Equipment and method for backfilling soft soil foundation

Abstract

This invention provides a soft soil foundation backfilling device and method, comprising: a load-bearing truss, the load-bearing truss having a fixed frame, and a backfilling frame for foundation backfilling at the bottom of the fixed frame; a discharge port, the discharge port being slidably disposed on the fixed frame, with its bottom extending into the backfilling frame, the fixed frame having a transmission unit connected to the discharge port for driving it to move within the backfilling frame; a feed inlet, the feed inlet being disposed on the top of the load-bearing truss, with a flexible conveying pipe at one end of the feed inlet connected to the top of the discharge port; and a moving unit, disposed on the side of the load-bearing truss, with a feeding unit at the other end of the feed inlet, the feeding unit being disposed within the moving unit. This solution integrates the feeding unit, feed inlet, flexible conveying pipe, discharge port, transmission unit, and moving unit into a single unit, providing better flatness and compaction compared to traditional extensive paving, thus providing an optimal working surface for subsequent compaction processes.

Description

Technical Field

[0001] This invention relates to the field of soft soil foundation backfilling construction technology, specifically to a soft soil foundation backfilling equipment and method. Background Technology

[0002] In the construction of roads, dams, airports, and building foundations, the treatment of soft soil foundations is a crucial and challenging process. Due to its high water content, high compressibility, and low bearing capacity, soft soil foundations usually cannot be used directly as bearing layers and must be reinforced or replaced. Among these methods, "excavation and replacement" is a commonly used and effective approach. This involves partially or completely excavating the soft soil layer below the foundation and backfilling it with high-strength, stable materials such as sand, gravel, or slag, compacting it in layers to form a solid new foundation.

[0003] The conventional method for backfilling soft soil foundations is the "grid method." Backfill materials are transported to the work site by dump trucks and unloaded, forming a concentrated pile. Excavators or loaders are then used to roughly break up and level the pile. However, the conventional grid method has significant drawbacks:

[0004] Firstly, the entire process is fragmented, requiring various large equipment such as dump trucks, excavators, and road rollers to take turns entering the site and working alternately. The equipment scheduling is complex, and the waiting time between them is long, resulting in a long construction cycle.

[0005] Secondly, relying on excavator buckets or loader teeth for paving is a rough process that can easily cause aggregate segregation and makes it difficult to ensure the uniformity of the paving thickness. The uneven density and load-bearing capacity of the backfill layer after compaction will create hidden quality problems for the project. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a soft soil foundation backfilling device and method, which solves the problems of difficulty in accurately controlling backfilling quality and low construction efficiency in soft soil foundation backfilling.

[0007] On one hand, according to an embodiment of the present invention, a soft soil foundation backfilling device includes:

[0008] The load-bearing truss is equipped with a fixed frame, and the bottom of the fixed frame is equipped with a backfill frame for foundation backfilling.

[0009] The discharge port is slidably mounted on the fixed frame, and the bottom of the discharge port extends into the backfill frame. The fixed frame is equipped with a transmission unit, which is connected to the discharge port to drive it to move within the backfill frame.

[0010] The feed inlet is located at the top of the supporting truss, and one end of the feed inlet is equipped with a flexible conveying pipe, which is connected to the top of the discharge port.

[0011] The moving unit is located on the side of the supporting truss, and the other end of the feed inlet is equipped with a feeding unit, which is located on the moving unit.

[0012] Preferably, the transmission unit includes:

[0013] Two sliders are provided, and grooves are provided on both sides of the fixed frame. The two sliders are slidably disposed in the two grooves and are respectively connected to the two sides of the feed port.

[0014] The first chain has two fixed seats on both sides of the fixed frame, and the first sprocket is rotatably mounted on each of the two fixed seats. The first chain is located between the two first sprockets.

[0015] A drive block is provided on the slider. A drive pin is fixed on the first chain. The drive block has a drive groove, and the drive pin passes through the drive groove.

[0016] The transmission component is located in the fixed frame and is connected to one of the first sprockets.

[0017] Preferably, the transmission component includes:

[0018] The second chain has a second sprocket on both the shaft of the first sprocket and the supporting truss, and the second chain is connected between the two second sprockets;

[0019] A dual-axis motor, with its two output shafts connected to corresponding second sprockets.

[0020] Preferably, pulley sets are provided on both the upper and lower sides of the slider, and the pulley sets are in rolling connection with the inner side of the slide groove.

[0021] Preferably, the movable unit includes a counterweight truss, which is located on the side of the load-bearing truss, and movable frames are provided on both sides of the counterweight truss.

[0022] Preferably, the feeding unit is a hopper, which is located on the counterweight truss and connected to the feeding port;

[0023] Alternatively, the feeding unit may be a belt conveyor, which is located on a counterweight truss and extends into the flexible conveying pipe.

[0024] Preferably, the discharge port includes a connecting frame connected to the slider and a discharge frame sleeved on the connecting frame. The connecting frame is fixedly provided with a connecting plate, and the discharge frame is provided with an adjusting screw corresponding to the connecting plate. The adjusting screw passes through the connecting plate and is threadedly connected to a limit nut. The limit nut abuts against the upper end face of the connecting plate.

[0025] Preferably, the backfill frame includes multiple backfill plates disposed at the bottom of the fixed frame. The multiple backfill plates are detachably connected to each side of the fixed frame by screws, and the multiple backfill plates are connected end to end.

[0026] Preferably, the fixed frame is provided with a mounting plate, the mounting plate is sleeved on the load-bearing truss, the load-bearing truss is provided with a mounting seat, the mounting seat is provided with a telescopic member, and the telescopic end of the telescopic member passes through the mounting seat and is connected to the fixed frame.

[0027] On the other hand, according to an embodiment of the present invention, a soft soil foundation backfilling method includes a soft soil foundation backfilling device and further includes the following steps:

[0028] S1: On-site preparation, excavate the roadbed in layers to ensure that the topsoil stripping thickness is not less than 30cm;

[0029] S2: Equipment positioning, using the moving unit to move the entire equipment above the backfill area of ​​the soft soil foundation, and aligning the bottom of the backfill frame with the first grid.

[0030] S3: Backfilling and feeding. Backfill material is fed into the feeding unit through external equipment, so that the backfill material falls into the center of the area enclosed by the backfill frame through the inlet, flexible conveying pipe and discharge outlet.

[0031] S4: Dynamic uniform spreading. The transmission unit is activated to drive the discharge port to move back and forth in a straight line inside the backfill frame. The backfill material continuously flows out from the moving discharge port and is evenly spread in the area enclosed by the entire backfill frame to form a backfill layer of uniform thickness.

[0032] S5: Cyclic operation. After the backfill in the current area reaches the predetermined elevation, the equipment is moved to the adjacent grid by the moving unit. S3-S4 are repeated until the backfilling construction of all areas is completed.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] This solution integrates the feeding unit, inlet, flexible conveying pipeline, discharge port, transmission unit, and moving unit into a single unit. Backfill material can be continuously fed from the feeding unit through the inlet and flexible conveying pipeline, and finally discharged from the discharge port. Moreover, the discharge port can reciprocate along a specific trajectory within the backfill frame, allowing the backfill material to be evenly spread during its descent. This ensures that the backfill material forms a uniform and loosely laid layer before compaction. Compared to traditional extensive paving, it has better flatness and density, providing the best working surface for subsequent compaction processes and ensuring that the compacted foundation has a uniform bearing capacity. Attached Figure Description

[0035] Figure 1This is a three-dimensional structural diagram of the backfilling device in an embodiment of the present invention.

[0036] Figure 2 This is a bottom view of the backfilling device in an embodiment of the present invention.

[0037] Figure 3 This is a side view of the backfilling device in an embodiment of the present invention.

[0038] Figure 4 This is a diagram showing the working trajectory of the backfilling device in an embodiment of the present invention.

[0039] Figure 5 This is a schematic diagram of the assembly structure of the load-bearing truss and the fixed frame in an embodiment of the present invention.

[0040] Figure 6 This is a schematic diagram of the assembly structure of the transmission unit and the fixed frame in an embodiment of the present invention.

[0041] Figure 7 This is an exploded structural diagram of the drive block and drive pin in an embodiment of the present invention.

[0042] Figure 8 This is a three-dimensional structural diagram of the transmission unit in an embodiment of the present invention.

[0043] Figure 9 This is a three-dimensional structural diagram of the feed port and a partially enlarged structural diagram of it in an embodiment of the present invention.

[0044] Figure 10 This is a schematic diagram of the assembly structure of the backfill plate and the fixing frame in an embodiment of the present invention.

[0045] Figure 11 This is a schematic diagram illustrating one of the horizontal backfilling methods in an embodiment of the present invention.

[0046] Figure 12 This is a schematic diagram illustrating another horizontal backfilling method in an embodiment of the present invention.

[0047] Figure 13 This is a schematic diagram of the structure of the feed port during the initial feeding in an embodiment of the present invention.

[0048] Figure 14 This is a schematic diagram of the structure when the feeding port completes feeding in an embodiment of the present invention.

[0049] In the above attached figures:

[0050] 1. Load-bearing truss; 101. Feed inlet; 102. Mounting base;

[0051] 2. Counterweight truss; 201. Movable frame;

[0052] 3. Fixed frame; 301. Fixed base; 302. Slide groove; 303. Mounting plate;

[0053] 4. Feeding port; 401. Flexible conveying pipe; 402. Slider; 403. Feeding frame; 404. Connecting frame; 405. Connecting plate; 406. Adjusting screw; 407. Limit nut; 408. Pulley block;

[0054] 5. Backfill box; 501. Backfill plate;

[0055] 6. First sprocket; 601. First chain; 602. Second sprocket; 603. Second chain; 604. Dual-shaft motor; 605. Drive block; 606. Drive groove; 607. Drive pin;

[0056] 7. Hopper;

[0057] 8. Telescopic components. Detailed Implementation

[0058] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0059] This invention provides a soft soil foundation backfilling device, comprising:

[0060] The load-bearing truss 1 is provided with a fixed frame 3, and the bottom of the fixed frame 3 is provided with a backfill frame 5 for foundation backfilling.

[0061] The discharge port 4 is slidably disposed on the fixed frame 3, and the bottom of the discharge port 4 extends into the backfill frame 5. The fixed frame 3 is provided with a transmission unit, which is connected to the discharge port 4 and is used to drive it to move within the backfill frame 5.

[0062] The feed inlet 101 is located at the top of the supporting truss 1, and one end of the feed inlet 101 is provided with a flexible conveying pipe 401, which is connected to the top of the discharge port 4.

[0063] The moving unit is located on the side of the supporting truss 1, and the other end of the feed inlet 101 is provided with a feeding unit, which is located on the moving unit.

[0064] In this embodiment, as Figure 1 , Figure 2 and Figure 3As shown, the feeding unit, inlet 101, flexible conveying pipe 401, discharge port 4, transmission unit, and moving unit are integrated into a single unit. Backfill material can continuously flow from the feeding unit through the inlet 101 and flexible conveying pipe 401, ultimately being discharged from the discharge port 4. The discharge port 4 can reciprocate along a specific trajectory within the backfill frame 5, ensuring the backfill material is evenly spread during its descent. This allows the backfill material to form a uniform, loosely laid layer before compaction, resulting in better flatness and density compared to traditional extensive paving. This provides an optimal working surface for subsequent compaction processes, ensuring the compacted foundation has uniform bearing capacity. The flexible conveying pipe 401 has contraction and expansion functions, and its structure can be made of soft rubber pipe material, preferably a corrugated pipe structure.

[0065] Specifically, when this equipment is working, it also uses the "grid method" to backfill soft soil foundations, but it does not require the use of lime to mark the grid lines on the soft soil site. If necessary, a baseline can be drawn. In this equipment, the area corresponding to the backfill frame 5 is a grid. Before construction, the load-bearing truss 1 is moved to the designated position, i.e. the starting position of the baseline, by the moving unit. The backfill frame 5 is a conventional rectangular structure. When filling the backfill, the backfill frame 5 can abut against the excavated foundation. To adapt to uneven ground, small gaps are allowed. While ensuring that the backfill frame 5 can move normally with the moving unit, the backfill material is not easy to leak out from the gaps during the continuous backfilling of the backfill material.

[0066] The feeding unit serves as the feeding process for the backfill material. It can load all the backfill material and move it to a designated location, or allow a loader to enter the designated location and invert the backfill material into the feeding unit. Figure 13 and Figure 14 As shown, in the initial state, the discharge port 4 is located close to the side of the backfill frame 5. When the backfill material enters the discharge port 4 through the feeding unit, the feeding port 101, and the flexible conveying pipe 401, the backfill material will gradually accumulate in the backfill frame 5 at the position corresponding to the discharge port 4, and gradually fill the side of the backfill frame 5 until it is flush with the port of the discharge port 4. After it is flush, the port of the discharge port 4 is blocked by the backfill material and the discharge stops. This moment indicates that the backfilling of the soft soil foundation at the position corresponding to the discharge port 4 is basically completed.

[0067] At this time, with the cooperation of the transmission unit, the discharge port 4 is driven to move along its width direction. The length of the discharge port 4 is basically the same as the inner dimension of the backfill frame 5. Until the discharge port 4 moves to the adjacent discharge area, when the discharge port 4 is not blocked by the backfill material in the backfill frame 5, it resumes automatic discharge. This operation is repeated until the discharge port 4 is close to the other side of the backfill frame 5, completing the backfilling of the last hole in the backfill frame 5. During the backfilling, the backfill material in the backfill frame 5 will basically not exceed the position of the discharge port 4. When the discharge port 4 is moved, it can also play a role in spreading and leveling. At the same time, after all the holes are backfilled, the position of the discharge port 4 can be moved multiple times to replenish the material in the unevenly filled areas in the backfill frame 5.

[0068] During material feeding, the transmission unit can drive the feeding port 4 in a reciprocating motion, rather than an intermittent movement. By activating the transmission unit, the feeding port 4 reciprocates within the backfill frame 5, allowing the backfill material discharged from the feeding port 4 to overlap layer by layer within the backfill frame 5 until the feeding port 4 can no longer discharge backfill material during its reciprocating motion. This completes the backfilling of one "square" of soft soil foundation. After completion, as follows... Figure 4 As shown, the position of the backfill box 5 is moved by the moving unit to change the backfill position, i.e., the next "square".

[0069] In the reciprocating transmission of the feed port 4, a screw drive structure or a telescopic rod structure such as a cylinder can be used. Due to limitations in the construction site and environment, the structure of the transmission unit needs to be optimized, such as... Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the transmission unit includes:

[0070] Two sliders 402, and grooves 302 are provided on both sides of the fixed frame 3. The two sliders 402 are slidably disposed in the two grooves 302 and are respectively connected to both sides of the feed port 4.

[0071] The first chain 601 has two fixing seats 301 on both sides of the fixing frame 3. The two fixing seats 301 are rotatably equipped with the first sprocket 6. The first chain 601 is located between the two first sprockets 6.

[0072] A drive block 605 is provided on the slider 402. A drive pin 607 is fixedly provided on the first chain 601. A drive groove 606 is provided in the drive block 605. The drive pin 607 passes through the drive groove 606.

[0073] The transmission component is located in the fixed frame 3 and is connected to one of the first sprockets 6.

[0074] Two sliders 402 are located on both sides of the discharge port 4, mainly serving to support the discharge port 4. Simultaneously, pulley groups 408 are provided on both the upper and lower sides of the sliders 402. The pulley groups 408 are rolledly connected to the inner side of the slide groove 302. When the slider 402 is inserted into the slide groove 302, the pulley groups 408 on both sides make close contact with the upper and lower inner walls of the slide groove 302, respectively, transforming the original sliding friction into rolling friction. This significantly reduces the force required to push the slider 402 and its load, indirectly making the operation of the discharge port 4 very easy and smooth. Two first sprockets 6 and a first chain 601 connecting the two first sprockets 6 form a transmission chain. These two transmission chains are installed on both sides of the fixed frame 3, providing synchronous drive for both sides of the discharge port 4 and ensuring stability.

[0075] The transmission component can be a motor, and two motors are used. Each motor is connected to one of the first sprockets 6 of two transmission chains. When the motor drives the transmission, it causes the first sprocket 6 connected to it to rotate. Under the action of the first chain 601, the first sprocket 6 is driven to rotate. During the continuous movement of the first chain 601, the drive pin 607, which is fixedly installed on a certain segment of the first chain 601, follows the first chain 601 and makes a cyclical movement between the two first sprockets 6. The movement of the drive pin 607 can be understood as linear motion and circular motion. Linear motion originates between the two first sprockets 6, while circular motion originates at the point where the first sprocket 6 matches the first chain 601. The drive groove 606 has a strip-shaped structure, and the drive pin 607 passes through it. When the drive pin 607 moves linearly, it remains stationary within the drive groove 606 and continuously pushes the drive block 605 in linear motion. When the drive pin 607 moves in a circular motion, it gradually rises or falls within the drive groove 606, thus reversing the linear motion. Compared to screw drive structures, chain drives are enclosed or semi-enclosed transmissions, with a much higher tolerance to harsh working conditions (such as dust and humidity) than screws and cylinders. Even if a small amount of dust enters, it is not easy to cause transmission failure, resulting in high reliability and making it very suitable for construction site environments. However, to ensure stability, it is necessary to shield the transmission parts, such as the motor, sprockets, and chain, in actual use. This is achieved through conventional technical means, such as protective housings.

[0076] like Figure 8 As shown, the transmission component includes:

[0077] The second chain 603 is provided with a second sprocket 602 on both the shaft of the first sprocket 6 and the supporting truss 1, and the second chain 603 is connected between the two second sprockets 602.

[0078] A dual-axis motor 604, the two output shafts of which are respectively connected to the corresponding second sprockets 602.

[0079] During transmission, a dual-axis motor 604 is used to synchronously drive the sliders 402 on both sides. When the dual-axis motor 604 is driven, its two output shafts simultaneously drive the corresponding two second sprockets 602. Under the action of the second chain 603, the other second sprocket 602 is driven to rotate, and finally the synchronous transmission of the first sprockets 6 on both sides is achieved, ensuring that the driving force acting on both sides of the feed port 4 is completely symmetrical and synchronous, and the transmission is more stable.

[0080] Specifically, such as Figure 1 and Figure 2 As shown, the mobile unit includes a counterweight truss 2, which is located on the side of the load-bearing truss 1. Both sides of the counterweight truss 2 are equipped with mobile frames 201. The counterweight truss 2 can generate a stabilizing moment opposite to the overturning moment, which greatly improves the anti-overturning stability of the equipment. At the same time, the mobile frames 201 on both sides provide stable walking capability. When moving, the mobile frames 201 can be driven, or a traction frame can be installed and mounted on a traction vehicle to realize the movement of the entire equipment.

[0081] Specifically, such as Figure 3 As shown, the feeding unit is a hopper 7, which is located on the counterweight truss 2 and connected to the feeding port 101.

[0082] Alternatively, the feeding unit may be a belt conveyor, which is located on the counterweight truss 2 and extends into the flexible conveying pipe 401.

[0083] There are various applicable scenarios when loading backfill. For example, when the feeding unit is hopper 7, hopper 7 is a commonly used loading structure in conventional technology. It has an open inclined guide structure and a discharge valve plate structure. If hopper 7 is a load-bearing structure, it can directly load a specified cubic meter of backfill to the construction site, and open and close the valve plate to realize material discharge and material stop. If hopper 7 is a conveying structure, hopper 7 can collect the backfill unloaded by the loading vehicle and discharge it uniformly.

[0084] To accommodate loading vehicles of different cubic sizes, i.e., to reduce the material receiving height, the feeding unit can use a belt conveyor. The opening and closing of the belt conveyor completes the material conveying and stopping.

[0085] Specifically, such as Figure 9 As shown, the discharge port 4 includes a connecting frame 404 connected to the slider 402 and a discharge frame 403 sleeved on the connecting frame 404. The connecting frame 404 is fixedly provided with a connecting plate 405. The discharge frame 403 is provided with an adjusting screw 406 corresponding to the connecting plate 405. The adjusting screw 406 passes through the connecting plate 405. The adjusting screw 406 is threadedly connected to a limit nut 407. The limit nut 407 abuts against the upper end face of the connecting plate 405.

[0086] With the cooperation of the connecting frame 404 and the feeding frame 403, the bottom opening of the feeding port 4 has a certain shrinkage function, which can be applied to different soft soil foundation treatment scenarios. The expandable feeding port 4 can also be used for construction tests. During engineering construction, it is often necessary to select a section of filling in the test section to determine the loose paving coefficient. For example, when testing and determining the loose paving thickness and loose paving coefficient, the first loose paving thickness is controlled at 35cm, 30cm and 25cm, and the test data is as follows:

[0087]

[0088] It can be concluded that the mechanical utilization rate is highest when the loose paving thickness is controlled at 30cm. Therefore, the maximum loose paving thickness in this area is determined to be 30cm. The above test can be carried out in the backfilling of different soft soil foundations. When controlling the loose paving thickness of the test section, the position of the material feeding frame 403 can be adjusted up and down, and the distance between the material feeding frame 403 and the foundation can be measured. When the distance is 35cm, 30cm and 25cm, the limit nut 407 connected by its thread can be rotated so that it abuts against the upper end face of the connecting plate 405 to complete the limit of the material feeding frame 403.

[0089] Specifically, such as Figure 10 As shown, the backfill frame 5 includes multiple backfill plates 501 located at the bottom of the fixed frame 3. The multiple backfill plates 501 are detachably connected to each side of the fixed frame 3 by screws, and the multiple backfill plates 501 are connected end-to-end. The backfill frame 5 has a conventional rectangular structure, and preferably uses four backfill plates 501. All four backfill plates 501 are fixed with screws and are respectively installed on the four sides of the backfill frame 5. The backfill plates 501 have the same height, and the screw fixing method facilitates the installation and removal of one, two, three, or all of the backfill plates 501.

[0090] For example, such as Figure 11 As shown, during the initial horizontal backfilling process in soft soil foundation backfilling, the right side is the already backfilled grid. When moving to the left, the right backfill plate 501 can be disassembled (as shown in the figure). The side of the backfilled grid is used as the closing edge to complete the second grid backfilling. There may be collapses or slopes between the first and second backfill grids. The collapsed or sloped backfill material is located in the second backfill grid. Therefore, during the repeated backfilling of the second backfill grid, the collapsed or sloped areas can be backfilled again. The dimensions of the second, third, and subsequent movements can be the width of the first backfill or smaller than the width of the first backfill.

[0091] For example, such as Figure 12As shown, after the first row of horizontal backfilling is completed, the top and sides of the grid to be backfilled have been completed. At this time, the backfilling plate 501 on the right and top can be removed, and the grid to be backfilled can be backfilled with the side of the backfilled grid as the closed edge. After the backfilling is completed, the subsequent compaction process is carried out.

[0092] Specifically, such as Figure 2 , Figure 3 and Figure 5 As shown, the fixed frame 3 is provided with a mounting plate 303, which is sleeved on the load-bearing truss 1. The load-bearing truss 1 is provided with a mounting seat 102, and the mounting seat 102 is provided with a telescopic member 8. The telescopic end of the telescopic member 8 passes through the mounting seat 102 and is connected to the fixed frame 3.

[0093] The telescopic component 8 is preferably an electric telescopic rod. By controlling the lifting and lowering of the telescopic end of the telescopic component 8, the fixed frame 3 can be lifted up and down. When the equipment is not in use, the fixed frame 3 can be lifted up so that each backfill plate 501 is away from the ground for easy transportation.

[0094] This invention also proposes a method for backfilling soft soil foundations, including the aforementioned soft soil foundation backfilling equipment, and further comprising the following steps:

[0095] S1: On-site preparation, excavate the roadbed in layers to ensure that the topsoil stripping thickness is not less than 30cm;

[0096] S2: Equipment positioning, the entire equipment is moved to the area to be backfilled in the soft soil foundation by the moving unit, and the bottom of the backfill box 5 is aligned with the first square;

[0097] S3: Backfilling and feeding: Backfill material is fed into the feeding unit through external equipment, so that the backfill material falls into the center of the area enclosed by the backfill frame 5 through the inlet 101, the flexible conveying pipe 401 and the outlet 4.

[0098] S4: Dynamic uniform spreading. The transmission unit is started to drive the discharge port 4 to move linearly back and forth inside the backfill frame 5. The backfill material continuously flows out from the moving discharge port 4 and is evenly spread in the area enclosed by the entire backfill frame 5 to form a backfill layer of uniform thickness.

[0099] S5: Cyclic operation. After the backfill in the current area reaches the predetermined elevation, the equipment is moved to the adjacent grid by the moving unit. S3-S4 are repeated until the backfilling construction of all areas is completed.

[0100] In the backfilling method, dynamic uniform spreading ensures the uniformity and flatness of the backfill layer, providing an ideal working surface for subsequent compaction, fundamentally improving the overall quality of the foundation, while reducing equipment configuration and labor input, and lowering the overall construction cost.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A soft ground foundation backfilling apparatus characterized by, The utility model provides a kind of material feeding device, including: A bearing truss (1) is provided with fixed frame (3), the bottom of fixed frame (3) is provided with backfill frame (5) for foundation backfilling; The lower outlet (4) is slidably arranged in the fixed frame (3), and the bottom of the lower outlet (4) extends into the backfill frame (5), and the fixed frame (3) is provided with a transmission unit connected to the lower outlet (4) for driving it to move in the backfill frame (5); The feeding port (101) is arranged at the top of the bearing truss (1), and one end of the feeding port (101) is provided with a flexible conveying pipe (401) connected to the top of the lower outlet (4); A moving unit is arranged on the side of the bearing truss (1), and the other end of the feeding port (101) is provided with a feeding unit arranged in the moving unit; The transmission unit comprises: Two sliding blocks (402) are slidably arranged in the two sliding grooves (302) respectively and connected to the two sides of the lower outlet (4); A first chain (601) is arranged between the two first sprockets (6); A driving block (605) is arranged in the sliding block (402), and a driving pin (607) is fixedly arranged on the first chain (601), and the driving block (605) is provided with a driving groove (606), and the driving pin (607) is arranged in the driving groove (606); A transmission member is arranged in the fixed frame (3) and connected to one of the first sprockets (6); The upper and lower sides of the sliding block (402) are provided with a pulley block (408) rolling connected to the inner side of the sliding groove (302).

2. The soft ground backfilling apparatus of claim 1, wherein The transmission member comprises: A second chain (603) is connected between the two second sprockets (602); A double-shaft motor (604) is connected to the corresponding second sprocket (602) through its two output shafts.

3. The soft ground backfilling apparatus of claim 1, wherein The moving unit comprises a counterweight truss (2) arranged on the side of the bearing truss (1), and the two sides of the counterweight truss (2) are provided with a moving frame (201).

4. The soft ground backfilling apparatus of claim 3, wherein The feeding unit is a hopper (7) arranged in the counterweight truss (2) and connected to the feeding port (101); Or the feeding unit is a belt conveyor arranged in the counterweight truss (2) and extending into the flexible conveying pipe (401).

5. The soft ground backfilling apparatus of claim 1, wherein The blanking port (4) comprises a connecting frame (404) connected with the sliding block (402) and a blanking frame (403) sleeved on the connecting frame (404), the connecting frame (404) is fixedly provided with a connecting plate (405), the blanking frame (403) is provided with an adjusting screw rod (406) corresponding to the connecting plate (405), the adjusting screw rod (406) is arranged through the connecting plate (405), the adjusting screw rod (406) is threadedly connected with a limiting nut (407), and the limiting nut (407) abuts against the upper end surface of the connecting plate (405).

6. The soft ground backfilling apparatus of claim 1, wherein The backfill frame (5) comprises a plurality of backfill plates (501) arranged at the bottom of the fixed frame (3), the plurality of backfill plates (501) are respectively detachably connected to each side of the fixed frame (3) through screws, and the plurality of backfill plates (501) are connected end to end.

7. The soft ground backfilling apparatus of claim 1, wherein The fixed frame (3) is provided with a mounting plate (303) sleeved on the bearing truss (1), the bearing truss (1) is provided with a mounting seat (102), the mounting seat (102) is provided with an expansion joint (8), and the expansion end of the expansion joint (8) is connected to the fixed frame (3) through the mounting seat (102).

8. A method of backfilling a soft ground foundation, characterized by, The soft soil backfilling equipment comprises a soft soil backfilling device according to any one of claims 1-7, and further comprises the following steps: S1: on-site preparation, the roadbed is excavated in layers, and the thickness of the stripped topsoil is ensured to be not less than 30 cm; S2: equipment positioning, the entire equipment is moved to above the to-be-backfilled area of the soft soil foundation through the moving unit, and the bottom of the backfill frame (5) corresponds to the first square; S3: backfilling and feeding, the backfilling material is filled into the feeding unit through an external device, and the backfilling material falls into the center of the area enclosed by the backfill frame (5) through the feeding port (101), the flexible conveying pipeline (401) and the blanking port (4); S4: dynamic uniform paving, the transmission unit is started to drive the blanking port (4) to move linearly and reciprocally in the backfill frame (5), and the backfilling material continuously flows out of the moving blanking port (4), so that the backfilling material is uniformly paved in the area enclosed by the backfill frame (5), and a backfilling layer with uniform thickness is formed; S5: cyclic operation, after the backfilling of the current area reaches the predetermined elevation, the equipment is moved to an adjacent square through the moving unit, and S3-S4 are repeated until the backfilling construction of all areas is completed.

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