A waterproof and drainage structure for highway foam light soil roadbed widening

Abstract

The utility model discloses a highway foam light soil roadbed widening's waterproof and drainage structure belongs to highway technical field, including concrete foundation, one side of concrete foundation is provided with support step, another side fixed connection of concrete foundation has prefabricated panel. In the utility model, through setting up first water slope at the top of support step top, setting up second water slope at the top of support step side, when water enters the top of support step, utilize first water slope and flow to the water in macadam blind ditch, so that make water enter longitudinal soft type water -permeable pipe, utilize second water slope and flow to the step groove in water simultaneously, water enters transverse turning water -permeable pipe, so that make water from longitudinal soft type water -permeable pipe, transverse turning water -permeable pipe and transverse soft type water -permeable pipe fast discharge, guarantee the efficiency of drainage, and good practicality.

Description

Technical Field

[0001] This utility model relates to the field of highway technology, and more specifically, to a drainage and waterproofing structure for widening a highway foam lightweight soil subgrade. Background Technology

[0002] With the development of transportation and the acceleration of urbanization, the number of highway reconstruction and expansion projects is increasing. In the process of highway reconstruction and expansion, subgrade construction is a very important link. In order to improve construction efficiency and ensure project quality, the foamed lightweight soil subgrade construction method has emerged. However, rainwater will increase the density of the foamed lightweight soil subgrade, affecting its durability.

[0003] A search revealed that utility model patent CN221345819U discloses a drainage structure for widening a highway foamed lightweight soil subgrade. The structure includes steps installed on the slope subgrade, each step equipped with a longitudinal gravel blind drain. A longitudinal flexible permeable pipe is embedded within the longitudinal gravel blind drain. Multiple equidistant transverse drainage structures are installed on the steps, with the longitudinal flexible permeable pipes connected to the transverse drainage structures. A concrete foundation extends outward from the lowest end of the steps, and foamed lightweight soil is placed above the steps and the concrete foundation. This patent reduces corrosion of the foamed lightweight soil and decreases water pressure by adding longitudinal gravel blind drains to the steps and collecting rainwater through the longitudinal flexible permeable pipes within the drains to the transverse drainage structures, which then drain the rainwater away.

[0004] However, the above patent still has the following shortcomings: the steps are set horizontally on each layer, which makes it difficult for water to enter the longitudinal gravel blind ditch and affects the drainage efficiency. Therefore, we propose a drainage structure for widening the foamed lightweight soil subgrade of highways. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a drainage structure for widening the foamed lightweight soil subgrade of highways.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A drainage structure for widening a highway foamed lightweight soil subgrade includes a concrete foundation. A supporting step is provided on one side of the concrete foundation, and a precast panel is fixedly connected to the other side. A gravel blind drain is provided at the top of the supporting step. Multiple step grooves are provided on the supporting step. Multiple transverse grooves are provided on the top surface of the concrete foundation. A longitudinal flexible permeable pipe is fitted inside the cavity of the gravel blind drain. Multiple transverse turning permeable pipes are fixedly connected to the sides of the longitudinal flexible permeable pipes. The multiple transverse turning permeable pipes are respectively fitted inside the cavity of the step grooves. The ends of the multiple transverse turning permeable pipes extend into the cavity of the transverse grooves and are fixedly connected to transverse flexible permeable pipes. The ends of the transverse flexible permeable pipes extend to the outside of the concrete foundation. A layer of foamed lightweight soil is provided between the supporting step and the precast panel, and at the top of the concrete foundation. A first drainage slope is provided on the top surface of the top of the supporting step, and second drainage slopes are provided on the top surface of the side of the supporting step, located on both sides of the step groove.

[0008] As a preferred embodiment of this utility model, a first gravel layer is provided on the outer side of the longitudinal flexible permeable pipe and in the inner cavity of the gravel blind ditch; a second gravel layer is provided on the outer side of the transverse turning permeable pipe and in the inner cavity of the stepped groove; and a third gravel layer is provided on the outer side of the transverse flexible permeable pipe and in the inner cavity of the transverse groove.

[0009] As a preferred embodiment of this utility model, the longitudinal flexible permeable pipe, the transverse turning permeable pipe and the transverse flexible permeable pipe are all covered with permeable geotextile on their outer sides.

[0010] As a preferred embodiment of this utility model, the outer sides of the longitudinal flexible permeable pipe, the transverse turning permeable pipe, and the transverse flexible permeable pipe are all fitted with U-shaped nails.

[0011] As a preferred embodiment of this utility model, a steel mesh is provided inside the foamed lightweight soil layer and between the supporting steps and the precast panel.

[0012] As a preferred embodiment of this utility model, an impermeable geomembrane is provided on the top of the foamed lightweight soil layer.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] In this invention, a first water-guiding slope is provided on the top surface of the top of the supporting step, and a second water-guiding slope is provided on the top surface of the side of the supporting step. When water enters the top of the supporting step, the first water-guiding slope guides the water to the gravel blind ditch so that the water can enter the longitudinal flexible permeable pipe. At the same time, the second water-guiding slope guides the water to the step groove so that the water can enter the transverse turning permeable pipe. This allows the water to be quickly discharged from the longitudinal flexible permeable pipe, the transverse turning permeable pipe, and the transverse flexible permeable pipe, ensuring drainage efficiency and good practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the supporting step structure of this utility model;

[0017] Figure 3 This is a cross-sectional schematic diagram of the supporting step of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the permeable geotextile of this utility model.

[0019] The labels in the diagram are as follows: 1. Concrete foundation; 2. Supporting steps; 3. Precast panels; 4. Crushed stone blind drain; 5. Longitudinal flexible permeable pipe; 6. Stepped trench; 7. Transverse trench; 8. Transverse turning permeable pipe; 9. Transverse flexible permeable pipe; 10. Reinforcing mesh; 11. Foamed lightweight soil layer; 12. Impermeable geomembrane; 13. First drainage slope; 14. Second drainage slope; 15. First crushed stone layer; 16. Second crushed stone layer; 17. Third crushed stone layer; 18. Permeable geotextile; 19. U-shaped nail. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example 1:

[0024] Please see Figure 1-4 A drainage structure for widening a highway foam lightweight soil subgrade includes a concrete foundation 1. A supporting step 2 is provided on one side of the concrete foundation 1, and a precast panel 3 is fixedly connected to the other side of the concrete foundation 1. A gravel blind drain 4 is provided at the top of the supporting step 2. Multiple step grooves 6 are provided on the supporting step 2. Multiple transverse grooves 7 are provided on the top surface of the concrete foundation 1. A longitudinal flexible permeable pipe 5 is fitted inside the cavity of the gravel blind drain 4. Multiple transverse turning permeable pipes 8 are fixedly connected to the sides of the longitudinal flexible permeable pipe 5. The turning permeable pipes 8 are respectively fitted into the inner cavity of the stepped groove 6. The ends of the multiple transverse turning permeable pipes 8 extend into the inner cavity of the transverse groove 7 and are fixedly connected to transverse flexible permeable pipes 9. The ends of the transverse flexible permeable pipes 9 extend to the outside of the concrete foundation 1. A foamed lightweight soil layer 11 is provided between the supporting step 2 and the precast panel 3 and at the top of the concrete foundation 1. A first water guiding slope 13 is provided on the top surface of the supporting step 2. A second water guiding slope 14 is provided on the top surface of the side of the supporting step 2 and on both sides of the stepped groove 6.

[0025] In this embodiment, the first water guiding slope 13 is inclined toward the gravel blind drain 4, and the second water guiding slope 14 is inclined toward the step groove 6, so as to ensure that the water at the top of the supporting step 2 can flow into the gravel blind drain 4 and the water on the top side of the supporting step 2 can flow into the inner cavity of the step groove 6.

[0026] For details, please refer to Figures 1 to 3 A first gravel layer 15 is provided on the outside of the longitudinal flexible permeable pipe 5 and in the inner cavity of the gravel blind ditch 4; a second gravel layer 16 is provided on the outside of the transverse turning permeable pipe 8 and in the inner cavity of the stepped groove 6; and a third gravel layer 17 is provided on the outside of the transverse flexible permeable pipe 9 and in the inner cavity of the transverse groove 7.

[0027] In this embodiment, the first crushed stone layer 15, the second crushed stone layer 16, and the third crushed stone layer 17 can effectively remove impurities and sediments from the water, provide good support, help disperse the upper load, prevent uneven settlement of the foundation, and enhance the overall stability of the foundation.

[0028] For details, please refer to Figures 2 to 4 The longitudinal flexible permeable pipe 5, the transverse turning permeable pipe 8 and the transverse flexible permeable pipe 9 are all covered with permeable geotextile 18.

[0029] In this embodiment, the permeable geotextile 18 is used to prevent soil from entering the longitudinal flexible permeable pipe 5, the transverse turning permeable pipe 8, and the transverse flexible permeable pipe 9.

[0030] For details, please refer to Figures 2 to 4 U-shaped nails 19 are fitted on the outside of the longitudinal flexible permeable pipe 5, the transverse turning permeable pipe 8 and the transverse flexible permeable pipe 9.

[0031] In this embodiment, the longitudinal flexible permeable pipe 5 is fixed in the gravel blind ditch 4 by U-shaped nails 19, the transverse turning permeable pipe 8 is fixed in the stepped groove 6 by U-shaped nails 19, and the transverse flexible permeable pipe 9 is fixed in the transverse groove 7 by U-shaped nails 19.

[0032] For details, please refer to Figure 1 A steel mesh 10 is provided inside the foamed lightweight soil layer 11 and between the supporting steps 2 and the precast panel 3.

[0033] In this embodiment, the steel mesh 10 is used to increase the connection strength between the foamed lightweight soil layer 11 and the supporting steps 2 and prefabricated panels 3.

[0034] For details, please refer to Figure 1 An impermeable geomembrane 12 is installed on top of the foamed lightweight soil layer 11.

[0035] Working principle: When rainwater moves through the foamed lightweight soil layer 11 to the top of the supporting step 2, the water at the top of the supporting step 2 is guided by the first drainage slope 13 into the gravel blind ditch 4, and the water in the gravel blind ditch 4 enters the longitudinal flexible permeable pipe 5. The water in the longitudinal flexible permeable pipe 5 is discharged from the transverse turning permeable pipe 8 and the transverse flexible permeable pipe 9. In addition, the water on the top surface of the side of the supporting step 2 is guided by the second drainage slope 14 into the step groove 6. At this time, the water in the step groove 6 enters the transverse turning permeable pipe 8, and the water in the transverse turning permeable pipe 8 is discharged from the transverse flexible permeable pipe 9.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A drainage and waterproofing structure for widening a highway foamed lightweight soil subgrade, comprising a concrete foundation (1), characterized in that: A supporting step (2) is provided on one side of the concrete foundation (1), and a precast panel (3) is fixedly connected to the other side of the concrete foundation (1). A gravel blind drain (4) is provided at the top of the supporting step (2). Multiple step grooves (6) are provided on the supporting step (2). Multiple transverse grooves (7) are provided on the top surface of the concrete foundation (1). A longitudinal flexible permeable pipe (5) is fitted inside the cavity of the gravel blind drain (4). Multiple transverse turning permeable pipes (8) are fixedly connected to the side of the longitudinal flexible permeable pipe (5). The multiple transverse turning permeable pipes (8) are respectively fitted on the step. The inner cavity of the groove (6) has multiple transverse turning permeable pipes (8) whose ends extend into the inner cavity of the transverse groove (7) and are fixedly connected to transverse flexible permeable pipes (9). The ends of the transverse flexible permeable pipes (9) extend to the outside of the concrete foundation (1). A layer of foamed lightweight soil (11) is provided between the supporting step (2) and the precast panel (3) and at the top of the concrete foundation (1). A first water guiding slope (13) is provided on the top surface of the top of the supporting step (2). A second water guiding slope (14) is provided on the top surface of the side of the supporting step (2) and on both sides of the step groove (6).

2. The drainage and waterproofing structure for widening a highway foam lightweight soil subgrade according to claim 1, characterized in that: A first gravel layer (15) is provided on the outside of the longitudinal flexible permeable pipe (5) and in the inner cavity of the gravel blind ditch (4). A second gravel layer (16) is provided on the outside of the transverse turning permeable pipe (8) and in the inner cavity of the stepped groove (6). A third gravel layer (17) is provided on the outside of the transverse flexible permeable pipe (9) and in the inner cavity of the transverse groove (7).

3. The drainage and waterproofing structure for widening a highway foam lightweight soil subgrade according to claim 1, characterized in that: The longitudinal flexible permeable pipe (5), the transverse turning permeable pipe (8) and the transverse flexible permeable pipe (9) are all covered with permeable geotextile (18).

4. The drainage and waterproofing structure for widening a highway foam lightweight soil subgrade according to claim 1, characterized in that: U-shaped nails (19) are fitted on the outside of the longitudinal flexible permeable pipe (5), the transverse turning permeable pipe (8) and the transverse flexible permeable pipe (9).

5. The drainage and waterproofing structure for widening a highway foam lightweight soil subgrade according to claim 1, characterized in that: A steel mesh (10) is provided inside the foamed lightweight soil layer (11) and between the supporting steps (2) and the precast panel (3).

6. The drainage and waterproofing structure for widening a highway foam lightweight soil subgrade according to claim 1, characterized in that: An impermeable geomembrane (12) is provided on top of the foamed lightweight soil layer (11).

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