A aeolian sand roadbed filling construction device and a construction method thereof

Abstract

The application relates to a aeolian sand roadbed filling construction device which comprises two walking mechanisms, two conveying barrels and two first augers, the two walking mechanisms are respectively arranged on the two sides of a roadbed area, a lifting mechanism is arranged on the walking mechanism, a hopper is arranged on the lifting mechanism, the proximal ends of the two conveying barrels are arranged downwardly and obliquely, the included angle between the conveying barrel and the horizontal plane is 30-45 degrees, the upper end of the conveying barrel is detachably fixedly connected with the bottom of the proximal hopper, the lower ends of the two conveying barrels are detachably fixedly connected through a connecting piece, the conveying barrel has a long-strip-shaped discharging port which is arranged in the axial direction of the conveying barrel and gradually increases in opening width from the upper end of the conveying barrel to the lower end of the conveying barrel; the first auger is arranged in the conveying barrel, one end of each of the two first augers extends into the bottom of the hopper, and the hopper is provided with a first driving motor for driving the first auger to rotate. The application can improve the roadbed filling speed and reduce the damage to the formed roadbed sand layer.

Description

Technical Field

[0001] This application relates to the field of aeolian sand roadbed construction, and in particular to an aeolian sand roadbed filling construction device and its construction method. 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. This process is repeated, filling layer by layer to form the roadbed sand layer. By filling multiple layers of roadbed sand in sequence, the entire roadbed can be completed.

[0004] However, when tracked loaders travel, turn, or make U-turns on existing sand layers to fill new sand layers, they can easily damage the existing sand layers. Summary of the Invention

[0005] In order to reduce the damage to the already formed roadbed sand layer, this application provides a construction device and construction method for aeolian sand roadbed filling.

[0006] This application provides a construction device for filling aeolian sand roadbed, which adopts the following technical solution:

[0007] A construction device for filling aeolian sand roadbed includes two traveling mechanisms, two conveying cylinders, and two first augers. The two traveling mechanisms are located on both sides of the roadbed area. Each traveling mechanism is equipped with a lifting mechanism and a hopper. The two conveying cylinders are inclined downwards at their proximal ends, with an angle of 30-45° between the conveying cylinders and the horizontal plane. The upper end of each conveying cylinder is detachably fixed to the bottom of the proximal hopper, and the lower ends of the two conveying cylinders are detachably fixed to each other via connectors. Each conveying cylinder has an elongated discharge port that extends axially along the conveying cylinder, with the opening width gradually increasing from the upper end to the lower end of the conveying cylinder. The first augers are located inside the conveying cylinders, with one end of each of the two first augers extending into the bottom of the two hoppers. Each hopper is equipped with a first drive motor for driving the first augers to rotate.

[0008] By adopting the above technical solution, when filling the sand layer, the traveling mechanism is located on the traveling area, and both conveying cylinders are suspended directly above the roadbed area. A dump truck or loader pours sand into the hopper. The first drive motor drives the first auger to rotate, which transports the sand from the hopper to the conveying cylinders. Under the conveying force of the first auger and gravity, the sand gradually moves downwards along the conveying cylinders and falls from the long, narrow discharge port onto the roadbed area, thus laying a sand layer on the roadbed. Simultaneously, the traveling mechanism moves along the length of the roadbed area to evenly cover it with sand, thereby avoiding direct mechanical construction on the roadbed area and reducing damage to the sand layer.

[0009] Furthermore, by setting the shape of the discharge port, the amount of sand falling can be balanced, making the amount of sand falling along the length of the conveyor cylinder more even, thereby further improving the uniformity of the sand layer filling and making the sand layer more stable, so as to improve the bearing capacity of the roadbed.

[0010] Furthermore, by setting up a lifting mechanism, the height of the conveying cylinder can be adjusted to fill sand layers of different heights.

[0011] Secondly, because the conveying cylinder is set at an angle downwards, the sand moves faster under the combined action of gravity and the first auger. This increases the movement speed of the sand within the conveying cylinder and the discharge speed. At the same time, the projected area of ​​the inclined discharge port on the roadbed area is the area of ​​the laid sand, and the discharge area of ​​the discharge port is larger than the projected area. Therefore, the amount of sand laid per unit time is larger, which greatly improves the sand discharge efficiency and the amount of sand discharged, thereby comprehensively improving the filling efficiency of the sand layer.

[0012] Finally, by setting up detachable fixed connections, the overall structure can be disassembled and transported quickly and easily.

[0013] Optionally, a horizontal steel pipe is fixed between the two hoppers, and an arched steel pipe is fixed between the two conveying cylinders. The arched part of the arched steel pipe is fixedly connected to the middle part of the horizontal steel pipe through ribs.

[0014] By adopting the above technical solutions, the connection strength between the conveyor cylinder and the hopper can be greatly improved, as well as the anti-tilting ability of the traveling mechanism can be enhanced.

[0015] Optionally, the first auger includes a shaft and a spiral blade fixed to the outer peripheral surface of the shaft. The surface of the spiral blade is provided with a plurality of arc-shaped protrusions arranged at intervals along the spiral path. The curvature direction of the arc-shaped protrusions is towards the rotation direction of the shaft, and one end of the arc-shaped protrusions extends to the outer diameter of the spiral blade.

[0016] By adopting the above technical solution, the arc-shaped protrusion can increase the contact area with the sand, thereby improving the disturbance effect of the spiral blade on the sand. The force of the arc-shaped protrusion will force the sand on the spiral blade to be thrown out radially, thereby increasing the radial throwing speed of the sand, and thus increasing the discharge speed of the sand through the discharge port.

[0017] Optionally, the first auger includes a shaft and helical blades fixed to the outer peripheral surface of the shaft. The helical blades include multiple blade units, adjacent blade units are staggered along the circumference of the shaft, and two adjacent blade units partially overlap on the longitudinal section of the shaft. The gap between two adjacent blade units is set as a through gap.

[0018] By adopting the above technical solution, under the action of gravity, the sand in the conveying cylinder can move axially faster by passing through the gap, thereby improving the discharge efficiency. In addition, by setting the overlapping part of the blade unit, the blade unit can still maintain a strong conveying force during the rotation of the shaft, so as to reduce the occurrence of sand leakage from the gap and affecting the sand conveying.

[0019] Optionally, the first auger includes a shaft and helical blades fixed to the outer circumferential surface of the shaft. The helical blades include multiple blade units, with adjacent blade units offset along the circumferential and axial directions of the shaft. The gap between two adjacent blade units is set as a clearance gap. The conveying cylinder has a mounting hole on its wall opposite to the discharge port. A vibrating rod is inserted into the mounting hole and extends into the inner cavity of the conveying cylinder in the radial direction. A rubber ring is provided in the annular gap between the vibrating rod and the mounting hole. When the first auger rotates, the vibrating rod avoids the helical blades through the clearance gap.

[0020] By adopting the above technical solution, and by setting up a vibrating rod, the vibrating rod applies vibration force to the sand in the conveying cylinder to reduce the friction between the sand and improve the mobility of the sand in the conveying cylinder, thereby improving the discharge efficiency. The setting of the clearance gap can reduce the collision interference between the blade unit and the vibrating rod.

[0021] Furthermore, the vibrating rod is positioned directly opposite the discharge port, so the vibrating sand is more easily discharged directly downwards from the discharge port. That is, the more sand is discharged, the lower the sand density, and the more prominent the vibration liquefaction phenomenon becomes, thereby increasing the axial movement speed of the sand, which in turn increases the amount of sand entering the conveying cylinder from the hopper and the speed at which the sand is discharged.

[0022] Secondly, the rubber ring allows the vibrator to have a certain displacement space, thereby releasing the vibration force.

[0023] Finally, when the vibrator passes through the clearance gap, it can vibrate the sand in the clearance gap, thereby increasing its fluidity and accelerating the downward movement of the sand under gravity.

[0024] Optionally, the first auger includes a shaft and helical blades fixed to the outer circumferential surface of the shaft. The helical blades include multiple blade units, with adjacent blade units offset along the circumferential and axial directions of the shaft. The gap between two adjacent blade units is set as a clearance gap. The conveying cylinder has a rotating hole on its wall relative to the discharge port. A circular plate is rotatably connected to the rotating hole around its own axis. The circular plate is parallel to the axis of the conveying cylinder. The conveying cylinder is provided with a drive assembly for driving the circular plate to rotate. The circular plate has an eccentrically set mounting hole. A vibrating rod passes through the mounting hole. The vibrating rod is inclined relative to the axis of the circular plate and extends into the inner cavity of the conveying cylinder. A rubber ring is provided in the annular gap between the vibrating rod and the mounting hole. When both the first auger and the circular plate rotate, the vibrating rod avoids the helical blades through the clearance gap.

[0025] By adopting the above technical solution, when the first auger rotates to transport sand, the drive component drives the circular plate to rotate around its own axis, causing the vibrating rod to rotate around the axis of the circular plate. At the same time, the first auger also drives the sand to move. The combination of the two movements greatly increases the contact range between the vibrating rod and the sand, thereby improving the vibration transmission range and further improving the fluidity of the sand, making it easier for the sand to fall from both sides of the shaft to the discharge port.

[0026] Furthermore, the vibration range of the vibrating rod is truncated cone-shaped, with the truncated area located directly above the discharge port. The size of the truncated area is larger than that of the discharge port. Therefore, when the sand material at the bottom of the first auger falls out of the discharge port, the vibrating sand material in the truncated area can quickly move down and quickly fill the gap, thereby greatly accelerating the discharge volume and smoothness of the discharge port.

[0027] Finally, by limiting the rotation direction of the vibrating rod relative to the blade unit, the vibrating rod is located near the movement path of the blade unit, allowing the vibrating rod to pre-vibrate the sand that will be pushed by the blade unit. The blade unit can then push the vibrating sand to move quickly. Combined with the fact that the sand is subject to greater gravity due to the inclination of the conveyor cylinder, the sand is easily pushed by the blade unit, thus increasing the movement speed of the sand along the conveyor cylinder. This reduces the rotational load on the first auger and indirectly increases the quantity and efficiency of the discharged material.

[0028] Optionally, a mixing mechanism is also included, comprising a fixed tube, a second auger, a second drive motor, and a funnel. The shaft is a tubular structure with a first strip-shaped hole extending axially through its wall. The fixed tube passes through the inner cavity of the shaft, with one end fixedly connected to the connector and the other end fixedly connected to the funnel. The fixed tube has a second strip-shaped hole extending axially, facing the discharge port. The second auger passes through the fixed tube, with one end located at the bottom of the funnel. The second drive motor drives the second auger to rotate. The funnel is used to hold the solidified material, which includes polypropylene fiber, fly ash, loose fill, and limestone powder. The second auger conveys the solidified material downwards and evenly discharges it into the conveying cylinder through the second strip-shaped hole of the fixed tube and the first strip-shaped hole of the shaft.

[0029] By adopting the above technical solution, the solidified material is poured into the funnel, and the second auger is started to drive the solidified material in the funnel into the fixed pipe. Due to the rotation of the shaft, the first and second strip holes intermittently overlap and connect. Therefore, the solidified material will be discharged into the conveying cylinder intermittently through the second and first strip holes, making the solidified material more evenly mixed with the sand in the conveying cylinder. Furthermore, since the second strip hole faces downward, the solidified material will be discharged along with the sand under gravity, reducing the occurrence of sand backflow into the fixed pipe.

[0030] The combination of solidifying material and sand can greatly improve the stability of sand layer filling. 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 subgrade and playing a role in controlling deformation. Furthermore, fly ash, loose fill, and limestone powder can increase the cohesiveness of the sand, causing the sand particles to adhere to each other and undergo a "cementing" effect, thus improving the compaction.

[0031] Optionally, a filter screen is provided inside the first strip-shaped hole to prevent sand from entering the fixed pipe inside the conveying cylinder.

[0032] By adopting the above technical solution and setting up a filter screen, sand is prevented from entering the first strip hole, thereby reducing the occurrence of sand getting stuck in the fitting gap between the fixed pipe and the shaft.

[0033] Optionally, a water spraying mechanism is also included, which includes a water inlet pipe and two sets of fan-shaped nozzles that correspond one-to-one with the conveying cylinder. The fan-shaped nozzles are installed at the upper end of the conveying cylinder and connected to the water inlet pipe. Each set of fan-shaped nozzles includes two fan-shaped nozzles symmetrically arranged around the axis of the conveying cylinder. The fan-shaped nozzles are arranged downwards, and the spray angle of the fan-shaped nozzles is in the range of 0-80°. One of the spray boundary lines of the fan-shaped nozzles is set vertically downwards, and the other spray boundary line of the fan-shaped nozzles is set inclined towards the connector.

[0034] By adopting the above technical solution and setting up a water spraying mechanism to spray water on the sand flow during the material feeding process, the moisture content and moisture content uniformity can be improved, thereby improving the filling efficiency of the sand layer.

[0035] Furthermore, the two fan-shaped nozzles in the same group are located at the front and rear sides of the conveying cylinder, respectively. The fan-shaped nozzles located at the rear side can replenish water to the newly laid sand layer in a timely manner, while the fan-shaped nozzles located at the front side can replenish water to the upper surface of the previous sand layer, so as to facilitate the rapid adsorption and bonding of the subsequent sand layers, thereby comprehensively improving the water content uniformity and water replenishment effect of the sand layer.

[0036] Finally, by setting the spray range and spray position of the fan-shaped nozzles, combined with the tilt angle of the conveyor cylinder, a very small amount of water and a large coverage area can be achieved. In addition, a water curtain can be effectively formed to suppress the dust phenomenon of falling sand.

[0037] This application provides a construction method for a wind-blown sand roadbed filling construction device, which adopts the following technical solution:

[0038] A construction method for a wind-blown sand roadbed filling construction device includes the following steps:

[0039] S1. Measurement and layout;

[0040] S2. Subgrade treatment: Clear and compact the surface of the subgrade area and the walking areas on both sides of the subgrade area;

[0041] S3. Aeolian sand filling: The conveying cylinder is pre-installed on the hopper, and the traveling mechanism is positioned on the traveling area. At this time, both conveying cylinders are suspended directly above the roadbed area. Sand is poured into the hopper, and the first drive motor drives the first auger to rotate. The first auger transports the sand in the hopper to the conveying cylinder. Under the action of the conveying force and gravity of the first auger, the sand gradually moves downward along the conveying cylinder and 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 of the roadbed area to evenly cover the roadbed area with the sand layer.

[0042] S4. Watering the sand layer: Water the sand layer to increase its moisture content;

[0043] S5. Sand layer compaction: The sand layer is subjected to stabilizing compaction and static compaction in sequence;

[0044] S6. Sand layer sealing: Lay a layer of stone chips on the sand layer and compact it.

[0045] By adopting the above technical solution, the use of suspended conveyor cylinders for the laying of aeolian sand can not only avoid damage to the already formed roadbed sand layer, but also improve the laying efficiency and uniformity. It can also eliminate the need for the subsequent sand layer leveling step, greatly shortening the construction cycle.

[0046] In summary, this application includes at least one of the following beneficial technical effects:

[0047] 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, the inclined setting of the conveying cylinder increases the moving speed of the sand in the conveying cylinder and the sand discharge speed. At the same time, the projected area of ​​the inclined discharge port on the roadbed area is the area of ​​the sand laid. Therefore, the amount of sand laid per unit time is large, that is, the sand discharge efficiency and sand discharge volume are greatly improved, thereby comprehensively improving the filling efficiency of the sand layer.

[0048] 2. By setting up a vibrating rod, a vibration force is applied to the sand in the conveying cylinder to reduce the friction between the sand and improve the mobility of the sand in the conveying cylinder, thereby improving the discharge efficiency. With the cooperation of the vibrating rod and the discharge port, the vibrating sand is more likely to be discharged directly downward from the discharge port, which reduces the density of the sand and makes the vibration phenomenon more prominent, thereby increasing the axial movement speed of the sand, thus increasing the amount of sand entering the conveying cylinder from the hopper and the speed of sand discharge.

[0049] 3. By setting up a mixing mechanism, the first and second strip holes intermittently overlap and connect through the cooperation of the fixed pipe and the shaft, and through the rotation of the shaft. Therefore, the solidified material will be intermittently discharged through the second and first strip holes to the center of the conveying cylinder, so that the solidified material and the sand in the conveying cylinder are more evenly mixed, thereby utilizing the stability of the sand layer filling.

[0050] 4. By setting up a water spraying mechanism, a small amount of water and the tilt angle of the conveying cylinder can be used to set up water curtains on the front and back sides. This not only suppresses dust, but also replenishes the newly laid sand layer and the previous sand layer with water in a timely manner, so that the subsequent sand layers can be quickly absorbed and combined, thereby comprehensively improving the water content uniformity and water replenishment effect of the sand layer. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0052] Figure 2 This is a partial cross-sectional view of the conveyor cylinder of Example 1.

[0053] Figure 3 This is a cross-sectional view of the conveyor cylinder of Example 1.

[0054] Figure 4 This is a schematic cross-sectional view of the conveyor cylinder in Example 1.

[0055] Figure 5 This is a schematic diagram of Embodiment 2 illustrating the positional relationship of multiple blade units.

[0056] Figure 6 This is a schematic diagram of the longitudinal section of the conveyor cylinder in Example 3.

[0057] Figure 7 This is a schematic diagram of the conveyor cylinder in Example 4.

[0058] Figure 8 This is a partial cross-sectional view of Embodiment 4, used to illustrate the internal structure of the conveying cylinder.

[0059] Figure 9 This is a cross-sectional view of the mixing mechanism in Example 5.

[0060] Figure 10 yes Figure 9 A magnified view of a portion of point A in the middle.

[0061] Figure 11 This is a schematic cross-sectional view of the fixed tube in Example 5.

[0062] Figure 12 This is a schematic diagram of the overall structure of Example 6.

[0063] Explanation of reference numerals in the attached drawings: 1. Traveling mechanism; 2. Conveying cylinder; 3. Reinforcing component; 5. Fixed pipe; 6. Second auger; 7. Funnel; 8. Fan-shaped nozzle; 11. Lifting mechanism; 12. Hopper; 13. Connecting component; 14. First drive motor; 21. Step groove; 211. Boss; 212. Rotating hole; 22. First auger; 221. Shaft; 2211. First strip hole; 222. Spiral blade; 2221. Blade unit; 2222. Through gap; 2223. Clearance; 223. Arc-shaped protrusion; 23. Discharge port; 24. Mounting hole; 25. Rubber ring; 26. Vibrator; 27. Circular plate; 28. Third drive motor; 281. Worm gear; 282. Worm; 31. Horizontal steel pipe; 32. Arched steel pipe; 33. Rib plate; 34. First connecting seat; 35. First pin; 36. Second connecting seat; 37. Second pin; 51. Second strip hole; 61. Second drive motor; 81. Water inlet pipe. Detailed Implementation

[0064] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0065] Embodiment 1 of this application discloses a construction device for filling aeolian sand roadbed.

[0066] Reference Figure 1 and Figure 2 The aeolian sand roadbed filling construction device includes two traveling mechanisms 1, two conveying cylinders 2, and two first screw conveyors 22. The two traveling mechanisms 1 are located on both sides of the roadbed area. The traveling mechanisms 1 can be tracked or wheeled. The traveling mechanisms 1 are equipped with lifting mechanisms 11, which can be hydraulic cylinders or scissor lifting structures. A hopper 12 is fixed on the lifting mechanism 11.

[0067] The two conveying cylinders 2 are inclined downwards at their adjacent ends, with an angle of 30-45° between the conveying cylinders 2 and the horizontal plane. The upper end of the conveying cylinder 2 is detachably and fixedly connected to the bottom of the adjacent hopper 12, so that the upper end of the conveying cylinder 2 and the bottom of the hopper 12 are connected. The detachable fixing method can be flange fixing. The lower ends of the two conveying cylinders 2 are detachably and fixedly connected by a connector 13. Specifically, the lower end of the conveying cylinder 2 is provided with a stepped groove 21, and the connector 13 is a vertically arranged semi-circular plate 27. The connector 13 is adapted to the stepped groove 21 on both sides, and the connector 13 is fixed to the end of the adjacent conveying cylinder 2 by a flange connection.

[0068] To further improve the positional stability of the conveyor cylinder 2, the following configuration is also made: a reinforcing component 3 is provided between the hoppers 12. The reinforcing component 3 includes a horizontal steel pipe 31 and an arched steel pipe 32. The horizontal steel pipe 31 is located directly above the arched steel pipe 32. The middle part of the arched steel pipe 32 arches upward, and the middle part of the arched steel pipe 32 is welded and fixedly connected to the horizontal steel pipe 31 through a rib plate 33.

[0069] A first connecting seat 34 is fixed to the outer wall of the hopper 12. The two ends of the horizontal steel pipe 31 extend into the first connecting seats 34 of the two hoppers 12 respectively, and the end of the horizontal steel pipe 31 and the first connecting seat 34 are provided with a first pin 35 to achieve a detachable fixed connection. A second connecting seat 36 is fixed to the outer top wall of the conveying cylinder 2. The two ends of the arched steel pipe 32 extend into the second connecting seats 36 of the two conveying cylinders 2 respectively, and the end of the arched steel pipe 32 and the second connecting seat 36 are provided with a second pin 37 to achieve a detachable fixed connection.

[0070] like Figure 3As shown, the first auger 22 is coaxially arranged inside the conveying cylinder 2. The first auger 22 includes a shaft 221 and spiral blades 222 fixed to the outer circumference of the shaft 221. One end of the shaft 221 is rotatably connected to the connector 13, and the other end of the shaft 221 is rotatably connected to the bottom of the hopper 12. A first drive motor 14 is installed on the hopper 12. The first drive motor 14 can directly drive the shaft 221 to rotate. The first drive motor 14 can also drive the shaft 221 to rotate through a reduction gearbox, thereby conveying the sand in the hopper 12 to the conveying cylinder 2 and moving the sand along the axial direction of the conveying cylinder 2.

[0071] like Figure 2 , Figure 3 As shown, the conveying cylinder 2 has a long strip-shaped discharge port 23, which extends along the axial direction of the conveying cylinder 2. Therefore, during the axial movement of sand in the conveying cylinder 2, the sand gradually falls from the long strip-shaped discharge port 23 into the roadbed area, thereby laying a sand layer in the roadbed area. Furthermore, the opening width of the discharge port 23 gradually increases from the upper end to the lower end of the conveying cylinder 2, thereby making the amount of sand falling more uniform and improving the uniformity of sand layer filling.

[0072] To facilitate the discharge of sand from discharge port 23, the following settings can also be implemented, such as... Figure 4 As shown, the surface of the spiral blade 222 is provided with a plurality of arc-shaped protrusions 223 arranged at intervals along the spiral path. The curvature direction of the arc-shaped protrusions 223 is towards the rotation direction of the shaft 221, and one end of the arc-shaped protrusions 223 extends to the outer diameter of the spiral blade 222. When the spiral blade 222 drives the sand to move axially, the force exerted by the arc-shaped protrusions 223 on the sand will force the sand on the spiral blade 222 to be thrown out radially, thereby increasing the radial throwing speed of the sand and thus increasing the discharge speed of the sand through the discharge port 23.

[0073] Example 1 also discloses a construction method for an aeolian sand roadbed filling construction device, including the following steps:

[0074] S1. Measurement and layout.

[0075] 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.

[0076] S3. Aeolian Sand Filling: Reinforcement component 3 and conveyor cylinder 2 are pre-installed. The traveling mechanism 1 is positioned on the traveling area. At this time, the conveyor cylinder 2 is suspended directly above the roadbed area. Then, a dump truck or loader is used to pour sand into the hopper 12. The first drive motor 14 drives the first auger 22 to rotate. The first auger 22 conveys the sand in the hopper 12 to the conveyor cylinder 2. Under the action of the conveying force and gravity of the first auger 22 (the inclined setting of the conveyor cylinder 2 and the gravity will give the sand a force to move along the axial direction of the conveyor cylinder 2), the sand moves along... The conveying cylinder 2 moves rapidly downward axially, and the discharge speed of the hopper 12 is even faster. As the sand moves downward axially, it gradually falls from the elongated discharge port 23 into the roadbed area, thus laying a sand layer on the roadbed area. At the same time, the traveling mechanism 1 moves along the length of the roadbed area to evenly cover the roadbed area with the sand layer. It should be noted that when filling sand layers of different heights, the lifting mechanism 11 needs to be used in advance to adjust the height of the conveying cylinder 2 and the hopper 12 so that a certain vertical distance is maintained between the conveying cylinder 2 and the sand layer.

[0077] After the sand layer is filled, the uniformity of the sand layer thickness is judged. The standard is that the deviation between the highest and lowest parts of the sand layer should not exceed 8cm. If the thickness deviation is large, the sand layer needs to be leveled; if the thickness is relatively uniform, the sand layer does not need to be leveled and can proceed directly to the next step.

[0078] S4. Sprinkling water on the sand layer: Sprinkle water on the sand layer to increase its moisture content. Since the sand layer loses moisture quickly due to strong winds and sunlight during the day, the sand layer should be sealed at night.

[0079] S5. 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.

[0080] S6. Sand layer sealing: Lay a layer of stone chips on the sand layer and compact it.

[0081] The implementation principle of Example 1 is as follows: using the conveying cylinder 2 suspended in the roadbed area, the sand material is evenly spread from the hopper 12 onto the roadbed area, thereby reducing mechanical damage to the sand layer.

[0082] Furthermore, by utilizing the downward tilt of the conveying cylinder 2, the sand is subjected not only to the force from the first auger 22 but also to the component of gravity, allowing the sand to move axially within the conveying cylinder 2 more quickly. This greatly increases the amount of sand supplied from the hopper 12 to the conveying cylinder 2, thus significantly increasing the amount of sand discharged and thereby greatly improving the filling efficiency. Moreover, the rotational load on the first drive motor 14 is also greatly reduced, thereby reducing motor damage.

[0083] Finally, since the projected area of ​​the inclined discharge port 23 on the roadbed area is the area of ​​the laid sand, and the discharge area of ​​the discharge port 23 is larger than the projected area, the amount of sand laid per unit time is larger. That is, the sand discharge efficiency and the amount of sand discharged are greatly improved, which in turn greatly improves the filling efficiency of the sand layer.

[0084] Example 2

[0085] The difference between Example 2 and Example 1 is that, as Figure 5 As shown, the helical blade 222 includes multiple blade units 2221. Adjacent blade units 2221 are staggered along the circumference of the shaft 221, and the projections of two adjacent blade units 2221 on the longitudinal section of the shaft 221 overlap. The gap between two adjacent blade units 2221 is set as a through gap 2222.

[0086] By setting the passage gap 2222, under the action of gravity and the first auger 22, and with the sand continuously being discharged from the discharge port 23 during the sand movement, resulting in high sand flow in the conveying cylinder 2, the sand in the conveying cylinder 2 can accelerate its axial flow through the passage gap 2222, that is, further increase the axial movement speed of the sand. The faster the axial movement speed of the sand, the faster the discharge speed of the hopper 12, and the faster the sand is discharged from the discharge port 23, thereby greatly improving the efficiency of sand layer filling.

[0087] Example 3

[0088] The difference between Example 3 and Example 2 is that, as Figure 6 As shown, adjacent blade units 2221 are offset along the circumference and axial direction of the shaft 221, and the gap between two adjacent blade units 2221 is set as the clearance gap 2223.

[0089] A mounting hole 24 is provided through the wall of the conveying cylinder 2 relative to the discharge port 23. A vibrating rod 26 is inserted into the mounting hole 24. The vibrating rod 26 extends into the inner cavity of the conveying cylinder 2 in the radial direction. The position of the vibrating rod 26 is directly opposite the clearance gap 2223, that is, the blade unit 2221 will not collide with the vibrating rod 26 when it rotates.

[0090] Furthermore, a rubber ring 25 is provided in the annular gap between the vibrating rod 26 and the mounting hole 24. The rubber ring 25 mainly serves to seal the annular gap, while also allowing the vibrating rod 26 to have a certain vibration displacement.

[0091] During the axial movement of sand within the conveying cylinder 2, the vibrating rod 26 applies vibration force to the sand to reduce friction between sand particles, thereby improving the mobility of sand within the conveying cylinder 2 and increasing discharge efficiency. Secondly, the vibrating rod 26 is positioned directly opposite the discharge port 23, so the vibrating sand is more easily discharged directly downwards from the discharge port 23. In other words, the greater the amount of sand discharged, the higher the axial movement speed and filling efficiency of the sand are indirectly increased.

[0092] Example 4

[0093] The difference between Example 4 and Example 3 is that, as Figure 7 As shown, a boss 211 is fixed on the wall of the conveying cylinder 2 relative to the discharge port 23. A rotating hole 212 is provided in the boss 211. The axis of the rotating hole 212 is arranged radially along the conveying cylinder 2. A circular plate 27 is rotatably connected in the rotating hole 212 around its own axis. The conveying cylinder 2 is provided with a drive assembly for driving the circular plate 27 to rotate.

[0094] The drive assembly includes a third drive motor 28, a worm gear 281, and a worm 282. The worm gear 281 is a ring-shaped structure that is sleeved and fixed on the outer circumferential surface of the circular plate 27. The third drive motor 28 is fixed to the outer circumferential wall of the conveying cylinder 2. The worm 282 is fixedly connected to the output shaft of the third drive motor 28 and is parallel to the axis of the conveying cylinder 2. The worm 282 meshes with multiple worm gears 281 at the same time, that is, the multiple circular plates 27 are driven to rotate by the drive of the third drive motor 28.

[0095] like Figure 8 As shown, the circular plate 27 is provided with an eccentrically set mounting hole 24, and a vibrating rod 26 is inserted through the mounting hole 24. The vibrating rod 26 is inclined relative to the axis of the circular plate 27 and extends into the inner cavity of the conveying cylinder 2. A rubber ring 25 is provided in the annular gap between the vibrating rod and the mounting hole 24.

[0096] When the first auger 22 rotates to transport sand, the drive assembly drives the circular plate 27 to rotate around its own axis, causing the vibrating rod 26 to rotate around the axis of the circular plate 27. (During the rotational movement of the vibrating rod 26 relative to the first auger 22, the vibrating rod 26 will pass through the clearance 2223 to avoid the spiral blades 222, thereby reducing the occurrence of collision interference.) The rotation direction of the vibrating rod 26 and the rotation direction of the first auger 22 are shown below. Figure 8 The combination of the two movements greatly increases the contact range between the vibrating rod 26 and the sand, thereby improving the vibration transmission range and further enhancing the fluidity of the sand. This makes it easier for the sand to fall from both sides of the shaft 221 to the discharge port 23, thus greatly accelerating the discharge volume and smoothness of the discharge port 23.

[0097] Secondly, since the rotation path of the vibrating rod 26 partially overlaps with the rotation path of the blade unit 2221, that is, the vibrating rod 26 is located near the movement path of the blade unit 2221, the vibrating rod 26 can pre-vibrate the sand that will be pushed by the blade unit 2221, and the blade unit 2221 can push the vibrating sand to move quickly. In addition, combined with the fact that the sand is subjected to a large gravity factor due to the inclination of the conveying cylinder 2, the sand is easily pushed by the blade unit 2221, that is, the moving speed of the sand along the conveying cylinder 2 is increased, thereby reducing the rotational load of the first auger 22 and indirectly increasing the quantity and efficiency of discharge.

[0098] Example 5

[0099] The difference between Example 5 and Example 1 is that, as Figure 9 , Figure 10 As shown, a construction device for filling a wind-blown sand roadbed also includes a mixing mechanism, which includes a fixed pipe 5, a second auger 6, a second drive motor 61, and a funnel 7, wherein the funnel 7 is positioned on one side of the hopper 12, and the second drive motor 61 is mounted on the funnel 7.

[0100] The shaft 221 is a tubular structure. The first drive motor 14 drives the shaft 221 to rotate by gear transmission. The fixed tube 5 passes through the inner cavity of the shaft 221. One end of the fixed tube 5 is fixedly connected to the connector 13. The other end of the fixed tube 5 passes through the hopper 12 and is fixedly connected to the funnel 7. The second auger 6 passes through the fixed tube 5. One end of the second auger 6 is rotatably connected to the connector 13. The other end of the second auger 6 passes through the hopper 12 and is located at the bottom of the funnel 7. The second drive motor 61 is used to drive the second auger 6 to rotate.

[0101] Funnel 7 is used to put in the solidification material, which includes polypropylene fiber, fly ash, loose fill and limestone powder.

[0102] like Figure 11 As shown, the tube wall of the shaft 221 has a first strip hole 2211 extending along its own axial direction, and the fixed tube 5 has a second strip hole 51 extending along its own axial direction. The second strip hole 51 is set towards the discharge port 23, that is, the shaft 221 can rotate relative to the fixed tube 5 under the drive of the first drive motor 14, so that the first strip hole 2211 and the second strip hole 51 are intermittently connected.

[0103] When filling the sand layer, the solidified material is poured into the funnel 7 in advance. The second auger 6 and the first auger 22 are started at the same time. The second auger 6 drives the solidified material in the funnel 7 into the fixed pipe 5. Due to the rotation of the shaft 221, the first strip hole 2211 and the second strip hole 51 intermittently overlap and connect. Therefore, the solidified material will intermittently pass through the second strip hole 51 and the first strip hole 2211 to the center of the conveying cylinder 2, so that the solidified material and the sand in the conveying cylinder 2 are more evenly mixed.

[0104] 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 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. In addition, fly ash, loose fill and limestone powder can improve the cohesiveness of the sand, so that the sand particles can bond together and produce a "cementing" effect to improve the compaction.

[0105] Furthermore, in order to reduce the occurrence of sand getting stuck on the outer circumference of the fixed tube 5, in other embodiments, the following configuration can be made: a strip-shaped filter screen is fixed in the first strip-shaped hole 2211. The mesh size of the filter screen is larger than the size of the solidified material and smaller than the size of the sand. That is, the filter screen only allows the solidified material to be discharged, but does not allow sand to enter.

[0106] Example 6

[0107] The difference between Example 6 and Example 1 is that, as Figure 12 As shown, a construction device for filling aeolian sand roadbed also includes a water spraying mechanism. The water spraying mechanism can increase the moisture content and moisture uniformity, thereby improving the filling efficiency of the sand layer.

[0108] Specifically, the water spraying mechanism includes a water inlet pipe 81 and two sets of fan-shaped nozzles 8 that correspond one-to-one with the two conveying cylinders 2. The fan-shaped nozzles 8 are installed at the upper end of the conveying cylinders 2 and are connected to the water inlet pipe 81. Each set of fan-shaped nozzles 8 includes two fan-shaped nozzles 8 that are symmetrically arranged around the axis of the conveying cylinders 2. That is, the two fan-shaped nozzles 8 in the same set are located on the front and rear sides of the conveying cylinders 2 in the forward direction, respectively.

[0109] The fan-shaped nozzle 8 is set downwards, and the spray angle range of the fan-shaped nozzle 8 can be 0-80°. One of the spray boundary lines of the fan-shaped nozzle 8 is set vertically downwards, and the other spray boundary line of the fan-shaped nozzle 8 is inclined towards the connector 13.

[0110] First, by setting the spray range and spray position of the fan-shaped nozzle 8, and combining it with the tilt angle of the conveying cylinder 2, a very small amount of water and a large coverage area are achieved. This allows the water mist sprayed by the fan-shaped nozzle 8 located on the front and rear sides of the conveying cylinder 2 to form two water curtains, while the falling sand is located between the two water curtains, thus effectively suppressing the dust phenomenon of the falling sand.

[0111] Secondly, the fan-shaped nozzles 8 located at the rear can replenish water to the newly laid sand layer in a timely manner, while the fan-shaped nozzles 8 located at the front can replenish water to the upper surface of the previous sand layer, so as to facilitate the rapid adsorption and bonding of the subsequent sand layers, thereby comprehensively improving the water content uniformity and water replenishment effect of the sand layer.

[0112] 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. A construction device for filling aeolian sand roadbed, characterized in that: It includes two traveling mechanisms (1), two conveying cylinders (2), and two first augers (22). The two traveling mechanisms (1) are located on both sides of the roadbed area. The traveling mechanism (1) is equipped with a lifting mechanism (11), and the lifting mechanism (11) is equipped with a hopper (12). The two conveying cylinders (2) are inclined downward at their adjacent ends. The angle between the conveying cylinder (2) and the horizontal plane is 30-45°. The upper end of the conveying cylinder (2) is detachably and fixedly connected to the bottom of the adjacent hopper (12). The lower end of the conveying cylinder (2) is detachably fixedly connected by a connector (13). The conveying cylinder (2) has a long strip-shaped discharge port (23), which extends axially along the conveying cylinder (2). The opening width of the discharge port (23) gradually increases from the upper end to the lower end of the conveying cylinder (2). The first auger (22) is located inside the conveying cylinder (2). One end of each of the two first augers (22) extends into the bottom of the two hoppers (12). The hoppers (12) are equipped with a design for... A first drive motor (14) drives the first auger (22) to rotate; the first auger (22) includes a shaft (221) and helical blades (222) fixed to the outer circumferential surface of the shaft (221). The helical blades (222) include multiple blade units (2221). Adjacent blade units (2221) are staggered along the circumference and axial direction of the shaft (221), and the gap between two adjacent blade units (2221) is set as a clearance gap (2223); the conveying cylinder (2 The cylinder wall of the first auger (22) is provided with an installation hole (24) relative to the discharge port (23). A vibrating rod (26) is inserted into the installation hole (24). The vibrating rod (26) extends into the inner cavity of the conveying cylinder (2) in the radial direction. A rubber ring (25) is provided in the annular gap between the vibrating rod (26) and the installation hole (24). When the first auger (22) rotates, the vibrating rod (26) avoids the spiral blade (222) through the clearance gap (2223).

2. The aeolian sand roadbed filling construction device according to claim 1, characterized in that: A horizontal steel pipe (31) is fixed between the two hoppers (12), and an arched steel pipe (32) is fixed together between the two conveying cylinders (2). The arched part of the arched steel pipe (32) is fixedly connected to the middle part of the horizontal steel pipe (31) through a rib plate (33).

3. The aeolian sand roadbed filling construction device according to claim 1, characterized in that: It also includes a mixing mechanism, which includes a fixed tube (5), a second auger (6), a second drive motor (61), and a funnel (7). The shaft (221) is a tubular structure, and the tube wall of the shaft (221) has a first strip-shaped hole (2211) extending along its own axial direction. The fixed tube (5) passes through the inner cavity of the shaft (221). One end of the fixed tube (5) is fixedly connected to the connector (13), and the other end of the fixed tube (5) is fixedly connected to the funnel (7). The fixed tube (5) has a second strip-shaped hole (51) extending along its own axial direction. The shaped hole (51) is set facing the discharge port (23). The second auger (6) is inserted into the fixed pipe (5). One end of the second auger (6) is located at the bottom of the funnel (7). The second drive motor (61) is used to drive the second auger (6) to rotate. The funnel (7) is used to put in the solidified material, which includes polypropylene fiber, fly ash, loose fill and limestone powder. The second auger (6) is used to convey the solidified material downward and evenly discharge it into the conveying cylinder (2) through the second shaped hole (51) of the fixed pipe (5) and the first shaped hole (2211) of the shaft (221).

4. The aeolian sand roadbed filling construction device according to claim 3, characterized in that: A filter screen is provided inside the first strip hole (2211) to prevent sand in the conveying cylinder (2) from entering the fixed pipe (5).

5. The aeolian sand roadbed filling construction device according to claim 1 or 2, characterized in that: It also includes a water spraying mechanism, which includes a water inlet pipe (81) and two sets of fan-shaped nozzles (8) that correspond one-to-one with the conveying cylinder (2). The fan-shaped nozzles (8) are installed at the upper end of the conveying cylinder (2) and are connected to the water inlet pipe (81). Each set of fan-shaped nozzles (8) includes two fan-shaped nozzles (8) symmetrically arranged around the axis of the conveying cylinder (2). The fan-shaped nozzles (8) are arranged downwards, and the spray angle of the fan-shaped nozzles (8) is in the range of 0-80°. One of the spray boundary lines of the fan-shaped nozzles (8) is set vertically downwards, and the other spray boundary line of the fan-shaped nozzles (8) is set inclined towards the connector (13).

6. A construction method for the aeolian sand roadbed filling construction device according to claim 1, 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 conveying cylinder (2) is pre-installed on the hopper (12), and the walking mechanism (1) is located on the walking area. At this time, both conveying cylinders (2) are suspended directly above the roadbed area. Sand is poured into the hopper (12), and the first drive motor (14) drives the first auger (22) to rotate. The first auger (22) conveys the sand in the hopper (12) to the conveying cylinder (2). Under the action of the conveying force and gravity of the first auger (22), the sand gradually moves downward along the conveying cylinder (2). The sand gradually falls from the long strip discharge port (23) to the roadbed area, thereby laying a sand layer on the roadbed area. At the same time, the walking mechanism (1) moves along the length of the roadbed area to evenly cover the roadbed area with the sand layer. S4. Watering the sand layer: Water the sand layer to increase its moisture content; S5. Sand layer compaction: The sand layer is subjected to stabilizing compaction and static compaction in sequence; S6. Sand layer sealing: Lay a layer of stone chips on the sand layer and compact it.

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