Connection structure of newly-built large-diameter rainwater pipeline avoiding old box culvert
Patent Information
- Application Number
- CN202522229848.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-22
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-22
AI Technical Summary
[0003]而现有技术中，对于此类拟建管道与现状管线标高冲突的情况，一般都是采用改迁现状管线或者设置交汇井的处理方式，但是上述方式存在手续办理复杂，工期长，造价高，管道寿命短，清掏难度大的问题，因此，可做进一步改善
1、该新建大直径雨水管道避让老旧箱涵连接构造，通过将原本标高冲突的拟建管道调整为高度更低的倒虹箱涵，并在两段新增进水井及出水井，相比于老旧箱涵改迁、拟建管线绕行，本实用新型施工简单快捷，成本更低，工期更短，并且进水井的消力池能更好保护管道，出水井中的沉沙池更方便后期检修维护。
Smart Images
Figure CN224902342U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drainage engineering technology, specifically to a connection structure for newly built large-diameter rainwater pipes to avoid old box culverts. Background Technology
[0002] With the rapid development of my country's economic construction, underground municipal pipelines are becoming more and more complete and complex. However, some existing structures have been built for a long time and the archives are incomplete, making it impossible to explore, avoid, and adjust the overall elevation of new pipelines during the design stage. This results in conflicts between the elevation of new drainage projects and existing structures. Therefore, a reasonable crossing method is crucial for construction and subsequent operation and management.
[0003] In existing technologies, when the elevation of a proposed pipeline conflicts with that of an existing pipeline, the common approach is to relocate the existing pipeline or install a junction well. However, these methods involve complex procedures, long construction periods, high costs, short pipeline lifespans, and difficult cleaning. Therefore, further improvements are needed. Utility Model Content
[0004] To address the aforementioned problems, this utility model provides the following technical solution: a new large-diameter rainwater pipe connection structure that avoids old box culverts, including the old box culvert body. Inlet and outlet wells are excavated on both sides of the old box culvert body. An inverted siphon box culvert connects the inlet and outlet wells, and the inverted siphon box culvert is located directly below the old box culvert body. An upstream inlet pipe and a downstream outlet pipe are respectively connected to the top of the inlet and outlet wells. A stilling basin is installed at the bottom of the inlet well, and a sedimentation basin is installed at the bottom of the outlet well. The bottom wall of the well is provided with a pebble buffer layer. The inlet and outlet wells are also equipped with upstream and downstream inspection wells for maintenance. A concrete backfill layer is provided between the bottom side of the old box culvert body and the top side of the inverted siphon box culvert. Fine stone concrete sealing strips are provided at both ends of the inverted siphon box culvert and at the connection between the inlet and outlet wells. The inlet and outlet wells are equipped with ladders made of ductile iron, and the ladders lead to the corresponding upstream and downstream inspection wells. The ladders facilitate maintenance personnel to climb and carry out internal inspection and maintenance.
[0005] As an optimization, the bottom elevation of the old box culvert body is at least 0.2 meters away from the top elevation of the inverted siphon box culvert.
[0006] As an optimization, the cross-sectional area of the inverted siphon box culvert is larger than the cross-sectional areas of the upstream inlet pipe and the downstream outlet pipe.
[0007] As an optimization, the depth of the stilling basin and sedimentation basin is at least 0.6 meters.
[0008] As an optimization, the depth of the pebble buffer layer is at least 0.1 meters.
[0009] As an optimization, the concrete backfill layer and fine stone concrete sealing strip under the old box culvert body are made of micro-expansion concrete.
[0010] As an optimization, the ladder includes a fixed bracket fixedly installed on the inner wall of the well. Several sets of steps are fixedly installed at equal intervals on both sides of the fixed bracket. Several fixed rods are fixedly installed at equal intervals on one side of the front of the fixed bracket. A support rod is fixedly installed at one end of the front of each fixed rod.
[0011] The beneficial effects of this utility model are: 1. The new large-diameter rainwater pipeline avoids the connection structure of the old box culvert. By adjusting the proposed pipeline with conflicting elevations to a lower inverted siphon box culvert, and adding inlet and outlet wells at both sections, this utility model is simpler and faster to construct than the relocation of the old box culvert and the detour of the proposed pipeline. It also has a lower cost and shorter construction period. Furthermore, the stilling basin in the inlet well can better protect the pipeline, and the sedimentation basin in the outlet well is more convenient for later inspection and maintenance. Attached Figure Description
[0012] Figure 1 This is a front view of the structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the ladder structure of this utility model.
[0013] In the diagram: 1. Old box culvert body; 2. Inlet well; 3. Outlet well; 4. Inverted siphon box culvert; 5. Upstream inlet pipe; 6. Downstream outlet pipe; 7. Stilling basin; 8. Sedimentation basin; 9. Gravel buffer layer; 10. Upstream inspection well; 11. Downstream inspection well; 12. Concrete backfill layer; 13. Fine aggregate concrete sealing strip; 14. Ladder; 15. Fixed support; 16. Step; 17. Fixed rod; 18. Support rod. Detailed Implementation
[0014] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 application.
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Please see Figure 1-2 The newly constructed large-diameter rainwater pipe avoids the connection structure of the old box culvert, including the old box culvert body 1. Inlet wells 2 and outlet wells 3 are excavated on both sides of the old box culvert body 1. An inverted siphon box culvert 4 connects the inlet wells 2 and outlet wells 3, and is located directly below the old box culvert body 1. The bottom elevation of the old box culvert body 1 is at least 0.2 meters away from the top elevation of the inverted siphon box culvert 4. The tops of the inlet wells 2 and outlet wells 3 are respectively connected to an upstream inlet pipe 5 and a downstream outlet pipe 6. The cross-sectional area of the inverted siphon box 4 is larger than that of the upstream inlet pipe 5 and the downstream outlet pipe 6. A stilling basin 7 is installed at the bottom of the inlet well 2, and a sedimentation basin 8 is installed at the bottom of the outlet well 3. The depth of the stilling basin 7 and sedimentation basin 8 is at least 0.6 meters. The bottom wall of the inlet well 2 is... There is a pebble buffer layer 9 with a depth of at least 0.1 meters. The inlet well 2 and outlet well 3 are also equipped with an upstream inspection well 10 and a downstream inspection well 11 for maintenance. A concrete backfill layer 12 is provided between the bottom side of the old box culvert body 1 and the top side of the inverted siphon box culvert 4. Fine stone concrete sealing strips 13 are provided at both ends of the inverted siphon box culvert 4 and at the connection between the inlet well 2 and the outlet well 3. The concrete backfill layer 12 and the fine stone concrete sealing strip 13 below the old box culvert body 1 are made of micro-expansion concrete. The inlet well 2 and outlet well 3 are both equipped with ductile iron ladders 14, and the ladders 14 lead into the corresponding upstream inspection well 10 and downstream inspection well 11. The ladders 14 facilitate maintenance personnel to climb and carry out internal inspection and maintenance. Please see Figure 3 The ladder 14 includes a fixed bracket 15 fixedly installed on the inner wall of the well. Several sets of steps 16 are fixedly installed at equal intervals on both sides of the fixed bracket 15. Several fixed rods 17 are fixedly installed at equal intervals on one side of the front of the fixed bracket 15. A support rod 18 is fixedly installed at one end of the front of the support rod 17. Maintenance personnel can easily climb up and down by holding the support rod 18.
[0017] The construction of a new large-diameter rainwater pipe that avoids the connection of an old box culvert includes the following steps. In this utility model, an old box culvert with external dimensions BXH=2.2m×3m and a DN2000 upstream water pipe are used as an example for illustration: S1: Before construction, the old box culvert 1 was explored and protected by the suspension method after the exploration was completed. The elevation of the inverted siphon box culvert 4 was determined by the bottom elevation of the old box culvert 1. S2: Determine the specifications of the inverted siphon box culvert 4 based on the cross-sectional area of the upstream water pipe 5, and then determine the excavation and support method based on the current geological conditions and the elevation of the inverted siphon box culvert 4. S3: After the civil engineering excavation of the inlet well 2, outlet well 3 and inverted siphon box culvert 4 reaches the predetermined elevation, the steel reinforcement is tied, and the space for the stilling basin 7 is reserved in the inlet well 2, and the space for the sedimentation basin 8 is reserved in the outlet well 3. The inlet well 2, outlet well 3 and inverted siphon box culvert 4 are all cast in one go. S4: To ensure that the compaction of the bottom of the old box culvert 4 meets the requirements, concrete backfilling is used below the bottom elevation of the old box culvert 4, and the original state is restored above the bottom elevation. S5: After the construction of the water intake well 2 is completed, a pebble buffer layer 9 and a ladder for personnel to go up and down will be installed; In this utility model, regarding the selection of the specifications of the inverted siphon box culvert 4, the distance between the inlet well 2, the outlet well 3 and the outside of the old box culvert 4 is 3 meters, the width of the old box culvert 1 is 2.2 meters, so the length of the inverted siphon box culvert 4 is 8.2 meters; the upstream water pipe 5 has a diameter of DN2000, and in order to meet the water flow requirements, the internal dimensions of the inverted siphon box culvert 4 are B×H=2.8m×1.3m, and the thickness of the bottom plate, side walls and top plate is uniformly 0.3 meters; the bottom of the old box culvert 1 is buried at a depth of 4.5 meters, and the top of the inverted siphon box culvert 4 is 0.2 meters away from the bottom of the old box culvert 1, so the bottom of the inverted siphon box culvert 4 is buried at a depth of 6.6 meters.
[0018] The inlet well 2 and outlet well 3 are buried at a depth of 7.3 meters, with internal dimensions of A×B=4m×1.5m and a wall thickness of 0.3 meters. The stilling basin 7 and the sedimentation basin 8 are both 0.3 meters high, and the pebble buffer layer 9 is 0.1 meters high.
[0019] In summary, the new large-diameter rainwater pipeline avoids the connection structure of the old box culvert. By adjusting the proposed pipeline with conflicting elevations to a lower-elevation inverted siphon box culvert 4, and adding inlet wells 2 and outlet wells 3 in both sections, compared with the relocation of the old box culvert and the detour of the proposed pipeline, this utility model is simpler and faster to construct, with lower costs and a shorter construction period. Furthermore, the stilling basin 7 in the inlet well 2 can better protect the pipeline, and the sedimentation basin 8 in the outlet well 3 is more convenient for later inspection and maintenance.
[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings.
[0022] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A new large-diameter rainwater pipe connection structure that avoids old box culverts, including the old box culvert body (1), characterized in that: The old box culvert body (1) has inlet wells (2) and outlet wells (3) excavated on both sides. An inverted siphon box culvert (4) connects the inlet wells (2) and outlet wells (3), and the inverted siphon box culvert (4) is located directly below the old box culvert body (1). The tops of the inlet wells (2) and outlet wells (3) are respectively connected to an upstream water pipe (5) and a downstream water pipe (6). An energy dissipation pool (7) is set at the bottom of the inlet well (2), and a sedimentation pool (8) is set at the bottom of the outlet well (3). A pebble buffer layer (9) is set on the bottom wall of the inlet well (2). The inlet well (2) and outlet well (3) are also equipped with an upstream inspection well (10) and a downstream inspection well (11) for maintenance. A concrete backfill layer (12) is provided between the bottom side of the old box culvert body (1) and the top side of the inverted siphon box culvert (4). Fine stone concrete sealing strips (13) are provided at both ends of the inverted siphon box culvert (4) and the connection between the inlet well (2) and the outlet well (3). A ladder (14) made of ductile iron is provided inside the inlet well (2) and the outlet well (3), and the ladder (14) leads into the corresponding upstream inspection well (10) and downstream inspection well (11).
2. The connection structure for newly constructed large-diameter rainwater pipes to avoid old box culverts as described in claim 1, characterized in that: The bottom elevation of the old box culvert body (1) is at least 0.2 meters away from the top elevation of the inverted siphon box culvert (4).
3. The connection structure for newly constructed large-diameter rainwater pipes to avoid old box culverts as described in claim 1, characterized in that: The cross-sectional area of the inverted siphon box culvert (4) is larger than the cross-sectional areas of the upstream inlet pipe (5) and the downstream outlet pipe (6).
4. The connection structure for newly constructed large-diameter rainwater pipes to avoid old box culverts as described in claim 1, characterized in that: The depth of the stilling basin (7) and the sedimentation basin (8) is at least 0.6 meters.
5. The connection structure for newly constructed large-diameter rainwater pipes to avoid old box culverts as described in claim 1, characterized in that: The pebble buffer layer (9) has a depth of at least 0.1 meters.
6. The connection structure for newly constructed large-diameter rainwater pipes to avoid old box culverts as described in claim 1, characterized in that: The ladder (14) includes a fixed bracket (15) fixedly installed on the inner wall of the well. Several sets of steps (16) are fixedly installed at equal intervals on both sides of the fixed bracket (15). Several fixed rods (17) are fixedly installed at equal intervals on one side of the front of the fixed bracket (15). A support rod (18) is fixedly installed at one end of the front of the fixed rod (17).