Dynamic compaction equipment and construction methods for soft soil foundations

Abstract

This invention relates to the field of soft soil foundation reinforcement technology, specifically to a dynamic compaction construction device and method for soft soil foundations. The device includes a perforating rod and an operating assembly. The operating assembly includes a fixed plate, positioning strips, and a first movable block. The fixed plate is coaxially fixed to the top of the perforating rod, and a first fixing hole is formed on the side wall of the fixed plate. Two positioning strips are slidably connected, each with a circular through hole and a guide ring fixedly mounted. Each positioning strip also has a buckle that engages with the first fixing hole. The first movable block is slidably positioned at the center of the side of the fixed plate away from the perforating rod. This invention can limit the direction of the artificial channels generated by the perforating rod while adapting to different construction requirements. It ensures that the drainage direction of soil moisture under subsequent compaction is uniformly oriented in one direction, ensuring good overall drainage without requiring additional manpower and resources.

Description

Technical Field

[0001] This invention relates to the field of soft soil foundation reinforcement technology, specifically to a dynamic compaction construction device and method 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.

[0003] Chinese patent CN112127343B discloses a perforation construction device and method for dynamic compaction of soft soil foundations. By setting up perforation wells and filling them with solid filler, artificial conduits with a certain flow guiding capacity can be formed, which greatly facilitates the squeezing and drainage operation during dynamic compaction. At the same time, the conduits are not easily blocked, and under the action of the hammer, they have an effect similar to squeezing water out of the compaction machine, resulting in more thorough drainage, which is beneficial to subsequent compaction and less likely to form rubber soil. The perforation wells are evenly spaced vertically, forming a multi-level radial pattern with the perforation well as the center. The aggregate filled in the perforation wells can replace the soft soil and effectively transmit the gravity generated by the irregular hammer to the ground, allowing for deeper force transmission. However, when using this scheme, because the perforating rod is inserted into the perforation well, the direction of the filling material injected into the perforating rod cannot be observed. This leads to inconsistent directions of the artificial conduits formed inside several perforation wells, which in turn causes the drainage direction under the action of the hammer to be inconsistent towards the open channel, resulting in an unsatisfactory overall drainage effect. Summary of the Invention

[0004] To address the aforementioned issues, a dynamic compaction construction device for soft soil foundations is provided. The device uses a fixed plate and positioning strip to quickly define the working position of the perforating rod. A snap-fit ​​mechanism with the first fixing hole allows for filling the perforating rod without moving the positioning strip. The first movable block allows for quick and easy release of the fixed connection between the perforating rod and the positioning strip.

[0005] To address the problems in the existing technology, the technical solution adopted by this invention is as follows:

[0006] A dynamic compaction device for soft soil foundations is provided, including a perforating rod and an operating assembly. The operating assembly includes a fixed plate, positioning strips, and a first movable block. The fixed plate is coaxially fixed at the top of the perforating rod. A first fixing hole is opened on the side wall of the fixed plate. A gripping rod is provided on the top surface of the fixed plate. There are two positioning strips, which are slidably connected along their own length. A circular through hole is opened at the opposite end of the two positioning strips for the perforating rod to slide through. A guide ring coaxial with the circular through hole is fixedly installed on the downward-facing side of the positioning strip. The guide ring has a triangular cross-section. A buckle that can cooperate with the first fixing hole is provided on the positioning strip. The first movable block is slidably positioned at the center of the side of the fixed plate away from the perforating rod. The sliding direction of the first movable block is parallel to the axis of the fixed plate. When the first movable block moves towards the fixed plate, it will cause the buckle to disengage from the first fixing hole.

[0007] Preferably, the operating component further includes a second movable block and a hinge rod. The second movable block is slidably disposed in the first fixed hole, and the sliding direction of the second movable block is parallel to the diameter direction of the fixed plate. One end of the hinge rod is hinged to the first movable block, and the other end of the hinge rod is hinged to the second movable block. The buckle is slidably connected to the positioning strip, and the sliding direction of the buckle is parallel to the width direction of the positioning strip. A first tension spring is fixedly disposed between the buckle and the positioning strip, and the axis of the first tension spring is parallel to the sliding direction of the buckle.

[0008] Preferably, a positioning strip is provided with two buckles, which are mirror images of each other along the width direction of the positioning strip. There are four first fixing holes, which are evenly distributed around the axis of the fixing plate. There are also four gripping rods, which are evenly distributed around the axis of the fixing plate.

[0009] Preferably, a limiting bolt is fixedly provided on the positioning strip, and a first limiting groove is provided on the buckle to slide in coordination with the limiting bolt. The length direction of the first limiting groove is parallel to the sliding direction of the buckle.

[0010] Preferably, the operating component further includes a first spring, one end of which is fixedly connected to the second movable block, and the other end of which is fixedly connected to the fixed disk. The axis of the first spring is parallel to the sliding direction of the second movable block.

[0011] Preferably, the operating component further includes a second tension spring, one end of which is fixedly connected to the first movable block, and the other end of which is fixedly connected to the fixed disk. The axis of the second tension spring is parallel to the axis of the fixed disk, and the top surface of the gripping rod is parallel to the top surface of the fixed disk.

[0012] Preferably, one positioning bar has a second limiting groove, the length direction of the second limiting groove is parallel to the length direction of the positioning bar, and the other positioning bar has a limiting protrusion that slides with the second limiting groove. A guide shaft that slides with the limiting protrusion is fixedly installed in the second limiting groove.

[0013] Preferably, a U-shaped component is slidably mounted on a positioning strip with limit protrusions. The sliding direction of the U-shaped component is parallel to the axis of the circular through hole. The two protruding ends of the U-shaped component face upwards and are not at the same height. A second spring is fixedly mounted between the U-shaped component and the positioning strip. The axis of the second spring is parallel to the sliding direction of the U-shaped component. Another positioning strip has a second fixing hole that works with the U-shaped component. There is at least one second fixing hole, and all the second fixing holes are evenly arranged along the length of the positioning strip.

[0014] Preferably, a third spring is sleeved on the guide shaft, one end of the third spring is fixedly connected to the limiting protrusion, and the other end of the third spring is fixedly connected to the positioning strip that does not have the limiting protrusion.

[0015] The method for dynamic compaction construction of soft soil foundation, using the aforementioned dynamic compaction construction device, includes the following steps:

[0016] S1. Excavate an open channel along the edge line around the area to be compacted, and draw up construction drawings. Insert the perforating rod into the circular through hole of the positioning strip and make the fixing plate contact the positioning strip.

[0017] S2. The perforating rod is fixedly connected to the operating component by the cooperation of the buckle and the first fixing hole. Perforating wells are drilled in an orderly manner in the area to be compacted according to the construction drawings.

[0018] S3. Adjust the distance between the two positioning strips so that the distance between the circular through holes on the two positioning strips is equal to the distance between adjacent perforation wells in the area to be compacted, and insert the perforation rod into the hole in the area to be compacted.

[0019] S4. By rotating the perforating rod, the positioning strip is rotated, so that the guide ring on another positioning strip is inserted into the adjacent perforation well. The perforating rod is started so that the aggregate inside the perforating rod forms a guide tube inside the area to be compacted.

[0020] S5. By pressing the first movable block, the fixed connection between the perforating rod and the positioning strip is canceled, the perforating rod is taken out of the perforation well and new aggregate is filled in. Then, the perforating rod is inserted into the circular through hole of another positioning strip and the two are fixed. The perforating rod is rotated again so that the guide ring on the other positioning strip is inserted into the adjacent perforation well again.

[0021] The advantages of this invention compared to the prior art are:

[0022] This invention achieves the function of quickly defining the working position of the perforating rod through the cooperation of the fixed plate and the positioning strip. The function of the buckle and the first fixed hole allows the perforating rod to be filled without moving the positioning strip. The function of the first movable block allows the fixed connection between the perforating rod and the positioning strip to be quickly and easily released. Thus, it can limit the direction of the artificial pipe generated by the perforating rod while adapting to different construction requirements. It ensures that the drainage direction of the soil moisture under the action of the tamping hammer is uniformly oriented in one direction, ensuring good overall drainage effect without spending additional manpower and resources. Attached Figure Description

[0023] Figure 1 This is a three-dimensional diagram of a dynamic compaction device for soft soil foundations. Figure 1 ;

[0024] Figure 2 yes Figure 1 A magnified view of part A in the diagram;

[0025] Figure 3 This is a three-dimensional diagram of a dynamic compaction device for soft soil foundations. Figure 2 ;

[0026] Figure 4 yes Figure 3 A magnified view of part B in the diagram;

[0027] Figure 5 This is a side view of a dynamic compaction device for soft soil foundations;

[0028] Figure 6 This is a three-dimensional exploded view of a dynamic compaction construction device for soft soil foundations;

[0029] Figure 7 This is a three-dimensional exploded view of the operating components in a dynamic compaction construction device for soft soil foundations.

[0030] Figure 8 yes Figure 7 A magnified view of part of C;

[0031] Figure 9 This is a three-dimensional schematic diagram of the fixed disk in the operating components;

[0032] Figure 10 This is a three-dimensional sectional view of the fixed disk in the operating components;

[0033] Figure 11 This is a three-dimensional exploded view of the fixed disk in the operating components.

[0034] The numbers on the map are:

[0035] 1-Perforation rod;

[0036] 2-Operating components;

[0037] 21-Fixing plate; 211-First fixing hole; 212-Holding rod;

[0038] 22-Positioning strip; 221-Circular through hole; 222-Guide ring; 223-Snap fastener; 2231-First tension spring; 2232-First limiting groove; 224-Limiting bolt; 225-Second limiting groove; 226-Limiting protrusion; 227-Guide shaft; 228-U-shaped part; 2281-Second spring; 2282-Third spring; 229-Second fixing hole;

[0039] 23-First active block;

[0040] 24 - Second Activity Block;

[0041] 25-Hinged rod;

[0042] 26 - First spring;

[0043] 27 - Second tension spring. Detailed Implementation

[0044] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0045] See Figures 1 to 5 As shown, the soft soil foundation dynamic compaction construction device includes a perforating rod 1 and an operating component 2. The operating component 2 includes a fixed plate 21, positioning strips 22, and a first movable block 23. The fixed plate 21 is coaxially fixedly mounted on the top of the perforating rod 1. A first fixing hole 211 is opened on the side wall of the fixed plate 21. A gripping rod 212 is provided on the top surface of the fixed plate 21. There are two positioning strips 22, which are slidably connected along their own length. The ends of the two positioning strips 22 that are far apart from each other are provided with circular through holes 221 through which the perforating rod 1 slides. A guide ring 222, coaxial with the circular through hole 221, is fixedly installed on the downward-facing side of the positioning strip 22. The cross-section of the guide ring 222 is triangular. A buckle 223 that can cooperate with the first fixing hole 211 is provided on the positioning strip 22. The first movable block 23 is slidably disposed at the center of the side of the fixed plate 21 away from the perforating rod 1. The sliding direction of the first movable block 23 is parallel to the axial direction of the fixed plate 21. When the first movable block 23 moves toward the fixed plate 21, the buckle 223 will disengage from the first fixing hole 211.

[0046] According to the construction plan, corresponding construction drawings are drawn, and the optimal spacing between adjacent perforation wells is calculated. Marking lines are made in the area to be compacted with marker powder, and open channels are dug along the perimeter of the area. The depth of the open channels is adapted to the depth of the perforation wells. Then, aggregate is filled into the interior of the perforation rod 1, and the perforation rod 1 is inserted into the circular through hole 221 of the positioning strip 22, so that the fixing plate 21 contacts the positioning strip 22. The positioning strip 22 and the perforation rod 1 are controlled to rotate relative to each other, thereby fixing the perforation rod 1 to the operating component 2 through the cooperation of the buckle 223 and the first fixing hole 211. This securely connects the perforation rod 1 to the operating component 2. The perforation rod is then systematically compacted in the area according to the construction drawings. Drill perforations, controlling the relative sliding of two positioning strips 22 so that the distance between the circular through holes 221 on the two positioning strips 22 is equal to the spacing between adjacent perforations in the area to be compacted. Insert the perforating rod 1 into the hole in the area to be compacted so that the lower surface of the positioning strip 22 is slightly higher than the ground. Rotate the perforating rod 1 so that the two positioning strips 22, which are fixedly connected to the perforating rod 1, rotate simultaneously around the axis of the perforating rod 1. This allows the guide ring 222 on the positioning strip 22 away from the perforating rod 1 to be inserted into the perforation adjacent to the perforation into which the perforating rod 1 is inserted. At this point, start the perforating rod 1 so that the aggregate inside the rod is compacted in the area to be compacted. An internal guide tube is formed. After the perforating rod 1 has finished its work, pressing the first movable block 23 cancels the fixed connection between the perforating rod 1 and the positioning strip 22, allowing the perforating rod 1 to be removed from the perforation well and new aggregate to be filled. Then, the perforating rod 1 is inserted into the circular through hole 221 of another positioning strip 22 and the two are fixed together. The perforating rod 1 is rotated again so that the two positioning strips 22, which are now fixedly connected to the perforating rod 1, rotate simultaneously around the axis of the perforating rod 1. This allows the guide ring 222 on the positioning strip 22 away from the perforating rod 1 to be inserted into another adjacent perforation well. Compared to the prior art, the fixing plate 21 and the positioning strip 22 of this invention... The positioning strip 22, in conjunction with the perforating rod 1, quickly defines the working position of the perforating rod 1. The buckle 223 and the first fixing hole 211 work together to ensure that the perforating rod 1 does not need to be moved when filling. The first movable block 23 allows for quick and easy release of the fixed connection between the perforating rod 1 and the positioning strip 22. This allows for the limitation of the direction of the artificial pipe generated by the perforating rod 1 while adapting to different construction requirements. It ensures that the drainage direction of the soil moisture is uniformly oriented in one direction under the subsequent action of the tamping hammer, ensuring good overall drainage effect without the need for additional manpower and resources.

[0047] See Figure 1 and Figures 7-11As shown: The operating component 2 also includes a second movable block 24 and a hinge rod 25. The second movable block 24 is slidably disposed in the first fixed hole 211. The sliding direction of the second movable block 24 is parallel to the diameter direction of the fixed plate 21. One end of the hinge rod 25 is hinged to the first movable block 23, and the other end of the hinge rod 25 is hinged to the second movable block 24. The buckle 223 is slidably connected to the positioning strip 22. The sliding direction of the buckle 223 is parallel to the width direction of the positioning strip 22. A first tension spring 2231 is fixedly disposed between the buckle 223 and the positioning strip 22. The axis of the first tension spring 2231 is parallel to the sliding direction of the buckle 223.

[0048] When the buckle 223 engages in the first fixing hole 211 to complete the fixed connection between the positioning strip 22 and the fixing plate 21, the first spring 26 is in its normal state. At this time, pressing the first movable block 23 causes it to move downward along the axis of the fixing plate 21. The first movable block 23, in conjunction with the hinge rod 25, causes the second movable block 24 to move along the diameter of the fixing plate 21, causing the buckle 223 to move away from the center of the circular through hole 221. The first spring 26 is stretched. At this time, the fixing plate 21 drives the entire perforating rod 1 to move upward and disengage from the positioning strip 22. Compared with the prior art, the second movable block 24 and the hinge rod 25 of the present invention cooperate to release the fixed connection between the perforating rod 1 and the positioning strip 22 by pressing the first movable block 23, thereby facilitating the user to remove the perforating rod 1 for aggregate filling.

[0049] See Figures 6 to 11 As shown: Two buckles 223 are provided on a positioning strip 22. The two buckles 223 are mirror images of the positioning strip 22 along the width direction of the positioning strip 22. There are four first fixing holes 211. All the first fixing holes 211 are evenly arranged around the axis of the fixing plate 21. There are four gripping rods 212. All the gripping rods 212 are evenly arranged around the axis of the fixing plate 21.

[0050] Insert the perforating rod 1 into the circular through hole 221 and make the fixing plate 21 contact the positioning strip 22. If the perforating rod 1 is not fixedly connected to the positioning strip 22, rotate the perforating rod 1. Then, the two buckles 223 will be engaged into the two spaced first fixing holes 211. At this time, the perforating rod 1 and the positioning strip 22 are fixedly connected. Compared with the prior art, the buckles 223 and the first fixing holes 211 of the present invention are limited in number and position, which facilitates the fixed connection between the positioning strip 22 and the perforating rod 1 while ensuring the stability of the connection.

[0051] See Figures 7 to 8As shown: a limiting bolt 224 is fixedly installed on the positioning strip 22, and a first limiting groove 2232 is opened on the buckle 223 to cooperate with the limiting bolt 224 to slide. The length direction of the first limiting groove 2232 is parallel to the sliding direction of the buckle 223.

[0052] When the buckle 223 is not engaged in the first fixing hole 211, the buckle 223 can slide freely on the positioning strip 22. The first spring 26 moves continuously as the buckle 223 moves. When the buckle 223 moves a certain distance, the limiting bolt 224 contacts the end of the first limiting groove 2232, and the buckle 223 stops moving. Compared with the prior art, the limiting bolt 224 and the first limiting groove 2232 of the present invention limit the movement range of the buckle 223, thereby ensuring that the buckle 223 cannot detach from the connection with the positioning strip 22.

[0053] See Figure 1 and Figures 9-11 As shown: the operating component 2 also includes a first spring 26, one end of the first spring 26 is fixedly connected to the second movable block 24, the other end of the first spring 26 is fixedly connected to the fixed disk 21, and the axis of the first spring 26 is parallel to the sliding direction of the second movable block 24.

[0054] In the absence of external force, all the first springs 26 are in normal condition, and the second movable block 24, which is fixedly connected to the first spring 26, will be in a position close to the center of the fixed plate 21. At this time, when the buckle 223 is inserted into the first fixed hole 211, it will not collide with the second movable block 24. Compared with the prior art, the first spring 26 of the present invention limits the default position of the second movable block 24, thereby ensuring that the buckle 223 can be properly inserted into the first fixed hole 211.

[0055] See Figure 1 and Figures 9-11 As shown: the operating component 2 also includes a second tension spring 27. One end of the second tension spring 27 is fixedly connected to the first movable block 23, and the other end of the second tension spring 27 is fixedly connected to the fixed disk 21. The axis of the second tension spring 27 is parallel to the axis of the fixed disk 21, and the top surface of the gripping rod 212 is parallel to the top surface of the fixed disk 21.

[0056] In the absence of external force, the second tension spring 27 is in its normal state. Under the operation of the second tension spring 27, the position of the first movable block 23 will not move arbitrarily. At this time, the top surface of the first movable block 23 is parallel to the top surface of the fixed plate 21. Compared with the prior art, the second tension spring 27 of the present invention limits the default position of the first movable block 23, thereby ensuring that the first movable block 23 will not protrude from the fixed plate 21 and thus avoid accidental contact.

[0057] See Figure 7 As shown: A second limiting groove 225 is provided on one positioning strip 22, and the length direction of the second limiting groove 225 is parallel to the length direction of the positioning strip 22. A limiting protrusion 226 is provided on the other positioning strip 22 to slide in conjunction with the second limiting groove 225. A guide shaft 227 that is slidably connected to the limiting protrusion 226 is fixedly provided in the second limiting groove 225.

[0058] This causes relative sliding between the two positioning strips 22. The positioning strips 22 will slide along the length direction of the second limiting groove 225 through the cooperation of the guide shaft 227 and the limiting protrusion 226. Compared with the prior art, the second limiting groove 225, the limiting protrusion 226 and the guide shaft 227 of the present invention cooperate to limit the sliding direction of the positioning strips 22, thereby ensuring that the guide rings 222 on the two positioning strips 22 can be inserted into the perforation well.

[0059] See Figure 7 As shown: A U-shaped component 228 is slidably mounted on a positioning strip 22 with a limit protrusion 226. The sliding direction of the U-shaped component 228 is parallel to the axis of the circular through hole 221. The two protruding ends of the U-shaped component 228 face upwards and are not at the same height. A second spring 2281 is fixedly mounted between the U-shaped component 228 and the positioning strip 22. The axis of the second spring 2281 is parallel to the sliding direction of the U-shaped component 228. Another positioning strip 22 has a second fixing hole 229 that works with the U-shaped component 228. There is at least one second fixing hole 229, and all the second fixing holes 229 are evenly arranged along the length of the positioning strip 22.

[0060] Pressing the U-shaped part 228 causes it to retract into the interior of the positioning strip 22. At this time, the two positioning strips 22 are controlled to slide relative to each other. When the two positioning strips 22 slide to the appropriate position, the U-shaped part 228 is released, and one end of the U-shaped part 228 protrudes and gets into the second fixing hole 229. At this time, the relative position between the two positioning strips 22 is fixed. Compared with the prior art, the U-shaped part 228 and the second fixing hole 229 of the present invention cooperate to allow the relative position between the two positioning strips 22 to be freely fixed, thereby ensuring that the relative distance between the two positioning strips 22 does not change when the positioning strips 22 rotate with the perforating rod 1.

[0061] See Figure 7 As shown: A third spring 2282 is sleeved on the guide shaft 227. One end of the third spring 2282 is fixedly connected to the limiting protrusion 226, and the other end of the third spring 2282 is fixedly connected to the positioning strip 22, which does not have the limiting protrusion 226.

[0062] When the U-shaped part 228 is pressed to retract into the positioning strip 22 and the two positioning strips 22 are controlled to move away from each other, the third spring 2282 is continuously compressed, thereby increasing the relative distance between the two positioning strips 22. After the entire operation is completed, the U-shaped part 228 is pressed to retract into the positioning strip 22. At this time, the third spring 2282 is in the compressed state, which makes the gap between the two positioning strips 22 smaller. Compared with the prior art, the third spring 2282 of the present invention makes the gap between the two positioning strips 22 automatically smaller when the fixed state between them is released, thus facilitating storage after use.

[0063] See Figures 1 to 5 The method for dynamic compaction of soft soil foundations, using the aforementioned dynamic compaction equipment, includes the following steps:

[0064] S1. Excavate an open channel along the edge line around the area to be compacted, and draw up construction drawings. Insert the perforating rod 1 into the circular through hole 221 of the positioning strip 22 and make the fixing plate 21 contact the positioning strip 22.

[0065] S2. The perforating rod 1 is fixedly connected to the operating component 2 by the cooperation of the buckle 223 and the first fixing hole 211, and perforating wells are drilled in an orderly manner in the area to be compacted according to the construction drawings.

[0066] S3. Adjust the distance between the two positioning strips 22 so that the distance between the circular through holes 221 on the two positioning strips 22 is equal to the spacing between adjacent perforation wells in the area to be compacted, and insert the perforation rod 1 into the hole in the area to be compacted.

[0067] S4. By rotating the perforating rod 1, the positioning strip 22 is rotated, so that the guide ring 222 on the other positioning strip 22 is inserted into the adjacent perforation well. The perforating rod 1 is started so that the aggregate inside the perforating rod 1 forms a guide tube inside the area to be compacted.

[0068] S5. By pressing the first movable block 23, the fixed connection between the perforating rod 1 and the positioning strip 22 is canceled, the perforating rod 1 is taken out of the perforation well and new aggregate is filled in. Then, the perforating rod 1 is inserted into the circular through hole 221 of another positioning strip 22 and the two are fixed. The perforating rod 1 is rotated again so that the guide ring 222 on the other positioning strip 22 is inserted into the adjacent perforation well again.

[0069] Compared to existing technologies, the fixed plate 21 and positioning strip 22 of this invention work together to quickly define the working position of the perforating rod 1. The buckle 223 and the first fixing hole 211 work together so that the positioning strip 22 does not need to be moved when filling the perforating rod 1. The fixed connection between the perforating rod 1 and the positioning strip 22 can be quickly and easily released through the first movable block 23. This allows the direction of the artificial pipe generated by the perforating rod 1 to be defined while adapting to different construction requirements. It ensures that the drainage direction of the soil moisture under the action of the tamping hammer is uniformly oriented in one direction, ensuring good overall drainage effect without the need for additional manpower and material resources.

[0070] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A dynamic compaction device for soft soil foundation, comprising a perforating rod (1) and an operating assembly (2), characterized in that, The operating component (2) includes a fixed plate (21), a positioning bar (22), and a first movable block (23); The fixed plate (21) is coaxially fixed at the top of the perforating rod (1). The first fixing hole (211) is opened on the side wall of the fixed plate (21), and the top surface of the fixed plate (21) is provided with a gripping rod (212). There are two positioning strips (22). The two positioning strips (22) are slidably connected along their own length. The ends of the two positioning strips (22) that are far apart from each other are provided with circular through holes (221) through which the injection rod (1) slides. A guide ring (222) coaxial with the circular through hole (221) is fixedly provided on the side of the positioning strip (22) facing downward. The cross section of the guide ring (222) is triangular. The positioning strip (22) is provided with a buckle (223) that can cooperate with the first fixing hole (211). The first movable block (23) is slidably set at the center of the side of the fixed plate (21) away from the perforating rod (1). The sliding direction of the first movable block (23) is parallel to the axial direction of the fixed plate (21). When the first movable block (23) moves towards the fixed plate (21), the buckle (223) will be released from its engagement with the first fixed hole (211).

2. The soft soil foundation dynamic compaction construction device according to claim 1, characterized in that, The operating component (2) also includes a second movable block (24) and a hinge rod (25); The second movable block (24) is slidably disposed in the first fixed hole (211). The sliding direction of the second movable block (24) is parallel to the diameter direction of the fixed plate (21). One end of the hinge rod (25) is hinged to the first movable block (23), and the other end of the hinge rod (25) is hinged to the second movable block (24). The buckle (223) is slidably connected to the positioning strip (22). The sliding direction of the buckle (223) is parallel to the width direction of the positioning strip (22). A first tension spring (2231) is fixedly disposed between the buckle (223) and the positioning strip (22). The axis of the first tension spring (2231) is parallel to the sliding direction of the buckle (223).

3. The soft soil foundation dynamic compaction construction device according to claim 2, characterized in that, Two buckles (223) are provided on a positioning strip (22). The two buckles (223) are mirror images of the positioning strip (22) along the width direction of the positioning strip (22). There are four first fixing holes (211). All the first fixing holes (211) are evenly arranged around the axis of the fixing plate (21). There are four gripping rods (212). All the gripping rods (212) are evenly arranged around the axis of the fixing plate (21).

4. The soft soil foundation dynamic compaction construction device according to claim 3, characterized in that, A limiting bolt (224) is fixedly installed on the positioning strip (22), and a first limiting groove (2232) is opened on the buckle (223) to slide in coordination with the limiting bolt (224). The length direction of the first limiting groove (2232) is parallel to the sliding direction of the buckle (223).

5. The soft soil foundation dynamic compaction construction device according to claim 4, characterized in that, The operating component (2) also includes a first spring (26); One end of the first spring (26) is fixedly connected to the second movable block (24), and the other end of the first spring (26) is fixedly connected to the fixed plate (21). The axis of the first spring (26) is parallel to the sliding direction of the second movable block (24).

6. The soft soil foundation dynamic compaction construction device according to claim 5, characterized in that, The operating component (2) also includes a second tension spring (27); One end of the second tension spring (27) is fixedly connected to the first movable block (23), and the other end of the second tension spring (27) is fixedly connected to the fixed plate (21). The axis of the second tension spring (27) is parallel to the axis of the fixed plate (21), and the top surface of the gripping rod (212) is parallel to the top surface of the fixed plate (21).

7. The soft soil foundation dynamic compaction construction device according to claim 6, characterized in that, A second limiting groove (225) is provided on one positioning bar (22), the length direction of the second limiting groove (225) is parallel to the length direction of the positioning bar (22), and a limiting protrusion (226) is provided on the other positioning bar (22) to slide in conjunction with the second limiting groove (225). A guide shaft (227) that is slidably connected to the limiting protrusion (226) is fixedly provided in the second limiting groove (225).

8. The soft soil foundation dynamic compaction construction device according to claim 7, characterized in that, A U-shaped part (228) is slidably disposed on a positioning strip (22) with a limit protrusion (226). The sliding direction of the U-shaped part (228) is parallel to the axis of the circular through hole (221). The two protruding ends of the U-shaped part (228) are set upwards. The two protruding ends of the U-shaped part (228) are not at the same height. A second spring (2281) is fixedly disposed between the U-shaped part (228) and the positioning strip (22). The axis of the second spring (2281) is parallel to the sliding direction of the U-shaped part (228). Another positioning strip (22) is provided with a second fixing hole (229) that works with the U-shaped part (228). The number of second fixing holes (229) is at least one. All the second fixing holes (229) are evenly disposed along the length direction of the positioning strip (22).

9. The soft soil foundation dynamic compaction construction device according to claim 8, characterized in that, A third spring (2282) is sleeved on the guide shaft (227). One end of the third spring (2282) is fixedly connected to the limiting protrusion (226), and the other end of the third spring (2282) is fixedly connected to the positioning strip (22) which does not have the limiting protrusion (226).

10. A method for dynamic compaction construction of soft soil foundation, using the dynamic compaction construction device for soft soil foundation as described in any one of claims 1-9, characterized in that, It includes the following steps: S1. Excavate an open channel along the edge line around the area to be compacted, and draw up construction drawings. Insert the perforating rod (1) into the circular through hole (221) of the positioning strip (22) and make the fixing plate (21) contact the positioning strip (22). S2. The perforating rod (1) is fixedly connected to the operating component (2) by the cooperation of the buckle (223) and the first fixing hole (211), and perforating wells are drilled in an orderly manner in the area to be compacted according to the construction drawings. S3. Adjust the distance between the two positioning strips (22) so that the distance between the circular through holes (221) on the two positioning strips (22) is equal to the distance between adjacent perforation wells on the area to be compacted. Insert the perforation rod (1) into the hole in the area to be compacted. S4. By rotating the perforating rod (1), the positioning strip (22) is rotated, so that the guide ring (222) on the other positioning strip (22) is inserted into the adjacent perforation well. The perforating rod (1) is started so that the aggregate inside the perforating rod (1) forms a guide tube inside the area to be compacted. S5. By pressing the first movable block (23), the fixed connection between the perforating rod (1) and the positioning strip (22) is canceled. The perforating rod (1) is taken out of the perforation well and filled with new aggregate. Then, the perforating rod (1) is inserted into the circular through hole (221) of another positioning strip (22) and the two are fixed. The perforating rod (1) is rotated again so that the guide ring (222) on the other positioning strip (22) is inserted into the adjacent perforation well again.

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