Dynamic compaction device for reinforcing shallow silt backfill and construction method thereof

Abstract

The application discloses a dynamic compaction device for reinforcing shallow silt backfill and a construction method thereof, and relates to the technical field of foundation compaction. The dynamic compaction device comprises a dynamic compaction machine, wherein the dynamic compaction machine comprises a crane and a heavy hammer; a sleeve is arranged on one side of the crane; the heavy hammer is arranged in the sleeve in a sliding mode; a conveying mechanism for conveying backfill soil into the sleeve is arranged on the crane; a scraper for scraping the backfill soil is movably arranged in the sleeve; a rotating mechanism for driving the scraper to rotate and scrape is arranged on the sleeve; and a receiving mechanism for receiving the scraper is further arranged on the sleeve. The application can improve the compaction effect of the dynamic compaction machine on the backfill soil.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation ramming, in particular to a strong ramming device for reinforcing shallow silt backfill and a construction method thereof. BACKGROUND

[0002] It is known that due to the layout of the project, the port terminal, the river dam, the dam sea embankment and the river channel bank are built on the silt foundation. The designers of the silt foundation all take different engineering measures according to the actual soil conditions of the site and the characteristics and technical requirements of the building. Generally speaking, the commonly used soil reinforcement methods include pile-up and vacuum preloading method, drainage consolidation method, soil pile method, strong ramming method, pressure grouting method, deep mixing method, powder jet pile method, pine pile method and the like.

[0003] When the strong ramming method is used for construction of the silt foundation, the ground needs to be first treated by ramming using a strong rammer, and the materials with good performance such as gravel, stone chips and slag are strongly squeezed into the foundation by using the high impact energy generated by the high drop of the weight, at this time the place on the ground hit by the weight forms a pit; then the backfill is poured into the pit using a shovel, and the newly added backfill is compacted by ramming using the strong rammer.

[0004] According to the related technology in the above, the inventors believe that there are the following defects: when the shovel pours the backfill into the pit, the distribution of the backfill in the pit is uneven, when the weight of the strong rammer falls into the pit, the weight first contacts the backfill of the protruding part, and the contact between the protruding backfill and the weight changes the falling direction of the weight, so that the falling direction of the weight in the pit is no longer vertical, which leads to a large difference in the ramming force of the weight on the backfill in the pit, and the compaction degree of the backfill in the pit is greatly different, thereby leading to poor compaction effect of the strong rammer on the backfill. SUMMARY

[0005] In order to improve the problem of poor compaction effect of the strong rammer on the backfill, the present application provides a strong ramming device for reinforcing shallow silt backfill and a construction method thereof.

[0006] In the first aspect, the present application provides a strong ramming device for reinforcing shallow silt backfill, which adopts the following technical scheme:

[0007] A strong ramming device for reinforcing shallow silt backfill, comprising a strong rammer, the strong rammer comprising a crane and a weight, a sleeve being installed on one side of the crane, the weight being slidingly arranged in the sleeve, a conveying mechanism being arranged on the crane for conveying backfill into the sleeve, a scraper being movably arranged in the sleeve for scraping the backfill, a rotating mechanism being arranged on the sleeve for rotating the scraper, and a receiving mechanism being further arranged on the sleeve for receiving the scraper.

[0008] By adopting the technical scheme, when the backfill soil is reinforced, the crane is started first, the weight is lifted to a certain height by the crane, and then the weight is allowed to freely fall in the sleeve, and the weight strikes the ground to form a pit. The weight is lifted again, the backfill soil is filled into the pit in the sleeve through the conveying mechanism, and then the rotating mechanism is started, the rotating mechanism drives the scraper to rotate, so that the scraper sweeps and flattens the backfill soil in the pit as much as possible. After the sweeping of the backfill soil is completed, the rotating mechanism is paused, the storage mechanism is started, and the scraper is stored. The crane is started again, so that the weight freely falls at a certain height. Since the surface layer of the backfill soil is relatively flat, the weight can vertically ram the backfill soil, and the compaction degree of the backfill soil in the pit is small, thereby improving the poor compaction effect of the dynamic compactor on the backfill soil.

[0009] Optionally, the rotating mechanism comprises a support plate arranged in the sleeve, a rotating ring rotatably arranged on the support plate, and a driving assembly for driving the rotating ring to rotate, the rotating ring is fixedly connected with a connecting rod, the connecting rod is arranged along the radial direction of the rotating ring, and the scraper is mounted on the connecting rod.

[0010] By adopting the technical scheme, the support plate rotatably arranges the rotating ring in the sleeve, when it is necessary to sweep the surface of the backfill soil in the pit, the driving assembly is started, the driving assembly drives the rotating ring to rotate, the rotating ring drives the connecting rod to rotate, and the connecting rod drives the scraper to rotate. The rotating scraper can rotate and sweep the backfill soil in the pit, so that the surface layer of the backfill soil is relatively flat, the weight can vertically ram the backfill soil, and the compaction degree of the backfill soil in the pit is small, thereby improving the poor compaction effect of the dynamic compactor on the backfill soil.

[0011] Optionally, the storage mechanism comprises an inner casing coaxially and fixedly connected in the sleeve, a lifting assembly for driving the support plate to slide along the length direction of the sleeve, and a hinged rod hingedly connected with the connecting rod, the height of the inner casing close to the ground is higher than the height of the sleeve close to the ground, the weight is located in the inner casing, a torsional spring is arranged at the hinge joint of the hinged rod and the connecting rod, the lifting assembly, the rotating mechanism, the connecting rod and the torsional spring are located between the inner casing and the sleeve, and the scraper is mounted on the connecting rod through the hinged rod.

[0012] When the rotating ring is located on the side close to the ground of the inner casing, the connecting rod and the hinged rod are coaxially arranged, and the distance from the end of the hinged rod away from the connecting rod to the axis of the inner casing is less than the radius size of the inner casing.

[0013] When the backfill soil needs to be scraped, the lifting assembly is started, and the lifting assembly drives the support plate to move towards the ground. When the support plate drives the connecting rod and the hinged rod to move to the side of the inner protection cylinder close to the ground, the hinged rod is driven by the torsional spring to rotate around one end of the connecting rod to a position parallel to the connecting rod. At this time, the scraper is perpendicular to the ground away from one end of the hinged rod, and the scraper is located in the pit. Continue to start the lifting assembly, and when the lifting assembly drives the scraper to abut against the ground, stop starting the lifting assembly. Then start the rotating mechanism, and the rotating mechanism drives the scraper to rotate, thereby achieving scraping of the backfill soil.

[0014] After the scraping of the backfill soil is completed, the lifting assembly is started, and the lifting assembly drives the support plate to move away from the ground. When the support plate drives the connecting rod and the hinged rod to move to the bottom end of the inner protection cylinder, the lifting assembly continues to drive the connecting rod to move away from the ground. At this time, the hinged rod drives the scraper to rotate around one end of the connecting rod under the abutting action of the bottom end of the inner protection cylinder. With the starting of the lifting assembly, the support plate, the rotating ring, the connecting rod, the hinged rod and the scraper are all stored in the gap between the inner protection cylinder and the sleeve, so that the scraper does not affect the free falling of the weight, and the weight can vertically ram the backfill soil, thereby improving the poor compaction effect of the dynamic compactor on the backfill soil.

[0015] Optionally, the hinged rod is provided with an elastic telescopic rod, the elastic telescopic rod is arranged in an elastic telescopic manner along the radial direction of the hinged rod, and the scraper is movably connected to the hinged rod through the elastic telescopic rod.

[0016] By adopting the above technical scheme, the elastic telescopic rod elastically connects the scraper to the hinged rod, so that when the lifting assembly drives the scraper to move towards the ground, the scraper can elastically abut against the ground, reducing the impact of the scraper on the hinged rod. At the same time, when the scraper rotates to scrape the backfill soil, the elastic telescopic rod can appropriately extend and contract according to the height of the backfill soil, thereby improving the scraping effect of the scraper on the backfill soil.

[0017] Optionally, the scraper is provided with a soil blocking strip, and the soil blocking strip is located on the side of the scraper close to the connecting rod.

[0018] By adopting the above technical scheme, the arrangement of the soil blocking strip can reduce the overflow of the backfill soil away from the center of the pit at the soil-facing surface of the scraper, and the backfill soil is as much as possible to be accumulated within the range of the weight ramming, thereby improving the utilization rate of the backfill soil.

[0019] Optionally, the conveying mechanism comprises a belt line rotatably arranged on the crane, an inclined guide plate located at an end of the belt line, a material guide plate connected with the inclined guide plate, and a connecting plate for rotatably connecting the inclined guide plate and the material guide plate, the sleeve is provided with a material conveying opening on a side close to the belt line, the material conveying opening is located on a side of the inner casing close to the ground, the inclined guide plate is obliquely arranged at an end of the belt line close to the material conveying opening, the rotatable connection between the inclined guide plate and the material guide plate is located on an outer side of the sleeve, the material guide plate is located in the sleeve, and the sleeve is provided with a folding assembly for folding the material guide plate into a gap between the sleeve and the inner casing.

[0020] When the inclined guide plate is parallel to the material guide plate, a distance from an end of the material guide plate away from the connecting plate to a central axis of the inner casing is less than a radius of the inner casing.

[0021] By adopting the above technical scheme, when the backfill soil is conveyed into the pit in the inner casing, the backfill soil can be first poured on the belt line, the belt line transmits the backfill soil towards the weight, and the backfill soil on the belt line falls on the inclined guide plate. With the inclined direction of the inclined guide plate, the backfill soil slides to the material guide plate through the connecting plate, and the backfill soil on the material guide plate slides into the pit under the guidance of the material guide plate, thereby achieving the purpose of automatically conveying the backfill soil into the pit. After the automatic conveying of the backfill soil is completed, the folding assembly is started, and the folding assembly folds the material guide plate into the gap between the sleeve and the inner casing, thereby facilitating the free vertical falling of the weight.

[0022] Optionally, the folding assembly comprises a driving plate movably arranged between the sleeve and the inner casing, and a power assembly for driving the driving plate to slide along the length direction of the sleeve, the driving plate is provided with an elongated through hole, the length direction of the through hole is consistent with the sliding direction of the driving plate, and the material guide plate is arranged through the through hole.

[0023] By adopting the above technical scheme, when the automatic feeding of the backfill soil is completed, the material guide plate needs to be folded into the gap between the sleeve and the inner casing, thereby facilitating the free vertical falling of the weight. At this time, only the power assembly needs to be started, and the power assembly drives the driving plate to move away from the ground. Since the material guide plate is arranged through the through hole on the driving plate and is rotatably connected with the inclined guide plate, the material guide plate rotates around one end of the inclined guide plate under the driving of the driving plate, and then the end of the material guide plate away from the inclined guide plate rotates out of the inner casing. The rotated material guide plate does not affect the free vertical falling of the weight, so that the weight can vertically ram the backfill soil, thereby improving the poor ramming effect of the dynamic compactor on the backfill soil.

[0024] In a second aspect, the application provides a construction method for reinforcing shallow silt backfill soil, which adopts the following technical scheme:

[0025] A construction method for reinforcing shallow muddy backfill soil, based on the above-mentioned dynamic compaction device for reinforcing shallow muddy backfill soil, comprises the following steps:

[0026] S1, Construction Preparation: Clear the surface debris of the construction site and level the earth mounds and low-lying pits in the site to the same elevation;

[0027] S2, area division: positioning and laying out the lines in the project site, setting up coordinate points, and forming a grid-like compaction area;

[0028] S3, first compaction: using a dynamic compactor to compact the compacted area in a row-by-row and grid-by-grid order, compacting the same area multiple times to form pits;

[0029] S4, second compaction: compact the compacted area again row by row using a dynamic compactor. After compacting one grid of the compacted area in each row, the next compaction position is staggered with the previous compaction area by half.

[0030] S5, backfilling: add backfill soil into the pit and level the surface of the backfill soil, repeating the above steps S3 and S4 until the tamping amount meets the specification requirements.

[0031] By adopting the above technical solution, the construction site is first cleaned, then the compaction area is determined by laying out the lines. The compaction area is then compacted using a dynamic compactor. After completing two compaction passes, backfill soil is added to the pit in a fixed amount and the surface of the backfill soil is leveled to ensure that the backfill soil surface is as flat as possible. After the backfill soil is added and leveled, the dynamic compactor is restarted. The dynamic compactor's hammer falls freely vertically, allowing the hammer to vertically compact the backfill soil. As a result, the backfill soil density varies little in different parts of the pit, improving the problem of poor compaction effect of the dynamic compactor on the backfill soil.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. Lift the heavy hammer and fill the backfill soil into the pit in the sleeve through the conveying mechanism, then start the rotating mechanism. The rotating mechanism drives the scraper to rotate, so that the scraper can scrape the backfill soil in the pit as flat as possible. After completing the scraping of the backfill soil, pause the rotating mechanism and start the storage mechanism to store the scraper. Start the crane again, so that the heavy hammer falls freely at a certain height. Since the surface of the backfill soil is relatively flat, the heavy hammer can tamp the backfill soil vertically, so that the density of the backfill soil in different places in the pit is small, which improves the problem of poor compaction effect of the dynamic tamping machine on the backfill soil;

[0034] 2. The elastic telescopic rod elastically connects the scraper to the articulated rod, so that when the lifting assembly drives the scraper to move towards the ground, the scraper can elastically abut on the ground, reducing the impact of the scraper on the articulated rod. At the same time, when the scraper rotates to sweep the backfill soil, the elastic telescopic rod can appropriately stretch and contract according to the height of the backfill soil, thereby improving the scraping effect of the scraper on the backfill soil.

[0035] 3. The arrangement of the soil retaining bar can reduce the overflow of the backfill soil at the soil-facing surface of the scraper towards the direction away from the center of the pit, so as to make the backfill soil accumulate in the range of the rammer compaction as much as possible, thereby improving the utilization rate of the backfill soil. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is the overall structure schematic diagram of the dynamic compaction device for reinforcing the shallow silt backfill soil in the embodiment of the present application.

[0037] Figure 2 is the structure schematic diagram of the crane, the rammer, the inclined guide plate, the material guide plate, the connecting plate and the belt line in the embodiment of the present application.

[0038] Figure 3 is the sectional structure schematic diagram of the sleeve in the embodiment of the present application, mainly used for showing the scraper, the rotating mechanism and the storage mechanism.

[0039] Figure 4 is the structure schematic diagram of the inclined guide plate, the material guide plate, the connecting plate, the driving plate and the power assembly in the embodiment of the present application.

[0040] Figure 5 is the sectional structure schematic diagram of the inner casing in the embodiment of the present application, mainly used for showing the inner casing, the lifting assembly and the articulated rod.

[0041] Figure 6 is the structure schematic diagram of the scraper, the support plate, the rotating ring, the driving assembly, the lifting assembly, the articulated rod, the connecting rod and the elastic telescopic rod in the embodiment of the present application.

[0042] Figure 7 is the flowchart schematic diagram of the construction method for reinforcing the shallow silt backfill soil in the embodiment of the present application.

[0043] Label: 1, sleeve; 2, dynamic compactor; 21, crane; 22, weight; 3, conveying mechanism; 31, inclined guide plate; 32, guide plate; 33, connecting plate; 34, belt line; 4, scraper; 5, rotating mechanism; 51, support plate; 52, rotating ring; 53, driving assembly; 531, gear; 532, third motor; 6, storage mechanism; 61, inner protection cylinder; 62, lifting assembly; 621, second lead screw; 622, second motor; 623, guide rod; 63, hinged rod; 7, connecting rod; 8, elastic telescopic rod; 9, soil retaining bar; 10, conveying port; 11, driving plate; 12, power assembly; 121, first lead screw; 122, first motor; 123, first sliding block; 13, through hole; 14, soil guide plate. DETAILED DESCRIPTION

[0044] The following will be described in detail in combination with the accompanying drawings. Figures 1-7 The application is further described in detail.

[0045] The embodiment of the application discloses a dynamic compactor for reinforcing shallow silt backfill.

[0046] Referring to Figure 1 and Figure 3 The dynamic compactor for reinforcing shallow silt backfill comprises a dynamic compactor 2, the dynamic compactor 2 comprises a crane 21 and a weight 22, a sleeve 1 is installed on one side of the crane 21 through a support, the sleeve 1 is vertically arranged, and the weight 22 is slidably arranged in the sleeve 1 by a sling of the crane 21. The sleeve 1 is provided with a conveying port 10 on the side close to the crane 21, and the crane 21 is provided with a conveying mechanism 3 for conveying backfill into the sleeve 1 through the conveying port 10. The conveying mechanism 3 conveys the backfill into a pit formed by ramming of the weight 22, the sleeve 1 is movably provided with a scraper 4 for scraping the backfill, so that the backfill in the pit is compacted to a similar degree, and the sleeve 1 is provided with a rotating mechanism 5 for driving the scraper 4 to rotate and sweep, so that the weight 22 can vertically fall freely, and the sleeve 1 is further provided with a storage mechanism 6 for storing the scraper 4.

[0047] Referring to Figure 2 and Figure 3The conveying mechanism 3 comprises a belt line 34 rotatably arranged on the crane 21, an inclined guide plate 31 arranged at the end of the belt line 34, a guide plate 32 connected with the inclined guide plate 31, and a connecting plate 33 for rotatably connecting the inclined guide plate 31 and the guide plate 32. The belt line 34 is rotatably arranged at the bottom of the crane 21, and the belt line 34 is above the material conveying port 10. The inclined guide plate 31 is welded and fixed on the shell of the crane 21, and the inclined guide plate 31 is arranged at the end of the belt line 34 close to the material conveying port 10 and is inclined towards the material conveying port 10. The connecting plate 33 is connected at the end of the inclined guide plate 31 away from the belt line 34, and the inclined guide plate 31 and the connecting plate 33 are both outside the sleeve 1. The guide plate 32 is fixedly connected at the end of the connecting plate 33 away from the inclined guide plate 31, and the guide plate 32 is inside the sleeve 1. When the inclined guide plate 31 and the guide plate 32 are parallel, the end of the guide plate 32 away from the inclined guide plate 31 is directly above the pit.

[0048] In order to avoid the influence of the guide plate 32 on the free vertical falling of the weight 22 as much as possible, the guide plate 32 is rotatably connected with the inclined guide plate 31, so in one possible embodiment, the connecting plate 33 is made of rubber material, and the guide plate 32 and the inclined guide plate 31 are both fixedly connected with the two ends of the connecting plate 33 by rivets. In another possible embodiment, the connecting plate 33 is made of steel material, and one end of the connecting plate 33 is hingedly connected with the inclined guide plate 31, and the other end is fixedly connected with the guide plate 32 by screws. When it is needed to convey the backfill soil, the end of the guide plate 32 close to the connecting plate 33 is loaded on the inner wall at the bottom of the material conveying port 10, at this time, the guide plate 32 is arranged in parallel with the inclined guide plate 31, and the backfill soil on the belt line 34 can slide along the inclined guide plate 31, the connecting plate 33 and the guide plate 32 in turn to the pit. When it is not needed to convey the backfill soil, the guide plate 32 can be driven to rotate around the inclined guide plate 31, so that the end of the guide plate 32 away from the inclined guide plate 31 is rotated to outside the pit, thereby facilitating the free vertical falling of the weight 22.

[0049] In order to automatically drive the guide plate 32 to rotate, with reference to Figure 3 and Figure 4The sleeve 1 is provided with a superposition assembly, which comprises a driving plate 11 movably arranged in the sleeve 1 and a power assembly 12 for driving the driving plate 11 to slide along the length direction of the sleeve 1. The power assembly 12 comprises a first screw rod 121 rotatably arranged on the inner wall of the sleeve 1, a first motor 122 for driving the first screw rod 121 to rotate, and a first sliding block 123 threadedly arranged on the first screw rod 121. The length direction of the first screw rod 121 is consistent with the length direction of the sleeve 1. The first motor 122 is fixedly connected to the inner wall of the sleeve 1, and the output shaft of the first motor 122 is coaxially fixedly connected to one end of the first screw rod 121. The first sliding block 123 is slidably arranged against the inner wall of the sleeve 1. The driving plate 11 is fixedly connected to the first sliding block 123 by means of screws. The first screw rod 121 can drive the driving plate 11 to reciprocatingly slide along the length direction of the sleeve 1 through the first sliding block 123. A long strip-shaped through hole 13 is formed in the driving plate 11, and the length direction of the through hole 13 is consistent with the sliding direction of the driving plate 11. The guide plate 32 is arranged through the through hole 13.

[0050] When it is needed to drive the guide plate 32 to rotate around one end of the inclined guide plate 31, the first motor 122 is started to drive the first screw rod 121 to rotate. The rotating first screw rod 121 drives the driving plate 11 to slide through the first sliding block 123. The driving plate 11 drives the guide plate 32 to rotate around one end of the inclined guide plate 31 in a direction away from the ground through the bottom wall of the through hole 13. The end of the guide plate 32 away from the inclined guide plate 31 is rotated in a direction away from the pit, so that the projection of the guide plate 32 on the ground is located outside the pit. At this time, the guide plate 32 does not hinder the free vertical falling of the weight 22, which guarantees the vertical ramming of the weight 22 on the backfill soil in the pit and improves the ramming effect of the dynamic compactor 2 on the backfill soil.

[0051] After the folding of the guide plate 32 is completed, the rotating mechanism 5 can be started to drive the scraper 4 to sweep the backfill soil in the pit, so that the surface layer of the backfill soil is as flat as possible. Referring to Figure 5 and Figure 6 The rotating mechanism 5 comprises a support plate 51 arranged in the sleeve 1, a rotating ring 52 rotatably arranged on the support plate 51, and a driving assembly 53 for driving the rotating ring 52 to rotate. The support plate 51 is arranged in the sleeve 1 to slide up and down along the length direction of the sleeve 1, and the support plate 51 coaxially rotatably arranges the rotating ring 52 in the sleeve 1. In order to stably arrange the rotating ring 52, two support plates 51 are arranged in the embodiment, and the connecting direction of the two support plates 51 is consistent with the radial direction of the sleeve 1.

[0052] Referring to Figure 5 and Figure 6The driving assembly 53 comprises a gear 531 rotatably arranged on the support plate 51 and a third motor 532 for driving the gear 531 to rotate. In the embodiment, the rotating ring 52 is arranged as a toothed ring. In order to stably rotate the rotating ring 52 in the sleeve 1, two gears 531 are arranged, and the two gears 531 correspond to the two support plates 51 respectively. The two gears 531 are adapted to engage with the two sides of the toothed ring respectively, so that the toothed ring is stably arranged between the two gears 531. The third motor 532 is installed on one of the support plates 51 through a motor support, and the output end of the third motor 532 is coaxially fixedly connected with one of the gears 531.

[0053] With reference to Figure 5 and Figure 6 The inner wall of the rotating ring 52 is fixedly connected with a connecting rod 7. The connecting rod 7 can be one or multiple. In the embodiment, two connecting rods 7 are arranged. The two connecting rods 7 are arranged along the radial direction of the rotating ring 52, and the connecting line direction of the two connecting rods 7 is consistent with the radial direction of the rotating ring 52.

[0054] With reference to Figure 5 and Figure 6 The scraper 4 is provided with two, and the two scrapers 4 correspond to the two connecting rods 7 respectively. The scraper 4 is installed on the connecting rod 7. When the driving assembly 53 drives the connecting ring to rotate, the connecting ring drives the two connecting rods 7 to rotate, and the rotating connecting rod 7 drives the scraper 4 to rotate and sweep the backfill soil, so as to realize the leveling treatment of the surface layer of the backfill soil. In order to realize the full use of the backfill soil, the scraper 4 is riveted with a soil retaining strip 9 through a rivet. The soil retaining strip 9 is located on the side of the scraper 4 close to the connecting rod 7, and the soil retaining strip 9 is located on the side of the scraper 4 facing the soil. The arrangement of the soil retaining strip 9 can reduce the overflow of the backfill soil on the soil-facing side of the scraper 4 away from the center of the pit, and the backfill soil is accumulated in the range of the ramming of the weight 22 as much as possible, so as to improve the utilization rate of the backfill soil. In order to further accelerate the flow of the backfill soil towards the center of the pit, the soil-facing side of the scraper 4 is also riveted with a soil guide plate 14. The end of the soil guide plate 14 away from the connecting rod 7 is arranged to be inclined towards the ground. The height of the end of the soil guide plate 14 close to the connecting rod 7 is lower than the height of the soil retaining strip 9. When a large amount of backfill soil is accumulated on the soil-facing side of the scraper 4, the backfill soil quickly slides towards the center of the pit under the guidance of the soil guide plate 14.

[0055] After the sweeping and leveling of the backfill soil are completed, the storage mechanism 6 is started, the storage mechanism 6 stores the scraper 4, so that the weight 22 can freely fall vertically, and the backfill soil is vertically rammed. With reference to Figure 5 and Figure 6The accommodating mechanism 6 comprises an inner sleeve 61 coaxially fixed in the sleeve 1, a lifting assembly 62 for driving the support plates 51 to slide along the length direction of the sleeve 1, and a hinged rod 63 hingedly connected with the connecting rods 7. The inner sleeve 61 is stably and coaxially fixed in the sleeve 1 by a support rod, the weight 22 is located in the inner sleeve 61, the height of the inner sleeve 61 near the ground is higher than the height of the sleeve 1 near the ground, and the feeding port 10 is located on the side of the inner sleeve 61 near the ground.

[0056] With reference to Figure 5 and Figure 6 The lifting assembly 62 comprises a second screw rod 621 rotatably installed on the inner wall of the sleeve 1, a second motor 622 for driving the second screw rod 621 to rotate, and a guide rod 623 installed on the inner wall of the sleeve 1. The length direction of the second screw rod 621 and the guide rod 623 is consistent with the length direction of the sleeve 1, the second motor 622 is installed on the inner wall of the sleeve 1 by screws, and the output shaft of the second motor 622 is coaxially fixed with one end of the second screw rod 621. Threaded holes are formed through one of the support plates 51, and sliding holes are formed through the other support plate 51. The support plate 51 with the threaded holes is sleeved on the second screw rod 621, and the support plate 51 with the sliding holes is sleeved on the guide rod 623.

[0057] With reference to Figure 5 and Figure 6 The hinged rod 63 is provided with two, two hinged rods 63 are respectively hingedly connected with two connecting rods 7, and two scrapers 4 are respectively installed on the two hinged rods 63. The scraper 4 is installed on the connecting rod 7 through the hinged rod 63, and a torsional spring is arranged at the hinge connection between the hinged rod 63 and the connecting rod 7. The driving plate 11, the lifting assembly 62, the rotating mechanism 5, the connecting rod 7 and the torsional spring are located between the inner sleeve 61 and the sleeve 1.

[0058] When the lifting assembly 62 drives the support plate 51 to slide towards the ground, so that the rotating ring 52 is located at the side of the inner sleeve 61 close to the ground, the connecting rod 7 is coaxially arranged with the hinged rod 63 under the action of the torsional spring. At this time, the distance from the end of the hinged rod 63 away from the connecting rod 7 to the central axis of the inner sleeve 61 is smaller than the radius size of the inner sleeve 61, and the projection of the scraper 4 on the ground is located in the pit. When it is necessary to store the scraper 4, the lifting assembly 62 is started, and the lifting assembly 62 drives the support plate 51 to slide away from the ground. When the support plate 51 drives the connecting rod 7 and the hinged rod 63 to move to the bottom end of the inner sleeve 61, the lifting assembly 62 continues to drive the connecting rod 7 to move away from the ground. At this time, the hinged rod 63 drives the scraper 4 to rotate around one end of the connecting rod 7 under the abutting action of the bottom end of the inner sleeve 61. With the starting of the lifting assembly 62, the support plate 51, the rotating ring 52, the connecting rod 7, the hinged rod 63 and the scraper 4 are all stored in the gap between the inner sleeve 61 and the sleeve 1, so that the scraper 4 does not affect the free falling of the weight 22, and the weight 22 can vertically ram the backfill soil, thereby improving the problem that the compaction effect of the dynamic compactor 2 on the backfill soil is poor.

[0059] In order to prolong the service life of the scraper 4 and improve the scraping effect of the scraper 4 on the backfill soil, referring to Figure 5 and Figure 6 The hinged rod 63 is provided with elastic telescopic rods 8, and a plurality of elastic telescopic rods 8 are arranged along the length direction of the hinged rod 63 and are arranged to be telescopic along the radial direction of the hinged rod 63. One end of the elastic telescopic rod 8 is riveted to the adjacent hinged rod 63, and the other end is riveted to the scraper 4. The scraper 4 is movably connected to the hinged rod 63 through the elastic telescopic rod 8. The elastic telescopic rod 8 elastically connects the scraper 4 to the hinged rod 63, so that when the lifting assembly 62 drives the scraper 4 to move towards the ground, the scraper 4 can elastically abut on the ground, reducing the impact of the scraper 4 on the hinged rod 63. At the same time, when the scraper 4 rotates to scrape the backfill soil, the elastic telescopic rod 8 can be appropriately telescopic according to the height of the backfill soil, thereby improving the scraping effect of the scraper 4 on the backfill soil.

[0060] The implementation principle of the dynamic compactor for reinforcing the shallow silt backfill soil in the embodiment of the application is as follows: when reinforcing the backfill soil, first start the crane 21, the crane 21 hoists the weight 22 to a certain height, and then lets the weight 22 freely fall in the sleeve 1, so that the ground is rammed into a pit by the weight 22. Then the weight 22 is hoisted, the conveying mechanism 3 is started, and the conveying mechanism 3 quantitatively conveys the backfill soil into the pit. After the conveying of the backfill soil is completed, the superposition assembly is started, and the superposition assembly superposes and stores the guide plate 32 in the gap between the sleeve 1 and the inner sleeve 61.

[0061] Then the lifting assembly 62 is started, and the lifting assembly 62 drives the blade 4 to move towards the ground, so that the blade 4 abuts on the backfill. Then the rotating mechanism 5 is started, and the rotating mechanism 5 drives the blade 4 to rotate, so that the blade 4 sweeps the backfill in the pit as flat as possible. After the sweeping of the backfill is completed, the rotating mechanism 5 is paused, and the lifting assembly 62 is started. The lifting assembly 62 drives the support plate 51 to move away from the ground. When the support plate 51 drives the connecting rod 7 and the hinged rod 63 to move to the bottom end of the inner protection cylinder 61, the lifting assembly 62 continues to drive the connecting rod 7 to move away from the ground, and at this time, the hinged rod 63 drives the blade 4 to rotate around one end of the connecting rod 7 under the abutting action of the bottom end of the inner protection cylinder 61. With the starting of the lifting assembly 62, the support plate 51, the rotating ring 52, the connecting rod 7, the hinged rod 63 and the blade 4 are all stored in the gap between the inner protection cylinder 61 and the sleeve 1.

[0062] Finally, the crane 21 is started again, so that the weight 22 freely falls at a certain height. Since the surface layer of the backfill is relatively flat, the weight 22 can vertically ram the backfill, so that the compaction degree of the backfill in each part of the pit is small, and the problem that the compaction effect of the dynamic compactor 2 on the backfill is poor is improved.

[0063] The embodiment of the application further discloses a construction method for reinforcing shallow silt backfill.

[0064] Referring to Figure 7 The construction method for reinforcing shallow silt backfill comprises the following steps:

[0065] S1, construction preparation: removing sundries on the surface layer of the engineering site, and flattening the soil bag and the low-lying pit in the site to the same elevation;

[0066] S2, region division: positioning and laying out in the engineering site, setting coordinate points, and forming grid-shaped compaction regions;

[0067] S3, first-time compaction: using the dynamic compactor 2 to compact the compaction regions according to the order of row by row and grid by grid, and continuously compacting in the same region to form pits;

[0068] S4, second-time compaction: using the dynamic compactor 2 to compact the compaction regions row by row again, and when each row of construction is completed, the next compaction position is staggered by one half from the previous compaction region;

[0069] S5, backfilling: adding backfill to the pit, and flattening the surface of the backfill, and repeating the steps S3 and S4 until the settlement meets the specification requirements.

[0070] The implementation principle of the construction method for reinforcing the shallow silt backfill soil in the embodiment of the present application is as follows: first, the engineering site is cleaned, then the ramming area is determined by laying out a line, the ramming area is treated by using the dynamic compactor 2, after two times of ramming treatment are completed, the backfill soil is added to the pits in a certain amount, and the surface of the backfill soil is leveled, so that the surface of the backfill soil is as much as possible on the same plane. After the addition and leveling of the backfill soil are completed, the dynamic compactor 2 is started again, the weight 22 of the dynamic compactor 2 freely falls vertically, so that the weight 22 can vertically ram the backfill soil, and then the compaction degree of the backfill soil in each part of the pit is small, and the problem of poor ramming effect of the dynamic compactor 2 on the backfill soil is improved.

[0071] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A dynamic compaction device for consolidating shallow muddy backfill, comprising a dynamic compaction machine (2), wherein the dynamic compaction machine (2) comprises a crane (21) and a heavy hammer (22), and is characterized in that: A sleeve (1) is installed on one side of the crane (21), and the weight (22) is slidably arranged in the sleeve (1). The crane (21) is provided with a conveying mechanism (3) for conveying backfill soil into the sleeve (1). A scraper (4) for scraping the backfill soil is movably arranged in the sleeve (1). A rotating mechanism (5) for driving the scraper (4) to rotate and scrape is provided on the sleeve (1). The sleeve (1) is also provided with a storage mechanism (6) for storing the scraper (4). The rotating mechanism (5) comprises a support plate (51) arranged in the sleeve (1), a rotating ring (52) rotatably arranged on the support plate (51), and a driving assembly (53) for driving the rotating ring (52) to rotate, a connecting rod (7) fixedly connected to the rotating ring (52), the connecting rod (7) being arranged along the radial direction of the rotating ring (52), and the scraper (4) being mounted on the connecting rod (7); The storage mechanism (6) comprises an inner casing (61) coaxially fixed in the sleeve (1), a lifting assembly (62) for driving the support plate (51) to slide along the length direction of the sleeve (1), and a hinged rod (63) hingedly connected to the connecting rod (7), the height of the inner casing (61) near the ground is higher than the height of the sleeve (1) near the ground, the weight (22) is located in the inner casing (61), a torsion spring is provided at the hinge of the hinged rod (63) and the connecting rod (7), the lifting assembly (62), the rotating mechanism (5), the connecting rod (7) and the torsion spring are all located between the inner casing (61) and the sleeve (1), and the scraper (4) is mounted on the connecting rod (7) via the hinged rod (63); When the rotating ring (52) is located on the side of the inner casing (61) close to the ground, the connecting rod (7) and the hinge rod (63) are coaxially arranged, and the distance from the end of the hinge rod (63) away from the connecting rod (7) to the central axis of the inner casing (61) is smaller than the radius of the inner casing (61).

2. The dynamic compaction device for reinforcing shallow muddy backfill according to claim 1, characterized in that: An elastic telescopic rod (8) is provided on the hinged rod (63), and the elastic telescopic rod (8) is telescopically arranged along the radial direction of the hinged rod (63). The scraper (4) is movably connected to the hinged rod (63) via the elastic telescopic rod (8).

3. The dynamic compaction device for reinforcing shallow muddy backfill according to claim 1, characterized in that: A soil retaining strip (9) is provided on the scraper (4), and the soil retaining strip (9) is located on a side of the scraper (4) close to the connecting rod (7).

4. The dynamic compaction device for reinforcing shallow muddy backfill according to claim 3, characterized in that: The conveying mechanism (3) includes a belt line (34) rotatably arranged on the crane (21), an inclined guide plate (31) located at the end of the belt line (34), a guide plate (32) connected to the inclined guide plate (31), and a connecting plate (33) for rotatably connecting the inclined guide plate (31) and the guide plate (32). A feeding port (10) is provided on a side of the sleeve (1) close to the belt line (34). The feeding port (10) is located at the inner protective The side of the cylinder (61) close to the ground, the inclined guide plate (31) is tiltedly arranged at one end of the belt line (34) close to the material delivery port (10), the rotation connection between the inclined guide plate (31) and the guide plate (32) is located outside the sleeve (1), the guide plate (32) is located inside the sleeve (1), and a superimposed component for accommodating the guide plate (32) in the gap between the sleeve (1) and the inner casing (61) is provided in the sleeve (1); When the inclined guide plate (31) is parallel to the material guide plate (32), the distance from one end of the material guide plate (32) away from the connecting plate (33) to the central axis of the inner casing (61) is smaller than the radius of the inner casing (61).

5. The dynamic compaction device for reinforcing shallow muddy backfill according to claim 4, characterized in that: The stacking assembly comprises a driving plate (11) movably arranged between the sleeve (1) and the inner casing (61) and a power assembly (12) for driving the driving plate (11) to slide along the length direction of the sleeve (1). The driving plate (11) is provided with a long through hole (13), the length direction of the through hole (13) is consistent with the sliding direction of the driving plate (11), and the guide plate (32) is provided through the through hole (13).

6. A construction method for reinforcing shallow muddy backfill, based on the dynamic compaction device for reinforcing shallow muddy backfill according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, Construction Preparation: Clear the surface debris of the construction site and level the earth mounds and low-lying pits in the site to the same elevation; S2, area division: positioning and laying out the lines in the project site, setting up coordinate points, and forming a grid-like compaction area; S3, first compaction: using a dynamic compactor (2) to compact the compacted area in a row-by-row and grid-by-grid order, and compacting the same area multiple times to form pits; S4, second compaction: using a dynamic compaction machine (2) to compact the compacted area again row by row, after compacting one grid of the compacted area during each row, the next compaction position is staggered with the previous compaction area by half; S5, backfilling: add backfill soil into the pit and level the surface of the backfill soil, repeating the above steps S3 and S4 until the tamping amount meets the specification requirements.

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