Roadbed structure
By introducing a combination of water storage chambers and drainage pipes into the roadbed structure, and using the gravity preloading of accumulated water, the problems of roadbed instability and differential settlement in soft soil areas were solved, and vehicle traffic and environmental protection were achieved during construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG INST OF COMM CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-12
AI Technical Summary
When constructing roadbeds in soft soil areas, the instability of the roadbed structure and the control of differential settlement after construction are prominent problems, which lead to the failure of drainage slope, pose a safety hazard of vehicle skidding, and the existing preloading methods occupy road resources and damage the ecological environment.
The roadbed is constructed by sequentially installing a flexible layer, a first rigid layer, a water storage layer, and a pavement structure layer from bottom to top. By using a combination of water storage chambers and drainage pipes, the roadbed is preloaded by gravity through the water accumulated in the water storage chambers to reduce settlement. Vehicle traffic is allowed during construction, and clean water energy is used to protect the environment.
It effectively reduces the deformation of the roadbed after construction, reduces the amount of construction work, protects the ecological environment, improves construction efficiency, and ensures the safety of vehicle traffic.
Smart Images
Figure CN224227581U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of highway subgrade technology, and in particular to a subgrade structure. Background Technology
[0002] When constructing roadbeds in soft soil areas, the risks of roadbed structural instability and the control of post-construction differential settlement are particularly prominent. These problems lead to the failure of road surface drainage slope, which prevents the timely drainage of water on the road surface, causing vehicles to skid and posing safety hazards.
[0003] To address the aforementioned issues, the project employs preloading of the roadbed during the construction phase to reduce post-construction settlement and ensure proper drainage slope. However, the earthwork or water-filled bags used for preloading occupy road space, obstructing vehicle traffic and necessitating the construction of temporary access roads, thus increasing workload. Furthermore, the extraction of earthwork can damage the ecological environment. Utility Model Content
[0004] The purpose of this invention is to provide a roadbed structure that allows vehicle traffic during roadbed preloading, reducing workload and protecting the ecological environment.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A roadbed structure, comprising:
[0007] The following layers are arranged sequentially from bottom to top: a flexible layer, a first rigid layer, a water storage layer, a second rigid layer, and a pavement structure layer. The first rigid layer is provided with a drainage pipe, and the water storage layer is provided with a water storage chamber. Water accumulated in the pavement structure layer can flow into the water storage chamber. When the drainage pipe is in the open state, the water accumulated in the water storage chamber flows out along the drainage pipe. When the drainage pipe is in the closed state, the water accumulated in the water storage chamber exerts force on the first rigid layer.
[0008] In the aforementioned roadbed structure, the water storage layer includes a plurality of water storage chambers, which are spaced apart along a first direction and / or a second direction, wherein the first direction is perpendicular to the second direction.
[0009] In the aforementioned roadbed structure, the water storage chambers in adjacent rows are staggered, and the water storage chambers in adjacent columns are staggered.
[0010] The aforementioned roadbed structure includes a drainage pipe comprising multiple sets of drainage channels located below the water storage chamber. Each set of drainage channels extends along the first direction and communicates with the water storage chamber above it. The multiple sets of drainage channels are spaced apart along the second direction.
[0011] In the aforementioned roadbed structure, the second rigid layer is provided with a plurality of water injection holes, which are located above the water storage cavity and are connected to the water injection holes.
[0012] In the aforementioned roadbed structure, each of the water injection holes is equipped with a filter screen.
[0013] In the aforementioned roadbed structure, the bottom end of the water storage chamber is provided with a connecting member, which has a connecting channel that connects the water storage chamber and the drainage pipe.
[0014] In the aforementioned roadbed structure, the first rigid layer is provided with a drainage hole, which is located below the water storage chamber, and the connecting member is provided inside the drainage hole.
[0015] In the aforementioned roadbed structure, the connecting component is a T-junction, one of the channels of which is located in the drainage hole to connect to the water storage chamber, and the other two channels are respectively connected to the drainage pipes on both sides of the water storage chamber.
[0016] The aforementioned roadbed structure includes a drainage pipe equipped with a valve.
[0017] The beneficial effects of this utility model are:
[0018] The roadbed structure provided by this utility model, during construction, consists of a flexible layer, a first rigid layer, a water-retaining layer, a second rigid layer, and a pavement structure layer constructed sequentially from bottom to top. The first rigid layer includes drainage pipes, and the water-retaining layer includes a water-retaining chamber. The water-retaining chamber, drainage pipes, and pavement structure layer are connected. During the preloading stage of construction, the drainage pipes are closed, and water is injected into the water-retaining chamber. The gravity of the accumulated water is used to preload the roadbed, reducing the deformation of the roadbed after construction. Furthermore, the pavement structure layer is free of obstructions, allowing vehicle passage without the need for additional access roads, thus reducing construction workload. The use of clean water energy for preloading the roadbed also protects the environment. After construction, the drainage pipes are opened, allowing water accumulated on the pavement structure layer to flow into the water-retaining layer and then drain out through the drainage pipes. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the roadbed structure provided in an embodiment of the present invention;
[0020] Figure 2 This is a schematic diagram showing the connection between the water storage chamber and the drainage pipe provided in this embodiment of the utility model;
[0021] Figure 3 This is a schematic diagram showing the connection between the connecting member, the water storage chamber, and the drainage pipe provided in this embodiment of the utility model;
[0022] Figure 4 This is a schematic diagram of the structure of the precast block provided in an embodiment of the present invention.
[0023] In the picture:
[0024] 1. Flexible layer;
[0025] 2. First rigid layer; 21. Drainage pipe; 211. Drainage channel;
[0026] 3. Water storage layer; 31. Water storage cavity; 32. Precast block; 321. Connecting part;
[0027] 4. Second rigid layer; 41. Water injection hole;
[0028] 5. Road surface structural layer;
[0029] 6. Connecting components. Detailed Implementation
[0030] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0034] The roadbed structure provided by this utility model allows vehicles to pass during the roadbed preloading period, which can reduce workload, improve work efficiency, and protect the ecological environment.
[0035] like Figures 1 to 4As shown, the roadbed structure includes, from bottom to top, a flexible layer 1, a first rigid layer 2, a water storage layer 3, a second rigid layer 4, and a pavement structure layer 5. The first rigid layer 2 is provided with a drainage pipe 21, and the water storage layer 3 is provided with a water storage chamber 31. The water accumulated in the pavement structure layer 5 can flow into the water storage chamber 31. When the drainage pipe 21 is in the open state, the water accumulated in the water storage chamber 31 flows out along the drainage pipe 21. When the drainage pipe 21 is in the closed state, the water accumulated in the water storage chamber 31 exerts force on the first rigid layer 2.
[0036] The roadbed structure provided by this utility model, during construction, consists of a flexible layer 1, a first rigid layer 2, a water storage layer 3, a second rigid layer 4, and a pavement structure layer 5, constructed sequentially from bottom to top. The first rigid layer 2 includes a drainage pipe 21, and the water storage layer 3 includes a water storage chamber 31. The water storage chamber 31, drainage pipe 21, and pavement structure layer 5 are connected. During the preloading stage of construction, the drainage pipe 21 is closed, and water is injected into the water storage chamber 31. The gravity of the accumulated water is used to preload the roadbed, reducing the deformation of the roadbed after construction. Furthermore, the pavement structure layer 5 is unobstructed, allowing vehicle passage without the need for additional access roads, thus reducing construction workload. It also uses clean water energy for preloading the roadbed, protecting the environment. After construction, the drainage pipe 21 is opened, and the accumulated water on the pavement structure layer 5 flows into the water storage layer 3 and is then discharged through the drainage pipe 21.
[0037] Flexible layer 1 is designed to level the surface, distribute loads, prevent contamination or water seepage of the substrate, and improve structural strength. During construction, natural sand or gravel can be used for leveling. Afterward, a waterproof coating is applied to the upper surface of flexible layer 1 to enhance waterproofing.
[0038] The first rigid layer 2 can be formed by pouring concrete. The first rigid layer 2 includes a drainage pipe 21. During construction, the first rigid layer 2 can be poured in two stages. After pouring the first layer of concrete, the drainage pipe 21 is laid in the concrete before it has solidified. Then, the second layer of concrete is poured to ensure that the drainage pipe 21 is fixed in the first rigid layer 2 and connected to the water storage chamber 31.
[0039] For example, see Figure 1 and Figure 2 The drainage pipe 21 includes multiple sets of drainage channels 211 disposed below the water storage chamber 31. Each set of drainage channels 211 extends along a first direction and communicates with the water storage chamber 31 above it. The drainage channels 211 are spaced apart along a second direction, such as the first direction. Figure 2 As shown in the X direction, the second direction is as follows: Figure 2 As shown in the Y direction. Multiple sets of drainage channels 211 can improve drainage efficiency.
[0040] The drain pipe 21 can be directly connected to the interior of the water storage chamber 31 or indirectly connected to the interior of the water storage chamber 31. For example, a connecting member 6 is provided at the bottom end of the water storage chamber 31. The connecting member 6 has a connecting channel that connects the water storage chamber 31 and the drain pipe 21. The connecting member 6 connects the drain pipe 21 and the water storage chamber 31, facilitating the connection and allowing water accumulated in the water storage chamber 31 to flow into the drain pipe 21 through the connecting channel.
[0041] Specifically, the first rigid layer 2 is provided with a drainage hole located below the water storage chamber 31. A connecting member 6 is provided inside the drainage hole to facilitate the flow of water in the water storage chamber 31 into the drainage pipe 21 through the connecting member 6, and then discharge the water.
[0042] Specifically, see Figures 1 to 3 The connecting member 6 is a T-joint. One channel of the connecting member 6 is located in the drain hole to connect the water storage chamber 31 and the connecting member 6. The other two channels are respectively connected to the drain channels 211 on both sides of the water storage chamber 31. The connecting member 6 connects the water storage chamber 31 and the drain channels 211. Drain channels 211 are provided on both sides of the water storage chamber 31 and are connected by the connecting member 6, allowing water accumulated in multiple water storage chambers 31 to flow into the same set of drain channels 211 and then be discharged. It is not necessary to set up a separate set of drain channels 211 for each water storage chamber 31, reducing the amount of construction work and improving construction efficiency.
[0043] To ensure controlled drainage of water from the water storage chamber 31, a valve is installed in the drainage pipe 21 in this embodiment. During the pre-loading stage of construction, the valve is closed to keep the drainage pipe 21 closed, and water is injected into the water storage chamber 31. The gravity of the water inside the water storage chamber 31 is used to pre-load the roadbed, reducing the settlement of the roadbed after construction. After construction is completed, the valve is opened to keep the drainage pipe 21 open, and the water on the pavement structure layer 5 flows into the water storage layer 3 and is then discharged from the drainage pipe 21.
[0044] The water storage layer 3 can store accumulated water and apply force to the first rigid layer 2 to preload the roadbed, reducing the settlement of the roadbed after construction and improving construction quality. This embodiment does not specifically limit the material of the water storage layer 3. For example, foamed concrete can be used to form the water storage layer 3. Foamed concrete is lightweight, which can reduce the self-weight of the roadbed, thereby reducing the level of additional stress on the foundation and mitigating the problem of differential settlement of the roadbed after construction.
[0045] To improve the strength of the water storage layer 3, it can be constructed by pouring foamed concrete in layers, with reinforcing members placed between adjacent layers to enhance structural strength. In this embodiment, the reinforcing members are reinforcing meshes, which are readily available and easy to install between the two layers of foamed concrete.
[0046] The water storage layer 3 can have one or more water storage chambers 31. For example, the water storage layer 3 includes multiple water storage chambers 31, which are spaced apart along a first direction and / or a second direction, with the first direction perpendicular to the second direction. The uniform water accumulation inside the multiple water storage chambers 31 results in a more uniform force applied to the first rigid layer 2, and the multiple water storage chambers 31 improve water accumulation and drainage efficiency. Furthermore, the arrangement of the water storage chambers 31 can reduce the weight and volume of the roadbed, reduce the amount of foamed concrete used, and achieve the goal of cost reduction and efficiency improvement.
[0047] Specifically, see Figure 2 Multiple water storage chambers 31 are spaced apart along the first and second directions, with adjacent rows of water storage chambers 31 staggered and adjacent columns of water storage chambers 31 staggered. The staggered arrangement of the multiple water storage chambers 31 in a quincunx shape is compact, improving space utilization and further enhancing drainage performance.
[0048] Before pouring the water storage layer 3, a closed cavity is constructed using precast blocks 32, see [reference needed]. Figure 2 and Figure 4 The precast block 32 has a trapezoidal cross-section and a stepped connecting part 321. Four precast blocks 32 can form a cavity. Adjacent precast blocks 32 are connected by the connecting part 321. The contact surface is large, and adjacent precast blocks 32 can be fixed by adhesive. The connection is convenient and firm.
[0049] The dimensions of the precast blocks 32 are designed according to actual construction requirements. Optionally, the length of the precast blocks 32 is 85-95cm, the width is 75-80cm, and the thickness is 4-8cm. Preferably, the length of the precast blocks 32 is 90cm, the width is 78cm, and the thickness is 6cm. It can be understood that after the water storage layer 3 is poured, the space enclosed by the precast blocks 32 is the water storage cavity 31. Therefore, the precast blocks 32 are arranged in a quincunx pattern with a spacing of 90-110cm, such as 90cm, 95cm, 100cm, 105cm, and 110cm, with a preferred spacing of 100cm.
[0050] The second rigid layer 4 can evenly distribute the road surface load and reduce the pressure on the water storage layer 3. In this embodiment, see... Figure 1 The second rigid layer 4 is provided with a plurality of water injection holes 41. The water injection holes 41 are located above the water storage chamber 31 and are connected to the water storage chamber 31, so as to facilitate water injection from the water injection holes 41 into the water storage chamber 31.
[0051] Specifically, each water injection hole 41 is equipped with a filter screen to prevent debris on the road surface from entering the water storage chamber 31 and clogging the drainage pipe 21. This would prevent the water inside the water storage chamber 31 from being discharged, or even cause excessive water to overflow from the water injection hole 41, resulting in water accumulation on the road, vehicle slippage, and potential safety hazards.
[0052] The second rigid layer 4 can be formed by pouring continuously reinforced concrete. Before pouring, a perforated isolation plate can be placed on top of the water storage chamber 31, and then a steel mesh can be tied before pouring. During pouring, the water injection holes 41 should correspond one-to-one with the perforations of the isolation plate to facilitate the flow of water from the road surface into the water storage layer 3 through the water injection holes 41 and the perforations.
[0053] The roadbed structure provided by this utility model, during construction, firstly, is paved with natural gravel or crushed stone to form a flexible layer 1; then, a first rigid layer 2 is poured, during which drainage pipes 21 and connecting parts 6 are pre-embedded to connect the drainage pipes 21 and the water storage chamber 31, and a valve is installed at the drainage outlet of the drainage pipes 21; then, precast blocks 32 are spaced apart to form cavities, and foamed concrete is poured to form a water storage layer 3; next, isolation plates are tied on the water storage layer 3 and poured to form a second rigid layer 4; finally, a pavement structure layer 5 is constructed on the first rigid layer 2.
[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A roadbed structure, characterized in that, include: The structure consists of a flexible layer (1), a first rigid layer (2), a water storage layer (3), a second rigid layer (4), and a road structure layer (5) arranged sequentially from bottom to top. The first rigid layer (2) is provided with a drainage pipe (21), and the water storage layer (3) is provided with a water storage chamber (31). The water accumulated in the road structure layer (5) can flow into the water storage chamber (31). When the drainage pipe (21) is in the open state, the water accumulated in the water storage chamber (31) flows out along the drainage pipe (21). When the drainage pipe (21) is in the closed state, the water accumulated in the water storage chamber (31) exerts force on the first rigid layer (2).
2. The roadbed structure according to claim 1, characterized in that, The water storage layer (3) includes a plurality of water storage chambers (31), which are spaced apart along a first direction and / or a second direction, wherein the first direction is perpendicular to the second direction.
3. The roadbed structure according to claim 2, characterized in that, The water storage chambers (31) in adjacent rows are staggered, and the water storage chambers (31) in adjacent columns are staggered.
4. The roadbed structure according to claim 2, characterized in that, The drainage pipe (21) includes multiple sets of drainage channels (211) disposed below the water storage chamber (31). Each set of drainage channels (211) extends along the first direction and communicates with the water storage chamber (31) above it. The multiple sets of drainage channels (211) are spaced apart along the second direction.
5. The roadbed structure according to claim 1, characterized in that, The second rigid layer (4) is provided with a plurality of water injection holes (41), which are located above the water storage cavity (31) and communicate with the water injection holes (41).
6. The roadbed structure according to claim 5, characterized in that, Each of the water injection holes (41) is equipped with a filter screen.
7. The roadbed structure according to claim 1, characterized in that, The bottom end of the water storage chamber (31) is provided with a connecting member (6), the connecting member (6) has a connecting channel, and the connecting channel connects the water storage chamber (31) and the drainage pipe (21).
8. The roadbed structure according to claim 7, characterized in that, The first rigid layer (2) is provided with a drainage hole, which is located below the water storage cavity (31), and the connecting member (6) is provided inside the drainage hole.
9. The roadbed structure according to claim 8, characterized in that, The connecting member (6) is a three-way connector. One of the channels of the connecting member (6) is located in the drain hole to connect to the water storage chamber (31), and the other two channels are respectively connected to the drain pipes (21) on both sides of the water storage chamber (31).
10. The roadbed structure according to any one of claims 1-9, characterized in that, The drainage pipe (21) is equipped with a valve.