Auxiliary feeding equipment for aeolian sand roadbed construction and construction method

Abstract

The application relates to an auxiliary feeding equipment for aeolian sand roadbed construction and a construction method, wherein a main technical scheme is an auxiliary feeding equipment for aeolian sand roadbed construction, which comprises a conveying cylinder, two first augers and two walking mechanisms, the two walking mechanisms are respectively located on the two sides of a roadbed area, a rotating platform is arranged on the walking mechanism, a lifting mechanism is arranged on the rotating platform, a hopper is arranged on the lifting mechanism, the conveying cylinder is arranged along the width of the roadbed area, the two ends of the conveying cylinder are connected with the hoppers on the two walking mechanisms respectively, the first augers are located in the conveying cylinder, one end of each of the two first augers extends into the two hoppers respectively, and the hopper is provided with a first driving motor for driving the first auger to rotate; the conveying cylinder is provided with a long-strip-shaped discharging port which is arranged in an axial direction of the conveying cylinder; and the conveying cylinder is provided with a flattening shovel edge. The application can reduce the damage to the formed roadbed.

Description

Technical Field

[0001] This application relates to the field of aeolian sand construction, and in particular to an auxiliary material feeding device and construction method for aeolian sand roadbed construction. Background Technology

[0002] In desert regions, the main fill material for roadbed construction is locally sourced aeolian sand. Because aeolian sand is loose under natural conditions, its cohesion is essentially zero, resulting in poor shear resistance and shear dilatation.

[0003] Therefore, the construction of aeolian sand roadbed is quite difficult. It often requires dump trucks to transport sand from the sand yard to the vicinity of the roadbed area, and then use tracked loaders to fill the sand onto the roadbed area. The sand is then leveled, watered, and compacted in sequence to form the first sand layer. The construction is then repeated, and the sand is filled layer by layer to form the roadbed.

[0004] However, tracked loaders can damage easily formed roadbeds when driving, turning, or making U-turns on sand, thus affecting the roadbed construction results. Summary of the Invention

[0005] To reduce damage to the already formed sand layer of the roadbed, this application provides an auxiliary material feeding device and construction method for the construction of aeolian sand roadbed.

[0006] This application provides an auxiliary material feeding device for the construction of aeolian sand roadbed, which adopts the following technical solution:

[0007] An auxiliary material feeding device for aeolian sand roadbed construction includes a conveying cylinder, two first augers, and two traveling mechanisms. The two traveling mechanisms are located on both sides of the roadbed area. Each traveling mechanism has a rotating platform, a lifting mechanism, and a hopper. The conveying cylinder is set along the width of the roadbed area, and both ends of the conveying cylinder are connected to the hoppers on the two traveling mechanisms. The first augers are located inside the conveying cylinder, and one end of each of the two first augers extends into the two hoppers. Each hopper is equipped with a first drive motor for driving the first augers to rotate. The conveying cylinder has an elongated discharge port that extends along the axial direction of the conveying cylinder. The conveying cylinder is equipped with a leveling shovel edge.

[0008] By adopting the above technical solution, when filling the sand layer, the traveling mechanism is located on the traveling area, and the conveying cylinder is suspended directly above the roadbed area. The conveying cylinder is set along the width direction of the roadbed area, and sand is poured into the hopper. The first drive motor drives the first auger to rotate, and the first auger conveys the sand in the hopper to the conveying cylinder. As the sand moves from the end of the conveying cylinder towards the middle of the conveying cylinder, the sand gradually falls from the long strip discharge port to the roadbed area, thus laying a sand layer on the roadbed area. At the same time, the traveling mechanism moves along the length direction of the roadbed area to evenly cover the roadbed area with the sand layer, thereby avoiding direct mechanical construction on the roadbed area, reducing damage to the sand layer in the roadbed area. Furthermore, the uniform material laying method makes the sand layer more uniform and the sand layer more stable, so as to improve the bearing capacity of the roadbed.

[0009] Secondly, after the sand layer is laid, the lifting mechanism can be used to lower the conveyor cylinder so that the leveling shovel edge on the conveyor cylinder comes into contact with the sand layer. Then the traveling mechanism is started, which drives the leveling shovel edge of the conveyor cylinder to move along the length of the roadbed area. The leveling shovel edge flattens the upper surface of the sand layer, thereby simplifying the construction and improving the construction efficiency.

[0010] Optionally, the opening width of the discharge port gradually increases from both ends of the conveying cylinder to the middle of the conveying cylinder.

[0011] By adopting the above technical solution, the amount of sand near the end of the conveying cylinder is greater, while the amount of sand near the middle of the conveying cylinder is less. Therefore, by setting the opening width of the discharge port to vary, the amount of sand falling can be balanced, making the amount of sand falling along the length of the conveying cylinder more even, thereby further improving the uniformity of sand layer filling.

[0012] Optionally, one of the long sides of the discharge port is set as a straight side, and the flattening shovel edge is fixed on the straight side; the end of the conveying cylinder is rotatably connected to the hopper around the axis of the conveying cylinder, and a first hydraulic cylinder is provided between the hopper and the outer wall of the conveying cylinder, the first hydraulic cylinder being used to change the rotation angle of the conveying cylinder; a gearbox is provided between the first drive motor and the first auger.

[0013] By adopting the above technical solution, the lifting mechanism lowers the hopper and the conveying cylinder, and adjusts the rotation angle of the conveying cylinder through the first hydraulic cylinder, so that the flattening shovel edge on the conveying cylinder abuts against the sand layer. The traveling mechanism starts, driving the flattening shovel edge of the conveying cylinder to move along the length of the roadbed area. The flattening shovel edge flattens the upper surface of the sand layer, and the flattened sand material enters the conveying cylinder through the discharge port. Through the gearbox, the first auger rotates in the opposite direction to transport the flattened sand material back into the hopper for the next sand layer filling.

[0014] Depending on the actual working conditions, the speed and direction of the first auger can be controlled by the gearbox to move the flattened sand in the conveying cylinder longitudinally, so as to transport the sand to the depression area on the sand layer, that is, to repair the sand layer.

[0015] Furthermore, by using the first hydraulic cylinder to drive the conveying cylinder to swing back and forth periodically, the range of sand drop points can be expanded, thereby further improving the uniformity of material feeding.

[0016] Optionally, the bottom of the outer circumference of the conveying cylinder is recessed into an inwardly concave arc surface. The discharge port is located in the middle of the inwardly concave arc surface. The hopper is equipped with a second hydraulic cylinder and a swing arm. The ends of the swing arms of the two hoppers are connected to a rotating shaft. The second hydraulic cylinder is used to change the position of the swing arm. The rotating shaft is located directly below the inwardly concave arc surface and is parallel to the conveying cylinder. The end of the swing arm is equipped with a second drive motor for driving the rotating shaft to rotate. The outer circumference of the rotating shaft is fixed with multiple circumferentially evenly arranged partitions. An accommodating chamber is formed between adjacent partitions. The virtual outer circle formed by the free sides of each partition is adapted to the inwardly concave arc surface, and the arc length of the inwardly concave arc surface is greater than or equal to the arc length of the virtual outer circle formed by the two accommodating chambers. The end of the conveying cylinder is rotatably connected to the hopper around the axis of the conveying cylinder. A first hydraulic cylinder is provided between the hopper and the outer wall of the conveying cylinder. The first hydraulic cylinder is used to change the rotation angle of the conveying cylinder. A gearbox is provided between the first drive motor and the first auger.

[0017] By adopting the above technical solution, the sand in the conveying cylinder continuously falls into the receiving chamber through the discharge port. Since the second drive motor rotates at a relatively slow speed, the sand has sufficient time to fill the receiving chamber. After the receiving chamber filled with sand moves from the concave arc surface, the concave arc surface will scrape the excess sand in the receiving chamber into the next adjacent receiving chamber, thereby ensuring that the amount of sand in the receiving chamber is constant. After the receiving chamber moves to a certain angle, the sand in the receiving chamber falls into the roadbed area under the action of gravity. As the rotating shaft rotates, the next receiving chamber continues to receive sand and drop the sand. In this way, it can be ensured that the amount of sand discharged each time is constant and the discharge frequency is stable, thereby improving the uniformity of sand layer laying.

[0018] Secondly, the second hydraulic cylinder changes the position of the rotating shaft by means of a rocker arm, so that the rotating shaft moves to the horizontal side of the conveying cylinder, so that the conveying cylinder can be moved down to the leveled state.

[0019] Optionally, the rotating shaft is a tubular structure, comprising multiple first and second tube sections arranged alternately. The partition is divided into multiple first and second blocking units along its length. The first blocking unit is fixed to the first tube section, and the second blocking unit is fixed to the second tube section. Both ends of the first tube section are coaxially fixed with circular plates. The sides of the first and second blocking units respectively abut against the end faces of the circular plates. The circular plates of two adjacent first tube sections are fixedly connected by a crossbar. A rotating rod passes through the rotating shaft. The first tube section is rotatably connected to the rotating rod coaxially, and the second tube section is fixedly connected to the rotating rod. Two second drive motors are provided and located at the ends of the two swing rods respectively. One second drive motor is used to drive the rotating rod to rotate, and the other second drive motor is used to drive one of the first tube sections to rotate.

[0020] When sand falls onto the roadbed, due to the height difference, it easily results in a phenomenon where the surrounding area of ​​the landing point contains coarse-grained material, while the center contains fine-grained material. Therefore, by adopting the above-mentioned technical solution, one of the second drive motors drives each second section of the pipe to rotate forward together via a rotating rod, while the other second drive motor drives each first section of the pipe to rotate in the opposite direction. In this way, the sand landing points in the receiving chambers of each first and second section of the pipe are arranged at intervals, and the adjacent landing point ranges partially overlap. This ensures that the coarse-grained material in the receiving chamber of the first section of the pipe will cover the fine-grained material in the sand of the second section of the pipe, and vice versa. This increases the mixing degree of fine and coarse-grained material in the sand layer, thereby improving the uniformity of the sand layer and making the sand layer more stable, which in turn improves the bearing capacity of the roadbed.

[0021] Optionally, a water spraying mechanism is also included, which includes two spray pipes parallel to the axis of the conveying cylinder. The two spray pipes are located on both sides of the conveying cylinder, and the ends of the spray pipes are connected to water inlet hoses. The spray pipes are provided with multiple first spray holes and multiple second spray holes. The first spray holes face 5-10cm directly below the discharge port, and the second spray holes face 20-30cm directly below the discharge port.

[0022] By adopting the above technical solution and setting up a water spraying mechanism to spray water on the sand flow during the feeding process, it is easier to improve the moisture content and moisture content uniformity, thereby reducing the difficulty and cycle of subsequent separate water spraying steps. If the moisture content of this step meets the standard, the subsequent water spraying steps can even be omitted.

[0023] Furthermore, by setting a first spray hole and a second spray hole, the water sprayed from the first spray hole falls to the middle of the sand flow during the falling process, replenishing the sand with some water to increase the moisture content, while the water sprayed from the second spray hole falls to the bottom of the sand flow to reduce dust and replenish the sand with some water, thus taking into account both water replenishment and dust suppression.

[0024] Optionally, the injection pipe is provided with two partitions that divide the inner cavity of the injection pipe into a first chamber, a second chamber, and a third chamber. The volume of the third chamber is larger than that of the second chamber and the first chamber. The first injection hole communicates with the first chamber, and the second injection hole communicates with the second chamber. The injection pipe is provided with multiple third injection holes that communicate with the third chambers. The third injection holes face the side of the injection pipe that is away from the conveying cylinder.

[0025] By adopting the above technical solution, and by setting a third spray hole, the third water flow sprayed by the spray pipe located on the rear side of the conveying cylinder in the forward direction can replenish water to the newly laid sand layer in a timely manner, while the third water flow sprayed by the spray pipe located on the front side of the conveying cylinder in the forward direction can replenish water to the upper surface of the previous sand layer, so as to facilitate the rapid adsorption and bonding of the subsequently laid sand layer, thereby comprehensively improving the water content uniformity and water replenishment effect of the sand layer.

[0026] Optionally, a mixing mechanism is also included, comprising a third drive motor, a fixed pipe, a second auger, a rotating section pipe, and a funnel. The fixed pipe is vertically arranged and located inside the hopper, with a lateral outlet at its lower part. The second auger is located inside the fixed pipe, and the third drive motor drives the second auger to rotate. The rotating sections pipes are coaxially rotatably connected, with the lowermost rotating section pipe coaxially rotatably connected to the upper end of the fixed pipe. The funnel is fixed to the uppermost rotating section pipe, and a spiral blade is fixed to the outer side of the rotating section pipe. The spiral blade has a transfer cavity that communicates with the inner cavity of the rotating section pipe. The long side of the spiral blade away from the direction of rotation has a discharge hole communicating with the transfer cavity. The funnel is used to hold a solidified material, which includes polypropylene fiber, fly ash, loose fill, and limestone powder. The second auger conveys the solidified material downwards and through the lateral outlet of the fixed pipe to the vicinity of the first auger.

[0027] By adopting the above technical solution, the solidified material is poured into the funnel, and the second screw conveyor is started to drive the solidified material in the funnel to move downward. Most of the solidified material is discharged from the side outlet of the fixed pipe to the vicinity of the first screw conveyor, and the solidified material is mixed with the sand as the first screw conveyor is conveyed.

[0028] Furthermore, the solidified material inside the rotating tube enters the central chamber of the spiral blade and is discharged from the outlet. At the same time, the sand pours into the hopper, and the falling sand exerts a force on the spiral blade, causing the rotating tube to rotate. Therefore, the solidified material discharged from the outlet will be evenly distributed in the sand.

[0029] Solidifying materials can improve the stability of sand layers. Specifically, the frictional resistance or interlocking force between the polypropylene fibers in the solidifying material and the aeolian sand, as well as the interlocking force of the polypropylene fibers through bending and interweaving, can significantly improve the shear and tensile strength of the aeolian sand, thereby enhancing the overall stability of the aeolian sand roadbed and playing a role in controlling deformation. Furthermore, fly ash, loose fill, and limestone powder can increase the viscosity of the sand, causing the sand particles to adhere to each other and undergo a "cementing" effect to improve the compaction.

[0030] This application provides a construction method for an auxiliary material feeding device used in the construction of aeolian sand roadbed, which adopts the following technical solution:

[0031] A construction method for an auxiliary material feeding device used in the construction of aeolian sand roadbed includes the following steps:

[0032] S1. Measurement and layout;

[0033] S2. Subgrade treatment: Clear and compact the surface of the subgrade area and the walking areas on both sides of the subgrade area;

[0034] S3, Aeolian Sand Filling: The traveling mechanism is located on the traveling area, and the conveying cylinder is suspended directly above the roadbed area. The conveying cylinder is set along the width direction of the roadbed area. Sand is poured into the hopper. The first drive motor drives the first auger to rotate. The first auger conveys the sand in the hopper to the conveying cylinder. As the sand moves from the end of the conveying cylinder towards the middle of the conveying cylinder, the sand gradually falls from the long strip discharge port to the roadbed area, thereby laying a sand layer on the roadbed area. At the same time, the traveling mechanism moves along the length direction of the roadbed area to evenly cover the roadbed area with the sand layer.

[0035] S4. Sand layer leveling: The lifting mechanism moves the hopper and conveying cylinder down, and adjusts the rotation angle of the conveying cylinder through the first hydraulic cylinder so that the leveling shovel edge on the conveying cylinder abuts against the sand layer. Then the traveling mechanism starts, driving the leveling shovel edge of the conveying cylinder to move along the length of the roadbed area. The leveling shovel edge flattens the upper surface of the sand layer, and the flattened sand material enters the conveying cylinder through the discharge port. The first auger rotates in the opposite direction to transport the flattened sand material back into the hopper for the next sand layer filling.

[0036] S5, Water-soaked sand base: Sprinkle water on the leveled sand layer to increase the moisture content of the sand layer;

[0037] S6. Sand layer compaction: The sand layer is subjected to stabilizing compaction and static compaction in sequence;

[0038] S7. Sand layer sealing: Lay a stone slag sealing layer on the sand layer and compact it.

[0039] Optionally, in step S3, during the process of the first auger discharging sand from the discharge port of the conveying cylinder downwards, the water spraying mechanism is activated, the water inlet hose inputs water into the spray pipe, and the water is sprayed out from the first spray hole and the second spray hole. The water sprayed from the first spray hole falls to the middle of the sand flow during the falling process to replenish some water to the sand and increase the moisture content. The water sprayed from the second spray hole falls to the bottom of the sand flow to reduce dust and replenish some water to the sand.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. By setting up a walking mechanism, hopper, conveying cylinder and first auger, the sand in the hopper can be evenly spread on the roadbed area without directly contacting the sand layer in the roadbed area, thereby reducing mechanical damage to the sand layer. In addition, with the lifting mechanism and leveling shovel, the movement of the conveying cylinder can be used to flatten the upper surface of the sand layer. Furthermore, the flattened sand can be transported back into the hopper by the first auger for the next sand layer filling.

[0042] 2. By setting up a material feeding method where the first and second pipe sections are fed simultaneously but at different points, and by utilizing the different distribution of coarse and fine-grained materials during the feeding process, the coarse-grained materials in the receiving chamber of the first pipe section will cover the fine-grained materials in the sand of the second pipe section, and vice versa. This increases the mixing degree of fine and coarse-grained materials in the sand layer, thereby improving the uniformity of the sand layer and making it more stable, which in turn improves the bearing capacity of the roadbed.

[0043] 3. By setting up a water spraying mechanism to spray water on the sand flow during the feeding process, it is easier to improve the moisture content and moisture content uniformity, thereby reducing the difficulty and cycle of subsequent individual water spraying steps, and also reducing dust.

[0044] 4. By setting up a mixing mechanism, the mixing effect between the solidified material and the sand is greatly improved. In conjunction with the conveying of the first auger, the mixing effect between the solidified material and the sand is further increased, thereby improving the compactness of the sand layer. Attached Figure Description

[0045] Figure 1 This is a front view of the overall structure of Embodiment 1.

[0046] Figure 2 This is a partial cross-sectional view of the conveyor cylinder of Example 1.

[0047] Figure 3 This is a schematic diagram of the overall structure of Example 1.

[0048] Figure 4 This is a schematic diagram of the mixing mechanism in Example 2.

[0049] Figure 5 This is a schematic diagram of the overall structure of Example 3.

[0050] Figure 6 This is a cross-sectional view of Example 3, illustrating the positional relationship between the injection pipe and the delivery cylinder.

[0051] Figure 7 This is a cross-sectional view of the conveyor cylinder in Example 4.

[0052] Figure 8 This is a cross-sectional view of Embodiment 4, illustrating the positional relationship between the receiving chamber and the delivery cylinder.

[0053] Figure 9 This is a schematic diagram of the rotating shaft in Example 4.

[0054] Figure 10 This is a schematic diagram of the rotating shaft in Example 5.

[0055] Figure 11 This is a cross-sectional view of the rotating shaft in Embodiment 5.

[0056] Explanation of reference numerals in the attached drawings: 1. Conveying cylinder; 2. Traveling mechanism; 3. Mixing mechanism; 5. Sprinkling mechanism; 10. Discharge port; 110. Flattening shovel edge; 111. Concave arc surface; 11. First auger; 12. Support seat; 13. First drive motor; 131. Gearbox; 21. Hopper; 211. Rotating seat; 212. First hydraulic cylinder; 213. Ear plate; 22. Rotating platform; 23. Lifting mechanism; 31. Third drive motor; 32. Fixed pipe; 321. Lateral opening; 33. Second auger; 34. Rotating section pipe; 35. Funnel; 36. Spiral blade; 361 51. Discharge port; 51. Injection pipe; 511. First chamber; 512. Second chamber; 513. Third chamber; 514. First injection hole; 515. Second injection hole; 516. Third injection hole; 52. Support; 53. Water inlet hose; 54. Divider plate; 61. Rotating shaft; 611. First pipe section; 612. Second pipe section; 62. Partition plate; 621. First barrier unit; 622. Second barrier unit; 623. Rubber sheet; 63. Receiving chamber; 64. Sealing plate; 65. Swing rod; 66. Second hydraulic cylinder; 67. Circular plate; 68. Crossbar; 69. Rotating rod. Detailed Implementation

[0057] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0058] Embodiment 1 of this application discloses an auxiliary material feeding device for the construction of aeolian sand roadbed.

[0059] Reference Figure 1 and Figure 2 The auxiliary material feeding equipment for the construction of aeolian sand roadbed includes a conveyor cylinder 1, two first screw conveyors 11 and two traveling mechanisms 2. The two traveling mechanisms 2 are located on both sides of the roadbed area. The traveling mechanisms 2 can be tracked or wheeled. The traveling mechanism 2 is equipped with a rotating platform 22, which can rotate around a vertical axis. The rotating platform 22 is equipped with a lifting mechanism 23. The lifting end of the lifting mechanism 23 is fixed with a hopper 21. The lifting mechanism 23 can be a hydraulic cylinder to control the height of the hopper 21.

[0060] like Figure 3 As shown, the conveying cylinder 1 is set along the width of the roadbed area. Both ends of the conveying cylinder 1 are connected to the hoppers 21 on the two traveling mechanisms 2 respectively. Specifically, a rotating ring is fixed coaxially at the opening of the conveying cylinder 1, and a rotating seat 211 is fixed on the outer wall of the hopper 21. The rotating ring and the rotating seat 211 are rotatably connected, and the opening of the conveying cylinder 1 is connected to the inner cavity of the hopper 21.

[0061] like Figure 2 As shown, two first augers 11 are coaxially arranged inside the conveying cylinder 1 and placed on opposite sides. The opposite ends of the two first augers 11 extend into the corresponding hoppers 21. A support seat 12 is fixed in the middle of the conveying cylinder 1. The near ends of the two first augers 11 are rotatably connected to the support seat 12. A first drive motor 13 is fixed on the outer wall of the hopper 21. The first drive motor 13 drives the first augers 11 to rotate through the gearbox 131.

[0062] like Figure 2 As shown, a long strip-shaped discharge port 10 is provided at the bottom of the conveying cylinder 1. The discharge port 10 extends along the axial direction of the conveying cylinder 1, and the opening width of the discharge port 10 gradually increases from both ends of the conveying cylinder 1 to the middle of the conveying cylinder 1. One of the long sides of the opening of the discharge port 10 is a straight side, and a flattening shovel edge 110 is fixed to this straight side.

[0063] like Figure 3 As shown, a first hydraulic cylinder 212 is provided between the hopper 21 and the outer wall of the conveying cylinder 1. The first hydraulic cylinder 212 is used to change the rotation angle of the conveying cylinder 1. Specifically, an ear plate 213 is fixed to the outer wall of the conveying cylinder 1. The cylinder body end of the first hydraulic cylinder 212 is hinged to the outer wall of the hopper 21, and the piston rod end of the first hydraulic cylinder 212 is hinged to the ear plate 213. That is, the extension and retraction of the first hydraulic cylinder 212 is used to drive the deflection of the conveying cylinder 1.

[0064] Example 1 also discloses a construction method for an auxiliary material feeding device for aeolian sand roadbed construction, including the following steps:

[0065] S1. Surveying and setting out: GPS is used for surveying and setting out. First, the boundary line of the roadbed area is set out, and then the boundary line of the aeolian sand filling is set out according to the top surface elevation of the filling layer.

[0066] S2. Subgrade treatment: Clear the surface of the subgrade area and the walking area on both sides of the subgrade area. Use excavators and bulldozers to remove topsoil, humus, weeds, etc. within the occupied area. The surface clearing thickness is 30cm. Then use a 20t double-drive vibratory roller to compact it.

[0067] S3, Aeolian Sand Filling: The traveling mechanism 2 is located on the traveling area, and the conveying cylinder 1 is suspended directly above the roadbed area. The conveying cylinder 1 is set along the width direction of the roadbed area. Sand is poured into the hopper 21 by a dump truck or loader. The first drive motor 13 drives the first auger 11 to rotate. The first auger 11 conveys the sand in the hopper 21 to the conveying cylinder 1. As the sand moves from the end of the conveying cylinder 1 towards the middle of the conveying cylinder 1, the sand gradually falls from the elongated discharge port 10 to the roadbed area, thus laying a sand layer on the roadbed area. At the same time, the traveling mechanism 2 moves along the length direction of the roadbed area to evenly cover the roadbed area with the sand layer. In addition, the first hydraulic cylinder 212 can be used to drive the conveying cylinder 1 to swing back and forth periodically, so that the discharge port 10 swings back and forth, which can expand the landing point range of the sand and further improve the uniformity of the material discharge.

[0068] When filling to a point where the roadbed width narrows or a turning point is reached, the misalignment distance between the two traveling mechanisms 2 can be controlled. By using the rotating platform 22, the conveying cylinder 1 can be offset in the horizontal plane to adapt to a narrow roadbed or to make an adaptive turn.

[0069] S4. Sand leveling: The lifting mechanism 23 moves the hopper 21 and the conveying cylinder 1 down, so that the leveling edge 110 of the conveying cylinder 1 abuts against the upper surface of the sand layer. Then, the rotation angle of the conveying cylinder 1 is adjusted by the first hydraulic cylinder 212, so that the leveling edge 110 on the conveying cylinder 1 is embedded in the upper surface of the sand layer, and the leveling edge 110 forms an inclined angle with the horizontal plane to reduce leveling resistance. Then, the traveling mechanism 2 is started, driving the leveling edge 110 of the conveying cylinder 1 to move along the length of the roadbed area, and the leveling edge 110 pushes the upper surface of the sand layer flat.

[0070] Meanwhile, the flattened sand enters the conveying cylinder 1 through the discharge port 10, and the first auger 11 rotates in the opposite direction to transport the flattened sand back into the hopper 21 for the next sand layer filling.

[0071] S5. Water-soaked sand base: Sprinkle water on the leveled sand layer to increase its moisture content. Since the wind is strong and the sun shines during the day, causing rapid moisture loss, the soaking process is carried out at night.

[0072] S6. Sand layer compaction: The sand layer is compacted and statically compacted in sequence. Specifically, the tracked bulldozer is used to compact the sand layer twice, and then a dual-drive roller is used for static compaction. The speed is controlled at 3-4 km / h. The compaction line is carried out from both sides to the middle in a longitudinal back-and-forth manner. The transverse wheel tracks overlap by 1 / 3 of the single wheel width, about 60cm, and the longitudinal overlap is 2m.

[0073] S7. Sand layer sealing: Lay a stone slag sealing layer on the sand layer and compact it.

[0074] The implementation principle of Example 1 is as follows: by setting up the walking mechanism 2, the hopper 21, the conveying cylinder 1 and the first auger 11, the sand in the hopper 21 can be evenly spread on the roadbed area without directly contacting the sand layer in the roadbed area, thereby reducing mechanical damage to the sand layer.

[0075] After the filling is completed, the lifting mechanism 23 and the leveling shovel 110 are used together to push the upper surface of the sand layer flat by moving the conveying cylinder 1. At the same time, the flattened sand can be transported back to the hopper 21 by the first auger 11 for the next filling of the sand layer.

[0076] Example 2

[0077] The difference between Example 2 and Example 1 is that, as Figure 4 As shown, the auxiliary material feeding equipment for the construction of aeolian sand roadbed also includes a mixing mechanism 3, which is set in the hopper 21 and is used to uniformly mix the solidified material into the sand.

[0078] Specifically, such as Figure 4 As shown, the mixing mechanism 3 includes a third drive motor 31, a fixed pipe 32, a second auger 33, a rotating joint pipe 34, and a funnel 35. The fixed pipe 32 is vertically arranged and located inside the hopper 21. The fixed pipe 32 is located on one side of the first auger 11. The lower part of the fixed pipe 32 is provided with a lateral outlet, which faces the first auger 11.

[0079] Each rotating section tube 34 is coaxially rotatably connected to the other, and the lowermost rotating section tube 34 is coaxially rotatably connected to the upper end of the fixed tube 32.

[0080] A spiral blade 36 is fixed on the outer side of the rotating tube 34. The spiral blade 36 has a central transfer cavity, which is connected to the inner cavity of the rotating tube 34. A discharge hole 361 is provided on the long side of the spiral blade 36 away from the rotation direction of the spiral blade 36, and the discharge hole 361 is connected to the central transfer cavity.

[0081] The funnel 35 is fixed on the uppermost rotating section tube 34. The second auger 33 is vertically arranged and passes through the fixed tube 32, the rotating section tube 34 and the funnel 35. The third drive motor 31 is installed at the bottom of the hopper 21 and is used to drive the second auger 33 to rotate.

[0082] In step S3, a solidifying material is placed into the funnel 35. The solidifying material includes polypropylene fiber, fly ash, loose fill and limestone powder. The second screw conveyor 33 rotates to move the solidifying material in the funnel 35 downward. Most of the solidifying material is discharged from the side outlet of the fixed pipe 32 to the vicinity of the first screw conveyor 11. As the first screw conveyor 11 conveys, the solidifying material is mixed with sand.

[0083] Meanwhile, some of the solidified material is also conveyed into the transfer chamber of the spiral blade 36 through the second auger 33 and discharged from the discharge hole 361. At the same time, the loader puts sand into the hopper 21. The falling sand exerts a force on the spiral blade 36, causing the rotating section tube 34 and the spiral blade 36 to rotate. Therefore, the solidified material discharged from the discharge hole 361 will be evenly distributed in the sand.

[0084] The frictional resistance or interlocking force between the polypropylene fibers in the solidified material and the aeolian sand, as well as the interlocking force between the polypropylene fibers due to bending and interweaving, can significantly improve the shear and tensile strength of the aeolian sand, enhance the overall stability of the aeolian sand roadbed, and thus play a role in controlling deformation.

[0085] Furthermore, the fly ash, loose fill, and limestone powder in the solidifying material can increase the cohesiveness of the sand, causing the sand particles to adhere to each other and undergo a "cementing" effect, thereby improving the compaction.

[0086] Example 3

[0087] The difference between Example 3 and Example 1 is that, as Figure 5 As shown, the auxiliary material feeding equipment for the construction of aeolian sand roadbed also includes a water spraying mechanism 5, which is used to replenish water during the falling of sand material, thereby improving the uniformity of moisture content.

[0088] The water spraying mechanism 5 includes two spray pipes 51, which are parallel to the axis of the conveying cylinder 1. The two spray pipes 51 are located on both sides of the conveying cylinder 1 in the direction of travel. The ends of the spray pipes 51 are fixedly connected to the corresponding hoppers 21 by supports 52. Furthermore, the ends of the spray pipes 51 are connected to water inlet hoses 53, which are used to deliver water into the spray pipes 51.

[0089] like Figure 6As shown, the spray pipe 51 is provided with two partition plates 54, which divide the inner cavity of the spray pipe 51 into a first chamber 511, a second chamber 512 and a third chamber 513, wherein the volume of the third chamber 513 is larger than that of the second chamber 512 and the first chamber 511; the spray pipe 51 is provided with a plurality of first spray holes 514, a plurality of second spray holes 515 and a plurality of third spray holes 516, and each of the first spray holes 514, each of the second spray holes 515 and each of the third spray holes 516 are arranged at intervals along the axial direction of the spray pipe 51.

[0090] The first injection hole 514 is connected to the first chamber 511, the second injection hole 515 is connected to the second chamber 512, and the third injection hole 516 is connected to the third chamber 513. The first injection hole 514 is oriented 5-10cm directly below the discharge port 10, the second injection hole 515 is oriented 20-30cm directly below the discharge port 10, and the third injection hole 516 is oriented towards the side of the injection pipe 51 that is away from the conveying cylinder 1.

[0091] In step S3, the sand falling from the conveying cylinder 1 and the watering mechanism 5 spraying water are carried out simultaneously. The water sprayed from the first spray hole 514 falls to the middle of the sand flow during the falling process, replenishing the sand with some water to increase the moisture content. The water sprayed from the second spray hole 515 falls to the bottom of the sand flow to reduce dust and replenish the sand with some water, thus taking into account both water replenishment and dust suppression. The third water flow sprayed from the third spray hole 516 of the spray pipe 51 located on the rear side of the forward direction of the conveying cylinder 1 can replenish the newly laid sand layer in time, while the third water flow sprayed from the third spray hole 516 of the spray pipe 51 located on the front side of the forward direction of the conveying cylinder 1 can replenish the upper surface of the previously laid sand layer, so as to facilitate the rapid adsorption and bonding of the subsequently laid sand layer, thereby comprehensively improving the moisture content uniformity and water replenishment effect of the sand layer.

[0092] The water spraying mechanism 5 sprays water on the sand flow during the feeding process, which makes it easier to improve the moisture content and moisture content uniformity, thereby reducing the difficulty and cycle of subsequent separate water spraying steps. If the moisture content of this step meets the standard, the subsequent water spraying step S5 can even be omitted.

[0093] Example 4

[0094] The difference between Example 4 and Example 1 is that, as Figure 7 As shown, two symmetrical flattening shovels 110 are fixed at the bottom of the outer circumference of the conveying cylinder 1, with the discharge port 10 as the center. The flattening shovels 110 have an inner arc surface, and the two inner arc surfaces are combined to form an inner concave arc surface 111.

[0095] like Figure 8As shown, the hopper 21 is equipped with a second hydraulic cylinder 66 and a swing rod 65. The swing rod 65 is in the shape of a "<". The bent part of the swing rod 65 is hinged to the outer wall of the hopper 21. The cylinder body of the second hydraulic cylinder 66 is hinged to the outer wall of the hopper 21. The end of the piston rod of the second hydraulic cylinder 66 is hinged to one end of the swing rod 65. The other ends of the two swing rods 65 are rotatably connected to a rotating shaft 61. The rotating shaft 61 is parallel to the conveying cylinder 1. The end of the swing rod 65 is equipped with a second drive motor (not shown in the figure) for driving the rotating shaft 61 to rotate.

[0096] Driven by the second hydraulic cylinder 66, the rotating shaft 61 can be moved directly below the concave arc surface 111 via the rocker arm 65, or the rotating shaft 61 can be tilted upwards and moved to one side of the conveying cylinder 1.

[0097] like Figure 9 As shown, a plurality of circumferentially evenly arranged partitions 62 are fixed on the outer circumferential surface of the rotating shaft 61, and a receiving chamber 63 is formed between adjacent partitions 62. Furthermore, a sealing plate 64 is provided at the end of the rotating shaft 61, which is used to close the port of the receiving chamber 63.

[0098] like Figure 8 As shown, the virtual outer circle formed by the free sides of each partition 62 is adapted to the concave arc surface 111, and the arc length of the concave arc surface 111 is greater than or equal to the arc length of the virtual outer circle formed by the two receiving chambers 63.

[0099] Sand continuously flows from the conveying cylinder 1 through the discharge port 10 into the receiving chamber 63, filling it completely. The second drive motor then rotates the rotating shaft 61, transferring the sand-filled receiving chamber 63 from the concave arc surface 111. The concave arc surface 111 then scrapes excess sand from the receiving chamber 63 into the next adjacent receiving chamber 63, ensuring a constant amount of sand within the chamber. After the receiving chamber 63 moves to a certain angle, the sand falls into the roadbed area under gravity. As the rotating shaft 61 rotates, the next receiving chamber 63 continues to receive sand, which then falls. This ensures a constant amount of sand is delivered each time, with a stable delivery frequency, thereby improving the uniformity of the sand layer.

[0100] Example 5

[0101] The difference between Example 5 and Example 4 is that, as Figure 10 , Figure 11As shown, the rotating shaft 61 is a tubular structure, which includes multiple first tube sections 611 and second tube sections 612. The first tube sections 611 and second tube sections 612 are arranged alternately. The partition plate 62 is divided into multiple first blocking units 621 and second blocking units 622 along its own length. The first blocking unit 621 is fixed on the first tube section 611, and the second blocking unit 622 is fixed on the second tube section 612. Both ends of the first tube section 611 are coaxially fixed with circular plates 67. The diameter of the circular plates 67 is equal to the radial width of the first blocking unit 621. The sides of the first blocking unit 621 and the second blocking unit 622 respectively abut against the two end faces of the circular plates 67.

[0102] The circular plates 67 of two adjacent first tube sections 611 are fixedly connected by a crossbar 68. The crossbar 68 is located on the radial outside of the second blocking unit 622, that is, the crossbar 68 and the second blocking unit 622 move without interference in the circumferential direction.

[0103] A rubber sheet 623 is fixed to the free side of the second barrier unit 622. The combined radial width of the rubber sheet 623 and the second barrier unit 622 is greater than or equal to the width of the first barrier unit 621.

[0104] A rotating rod 69 is inserted through the rotating shaft 61. The first section tube 611 is rotatably connected to the rotating rod 69 on the same axis. The second section tube 612 is fixedly connected to the rotating rod 69. Two second drive motors are provided and fixed to the ends of two swing rods 65 respectively (not shown in the figure). One second drive motor is used to drive the rotating rod 69 to rotate, and the other second drive motor is used to drive one of the first section tubes 611 to rotate. The two second drive motors rotate in opposite directions, thereby driving each first section tube 611 and each second section tube 612 to rotate in opposite directions. That is, the unloading direction of the receiving chamber 63 enclosed by two adjacent first barrier units 621 is opposite to the unloading direction of the receiving chamber 63 enclosed by two adjacent second barrier units 622.

[0105] In this way, the sand in the receiving chamber 63 of each first section pipe 611 and the sand in the receiving chamber 63 of each second section pipe 612 are arranged at intervals, and the range of adjacent landing points partially overlaps. When the sand falls, due to the height difference, it is easy to form a phenomenon where the area around the landing point is composed of coarse-grained material and the center of the landing point is composed of fine-grained material. When the range of adjacent landing points partially overlaps, the coarse-grained material in the receiving chamber 63 of the first section pipe 611 will cover the fine-grained material in the sand in the second section pipe 612, and the coarse-grained material in the receiving chamber 63 of the second section pipe 612 will cover the fine-grained material in the sand in the first section pipe 611. This increases the mixing degree of fine-grained and coarse-grained material in the sand layer, thereby improving the uniformity of the sand layer and making the sand layer more stable, so as to improve the bearing capacity of the roadbed.

[0106] The rubber sheet 623 is mainly used to increase the amount of sand that can be contained in the accommodating chamber 63 of the two adjacent second barrier units 622, and the rubber sheet 623 is elastic, which can reduce its rigid collision with the crossbar 68.

[0107] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary material feeding device for construction of aeolian sand roadbed, characterized in that: The system includes a conveying cylinder (1), two first augers (11), and two traveling mechanisms (2). The two traveling mechanisms (2) are located on both sides of the roadbed area. A rotating platform (22) is provided on the traveling mechanism (2), and a lifting mechanism (23) is provided on the rotating platform (22). A hopper (21) is provided on the lifting mechanism (23). The conveying cylinder (1) is set along the width of the roadbed area. Both ends of the conveying cylinder (1) are connected to the hoppers (21) on the two traveling mechanisms (2). The first augers (11) are located inside the conveying cylinder (1), and one end of each of the two first augers (11) extends into the two hoppers (21). The hoppers (21) are equipped with a first drive motor for driving the first augers (11) to rotate. Machine (13); The conveying cylinder (1) has a long strip-shaped discharge port (10), which extends along the axial direction of the conveying cylinder (1); The conveying cylinder (1) is provided with a flattening shovel edge (110); The opening width of the discharge port (10) gradually increases from both ends of the conveying cylinder (1) to the middle of the conveying cylinder (1); One of the long sides of the opening of the discharge port (10) is set as a straight side, and the flattening shovel edge (110) is fixed on the straight side; The end of the conveying cylinder (1) is rotatably connected to the hopper (21) around the axis of the conveying cylinder (1), and a first hydraulic cylinder (212) is provided between the hopper (21) and the outer wall of the conveying cylinder (1), the second A hydraulic cylinder (212) is used to change the rotation angle of the conveying cylinder (1); a gearbox (131) is provided between the first drive motor (13) and the first auger (11); the first drive motor (13) is used to control the forward and reverse rotation of the first auger (11) to realize the recycling of excess sand and the repair of the sand layer respectively; the bottom position of the outer peripheral surface of the conveying cylinder (1) is recessed and formed into an inner concave arc surface (111), the discharge port (10) is located in the middle of the inner concave arc surface (111), the hopper (21) is provided with a second hydraulic cylinder (66) and a swing rod (65), the ends of the swing rods (65) of the two hoppers (21) are connected to a rotating shaft (61), the second hydraulic cylinder The cylinder (66) is used to change the position of the rocker arm (65). The rotating shaft (61) is located directly below the concave arc surface (111). The rotating shaft (61) is parallel to the conveying cylinder (1). The end of the rocker arm (65) is provided with a second drive motor for driving the rotating shaft (61) to rotate. The outer circumferential surface of the rotating shaft (61) is fixed with a plurality of circumferentially evenly arranged partitions (62). An accommodating chamber (63) is formed between adjacent partitions (62). The virtual outer circle formed by the free sides of each partition (62) is adapted to the concave arc surface (111). The arc length of the concave arc surface (111) is greater than or equal to the arc length of the virtual outer circle formed by the two accommodating chambers (63).The rotating shaft (61) is a tubular structure, comprising multiple first tube sections (611) and second tube sections (612). The first tube sections (611) and second tube sections (612) are arranged alternately. The partition plate (62) is divided into multiple first blocking units (621) and second blocking units (622) along its length. The first blocking unit (621) is fixed on the first tube section (611), and the second blocking unit (622) is fixed on the second tube section (612). Both ends of the first tube section (611) are coaxially fixed with circular plates (67). The sides of the first blocking unit (621) and the second blocking unit (622) respectively abut against the two end faces of the circular plates (67). The circular plates (67) of two adjacent first tube sections (611) are fixedly connected by a crossbar (68). A rotating rod (69) passes through the rotating shaft (61). (611) is rotatably connected to the rotating rod (69) on the same axis. The second section tube (612) is fixedly connected to the rotating rod (69). Two second drive motors are provided and are located at the ends of the two swing rods (65). One second drive motor is used to drive the rotating rod (69) to rotate, and the other second drive motor is used to drive one of the first section tubes (611) to rotate. The unloading direction of the receiving chamber (63) enclosed by two adjacent first blocking units (621) is opposite to the unloading direction of the receiving chamber (63) enclosed by two adjacent second blocking units (622). The coarse-grained material in the receiving chamber (63) of the first section tube (611) will cover the fine-grained material in the sand of the second section tube (612), and the coarse-grained material in the receiving chamber (63) of the second section tube (612) will cover the fine-grained material in the sand of the first section tube (611).

2. The auxiliary material feeding equipment for aeolian sand roadbed construction according to claim 1, characterized in that: It also includes a water spraying mechanism (5), which includes two spray pipes (51). The spray pipes (51) are parallel to the axis of the conveying cylinder (1). The two spray pipes (51) are located on both sides of the conveying cylinder (1). The ends of the spray pipes (51) are connected to water inlet hoses (53). The spray pipes (51) are provided with multiple first spray holes (514) and multiple second spray holes (515). The first spray holes (514) are 5-10cm directly below the discharge port (10), and the second spray holes (515) are 20-30cm directly below the discharge port (10).

3. The auxiliary material feeding equipment for aeolian sand roadbed construction according to claim 2, characterized in that: The spray pipe (51) is provided with two partition plates (54), which divide the inner cavity of the spray pipe (51) into a first chamber (511), a second chamber (512) and a third chamber (513). The volume of the third chamber (513) is larger than that of the second chamber (512) and the first chamber (511). The first spray hole (514) is connected to the first chamber (511), and the second spray hole (515) is connected to the second chamber (512). The spray pipe (51) is provided with a plurality of third spray holes (516), which are connected to the third chamber (513). The third spray holes (516) face the side of the spray pipe (51) away from the conveying cylinder (1).

4. The auxiliary material feeding equipment for aeolian sand roadbed construction according to claim 2, characterized in that: It also includes a mixing mechanism (3), which includes a third drive motor (31), a fixed pipe (32), a second auger (33), a rotating section pipe (34), and a funnel (35). The fixed pipe (32) is vertically arranged and located inside the hopper (21). The lower part of the fixed pipe (32) has a lateral outlet. The second auger (33) is located inside the fixed pipe (32). The third drive motor (31) is used to drive the second auger (33) to rotate. The rotating sections (34) are coaxially rotatably connected to each other. The lowermost rotating section pipe (34) is coaxially rotatably connected to the upper end of the fixed pipe (32). The funnel ( 35) Fixed to the uppermost rotating joint tube (34), the rotating joint tube (34) is fixed with a spiral blade (36) on the outside, the spiral blade (36) has a transfer cavity, the transfer cavity is connected to the inner cavity of the rotating joint tube (34), and the long side of the spiral blade (36) away from the rotation direction of the spiral blade (36) is provided with a discharge hole (361) connected to the transfer cavity; the funnel (35) is used to put in the solidified material, which includes polypropylene fiber, fly ash, loose fill and limestone powder, and the second auger (33) is used to convey the solidified material downward and through the side outlet of the fixed tube (32) to the vicinity of the first auger (11).

5. A construction method for an auxiliary material feeding device for aeolian sand roadbed construction according to claim 4, characterized in that: Includes the following steps: S1. Measurement and layout; S2. Subgrade treatment: Clear and compact the surface of the subgrade area and the walking areas on both sides of the subgrade area; S3, Aeolian Sand Filling: The walking mechanism (2) is located on the walking area, and the conveying cylinder (1) is suspended directly above the roadbed area. The conveying cylinder (1) is set along the width direction of the roadbed area and sand is poured into the hopper (21). The first drive motor (13) drives the first auger (11) to rotate. The first auger (11) conveys the sand in the hopper (21) to the conveying cylinder (1). As the sand moves from the end of the conveying cylinder (1) toward the middle of the conveying cylinder (1), the sand gradually falls from the long strip discharge port (10) to the roadbed area, thereby laying a sand layer on the roadbed area. At the same time, the walking mechanism (2) moves along the length direction of the roadbed area to evenly cover the roadbed area with the sand layer. S4. Sand leveling: The lifting mechanism (23) moves the hopper (21) and the conveying cylinder (1) down, and adjusts the rotation angle of the conveying cylinder (1) through the first hydraulic cylinder (212) so that the flattening shovel edge (110) on the conveying cylinder (1) abuts against the sand layer. Then the walking mechanism (2) starts, driving the flattening shovel edge (110) of the conveying cylinder (1) to move along the length of the roadbed area. The flattening shovel edge (110) flattens the upper surface of the sand layer, and the flattened sand enters the conveying cylinder (1) through the discharge port (10). The first auger (11) rotates in the opposite direction to transport the flattened sand back into the hopper (21) for the next sand layer filling. S5, Water-soaked sand base: Sprinkle water on the leveled sand layer to increase the moisture content of the sand layer; S6. Sand layer compaction: The sand layer is subjected to stabilizing compaction and static compaction in sequence; S7. Sand layer sealing: Lay a stone slag sealing layer on the sand layer and compact it.

6. The construction method of the auxiliary material feeding equipment for aeolian sand roadbed construction according to claim 5, characterized in that: In step S3, during the process of the first auger (11) discharging sand from the discharge port (10) of the conveying cylinder (1) downwards, the water spraying mechanism (5) is activated, and the water inlet hose (53) inputs water into the spray pipe (51). Water is sprayed out from the first spray hole (514) and the second spray hole (515). The water sprayed from the first spray hole (514) falls to the middle of the sand flow during the falling process to replenish some water for the sand and increase the moisture content. The water sprayed from the second spray hole (515) falls to the bottom of the sand flow to reduce dust and replenish some water for the sand.

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