High fill roadbed construction process and construction device thereof

Abstract

The application belongs to the technical field of roadbed filling, in particular to a high fill roadbed construction process and a construction device thereof, which comprises an excavator main body; a large arm end of the excavator main body is hinged with a trimming unit; the trimming unit comprises a cross beam; a trimming pressing plate is arranged at one end of the bottom surface of the cross beam; the bottom of the trimming pressing plate is arc-shaped and triangular; the excavator main body moves to the side slope of the embankment; the large arm of the excavator main body drives the trimming unit to move to the trimming position; the large arm of the excavator main body presses and cuts the arc-shaped triangular cutter into the side slope of the embankment; the excavator main body moves horizontally along the embankment, drives the arc-shaped triangular cutter to move horizontally, and cuts off the overfill width on both sides of the roadbed, which not only improves the construction efficiency of the high fill roadbed, but also reduces the overfill width of the roadbed on both sides.

Description

Technical Field

[0001] This invention belongs to the field of roadbed filling technology, specifically a high-fill roadbed construction process and its construction device. Background Technology

[0002] The roadbed is the foundation of the track or pavement. Its main function is to provide the necessary conditions for the laying of the track or pavement, and to bear static and dynamic loads, while transferring and dispersing the loads deep into the foundation. The roadbed must ensure the required elevation of the line. At the same time, the roadbed connects with bridges and tunnels to form a complete and continuous line.

[0003] The foundation soil of a high embankment will undergo compression deformation due to the significant pressure exerted on it by the fill material, and the fill material will also undergo compaction deformation under its own weight. Both of these deformations require a considerable amount of time to complete and gradually reach stability. To ensure the engineering quality of the high embankment, construction must be prioritized. The road construction materials for high embankments are soil and ballast from the excavated sections. The construction of the high embankment roadbed mainly consists of excavation, filling, compaction, and finishing processes, requiring the use of excavators, bulldozers, road rollers, and graders.

[0004] During construction, the embankment slope is mainly trimmed by excavators to cut off the overfill width on both sides of the roadbed. However, using the excavator bucket requires multiple trimmings, which can easily lead to over-excavation or under-excavation, resulting in uneven edges of the roadbed.

[0005] Therefore, the present invention provides a construction process and construction device for high embankment roadbed. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is: a high embankment roadbed construction process described in this invention, the construction process including the following steps:

[0008] S1: Subgrade foundation treatment, the ground is excavated into steps, each step is not less than 2m wide, and a cross slope of 2% to 4% is provided; the foundation treatment method is to remove soft plastic silty clay, impact and compact hard silty clay foundation, backfill with crushed stone and compact it evenly with a compaction degree of not less than 90%, and the bearing capacity of the foundation after compaction is not less than 240kPa.

[0009] S2: Roadbed filling is carried out by a method of full-width cross-section and longitudinal layer filling; the fill material is transported by excavators and dump trucks, spread by bulldozers and graders, filled in layers, and compacted by vibratory rollers.

[0010] S3: Embankment slope trimming. Using construction equipment, the embankment slope is trimmed. The excavator body is moved to the embankment slope, and the excavator boom drives the trimming unit to the trimming location. The motor drives the first gear on both sides to rotate synchronously through the transmission of the second gear and the synchronous belt. This drives the sliding columns on both sides to slide up and down in sequence, driving the arc-shaped triangular cutter to make up-and-down inclined cuts. At the same time, the excavator body moves along the embankment slope to perform continuous cutting and trimming.

[0011] S4: Waste soil cleanup. The soil cut off during trimming and cutting is collected by a scraper. At the same time, a screw conveyor transports the collected soil upwards, where it is then loaded and transported away by a truck.

[0012] Preferably, a high embankment roadbed construction device is provided, which is applicable to the above-mentioned high embankment roadbed construction process. The construction device includes an excavator body; a trimming unit is hinged to the end of the boom of the excavator body; the trimming unit includes a crossbeam; a trimming pressure plate is provided at one end of the bottom surface of the crossbeam, and the bottom of the trimming pressure plate near the excavator body is an arc-shaped triangular cutter; the excavator body moves to the slope of the embankment, the boom of the excavator body drives the trimming unit to the trimming location, the boom of the excavator body presses down the arc-shaped triangular cutter to cut into the slope of the embankment, the excavator body moves horizontally along the embankment, driving the arc-shaped triangular cutter to move horizontally, cutting off the overfill width on both sides of the roadbed, which not only improves the construction efficiency of high embankment roadbeds, but also reduces the probability of over-excavation or under-excavation of the overfill width on both sides of the roadbed.

[0013] Preferably, the top surface of the trimming plate is hinged with sliding columns on both sides. The sliding columns slide through the side protrusions of the crossbeam. A cross plate is fixedly connected to the middle of the sliding column. A groove is formed in the middle of the cross plate. A pair of inserts are fixedly connected to the top surface of the crossbeam near the trimming plate. The top of the sliding column slides through the top of the insert. A first gear is rotatably installed in the middle of the side of the insert near the cross plate. Rotating rods are rotatably installed on the side of the first gear near the cross plate on both sides. The rotating rods on both sides are arranged opposite each other. The outer ring of the rotating rod is connected to the groove. The inner wall slides together. A motor is fixedly connected to the top surface of the crossbeam near the trimming plate. The motor is located between two plates. A second gear is fixedly connected to the outer ring of the motor shaft. A synchronous belt is fitted around the outer ring of the second gear and the first gear. The motor drives the second gear to rotate, which in turn drives the synchronous belt to rotate, which in turn drives the first gears on both sides to rotate synchronously. This causes the rotating rods on both sides to make circular motions, which in turn drives the two ends of the arc-shaped triangular cutter to make up-and-down undulating motions, thereby improving the cutting efficiency and trimming effect of the arc-shaped triangular cutter on the embankment slope.

[0014] Preferably, an annular bar is fixedly connected to the outer ring of the middle part of the slide groove, and a pair of bearings are rotatably installed on the outer ring of the rotating rod. The outer ring of the bearings slides in cooperation with the inner wall of the slide groove, and the pair of bearings are located on both sides of the annular bar. By setting the bearings, the friction between the rotating rod and the slide groove is reduced, the efficiency of the rotating rod sliding inside the slide groove is improved, thereby improving the accuracy of the sliding of the two sliding columns. By setting the two bearings and cooperating with the annular bar, the probability of the rotating rod disengaging from the inside of the slide groove is reduced.

[0015] Preferably, the arc-shaped triangular cutter has multiple teeth evenly fixed to its arc-shaped side, and the outer side of the teeth has an inclined cutting edge; the teeth improve the sharpness of the arc-shaped side of the arc-shaped triangular cutter and enhance the cutting effect of the arc-shaped triangular cutter on the embankment slope.

[0016] Preferably, a scraper is fixed to the other end of the bottom surface of the crossbeam, and the bottom horizontal height of the scraper is at the same level as the bottom horizontal height of the arc-shaped triangular cutter; the waste soil is scooped up by the horizontal movement of the scraper, so that the waste soil is collected inside the scraper, which makes it easier for the user to clean up the waste soil and improves the construction efficiency of the construction personnel.

[0017] Preferably, a screw conveyor is vertically fixed to the side of the scraper away from the arc-shaped triangular cutter. The bottom of the screw conveyor is provided with a soil inlet on the side near the arc-shaped triangular cutter. An inclined baffle is fixed between the outer wall of the screw conveyor and the inner wall of the scraper. The waste soil is transported upward by the screw conveyor and discharged into a transport vehicle through the outlet of the screw conveyor, thereby reducing the difficulty for construction workers to clean up the waste soil and improving the construction efficiency of high embankment subgrades.

[0018] Preferably, a serrated triangular plate is fixed to the bottom of the opening of the scraper; the serrated triangular plate improves the sharpness of the opening of the scraper, and the inclined serrated triangular plate facilitates the entry of waste soil into the interior of the scraper, thereby improving the scraper's cleaning effect on waste soil.

[0019] Preferably, the scraper blade has multiple vertical protrusions evenly fixed to the side near the excavator body, and the side of the vertical protrusions near the opening of the scraper blade has an arc-shaped chamfer; the multiple vertical protrusions squeeze and cut the side wall after excavation, press the side wall tightly, and reduce the probability of the side wall collapsing and falling.

[0020] Preferably, the trimming plate has multiple mounting slots evenly distributed in the middle, and connecting columns are slidably installed inside the mounting slots. Multiple dispersing blades are evenly fixed to the bottom surface of some of the connecting columns. A fixing plate is bolted to the side of the trimming plate near the opening of the mounting slot. The trimming plate drives the dispersing blades to move up and down, breaking up the soil in the cut-off portion, improving the degree of soil dispersion, which is beneficial for the conveyor conveyor and improves the cleaning effect of waste soil.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The present invention discloses a construction process and device for high embankment subgrade, comprising an excavator body, a trimming plate, an arc-shaped triangular cutter, a sliding column, a cross plate, a sliding groove, a panel, a first gear, a rotating rod, a motor, a second gear, and a synchronous belt. The excavator body's boom presses down the arc-shaped triangular cutter to cut into the embankment slope. The excavator body moves horizontally along the embankment. Simultaneously, the motor drives the second gear to rotate, which in turn drives the synchronous belt to rotate, causing the first gears on both sides to rotate synchronously. This causes the rotating rods on both sides to perform circular motion, driving the two ends of the arc-shaped triangular cutter to perform up-and-down undulating motion, thereby improving the cutting efficiency and trimming effect of the arc-shaped triangular cutter on the embankment slope.

[0023] 2. The high embankment roadbed construction technology and its construction device described in this invention, by setting up a scraper, a screw conveyor and an inclined baffle; after the waste soil is collected inside the scraper, it is blocked and guided by the inclined baffle, so that when the waste soil gathers at the inlet of the screw conveyor, the waste soil is transported upward by the screw conveyor, and the waste soil is discharged into the transport vehicle through the outlet of the screw conveyor, thereby reducing the difficulty of construction personnel to clean up the waste soil and improving the construction efficiency of high embankment roadbeds. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0026] Figure 2 This is a perspective view of the trimming unit in Embodiment 1 of the present invention;

[0027] Figure 3 This is an exploded view of the trimming unit in Embodiment 1 of the present invention;

[0028] Figure 4 This is a perspective view of the horizontal plate and bearing in Embodiment 1 of the present invention;

[0029] Figure 5 This is a perspective view of the arc-shaped triangular cutter in Embodiment 1 of the present invention;

[0030] Figure 6 This is a perspective view of the soil scraper in Embodiment 1 of the present invention;

[0031] Figure 7 This is a perspective view of the trimming plate of Embodiment 2 of the present invention;

[0032] Figure 8 This is an exploded view of the trimming plate of Embodiment 2 of the present invention;

[0033] Figure 9 This is a flowchart of the construction process of the present invention;

[0034] In the diagram: 1. Excavator body; 2. Crossbeam; 3. Dressing plate; 4. Arc-shaped triangular cutter; 5. Sliding column; 6. Horizontal plate; 7. Slide groove; 8. Panel; 9. Gear No. 1; 10. Rotary rod; 11. Motor; 12. Gear No. 2; 13. Synchronous belt; 14. Circular bar; 15. Bearing; 16. Tooth; 17. Scraper; 18. Screw conveyor; 19. Inlet; 20. Inclined baffle; 21. Serrated triangular plate; 22. Vertical protrusion; 23. Mounting groove; 24. Connecting column; 25. Dispersing cutter; 26. Fixing plate. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] Example 1

[0037] like Figure 9 As shown in the embodiment of the present invention, a high embankment roadbed construction process includes the following steps:

[0038] S1: Subgrade foundation treatment, the ground is excavated into steps, each step is not less than 2m wide, and a cross slope of 2% to 4% is provided; the foundation treatment method is to remove soft plastic silty clay, impact and compact hard silty clay foundation, backfill with crushed stone and compact it evenly with a compaction degree of not less than 90%, and the bearing capacity of the foundation after compaction is not less than 240kPa.

[0039] S2: Roadbed filling will be constructed using a full-width cross-section and longitudinally layered filling method. Fill material will be transported using excavators and dump trucks, spread by bulldozers and graders, and compacted in layers using vibratory rollers. The work will be organized according to the "three-stage, four-section, eight-process" operation method, ensuring balanced execution of all operations. The construction sequence, process progress, and key process cycles will be rationally arranged to ensure close and continuous operation of excavation, loading, transportation, unloading, and compaction processes, avoiding construction interference and overlapping. Roadbed filling precautions: The filling height must be controlled in layers parallel to the road surface. The paving operation should be carried out in layers. To ensure sufficient compaction at the edge of the embankment after the roadbed slope is repaired, the width of each layer of fill material should exceed the design width of the embankment by 300mm on each side. When the natural transverse or longitudinal slope of the ground is steeper than 1:5, the original ground should be excavated into steps. The width of the steps should meet the needs of paving and compaction equipment operation and should not be less than 2m. The top of the steps should be made into an inward slope of 2% to 4%. Large pieces of hard material that cannot be crushed by the compaction equipment should be removed or broken. The maximum size of the broken hard material should not exceed 2 / 3 of the thickness of the compacted layer and should be evenly distributed to facilitate compaction. The required compaction degree must be achieved; when the strength of the stone in the natural soil mixture is greater than 20 MPa, the maximum particle size of the stone shall not exceed 2 / 3 of the compacted layer thickness, and any stones exceeding this limit should be removed; when the stone is soft rock (strength less than 15 MPa), the maximum particle size of the stone shall not exceed the compacted layer thickness, and any stones exceeding this limit should be crushed; soil-rock mixtures with significant differences in permeability after compaction should be filled in layers or sections, and longitudinal sectional filling is not recommended; if longitudinal sectional filling is necessary, the compacted, well-permeable soil-rock mixture should be placed on both sides of the embankment; after the subgrade surface is shaped and compacted, there should be no obvious wheel tracks, no... The slope should be soft and elastic with smooth edges, straight edges, dense and compacted slopes, and smooth and stable curves. When filling the rockfill subgrade, the stones should be placed flat and close together with the larger surface facing down, and all gaps should be filled with small stones or stone chips. Oversized stones should be crushed before filling. The particle size of the fill material should not exceed 50cm, and the maximum particle size should not exceed 2 / 3 of the layer thickness. Bulldozers should be used for paving, and large-tonnage road rollers should be used for compaction. The degree of compaction should be controlled based on the data obtained from the test section and the amount of settlement. The required layer thickness of the embankment subgrade should be filled and compacted in layers, and an impact vibratory roller should be used for reinforcement every 2 meters of filling height.

[0040] S3: Embankment slope repair. Check the centerline position, width, longitudinal slope, transverse slope, side slope and corresponding elevation of the roadbed according to the design drawings. When repairing the slope that needs to be reinforced, reserve the reinforcement position. For sections where the fill is insufficient or the slope is eroded by rainwater and small gullies are formed, adopt the method of digging steps on the slope, filling in layers and carefully compacting. Use construction equipment to repair the embankment slope. Move the excavator body 1 to the embankment slope. The boom of the excavator body 1 drives the repair unit to the repair position. The motor 11 drives the first gear 9 on both sides to rotate synchronously through the transmission of the second gear 12 and the synchronous belt 13. Drive the sliding column 5 on both sides to slide up and down in sequence, drive the arc-shaped triangular cutter 4 to make up and down inclined cuts. At the same time, the excavator body 1 moves along the embankment slope to make continuous cutting and repair.

[0041] S4: Waste soil cleanup. The soil cut off during trimming is collected by the scraper 17. At the same time, the screw conveyor 18 transports the collected soil upwards, and then it is loaded and transported away by a transport vehicle.

[0042] like Figures 1 to 3 As shown, a high embankment roadbed construction device is applicable to the aforementioned high embankment roadbed construction process. The device includes an excavator body 1; a trimming unit is hinged to the end of the boom of the excavator body 1; the trimming unit includes a crossbeam 2; a trimming pressure plate 3 is provided at one end of the bottom surface of the crossbeam 2, and an arc-shaped triangular cutter 4 is located on the bottom side of the trimming pressure plate 3 near the excavator body 1; in this embodiment, the excavator body 1 is a common tracked excavator, and the bucket is replaced with the trimming unit; during operation, the excavator body 1 is moved to the slope of the embankment, the boom of the excavator body 1 drives the trimming unit to the trimming location, the boom of the excavator body 1 presses down the arc-shaped triangular cutter 4 to cut into the slope of the embankment, the excavator body 1 moves horizontally along the embankment, driving the arc-shaped triangular cutter 4 to move horizontally, cutting off the overfill width on both sides of the roadbed, which not only improves the construction efficiency of the high embankment roadbed, but also reduces the probability of over-excavation or under-excavation of the overfill width on both sides of the roadbed.

[0043] like Figures 2 to 4As shown, sliding columns 5 are hinged to both sides of the top surface of the trimming plate 3. The sliding columns 5 slide through the side protrusions of the crossbeam 2. A cross plate 6 is fixed to the middle of the sliding column 5. A groove 7 is opened in the middle of the cross plate 6. A pair of inserts 8 are fixed to the top surface of the crossbeam 2 near the trimming plate 3. The top of the sliding column 5 slides through the top of the insert 8. A first gear 9 is rotatably installed in the middle of the side of the insert 8 near the cross plate 6. Rotating rods 10 are rotatably installed on the side of the first gear 9 near the cross plate 6 on both sides. The rotating rods 10 on both sides are arranged opposite each other. The outer ring of the rotating rod 10 slides in contact with the inner wall of the groove 7. A motor 11 is fixed to the top surface of the crossbeam 2 near the trimming plate 3. The motor 11 is located between the two inserts 8. A second gear 12 is fixed to the outer ring of the rotating shaft of the motor 11. A synchronous belt 13 is fitted around the outer ring of wheel 12 and gear 9. During operation, the boom of the excavator body 1 presses down the arc-shaped triangular cutter 4 to cut into the slope of the embankment. The excavator body 1 moves horizontally along the embankment. At the same time, the motor 11 drives gear 12 to rotate, which drives the synchronous belt 13 to rotate, which drives gear 9 on both sides to rotate synchronously. This causes the rotating rods 10 on both sides to make circular motions, and the two rotating rods 10 are 180 degrees apart. One rotating rod 10 drives the inlay plate 8 to move upward. Through the transmission of the sliding column 5, it drives one end of the trimming plate 3 to move upward. The other rotating rod 10 drives the inlay plate 8 to move downward. Through the transmission of the sliding column 5, it drives the other end of the trimming plate 3 to move downward. This causes the two ends of the arc-shaped triangular cutter 4 to make up-down undulating motions, thereby improving the cutting efficiency and trimming effect of the arc-shaped triangular cutter 4 on the embankment slope.

[0044] like Figures 2 to 4 As shown, an annular bar 14 is fixedly connected to the outer ring of the middle part of the slide groove 7, and a pair of bearings 15 are rotatably installed on the outer ring of the rotating rod 10. The outer ring of the bearings 15 slides in contact with the inner wall of the slide groove 7, and the pair of bearings 15 are located on both sides of the annular bar 14. By setting the bearings 15, the friction between the rotating rod 10 and the slide groove 7 is reduced, the efficiency of the rotating rod 10 sliding inside the slide groove 7 is improved, thereby improving the accuracy of the sliding of the two sliding columns 5. By setting the two bearings 15 and the annular bar 14, the probability of the rotating rod 10 disengaging from the inside of the slide groove 7 is reduced.

[0045] like Figure 2 , Figure 3 and Figure 5 As shown, the arc-shaped triangular cutter 4 has multiple teeth 16 evenly fixed to its arc-shaped side, and the outer side of the teeth 16 is provided with an inclined cutting edge; the teeth 16 improve the sharpness of the arc-shaped side of the arc-shaped triangular cutter 4 and improve the cutting effect of the arc-shaped triangular cutter 4 on the embankment slope.

[0046] like Figures 1 to 3As shown, a scraper 17 is fixed to the other end of the bottom surface of the crossbeam 2. The bottom horizontal height of the scraper 17 is at the same level as the bottom horizontal height of the arc-shaped triangular cutter 4. During operation, the arc-shaped triangular cutter 4 cuts down the width of the overfill on the embankment slope, and the falling waste soil is scooped up by the scraper 17 moving horizontally, so that the waste soil is collected inside the scraper 17, which makes it easier for the user to clean up the waste soil and improves the construction efficiency of the construction personnel.

[0047] like Figures 1 to 3 As shown, a screw conveyor 18 is vertically fixed to the side of the scraper 17 away from the arc-shaped triangular cutter 4. The bottom of the screw conveyor 18 is provided with a soil inlet 19 near the arc-shaped triangular cutter 4. An inclined baffle 20 is fixed between the outer wall of the screw conveyor 18 and the inner wall of the scraper 17. During operation, after the waste soil is collected inside the scraper 17, it is blocked and guided by the inclined baffle 20, so that when the waste soil gathers at the soil inlet 19 of the screw conveyor 18, it is transported upward by the screw conveyor 18. The waste soil is discharged into the transport vehicle through the outlet of the screw conveyor 18 and transported out, thereby reducing the difficulty of cleaning up waste soil for construction workers and improving the construction efficiency of high embankment subgrade.

[0048] like Figure 2 , Figure 3 and Figure 6 As shown, a serrated triangular plate 21 is fixed to the bottom of the opening of the scraper 17; the serrated triangular plate 21 improves the sharpness of the opening of the scraper 17, and the inclined serrated triangular plate 21 facilitates the entry of waste soil into the interior of the scraper 17, thereby improving the cleaning effect of the scraper 17 on waste soil.

[0049] like Figure 6 As shown, the scraper 17 has multiple vertical protrusions 22 evenly fixed on the side near the excavator body 1. The side of the vertical protrusions 22 near the opening of the scraper 17 has an arc-shaped chamfer. When working, the scraper 17 moves horizontally, which drives the multiple vertical protrusions 22 to squeeze and cut the excavated side wall, press the side wall tightly, and reduce the probability of the side wall collapsing and falling.

[0050] Example 2

[0051] like Figures 7 to 8As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a plurality of mounting grooves 23 are evenly provided in the middle of the trimming plate 3, a connecting column 24 is slidably installed inside the mounting groove 23, a plurality of dispersing blades 25 are evenly fixed to the bottom surface of some of the connecting columns 24, and a fixing plate 26 is bolted to the side of the trimming plate 3 near the opening of the mounting groove 23; during operation, when the arc-shaped triangular cutter 4 cuts off the width of the overfill on both sides of the roadbed, at the same time, the trimming plate 3 drives the dispersing blades 25 to move up and down, breaking up the soil of the cut-off part, improving the degree of soil dispersion, which is conducive to the conveying of the screw conveyor 18 and improving the cleaning effect of waste soil.

[0052] Working principle: The ground is excavated into steps, each step being at least 2m wide, with an inward slope of 2% to 4%. The foundation treatment involves removing soft plastic silty clay, compacting hard silty clay foundation with impact rollers, backfilling with crushed stone and compacting it evenly with a compaction degree of not less than 90%, and ensuring the foundation bearing capacity is not less than 240kPa after compaction. The construction method is to fill the entire width of the cross section and layer it longitudinally. The fill material is transported by excavators and dump trucks, spread by bulldozers and graders, filled in layers, and compacted by vibratory rollers.

[0053] The excavator body 1 is moved to the embankment slope. The boom of the excavator body 1 drives the trimming unit to the trimming area. The boom of the excavator body 1 presses down the arc-shaped triangular cutter 4 and cuts into the embankment slope. The excavator body 1 moves horizontally along the embankment, driving the arc-shaped triangular cutter 4 to move horizontally. At the same time, the motor 11 drives the second gear 12 to rotate, drives the synchronous belt 13 to rotate, drives the first gear 9 on both sides to rotate synchronously, and drives the rotating rods 10 on both sides to make circular motion. The two rotating rods 10 are 180 degrees apart. One rotating rod 10 drives the panel 8 to move upward. Through the transmission of the sliding column 5, it drives one end of the trimming plate 3 to move upward. The other rotating rod 10 drives the panel 8 to move downward. Through the transmission of the sliding column 5, it drives the other end of the trimming plate 3 to move downward. This causes the two ends of the arc-shaped triangular cutter 4 to make up-down undulating motion, cutting off the width of the overfill on both sides of the roadbed.

[0054] The falling waste soil is scooped up by the horizontal movement of the scraper 17, so that the waste soil is collected inside the scraper 17. After being blocked and guided by the inclined baffle 20, the waste soil gathers at the inlet 19 of the screw conveyor 18. The screw conveyor 18 then transports the waste soil upwards, and the waste soil is discharged into the transport vehicle through the outlet of the screw conveyor 18. This not only improves the construction efficiency of high embankment roadbed, but also reduces the probability of over-excavation or under-excavation on both sides of the roadbed.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction device for high embankment subgrades, characterized in that: Includes an excavator body (1); the boom end of the excavator body (1) is hinged with a trimming unit; the trimming unit includes a crossbeam (2); a trimming pressure plate (3) is provided at one end of the bottom surface of the crossbeam (2), and the bottom of the trimming pressure plate (3) near the excavator body (1) is an arc-shaped triangular cutter (4). The top surface of the trimming plate (3) is hinged with sliding columns (5) on both sides. The sliding columns (5) slide through the side protrusions of the crossbeam (2). A cross plate (6) is fixed to the middle of the sliding column (5). A groove (7) is opened in the middle of the cross plate (6). A pair of inserts (8) are fixed to the top surface of the crossbeam (2) near the trimming plate (3). The top of the sliding column (5) slides through the top of the insert (8). A first gear (9) is rotatably installed in the middle of the side of the insert (8) near the cross plate (6). The first gear (9) is mounted on both sides. A rotating rod (10) is rotatably mounted on one side of the gear (9) near the cross plate (6). The rotating rods (10) on both sides are arranged opposite each other. The outer ring of the rotating rod (10) slides in cooperation with the inner wall of the slide groove (7). A motor (11) is fixedly connected to the top surface of the cross beam (2) near the trimming plate (3). The motor (11) is located between two inserts (8). A second gear (12) is fixedly connected to the outer ring of the rotating shaft of the motor (11). A synchronous belt (13) is fitted on the outer ring of the second gear (12) and the first gear (9). The other end of the bottom surface of the crossbeam (2) is fixed with a soil scraper (17), and the bottom horizontal height of the soil scraper (17) is at the bottom horizontal height of the arc-shaped triangular cutter (4). A screw conveyor (18) is vertically fixed to the side of the scraper (17) away from the arc-shaped triangular cutter (4). A soil inlet (19) is opened on the bottom of the screw conveyor (18) near the arc-shaped triangular cutter (4). An inclined baffle (20) is fixed between the outer wall of the screw conveyor (18) and the inner wall of the scraper (17).

2. The high embankment roadbed construction device according to claim 1, characterized in that: The outer ring of the middle part of the slide groove (7) is fixedly connected to an annular bar (14), and a pair of bearings (15) are rotatably installed on the outer ring of the rotating rod (10). The outer ring of the bearings (15) slides in cooperation with the inner wall of the slide groove (7), and the pair of bearings (15) are located on both sides of the annular bar (14).

3. The high embankment roadbed construction device according to claim 1, characterized in that: The arc-shaped triangular cutter (4) has multiple teeth (16) evenly fixed on its arc-shaped side, and the outer side of the teeth (16) is provided with an inclined cutting edge.

4. The high embankment roadbed construction device according to claim 1, characterized in that: A serrated triangular plate (21) is fixed to the bottom of the opening of the scraper (17).

5. A construction device for high embankment subgrade according to claim 1, characterized in that: The scraper shovel (17) has multiple vertical protrusions (22) evenly fixed on one side near the excavator body (1), and the vertical protrusions (22) have an arc-shaped chamfer on one side near the opening of the scraper shovel (17).

6. The high embankment roadbed construction device according to claim 1, characterized in that: The trimming plate (3) has a plurality of mounting grooves (23) evenly opened in the middle. A connecting column (24) is slidably installed inside the mounting groove (23). A plurality of dispersing blades (25) are evenly fixed to the bottom surface of some of the connecting columns (24). A fixing plate (26) is bolted to the side of the trimming plate (3) near the opening of the mounting groove (23).

7. A construction technique for high embankment roadbeds, characterized in that: The construction process employs a high embankment subgrade construction device as described in any one of claims 1-6, and the construction process includes the following steps: S1: Subgrade foundation treatment, the ground is excavated into steps, each step is not less than 2m wide, and a cross slope of 2% to 4% is provided; the foundation treatment method is to remove soft plastic silty clay, impact and compact hard silty clay foundation, backfill with crushed stone and compact it evenly with a compaction degree of not less than 90%, and the bearing capacity of the foundation after compaction is not less than 240kPa. S2: Roadbed filling is carried out by a method of full-width cross-section and longitudinal layer filling; the fill material is transported by excavators and dump trucks, spread by bulldozers and graders, filled in layers, and compacted by vibratory rollers. S3: Embankment slope repair. The embankment slope is repaired using construction equipment. The excavator body (1) is moved to the embankment slope. The boom of the excavator body (1) drives the repair unit to the repair location. The motor (11) drives the first gear (9) on both sides to rotate synchronously through the transmission of the second gear (12) and the synchronous belt (13). This drives the sliding columns (5) on both sides to slide up and down in sequence, driving the arc-shaped triangular cutter (4) to make up and down inclined cuts. At the same time, the excavator body (1) moves along the embankment slope to make continuous cutting and repair. S4: Waste soil cleanup, the soil cut off is collected by the scraper (17), and at the same time, the screw conveyor (18) transports the collected soil upwards, and then it is loaded and transported away by the transport vehicle.

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