Large-tonnage dynamic compaction construction method

Abstract

The invention discloses a large-tonnage dynamic compaction construction method, which comprises a dynamic compaction device and a dynamic compaction method, the device comprises a rammer body, and the top of the rammer body is provided with a flying stone protective net mechanism; the flying stone protection net mechanism comprises an annular fixing rod, and a plurality of protection rods are hinged to the annular fixing rod. A fan-shaped area is formed between every two adjacent protection rods, and a spring net is fixedly connected into each fan-shaped area; the spring net comprises a plurality of protection springs with the lengths distributed in a gradient mode. The protection spring is used for protecting and blocking splashed flying stones in the tamping process; the bottom of the annular fixing rod is fixedly connected to the top of the rammer body through stand columns, and the stand columns are distributed between the adjacent protection rods. According to the device structure, the kinetic energy of flying rocks is successfully reduced under the protection of the spring net when the flying rocks impact the spring net structure, so that the destructiveness of the flying rocks is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of dynamic compaction, and in particular relates to a large-tonnage dynamic compaction construction method. Background Art

[0002] Dynamic tamping is a device used to tamp the foundation during construction. The most common tamping machine in the construction process is the dynamic tamping machine. The main structure of the dynamic tamping machine includes a relatively high frame, a motor installed on the frame, a wire rope, a tamping hammer, and a decoupler for locking and unhooking the tamping hammer. During operation, the decoupler is hung on the mounting bracket on the tamping hammer. As the tamping hammer is lifted to a certain height, the wire rope pulled on the decoupler handle gradually straightens and the handle is pulled. Driven by the handle, the hook on the decoupler is separated from the mounting bracket on the tamping hammer. At this time, the heavy tamping hammer falls freely from a high altitude and hits the ground to form a tamping hole.

[0003] During the tamping process, once the heavy and high-speed edge of the tamping hammer hits the gravel on the ground, the gravel is likely to splash upwards under the high impact, and the kinetic energy given to the gravel by the tamping hammer is very high, and the splashing gravel is very likely to fly randomly and cause great safety hazards. Especially when the randomly flying gravel hits the construction personnel and construction equipment, it will cause a major safety accident.

[0004] Specifically, due to the complex construction ground conditions, when the bottom edge of the rammer touches the gravel, it generates a force on the gravel, which causes the flying stones to splash. At the same time, the huge air wave and impact force generated when the rammer falls are also one of the factors that cause the gravel to bounce.

[0005] However, the current compaction operations do not have any protective devices. Specifically, during the free fall of the rammer, the air resistance is relatively large. If protective structures such as covers to prevent flying stones are installed, not only will the air resistance be easily increased, resulting in a reduction in the ramming kinetic energy of the rammer, but the cover structure will also be affected by the large air resistance, which can easily cause the rammer's movement trajectory to deviate. Summary of the invention

[0006] Based on the above background, the object of the present invention is to provide a large-tonnage dynamic compaction construction method.

[0007] To achieve the above objectives, the present invention adopts the following technical solutions:

[0008] A large-tonnage dynamic compaction construction method includes a dynamic compaction device and a dynamic compaction method. The device includes a rammer body, and a flying stone protection net mechanism is installed on the top of the rammer body.

[0009] The flying stone protection net mechanism comprises an annular fixing rod, on which a plurality of protection rods are hinged;

[0010] A fan-shaped area is formed between adjacent protection rods, and a spring net is fixedly connected in the fan-shaped area; the spring net includes a plurality of protection springs with gradient length distribution; the protection springs are used to protect and block flying stones during the ramming process;

[0011] The bottom of the annular fixing rod is fixedly connected to the top of the rammer body through a column, and the columns are distributed between adjacent protective rods.

[0012] Preferably, a hanging seat is fixedly connected to the top of the rammer body.

[0013] Preferably, the rammer body is provided with a plurality of exhaust structures;

[0014] During the compaction process into the ground, exhaust is exhausted through the exhaust structure.

[0015] Preferably, the exhaust structure includes a plurality of exhaust cavities provided on the rammer body;

[0016] An exhaust long pipe is arranged in the exhaust cavity, and the exhaust long pipe is slidably connected to the exhaust cavity;

[0017] The bottom of the long exhaust pipe is positioned by a lower positioning structure, and the top of the long exhaust pipe is positioned by an upper positioning structure.

[0018] Preferably, the lower positioning structure includes a nut groove provided at the bottom of the rammer body; the bottom of the exhaust cavity is located at the top of the nut groove;

[0019] The bottom of the long exhaust pipe is threadedly connected with a lower nut, the lower nut is matched with the nut groove, and the bottom of the lower nut is flush with the bottom of the nut groove.

[0020] Preferably, the top of the exhaust long pipe protrudes from the top of the exhaust cavity;

[0021] The upper positioning structure comprises an upper nut threadedly connected to the top of the long exhaust pipe.

[0022] Preferably, an elastic impact cone structure is assembled and connected to the bottom center of the rammer body.

[0023] Preferably, an inner sinking groove is provided at the bottom center of the rammer body;

[0024] The elastic impact cone structure comprises an impact cone which is limitedly slidable in the inner sink groove;

[0025] The cone tip of the impact cone is arranged downward, and the top of the impact cone is slidably mounted on the rammer body through a plurality of spring members.

[0026] Preferably, the spring member comprises a slide bar slidably connected to the rammer body, and the bottom of the slide bar is fixedly connected to the top of the impact cone;

[0027] A reinforcing spring is sleeved on the slide bar, and two ends of the reinforcing spring are respectively fixedly connected to the top of the impact cone and the top position of the inner sinking groove.

[0028] Preferably, the dynamic compaction method includes the following:

[0029] S1, during the tamping process, the impact cone protruding from the bottom of the rammer body first hits the ground and in this way, the impact cone achieves an increased tamping effect;

[0030] S2, using impact cones to crush hard materials such as stones in the soil layer;

[0031] S3, during this process, the impact cone 3 shrinks into the inner sink groove at the moment of impact, and the slide bar shrinks into the slide bar cavity;

[0032] S4, when the reinforcing spring is compressed to the minimum length, the sharp part of the impact cone is still located on the outside of the inner groove.

[0033] The present invention has the following beneficial effects:

[0034] 1. When the rammer is descending, the air resistance is very small due to the mesh structure of the spring net, which does not affect the rammer's descending speed and trajectory. At the same time, due to the free acceleration of the rammer, under the action of inertia, all the protective rods will be properly flipped upward with the protective springs connected to them (with the annular fixed rod as the fulcrum) to form a structure similar to an inverted umbrella, thereby further reducing resistance.

[0035] When the rammer hits the ground, at this time, under the cooperation of inertia, the flying stone protection net mechanism will flip downward to an open state. In the expanded state, a spring net cover is formed, and the flying stones generated by the impact hit the spring net structure. Under the protection of the spring net, the kinetic energy of the flying stones is successfully reduced, thereby greatly reducing the destructiveness of the flying stones.

[0036] 2. Positioning is achieved through the upper nut and the lower nut. Once the exhaust long pipe is blocked, the upper nut and the lower nut are loosened, and the exhaust long pipe is separated from the exhaust cavity, making it easier to drain the blocked mud from the exhaust long pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0038] Figure 1Schematic diagram of the dispersed structure in an embodiment of the present invention;

[0039] Figure 2 It is a structural schematic diagram of a flying rock protection net mechanism in an embodiment of the present invention;

[0040] Figure 3 It is a structural schematic diagram of the elastic impact cone structure in an embodiment of the present invention;

[0041] Figure 4 Schematic diagram of the structure of the lower nut in the nut groove in the embodiment of the present invention;

[0042] Figure 5 Schematic diagram of the structure of the exhaust cavity in the embodiment of the present invention;

[0043] Figure 6 Schematic diagram of the overall structure of the embodiment of the present invention.

[0044] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] Example 1

[0049] like Figure 1-6As shown, a large-tonnage tamping construction method includes a tamping device and a tamping method. The device includes a tamping hammer body 1, which has the same structure as the existing tamping hammer body 1. A hanging seat 11 is fixedly connected to the top of the tamping hammer body 1. During operation, the hanging seat cooperates with a decoupler on the heavy tamping hammer to achieve the hook on the decoupler being pulled and hung on the bottom of the hanging seat 11. During the decoupling process, the hook on the decoupler flips over and detaches from the bottom of the hanging seat 11.

[0050] In order to prevent flying stones from splashing and causing harm to people and equipment and causing safety accidents during the tamping process, a flying stone protection net mechanism 2 is installed on the top of the tamping hammer body 1.

[0051] Specifically, the flying stone protection net mechanism 2 comprises an annular fixing rod 21, and a plurality of protection rods 22 are hingedly connected to the annular fixing rod 21. The protection rods 22 are distributed in an annular array, so that a fan-shaped area is formed between adjacent protection rods 22.

[0052] A spring net is fixedly connected in the fan-shaped area; the spring net includes a plurality of protection springs 23 with gradient length distribution. The protection springs 23 are used to protect and block flying stones during the ramming process.

[0053] Meanwhile, the bottom of the annular fixing rod 21 is fixedly connected to the top of the rammer body 1 through columns, and the columns are distributed between adjacent protection rods 22 .

[0054] The above structure realizes that when the rammer is descending, the air resistance is very small due to the mesh structure of the spring net, which does not affect the descending speed and trajectory of the rammer. At the same time, due to the free acceleration of the rammer, under the action of inertia, all the protective rods 22 will be appropriately flipped upwards (with the annular fixing rod 21 as the fulcrum) by the protective springs 23 connected to them to form a structure similar to an inverted umbrella, thereby further reducing the resistance.

[0055] When the rammer hits the ground, at this time, under the cooperation of inertia, the flying stone protection net mechanism 2 will flip downward to an open state, and in the expanded state, a spring net cover is formed, and the flying stones generated by the impact hit the spring net structure. Under the protection of the spring net, the kinetic energy of the flying stones is successfully reduced, thereby greatly reducing the destructiveness of the flying stones.

[0056] Example 2

[0057] like Figure 1-6 As shown, in this embodiment, based on the structure of embodiment 1, the rammer body 1 is provided with several exhaust structures. The exhaust structures are used to exhaust gas when the rammer hits the ground to form a pit.

[0058] Specifically, the exhaust structure includes a plurality of exhaust cavities 411 provided on the rammer body 1. In actual working process, since the exhaust cavities 411 are often filled with soil, which is difficult to clean after being filled, specifically, the rammer itself has a certain height, and heavy ramming causes the soil to be filled very tightly, which is difficult to clean later.

[0059] Therefore, an exhaust long pipe 41 is provided in the exhaust cavity 411, and the exhaust long pipe 41 is slidably connected to the exhaust cavity 411; the bottom of the exhaust long pipe 41 is positioned by a lower positioning structure, and the top of the exhaust long pipe 41 is positioned by an upper positioning structure.

[0060] The lower positioning structure includes a nut slot at the bottom of the rammer body 1; the bottom of the exhaust cavity 411 is located at the top of the nut slot; the bottom of the exhaust long pipe 41 is threadedly connected with a lower nut 42, the lower nut 42 cooperates with the nut slot, and the bottom of the lower nut 42 is flush with the bottom of the nut slot. The top of the exhaust long pipe 41 protrudes from the top of the exhaust cavity 411; the upper positioning structure includes an upper nut 412 threadedly connected to the top of the exhaust long pipe 41.

[0061] In the above manner, positioning is achieved by the upper nut 412 and the lower nut 42. Once the exhaust long pipe 41 is blocked, the upper nut and the lower nut 42 are loosened, and the exhaust long pipe 41 is separated from the exhaust cavity 411, so that the mud blocking the exhaust long pipe 41 can be easily drained.

[0062] Example 3

[0063] like Figure 1-6 As shown, based on the structure of Example 2, in order to increase the tamping depth of the tamped soil layer and increase the tamping effect such as the depth of the tamping pit during the heavy tamping process, the bottom center of the tamping hammer body 1 is equipped with an elastic impact cone structure. An inner sinking groove A is provided at the bottom center of the tamping hammer body 1;

[0064] The elastic impact cone structure includes an impact cone 31 that slides within the inner groove A; the height of the impact cone 31 is greater than the height of the inner groove A, and the impact cone 31 is conical in shape, and the radius of the top surface is equal to the groove radius of the inner groove A of the cylindrical structure.

[0065] The cone tip of the striker 31 is downwardly arranged, and the top of the striker 31 is slidably mounted on the rammer body 1 through a plurality of spring members. The spring member comprises a slide bar slidably connected to the rammer body 1 (an adapted slide bar cavity is provided on the rammer body 1), and the bottom of the slide bar is fixedly connected to the top of the striker 31; a reinforcing spring 33 is sleeved on the slide bar 32, and the two ends of the reinforcing spring 33 are respectively fixedly connected to the top of the striker 31 and the top position of the inner sink groove A.

[0066] During the tamping process, the impact cone 31 protruding from the bottom of the rammer body 1 first hits the ground and in this way, the impact cone 31 achieves an increased tamping effect, such as crushing hard materials such as stones in the soil layer through the impact cone 31. In this process, the impact cone 31 shrinks into the inner sink groove A at the moment of impact, and the slide bar 32 shrinks into the slide rod cavity. When the reinforcing spring 33 is compressed to the minimum length, the sharp part of the impact cone 31 is still located outside the inner sink groove A.

[0067] When the rammer is descending, the air resistance is very small due to the mesh structure of the spring net, which does not affect the rammer's descending speed and trajectory. At the same time, due to the free acceleration of the rammer, under the action of inertia, all the protective rods will flip upward appropriately with the protective springs connected to them (with the annular fixed rod as the fulcrum) to form a structure similar to an inverted umbrella, thereby further reducing resistance.

[0068] When the rammer hits the ground, at this time, under the cooperation of inertia, the flying stone protection net mechanism will flip downward to an open state. In the expanded state, a spring net cover is formed, and the flying stones generated by the impact hit the spring net structure. Under the protection of the spring net, the kinetic energy of the flying stones is successfully reduced, thereby greatly reducing the destructiveness of the flying stones.

[0069] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A large-tonnage dynamic tamping construction method, characterized in that: The invention comprises a dynamic compaction device and a dynamic compaction method, wherein the device comprises a rammer body, and a flying stone protection net mechanism is installed on the top of the rammer body; The flying stone protection net mechanism comprises an annular fixing rod, on which a plurality of protection rods are hinged; A fan-shaped area is formed between adjacent protection rods, and a spring net is fixedly connected in the fan-shaped area; the spring net includes a plurality of protection springs with gradient length distribution; the protection springs are used to protect and block flying stones during the ramming process; The bottom of the annular fixing rod is fixedly connected to the top of the rammer body through a column, and the columns are distributed between adjacent protective rods.

2. A large-tonnage dynamic tamping construction method according to claim 1, characterized in that: The top of the rammer body is fixedly connected with a hanging seat.

3. A large-tonnage dynamic tamping construction method according to claim 1, characterized in that: The rammer body is provided with a plurality of exhaust structures; During the compaction process into the ground, exhaust is exhausted through the exhaust structure.

4. A large-tonnage dynamic tamping construction method according to claim 3, characterized in that: The exhaust structure includes a plurality of exhaust cavities provided on the rammer body; An exhaust long pipe is arranged in the exhaust cavity, and the exhaust long pipe is slidably connected to the exhaust cavity; The bottom of the long exhaust pipe is positioned by a lower positioning structure, and the top of the long exhaust pipe is positioned by an upper positioning structure.

5. A large-tonnage dynamic tamping construction method according to claim 4, characterized in that: The lower positioning structure includes a nut groove provided at the bottom of the rammer body; the bottom of the exhaust cavity is located at the top of the nut groove; The bottom of the long exhaust pipe is threadedly connected with a lower nut, the lower nut is matched with the nut groove, and the bottom of the lower nut is flush with the bottom of the nut groove.

6. A large-tonnage dynamic tamping construction method according to claim 4, characterized in that: The top of the exhaust long pipe protrudes from the top of the exhaust cavity; The upper positioning structure comprises an upper nut threadedly connected to the top of the long exhaust pipe.

7. A large-tonnage dynamic tamping construction method according to claim 1, characterized in that: An elastic impact cone structure is assembled and connected at the bottom center of the rammer body.

8. A large-tonnage dynamic tamping construction method according to claim 7, characterized in that: An inner sinking groove is provided at the bottom center of the rammer body; The elastic impact cone structure comprises an impact cone which is limitedly slidable in the inner sink groove; The cone tip of the impact cone is arranged downward, and the top of the impact cone is slidably mounted on the rammer body through a plurality of spring members.

9. A large-tonnage dynamic tamping construction method according to claim 8, characterized in that: The spring member comprises a slide bar slidably connected to the rammer body, and the bottom of the slide bar is fixedly connected to the top of the impact cone; A reinforcing spring is sleeved on the slide bar, and two ends of the reinforcing spring are respectively fixedly connected to the top of the impact cone and the top position of the inner sinking groove.

10. A large-tonnage dynamic tamping construction method according to claim 9, characterized in that: The dynamic compaction methods include the following: S1, during the tamping process, the impact cone protruding from the bottom of the rammer body first hits the ground and in this way, the impact cone achieves an increased tamping effect; S2, using impact cones to crush hard materials such as stones in the soil layer; S3, during this process, the impact cone 3 shrinks into the inner sink groove at the moment of impact, and the slide bar shrinks into the slide bar cavity; S4, when the reinforcing spring is compressed to the minimum length, the sharp part of the impact cone is still located on the outside of the inner groove.

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