Soft soil foundation dynamic consolidation construction device

Abstract

The application belongs to the technical field of soft soil foundation reinforcement and provides a soft soil foundation dynamic compaction construction device, which comprises upper and lower shells connected in sequence from top to bottom, a perforating unit, an aggregate groove and a propellant groove are arranged in the perforating unit, the aggregate groove is arranged above the propellant groove, the aggregate groove and the propellant groove are communicated through a communication hole, and a discharge valve is arranged at the bottom of the communication hole; the device further comprises a rotating shaft and a blade structure, the rotating shaft is rotatably arranged in the aggregate groove, the bottom end of the rotating shaft extends into the propellant groove, and the blade structure is fixedly connected with the bottom end of the rotating shaft. In the device, the impact force generated after the propellant is ignited and exploded can drive the blade structure to rotate, and then drive the rotating shaft to rotate, and the rotation of the rotating shaft can disturb the aggregate in the communication hole and the aggregate groove, so that the aggregate in the aggregate groove can smoothly fall into the propellant groove, and then the aggregate can be quickly filled into the perforation.

Description

Technical Field

[0001] This invention belongs to the field of soft soil foundation reinforcement technology, specifically relating to a dynamic compaction construction device for soft soil foundations. Background Technology

[0002] Soft soil foundations refer to weak soil layers with low strength and high compressibility, often containing a certain amount of organic matter or high water content. Due to their low strength and large settlement, soft soil often poses significant risks to road engineering. Improper handling can severely impact highway construction and use. Existing treatment methods for soft soil foundations vary depending on the specific circumstances; for example, installing drainage boards, using vibratory compaction for pile driving, replacement, or using dynamic compaction to compact the soil. However, drainage boards are prone to clogging and have limited drainage; vibratory compaction and replacement are too time-consuming and affect construction progress; and dynamic compaction, when pushed to a certain extent, can lead to the accumulation of pore water pressure in the soft soil foundation, easily forming rubbery soil and resulting in poor compaction effectiveness. For example, patent CN 112127343 A discloses a dynamic compaction construction device and method for soft soil foundations. In this dynamic compaction construction device for soft soil foundations, the ammunition in the ammunition trough is ignited and explodes, acting laterally on the sidewall of the perforation well and forming a lateral perforation. Then, the aggregate in the aggregate trough above the ammunition trough enters the ammunition trough through the connecting hole, and then enters the perforation using the inclined slope of the ammunition trough.

[0003] However, in the aforementioned device, the connecting hole between the aggregate trough and the ammunition trough is relatively small. With a valve installed at this point, the aggregate in the aggregate trough relies entirely on its own gravity to descend into the ammunition trough. Especially when the valve is first opened, the aggregate is prone to slow descent or blockage. This results in a very slow aggregate descent and filling speed, and the perforation hole is easily blocked by soft soil. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device for dynamic compaction construction of soft soil foundations, which allows aggregate in the aggregate trough to smoothly fill the injection holes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a soft soil foundation dynamic compaction construction device, comprising an upper shell, a perforation unit, and a lower shell connected sequentially from top to bottom. The perforation unit is provided with an aggregate trough and an ammunition trough inside. The aggregate trough is located above the ammunition trough. The aggregate trough and the ammunition trough are connected through a connecting hole. A discharge valve is provided at the bottom of the connecting hole.

[0006] It also includes a rotating shaft and a blade structure for withstanding the explosive impact and rotating. The rotating shaft is rotatably disposed in the aggregate trough. The bottom end of the rotating shaft passes through the connecting hole and the discharge valve in sequence and extends into the ammunition trough. The blade structure is fixedly connected to the bottom end of the rotating shaft.

[0007] Preferably, the aggregate trough has a columnar structure.

[0008] Preferably, the inner wall of the aggregate trough is provided with an annular groove, and an annular support is rotatably provided in the annular groove. The annular support is fixedly connected to the rotating shaft, and the rotating shaft is coaxial with the aggregate trough.

[0009] Preferably, the perforation unit has an aggregate tank trough inside, an aggregate tank is placed inside the aggregate tank trough, the aggregate tank trough is set inside the aggregate tank, a gap is left between the top of the aggregate tank and the top of the aggregate tank trough, and the bottom of the aggregate tank trough is connected to the ammunition tank through a perforation.

[0010] Preferably, the perforation is an annular perforation.

[0011] Preferably, the perforation and the connecting hole are coaxially arranged.

[0012] Preferably, the discharge valve includes a main valve plate and a secondary valve plate, which cover the bottom of the connecting hole. One end of the main valve plate is hinged to the top of the ammunition slot via a first hinge, and one end of the secondary valve plate is hinged to the top of the ammunition slot via a second hinge. The first and second hinges are located on opposite sides of the connecting hole. The other end of the secondary valve plate overlaps the other end of the main valve plate. An embedded groove is provided on the side of the main valve plate near the secondary valve plate. The bottom end of the rotating shaft extends downward through the groove. One end of the blade structure is fixedly connected to the bottom end of the rotating shaft, and the other end of the blade structure extends below the main valve plate. The main valve plate abuts against the blade structure, and the width of the blade structure is less than or equal to the diameter of the rotating shaft.

[0013] Preferably, the auxiliary valve plate is provided with a tongue plate, which is embedded in the groove to form a shaft clearance hole. The inner diameter of the shaft clearance hole is equal to the diameter of the shaft, and the bottom end of the shaft extends downward through the shaft clearance hole.

[0014] Preferably, the auxiliary valve plate has a pressure tongue on one edge near the main valve plate, and the main valve plate has a pressure groove that matches the pressure tongue, with the pressure tongue overlapping in the pressure groove.

[0015] Preferably, the ammunition slot has a square cross-section.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention provides a dynamic compaction construction device for soft soil foundations. When the ammunition in the ammunition trough is ignited and explodes, the resulting impact force can drive the blade structure to rotate, which in turn drives the rotating shaft to rotate. The rotation of the shaft can disturb the aggregate in the connecting hole and the aggregate trough, preventing the aggregate from getting stuck. This allows the aggregate in the aggregate trough to fall smoothly into the ammunition trough, thereby enabling the aggregate to quickly fill the perforation hole. This ensures that the perforation hole is fully filled with aggregate, providing favorable conditions for subsequent perforation drainage and compaction of the soft soil foundation. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of a dynamic compaction construction device for soft soil foundation provided in an embodiment of the present invention;

[0019] Figure 2 A cross-sectional structural diagram of a perforation unit of a dynamic compaction construction device for soft soil foundation provided in an embodiment of the present invention;

[0020] Figure 3 for Figure 2 Enlarged view of point C in the middle;

[0021] Figure 4 A bottom view of the discharge valve of a dynamic compaction device for soft soil foundation provided in an embodiment of the present invention;

[0022] Figure 5 for Figure 3 Schematic diagram of the local structure in direction A;

[0023] Figure 6 for Figure 3 Schematic diagram of the local structure in the B direction;

[0024] Figure 7 A front view structural diagram of the discharge valve and related parts of a dynamic compaction device for soft soil foundation provided in an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the relevant parts of a dynamic compaction construction device for soft soil foundation after the rotating shaft is rotated 180°, as provided in an embodiment of the present invention.

[0026] Figure 9 This is a schematic diagram of the relevant structural parts of a dynamic compaction device for soft soil foundation that opens after the rotating shaft rotates 180°, as provided in an embodiment of the present invention.

[0027] Figure 10 A schematic diagram of the relevant parts of a dynamic compaction device for soft soil foundation after the rotating shaft has been rotated 360°, as provided in an embodiment of the present invention.

[0028] Figure 11A schematic diagram of the relevant parts of the auxiliary valve plate opening after the rotating shaft of a dynamic compaction device for soft soil foundation is rotated 360°, as provided in an embodiment of the present invention.

[0029] Figure 12 A top view of the discharge valve of a soft soil foundation dynamic compaction construction device after the rotating shaft is rotated 180°, as provided in an embodiment of the present invention.

[0030] Figure 13 A top view of the aggregate trough of a dynamic compaction device for soft soil foundation provided in an embodiment of the present invention;

[0031] Figure 14 A top view of the support structure of a dynamic compaction construction device for soft soil foundation provided in an embodiment of the present invention;

[0032] Figure 15 A top view of the ammunition trough and related parts of a dynamic compaction device for soft soil foundation provided in an embodiment of the present invention;

[0033] Figure 16 This is a top view of the ammunition trough of a dynamic compaction device for soft soil foundation provided in an embodiment of the present invention.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 10. Upper shell;

[0036] 20. Perforation unit; 201. Aggregate trough; 202. Ammunition trough; 203. Connecting hole; 204. Aggregate tank trough; 205. Gap; 206. Perforation;

[0037] 21. Shaft; 22. Blade structure; 23. Support; 24. Aggregate tank; 251. Main valve plate; 252. Secondary valve plate; 253. Shaft clearance hole; 254. Tongue plate; 255. Groove; 256. Pressing tongue; 257. Pressing groove;

[0038] 30. Lower shell. Implementation

[0039] The present invention will now be described in further detail with reference to specific embodiments, so that those skilled in the art can more clearly understand the present invention.

[0040] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrally formed structures. Those skilled in the art can understand the specific meaning of these terms in this patent based on the specific circumstances.

[0041] like Figure 1-16 As shown, this embodiment provides a dynamic compaction construction device for soft soil foundation, including an upper shell 10, a perforation unit 20, and a lower shell 30 connected sequentially from top to bottom. The perforation unit 20 is provided with an aggregate trough 201 and an ammunition trough 202 inside. The aggregate trough 201 is located above the ammunition trough 202. The aggregate trough 201 and the ammunition trough 202 are connected through a connecting hole 203. A discharge valve is provided at the bottom of the connecting hole 203.

[0042] It also includes a rotating shaft 21 and a blade structure 22 for bearing the explosive impact force and rotating. The rotating shaft 21 is rotatably disposed in the aggregate trough 201. The bottom end of the rotating shaft 21 passes through the connecting hole 203 and the discharge valve in sequence and extends into the ammunition trough 202. The blade structure 22 is fixedly connected to the bottom end of the rotating shaft 21.

[0043] In this embodiment, the upper housing 10 can have the following structure: its upper part is connected to a connector for hoisting, it is hollow inside, and an igniter assembly is provided. The lower part of the igniter assembly is provided with an insulating layer. The bottom surface of the upper housing 10 is embedded with a main igniter series connector, which is electrically connected to the igniter assembly. The lower edge of the upper housing 10 is an inverted stepped shape, and the outer edge of the bottom stepped structure is provided with multiple screw holes evenly spaced around its circumference.

[0044] The perforation unit 20 can have the following structure: its top surface is recessed inward to form a splicing groove, which is adapted to the lower part of the upper housing 10. The side wall of the splicing groove is provided with a connecting hole, which corresponds to the screw hole of the upper housing 10, so that the perforation unit 20 and the lower part of the upper housing 10 are detachably connected by screws. The bottom surface of the splicing groove is embedded with a secondary igniter series connector, which is electrically connected to the main igniter series connector.

[0045] The perforation unit 20 can be provided in two forms, such as... Figure 1 As shown, two perforation units 20 are connected in series, one above the other, according to construction requirements. The lower bottom surface of the perforation unit 20 has the same structure as the lower bottom surface of the upper housing 10, and is fitted with a main igniter connector. The lower part of the perforation unit 20 is an inverted stepped shape, and its outer edge is provided with multiple screw holes evenly spaced circumferentially. The connection method of two adjacent perforation units 20 is the same as the connection method between the uppermost perforation unit 20 and the bottom of the upper housing 10. The discharge valve can be an electrically operated discharge valve. During the explosion, the discharge valve is opened electrically, allowing the aggregate in the aggregate trough 201 to fall smoothly.

[0046] The lower housing 30 can have the following structure: it is an inverted frustum-shaped structure with its top recessed inward to form a splicing groove, which matches the bottom of the lowermost perforation unit 20. The sidewall of the splicing groove has a through hole, which corresponds to a screw hole on the perforation unit 20, allowing the bottom of the lowermost perforation unit 20 and the upper part of the lower housing 30 to be detachably connected by screws.

[0047] In actual operation, workers use equipment to drill perforation wells in the area to be compacted. The soft soil foundation dynamic compaction construction device provided in this embodiment of the invention is vertically inserted into the perforation well, and the ammunition in the ammunition tank 202 is ignited. The ammunition explodes and acts laterally on the inner wall of the perforation well, thus creating perforations on the inner wall of the perforation well.

[0048] By setting the explosion point at a suitable location, the impact force generated by the explosion acts on the blade structure 22, causing the end of the blade structure 22 away from the rotating shaft 21 to experience a thrust in one direction. This causes the blade structure 22 to swing clockwise or counterclockwise around the rotating shaft 21, driving the rotating shaft 21 to rotate synchronously. On one hand, the swinging of the blade structure 22 itself can throw out the aggregate falling into the ammunition trough 202, allowing the aggregate to quickly fill the perforation hole and race against time before soft soil blocks the perforation hole. On the other hand, the rotating shaft 21 can disturb the aggregate in the aggregate trough 201 and the connecting hole 203, preventing aggregate blockage and allowing the aggregate to fall smoothly into the ammunition trough 202. This allows the aggregate to quickly fill the perforation hole, ensuring sufficient aggregate filling and providing favorable conditions for subsequent perforation drainage and soft soil foundation compaction.

[0049] In this embodiment, the rotating shaft 21 can be a short shaft located at the bottom of the aggregate trough 201. The short shaft is not easy to bend and is more stable when rotating.

[0050] The blade structure 22 can be a part similar to a fan blade, which can rotate under the force of an explosion.

[0051] The perforation unit 20 may be provided with four aggregate troughs 201, such as Figure 13-16 As shown, the four aggregate troughs 201 are evenly spaced circumferentially. Correspondingly, the perforation unit 20 is provided with four ammunition troughs 202, four perforations 206, and four sets of discharge valves.

[0052] In this embodiment, the aggregate trough 201 can be a columnar structure. The inner sidewall of the aggregate trough 201 is provided with an annular groove, and an annular support 23 is rotatably provided in the annular groove. The annular support 23 is fixedly connected to the rotating shaft 21, and the rotating shaft 21 is coaxially arranged with the aggregate trough 201.

[0053] With this configuration, when the rotating shaft 21 rotates, it can drive the annular support 23 to rotate synchronously. The rotation of both the annular support 23 and the rotating shaft 21 can disturb the aggregate in the aggregate trough 201, thus preventing blockage or jamming in the initial stage of aggregate falling.

[0054] In some embodiments, the annular support 23 may be fixedly disposed within the aggregate trough 201, with a retaining ring in the middle of the annular support 23, and the rotating shaft 21 rotatably inserted into the retaining ring. This arrangement ensures that the annular support 23 does not rotate when the rotating shaft 21 rotates, making the rotation of the rotating shaft 21 more stable.

[0055] In some embodiments, the aggregate trough 201 may be provided with a plurality of annular supports. Among the plurality of annular supports, some may be rotatably disposed in the annular groove and some may be fixedly disposed in the aggregate trough 201. When the rotating shaft 21 rotates, the annular supports rotatably disposed in the annular groove may rotate accordingly, while the annular supports fixedly disposed in the aggregate trough 201 may not rotate accordingly.

[0056] like Figure 2-3 As shown, in this embodiment, the perforation unit 20 is provided with an aggregate tank 204 inside, and an aggregate tank 24 is placed inside the aggregate tank 204. The aggregate trough 201 is disposed inside the aggregate tank 24. A gap 205 is left between the top of the aggregate tank 24 and the top of the aggregate tank 204. The bottom of the aggregate tank 204 is connected to the ammunition tank 202 through a perforation 206.

[0057] With this configuration, when the ammunition in the ammunition slot 202 explodes, the impact force generated by the explosion acts upwards through the perforation 206 onto the bottom of the aggregate container 24, causing the aggregate container 24 to vibrate. The amplitude of the vertical vibration of the aggregate container 24 depends on the power of the explosion and its own weight. It may be difficult to make the aggregate container 24 vibrate significantly, but slight vibration can loosen the aggregate inside the aggregate container 24, preventing the aggregate from getting stuck and clogging.

[0058] The perforation 206 is an annular perforation. The perforation 206 is coaxially arranged with the connecting hole 203. In this way, the impact force generated by the explosion can preferentially loosen the aggregate near the connecting hole 203, allowing the aggregate to quickly enter the connecting hole 203.

[0059] In this embodiment, as Figure 2-6As shown, the discharge valve includes a main valve plate 251 and a secondary valve plate 252. The main valve plate 251 and the secondary valve plate 252 cover the bottom of the connecting hole 203. One end of the main valve plate 251 is hinged to the top of the ammunition slot 202 via a first hinge, and one end of the secondary valve plate 252 is hinged to the top of the ammunition slot 202 via a second hinge. The first hinge and the second hinge are located on both sides of the connecting hole 203, and the other end of the secondary valve plate 252 overlaps the bottom of the connecting hole 203. On the other end of the main valve plate 251, an embedded groove 255 is provided on the side of the main valve plate 251 near the auxiliary valve plate 252. The bottom end of the rotating shaft 21 extends downward through the groove 255. One end of the blade structure 22 is fixedly connected to the bottom end of the rotating shaft 21, and the other end of the blade structure 22 extends to the bottom of the main valve plate 251. The main valve plate 251 presses against the blade structure 22. The width of the blade structure 22 is less than or equal to the diameter of the rotating shaft 21.

[0060] Both the main valve plate 251 and the auxiliary valve plate 252 can swing downwards due to gravity, but the auxiliary valve plate 252 rests on the main valve plate 251, while the main valve plate 251 presses against the blade structure 22, thus keeping both the main valve plate 251 and the auxiliary valve plate 252 stable. When the blade structure 22 is subjected to the impact force of an explosion, it can rotate around the pivot 21. For example, such as... Figure 7 As shown, the blade structure 22 is initially located below the main valve plate 251. When the blade structure 22 swings to below the secondary valve plate 252, as... Figure 8-9 As shown in Figure 12, the blade structure 22 detaches from the main valve plate 251, allowing the main valve plate 251 to swing freely downwards, while the secondary valve plate 252 presses against the blade structure 22 and cannot swing downwards. The blade structure 22 continues to swing until it leaves the secondary valve plate 252, as... Figure 10-11 As shown, at this time, the secondary valve plate 252 can also swing down freely. Due to gravity, both the main valve plate 251 and the secondary valve plate 252 can swing down to a vertical state, that is, the discharge valve is fully open, and the aggregate in the aggregate trough 201 can smoothly enter the ammunition trough 202.

[0061] The blade structure 22, after being subjected to the impact force of an explosion, can swing rapidly; however, during this swinging process, it may collide with the downward-swinging main valve plate 251 or the auxiliary valve plate 252. For example, such as... Figure 9As shown, when the blade structure 22 continues to swing to the right, it may collide with the main valve plate 251 in the downward swing. However, due to the large impact force of the blade structure 22, the impact can accelerate the downward swing speed of the main valve plate 251, causing the discharge valve to open quickly, thereby accelerating the speed at which the aggregate enters the ammunition trough 202.

[0062] In this embodiment, as Figure 4-6 As shown, the auxiliary valve plate 252 is provided with a tongue plate 254, which is embedded in the groove 255 to form a shaft clearance hole 253. The inner diameter of the shaft clearance hole 253 is equal to the diameter of the shaft 21, and the bottom end of the shaft 21 extends downward through the shaft clearance hole 253.

[0063] For example, such as Figure 4 As shown, when the secondary valve plate 252 overlaps the main valve plate 251, the secondary valve plate 252 is parallel to the main valve plate 251. The tongue plate 254 can be embedded in the groove 255, and the side of the tongue plate 254 facing the groove 255 has a crescent-shaped groove structure. The bottom of the groove 255 has a semi-circular structure, so that the tongue plate 254 and the groove 255 together form a shaft clearance hole 253. The shaft 21 passes through the shaft clearance hole 253, and the inner diameter of the shaft clearance hole 253 is equal to the diameter of the shaft 21, so that there is no gap between the shaft 21 and the discharge valve, which can prevent the aggregate from flowing down through the gap.

[0064] In this embodiment, as Figure 6 As shown, the auxiliary valve plate 252 has a pressure tongue 256 on one edge near the main valve plate 251, and the main valve plate 251 has a pressure groove 257 adapted to the pressure tongue 256, with the pressure tongue 256 overlapping in the pressure groove 257.

[0065] The secondary valve plate 252 is attached to the main valve plate 251 by the pressure tongue 256, so that the secondary valve plate 252 can remain stable.

[0066] Finally, in this embodiment, the cross-section of the ammunition slot 202 is square. This ensures that the main valve plate 251 and the secondary valve plate 252 can be in a vertical position after being opened, with the main valve plate 251 located on one side of the ammunition slot 202 and the secondary valve plate 252 located on the other side of the ammunition slot 202.

[0067] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "left," "right," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the present invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "multiple" means two or more.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dynamic compaction construction device for soft soil foundation, comprising an upper shell (10), a perforation unit (20), and a lower shell (30) connected sequentially from top to bottom, wherein the perforation unit (20) is provided with an aggregate trough (201) and an ammunition trough (202) inside, the aggregate trough (201) is disposed above the ammunition trough (202), the aggregate trough (201) and the ammunition trough (202) are connected through a connecting hole (203), and a discharge valve is provided at the bottom of the connecting hole (203), characterized in that: It also includes a rotating shaft (21) and a blade structure (22) for bearing the explosive impact force. The rotating shaft (21) is rotatably disposed in the aggregate trough (201). The bottom end of the rotating shaft (21) passes through the connecting hole (203) and the discharge valve in sequence and extends into the ammunition trough (202). The blade structure (22) is fixedly connected to the bottom end of the rotating shaft (21).

2. The soft soil foundation dynamic compaction construction device according to claim 1, characterized in that, The aggregate trough (201) has a columnar structure.

3. The soft soil foundation dynamic compaction construction device according to claim 2, characterized in that, The inner wall of the aggregate trough (201) is provided with an annular groove, and an annular support (23) is rotatably provided in the annular groove. The annular support (23) is fixedly connected to the rotating shaft (21), and the rotating shaft (21) is coaxially arranged with the aggregate trough (201).

4. The soft soil foundation dynamic compaction construction device according to claim 1, characterized in that, The perforation unit (20) is provided with an aggregate tank trough (204) inside, and an aggregate tank (24) is placed inside the aggregate tank trough (204). The aggregate trough (201) is set inside the aggregate tank (24). A gap (205) is left between the top of the aggregate tank (24) and the top of the aggregate tank trough (204). The bottom of the aggregate tank trough (204) is connected to the ammunition trough (202) through a perforation (206).

5. The soft soil foundation dynamic compaction construction device according to claim 4, characterized in that, The perforation (206) is an annular perforation.

6. The soft soil foundation dynamic compaction construction device according to claim 5, characterized in that, The perforation (206) and the connecting hole (203) are coaxially arranged.

7. The soft soil foundation dynamic compaction construction device according to claim 1, characterized in that, The discharge valve includes a main valve plate (251) and a secondary valve plate (252). The main valve plate (251) and the secondary valve plate (252) cover the bottom of the connecting hole (203). One end of the main valve plate (251) is hinged to the top of the ammunition slot (202) via a first hinge, and one end of the secondary valve plate (252) is hinged to the top of the ammunition slot (202) via a second hinge. The first hinge and the second hinge are located on both sides of the connecting hole (203). The other end of the secondary valve plate (252) overlaps the main valve plate. On the other end of the plate (251), the main valve plate (251) is provided with an embedded groove (255) on the side near the auxiliary valve plate (252). The bottom end of the rotating shaft (21) extends through the groove (255) to the bottom. One end of the blade structure (22) is fixedly connected to the bottom end of the rotating shaft (21). The other end of the blade structure (22) extends to the bottom of the main valve plate (251). The main valve plate (251) presses against the blade structure (22). The width of the blade structure (22) is less than or equal to the diameter of the rotating shaft (21).

8. A dynamic compaction construction device for soft soil foundation according to claim 7, characterized in that, The auxiliary valve plate (252) is provided with a tongue plate (254), which is embedded in the groove (255) and together with the groove (255) forms a shaft clearance hole (253). The inner diameter of the shaft clearance hole (253) is equal to the diameter of the shaft (21), and the bottom end of the shaft (21) extends downward through the shaft clearance hole (253).

9. A dynamic compaction construction device for soft soil foundation according to claim 7, characterized in that, The auxiliary valve plate (252) is provided with a pressure tongue (256) on one side edge near the main valve plate (251), and the main valve plate (251) is provided with a pressure groove (257) adapted to the pressure tongue (256), and the pressure tongue (256) overlaps in the pressure groove (257).

10. A dynamic compaction construction device for soft soil foundation according to claim 1, characterized in that, The ammunition slot (202) has a square cross-section.

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