Highway subgrade reinforcing structure

Abstract

The utility model discloses a highway subgrade reinforcing structure which comprises a subgrade main body, the bottom of the subgrade main body is a soil base layer, the top of the subgrade main body is a pavement layer, and the subgrade main body comprises a soil and stone reinforcing layer, a continuous arch concrete reinforcing layer and a subgrade filling layer which are sequentially arranged from bottom to top. The roadbed structure is simple in structure, high in construction convenience, short in period and low in construction cost, the roadbed structure is improved, the soil and stone reinforcing layer, the multi-arch-shaped concrete reinforcing layer and the roadbed filling layer are sequentially arranged from bottom to top, and the soil and stone reinforcing layer and the multi-arch-shaped concrete are combined to act, so that the roadbed structure is improved. Meanwhile, the multi-arch-shaped concrete reinforcing layer can form an arch-soil cooperative bearing system, it can be effectively guaranteed that the roadbed body has high stability and bearing capacity, settlement of the roadbed structure is avoided, and the roadbed structure is especially suitable for unfavorable geological areas such as soft soil areas, expansive soil and frozen soil and is wide in application range and high in generalization performance.

Description

A highway subgrade reinforcement structure Technical Field

[0001] This utility model relates to a roadbed reinforcement structure and belongs to the field of roadbed construction technology. Background Technology

[0002] The roadbed is the fundamental structure of the pavement, bearing the dual responsibility of transmitting vehicle loads and mitigating the impact of the natural environment. Its stability directly affects the service life of the pavement and driving safety. With the increasing density of my country's transportation network, heavy traffic and road sections with complex geological conditions place higher demands on the bearing capacity and durability of the roadbed. Traditional plain soil roadbeds are prone to uneven settlement and slope slippage in collapsible loess, soft soil areas, or high embankment sections, directly affecting pavement smoothness and driving safety. Statistics show that in areas with unfavorable geological conditions such as soft soil, expansive soil, and frozen soil, the roadbed defect rate can reach as high as 32%, highlighting the necessity of reinforcement technologies.

[0003] Patent document CN 214831576 U discloses a roadbed reinforcement structure for preventing settlement, including a pavement, a reinforced concrete layer, a bedrock layer, and a soil-rock reinforcement layer. An arch-shaped reinforcement layer is provided between the soil-rock reinforcement layer and the reinforced concrete layer. This arch-shaped reinforcement layer includes several reinforcement plates, which are spliced ​​together along the road's extension direction. The reinforcement plates are arc-shaped, with their concave surfaces facing the bedrock layer. It also includes a support device for supporting the reinforcement plates. This structure improves the roadbed's resistance to settlement. However, its structure is complex, construction costs are high, and the structures on both sides of the arch-shaped reinforcement layer are relatively weak, resulting in insufficient roadbed strength and stability. Summary of the Invention

[0004] Therefore, the purpose of this utility model is to provide a roadbed reinforcement structure that can overcome the shortcomings of the prior art.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A roadbed reinforcement structure includes a roadbed body, with a soil base layer at the bottom and a pavement layer at the top. The roadbed body includes, from bottom to top, a soil-rock reinforcement layer, a continuous arch-shaped concrete reinforcement layer, and a roadbed fill layer.

[0007] Furthermore, the arched concrete reinforcement layer includes a first arched structure disposed within the pavement layer and a second arched structure symmetrically disposed on both sides of the first arched structure. The first arched structure and the second arched structure are connected to form a mutually dependent arched structure.

[0008] Furthermore, the first arch structure and the second arch structure are formed by cast-in-place process or by splicing precast concrete blocks.

[0009] Furthermore, a waterproof layer is provided on the top side of the arched concrete reinforcement layer.

[0010] Furthermore, a drainage ditch structure is provided at the top of the second arch structure, and a filter layer is provided on the side of the drainage ditch structure near the main body of the roadbed.

[0011] Furthermore, it also includes several grouting anchors that penetrate the subgrade fill layer, the arched concrete reinforcement layer, and the soil and rock reinforcement layer.

[0012] The beneficial effects disclosed in this utility model are:

[0013] This utility model features a simple structure, convenient construction, short construction period, and low construction cost. It improves the roadbed structure by using a soil-rock reinforcement layer, a continuous arch concrete reinforcement layer, and a roadbed fill layer arranged sequentially from bottom to top. The soil-rock reinforcement layer and the continuous arch concrete work together, and the continuous arch concrete reinforcement layer forms an "arch-soil collaborative load-bearing system," which can effectively ensure that the main body of the roadbed has strong stability and bearing capacity, and avoid settlement of the roadbed structure. It is especially suitable for areas with adverse geological conditions such as soft soil, expansive soil, and frozen soil, and has a wide range of applications and high promotion potential.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings, wherein:

[0016] Figure 1 is a schematic diagram of the structure of this utility model.

[0017] In the diagram, 1. Main roadbed; 101. Soil and rock reinforcement layer; 102. Continuous arch concrete reinforcement layer; 1021. First arch structure; 1022. Second arch structure; 103. Roadbed fill layer; 104. Waterproof layer; 2. Subgrade; 3. Pavement layer; 4. Drainage ditch structure; 5. Filter layer; 6. Grouting anchor. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] Example 1

[0020] As shown in Figure 1, a roadbed reinforcement structure includes a roadbed body 1, with a soil base layer 2 at the bottom and a pavement layer 3 at the top. The roadbed body 1 includes a soil and rock reinforcement layer 101, a continuous arch concrete reinforcement layer 102, and a roadbed fill layer 103 arranged sequentially from bottom to top.

[0021] The arched concrete reinforcement layer 102 includes a first arched structure 1021 disposed within the pavement layer 3 and a second arched structure 1022 symmetrically disposed on both sides of the first arched structure 1021. The first arched structure 1021 and the second arched structure 1022 are connected to form a mutually dependent arched structure. The first arched structure 1021 can effectively disperse the pressure from the pavement layer 3 above, while the second arched structure 1022 provides support for both sides of the first arched structure 1021, forming an "arch-soil collaborative load-bearing system," which can effectively reduce differential settlement and is especially suitable for areas with adverse geological conditions such as soft soil, expansive soil, and frozen soil. The arched structure transmits loads through axial pressure, so that stress is evenly distributed to the arch foot, reducing local stress concentration, greatly improving the stability and bearing capacity of the main roadbed 1, and preventing settlement of the roadbed structure.

[0022] The first arch structure 1021 and the second arch structure 1022 can be formed by cast-in-place process or by splicing precast concrete blocks.

[0023] A waterproof layer 104 is provided on the top side of the arched concrete reinforcement layer 102 to prevent water accumulation from corroding the soil and rock reinforcement layer 101 and the arched concrete reinforcement layer 102, thereby further improving the stability of the roadbed. The waterproof layer 104 can be a waterproof coating, waterproof membrane, etc.

[0024] A drainage ditch structure 4 is provided at the top of the second arch structure 1022, and a filter layer 5 is provided on the side of the drainage ditch structure 4 near the main roadbed 1. This allows water accumulated in the pavement layer 3 and water seeping from the top of the waterproof layer 104 to be quickly drained into the drainage ditch structure 4 through the filter layer 5, thereby reducing corrosion inside the roadbed fill layer 103 and further improving the stability of the main roadbed 1. The filter layer 5 can be a permeable concrete layer, a crushed stone layer, a quartz sand layer, etc.

[0025] Example 2

[0026] As shown in Figure 1, based on Embodiment 1, this embodiment provides a highway subgrade reinforcement structure, which further includes several grouting anchors 6 penetrating the subgrade fill layer 103, the arched concrete reinforcement layer 102, and the soil-rock reinforcement layer 101. The grouting anchors 6 improve the connection strength between the soil-rock reinforcement layer 101, the arched concrete reinforcement layer 102, and the subgrade fill layer 103, as well as the overall stability of the subgrade body 1. The grouting anchors are arranged in a fan shape relative to the arched concrete reinforcement layer 102. During construction, drilling is carried out after the drilling points are planned, ensuring the hole depth reaches the lower part of the soil-rock reinforcement layer 101. After inserting the grouting anchors 6 into the drilled holes, grouting is then performed.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to restrict the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present utility model and based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A roadbed reinforcement structure, comprising a roadbed body (1), wherein the bottom of the roadbed body (1) is a soil base layer (2) and the top is a pavement layer (3), characterized in that, The main body of the roadbed (1) includes, from bottom to top, a soil and rock reinforcement layer (101), a continuous arch concrete reinforcement layer (102), and a roadbed fill layer (103).

2. The highway embankment reinforcing structure according to claim 1, wherein The arch-shaped concrete reinforcement layer (102) includes a first arch structure (1021) set in the pavement layer (3) and a second arch structure (1022) symmetrically set on both sides of the first arch structure (1021). The first arch structure (1021) and the second arch structure (1022) are connected to form a mutually dependent arch structure.

3. The highway embankment reinforcement structure according to claim 2, wherein, The first arch structure (1021) and the second arch structure (1022) are formed by cast-in-place process or by splicing precast concrete blocks.

4. The highway embankment reinforcing structure according to claim 2, wherein A waterproof layer (104) is provided on the top side of the arch-shaped concrete reinforcement layer (102).

5. The highway subgrade reinforcement structure according to claim 4, characterized in that, A drainage ditch structure (4) is provided on the top of the second arch structure (1022), and a filter layer (5) is provided on the side of the drainage ditch structure (4) near the roadbed body (1).

6. A highway embankment reinforcing structure according to any one of claims 1 to 5, wherein It also includes several grouting anchors (6) that penetrate the subgrade fill layer (103), the arched concrete reinforcement layer (102), and the soil and rock reinforcement layer (101).

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