A settlement-resistant culvert reinforcing structure in soft soil subgrade
By using a load-bearing foundation that is smaller at the top and larger at the bottom, along with waterproof materials and a detachable filter structure, the problems of culvert settlement and blockage were solved, enabling stable operation and low-cost maintenance of the culvert.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY FIRST GRP SECOND ENG CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-09
AI Technical Summary
In areas with soft soil subgrade, culverts are prone to settlement and structural instability, and have high maintenance costs. Traditional methods are prone to instability when there is seepage under high flow rates, requiring frequent inspections and cleaning.
The culvert is constructed by combining a load-bearing foundation that is smaller at the top and larger at the bottom with waterproof materials. The main body of the culvert is placed on the load-bearing foundation, and a detachable filter structure is installed at the inlet. The load-bearing foundation is used to distribute pressure and improve waterproof performance, while the filter structure intercepts foreign objects to prevent settlement and blockage.
It effectively prevents culvert settlement, reduces the frequency of inspections and maintenance, reduces cleaning difficulty, significantly reduces maintenance costs, and ensures stable operation of culverts.
Smart Images
Figure CN224338120U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of culvert technology, and in particular to a culvert reinforcement structure for resisting settlement in soft soil subgrade. Background Technology
[0002] In areas with soft soil subgrades or relatively loose geological conditions, culverts may experience settlement, making it difficult for them to maintain stable positions over long periods. This can lead to structural problems such as cracking and tilting, and in severe cases, even collapse. Traditional culvert foundations use a sand and gravel cushion layer to reduce the impact of settlement through drainage. However, this layer is prone to instability under heavy infiltration, resulting in significant settlement and necessitating frequent inspections and maintenance. Furthermore, culverts are susceptible to blockage by foreign objects, requiring regular cleaning and dredging by professionals, thus increasing overall maintenance costs. Summary of the Invention
[0003] This invention provides a culvert reinforcement structure for soft soil subgrade to resist settlement, thereby overcoming the above-mentioned problems.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows:
[0005] A culvert reinforcement structure for resisting settlement in soft soil subgrade includes: a culvert body and a load-bearing foundation, wherein the load-bearing foundation is buried underground and filled with a waterproof material, the bottom area of the load-bearing foundation is larger than the top area of the load-bearing foundation, and the culvert body is located on top of the load-bearing foundation.
[0006] The two ends of the culvert body are an inlet and an outlet, respectively. The inlet is equipped with a filter structure that is detachably connected to the culvert body, and the filter structure is located at the lower part of the inlet.
[0007] Furthermore, the load-bearing foundation includes a top beam, a transition beam, and a bottom beam. The area of the bottom beam is larger than the area of the top beam, and the bottom area of the transition beam is larger than the top area of the transition beam. The top beam and the bottom beam are fixedly connected through the transition beam.
[0008] Furthermore, several sets of transition beams are provided between the top beam and the bottom beam, and each set of transition beams includes two symmetrically arranged transition beams;
[0009] It also includes a load-bearing column disposed between the top beam and the bottom beam, the load-bearing column being located between two symmetrically arranged transition beams, and the load-bearing column being a precast concrete component.
[0010] Furthermore, the filter structure includes a filter screen and a threaded perforated plate fixed to the outer periphery of the filter screen, and the filter screen is fixed to the load-bearing foundation by bolts provided on the threaded perforated plate.
[0011] Furthermore, the main body of the culvert includes a precast concrete cover plate, an arch, buffer piles, precast concrete segments, and a precast concrete base plate. The arch is a foamed concrete component with a steel reinforcement frame. The buffer piles, precast concrete segments, and precast concrete base plate form a waterway, with an inlet and an outlet at each end of the waterway.
[0012] The buffer pile and the precast concrete base slab are set on the top of the load-bearing foundation. The buffer pile is a precast concrete component with a bottom area larger than the top area. The precast concrete segment is set on the top of the buffer pile, the arch is set on the outer periphery of the precast concrete segment, and the precast concrete cover plate is set on the top of the arch.
[0013] Furthermore, a waterproofing material, namely tailings foam concrete, is filled between the top beam and the bottom beam.
[0014] Furthermore, it also includes a sand and gravel cushion layer, which is located below the bottom beam.
[0015] Beneficial effects:
[0016] This utility model provides a culvert reinforcement structure for soft soil subgrade to resist settlement. By placing the culvert body on a load-bearing foundation that is smaller at the top and larger at the bottom, the load-bearing foundation effectively disperses the pressure. At the same time, the water-proofing material improves the water-proofing performance of the load-bearing foundation, preventing the soil below the load-bearing foundation from softening due to moisture. This avoids significant settlement of the culvert body, ensures the stability of the culvert body, and greatly reduces the frequency of inspection and maintenance. By installing a detachable filter structure at the inlet of the culvert body and placing it at the bottom of the inlet, foreign objects are effectively intercepted and concentrated at the bottom of the inlet, preventing complete blockage of the inlet and preventing foreign objects from entering the culvert. This ensures stable operation of the culvert and normal drainage function, greatly reduces the difficulty of cleaning operations, and significantly reduces maintenance costs. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a cross-sectional schematic diagram of a culvert reinforcement structure for resisting settlement in soft soil subgrade disclosed in this utility model.
[0019] Figure 2This is a longitudinal sectional schematic diagram of a culvert reinforcement structure for resisting settlement in soft soil subgrade disclosed in this utility model.
[0020] Figure 3 This utility model discloses a structural schematic diagram of the load-bearing foundation of a culvert reinforcement structure for resisting settlement in soft soil subgrade.
[0021] Figure 4 This is a schematic diagram of the filter structure of a culvert reinforcement structure for resisting settlement in soft soil subgrade disclosed in this utility model.
[0022] In the picture:
[0023] 1. Precast concrete cover slab;
[0024] 2. Vaulted ceiling;
[0025] 3. Buffer piles;
[0026] 4. Load-bearing foundation; 41. Top beam; 42. Transition beam; 43. Bottom beam;
[0027] 5. Load-bearing columns;
[0028] 6. Precast concrete segments;
[0029] 7. Filter structure; 71. Filter screen; 72. Threaded perforated plate;
[0030] 8. Precast concrete base slab;
[0031] 9. Tailings foamed concrete. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0033] This embodiment provides a culvert reinforcement structure for resisting settlement in soft soil subgrade, such as... Figure 1 and Figure 2 As shown, it includes: a culvert body and a load-bearing foundation 4. The load-bearing foundation 4 is buried underground and filled with waterproof material. The bottom area of the load-bearing foundation 4 is larger than the top area of the load-bearing foundation 4. The culvert body is located on top of the load-bearing foundation 4.
[0034] The two ends of the culvert body are an inlet and an outlet, respectively. The inlet is provided with a filter structure 7 that is detachably connected to the culvert body. The filter structure 7 is located at the lower part of the inlet.
[0035] This embodiment provides a culvert reinforcement structure for soft soil subgrade to resist settlement. By placing the culvert body on a load-bearing foundation 4 that is smaller at the top and larger at the bottom, the load-bearing foundation 4 effectively disperses the pressure. At the same time, the water-proofing performance of the load-bearing foundation 4 is improved by using a water-proofing material to prevent the soil below the load-bearing foundation from softening due to moisture, thereby avoiding significant settlement of the culvert body and ensuring the stability of the culvert body. This significantly reduces the frequency of inspection and maintenance. By installing a detachable filter structure 7 at the inlet of the culvert body and placing it at the bottom of the inlet, foreign objects are effectively intercepted and concentrated at the bottom of the inlet, preventing complete blockage of the inlet and preventing foreign objects from entering the culvert. This ensures the stable operation of the culvert and achieves normal drainage function. The difficulty of cleaning operations is greatly reduced, and maintenance costs are significantly reduced.
[0036] Specifically, such as Figure 3 As shown, the load-bearing foundation 4 includes a top beam 41, a transition beam 42, and a bottom beam 43. The area of the bottom beam 43 is larger than the area of the top beam 41, and the bottom area of the transition beam 42 is larger than the top area of the transition beam 42. The top beam 41 and the bottom beam 43 are fixedly connected through the transition beam 42. The pressure from above is distributed by the top beam 41 and the bottom beam 43. The top beam 41, the transition beam 42, and the bottom beam 43 are all precast concrete components.
[0037] Preferably, a waterproof material is filled between the top beam 41 and the bottom beam 43, such as... Figure 1 As shown, the waterproofing material is tailings foam concrete 9, which can not only improve the waterproofing performance of the load-bearing foundation 4, but also provide strong support. It has a low density and light weight, which can reduce the overall weight of the culvert and reduce the pressure on the underlying soil layer.
[0038] Specifically, such as Figure 3 As shown, several sets of transition beams are provided between the top beam 41 and the bottom beam 43, and each set of transition beams includes two symmetrically arranged transition beams 42.
[0039] It also includes a load-bearing column 5 disposed between the top beam 41 and the bottom beam 43. The load-bearing column 5 is located between two symmetrically arranged transition beams 42. The load-bearing column 5 is a precast concrete component, which improves the load-bearing capacity of the load-bearing foundation 4.
[0040] Specifically, such as Figure 1 and Figure 2As shown, the main body of the culvert includes a precast concrete cover 1, an arch 2, a buffer pile 3, precast concrete segments 6, and a precast concrete base slab 8. The arch 2 is a foamed concrete component with a steel reinforcement skeleton. The buffer pile 3, the precast concrete segments 6, and the precast concrete base slab 8 form a waterway, with the waterway having an inlet and an outlet at its two ends.
[0041] The buffer pile 3 and the precast concrete base plate 8 are set on the top of the load-bearing foundation 4. The buffer pile 3 is a precast concrete component. The bottom area of the buffer pile 3 is larger than the top area of the buffer pile 3. The precast concrete pipe segment 6 is set on the top of the buffer pile 3. The arch 2 is set on the outer periphery of the precast concrete pipe segment 6. The precast concrete cover plate 1 is set on the top of the arch 2.
[0042] The precast concrete cover 1 can be used to pave the road surface. The precast concrete cover 1 is used to disperse the pressure from vehicles passing on the road above. The arch 2, which is made of foamed concrete mixed with steel bars, is used to further disperse the pressure from vehicles passing on the road above on the precast concrete segments 6. By using precast concrete components (concrete components with steel skeletons cast through concrete molds) for construction, the cost, difficulty and construction period of construction can be greatly reduced.
[0043] Specifically, such as Figure 4 As shown, the filter structure 7 includes a filter screen 71 and a threaded perforated plate 72 fixed to the outer periphery of the filter screen 71. The filter screen 71 is fixed to the load-bearing foundation 4 by bolts provided on the threaded perforated plate 72. The filter structure 7 can be made of a corrosion-resistant nickel-based alloy. In this embodiment, a sleeve with a threaded hole is pre-embedded in the buffer pile 3 for threaded connection with the bolts on the threaded perforated plate 72. When cleaning is required, workers can first transfer the foreign objects intercepted by the filter structure 7 to a garbage truck for removal, and then disassemble the filter structure 7 for repair or replacement.
[0044] Preferably, the system also includes a gravel cushion layer located below the bottom beam 43 to improve the bearing capacity of the foundation. In actual construction, the gravel cushion layer is first laid and leveled. Then, the bottom beam 43 is placed on the gravel cushion layer, and the transition beam 42 and the load-bearing column 5 are fixed on the bottom beam 43. Subsequently, tailings foam concrete is filled, and then the top beam 41 is fixed together with the transition beam 42 and the load-bearing column 5. Next, the buffer pile 3 and the precast concrete base plate 8 are fixed on the top beam 41. Then, the precast concrete pipe segment 6 is fixed on the buffer pile 3, and the steel reinforcement skeleton of the arch 2 is fixed on the precast concrete pipe segment 6 and the buffer pile 3. Then, the concrete is poured through the concrete mold. After the arch 2 has solidified, the precast concrete cover plate 1 is fixed on the top of the arch 2. After the overall construction is completed, the filter structure 7 is installed.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A culvert reinforcement structure for resisting settlement in soft soil subgrade, characterized in that, include: The culvert body and the load-bearing foundation (4) are buried underground. The load-bearing foundation (4) is filled with waterproof material. The bottom area of the load-bearing foundation (4) is larger than the top area of the load-bearing foundation (4). The culvert body is set on top of the load-bearing foundation (4). The two ends of the culvert body are an inlet and an outlet, respectively. The inlet is provided with a filter structure (7) that is detachably connected to the culvert body. The filter structure (7) is located at the lower part of the inlet.
2. The culvert reinforcement structure for settlement resistance in soft soil subgrade according to claim 1, characterized in that, The load-bearing foundation (4) includes a top beam (41), a transition beam (42) and a bottom beam (43). The area of the bottom beam (43) is larger than the area of the top beam (41), and the bottom area of the transition beam (42) is larger than the top area of the transition beam (42). The top beam (41) and the bottom beam (43) are fixedly connected by the transition beam (42).
3. The culvert reinforcement structure for settlement resistance in soft soil subgrade according to claim 2, characterized in that, Several sets of transition beams are provided between the top beam (41) and the bottom beam (43), and each set of transition beams includes two symmetrically arranged transition beams (42). It also includes a load-bearing column (5) disposed between the top beam (41) and the bottom beam (43), the load-bearing column (5) being located between two symmetrically arranged transition beams (42), and the load-bearing column (5) being a precast concrete component.
4. The culvert reinforcement structure for settlement resistance in soft soil subgrade according to claim 1, characterized in that, The filter structure (7) includes a filter screen (71) and a threaded plate (72) fixed on the outer periphery of the filter screen (71). The filter screen (71) is fixed on the load-bearing foundation (4) by bolts provided on the threaded plate (72).
5. A culvert reinforcement structure for settlement resistance in soft soil subgrade according to claim 1, characterized in that, The main body of the culvert includes a precast concrete cover plate (1), an arch (2), a buffer pile (3), a precast concrete segment (6), and a precast concrete base plate (8). The arch (2) is a foamed concrete component with a steel reinforcement skeleton. The buffer pile (3), the precast concrete segment (6), and the precast concrete base plate (8) form a waterway. The two ends of the waterway are the inlet and the outlet, respectively. The buffer pile (3) and the precast concrete base plate (8) are set on the top of the load-bearing foundation (4). The buffer pile (3) is a precast concrete component. The bottom area of the buffer pile (3) is larger than the top area of the buffer pile (3). The precast concrete pipe segment (6) is set on the top of the buffer pile (3). The arch (2) is set on the outer periphery of the precast concrete pipe segment (6). The precast concrete cover plate (1) is set on the top of the arch (2).
6. A culvert reinforcement structure for settlement resistance in soft soil subgrade according to claim 2, characterized in that, The space between the top beam (41) and the bottom beam (43) is filled with a waterproof material, which is tailings foam concrete.
7. A culvert reinforcement structure for settlement resistance in soft soil subgrade according to claim 2, characterized in that, It also includes a sand and gravel cushion layer, which is located below the bottom beam (43).