Reinforcing structure suitable for highway soft soil roadbed

Abstract

The utility model discloses a reinforcing structure suitable for a soft soil roadbed of an expressway, which comprises a water-absorbing concrete connecting plate which is of a plate body structure formed by water-absorbing concrete, a cement mortar base layer is arranged above the water-absorbing concrete connecting plate, and a cement fly ash gravel layer is arranged at the upper end of the cement mortar base layer. According to the reinforcing structure suitable for the soft soil roadbed of the expressway, the water absorption concrete connecting plates are matched with the prefabricated positioning piles and the limiting sleeves, insertion of the soft soil roadbed part is increased, and soft soil of the soft soil roadbed part is tamped; the contact area between the prefabricated positioning piles and tamped soil is increased under connection and cooperation of the water absorption concrete connecting plates, the contact area between the prefabricated positioning piles and the roadbed position is further increased, the contact area between the prefabricated positioning piles and the upper cement mortar base layer is matched, and the stability degree of the soft soil part is effectively increased; and inclination of the prefabricated positioning pile in the process of going deep into the soft soil is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of highway roadbeds, in particular to a reinforcement structure suitable for highway soft soil roadbeds. Background Art

[0002] Cities are places where industries and populations gather. Their car growth is much faster than that in rural areas, making them car gathering centers. In order to adapt to the development of industrialization and urbanization, the construction of highways mostly starts from urban ring roads, radial roads and busy traffic sections, and gradually becomes urban transportation with highways as the backbone. In the composition of highways, the roadbed is the most basic and also the part that has the greatest impact on the overall quality. When quality problems such as the roadbed occur, it will directly lead to a decline in the overall quality of the highway. The soft soil encountered in the construction of highway roadbed refers to fine-grained soil with high natural water content, large natural porosity, low shear strength and high compressibility. The existence of soft soil is likely to make the construction of highways more difficult.

[0003] In order to avoid settlement in soft soil roadbed, reinforcement structures are added to the soft soil roadbed to provide support and reinforcement for the roadbed as a whole. However, most of the existing highway soft soil roadbed reinforcement structures are supported by directly driving precast piles at equal distances into the soft soil. The precast piles are set up so that the roadbed has a small-area support effect. Due to the large natural voids in the soft soil roadbed, it is easy to tilt during the driving of the precast piles, thereby affecting the stability of the roadbed. Utility Model Content

[0004] The purpose of the utility model is to provide a reinforcement structure suitable for soft soil roadbeds of highways, so as to solve the problem proposed in the above background technology that the existing reinforcement structure of soft soil roadbeds of highways has a small-area support effect of the roadbed part through the arrangement of prefabricated piles, and due to the large natural gaps in the soft soil roadbed, it is easy to tilt during the driving process of prefabricated piles, thereby affecting the stability of the roadbed.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reinforcement structure suitable for a soft soil roadbed of a highway, comprising a water-absorbing concrete connecting plate, which is a plate structure composed of water-absorbing concrete, and a cement mortar base layer is arranged above the water-absorbing concrete connecting plate, and a cement fly ash gravel layer is arranged on the upper end of the cement mortar base layer, and the water-absorbing concrete connecting plate is used to cover the soft soil roadbed, and cooperates with the cement mortar base layer and the cement fly ash gravel layer to form a soft soil roadbed of the highway;

[0006] The upper end of the water-absorbing concrete connecting plate is equidistantly provided with side plates, and the upper end of the side plates is provided with a cement mortar base layer, the cement mortar base layer is provided with connecting steel bars in a staggered mesh shape, and limited sand piles are equidistantly provided at the top of the cement mortar base layer;

[0007] A modified asphalt base layer is laid on the upper end of the cement fly ash gravel layer, and a limiting sand pile is arranged at the bottom end of the cement fly ash gravel layer, and the limiting sand pile is arranged in parallel with the side upright plate, and the side upright plate is arranged in a vertical direction with the water-absorbing concrete connecting plate, and a reinforcement connection component is arranged inside the water-absorbing concrete connecting plate, which is used to support the water-absorbing concrete connecting plate and the cement mortar base layer, and is used to increase the support point connection surface, so as to reinforce the highway with soft soil roadbed.

[0008] The above technical solution is adopted to facilitate the reinforcement of the highway subgrade portion of the soft soil subgrade and further maintain the reinforcement of the soft soil subgrade portion.

[0009] Preferably, compacted soft soil is buried between the side panels, and the side panels are equidistantly arranged on the surface of the water-absorbing concrete connecting plate.

[0010] By adopting the above technical solution, the soft soil is compacted and filled between the side panels to further assist the water-absorbing concrete connecting plates for support.

[0011] Preferably, the reinforcement connection assembly comprises:

[0012] Pre-positioned positioning piles, which penetrate the interior of the water-absorbing concrete connecting plate, and the pre-positioned positioning piles are evenly arranged inside the water-absorbing concrete connecting plate;

[0013] A limiting sleeve, which is sleeved outside the pre-positioning pile and passes through the water-absorbing concrete connecting plate;

[0014] Positioning plate 1, which is installed on the surface of the pre-determined positioning pile;

[0015] A second positioning plate is slidably connected to the surface of the pre-determined positioning pile, and the second positioning plate is arranged below the first positioning plate;

[0016] A support frame, both ends of which are respectively connected to the side walls of the first and second positioning plates, and the support frame is arranged in an annular shape on the side walls of the first and second positioning plates;

[0017] A waterproof elastic ring is located inside the limiting sleeve and is equidistantly arranged in the vertical direction, and the waterproof elastic ring is sleeved on the outer wall of the pre-determined positioning pile;

[0018] The auxiliary rod is equidistantly arranged on the side wall of the waterproof elastic ring, and the auxiliary rod passes through the limiting sleeve.

[0019] By adopting the above technical solution, the reinforcement connection assembly is used to reinforce the soft soil roadbed part, which is convenient for the installation and use of the device.

[0020] Preferably, the pre-determined positioning pile and the limiting sleeve are arranged in the form of concentric circle sleeves, and an annular protrusion structure is arranged on the upper end of the pre-determined positioning pile.

[0021] By adopting the above technical solution, the pre-positioned positioning pile and the limiting sleeve are matched to form a joint installation process.

[0022] Preferably, the upper end of the second positioning plate is installed with the bottom end of the annular protruding structure of the pre-determined positioning pile, and the diameter of the second positioning plate is smaller than the diameter of the first positioning plate.

[0023] By adopting the above technical solution, as the positioning plate 2 and the pre-determined positioning pile annular protruding structure are installed, the top installation position is kept stable.

[0024] Preferably, the support frame is a strip structure made of metal material with a fan-shaped cross-section, and the support frame connects the positioning plate 1 and the positioning plate 2 to form a frame structure that is sleeved outside the pre-determined positioning pile.

[0025] By adopting the above technical solution, as the support frame is shrunk in length, the positioning plate 1 and the positioning plate 2 are squeezed to form an L-shaped structure to maintain the connection with the water-absorbing concrete connecting plate.

[0026] Preferably, the waterproof elastic ring and the auxiliary rod are arranged in a vertical direction, and one end of the auxiliary rod is arranged in a pointed cone shape.

[0027] By adopting the above technical solution, the waterproof elastic ring is arranged in coordination with the auxiliary rod, so that the auxiliary rod can be inserted into the soft soil roadbed to maintain stability.

[0028] Compared with the prior art, the beneficial effects of the utility model are: the reinforcement structure suitable for the soft soil roadbed of expressways:

[0029] 1. When in use, the absorbent concrete connecting plate is used in conjunction with the pre-positioned positioning pile and the limiting sleeve to increase the insertion of the soft soil roadbed part. By compacting the soft soil of the soft soil roadbed part, the pre-positioned positioning pile increases the contact area with the compacted soil under the connection and cooperation of the absorbent concrete connecting plate, further increases the contact area with the roadbed position, cooperates with the contact area between the side plate and the upper cement mortar base layer, effectively increases the stability of the soft soil part, and under the restriction of the absorbent concrete connecting plate, avoids the tilt of the pre-positioned positioning pile in the process of penetrating into the soft soil, thereby improving the stability of the reinforcement;

[0030] 2. The waterproof elastic ring set on the surface of the pre-positioning pile cooperates with the auxiliary rod to penetrate the outside of the limiting sleeve, and cooperates with the tip part of the bottom end of the pre-positioning pile to be inserted into the soft soil roadbed part of the expressway. The soft soil part is restricted and reinforced along with the compaction to avoid the inclination of the soft soil during the installation of the pre-positioning pile and the limiting sleeve. The cement mortar base layer connected to the top of the pre-positioning pile increases the stability of the connection, and cooperates with the limiting sand pile to further limit the installation of the cement fly ash gravel layer and make the reinforcement structure more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model in an overall connection state;

[0032] Figure 2 This is a schematic diagram of the overall split three-dimensional structure of the utility model;

[0033] Figure 3 It is a schematic diagram of the overall side-section three-dimensional structure of the utility model;

[0034] Figure 4 This is a schematic diagram of the three-dimensional structure of the cement mortar base layer and the pre-positioned positioning piles installed in the utility model;

[0035] Figure 5 This is a schematic diagram of the three-dimensional structure of the pre-positioning pile and the limiting sleeve installation of the utility model;

[0036] Figure 6 This is a schematic diagram of the three-dimensional structure of the pre-positioning pile and the limiting sleeve separated according to the utility model;

[0037] Figure 7 It is a schematic diagram of the side section stereoscopic structure of the pre-positioning pile and the limiting sleeve of the utility model.

[0038] In the figure: 1. absorbent concrete connecting plate; 2. side plate; 3. cement mortar base layer; 4. connecting steel bars; 5. limiting sand piles; 6. cement fly ash gravel layer; 7. modified asphalt base layer; 8. pre-positioning piles; 9. limiting sleeves; 10. positioning plate one; 11. positioning plate two; 12. support frame; 13. waterproof elastic ring; 14. auxiliary rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] See also Figure 1-7 The utility model provides a technical solution: a reinforcement structure suitable for soft soil roadbed of expressway, including a water-absorbing concrete connecting plate 1, a side plate 2, a cement mortar base layer 3, a connecting steel bar 4, a limiting sand pile 5, a cement fly ash gravel layer 6, a modified asphalt base layer 7, a pre-positioning pile 8, a limiting sleeve 9, a positioning plate 1 10, a positioning plate 2 11, a support frame 12, a waterproof elastic ring 13 and an auxiliary rod 14;

[0041] The absorbent concrete connecting plate 1 is a plate structure composed of absorbent concrete, and a cement mortar base layer 3 is arranged above the absorbent concrete connecting plate 1, and a cement fly ash gravel layer 6 is arranged on the upper end of the cement mortar base layer 3. The absorbent concrete connecting plate 1 is used to cover the soft soil roadbed and cooperate with the cement mortar base layer 3 and the cement fly ash gravel layer 6 to form a highway soft soil roadbed;

[0042] The upper end of the water-absorbing concrete connecting plate 1 is equidistantly provided with side plates 2, and the upper end of the side plates 2 is provided with a cement mortar base layer 3, the cement mortar base layer 3 is provided with connecting steel bars 4 in a staggered mesh shape, and the top of the cement mortar base layer 3 is equidistantly provided with limited sand piles 5, and compacted soft soil is buried between the side plates 2, and the side plates 2 are equidistantly arranged on the surface of the water-absorbing concrete connecting plate 1;

[0043] A modified asphalt base layer 7 is laid on the upper end of a cement fly ash gravel layer 6, a limited sand pile 5 is arranged at the bottom end of the cement fly ash gravel layer 6, and the limited sand pile 5 is arranged in parallel with the side plate 2, the side plate 2 is arranged in a vertical direction with the water-absorbing concrete connecting plate 1, and a reinforcement connection component is arranged inside the water-absorbing concrete connecting plate 1, which is used to support the water-absorbing concrete connecting plate 1 and the cement mortar base layer 3, and is used to increase the support point connection surface, so as to reinforce the highway with soft soil roadbed;

[0044] In conjunction with the accompanying drawings Figure 1-7 As shown, during the production and construction of the expressway, the soft soil at the roadbed erection position is compacted, and then cement, sand, gravel, sodium polyacrylate and other materials are mixed to form absorbent concrete to form a plate-like structure. The side plates 2 arranged at the upper end of the absorbent concrete connecting plate 1 are used to separate the compacted soft soil filled at the upper end of the absorbent concrete connecting plate 1. With the erection of the side plates 2, it is convenient to install drainage pipes inside to prevent the water contained in the compacted soft soil arranged above and below the absorbent concrete connecting plate 1 from being discharged to the outside. The cement mortar base layer 3 arranged above the absorbent concrete connecting plate 1 is laid at the upper ends of the absorbent concrete connecting plate 1 and the side plates 2. Before laying the cement mortar base layer 3, the connecting steel bars 4 are quickly and evenly laid in a staggered mesh to be connected to the surrounding roadbed structure. With the pouring of the cement mortar base layer 3 to form the layer structure, the limiting sand piles 5 equidistantly installed at the upper end of the cement mortar base layer 3 are prefabricated sand piles, which are used to cooperate with the laying of the cement fly ash gravel layer 6, as shown in FIG. Figure 1As shown, finally, a modified asphalt base layer 7 is further laid on the upper layer of the cement fly ash gravel layer 6 to form the base structure of the roadbed, so as to improve the bearing effect of the soft soil base. During the construction process, the settlement data after the construction is regularly collected to adjust the construction practice of the cement mortar base layer 3, the connecting steel bar 4, the limiting sand pile 5, the cement fly ash gravel layer 6 and the modified asphalt base layer 7. Subsequently, the corresponding highway construction materials are further laid on the upper layer of the modified asphalt base layer 7 according to the terrain and regional characteristics, so as to facilitate the construction of the highway.

[0045] The reinforced connection components include:

[0046] Pre-positioning piles 8, which penetrate the interior of the water-absorbing concrete connecting plate 1, and the pre-positioning piles 8 are evenly arranged inside the water-absorbing concrete connecting plate 1, the pre-positioning piles 8 and the limiting sleeves 9 are arranged in a concentric circle sleeve, and the upper end of the pre-positioning piles 8 is provided with an annular protrusion structure;

[0047] A limiting sleeve 9 is sleeved on the outside of the pre-positioning pile 8, and the limiting sleeve 9 passes through the water-absorbing concrete connecting plate 1;

[0048] A positioning plate 10, which is installed on the surface of the pre-positioned positioning pile 8;

[0049] The second positioning plate 11 is slidably connected to the surface of the pre-positioning pile 8, and the second positioning plate 11 is arranged below the first positioning plate 10, the upper end of the second positioning plate 11 is installed with the bottom end of the annular protrusion structure of the pre-positioning pile 8, and the diameter of the second positioning plate 11 is smaller than the diameter of the first positioning plate 10;

[0050] The support frame 12, whose two ends are respectively connected to the side walls of the positioning plate 10 and the positioning plate 2 11, and the support frame 12 is arranged in an annular shape on the side walls of the positioning plate 10 and the positioning plate 2 11, and the support frame 12 is a strip structure made of metal material according to a fan-shaped cross-section, and the support frame 12 connects the positioning plate 10 and the positioning plate 2 11 to form a frame structure sleeved on the outside of the pre-determined positioning pile 8;

[0051] The waterproof elastic ring 13 is located inside the limiting sleeve 9 and is equidistantly arranged in the vertical direction. The waterproof elastic ring 13 is sleeved on the outer wall of the pre-set positioning pile 8. The waterproof elastic ring 13 and the auxiliary rod 14 are arranged in a vertical direction, and one end of the auxiliary rod 14 is arranged in a pointed cone shape.

[0052] Auxiliary rods 14 are equidistantly arranged on the side wall of the waterproof elastic ring 13, and the auxiliary rods 14 penetrate the limiting sleeve 9;

[0053] In conjunction with the accompanying drawings Figure 1-7As shown, the water-absorbing concrete connecting plate 1 is placed in the compacted soft soil, and as the limiting sleeve 9 is evenly inserted into the water-absorbing concrete connecting plate 1, the auxiliary rod 14 located inside the limiting sleeve 9 is simultaneously sent into the compacted soft soil. After the pre-positioning pile 8 is inserted into the limiting sleeve 9, as shown in FIG. Figure 5 and Figure 7 As shown, the waterproof elastic ring 13 is stretched open by the pre-positioning pile 8, wherein the waterproof elastic ring 13 pushes the auxiliary rod 14 on the side to penetrate the side wall of the limiting sleeve 9 and enter the compacted soft soil, thereby increasing the stability of the pre-positioning pile 8. At the same time, the top of the pre-positioning pile 8 contacts the cement mortar base layer 3. As the cement mortar base layer 3 solidifies and remains fixed, the annular protrusion structure located on the pre-positioning pile 8 contacts the positioning plate 11. As the pre-positioning pile 8 is inserted into the limiting sleeve 9, the top of the limiting sleeve 9 pushes The positioning plate 10 sliding on the surface of the pre-positioning pile 8 is sent up, so that the positioning plate 10 and the positioning plate 2 11 are close to each other, and the support frame 12 between the positioning plate 10 and the positioning plate 2 11 is contracted and squeezed to be folded into an L-shaped structure, wherein the positioning plate 2 11 is rotatably connected with the support frame 12 to adjust the angle, and the L-shaped structure of the support frame 12 is in contact with the absorbent concrete connecting plate 1 for support, so as to maintain the stability of the cement mortar base layer 3 at the upper end of the pre-positioning pile 8, and further assist in the reinforcement of the soft soil roadbed.

[0054] Working principle: When using the reinforcement structure suitable for the soft soil roadbed of the expressway, the stability of the soft soil is increased by adding the absorbent concrete connecting plate 1 during the soft soil compaction process. With the side plates 2 equidistantly arranged on the inner surface of the absorbent concrete connecting plate 1, the soft soil is separated and processed. The pre-positioned positioning piles 8 and the limiting sleeves 9 are set through the absorbent concrete connecting plate 1, so that the limiting sleeves 9 penetrate into the soft soil compaction area. After the pre-positioned positioning piles 8 are inserted into the limiting sleeves 9, the waterproof elastic ring 13 inside the limiting sleeves 9 is opened by the positioning piles 8, and the auxiliary rods located on the outer wall of the waterproof elastic ring 13 are 14 penetrates the limiting sleeve 9 and is inserted into the compacted soft soil to increase the contact support surface. As the absorbent concrete connecting plate 1 maintains the stability of the installation of the pre-set positioning pile 8 and the limiting sleeve 9, the soft soil support area is increased. At the same time, as the top of the pre-set positioning pile 8 is poured and connected with the cement mortar base layer 3, the connecting steel bar 4 is coordinated to further stabilize the installation position of the cement mortar base layer 3 and the surrounding highway, providing reinforcement assistance for the whole. The limiting sand pile 5, cement fly ash gravel layer 6 and modified asphalt base layer 7 located on the upper layer of the cement mortar base layer 3 are arranged in sequence to form a reinforced roadbed structure, which increases the overall practicality.

[0055] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reinforcement structure suitable for soft soil roadbed of expressway, comprising: A water-absorbing concrete connecting plate (1) is a plate structure composed of water-absorbing concrete, a cement mortar base layer (3) is arranged above the water-absorbing concrete connecting plate (1), and a cement fly ash gravel layer (6) is arranged at the upper end of the cement mortar base layer (3), and the water-absorbing concrete connecting plate (1) is used to cover a soft soil roadbed and cooperate with the cement mortar base layer (3) and the cement fly ash gravel layer (6) to form a highway soft soil roadbed; The invention is characterized in that: the upper end of the water-absorbing concrete connecting plate (1) is provided with side plates (2) at equal intervals, and the upper end of the side plates (2) is provided with a cement mortar base layer (3), the cement mortar base layer (3) is provided with connecting steel bars (4) in a staggered mesh shape inside, and the top of the cement mortar base layer (3) is provided with limited sand piles (5) at equal intervals; A modified asphalt base layer (7) is laid on the upper end of the cement fly ash gravel layer (6); a limited sand pile (5) is arranged at the bottom end of the cement fly ash gravel layer (6); the limited sand pile (5) is arranged in parallel with the side plate (2); the side plate (2) is arranged in a vertical direction with the water-absorbing concrete connecting plate (1); and a reinforcement connection component is arranged inside the water-absorbing concrete connecting plate (1) for supporting the water-absorbing concrete connecting plate (1) and the cement mortar base layer (3) and for increasing the support point connection surface, thereby reinforcing the highway with a soft soil roadbed.

2. A reinforcement structure suitable for soft soil roadbed of expressway according to claim 1, characterized in that: Compacted soft soil is buried between the side upright plates (2), and the side upright plates (2) are arranged at equal distances on the surface of the water-absorbing concrete connecting plate (1).

3. A reinforcement structure suitable for soft soil roadbed of expressway according to claim 1, characterized in that: The reinforcement connection assembly comprises: Pre-positioned positioning piles (8), which penetrate the interior of the water-absorbing concrete connecting plate (1), and the pre-positioned positioning piles (8) are evenly arranged inside the water-absorbing concrete connecting plate (1); A limiting sleeve (9), which is sleeved on the outside of the pre-positioning pile (8), and the limiting sleeve (9) passes through the water-absorbing concrete connecting plate (1); A positioning plate (10) mounted on the surface of the pre-positioned positioning pile (8); A second positioning plate (11) is slidably connected to the surface of the pre-positioning pile (8), and the second positioning plate (11) is arranged below the first positioning plate (10); A support frame (12), the two ends of which are respectively connected to the side walls of the first positioning plate (10) and the second positioning plate (11), and the support frame (12) is arranged in an annular shape on the side walls of the first positioning plate (10) and the second positioning plate (11); A waterproof elastic ring (13) is located inside the limiting sleeve (9) and is arranged equidistantly in the vertical direction, and the waterproof elastic ring (13) is sleeved on the outer wall surface of the pre-determined positioning pile (8); An auxiliary rod (14) is equidistantly arranged on the side wall of the waterproof elastic ring (13), and the auxiliary rod (14) penetrates the limiting sleeve (9).

4. A reinforcement structure suitable for soft soil roadbed of expressway according to claim 3, characterized in that: The pre-positioning pile (8) and the limiting sleeve (9) are arranged in the form of concentric sleeves, and an annular protrusion structure is arranged on the upper end of the pre-positioning pile (8).

5. The reinforcement structure for soft soil roadbed of expressway according to claim 3, characterized in that: The upper end of the second positioning plate (11) is mounted on the bottom end of the annular protruding structure of the pre-positioning pile (8), and the diameter of the second positioning plate (11) is smaller than the diameter of the first positioning plate (10).

6. The reinforcement structure for soft soil roadbed of expressway according to claim 3, characterized in that: The support frame (12) is a strip structure made of metal material with a fan-shaped cross section, and the support frame (12) is connected to the first positioning plate (10) and the second positioning plate (11) to form a frame structure that is sleeved outside the pre-positioned positioning pile (8).

7. The reinforcement structure for soft soil roadbed of expressway according to claim 3, characterized in that: The waterproof elastic ring (13) and the auxiliary rod (14) are arranged in a vertical direction, and one end of the auxiliary rod (14) is arranged in a pointed cone shape.

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