A structure of a reinforced steel corrugated culvert

Abstract

The utility model discloses a reinforced steel corrugated culvert structure relates to culvert engineering construction technical field, the utility model discloses an excavation after ground level, and there is foundation pit on excavation after ground level, and the bottom of foundation pit is paved with cement stabilized macadam layer, and the top surface of cement stabilized macadam layer is paved macadam layer to be with the same horizontal surface at excavation after ground level, and the steel corrugated pipe culvert is placed on macadam layer, and the both sides and bottom of steel corrugated pipe culvert are paved with flow state solidified soil layer, and two special rammer compacted areas are oppositely paved on the both sides of flow state solidified soil layer, and two special rammer compacted areas are paved on excavation after ground level, and the weak anti -deformation ability of existing steel corrugated pipe culvert base structure, the late compression settlement of easy production, the technical problem such as the dead angle of existence of the compaction of base bearing capacity deficiency and corrugated pipe two sides corner area is thoroughly solved.

Description

Technical Field

[0001] This utility model relates to the field of culvert construction technology, and in particular to a structure for reinforcing corrugated steel culverts. Background Technology

[0002] Currently, after the installation of corrugated steel pipe culverts in engineering projects, the backfilling of the corrugated steel pipe culverts generally uses crushed stone materials for multiple compaction. This places high demands on construction machinery and site conditions. When the corrugated steel pipe culvert contacts the foundation, it forms a curved triangular corner. This area has obvious compaction dead zones during backfilling construction, making compaction work difficult. Large compaction equipment lacks sufficient operating space and is difficult to operate on site. Small compaction equipment has limited compaction efficiency and cannot ensure that the compaction degree in this area meets the standards. This will directly lead to insufficient bearing capacity of the corrugated steel pipe culvert backfill structure. Moreover, manual or mechanical compaction cannot guarantee uniform soil density, and voids are easily formed in some areas, resulting in uneven stress on the corrugated steel pipe culvert foundation. Long-term use can easily cause settlement and deformation of the corrugated steel pipe culvert, affecting the overall stability and service life of the project. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a structure for reinforcing corrugated steel culverts, which solves the technical difficulties of insufficient bearing capacity of the backfill structure of traditional corrugated steel culverts due to obvious compaction dead corners during backfilling, and the uneven stress on the base of the corrugated steel culverts caused by the easy formation of voids in local areas during manual or mechanical compaction.

[0004] A reinforced corrugated steel culvert structure includes an excavated ground plane, a foundation pit on the excavated ground plane, a cement-stabilized crushed stone layer at the bottom of the foundation pit, a crushed stone layer on top of the cement-stabilized crushed stone layer until it is at the same level as the excavated ground plane, a corrugated steel culvert placed on the crushed stone layer, a fluidized solidified soil layer laid on both sides and bottom of the corrugated steel culvert, and two specially compacted zones laid opposite each other on both sides of the fluidized solidified soil layer, the two specially compacted zones being laid on the excavated ground plane.

[0005] Furthermore, the fluidized solidified soil layer, the specially compacted area, and the top of the corrugated steel culvert are covered with a structural backfill layer.

[0006] Furthermore, the diameter of the corrugated steel culvert is D, and the height of the fluidized solidified soil layer is the same as that of the specially compacted zone, with a height of 0.5D.

[0007] Furthermore, the length of the top surface of the fluidized solidified soil layer is not less than the length of the bottom surface of the fluidized solidified soil layer.

[0008] Furthermore, the length of the bottom surface of the fluidized solidified soil layer is D+100cm.

[0009] Furthermore, the filling material of the fluidized solidified soil layer is fluidized solidified soil.

[0010] Furthermore, the structural backfill layer has a length of 1.5-2.0D and a height of 1.0-2.0D.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention replaces the specially compacted areas on both sides and the crushed stone layer at the bottom of the corrugated steel culvert with a fluidized solidified soil layer. The fluidized solidified soil layer is injected in layers from the bottom of the corrugated steel culvert upwards using a self-flowing grouting method. The fluidized solidified soil is a fluid slurry. After filling, the bottom and sides of the corrugated steel culvert are completely wrapped by the fluidized solidified soil, completely filling the corners of the curved triangle formed after the contact between the corrugated steel culvert and the crushed stone layer. At the same time, it can also fill the narrow spaces and backfill gaps at the bottom and sides of the corrugated steel culvert, eliminating dead corners between the sides and bottom of the corrugated steel culvert and the fluidized solidified soil. This enhances the bearing capacity of the corrugated steel culvert backfill structure. Moreover, the fluidized solidified soil itself has uniform density and no voids, completely solving the technical problem of obvious compaction dead corners during traditional corrugated steel culvert backfilling, which leads to insufficient bearing capacity of the corrugated steel culvert backfill structure. It also solves the technical problem of uneven stress on the corrugated steel culvert base caused by the easy formation of voids in local areas during manual or mechanical compaction. Attached Figure Description

[0012] Figure 1 The existing corrugated steel culvert base structure; Figure 2 This is a structural diagram of Embodiment 1 of the steel corrugated pipe culvert base of this utility model; Figure 3 This is a structural diagram of Embodiment 2 of the steel corrugated pipe culvert base of this utility model.

[0013] In the picture: 1. Fluidized solidified soil layer; 2. Crushed stone layer; 3. Cement-stabilized crushed stone layer; 4. Specially compacted area; 5. Structural backfill layer; 6. Corrugated steel culvert; 7. Ground level after excavation. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0015] like Figure 2-3As shown, a reinforced corrugated steel culvert structure includes an excavated ground plane 7, on which a foundation pit is located. A cement-stabilized crushed stone layer 3 is laid at the bottom of the foundation pit. A crushed stone layer 2 is laid on the top surface of the cement-stabilized crushed stone layer 3 until it is at the same level as the excavated ground plane 7. A corrugated steel culvert 6 is placed on the crushed stone layer 2. A fluidized solidified soil layer 1 is laid on both sides and the bottom of the corrugated steel culvert 6. Two specially compacted zones 4 are laid opposite each other on both sides of the fluidized solidified soil layer 1. The two specially compacted zones 4 are laid on the excavated ground plane 7. The crushed stone layer 2 on both sides and the bottom of the corrugated steel culvert 6 is replaced with the fluidized solidified soil layer 1. The fluidized solidified soil layer 1 is filled with fluidized slurry fluidized solidified soil. After filling, the bottom and both sides of the corrugated steel culvert 6 are completely wrapped by the fluidized solidified soil, completely filling the corner of the curved triangle formed after the corrugated steel culvert 6 contacts the foundation.

[0016] The fluidized solidified soil layer 1, the specially compacted zone 4, and the top of the corrugated steel culvert 6 are covered with a structural backfill layer 5.

[0017] The corrugated steel culvert 6 has a diameter of D, and the fluidized solidified soil layer 1 has the same height as the specially compacted zone 4, with a height of 0.5D.

[0018] The length of the top surface of the fluidized solidified soil layer 1 is not less than the length of the bottom surface of the fluidized solidified soil layer 1.

[0019] The length of the bottom surface of the fluidized solidified soil layer 1 is D+100cm.

[0020] The filling material of the fluidized solidified soil layer 1 is fluidized solidified soil.

[0021] The structural backfill layer 5 has a length of 1.5-2.0D and a height of 1.0-2.0D.

[0022] When using it, the following steps are included: S1. After excavation, lay cement-stabilized crushed stone on the cement-stabilized crushed stone layer 3 at the bottom of the foundation pit on the ground level 7, then lay crushed stone on the crushed stone layer 2, and place the steel corrugated pipe culvert 6 on the top surface of the crushed stone layer 2. S2. Reserve a fluidized solidified soil layer 1. After laying a specially compacted zone 4 on both sides of the fluidized solidified soil layer 1, pour a layer of fluidized solidified soil into the reserved fluidized solidified soil layer 1. S3. After the fluidized solidified soil in the fluidized solidified soil layer 1 has solidified, repeat step S2 to lay it in layers step by step. S4. After the layered laying is completed, the structural backfill layer 5 is finally backfilled on the top surface of the fluidized solidified soil layer 1, the specially compacted area 4 and the steel corrugated pipe culvert 6.

[0023] The existing corrugated steel culvert 6 has the following structure: Figure 1As shown, there are specially compacted zones 4 on both sides of the corrugated steel pipe culvert 6, and a crushed stone layer 2 at the bottom. During the laying process, when the crushed stone is laid at the bottom of the corrugated steel pipe culvert 6, a curved triangular corner will be formed. There are obvious compaction dead corners in this area during backfilling, making the compaction operation difficult and making it impossible to ensure that the compaction degree of this part meets the standard. When the specially compacted zones 4 are laid on both sides of the corrugated steel pipe culvert 6, there are still dead corners in the contact area between the corrugated steel pipe culvert 6 and the specially compacted zones 4 during backfilling, and it is still impossible to ensure that the compaction degree of this part meets the standard. This directly leads to insufficient bearing capacity of the backfill structure of the corrugated steel pipe culvert. Moreover, it is difficult to ensure uniform compaction of the soil by manual or mechanical compaction, and voids are easily formed in some areas, resulting in uneven stress on the base of the corrugated steel pipe culvert. Long-term use is prone to causing settlement and deformation of the corrugated steel pipe culvert 6.

[0024] This invention replaces the specially compacted areas 4 on both sides of the corrugated steel pipe culvert 6 and the crushed stone layer 2 at the bottom with a fluidized solidified soil layer 1. The fluidized solidified soil layer 1 is injected in layers from the bottom of the corrugated steel pipe culvert 6 upwards using a self-flowing grouting method. The fluidized solidified soil is a fluid slurry. After filling, the bottom and sides of the corrugated steel pipe culvert 6 are completely wrapped by the fluidized solidified soil, completely filling the corners of the curved triangle formed after the contact between the corrugated steel pipe culvert 6 and the crushed stone layer 2. At the same time, it can also fill the narrow spaces and backfill gaps at the bottom and sides of the corrugated steel pipe culvert 6, so that there are no dead corners between the sides and bottom of the corrugated steel pipe culvert and the fluidized solidified soil, thereby enhancing the bearing capacity of the backfill structure of the corrugated steel pipe culvert 6. Moreover, the fluidized solidified soil itself is uniformly dense and has no voids, which can reduce the settlement and deformation of the corrugated steel pipe culvert 6.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structure for reinforcing corrugated steel culverts, characterized in that: The excavated ground plane (7) includes a foundation pit on the excavated ground plane (7), a cement-stabilized crushed stone layer (3) is laid at the bottom of the foundation pit, a crushed stone layer (2) is laid on the top surface of the cement-stabilized crushed stone layer (3) until it is at the same level as the excavated ground plane (7), a steel corrugated pipe culvert (6) is placed on the crushed stone layer (2), a fluidized solidified soil layer (1) is laid on both sides and bottom of the steel corrugated pipe culvert (6), and two specially compacted zones (4) are laid opposite each other on both sides of the fluidized solidified soil layer (1), and the two specially compacted zones (4) are laid on the excavated ground plane (7).

2. The structure of a reinforced corrugated steel culvert according to claim 1, characterized in that: The fluidized solidified soil layer (1), the specially compacted zone (4), and the corrugated steel culvert (6) are covered with a structural backfill layer (5).

3. The structure of a reinforced corrugated steel culvert according to claim 2, characterized in that: The corrugated steel culvert (6) has a diameter of D, and the fluidized solidified soil layer (1) has the same height as the specially compacted zone (4), with a height of 0.5D.

4. The structure of a reinforced corrugated steel culvert according to claim 3, characterized in that: The length of the top surface of the fluidized solidified soil layer (1) is not less than the length of the bottom surface of the fluidized solidified soil layer (1).

5. The structure of a reinforced corrugated steel culvert according to claim 4, characterized in that: The length of the bottom surface of the fluidized solidified soil layer (1) is D+100cm.

6. The structure of a reinforced corrugated steel culvert according to claim 5, characterized in that: The filling material of the fluidized solidified soil layer (1) is fluidized solidified soil.

7. The structure of a reinforced corrugated steel culvert according to claim 6, characterized in that: The structural backfill layer (5) has a length of 1.5-2.0D and a height of 1.0-2.0D.

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