Roadbed filling structure
By setting concrete baffles at both ends of the box culvert and connecting them with retaining walls, and using foamed concrete filler and angle steel bars for connection, the problems of material waste and structural instability caused by openings in the retaining walls were solved, and efficient and safe roadbed filling was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG INST OF COMM CO LTD
- Filing Date
- 2026-02-09
- Publication Date
- 2026-04-28
AI Technical Summary
In roadbed engineering, opening holes in retaining walls to allow box culverts to pass through can lead to problems such as material waste, construction difficulties, poor structural stability, and safety hazards.
The box culvert is constructed by installing concrete baffles at both ends that connect seamlessly with retaining walls to form a filling space. Low-density foamed concrete is used as the roadbed filler, which is connected with angle steel and reinforcing bars to avoid openings and enhance the continuity and stability of the structure.
It saves retaining wall materials, reduces construction difficulty, improves structural stability and safety, reduces safety hazards, and enhances the overall bearing capacity and long-term safety of roadbed filling.
Smart Images
Figure CN224173139U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of roadbed filling technology, and in particular to a roadbed filling structure. Background Technology
[0002] In roadbed engineering projects that require the simultaneous installation of retaining walls and box culverts, the current conventional practice is to pre-leave holes in the retaining wall or drill holes after the wall is formed, so that the box culvert can pass through the holes to pass through the retaining wall.
[0003] However, this method of drilling holes in the retaining wall has significant drawbacks: First, even at the location where the box culvert is to be laid, the retaining wall with the hole still needs to be retained, resulting in unnecessary waste of retaining wall material; at the same time, the construction operation requires high precision in pre-reserving hole positions or initiating the formation of concrete walls later, which is difficult and difficult to control in terms of quality.
[0004] Secondly, the openings in the wall severely damage the integrity and continuity of the retaining wall structure, weakening its strength and structural stability. Especially when the box culvert is large, the opening size increases accordingly, which is particularly detrimental to the stability of the retaining wall and poses a serious safety hazard. Once the retaining wall fails partially or becomes unstable as a whole, it can easily lead to major safety accidents such as the collapse of the roadbed fill. Utility Model Content
[0005] Therefore, it is necessary to address the problems of low construction efficiency and low structural safety of the current retaining wall opening method, and to provide a more economical and reasonable roadbed filling structure that can avoid opening, improve construction efficiency, enhance structural safety and stability.
[0006] This application provides a roadbed filling structure, including a box culvert, a retaining wall, a concrete slab, and roadbed fill material, wherein the first direction is the length direction of the box culvert;
[0007] The box culvert has openings at both ends along the first direction. Each opening is provided with a retaining wall on both sides and a concrete baffle on the top. The side of the retaining wall is connected to the side of the box culvert. The bottom of the concrete baffle is connected to the top surface of the box culvert and the side is connected to the retaining wall on the same side along the first direction, so as to form a filling space for accommodating roadbed fill between the retaining wall and the concrete baffle on both sides along the first direction.
[0008] The roadbed filler includes a first roadbed filler and a second roadbed filler. The density of the second roadbed filler is less than that of the first roadbed filler. The projection of the first roadbed filler along the first direction corresponds to the retaining wall, and the projection of the second roadbed filler along the first direction corresponds to the concrete retaining plate.
[0009] In one embodiment, the first roadbed filler is a soil-rock mixture, and the second roadbed filler is foamed concrete.
[0010] In one embodiment, the end face of the box culvert along its length, the outer surface of the retaining wall on the same side, and the outer surface of the concrete baffle on the same side are flush with each other.
[0011] In one embodiment, the top of the box culvert is fixed with multiple angle steels at intervals.
[0012] In one embodiment, a set of angle steel groups is respectively provided on both sides of the top of the box culvert along the first direction. Each set of angle steel groups includes multiple angle steels arranged at equal intervals along a second direction, which is perpendicular to the first direction and the vertical direction.
[0013] In one embodiment, the spacing between two adjacent angle steels along the second direction is 50 cm.
[0014] In one embodiment, a reinforcing bar is fixed between the angle steel and the concrete baffle located on the same side along the first direction.
[0015] In one embodiment, a reinforcing bar tie is pre-embedded and fixed on the inner surface of the concrete baffle along the first direction, and the two ends of the reinforcing bar are respectively fixed to the angle steel and the reinforcing bar tie.
[0016] In one embodiment, each of the angle steel bars is fixed vertically between itself and the concrete baffle with a plurality of the steel bars.
[0017] In one embodiment, the spacing between two adjacent steel bars in the vertical direction is 50 cm.
[0018] The aforementioned roadbed filling structure, by installing concrete baffles at the ends of the box culverts and connecting them seamlessly with the retaining walls, creates a filling space between the retaining walls and the concrete baffles on both sides. This avoids the need for openings in the retaining walls as in traditional solutions, saving retaining wall materials, reducing construction difficulty and quality control risks, maintaining the integrity and continuity of the retaining wall structure, enhancing the strength and stability of the wall body, and eliminating safety hazards such as local failures or roadbed fill collapses caused by openings. In addition, the projection of the lower-density second roadbed fill material corresponds to the concrete baffle, significantly reducing the lateral pressure of the roadbed fill material on the concrete baffle within the filling space. Thus, this application significantly improves the stability, safety, and structural reliability of the roadbed compared to conventional perforated retaining wall solutions. Attached Figure Description
[0019] Figure 1 This is a top view of one embodiment of the roadbed filling structure of this application;
[0020] Figure 2 for Figure 1 A cross-sectional view of part of the structure along the AA direction;
[0021] Figure 3 for Figure 2 Enlarged view of point B in the middle;
[0022] Figure 4 for Figure 3 Enlarged view of point C in the middle;
[0023] Figure 5 for Figure 1 A three-dimensional schematic diagram of one side of the central axis along the first direction behind the hidden roadbed fill.
[0024] Attached reference numerals: 10, box culvert; 11, opening; 20, retaining wall; 30, concrete retaining wall; 31, steel reinforcement tie; 41, first roadbed fill material; 42, second roadbed fill material; 50, angle steel; 60, steel reinforcement. Detailed Implementation
[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0031] Please combine Figure 1 , Figure 2 as well as Figure 5 As shown, this application provides a roadbed filling structure, including a box culvert 10, retaining walls 20, concrete baffles 30, and roadbed filling material. The first direction is the length direction of the box culvert 10. The box culvert 10 has openings 11 at both ends along the first direction. Each opening 11 has a retaining wall 20 on both sides and a concrete baffle 30 on the top. The side of the retaining wall 20 is connected to the side of the box culvert 10. The bottom of the concrete baffle 30 is connected to the top surface of the box culvert 10, and the side is connected to the retaining wall 20 on the same side along the first direction, so as to form a filling space for accommodating the roadbed filling material between the retaining walls 20 and the concrete baffles 30 on both sides along the first direction. The roadbed filling material includes a first roadbed filling material 41 and a second roadbed filling material 42. The density of the second roadbed filling material 42 is less than that of the first roadbed filling material 41. The projection of the first roadbed filling material 41 along the first direction corresponds to the retaining wall 20, and the projection of the second roadbed filling material 42 along the first direction corresponds to the concrete baffle 30.
[0032] In this application, by setting a concrete baffle 30 at the end of the box culvert 10 and connecting it to the retaining wall 20, a filling space is formed between the retaining wall 20 and the concrete baffle 30 on both sides. This avoids the need to open holes in the retaining wall in the traditional solution. It not only saves the material of the retaining wall 20, reduces the construction difficulty and quality control risks, but also maintains the integrity and continuity of the retaining wall 20 structure, enhances the strength and stability of the wall body, and eliminates safety hazards such as local failure or roadbed fill collapse caused by opening holes.
[0033] Furthermore, the projection of the lower-density second subgrade filler 42 corresponds to the concrete baffle 30, which significantly reduces the lateral pressure of the subgrade filler on the concrete baffle 30 within the filling space, thereby making the stability, safety and structural reliability of the subgrade greatly improved compared with conventional perforated retaining wall schemes.
[0034] Please combine Figure 1 as well as Figure 2 As shown, in some embodiments, the first roadbed filler 41 is a soil-rock mixture, and the second roadbed filler 42 is foamed concrete.
[0035] By specifying that the first roadbed fill material 41 is a soil-rock mixture and the second roadbed fill material 42 is foamed concrete, the roadbed fill material structure can be optimized.
[0036] Specifically, the soil-rock mixture has high density and stable strength, so that its projection along the first direction corresponds to the retaining wall 20. The retaining wall 20 can provide reliable support for the soil-rock mixture, ensuring the overall bearing capacity and stability of the filling structure. At the same time, the second roadbed fill 42 uses low-density foamed concrete, and its projection corresponds to the concrete baffle 30, which effectively reduces the lateral pressure of the roadbed fill on the concrete baffle 30 in the filling space and avoids the risk of high-strength fill extrusion damage to the slab in the traditional scheme.
[0037] In addition, foamed concrete itself does not require compaction (i.e., no external loading is required for compaction), which eliminates the additional pushing effect or impact load that may be generated during the compaction process. This protects the concrete baffle 30 from movement and deformation, greatly reduces construction difficulty and quality control risks, and improves the long-term safety and economy of the entire roadbed filling structure.
[0038] Please combine Figure 1 as well as Figure 2 As shown, in some embodiments, the end face of the box culvert 10 along the length direction, the outer surface of the retaining wall 20 on the same side, and the outer surface of the concrete baffle 30 on the same side are flush with each other.
[0039] By setting the end face of the box culvert 10 along its length, the outer surface of the retaining wall 20 on the same side, and the outer surface of the concrete baffle 30 on the same side to be flush with each other, the overall structure and the smoothness and aesthetics of the facade can be enhanced.
[0040] Specifically, the flush state between the end face of the box culvert 10, the outer surface of the retaining wall 20, and the outer surface of the concrete baffle 30 eliminates misalignment or discontinuity between the retaining wall 20 and the concrete baffle 30, ensuring a smooth transition and tight fit between these components at the connection, reducing structural gaps and the risk of stress concentration; this facilitates the uniform transfer of load between the box culvert 10, the retaining wall 20, and the concrete baffle 30, avoiding cracks or failures caused by local stress accumulation;
[0041] Meanwhile, this design simplifies the construction process, eliminates the need for additional adjustments or repairs, reduces the difficulty of quality control, and thus fully maintains the continuity and integrity of the retaining wall 20 structure, improving the overall stability and safety of the roadbed filling structure under harsh conditions.
[0042] Please combine Figure 2 as well as Figure 3 As shown, in some embodiments, multiple angle steels 50 are fixed at intervals on the top of the box culvert 10.
[0043] By fixing multiple angle steels 50 at intervals on the top of the box culvert 10, the stability of the concrete baffle 30 can be enhanced. Specifically, the multiple angle steels 50 are fixed at intervals on the top surface of the box culvert 10 to form distributed support points, providing anchoring points for the second roadbed fill material 42, thereby further reducing the lateral pressure of the second roadbed fill material 42 on the concrete baffle 30.
[0044] In some embodiments, a set of angle steel groups is respectively provided on both sides of the top of the box culvert 10 along the first direction. Each set of angle steel groups includes multiple angle steels 50 arranged at equal intervals along the second direction, which is perpendicular to the first direction and the vertical direction.
[0045] The two sets of angle steel assemblies set on both sides along the first direction can enhance the stability and uniform bearing capacity of the connection between the top of the box culvert 10 and the concrete baffle 30, avoid deformation or failure caused by local concentrated loads on the top of the box culvert 10, and further reduce the lateral pressure borne by the concrete baffle 30.
[0046] Specifically, by symmetrically arranging angle steels 50 on both sides of the box culvert 10 and distributing them at equal intervals along the second direction, the structure can disperse the lateral and vertical loads transmitted by the second roadbed fill 42, promote the uniform transmission of loads to the concrete retaining wall 30 and retaining wall 20, thereby improving the overall stiffness and reliability of the entire filling structure and reducing construction errors and quality control risks.
[0047] In some embodiments, the spacing between two adjacent angle steels 50 along the second direction is 50cm. Of course, in other embodiments, the spacing between two adjacent angle steels 50 can also be adjusted according to the actual situation, and will not be listed in detail here.
[0048] Furthermore, angle steel 50 is inserted into the top of box culvert 10, and the length of the inserted part is 50cm.
[0049] Please combine Figure 3 as well as Figure 4 As shown, in some embodiments, a reinforcing bar 60 is fixed between the angle steel 50 and the concrete baffle 30 located on the same side along the first direction. This can strengthen the integrated connection between components, improve the interface strength and structural resistance to deformation, and eliminate the risk of relative displacement caused by temperature difference and load changes.
[0050] Specifically, the steel bar 60 serves as a rigid connector, forming a reinforced anchor between the concrete baffle 30 and the angle steel 50. On the one hand, it disperses and transfers the load on the top of the box culvert 10 (such as the pressure from the second subgrade fill 42) to the concrete baffle 30, enhancing the overall load-bearing mechanism of the filling space, thereby improving the structural durability and safety redundancy, and preventing uneven settlement or stability problems caused by the slippage of the subgrade fill. On the other hand, it disperses and transfers the lateral pressure on the concrete baffle 30 to the angle steel 50, thereby further strengthening the stability of the concrete baffle 30.
[0051] Please refer to Figure 4 As shown, in some embodiments, a steel bar tie 31 is pre-embedded and fixed on the inner surface of the concrete baffle 30 along the first direction. The two ends of the steel bar 60 are respectively fixed to the angle steel 50 and the steel bar tie 31. The pre-embedded steel bar tie 31 is precisely positioned during the concrete baffle 30 pouring stage, avoiding structural damage caused by later drilling.
[0052] Please combine Figure 3 as well as Figure 4 As shown, in some embodiments, each angle steel 50 is fixed with multiple steel bars 60 in the vertical direction between it and the concrete baffle 30.
[0053] By arranging multiple parallel steel bars 60 in layers in the vertical direction, a distributed load transfer network is formed. On the one hand, this disperses the concentrated stress on the angle steel 50 (especially the backfill load on the top of the box culvert 10 and the dynamic load of vehicles). On the other hand, by increasing the number of anchoring points, the shear strength between the concrete baffle 30 and the angle steel 50 is greatly improved. This multi-level anchoring structure can significantly suppress the risk of local deformation of the concrete baffle 30 and ensure that the lateral force of the less dense second subgrade fill 42 on the top is evenly dissipated to the overall structure, so as to achieve the deformation coordination and stability of the subgrade filling structure of this application under long-term service.
[0054] In some embodiments, the spacing between two adjacent steel bars 60 in the vertical direction is 50 cm. Of course, in other embodiments, the spacing between two adjacent steel bars 60 can also be adjusted according to the actual situation, and these will not be listed here.
[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0056] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A roadbed filling structure, characterized in that, It includes a box culvert (10), a retaining wall (20), a concrete baffle (30), and roadbed fill material, wherein the first direction is the length direction of the box culvert (10); The box culvert (10) has openings (11) at both ends along the first direction. Each opening (11) is provided with a retaining wall (20) on both sides and a concrete baffle (30) on the top. The side of the retaining wall (20) is connected to the side of the box culvert (10). The bottom of the concrete baffle (30) is connected to the top surface of the box culvert (10) and the side is connected to the retaining wall (20) on the same side along the first direction, so as to form a filling space for accommodating roadbed fill between the retaining wall (20) and the concrete baffle (30) on both sides along the first direction. The roadbed filler includes a first roadbed filler (41) and a second roadbed filler (42). The density of the second roadbed filler (42) is less than that of the first roadbed filler (41). The projection of the first roadbed filler (41) along the first direction corresponds to the retaining wall (20), and the projection of the second roadbed filler (42) along the first direction corresponds to the concrete baffle (30).
2. The roadbed filling structure according to claim 1, characterized in that, The first roadbed filler (41) is a soil-rock mixture, and the second roadbed filler (42) is foamed concrete.
3. The roadbed filling structure according to claim 1, characterized in that, The end face of the box culvert (10) along its length, the outer surface of the retaining wall (20) on the same side, and the outer surface of the concrete baffle (30) on the same side are flush with each other.
4. The roadbed filling structure according to claim 1, characterized in that, The top of the box culvert (10) is fixed with multiple angle steels (50) at intervals.
5. The roadbed filling structure according to claim 4, characterized in that, The top of the box culvert (10) is provided with a set of angle steel groups on both sides along the first direction. Each set of angle steel groups includes multiple angle steels (50) arranged at equal intervals along the second direction, which is perpendicular to the first direction and the vertical direction.
6. The roadbed filling structure according to claim 5, characterized in that, The distance between two adjacent angle steels (50) along the second direction is 50cm.
7. The roadbed filling structure according to claim 5, characterized in that, A reinforcing bar (60) is fixed between the angle steel (50) and the concrete baffle (30) located on the same side along the first direction.
8. The roadbed filling structure according to claim 7, characterized in that, The concrete baffle (30) has a steel bar tie (31) pre-embedded and fixed on the inner surface along the first direction. The two ends of the steel bar (60) are respectively fixed to the angle steel (50) and the steel bar tie (31).
9. The roadbed filling structure according to claim 7, characterized in that, Each of the angle steel (50) and the concrete baffle (30) is fixed with a plurality of steel bars (60) in the vertical direction.
10. The roadbed filling structure according to claim 8, characterized in that, The spacing between two adjacent steel bars (60) in the vertical direction is 50cm.