A lime-soil improved roadbed structure

Abstract

The application relates to a lime soil improved roadbed structure and belongs to the technical field of roadbed structures, which comprises a lime stabilized soil base layer, the lime stabilized soil base layer is located between an asphalt layer and a gravel cushion layer, a plurality of water seepage pipes are arranged in the lime stabilized soil base layer, a plurality of capillary holes are formed in the peripheral wall of the water seepage pipes, accumulated water in the lime stabilized soil base layer is seeped into the water seepage pipes through the capillary holes, the two ends of the water seepage pipes are located outside the lime stabilized soil base layer and are open, and the seeped water in the water seepage pipes is discharged through the ends; the two ends of the water seepage pipes are inclined towards the direction of the gravel cushion layer, the two ends of the water seepage pipes are provided with blocking pieces, and the blocking pieces are used for closing the ports of the water seepage pipes. The application has the effect of improving the stability of the lime stabilized soil base layer.

Description

Technical Field

[0001] This application relates to the field of roadbed structure technology, and in particular to a lime-soil improved roadbed structure. Background Technology

[0002] Lime-stabilized soil base course is a commonly used roadbed material with advantages such as good stability and strong crack resistance. Lime-stabilized soil is a type of soil developed from limestone parent material in subtropical southern regions. It generally has a relatively heavy and sticky texture, and its cross-section often shows some degree of lime foam reaction. It commonly comes in colors such as red, yellow, brown, and black. Lime-stabilized soil is frequently used as the base course in construction, serving as the most basic subbase layer in road pavement construction.

[0003] Lime-stabilized soil base courses offer several advantages: First, they improve pavement load-bearing capacity: Lime-paved pavements harden uniformly, increasing their load-bearing capacity and preventing subsidence under heavy loads. Second, they reduce potholes: Hardened lime paving fills cracks and potholes, ensuring a smooth surface and improving driving comfort. Third, they enhance pavement stability: Hardened lime paving not only strengthens the pavement structure but also improves its durability and water resistance.

[0004] However, when it rains, rainwater seeps into the lime-stabilized soil base course through the road surface. The lime-stabilized soil base course is also relatively compacted, making it difficult for rainwater to drain and evaporate, which in turn leads to a decrease in the stability of the lime-stabilized soil base course. Summary of the Invention

[0005] To improve the stability of lime-stabilized soil base courses, this application provides a lime-soil modified roadbed structure.

[0006] The lime-soil improved roadbed structure provided in this application adopts the following technical solution: A lime-soil improved roadbed structure includes a lime-stabilized soil base course, located between an asphalt layer and a crushed stone subbase. Multiple drainage pipes are installed within the lime-stabilized soil base course, each with multiple capillary pores on its periphery. Water accumulated within the lime-stabilized soil base course permeates into the drainage pipes through these capillary pores. Both ends of the drainage pipes are located outside the lime-stabilized soil base course and are open, allowing the permeated water to drain through the ends. Both ends of the drainage pipes are inclined towards the crushed stone subbase, and each end of the drainage pipe is equipped with a sealing element for sealing the ports of the drainage pipes.

[0007] Optionally, the subgrade structure also includes a connecting pipe for connecting to the seepage pipe, with the connecting end of the connecting pipe and the seepage pipe close to the port of the seepage pipe. The connecting pipe is used to introduce air to drive the air flow inside the seepage pipe and dry the interior of the lime-stabilized soil base.

[0008] Optionally, a cleaning disc is provided inside the seepage pipe. The inner diameter of the cleaning disc is smaller than the inner diameter of the seepage pipe. The cleaning disc is slidably disposed inside the seepage pipe and slides along the length of the seepage pipe. The device also includes a driving component for moving the cleaning disc along the seepage pipe to remove soil from inside the seepage pipe.

[0009] Optionally, the driving component includes connecting ropes disposed on both sides of the cleaning disc, with the connecting end of the connecting rope to the cleaning disc located at the center of the cleaning disc, the free end of the connecting rope located outside the permeation pipe and wound onto the permeation pipe, and the initial state of the cleaning disc being laid inside the permeation pipe.

[0010] Optionally, a baffle is rotatably provided at the connection between the connecting pipe and the seepage pipe. The rotation axis of the baffle is perpendicular to the axis of the connecting pipe and the seepage pipe. The baffle closes the connecting pipe, and the diameter of the baffle is smaller than the diameter of the seepage pipe. The initial position of the baffle is vertical and perpendicular to the axis of the seepage pipe. A stop block is provided inside the connecting pipe to prevent the baffle from being in a closed state.

[0011] Optionally, the sealing member includes a plug head slidably disposed at the end of the seepage pipe, the plug head sliding along the axial direction of the seepage pipe, the plug head being conical and inserted into the seepage pipe, and the sealing member further includes a driving member for driving the plug head to slide.

[0012] Optionally, a pressure relief plate is provided at the part of the seepage pipe located within the lime-stabilized soil base. The pressure relief plate is in the shape of a herringbone, and the seepage pipe is located below the pressure relief plate, with lime-soil filling the space between the seepage pipe and the pressure relief plate.

[0013] Optionally, a groove is provided on the top surface of the lime-stabilized soil base course. The groove is opened along the width direction of the lime-stabilized soil base course and is located directly above the drainage pipe. The groove is filled with an asphalt layer and is used to distribute the load to both sides of the groove.

[0014] Optionally, the groove has an arc-shaped surface at its edge facing the axial direction.

[0015] Optionally, the permeation pipes are arranged in multiple layers along the thickness direction of the lime-stabilized soil base course, and all are located directly below the groove.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. During the construction of the lime-stabilized soil base course, drainage pipes are buried within the lime-stabilized soil base course. When rainwater infiltrates into the lime-stabilized soil base course, the rainwater gradually seeps into the drainage pipes and enters the drainage pipes through capillary action, then exits from the ends of the drainage pipes. This accelerates the drainage efficiency of rainwater, reduces the possibility of damage to the lime-stabilized soil base course due to rainwater, and improves the stability of the lime-stabilized soil base course. Both ends of the drainage pipes are inclined towards the crushed stone cushion layer to facilitate the rapid drainage of rainwater within the drainage pipes. 2. After the lime-stabilized soil base course is constructed, it requires a relatively long curing period. During the curing process, water needs to be sprayed on the surface of the lime-stabilized soil base course. The curing water gradually seeps into the lime-stabilized soil base course. When the curing water in the lime-stabilized soil base course evaporates rapidly, the lime-stabilized soil base course will shrink and cracks will appear. Therefore, during the curing period, the seepage pipes are sealed with sealing devices, and then curing water is injected into the seepage pipes. The curing water in the seepage pipes seeps into the lime-stabilized soil base course through capillary tubes to replenish the curing water, thereby reducing the possibility of shrinkage of the lime-stabilized soil base course and reducing the possibility of cracks appearing in the asphalt layer. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a lime-soil improved roadbed structure according to an embodiment of this application; Figure 2 This is an exploded schematic diagram of an asphalt layer and a lime-stabilized soil base course in a lime-soil improved roadbed structure according to an embodiment of this application; Figure 3 This is a cross-sectional view of a lime-stabilized soil base course in a lime-soil improved roadbed structure according to an embodiment of this application; Figure 4 This is a cross-sectional view of a permeable pipe in a lime-soil improved roadbed structure according to an embodiment of this application; Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle; Figure 6 yes Figure 4 Enlarged diagram of part B.

[0018] Explanation of reference numerals in the attached drawings: 1. Lime-stabilized soil base course; 2. Asphalt layer; 3. Crushed stone cushion layer; 4. Drainage pipe; 5. Capillary pore; 6. Connecting pipe; 7. Vertical pipe; 8. Cleaning disc; 9. Connecting rope; 10. Baffle; 11. Stop block; 12. Plug head; 13. Groove; 14. Arc-shaped surface. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0020] This application discloses a lime-soil improved roadbed structure. (Refer to...) Figure 1 , Figure 2 and Figure 3 The lime-soil improved roadbed structure includes a lime-stabilized soil base course 1, which is located between an asphalt layer 2 and a crushed stone cushion layer 3. Multiple drainage pipes 4 are installed within the lime-stabilized soil base course 1. These drainage pipes 4 are evenly and intermittently arranged along the length of the lime-stabilized soil base course 1. Multiple capillary pores 5 are formed on the periphery of each drainage pipe 4, evenly distributed along both the axial and length directions of the drainage pipe 4. Water accumulated within the lime-stabilized soil base course 1 permeates into the drainage pipes 4 through the capillary pores 5. Both ends of the drainage pipes 4 are located outside the lime-stabilized soil base course 1 and are open. The permeated water within the drainage pipes 4 is discharged through the ends. Both ends of the drainage pipes 4 are inclined towards the crushed stone cushion layer 3. Sealing elements are installed at both ends of the drainage pipes 4 to seal the ports of the drainage pipes 4.

[0021] During the construction of the lime-stabilized soil base 1, a drainage pipe 4 is buried within the lime-stabilized soil base 1. When rainwater infiltrates into the lime-stabilized soil base 1, the rainwater gradually seeps into the drainage pipe 4 and enters the drainage pipe 4 through capillary action, then exits from the end of the drainage pipe 4. This accelerates the drainage efficiency of rainwater, reduces the possibility of damage to the lime-stabilized soil base 1 due to rainwater, and improves the stability of the lime-stabilized soil base 1. Both ends of the drainage pipe 4 are inclined towards the crushed stone cushion layer 3 to facilitate the rapid drainage of rainwater within the drainage pipe 4. Simultaneously, curing water is injected into the sealed drainage pipe 4. The curing water within the drainage pipe 4 permeates into the lime-stabilized soil base 1 through capillary action, replenishing the curing water supply and reducing the possibility of drying shrinkage in the lime-stabilized soil base 1. At the same time, it reduces the possibility of cracks appearing in the asphalt layer 2. Furthermore, the capillary pores 5 reduce the possibility of fine impurities in the lime soil entering the drainage pipe 4, facilitating drainage from the drainage pipe 4.

[0022] Reference Figure 3 and Figure 4 In this embodiment, the roadbed structure also includes a connecting pipe 6, which is arranged along the length of the lime-stabilized soil base 1. The connecting pipe 6 is used to connect to the seepage pipe 4, and the end of the connecting pipe 6 connected to the seepage pipe 4 is close to the port of the seepage pipe 4. Furthermore, the connecting pipe 6 is located above the seepage pipe 4 and is connected to the seepage pipe 4 through an integrally formed vertical pipe 7. The connecting pipe 6 is used to introduce air to drive the air flow in the seepage pipe 4 and dry the interior of the lime-stabilized soil base 1. After the seepage pipe 4 drains the rainwater in the lime-stabilized soil base 1, one end of the seepage pipe 4 is sealed, and air is injected into the connecting pipe 6 using an air pump or fan. The injected air flows rapidly in the connecting pipe 6, and the rapidly flowing air generates a negative pressure space with a certain pressure at the vertical pipe 7, so as to carry the air in the seepage pipe 4 to the connecting pipe 6, thereby accelerating the drying speed of the lime-stabilized soil base 1 and reducing the possibility of continuous damage to the lime-stabilized soil base 1 due to rainwater.

[0023] Reference Figure 4 and Figure 5 After long-term use, the drainage function of the seepage pipe 4 is affected. To restore the drainage function of the seepage pipe 4, a cleaning disc 8 is installed inside the seepage pipe 4. The inner diameter of the cleaning disc 8 is smaller than the inner diameter of the seepage pipe 4. The cleaning disc 8 is slidably installed inside the seepage pipe 4 and slides along the length of the seepage pipe 4. It also includes a driving component for moving the cleaning disc 8 along the seepage pipe 4 to remove the soil inside the seepage pipe 4. The driving component includes a connecting rope 9 installed on both sides of the cleaning disc 8. The connecting rope 9 is fixedly connected to the cleaning disc 8. The connecting end of the connecting rope 9 and the cleaning disc 8 is located at the center of the cleaning disc 8. The free end of the connecting rope 9 is located outside the seepage pipe and is wound on the seepage pipe. The initial state of the cleaning disc 8 is that it is laid inside the seepage pipe 4.

[0024] When the drainage effect of the seepage pipe 4 decreases, the cleaning disc 8 is moved by pulling the connecting rope 9. The cleaning disc 8 scrapes away the mud and sand in the seepage pipe 4 and moves out from the port of the seepage pipe 4 to restore the drainage effect of the seepage pipe 4. Furthermore, the diameter of the cleaning disc 8 is smaller than the diameter of the seepage pipe 4, which makes it easier for the cleaning disc 8 to move along the seepage pipe 4 when removing mud and sand. Furthermore, the connection end of the connecting rope 9 and the cleaning disc 8 is located at the center of the cleaning disc 8. When the seepage pipe 4 is performing its drainage function, the cleaning disc 8 lies inside the seepage pipe 4, thereby reducing the obstruction of rainwater flow caused by the cleaning disc 8.

[0025] Reference Figure 4 and Figure 6 When the cleaning disc 8 moves the silt out of the seepage pipe 4, the silt easily enters the vertical pipe 7 when it reaches the vertical pipe 7, obstructing airflow. Therefore, in this embodiment, a baffle 10 is rotatably installed at the connection between the connecting pipe 6 and the seepage pipe 4. The baffle 10 is located at the connection between the vertical pipe 7 and the seepage pipe 4, and the rotation axis of the baffle 10 is perpendicular to the axis of the connecting pipe 6 and the seepage pipe 4. The baffle 10 closes the connecting pipe 6, and the diameter of the baffle 10 is smaller than the diameter of the seepage pipe 4. The baffle 10 is initially in a vertical position and perpendicular to the axis of the seepage pipe 4. A baffle 11 is provided inside the connecting pipe 6 to prevent the baffle 10 from being in a closed state of the connecting pipe 6. When the cleaning disc 8 moves the mud and sand and comes into contact with the baffle 10, the mud and sand push the baffle 10 to rotate. The baffle 10 rotates into the vertical pipe 7 and is supported by the baffle 11 to block the vertical pipe 7. After the baffle 10 blocks the vertical pipe 7, the mud and sand pass through the baffle 10 and move out through the port of the seepage pipe 4.

[0026] Reference Figure 4In this embodiment, the sealing component includes a plug head 12 slidably disposed at the end of the seepage pipe 4. The plug head 12 slides along the axial direction of the seepage pipe 4. The plug head 12 is conical and inserted into the seepage pipe 4. The sealing component also includes a driving component for driving the plug head 12 to slide. The driving component includes an electric push rod on the seepage pipe 4. The length direction of the output shaft of the electric push rod is parallel to the direction of the seepage pipe 4. Further, a mounting plate is fixedly disposed on the output shaft of the electric push rod, and the plug head 12 is fixedly disposed on the mounting plate. When opening and closing the seepage pipe 4, the electric push rod is activated, and the electric push rod drives the mounting plate to move. The movement of the mounting plate drives the plug head 12 to move, thereby opening and closing the seepage pipe 4. The operation is simple and convenient.

[0027] Reference Figure 4 The lime-stabilized soil base course 1 in the roadbed mainly serves to transfer the load to the crushed stone cushion layer 3. During this process, the seepage pipe 4 is prone to damage. Therefore, in this embodiment, a pressure relief plate is provided at the part of the seepage pipe 4 located in the lime-stabilized soil base course 1. The pressure relief plate is in the shape of a herringbone. The seepage pipe 4 is located below the pressure relief plate and the space between the seepage pipe 4 and the pressure relief plate is filled with lime soil. Under the action of the pressure relief plate, the load on the lime-stabilized soil base course 1 is transferred along the inclined surface of the pressure relief plate, thereby reducing the direct load on the seepage pipe 4 and reducing the possibility of pressure damage to the seepage pipe 4.

[0028] Reference Figure 2 To further reduce the possibility of damage to the seepage pipe 4, a groove 13 is provided on the top surface of the lime-stabilized soil base 1. The groove 13 is opened along the width direction of the lime-stabilized soil base 1 and is located directly above the seepage pipe 4. The groove 13 is filled with an asphalt layer 2 and is used to distribute the load to both sides of the groove 13. Under the action of the groove 13, the load transmitted on the asphalt layer 2 (such as a wheel) is engaged on the top of the groove 13 when the wheel runs to the groove 13, rather than acting on the bottom of the groove 13, thereby reducing the possibility of the load acting on the seepage pipe 4 and further reducing the possibility of damage to the seepage pipe 4.

[0029] Reference Figure 2 In this application, the groove 13 has an arc-shaped surface 14 on its edge facing the axial direction; the arc-shaped surface 14 reduces damage to vehicles and the like.

[0030] Reference Figure 2 To further improve the drainage effect of the lime-stabilized soil base 1, multiple layers of seepage pipes 4 are provided along the thickness direction of the lime-stabilized soil base 1 and are all located directly below the groove 13.

[0031] The implementation principle of a lime-soil improved roadbed structure in this application embodiment is as follows: During the construction of the lime-stabilized soil base 1, a drainage pipe 4 is buried within the lime-stabilized soil base 1. When rainwater infiltrates into the lime-stabilized soil base 1, the rainwater gradually seeps into the drainage pipe 4 and enters the drainage pipe 4 through capillary action, then exits from the end of the drainage pipe 4. This accelerates the drainage efficiency of rainwater, reduces the possibility of damage to the lime-stabilized soil base 1 due to rainwater, and improves the stability of the lime-stabilized soil base 1. Both ends of the drainage pipe 4 are inclined towards the crushed stone cushion layer 3 to facilitate the rapid drainage of rainwater within the drainage pipe 4. Simultaneously, curing water is injected into the sealed drainage pipe 4. The curing water within the drainage pipe 4 permeates into the lime-stabilized soil base 1 through capillary action, replenishing the curing water supply and reducing the possibility of drying shrinkage in the lime-stabilized soil base 1. At the same time, it reduces the possibility of cracks appearing in the asphalt layer 2. Furthermore, the capillary pores 5 reduce the possibility of fine impurities in the lime soil entering the drainage pipe 4, facilitating drainage from the drainage pipe 4.

[0032] 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 lime-soil improved roadbed structure, characterized in that: The system includes a lime-stabilized soil base course (1), which is located between an asphalt layer (2) and a crushed stone cushion layer (3). The lime-stabilized soil base course (1) is equipped with multiple permeable pipes (4). The periphery of each permeable pipe (4) has multiple capillary pores (5). Water accumulated in the lime-stabilized soil base course (1) permeates into the permeable pipes (4) through the capillary pores (5). Both ends of each permeable pipe (4) are located outside the lime-stabilized soil base course (1) and are open. The permeated water in the permeable pipes (4) is discharged through the ends. Both ends of each permeable pipe (4) are inclined toward the crushed stone cushion layer (3). Both ends of the seepage pipe (4) are provided with sealing components. The sealing components include a plug head (12) that is slidably disposed at the end of the seepage pipe (4). The plug head (12) slides along the axial direction of the seepage pipe (4). The plug head (12) is conical and inserted into the seepage pipe (4). The sealing components also include a driving component for driving the plug head (12) to slide. The plug head (12) is used to seal the port of the seepage pipe (4) so ​​as to inject curing water into the seepage pipe (4) in the sealed state. The curing water permeates into the lime-stabilized soil base (1) through the capillary pores (5) to replenish the lime-stabilized soil base (1) with curing water.

2. The lime-soil improved roadbed structure according to claim 1, characterized in that: The roadbed structure also includes a connecting pipe (6), which is used to connect the seepage pipe (4), and the connecting end of the connecting pipe (6) and the seepage pipe (4) is close to the port of the seepage pipe (4). The connecting pipe (6) is used to introduce air and drive the air flow in the seepage pipe (4) to dry the interior of the lime-stabilized soil base (1).

3. The lime-soil improved roadbed structure according to claim 1, characterized in that: A cleaning disc (8) is provided inside the seepage pipe (4). The inner diameter of the cleaning disc (8) is smaller than the inner diameter of the seepage pipe (4). The cleaning disc (8) is slidably disposed inside the seepage pipe (4). The cleaning disc (8) slides along the length of the seepage pipe (4). It also includes a driving component for driving the cleaning disc (8) to slide along the seepage pipe (4) and remove the soil inside the seepage pipe (4). The driving component includes connecting ropes (9) disposed on the two side plates of the cleaning disc (8). The connecting end of the connecting rope (9) and the cleaning disc (8) is located at the center of the cleaning disc (8). The free end of the connecting rope (9) is located outside the seepage pipe and is wound on the seepage pipe. The initial state of the cleaning disc (8) is that it is laid inside the seepage pipe (4).

4. The lime-soil improved roadbed structure according to claim 2, characterized in that: A baffle (10) is rotatably provided at the connection between the connecting pipe (6) and the seepage pipe (4). The rotation axis of the baffle (10) is perpendicular to the axis of the connecting pipe (6) and the seepage pipe (4). The baffle (10) closes the connecting pipe (6). The diameter of the baffle (10) is smaller than the diameter of the seepage pipe (4). The initial position of the baffle (10) is vertical and perpendicular to the axis of the seepage pipe (4). A stop block (11) is provided inside the connecting pipe (6). The stop block (11) is used to prevent the baffle (10) from being in a closed state of the connecting pipe (6).

5. The lime-soil improved roadbed structure according to claim 1, characterized in that: The permeation pipe (4) is located within the lime-stabilized soil base (1) and is equipped with a pressure relief plate. The pressure relief plate is in the shape of a herringbone. The permeation pipe (4) is located below the pressure relief plate and the space between the permeation pipe (4) and the pressure relief plate is filled with lime soil.

6. The lime-soil improved roadbed structure according to claim 1, characterized in that: The top surface of the lime-stabilized soil base (1) is provided with a groove (13). The groove (13) is opened along the width direction of the lime-stabilized soil base (1). The groove (13) is located directly above the seepage pipe (4). The groove (13) is filled with an asphalt layer (2). The groove (13) is used to distribute the load to both sides of the groove (13).

7. The lime-soil improved roadbed structure according to claim 6, characterized in that: The groove (13) has an arc-shaped surface (14) on its edge facing the axis.

8. The lime-soil improved roadbed structure according to claim 7, characterized in that: The seepage pipe (4) is arranged in multiple layers along the thickness direction of the lime stabilized soil base (1) and is located directly below the groove (13).

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