. A construction method of a dynamic compaction machine for dynamic compaction construction of soft soil foundation, using a dynamic compaction machine for dynamic compaction construction of soft soil foundation as claimed in any one of claims 2-3, characterized in that: The following steps are involved: S1. On-site investigation, measurement and determination of the boundaries of the tamping area; S2, assemble and debug the dynamic compaction machine, and check whether the cleaning component (4) is operating normally; S3. Select appropriate rammer weight and rammer height according to the geological report; S4, accurately positioning the crane (1) above the first tamping point; S5, starting the crane (1) and the cleaning assembly (4) to cause the rammer assembly (3) to rise to a set height, and then lowering it after confirming that there are no obstacles; S6, observing the landing point of the rammer assembly (3), and recording the ground reaction after each rammering; S7, after completing the single-point tamping, the first motor (102) is moved in sequence to the next tamping point, and after the tamping of the tamping points within the coverage area of ​​the machine body (101) is completed, the crane (1) is moved to the next tamping area; S8, repeat the above steps until the whole area is compacted; S9. Conduct comprehensive inspection and evaluate the effectiveness of foundation reinforcement.

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