Support device for sewage pipes

Abstract

The utility model discloses a support device for sewage pipeline, support device includes subgrade soil, medium coarse sand, steel support, steel sheet pile, support steel pipe, steel waist beam and cushion layer, wherein, support device whole is located below ground, and the both sides of groove are installed with steel sheet pile and are stable, and support steel pipe is located the uppermost of support device, and the both sides of support steel pipe are installed with steel waist beam, and the below of support steel pipe and steel waist beam uses subgrade soil and fills, and the both sides of the bottom of groove all are paved with a layer of cushion layer, and the above of cushion layer is paved with medium coarse sand, and rainwater pipe and sewage pipe are located on the medium coarse sand that lays, and then use medium coarse sand to fill the gap to rainwater pipe half height place and then use subgrade soil and fill. The support device for sewage pipeline has good adaptability, speeds up construction period, and the corrosion resistance of support device is strong, and frequent repair replacement is not needed.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of road pipeline construction technology, and more specifically, relate to a support device for sewage pipelines. Background Technology

[0002] As a core component of urban drainage systems, sewage pipelines are widely buried under roads, in green belts, and around buildings, responsible for collecting and transporting domestic sewage and industrial wastewater. Their installation environments are complex and diverse, often facing the influence of natural factors such as soft soil foundations, geological subsidence, and changes in groundwater levels. Furthermore, corrosive media such as acids, alkalis, salts, and organic matter contained in sewage can cause continuous wear and tear on the pipeline structure. Therefore, specialized support devices are needed to fix and protect the pipelines to ensure their operational stability and service life.

[0003] Currently, various solutions have been developed for the support technology of sewage pipelines. The mainstream methods include traditional brick masonry support structures, temporary steel sheet pile support systems, cast-in-place concrete integral support, and modular assembled support devices. Brick masonry support is suitable for shallow-buried pipeline sections with stable geological conditions, forming a wrap-around protection through brick and stone masonry. Steel sheet pile support is mostly used for temporary reinforcement during the construction phase, relying on the bending strength of steel to resist soil pressure. Cast-in-place concrete support forms an integral protective sleeve through on-site casting, which is suitable for scenarios with high support strength requirements. Modular assembled support, with its advantages of convenient assembly and disassembly, is gradually being used more and more in the maintenance and renovation of small and medium diameter pipelines.

[0004] The existing support technology still has obvious shortcomings: (1) poor adaptability. Traditional brick masonry and cast-in-place concrete support are fixed structures and cannot flexibly adjust the size and support strength according to the pipe diameter, burial depth and geological conditions, making it difficult to adapt to complex laying scenarios; (2) low construction efficiency. Brick masonry and cast-in-place concrete support need to be built or poured on site, with a long curing cycle and is greatly restricted by weather and construction site, which cannot meet the needs of rapid construction; (3) insufficient corrosion resistance and durability. Metal support such as steel sheet piles is easily corroded by corrosive media in sewage and rusts. Brick masonry structures are easily weathered and damaged in a humid environment for a long time, resulting in a short service life of the support structure and frequent maintenance and replacement. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a support device for sewage pipelines. By adding a bedding layer and laying medium-coarse sand, rainwater pipes and sewage pipes can be securely installed and fixed in designated locations. By backfilling with medium-coarse sand and subgrade soil, it avoids both uneven backfilling materials that could cause pipeline cracking due to load and scratches on the outer wall of the pipeline. The steel support system, composed of steel supports and steel waist beams, balances the high compressibility lateral pressure caused by the backfilling of subgrade soil.

[0006] To achieve the above objectives, this utility model provides a support device for sewage pipelines, comprising: The support consists of sheet piles on both sides of the trench, a supporting steel pipe at the top of the support device, steel waist beams on both sides of the supporting steel pipe, and a steel support connected to the sheet piles on one side and the steel waist beams on the other side.

[0007] Furthermore, the supporting steel pipe is a Φ325×12 steel pipe.

[0008] Furthermore, the steel waist beam is a continuous 350*350 H-shaped steel waist beam.

[0009] Furthermore, the steel support and the steel waist beam together constitute a steel support system.

[0010] Furthermore, the steel sheet piles are treated with grease at the interlocking joints and anti-corrosion tape wrapped around the corners for corrosion protection.

[0011] Furthermore, it is characterized by including a pad layer disposed above both sides of the bottom of the trench.

[0012] Furthermore, medium-coarse sand is laid on top of the cushion layer.

[0013] Furthermore, it also includes subgrade soil and medium-coarse sand used for backfilling.

[0014] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects: 1. The device of this utility model can install and fix rainwater pipes and sewage pipes in a designated position by adding a pad layer and laying medium-coarse sand. By backfilling medium-coarse sand and subgrade soil, it can avoid cracking of pipes due to uneven backfill material and avoid scratching and damage to the outer wall of the pipes. The steel support system composed of steel supports and steel waist beams can balance the high compressibility lateral pressure caused by backfilling the subgrade soil.

[0015] 2. The device of this utility model can adapt to different pipe sizes by backfilling the subgrade soil and medium-coarse sand outside the pipe, which increases the adaptability of the support device. The modular structural design shortens the construction cycle, and the anti-corrosion treatment on the steel sheet piles and steel waist beams extends the service life of the support device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a support device for sewage pipelines according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a support device for sewage pipelines according to an embodiment of the present invention.

[0017] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-Ground, 2-Trench, 3-Pipe pit edge, 4-Rainwater pipe, 5-Sewage pipe, 6-Subgrade soil, 7-Medium-coarse sand, 8-Steel support, 9-Steel sheet pile, 10-Support steel pipe, 11-Steel waist beam, 12-Subbase. Detailed Implementation

[0018] 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 the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not 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. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0022] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] This novel embodiment provides a support device for sewage pipelines, such as... Figure 1 , Figure 2 As shown, the structure includes subgrade soil 6, medium-coarse sand 7, steel supports 8, sheet piles 9, supporting steel pipes 10, steel waist beams 11, and a subbase 12. The entire support system is located inside ground level 1. A trench 2 exists on ground level 1, with its outer edge outlined as the pipe pit edge line 3. The bottom of trench 2 is divided into a higher side and a lower side. Rainwater pipes 4 are installed on the higher side of the bottom of trench 2, and sewage pipes 5 are installed on the lower side. Subbase layers 12 are laid above both sides of the bottom of trench 2. Medium-coarse sand 7 is laid on top of the subbase 12. The medium-coarse sand 7 must be of uniform particle size and free of sharp objects such as bricks, gravel, and concrete blocks to prevent scratching and damage to the outer walls of the rainwater pipe 4 and sewage pipe 5. Medium-coarse sand 7 is also used for backfilling the outer sides of the rainwater pipe 4 and sewage pipe 5. Medium-coarse sand 7 has a certain degree of plasticity, allowing it to evenly wrap around the pipes during backfilling, reducing localized stress concentration, and preventing cracking of the pipes due to uneven loads during subsequent backfilling of the subgrade soil 6. When the storm drain pipe 4 reaches its midpoint, subgrade soil 6 is used for backfilling. After the subgrade soil 6 is backfilled to the subgrade bottom elevation designed for construction, it can directly serve as the bearing base of the road base. It is necessary to ensure the compaction degree of the subgrade soil 6 to prevent subsequent road settlement and cracking. A supporting steel pipe 10 is installed above the subgrade soil 6, which is also the top of the support device. The supporting steel pipe 10 is a Φ325×12 steel pipe. Steel waist beams 11 are installed on both sides of the supporting steel pipe 10. The steel waist beams 11 are made of 350* A 350H-type steel wainscoting is installed along its entire length. Steel sheet piles 9 are installed on both sides of the trench 2 to reinforce the trench 2 under construction. Steel supports 8 are installed between the steel sheet piles 9 and the steel wainscoting 11. One side of the steel supports 8 is connected to the steel sheet piles 9, and the other side is connected to the steel wainscoting 11. The horizontal spacing of the steel supports 8 is 4m. The steel supports 8 and the steel wainscoting 11 form a steel support system, which is mainly subjected to horizontal forces and can accurately balance the high compressibility lateral pressure of the backfilled subgrade soil 6, avoiding deformation and slinging of the steel sheet piles 9. The device of this utility model, by adding a cushion layer and laying medium-coarse sand, can properly install and fix the rainwater pipes and sewage pipes in the designated positions. By backfilling with medium-coarse sand and subgrade soil, it avoids cracking of the pipes due to uneven backfill material and scratches on the outer wall of the pipes. The steel support system formed by the steel supports and the steel wainscoting balances the high compressibility lateral pressure caused by the backfilled subgrade soil.

[0024] Specifically, in the construction of sheet piles 9, the first step is to construct positioning piles. The first sheet pile 9 driven in serves as the positioning pile. When the crane lifts the first sheet pile 9, it is important to avoid oblique pulling and to prevent twisting and damage to the pile head. This is because the first sheet pile 9 will become the reference for driving subsequent sheet piles. During the driving process, measuring instruments such as vertical alignment devices should be used to observe the pile position and inclination. Careful installation is required. Sheet piles 9 generally tend to tilt in the direction of driving, so a certain tilt should be maintained in the opposite direction of the driving direction beforehand to ensure the sheet piles 9 are straight. Then, install the other sheet piles 9, driving in 3 / 4 to 4 / 5 of their length as the initial pile. Then, begin the formal pile driving, driving in the remaining 1 / 5 to 1 / 4 of the pile length (aligning the interlock). Use the weight of a hammer to press the pile in, gently vibrating or relying on its own weight to press in 1 / 2 to 2 / 3 of the pile length. Then insert the second group (piles), and so on, until 5 to 6 groups (taking 12 piles per group as an example). After this, you can begin driving the piles, driving them from the outside in, then from the inside out, repeating this several times until the inner piles reach the design elevation. The last pile serves as the first pile for the second driving. During the driving process, a designated person must observe the tilt of the sheet piles from both the normal and axial directions.

[0025] As a preferred option, the support device for the sewage pipeline adopts a simple structure to support the rainwater pipe 4 and the sewage pipe 5. For rainwater pipes 4 and sewage pipes 5 of different sizes, the construction size can be adapted by backfilling the subgrade soil 6 and medium-coarse sand 7. The support device uses steel sheet piles 9 to reinforce the trench 2. The steel support system composed of steel supports 8 and steel waist beams 11 balances the high compressibility lateral pressure. The modular structure shortens the measurement time in actual construction and improves construction efficiency. The steel sheet piles 9 and steel waist beams 11 need to be treated with anti-corrosion. Grease needs to be added to the interlocking joint of the steel sheet piles 9. The grease can not only play a role in anti-corrosion, but also prevent water and soil impurities from entering. Anti-corrosion tape is wrapped around the corner of the steel sheet piles 9 and steel waist beams 11 to avoid damage to the anti-corrosion layer due to stress concentration at this part. The device of this utility model adapts to different pipe sizes by backfilling the subgrade soil and medium-coarse sand outside the pipe, increasing the adaptability of the support device. The modular structural design shortens the construction cycle, and the anti-corrosion treatment on the steel sheet piles and steel waist beams extends the service life of the support device.

[0026] In another embodiment of this utility model, a support device for sewage pipelines is provided, comprising the following steps: Based on the construction drawings and geological survey report, the internal calculations for the driving positions of the pipe pit edge line 3, steel sheet piles 9, the installation elevation of the steel waist beam 11, and the spacing of the steel supports 8 were completed. The total station and level were used for on-site layout and marking, and plane control piles and elevation benchmarks were set up. After the supervisor reviewed and approved them, the marks were retained.

[0027] The first sheet pile 9 is the positioning pile. After the first pile is driven in, the actual pile driving begins. The pile is driven by the weight of the hammer. The pile is driven from the outside to the inside, and then from the inside to the outside, several times, until the inner pile is driven to the design elevation.

[0028] The temporary road was constructed with a 30cm rough slag base and a 2cm steel plate, and the excavated soil was properly handled. Support construction was carried out after the soil excavation was completed.

[0029] Once the support construction has passed inspection, the sheet pile removal can begin. Before removing the sheet piles, the removal method, sequence, timing, and treatment of the soil holes should be carefully studied.

[0030] In summary, the support device used for sewage pipelines has good adaptability, accelerates the construction cycle, and has strong corrosion resistance, eliminating the need for frequent maintenance and replacement.

[0031] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 support device for sewage pipelines, characterized in that, include: Sheet piles (9) on both sides of the trench (2), a supporting steel pipe (10) at the top of the support device, steel waist beams (11) on both sides of the supporting steel pipe (10), and steel supports (8) connected to the sheet piles (9) on one side and to the steel waist beams (11) on the other side.

2. The support device for sewage pipelines according to claim 1, characterized in that, The supporting steel pipe (10) is a Φ325×12 steel pipe.

3. A support device for sewage pipelines according to claim 2, characterized in that, The steel waist beam (11) is a 350*350H type steel waist beam with a continuous length.

4. A support device for sewage pipelines according to claim 3, characterized in that, The steel support (8) and the steel waist beam (11) together constitute a steel support system.

5. A support device for sewage pipelines according to claim 4, characterized in that, The sheet pile (9) is treated with grease at the interlock and anti-corrosion tape wrapped around the corner.

6. A support device for sewage pipelines according to any one of claims 1-5, characterized in that, It also includes a pad (12) located above the bottom sides of the trench (2).

7. A support device for sewage pipelines according to claim 6, characterized in that, Medium-coarse sand (7) is laid on top of the cushion layer (12).

8. A support device for sewage pipelines according to any one of claims 1-5, characterized in that, It also includes subgrade soil (6) for backfilling and medium-coarse sand (7).

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