Roadbed widening spliced roadbed structure

Abstract

The utility model discloses a roadbed widening and splicing structure, which belongs to the technical field of highway engineering and comprises a widening highway arranged on at least one side of an original highway, the widening highway is composed of an L-shaped prefabricated cement supporting block and a roadbed connecting column, and a vertical reinforcing supporting column used for being inserted into the ground is arranged at the bottom of the L-shaped prefabricated cement supporting block; the inner side face of the L-shaped prefabricated cement supporting block faces the original road, and a plain soil cushion layer, a gravel cement stabilizing layer and an asphalt concrete layer which are the same as the roadbed of the original road and correspond to the roadbed are sequentially arranged in the L-shaped prefabricated cement supporting block from bottom to top; and the roadbed connecting column penetrates from the outer side of the vertical wall of the L-shaped prefabricated cement supporting block and is connected into the roadbed of the original road. The roadbed widening and splicing structure has the comprehensive advantages of strengthening the connection between the new roadbed and the old roadbed, enhancing the transverse fixity, having excellent waterproof performance and the like.

Description

Technical Field

[0001] This utility model belongs to the field of highway engineering technology and provides a roadbed widening and splicing roadbed structure. Background Technology

[0002] Roadbed widening and splicing structure refers to an engineering technique that increases the width of an existing roadbed to meet traffic demands. This structure is mainly used to solve the problem of roadbed expansion due to increased traffic volume, road widening and reconstruction, etc. When dealing with the problem of widening highways on slopes, the existing roadbed widening and splicing structure usually involves directly filling soil on the slope to reduce the height difference to construct the spliced ​​roadbed.

[0003] Based on the above, when widening highways on slopes, the existing method for widening and splicing roadbeds typically involves directly filling soil to raise the foundation on both sides of the highway to construct the spliced ​​roadbed. However, this method has many drawbacks. First, direct soil filling may result in an unstable bond between the old and new roadbeds, making them prone to slippage and uneven settlement under vehicle loads and natural factors, leading to cracks and faults, affecting the road's service life and driving safety. Second, the soil filling method places high demands on the bearing capacity of the foundation; improper foundation treatment can easily lead to roadbed instability or even collapse. Furthermore, existing methods lack effective waterproofing measures, allowing rainwater to easily penetrate the roadbed, causing softening and damage, further exacerbating its instability. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a roadbed widening and splicing roadbed structure to solve the problem that when the existing roadbed widening and splicing roadbed structure construction method encounters a large slope angle on both sides of the road, the spliced ​​new road is prone to slippage with the old road, resulting in cracks at the connection.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a roadbed widening and splicing structure, including a widened road installed on at least one side of the original road. The widened road consists of L-shaped precast cement support blocks and roadbed connecting columns. The L-shaped precast cement support blocks effectively support the widened road and form a good connection with the original roadbed. Vertical reinforcing support columns are provided at the bottom for insertion into the ground to ensure stability and load-bearing capacity on the ground, preventing displacement or tilting due to load or natural factors. The inner surface of the L-shaped precast cement support blocks faces the original road, and from bottom to top, it contains a subgrade layer, a crushed stone cement stabilization layer, and an asphalt concrete layer, all identical to and corresponding to the original roadbed. This effectively transfers the load of the original road and enhances the overall stability of the widened road. The roadbed connecting columns penetrate from the outside of the vertical wall of the L-shaped precast cement support blocks and connect to the original roadbed, forming a stable connection structure and effectively enhancing the bonding force between the old and new roadbeds, reducing the risk of slippage and cracking. In this way, the use of prefabricated components can significantly improve construction efficiency, reduce the complexity and duration of on-site construction, and allow for better quality control of prefabricated components. Furthermore, the design of L-shaped prefabricated cement support blocks and vertically reinforced support columns enhances the stability of the entire roadbed structure, effectively resisting lateral earth pressure, especially on slopes and side slopes.

[0007] Optionally, the vertical reinforcing support columns are tapered at the free end facing away from the L-shaped precast concrete support block, and at least two are set on the outer side of the bottom end of the L-shaped precast concrete support block. In this way, the design of multiple support columns can effectively distribute the load and improve the overall bearing capacity, especially in the case of uneven settlement or large changes in external load, effectively preventing the deformation and damage of the roadbed.

[0008] Optionally, a geogrid is installed at the bottom of the L-shaped precast cement support block. Geogrid is a high-strength and durable synthetic material that effectively enhances soil stability during subgrade construction. Placing the geogrid at the bottom of the L-shaped precast cement support block helps distribute the load applied to the subgrade, reduces localized stress concentration, and improves the overall structural stability.

[0009] Optionally, the top outer side of the vertical wall of the L-shaped precast concrete support block is provided with a drainage outer channel that slopes downwards along its length. This downward slope allows water to drain smoothly, reducing damage to the roadbed. The top inner side of the vertical wall of the L-shaped precast concrete support block is provided with a drainage inner channel that communicates with the drainage outer channel and is horizontally arranged along its length. The drainage inner channel guides water outwards, ensuring drainage of the internal structure. The design of the inner and outer channels forms an effective drainage system that can quickly remove accumulated water, improving the stability of the roadbed. A waterproof layer is installed between the crushed stone cement stabilized layer and the asphalt concrete layer, located below the drainage inner channel. The waterproof layer effectively prevents water from penetrating into the roadbed, protecting the roadbed structure from moisture damage. Furthermore, the waterproof layer extends the service life of the roadbed and reduces softening and damage caused by moisture.

[0010] Optionally, the roadbed connecting post consists of a pole, transverse reinforcing barbs, and a roadbed connecting spiral band. The front half of the pole, closest to the existing road, features a roadbed connecting spiral band arranged axially along the pole. This spiral band design allows the connecting post to better embed itself into the soil when inserted into the existing roadbed, providing stronger pull-out resistance and anti-slip capability. The rear half of the pole, away from the existing road, features multiple sets of transverse reinforcing barbs arranged radially around the pole. The barbs increase the gripping force between the pole and the soil, enabling the roadbed connecting post to better resist external loads and natural factors after construction, thus improving the overall structural stability. In this way, the combination of the spiral band and transverse reinforcing barbs strengthens the connection between the roadbed connecting post and the old and new roadbeds, reducing the risk of slippage and cracking.

[0011] Optionally, the outer end of the roadbed connecting post has a cross-shaped groove structure. This facilitates the operation of the roadbed connecting post by the equipment, allowing it to be smoothly inserted into the existing roadbed.

[0012] Optionally, the subgrade connecting posts can be placed within the subgrade cushion layer. The subgrade cushion layer, as the foundation layer of the subgrade, provides a uniform bearing surface, helping to distribute the loads applied to the subgrade. Placing the connecting posts within the subgrade cushion layer utilizes the soil properties of the cushion layer to improve the stability and pull-out resistance of the connecting posts.

[0013] The above-mentioned scheme achieves several key improvements. First, by combining vertically reinforced support columns and roadbed connecting columns, the L-shaped precast cement support blocks are firmly fixed to the existing highway. This design not only initially positions and reinforces the L-shaped precast cement support blocks but also, through the rotation of the spiral belt, allows the roadbed connecting columns to penetrate deep into the subgrade, effectively preventing slippage and separation between the old and new roadbeds and significantly improving overall stability. Second, the barbed structure of the transversely reinforced sections plays a crucial role in widening the highway. When the widened highway is subjected to pressure, the barbed structure effectively prevents displacement of the widened portion, ensuring the stability of the connection between the old and new roadbeds, reducing stress-induced fractures, and improving the overall strength and durability of the roadbed. Finally, the waterproof layer effectively prevents rainwater from penetrating into the roadbed, protecting the roadbed structure from moisture erosion. Simultaneously, by creating drainage channels at the connection between the asphalt concrete layer and the L-shaped precast cement support blocks, accumulated water can be drained promptly, preventing prolonged rainwater retention and further improving the waterproofing effect of the roadbed, ensuring the safety and reliability of the widened and spliced ​​roadbed structure.

[0014] The beneficial effects of this utility model are as follows: The roadbed widening and splicing roadbed structure of this utility model, through the combined design of vertical reinforcing support columns and roadbed connecting columns, significantly strengthens the connection between the old and new roadbeds, effectively preventing slippage and separation, and improving overall stability. Furthermore, the barbed structure with lateral reinforcement enhances the lateral stability of the widened highway, preventing fault cracks caused by pressure, and improving the overall strength and durability of the roadbed. In addition, the design of the waterproof layer and drainage channels effectively prevents rainwater infiltration, protects the roadbed structure from water erosion, and promptly drains accumulated water, ensuring the safety and reliability of the roadbed.

[0015] 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

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram illustrating the application of the roadbed widening and splicing roadbed structure of this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of a single-sided structure in the diagram;

[0019] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure;

[0020] Figure 4 for Figure 3 Schematic diagram of the structure of the L-shaped precast cement support block;

[0021] Figure 5 for Figure 3 Schematic diagram of the structure of the middle subgrade connecting column;

[0022] Attached reference numerals: 1-Existing highway; 2-Wideened highway; 3-L-shaped precast cement support block; 4-Vertical reinforcement support column; 5-Outer drainage channel; 6-Inner drainage channel; 7-Subgrade connection column; 8-Pole; 9-Transverse reinforcement barb; 10-Subgrade connection spiral band; 11-Geogrid; 12-Soil cushion layer; 13-Cement-stabilized crushed stone layer; 14-Asphalt concrete layer; 15-Waterproof layer. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] like Figure 1-5 As shown, the roadbed widening and splicing roadbed structure mentioned in this utility model includes: a geogrid 11, which is fixedly laid on the ground; two L-shaped precast cement support blocks 3, which are L-shaped block structures, fixedly installed on the upper surface of the geogrid 11; two widened roads 2, which are laid on top of the L-shaped precast cement support blocks 3; the original road 1, which is laid on the upper surface of the geogrid 11 at its bottom and between the two widened roads 2; and a plain soil cushion layer 12, which is laid on top of the geogrid 11. A plain soil cushion layer 12 is laid between two L-shaped precast cement support blocks 3; a crushed stone cement stabilized layer 13 is laid on top of the plain soil cushion layer 12 and between the two L-shaped precast cement support blocks 3; an asphalt concrete layer 14 is set on the top layer of the widened highway 2 and the original highway 1 and is laid between the two L-shaped precast cement support blocks 3; and two roadbed connecting columns 7 are arranged with a cross-shaped groove structure at their outer ends. The two roadbed connecting columns 7 are fixedly connected between the plain soil cushion layers 12 of the widened highway 2 and the original highway 1 on both sides.

[0025] In this embodiment, the bottom of the L-shaped precast concrete support block 3 is provided with vertical reinforcing support columns 4. The vertical reinforcing support columns 4 are cylindrical structures with conical ends, and there are two of them. The two vertical reinforcing support columns 4 are fixedly installed at the front and rear ends of the outer side of the lower end face of the L-shaped precast concrete support block 3. During construction, the L-shaped precast concrete support block 3 is first connected to the ground through the vertical reinforcing support columns 4. Their function is to reinforce the L-shaped precast concrete support block 3 in the vertical direction, thus completing the initial positioning of the L-shaped precast concrete support block 3. The vertical reinforcing support columns 4 can be precast simultaneously with the L-shaped precast concrete support block 3.

[0026] In this embodiment, the roadbed connecting post 7 has a roadbed connecting spiral band 10 on its rod body 8. The roadbed connecting spiral band 10 is a spiral band structure and is fixedly installed on the inner half of the cylindrical surface of the roadbed connecting post 7. During construction, the roadbed connecting post 7 is rotated by the cross-shaped rotation of the outer end of the roadbed connecting post 7, which drives the roadbed connecting spiral band 10 to rotate. This causes the roadbed connecting post 7 to drill into the subgrade 12 of the widened highway 2 and fix the L-shaped precast cement support block 3 to the original highway 1. Its function is to fix the L-shaped precast cement support block 3 to the original highway 1, so that the L-shaped precast cement support block 3 has the functional prerequisite of becoming the roadbed of the widened highway 2.

[0027] In this embodiment, the rod body 8 of the roadbed connecting post 7 is also provided with transverse reinforcing barbs 9. The transverse reinforcing barbs 9 are barb-shaped structures with several pieces. The several transverse reinforcing barbs 9 are distributed on the outer half of the cylindrical surface of the roadbed connecting post 7. In use, after the plain soil cushion layer 12 is added to the widened highway 2, the barb structure of the transverse reinforcing barbs 9 makes the widened highway 2 more stable when subjected to pressure, thereby preventing the occurrence of fault cracks at the connection between the widened highway 2 and the original highway 1.

[0028] In this embodiment, the top of the vertical wall of the L-shaped precast cement support block 3 is provided with a drainage channel, including an outer drainage channel 5 and an inner drainage channel 6. The drainage channel is located inside the upper end of the L-shaped precast cement support block 3. A waterproof layer 15 is provided between the crushed stone cement stabilized layer 13 and the asphalt concrete layer 14. The waterproof layer 15 can prevent water from continuing to penetrate downwards and protect the roadbed structure from rainwater erosion. The waterproof layer 15 is laid below the drainage channel 4. In use, when water seeps into the asphalt concrete layer 14, the rainwater blocked above the waterproof layer 15 will accumulate at the asphalt concrete layer 14. By opening a drainage channel at the connection between the asphalt concrete layer 14 and the L-shaped precast cement support block 3, the accumulated rainwater can be effectively drained, making the waterproof function of the component more reliable.

[0029] The specific usage and function of this widened and spliced ​​roadbed structure are as follows:

[0030] In use, the L-shaped precast cement support block 3 is first connected to the ground by a vertically reinforcing support column 4. This serves to reinforce the L-shaped precast cement support block 3 vertically, thus completing the initial positioning of the L-shaped precast cement support block 3. Then, using installation equipment, the roadbed connecting column 7 is rotated via a cross-shaped rotation at its outer end, causing the roadbed connecting spiral belt 10 to rotate. This allows the roadbed connecting column 7 to penetrate into the subgrade 12 of the widened highway 2, fixing the L-shaped precast cement support block 3 to the existing highway 1. The function is to fix the L-shaped precast cement support block 3 to the existing highway 1, thus making the L-shaped precast cement support block 3 a prerequisite for the roadbed of the widened highway 2. After adding the plain soil cushion layer 12 to the widened highway 2, the barbed structure of the transverse reinforcement barbs 9 makes the widened highway 2 more stable under pressure, thereby preventing the occurrence of fault cracks at the connection between the widened highway 2 and the existing highway 1. On the plain soil cushion layer 12, a crushed stone cement stabilization layer 13, a waterproof layer 15, and an asphalt concrete layer 14 are sequentially set. When water seeps into the asphalt concrete layer 14, the waterproof layer 15 can prevent the water from continuing to seep downward, protecting the roadbed structure from rainwater erosion. The rainwater blocked above the waterproof layer 15 will accumulate at the asphalt concrete layer 14. By opening a drainage channel at the connection between the asphalt concrete layer 14 and the L-shaped precast cement support block 3, the accumulated rainwater can be effectively drained, making the waterproof function of the component more reliable.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A roadbed widening and splicing roadbed structure, characterized in that, The road includes a widened road (2) set on at least one side of the original road (1). The widened road (2) is composed of an L-shaped precast cement support block (3) and a roadbed connecting column (7). The bottom of the L-shaped precast cement support block (3) is provided with a vertical reinforcing support column (4) for inserting into the ground. The inner side of the L-shaped precast cement support block (3) is set towards the original road (1), and from bottom to top, it is provided with a plain soil cushion layer (12), a crushed stone cement stabilization layer (13), and an asphalt concrete layer (14) that are the same as the roadbed of the original road (1) and respectively. The roadbed connecting column (7) is inserted from the outside of the vertical wall of the L-shaped precast cement support block (3) and connected to the roadbed of the original road (1).

2. The roadbed widening and splicing roadbed structure according to claim 1, characterized in that, The vertical reinforcing support column (4) is set in a cone shape at the free end away from the L-shaped precast cement support block (3), and at least two are set on the outer side of the bottom end of the L-shaped precast cement support block (3).

3. The roadbed widening and splicing roadbed structure according to claim 1, characterized in that, The bottom of the L-shaped precast cement support block (3) is provided with a geogrid (11).

4. The roadbed widening and splicing roadbed structure according to claim 1, characterized in that, The L-shaped precast cement support block (3) has a drainage outer groove (5) arranged downwardly along its length on the outer side of the top of the vertical wall. The L-shaped precast cement support block (3) has a drainage inner groove (6) that communicates with the drainage outer groove (5) and is arranged horizontally along its length on the inner side of the top of the vertical wall. A waterproof layer (15) located below the drainage inner groove (6) is provided between the crushed stone cement stabilization layer (13) and the asphalt concrete layer (14).

5. The roadbed widening and splicing roadbed structure according to claim 1, characterized in that, The roadbed connecting post (7) is composed of a pole (8), transverse reinforcing barbs (9), and a roadbed connecting spiral band (10). The pole (8) has a roadbed connecting spiral band (10) arranged spirally along the axial direction of the pole (8) in the front half of the pole (8) close to the original road (1). The pole (8) has multiple sets of transverse reinforcing barbs (9) arranged radially around the pole (8) in the rear half of the pole (8) away from the original road (1).

6. The roadbed widening and splicing roadbed structure according to claim 5, characterized in that, The outer end of the roadbed connecting column (7) has a cross-shaped groove structure.

7. The roadbed widening and splicing roadbed structure according to claim 5, characterized in that, The roadbed connecting column (7) is located inside the plain soil cushion layer (12).

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