A dynamic compaction hammer for dynamic compaction construction of soft soil foundation and a method for dynamic compaction construction of soft soil foundation

Abstract

The present invention discloses a dynamic compaction hammer for soft soil foundation dynamic compaction construction and a soft soil foundation dynamic compaction construction method, including a hammer body and a pull rod slidably arranged on the hammer body. A plurality of through holes are formed in the hammer body, a sleeve is rotatably arranged in the through holes, and a connecting belt is wound around the sleeve; the connecting belt is clamped with the sleeve through a connecting component, and a winding component matched with the connecting belt is arranged on the hammer body; through the cooperation of the arranged connecting belt with the connecting component and the winding component, during the process of lifting the hammer, the connecting belt is led out from the inner wall of the sleeve and between the sleeve and the through hole. On the one hand, the soil in the sleeve loses the basis for adhesion. After the hammer body is lifted, the soil in the sleeve can fall out of the sleeve, so as to facilitate the next use. And when the connecting belt is led out from the diversion channel, external gas can enter between the hammer body and the ground through the above-mentioned diversion channel, which is beneficial to avoiding the problem that the hammer body is adsorbed on the ground and difficult to lift the hammer.

Description

Technical Field

[0001] The present invention relates to the technical field of construction tools, and particularly to a dynamic compaction hammer for dynamic compaction construction of soft soil foundations and a dynamic compaction construction method for soft soil foundations. Background Technique

[0002] Industry is the foundation of national development. The development of industry has promoted the progress of industrial production and the development of cities. With the continuous progress of society, the country has paid more and more attention to environmental protection. The original steel enterprises have gradually withdrawn from the city and relocated, and more and more heavy industrial plants have been built from the ground up. And the dynamic compaction method is a relatively common foundation treatment method.

[0003] Chinese Patent CN218479139U discloses a dynamic compaction hammer, which is arranged in the exhaust hole of the dynamic compaction hammer and includes a bearing beam, a transmission rod, a soil retaining and exhaust device and a compression spring. The bearing beam is a circular plate-like structure arranged in the exhaust hole, and a perforation for the transmission rod to pass through is arranged in the middle. A retaining member is arranged at the end of the transmission rod passing through the perforation. The soil retaining and exhaust device is arranged at the end of the transmission rod extending out of the exhaust hole. The soil retaining and exhaust device includes a soil retaining steel plate and an exhaust cylinder arranged on the soil retaining steel plate. The exhaust cylinder is provided with air outlet holes. The transmission rod passes through the exhaust cylinder and is fixed to the soil retaining steel plate. The upper and lower parts of the compression spring are respectively abutted against the bearing beam and the soil retaining steel plate. The upper part of the exhaust cylinder is inserted into the exhaust hole. This scheme does not require cleaning the exhaust hole, can prevent the soil from blocking the exhaust hole during ramming, saves the time for cleaning the exhaust hole, is not easy to suck the hammer, greatly improves the work efficiency and shortens the construction period.

[0004] The above device seals the exhaust hole through the arranged soil retaining steel plate, so as to prevent the soil from entering the exhaust hole during the process of ramming the foundation. However, when the dynamic compaction hammer falls to the ground, the soil retaining steel plate will be in close contact with the bottom of the hammer body. At this time, it is difficult for the external gas to enter between the hammer body and the ground through the exhaust hole, thus affecting the later lifting of the hammer. Therefore, the above device still has deficiencies.

[0005] Therefore, it is necessary to provide a dynamic compaction hammer for dynamic compaction construction of soft soil foundations and a dynamic compaction construction method for soft soil foundations to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a dynamic compaction hammer for dynamic compaction construction of soft soil foundations and a dynamic compaction construction method for soft soil foundations to solve the problem that the existing device seals the exhaust hole through the arranged soil retaining steel plate, so as to prevent the soil from entering the exhaust hole during the process of ramming the foundation. However, when the dynamic compaction hammer falls to the ground, the soil retaining steel plate will be in close contact with the bottom of the hammer body. At this time, it is difficult for the external gas to enter between the hammer body and the ground through the exhaust hole, thus affecting the later lifting of the hammer as mentioned in the above background technique.

[0007] Based on the above idea, the present invention provides the following technical solution: It includes a hammer body and a pull rod slidably arranged on the hammer body. A plurality of through holes are opened in the hammer body, a sleeve is rotatably arranged in the through holes, and a connecting belt is wound around the sleeve.

[0008] The connecting belt is clamped with the sleeve through a connecting component, and a winding component matched with the connecting belt is arranged on the hammer body. When the pull rod moves upward relative to the hammer body, the winding component rotates and winds the connecting belt, so that the connecting belt is led out from the sleeve, and a diversion channel is formed between the sleeve and the inner wall of the through hole.

[0009] As a further scheme of the present invention: The connecting belt includes a winding section wound inside the sleeve and a wrapping section wound outside the sleeve. The winding section is attached to the inner wall of the sleeve, and the wrapping section is arranged between the sleeve and the inner wall of the through hole and is in contact with the outer peripheral wall of the sleeve and the inner wall of the through hole.

[0010] As a further scheme of the present invention: The connecting component includes a plurality of card strips fixedly connected to the outside of the connecting belt. The card strips are arranged at the winding section. Card slots slidably matched with the card strips are opened on the inner wall of the sleeve. One end of the connecting belt at the winding section is fixedly connected with a stop strip. A protrusion is formed by the inner wall of the sleeve protruding outward. The stop strip is arranged on one side of the protrusion. The winding section on the connecting belt extends along the inner wall of the sleeve from the stop strip to the other side of the protrusion, then passes through the sleeve and enters between the sleeve and the through hole. A columnar installation hole is opened in the pipe wall of the sleeve. A rotating shaft is rotatably arranged in the installation hole. A pull rope is fixed to the outside of the rotating shaft. One end of the pull rope is wound around the rotating shaft, and the other end of the pull rope extends to the card strip and is fixedly connected with the card strip. Bushings are sleeved at both ends of the rotating shaft, and the bushings are fixedly arranged in the installation hole. A first coil spring is sleeved on a section of the rotating shaft placed in the bushing, and both ends of the first coil spring are connected with the rotating shaft and the bushing respectively.

[0011] As a further scheme of the present invention: The winding component includes a reel rotatably matched with the hammer body. A storage hole is opened on the bottom surface of the hammer body. The reel is arranged at the center of the storage hole. The top end of the reel passes through the hammer body and is rotatably connected with it. The wrapping section on the connecting belt extends to the installation hole and is fixedly connected with the reel. A limiting frame is sleeved on the outer top end of the reel. The limiting frame is prismatic and a central hole matched with the reel is opened at its center. A spiral limiting groove is opened on the outer wall of the reel. A limiting block slidably matched with the limiting groove is fixedly connected to the inner wall of the central hole. A bracket is fixedly connected to the top of the limiting frame. A traction rope is arranged between the bracket and the pull rod.

[0012] As a further solution of the present invention: an annular plate is sleeved outside the casing, and the annular plate is connected to the casing through a connecting rod. A sleeve is arranged outside the annular plate, and the sleeve is fixedly connected to the hammer body. The annular plate and the sleeve are rotationally matched. A second coil spring is sleeved outside the annular plate, and two ends of the second coil spring are respectively connected to the annular plate and the sleeve.

[0013] As a further solution of the present invention: an annular groove is formed on the inner wall of the casing, and the winding section of the connecting belt is located in the groove.

[0014] As a further solution of the present invention: the bottom end of the wrapping section is flush with the bottom surface of the hammer body.

[0015] As a further solution of the present invention: a plurality of outwardly extending convex blocks are arranged at the bottom of the hammer body.

[0016] As a further solution of the present invention: a connecting hole is formed at the center of the hammer body, the cross-section of the connecting hole is T-shaped, a snap ring is fixedly sleeved outside the pull rod, the snap ring is slidably arranged in the connecting hole, and a support spring is sleeved outside the pull rod. Two ends of the support spring are respectively fixed to the snap ring and the end face of the connecting hole.

[0017] A method for dynamic compaction of soft soil foundation using the dynamic compaction hammer for soft soil foundation compaction as described above, comprising the following steps:

[0018] S1. Drive the hammer body to move upward through the pull rod. The pull rod drives the reel to rotate through the traction rope, so as to wind the connecting belt, so that the connecting belt is led out from the casing and the through hole, and external air can enter between the hammer body and the bottom surface through the diversion channel;

[0019] S2. Release the hammer body, and the pull rod moves downward relative to the hammer body. During this process, the traction rope is loosened and the reel rotates reversely to reset, so that the connecting belt re-enters the casing and the through hole, avoiding soil from entering the diversion channel during the process of compacting the foundation.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: This device is matched with the connecting belt, the connecting component and the winding component. During the process of lifting the hammer, the connecting belt is led out from the inner wall of the casing and between the casing and the through hole. On the one hand, the soil in the casing loses the basis for adhesion. After the hammer body is lifted, the soil in the casing can fall out of the casing, so as to facilitate the next use. And when the connecting belt is led out from the diversion channel, external gas can enter between the hammer body and the ground through the above-mentioned diversion channel, which is beneficial to avoiding the problem that the hammer body is adsorbed on the ground and difficult to lift. Description of the Drawings

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic diagram of the pull rod structure of the present invention;

[0024] Figure 3 is a three-dimensional structure schematic diagram of the present invention

[0025] Figure 4 is a schematic diagram of the sleeve structure of the present invention;

[0026] Figure 5 is a schematic diagram of the connecting belt structure of the present invention;

[0027] Figure 6 is a schematic diagram of the positions of the connecting belt, sleeve and reel of the present invention;

[0028] Figure 7 is a schematic diagram of the rotating shaft and pull rope structure of the present invention;

[0029] Figure 8 is a schematic diagram of the card strip structure of the present invention;

[0030] Figure 9 is the present invention Figure 1 an enlarged structure schematic diagram at position A;

[0031] Figure 10 is the present invention Figure 2 an enlarged structure schematic diagram at position B;

[0032] Figure 11 is a schematic diagram of the pull rope structure of the present invention;

[0033] Figure 12 is a schematic diagram of the first spiral spring structure of the present invention.

[0034] In the figure: 1. Hammer body; 2. Traction rope; 3. Pull rod; 4. Sleeve; 5. Annular plate; 6. Sleeve; 7. Limit frame; 8. Fixed frame; 9. Support spring; 10. Snap ring; 11. Connecting belt; 1101. Winding section; 1102. Wrapping section; 12. Reel; 13. Stop bar; 14. Through hole; 15. Sealing block; 16. Card strip; 17. Protrusion; 18. Storage hole; 19. Card slot; 20. Pull rope; 21. Bushing; 22. First spring; 23. Limit block; 24. Limit groove; 25. First spiral spring; 26. Second spiral spring; 27. Connecting rod; 28. Notch; 29. Rotating shaft; 30. Stop block; 31. Flow guide channel. Detailed implementation manners

[0035] As Figures 1 - 3As shown in the figure, a dynamic compaction hammer for dynamic compaction construction of soft soil foundation and a method for dynamic compaction construction of soft soil foundation include a hammer body 1 and a pull rod 3 arranged on the hammer body 1. The pull rod 3 is slidably matched with the hammer body 1, and a plurality of through holes 14 are formed in the hammer body 1 to facilitate the lifting of the hammer in the later stage.

[0036] Specifically, a connection hole is formed at the center of the hammer body 1. The cross-section of the connection hole is set to be T-shaped. A snap ring 10 is fixedly sleeved on the outer side of the pull rod 3. The snap ring 10 is slidably arranged in the connection hole, and a support spring 9 is sleeved on the outer side of the pull rod 3. Both ends of the support spring 9 are fixed to the snap ring 10 and the end face of the connection hole respectively. During use, the pull rod 3 can be connected to an external equipment lifting device by electromagnetic adsorption or lifted by means of a rope connection. When the hammer body 1 is lifted to a certain height and then the hammer body 1 is released, the hammer body 1 falls freely, thereby compacting the foundation at the construction site.

[0037] However, in the actual use process, when the soil of the foundation is relatively wet and dense, during the process of the hammer body 1 compacting the foundation, some soil will be squeezed into the through holes 14, thus blocking the through holes 14. This makes it difficult for external air to enter between the hammer body 1 and the ground, resulting in difficult hammer lifting. Therefore, in this solution, a sleeve 4 is rotatably arranged in the through hole 14, and a connecting belt 11 is wound around the sleeve 4. The connecting belt 11 is clamped with the sleeve 4 through a connecting component, and a winding component cooperating with the connecting belt 11 is arranged on the hammer body 1. During the actual application process, when the pull rod 3 moves upward relative to the hammer body 1, the winding component rotates and winds the connecting belt 11, so that the connecting belt 11 is loosened from the outer side of the sleeve 4. At this time, the connecting belt 11 located inside the sleeve 6 and the connecting belt 11 located between the inner wall of the through hole 14 and the sleeve 4 are both led out. At this time, a diversion channel 31 is formed between the sleeve 4 and the inner wall of the through hole 14, facilitating the flow of external air between the hammer body 1 and the ground. And when the connecting belt 11 is led out from the sleeve 4, the soil originally connected to the connecting belt 11 will fall out of the sleeve 4, thus avoiding the soil being squeezed inside the sleeve 4.

[0038] As Figure 2 、 Figures 4 - 8 、 Figures 10 - 12 shown, the above-mentioned connecting belt 11 includes a winding section 1101 wound inside the sleeve 4 and a wrapping section 1102 wound around the outer side of the sleeve 4. Specifically, the winding section 1101 is attached to the inner wall of the sleeve 4, and the wrapping section 1102 is arranged between the sleeve 4 and the inner wall of the through hole 14 and is in contact with the outer peripheral wall of the sleeve 4 and the inner wall of the through hole 14, thereby sealing the space between the sleeve 4 and the through hole 14.

[0039] The above-mentioned connection component includes a plurality of clamping strips 16 fixedly connected to the outer side of the connection belt 11. The clamping strips 16 are arranged at the winding section 1101. A clamping groove 19 matching with the clamping strips 16 is formed on the inner wall of the sleeve 4, so that the clamping strips 16 are slidably arranged inside the clamping groove 19. Specifically, one end of the connection belt 11 at the winding section 1101 is fixedly connected with a stop strip 13. The outer side of the stop strip 13 is flush with the outer side of the winding section 1101. One end of the above-mentioned clamping strip 16 extends to the stop strip 13 and is flush with the end face of the stop strip 13. A protrusion 17 protrudes outward from the inner wall of the sleeve 4. During actual use, the stop strip 13 is arranged on one side of the protrusion 17, and the winding section 1101 on the connection belt 11 extends along the inner wall of the sleeve 4 starting from the stop strip 13 to the other side of the protrusion 17, then passes through the sleeve 4 and enters between the sleeve 4 and the through hole 14. Of course, a through groove is formed on the pipe wall of the sleeve 4 to facilitate the winding section 1101 to pass through the sleeve 4.

[0040] Further, the above-mentioned clamping groove 19 is not a complete ring. It starts from one side of the protrusion 17 and ends at the other side of the protrusion 17.

[0041] During actual use, in order to drive the winding section 1101 on the connection belt 11 to reset, a columnar installation hole is formed in the pipe wall of the sleeve 4. A rotating shaft 29 is rotatably arranged in the installation hole. A pull rope 20 is fixed to the outer side of the rotating shaft 29. Specifically, one end of the pull rope 20 is wound around the rotating shaft 29, and the other end of the pull rope 20 extends to the clamping strip 16 and is fixedly connected with the clamping strip 16, and the pull rope 20 is slidably matched with the sleeve 4;

[0042] In order to drive the rotating shaft 29 to reset, shaft sleeves 21 are sleeved on both ends of the rotating shaft 29. The shaft sleeves 21 are fixedly arranged in the installation hole, and a first coil spring 25 is sleeved on a section of the rotating shaft 29 placed inside the shaft sleeve 21. Both ends of the first coil spring 25 are connected to the outer side wall of the rotating shaft 29 and the inner wall of the shaft sleeve 21 respectively to drive the rotating shaft 29 to reset.

[0043] The above-mentioned winding component includes a winding shaft 12 rotatably matched with the hammer body 1. Specifically, a storage hole 18 is formed on the bottom surface of the hammer body 1, and the winding shaft 12 is arranged at the center of the storage hole 18. The top end of the winding shaft 12 passes through the hammer body 1 and is rotatably connected with it. The wrapping section 1102 on the connection belt 11 extends to the installation hole and is fixedly connected with the winding shaft 12, and the above-mentioned wrapping section 1102 is slidably matched with the hammer body 1.

[0044] Further, a limiting frame 7 is sleeved on the outer top end of the reel 12. The limiting frame 7 is prismatic and a central hole matching the reel 12 is opened at its center. A spiral limiting groove 24 is opened on the outer wall of the reel 12, and a limiting block 23 slidably matched with the limiting groove 24 is fixedly connected to the inner wall of the central hole. When the limiting block 23 slides in the limiting groove 24, the reel 12 can be driven to rotate, thereby winding or unwinding the connecting belt 11.

[0045] Further, a bracket is fixedly connected to the top of the limiting frame 7, and a traction rope 2 is arranged between the bracket and the pull rod 3. Specifically, a loop can be arranged at one end of the traction rope 2 and fixedly connected to the bracket through the loop, and the other end of the traction rope 2 is fixedly connected to the pull rod 3.

[0046] During actual use, in order to drive the sleeve 4 to reset, an annular plate 5 is sleeved on the outer side of the sleeve 4, and the annular plate 5 is connected to the sleeve 4 through a connecting rod 27. A sleeve 6 is arranged on the outer side of the annular plate 5. Specifically, the sleeve 6 is fixedly connected to the hammer body 1, and the annular plate 5 and the sleeve 6 are rotatably matched. A second coil spring 26 is sleeved on the outer side of the annular plate 5, and both ends of the second coil spring 26 are respectively connected to the outer wall of the annular plate 5 and the inner wall of the sleeve 6 to drive the sleeve 4 to reset.

[0047] During actual use, when the hammer body 1 lands on the ground and is about to be lifted, the pull rod 3 will be pulled to move upward relative to the hammer body 1. During this process, the pull rod 3 will drive one end of the traction rope 2 to move upward, thereby driving the limiting frame 7 to move upward relative to the reel 12 through the pull rope 20. Through the cooperation of the limiting block 23 and the limiting groove 24, the reel 12 can be driven to rotate. During the rotation of the reel 12, the connecting belt 11 will be wound. At this time, the connecting belt 11 located inside the sleeve 4 will move against the tension of the pull rope 20, that is, the blocking strip 13 will finally slide from one side of the protrusion 17 to the other side. During this process, the winding section 1101 on the connecting belt 11 moves away from the inner wall of the sleeve 4, thereby causing the soil inside the sleeve 4 to lose adhesion. Since there is a gap between the soil and the inner wall of the sleeve 4, when the hammer body 1 is lifted, the soil inside the sleeve 4 will fall out. When the blocking strip 13 is stuck on one side of the protrusion 17 and the reel 12 continues to rotate, the sleeve 4 can be driven to rotate against the acting force of the first coil spring 25 through the tension of the connecting belt 11 on the sleeve 4, thereby loosening the connecting belt 11 wound around the outer side of the sleeve 4. Finally, when the connecting belt 11 is completely led out from between the inner walls of the sleeve 4 and the through hole 14 and wound around the outer side of the reel 12, the diversion channel 31 between the sleeve 4 and the through hole 14 is in an open state. At this time, the outside air can smoothly enter between the hammer body 1 and the ground through the diversion channel 31, thereby avoiding the problem that the hammer body 1 is adsorbed on the ground and difficult to pull out;

[0048] During the process of releasing the pull rod 3 to allow the hammer body 1 to fall, the pull rod 3 moves downward relative to the hammer body 1 due to the pulling force of the support spring 9 and the gravity of the pull rod 3 itself, thereby loosening the traction rope 2. At this time, the first torsion spring 25 can drive the sleeve 4 to reset, thereby driving the connecting belt 11 to rewind around the outer side of the sleeve 4, and being placed between the sleeve 4 and the inner wall of the through hole 14 is beneficial for sealing the diversion channel 31, avoiding suddenly entering the inside of the diversion channel 31 after the hammer body 1 falls to the bottom surface. After that, the acting force of the second torsion spring 26 can cause the rotating shaft 29 to rotate in the reverse direction and wind up the pull rope 20, which is beneficial for driving the wound section 1101 on the connecting belt 11 to move back into the sleeve 4 again, facilitating the next use.

[0049] In summary, this device, through the cooperation of the connecting belt 11 with the connecting component and the winding component, during the process of lifting the hammer, the connecting belt 11 is led out from the inner wall of the sleeve 4 and between the sleeve 4 and the through hole 14, causing the soil inside the sleeve 4 to lose the basis for adhesion. After the hammer body 1 is lifted, the soil inside the sleeve 4 can fall out of the sleeve 4, thus facilitating the next use. And when the connecting belt 11 is led out from the diversion channel 31, external gas can enter between the hammer body 1 and the ground through the above-mentioned diversion channel 31, which is beneficial for avoiding the problem that the hammer body 1 is adsorbed on the ground and difficult to lift.

[0050] As Figure 3 shown, during actual use, an annular groove can be opened on the inner wall of the sleeve 4 to accommodate the wound section 1101 on the connecting belt 11, so that when the wound section 1101 is located in the groove, the inner side surface of the wound section 1101 is flush with the inner side surface of the sleeve 4, which is further beneficial for squeezing the soil into the sleeve 4, and the bottom end of the above-mentioned wrapped section 1102 is flush with the bottom surface of the hammer body 1, which is beneficial for preventing soil from entering the inside of the diversion channel 31. Of course, due to the setting of the above structure, the width of the wound section 1101 is smaller than the width of the wrapped section 1102.

[0051] During use, in order to prevent soil from entering the storage hole 18, a sealing block 15 is fixedly connected to the bottom surface of the hammer body 1 at the position of the storage hole 18. Of course, in actual application, a plurality of outwardly extending convex blocks can be arranged on the bottom surface of the hammer body 1. On the one hand, it has a crushing effect on the filling in the foundation. On the other hand, in some relatively dry areas, the above structure is beneficial for reducing the contact area between the hammer body 1 and the ground, thus facilitating the lifting of the hammer.

[0052] As Figure 1 、 Figure 9 shown, the above-mentioned connecting rod 27 can connect the sleeve 4 and the annular plate 5 by welding.

[0053] Of course, a notch 28 matching the connecting rod 27 can also be formed on the annular plate 5, so that one end of the connecting rod 27 is fixedly connected to the sleeve 4, and the other end of the connecting rod 27 passes through the notch 28, connecting the sleeve 4 and the annular plate 5 in this way, which is beneficial to buffering the sleeve 4, thereby avoiding damage to the connecting rod 27 during the process of the hammer body 1 compacting the foundation.

[0054] As Figure 8 shown, as the first embodiment of the above-mentioned pull rope 20, it can be made of steel wire, so that the end of the pull rope 20 far from the rotating shaft 29 is connected to the bottom or top end face of the clamping strip 16. Specifically, the number of pull ropes 20 connected to the same clamping strip 16 can be set to two, thus facilitating the pull rope 20 to stably drive the clamping strip 16 and the connecting belt 11 to reset.

[0055] As the second embodiment of the above-mentioned pull rope 20, as Figure 11 shown, the pull rope 20 can be made of materials such as rubber or nylon. Strip-shaped grooves matching the pull rope 20 are formed on the inner top surface and the bottom surface of the clamping groove 19, so that the upper half of the pull rope 20 is slidably arranged inside the strip-shaped groove, which is beneficial to preventing the pull rope 20 from detaching from the sleeve 4 and is beneficial to the pull rope 20 to stably drive the connecting belt 11 to reset.

[0056] As Figure 1 、 Figure 10 shown, a fixed frame 8 is fixedly connected to the top surface of the hammer body 1, and the limiting frame 7 is slidably arranged inside the fixed frame 8.

[0057] During actual use, a first spring 22 can be arranged at the bottom end of the limiting frame 7, so that both ends of the first spring 22 are fixedly arranged between the limiting frame 7 and the hammer body 1, so as to facilitate driving the limiting frame 7 to reset.

[0058] In addition, a ring can be sleeved outside the reel 12, the ring is fixedly connected to the hammer body 1, and a coil spring is sleeved on a section of the reel 12 located inside the ring, so that both ends of the coil spring are fixedly connected to the reel 12 and the inner wall of the ring respectively, thereby facilitating driving the reel 12 to reset.

[0059] As Figure 9 shown, a pulley is fixedly connected to the outside of the fixed frame 8, and the above-mentioned towing rope 2 passes outside the pulley, so as to stably drive the limiting frame 7 to move upward.

[0060] During actual use, the sum of the thickness of the winding section 1101 on the connecting belt 11 and the thickness of the clamping strip 16 is smaller than the thickness of the wrapping section 1102, so as to facilitate the winding section 1101 and the clamping ring 10 outside it to move between the sleeve 4 and the inner wall of the through hole 14.

[0061] A stop block 30 is fixedly connected to the inner wall of the through hole 14. The stop block 30 is arranged at the top of the connecting belt 11 to facilitate the vertical limit of the connecting belt 11 and prevent it from moving.

Claims

1. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation, including a hammer body and a pull rod slidably arranged on the hammer body, wherein a plurality of through holes are formed in the hammer body, and the characteristics are as follows: A sleeve is rotatably arranged in the through hole, and a connecting belt is wound around the sleeve; The connecting belt is clamped to the sleeve through a connecting component, and a winding component matched with the connecting belt is arranged on the hammer body. When the pull rod moves upward relative to the hammer body, the winding component rotates and winds the connecting belt, so that the connecting belt is led out from the sleeve, and a diversion channel is formed between the sleeve and the inner wall of the through hole.

2. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation according to claim 1, characterized in that: The connecting belt includes a winding section wound inside the sleeve and a wrapping section wound outside the sleeve. The winding section is attached to the inner wall of the sleeve, and the wrapping section is arranged between the sleeve and the inner wall of the through hole and contacts the outer peripheral wall of the sleeve and the inner wall of the through hole.

3. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation according to claim 2, characterized in that: The connecting component includes a plurality of card strips fixedly connected to the outer side of the connecting belt. The card strips are arranged at the winding section. A card slot slidably matched with the card strips is formed in the inner wall of the sleeve. One end of the connecting belt at the winding section is fixedly connected with a stop strip. A protrusion is formed by the inner wall of the sleeve protruding outward. The stop strip is arranged on one side of the protrusion. The winding section on the connecting belt extends along the inner wall of the sleeve from the stop strip to the other side of the protrusion, then passes through the sleeve and enters between the sleeve and the through hole. A columnar mounting hole is formed in the pipe wall of the sleeve. A rotating shaft is rotatably arranged in the mounting hole. A pull rope is fixed to the outer side of the rotating shaft. One end of the pull rope is wound around the rotating shaft, and the other end of the pull rope extends to the card strip and is fixedly connected with the card strip. Bushings are sleeved at both ends of the rotating shaft, and the bushings are fixedly arranged in the mounting hole. A first coil spring is sleeved on a section of the rotating shaft placed in the bushing. Two ends of the first coil spring are respectively connected with the rotating shaft and the bushing.

4. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation according to claim 3, characterized in that: The winding component includes a reel rotatably matched with the hammer body. A storage hole is formed in the bottom surface of the hammer body. The reel is arranged at the center of the storage hole. The top end of the reel passes through the hammer body and is rotatably connected with it. The wrapping section on the connecting belt extends to the mounting hole and is fixedly connected with the reel. A limiting frame is sleeved on the outer top end of the reel. The limiting frame is prismatic and a central hole matched with the reel is formed at its center. A spiral limiting groove is formed on the outer side wall of the reel. A limiting block slidably matched with the limiting groove is fixedly connected to the inner wall of the central hole. A bracket is fixedly connected to the top of the limiting frame. A traction rope is arranged between the bracket and the pull rod.

5. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation according to claim 1, characterized in that: An annular plate is sleeved outside the sleeve, and the annular plate is connected with the sleeve through a connecting rod. A sleeve is arranged on the outer side of the annular plate. The sleeve is fixedly connected with the hammer body. The annular plate and the sleeve are rotatably matched. A second coil spring is sleeved on the outer side of the annular plate. Two ends of the second coil spring are respectively connected with the annular plate and the sleeve.

6. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation according to claim 2, characterized in that: A ring-shaped groove is formed in the inner wall of the sleeve. The winding section on the connecting belt is located in the groove.

7. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation according to claim 2, characterized in that: The bottom end of the wrapping section is flush with the bottom surface of the hammer body.

8. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation according to claim 1, characterized in that: A plurality of convex blocks extending outward are arranged at the bottom of the hammer body.

9. A dynamic compaction hammer for dynamic compaction construction of soft soil foundation according to claim 1, characterized in that: A connecting hole is formed at the center of the hammer body. The cross section of the connecting hole is T-shaped. A snap ring is fixedly sleeved on the outer side of the pull rod. The snap ring is slidably arranged in the connecting hole. A support spring is sleeved on the outer side of the pull rod. Two ends of the support spring are respectively fixed to the snap ring and the end face of the connecting hole.

10. A dynamic compaction construction method for soft soil foundation using a dynamic compaction hammer for soft soil foundation dynamic compaction construction as described in any one of claims 1-9, characterized in that, It includes the following steps: S1. Drive the hammer body to move upward through the pull rod. The pull rod drives the reel to rotate through the traction rope, so as to wind up the connecting belt, so that the connecting belt is led out from the sleeve and the through hole, and the external air can enter between the hammer body and the bottom surface through the diversion channel; S2. Release the hammer body, and the pull rod moves downward relative to the hammer body. During this process, the traction rope is loosened and the reel rotates reversely to reset, so that the connecting belt re-enters the sleeve and the through hole, avoiding the entry of soil into the diversion channel during the process of compacting the foundation.

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