Pavement structure based on fluidized solid soil as roadbed
By using fluidized solid soil as the roadbed structure and combining it with a permeable layer design, the problems of long construction cycle and dust pollution of traditional roadbeds have been solved, and resource reuse and construction cost savings have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-03-10
AI Technical Summary
Traditional roadbed structures suffer from problems such as long construction periods, severe dust pollution, and difficulty in controlling the thickness of the roadbed transition layer.
Fluidized solid soil is used as the roadbed, including the subgrade and the main layer. The fluidized solid soil is filled by mixing tailings sand, bentonite and soil solidifying agent. Combined with the design of permeable layer and permeable asphalt layer, compaction construction is avoided.
It enables the reuse of waste resources, reduces dust pollution, controls construction thickness, saves costs, and shortens the construction cycle.
Smart Images
Figure CN223983909U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to road pavement technical field, concretely relates to a pavement structure based on fluidized solid soil as roadbed. BACKGROUND
[0002] The common roadbed structure at present is generally determined comprehensively on the basis of technical and economic demonstration according to road grade, traffic load grade, climate condition, functional requirement and local material characteristics etc. It is generally composed of the following traditional road construction materials: lime stabilized soil, cement stabilized soil, graded broken stone, graded sand and gravel etc.
[0003] The above road construction materials all involve material transportation and paving, which will inevitably bring dust and cause environmental pollution. At the same time, since the traditional road construction materials need to be rolled, a certain thickness of transition layer needs to be set below the roadbed structure to meet the mechanical rolling construction condition, and the roadbed layer can be finally constructed after rolling construction.
[0004] Therefore, the traditional roadbed structure has the problems of long construction period, serious dust pollution and difficult control of roadbed transition layer thickness. INVENTION CONTENTS
[0005] The utility model discloses a pavement structure based on fluidized solid soil as roadbed, which solves the above problems existing in the prior art.
[0006] Technical scheme: a pavement structure based on fluidized solid soil as roadbed, comprising a roadbed, wherein the roadbed comprises a lower bearing layer and a main body layer, the lower bearing layer is arranged below the main body layer, the upper end of the main body layer is arranged on a buffer layer, the upper end of the buffer layer is provided with a water permeable layer, the upper end of the water permeable layer is provided with a water permeable asphalt layer, the thickness of the lower bearing layer is 0-40cm, and the thickness of the main body layer is 40-70cm.
[0007] Preferably, the lower bearing layer is filled with fluidized solidified soil mixed by tailing sand, bentonite, water retaining agent and soil solidifying agent.
[0008] Preferably, the strength of the lower bearing layer is 28-day unconfined compressive strength R28≥0.8MPa and 7-day unconfined compressive strength R7≥0.45MPa.
[0009] Preferably, the flow expansion degree of the lower bearing layer is 120mm-180mm.
[0010] Preferably, the main body layer is filled with fluidized solidified soil mixed by tailing sand, recycled fine aggregate, bentonite and soil solidifying agent.
[0011] Preferably, the strength of the main body layer is 28-day unconfined compressive strength R28≥1.2MPa, 7-day unconfined compressive R7≥0.6MPa.
[0012] Preferably, the flow spread of the main body layer is 80mm-150mm.
[0013] Preferably, the water-permeable layer comprises a water-permeable layer body, both side edges of the water-permeable layer body are provided with flow guide pipes, and the thickness of the water-permeable layer body is 7-12cm.
[0014] Preferably, the water-permeable asphalt layer is made of porous asphalt mixture, and the thickness of the water-permeable asphalt layer is 4-10cm.
[0015] Beneficial effects: the utility model relates to a kind of road surface structure based on fluidized solid-state soil as roadbed, lower bearing layer and main body layer in the roadbed are filled with fluidized solidified soil, i.e.
[0016] Secondly, lower bearing layer and main body layer are filled with fluidized solidified soil, which can effectively control the overall construction thickness of roadbed structure, facilitate the control of engineering cost, and at the same time, without the need for roadbed structure to be rolled and constructed, construction cost is saved, and construction period is shortened. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the overall structure schematic diagram of the utility model;
[0018] Figure 2 It is table 1 of the utility model;
[0019] Figure 3 It is table 2 of the utility model.
[0020] Figure 1 Reference signs are: 1, lower bearing layer;2, main body layer;3, buffer layer;4, water-permeable layer;5, water-permeable asphalt layer;
[0021] 41, water-permeable layer body;42, flow guide pipe. DETAILED DESCRIPTION
[0022] As Figure 1As shown, this utility model provides a technical solution: a pavement structure based on fluidized solid soil as the subgrade, including a subgrade, a buffer layer 3, a permeable layer 4, and a permeable asphalt layer 5. The subgrade includes a lower layer 1 and a main layer 2. The lower layer 1 is located below the main layer 2. The buffer layer 3 is located above the main layer 2. The permeable layer 4 is located above the buffer layer 3, and the permeable asphalt layer 5 is located above the permeable layer 4. The lower layer 1 is constructed by filling a fluidized solidified soil mixture of tailings sand, bentonite, water-retaining agent, and soil stabilizer. Its thickness is 0-40cm. The strength of the lower layer 1 is a 28-day unconfined compressive strength R28 ≥ 0.8MPa and a 7-day unconfined compressive strength R7 ≥ 0.45MPa. The flow spread of the lower layer 1 is 120mm-180mm. The thickness of the lower layer 1 is selected according to different traffic load levels, based on Table 1. The main layer 2 is constructed using... Tailings sand, recycled fine aggregate, bentonite, and soil stabilizer are mixed to form a fluidized solidified soil for the main layer 2. The main layer 2 has a 28-day unconfined compressive strength R28 ≥ 1.2 MPa and a 7-day unconfined compressive strength R7 ≥ 0.6 MPa. The thickness of the main layer 2 is 40-70 cm, and the flow spread of the main layer 2 is 80 mm-150 mm. The thickness of the column layer is selected according to different traffic load levels, based on Table 2. Using the subgrade in this embodiment, i.e., the lower layer 1 and the main layer 2 are filled with fluidized solidified soil, it is possible to realize the resource reuse of waste materials. At the same time, it can effectively avoid dust pollution during the subgrade construction process. Secondly, the use of fluidized solidified soil for the lower layer 1 and the main layer 2 can effectively control the overall construction thickness of the subgrade structure, which is conducive to the control of project costs. At the same time, there is no need to compact the subgrade structure, saving construction costs and shortening the construction period.
[0023] In a further embodiment, the permeable layer 4 includes a permeable layer body 41 and a guide pipe 42. The permeable layer body 41 is disposed above the main body layer 2. In this embodiment, the permeable layer 4 adopts a centrally convex arc-shaped structure. Guide pipes 42 are installed on both sides of the permeable layer body 41. The thickness of the permeable layer body 41 is 7-12cm. The permeable asphalt layer 5 is made of porous asphalt mixture and has a thickness of 4-10cm. That is, on rainy days, with the cooperation of the arc-shaped structure of the permeable layer body 41 and the guide pipes 42, rainwater can quickly flow into the guide pipes 42 and collect, realizing the rapid collection and discharge of rainwater.
[0024] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.
Claims
1. A pavement structure based on fluidized solid soil for subgrade, characterized by, The roadbed comprises a lower bearing layer (1) and a main body layer (2), the lower bearing layer (1) is arranged below the main body layer (2), the upper end of the main body layer (2) is provided with a buffer layer (3), the upper end of the buffer layer (3) is provided with a water permeable layer (4), and the upper end of the water permeable layer (4) is provided with a water permeable asphalt layer (5), wherein the thickness of the lower bearing layer (1) is 0-40 cm, and the thickness of the main body layer (2) is 40-70 cm.
2. A pavement structure based on fluidized solid soil for subgrade according to claim 1, characterized in that, The strength of the lower bearing layer (1) is 28-day unconfined compressive strength R28≥0.8 MPa, and 7-day unconfined compressive strength R7≥0.45 MPa.
3. A pavement structure based on fluidized solid soil for subgrade according to claim 2, characterized in that, The flow expansion degree of the lower bearing layer (1) is 120-180 mm.
4. The pavement structure based on fluidized solid soil for subgrade according to claim 1, characterized in that, The strength of the main body layer (2) is 28-day unconfined compressive strength R28≥1.2 MPa, and 7-day unconfined compressive strength R7≥0.6 MPa.
5. A pavement structure based on fluidized solid soil for subgrade according to claim 1, characterized in that, The flow expansion degree of the main body layer (2) is 80-150 mm.
6. A pavement structure based on fluidized solid soil for subgrade according to claim 1, characterized in that, The water permeable layer (4) comprises a water permeable layer body (41), the water permeable layer body (41) is arranged above the main body layer (2), and flow guide pipes (42) are arranged on both side edges of the water permeable layer body (41), wherein the thickness of the water permeable layer body (41) is 7-12 cm.
7. A pavement structure based on fluidized solid soil for subgrade according to claim 1, characterized in that, The water permeable asphalt layer (5) is made of porous asphalt mixture, and the thickness of the water permeable asphalt layer (5) is 4-10 cm.