A support structure for a water supply and drainage channel

Abstract

This utility model discloses a support structure for water supply and drainage trenches, comprising: steel sheet piles on both sides of the distribution direction of rainwater pipes and sewage pipes, with a steel pipe between the two steel sheet piles, the steel pipe being positioned above the rainwater pipes and sewage pipes, and both ends of the steel pipe being fixedly connected to the steel sheet piles by steel waist beams; a trapezoidal rainwater pipe foundation pit is excavated along the length of the rainwater pipe, with a medium-coarse sand cushion layer laid at the bottom of the rainwater pipe foundation pit, a medium-coarse sand backfill layer above the medium-coarse sand cushion layer, and a roadbed soil backfill layer backfilled on top of the medium-coarse sand backfill layer; a trapezoidal sewage pipe foundation pit is excavated along the length of the sewage pipe, with a medium-coarse sand cushion layer laid at the bottom of the sewage pipe foundation pit, a medium-coarse sand backfill layer above the medium-coarse sand cushion layer, and a roadbed soil backfill layer backfilled on top of the medium-coarse sand backfill layer. This structure avoids interference with the pipelines caused by external stress and vibration during construction, achieving the purpose of reducing disturbance.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of drainage support technology, and more specifically, relate to a support structure for water supply and drainage trenches. Background Technology

[0002] In the process of urbanization and industrial development, water supply and drainage pipe networks are critical infrastructure for ensuring the normal operation of production and daily life. During their service life, these pipelines must not only withstand internal loads such as the weight of the medium and internal pressure, but also cope with complex external environmental challenges, such as soil pressure, ground traffic vibration, thermal expansion and contraction caused by temperature changes, and potential seismic forces. Without effective and stable support and protection, the pipeline system is highly susceptible to displacement, excessive deformation, loosening of joints, or pipe damage, which can lead to accidents such as leaks, blockages, and even ground subsidence. Therefore, designing reliable support structures to fix the pipeline position, distribute and transfer loads, and adapt to environmental deformation is a necessary prerequisite for ensuring the long-term safe and stable operation of the pipe network system.

[0003] In existing technologies, a widely used support method is the concrete saddle bearing. This structure typically involves setting up a series of concrete piers along the pipeline laying path, at designed intervals, through on-site casting or installation of precast components. The top of the pier is made into a concave arc surface that matches the outer diameter of the pipeline, and the pipeline is placed directly on the saddle. In some cases, to reduce friction or provide cushioning, rubber gaskets or asphalt felt are added between the pipeline and the contact surface of the saddle. This support method relies on the self-weight and bearing capacity of the concrete piers to provide vertical support for the pipeline. It has a simple structure, is relatively convenient to construct, and is commonly used in many pipeline projects laid on the ground or in shallow trenches.

[0004] However, during the construction of some projects, situations involving multiple types and complexities of underground pipelines may arise. To ensure the smooth implementation of drainage pipelines, it is necessary to protect the existing underground pipelines. For pipelines that cannot be shut down, local support and protection measures should be implemented to prevent damage to the existing pipelines during construction. The existing solutions described above are not applicable to this type of project requiring temporary pipeline support. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a drainage trench support structure. By setting up foundation pits along the length of the rainwater pipe and sewage pipe, and within these pits, constructing a medium-coarse sand cushion layer, a medium-coarse sand backfill layer, and a roadbed soil backfill layer from low to high, the structure avoids interference from external construction stress and vibration on the pipelines. Simultaneously, steel sheet piles are installed on both sides of the pipelines, and steel pipes are installed at the top to isolate the soil containing the rainwater pipe and sewage pipe, providing additional support to the isolated soil and thus reducing disturbance.

[0006] To achieve the above objectives, this utility model provides a drainage trench support structure, comprising: steel sheet piles disposed on both sides of the distribution direction of rainwater pipes and sewage pipes, a steel pipe disposed between the two steel sheet piles, the steel pipe being disposed above the rainwater pipes and sewage pipes, and the two ends of the steel pipe being fixedly connected to the steel sheet piles by steel waist beams; A trapezoidal rainwater pipe foundation pit is dug along the length of the rainwater pipe. A medium-coarse sand cushion layer is laid at the bottom of the rainwater pipe foundation pit. A medium-coarse sand backfill layer is laid on top of the medium-coarse sand cushion layer, and a roadbed soil backfill layer is backfilled on top of the medium-coarse sand backfill layer. The sewage pipe has a trapezoidal cross-section sewage pipe foundation pit dug along its length direction. A medium-coarse sand cushion layer is laid at the bottom of the sewage pipe foundation pit. A medium-coarse sand backfill layer is laid on top of the medium-coarse sand cushion layer, and a roadbed soil backfill layer is backfilled on top of the medium-coarse sand backfill layer.

[0007] Furthermore, the bottom end of the sheet pile extends downward into the depth of the soil layer, and the upper end is located below the ground surface. The upper end of the sheet pile is also provided with a trapezoidal cross-section foundation pit.

[0008] Furthermore, the steel waist beam includes a steel waist beam end plate fixed to the steel sheet pile, which is arranged on the inner side of the steel sheet pile along the laying direction of the pipeline; The side of the steel waist beam end plate is provided with two rows of I-beams. The I-beams are arranged at equal intervals along the length of the steel waist beam end plate. One end of the I-beams is fixed to the steel waist beam end plate, and the other end is fixed with a head plate. That is, the end plate and the steel waist beam end plate are respectively located at both ends of the I-beam.

[0009] Furthermore, a support frame is provided below the steel waist beam to provide reinforced support. The support frame is a triangular structure, which includes a horizontal plate and a vertical plate. A diagonal brace is provided between the horizontal plate and the vertical plate. The horizontal plate is welded and fixed to the steel waist beam end plate and the end plate. The vertical plate is welded and fixed to the steel sheet pile. The diagonal brace is provided between the horizontal plate and the vertical plate.

[0010] Furthermore, multiple supports are provided, equidistantly arranged along the length of the steel sheet pile, and each support is located at the midpoint between two adjacent steel waist beams; The steel waist beam end plate and end plate are simultaneously welded to the cross plate of the support.

[0011] Furthermore, the steel pipe is a round steel pipe with steel pipe end plates at both ends for sealing. The steel pipe end plates are welded and fixed to the end plates. The end of the steel pipe is also provided with a steel shoe plate along its circumference. The steel shoe plate connects the steel pipe and the steel pipe end plates to reinforce the connection between the two.

[0012] Furthermore, at the corners of the sheet pile, the steel waist beam is provided with multiple stiffening plates to reinforce the corner connections.

[0013] Furthermore, the pit sidewalls of the rainwater pipe and sewage pipe are sloped, and waterproof geotextile is provided on the slope, which is fixed with short soil nails.

[0014] Furthermore, a water collection well is provided below the foundation pit of the rainwater pipe and the sewage pipe, and the water collection well is spaced apart along the length of the foundation pit.

[0015] Furthermore, on both sides of the steel sheet pile, there are also intercepting ditches arranged parallel to it. The bottom surface of the intercepting ditch is made of concrete to form a concrete cushion layer. The concrete cushion layer is provided with side walls made of gray sand bricks. The inner wall and bottom surface of the intercepting ditch are capped with cement mortar.

[0016] 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 drainage trench support structure of this utility model, by setting up foundation pits along the length of the rainwater pipe and the sewage pipe respectively, and setting up medium-coarse sand cushion layer, medium-coarse sand backfill layer and roadbed soil backfill layer from low to high in the foundation pit, avoids interference of external stress and vibration during construction on the pipeline. At the same time, steel sheet piles are set on both sides of the pipeline and steel pipes are set on the top to isolate the soil where the rainwater pipe and the sewage pipe are located, and provide additional support for the isolated soil, thereby achieving the purpose of reducing disturbance.

[0017] 2. The drainage trench support structure of this utility model effectively isolates the soil where the pipeline is located from the external construction environment by setting steel sheet piles on both sides of the pipeline and setting steel pipes on the top. At the same time, it absorbs vibration and stress by combining the medium and coarse sand cushion layer and backfill layer laid inside the foundation pit. This combination of isolation support + vibration reduction and buffer greatly reduces the disturbance of external construction activities to rainwater pipes and sewage pipes, and ensures the safety and stability of the pipeline.

[0018] 3. The water supply and drainage trench support structure of this utility model ensures high load-bearing capacity and stability through its ingenious structural design. Its steel waist beam is reinforced with I-beams, and an innovative triangular bracket connecting the steel sheet piles and the steel waist beam is added to provide additional reinforcement support for the steel waist beam. This effectively resists and transmits the heavy pressure from the top steel pipe, ensuring the sturdiness and reliability of the entire support frame.

[0019] 4. The drainage trench support structure of this utility model also includes a set of three-dimensional waterproofing and drainage measures. By setting up intercepting ditches on the ground to intercept surface water, laying waterproof geotextile on the slope of the foundation pit to prevent leakage and soil erosion, and setting up collection wells along the inside of the foundation pit to drain accumulated water in a timely manner, the adverse effects of water on the stability of the foundation pit are effectively controlled, ensuring construction safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a water supply and drainage trench support structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the top structure of a steel sheet pile for supporting and maintaining a water supply and drainage ditch, according to an embodiment of this utility model. Figure 3 This is an embodiment of the present utility model. Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 This is a front view of the steel pipe end structure of a water supply and drainage trench support structure according to an embodiment of the present invention; Figure 5 This is a top view of the steel pipe end structure of a water supply and drainage trench support structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the steel waist beam corner of a water supply and drainage ditch support structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of a steel waist beam stiffening plate structure at the corner of a water supply and drainage ditch support structure according to an embodiment of the present invention; Figure 8 This is a schematic diagram of a water collection well structure of a water supply and drainage trench support structure according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of a drainage ditch structure according to an embodiment of the present invention.

[0021] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-steel sheet pile, 2-rainwater pipe, 3-sewage pipe, 4-medium-coarse sand cushion layer, 5-medium-coarse sand backfill layer, 6-subgrade soil backfill layer, 7-steel waist beam, 701-steel waist beam end plate, 702-I-beam, 703-end plate, 8-steel pipe, 801-steel boot plate, 802-steel pipe end plate, 9-support, 10-stiffening plate, 11-sump well, 12-intercepting ditch. Detailed Implementation

[0022] 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.

[0023] In municipal pipelines, rainwater pipe 2 and sewage pipe 3 are often installed in the same direction at different heights. In this case, it is necessary not only to support and protect the pipelines around them, but also to support the different pipelines separately and ensure that they do not interfere with each other. Furthermore, the excavation section of the pipeline trench is mainly located in a layer of miscellaneous fill soil, with a deep layer of alternating silty clay and clay underneath. During construction, the stress and vibration generated by machinery cause significant interference, which can be transmitted through the soil layer to the pipeline, causing damage.

[0024] like Figure 1-3 As shown, this utility model embodiment provides a drainage ditch support structure, including: steel sheet piles 1 on both sides of the distribution direction of rainwater pipe 2 and sewage pipe 3, a steel pipe 8 between the two steel sheet piles 1, the steel pipe 8 being located above the rainwater pipe 2 and sewage pipe 3, and the two ends of the steel pipe 8 being fixedly connected to the steel sheet piles 1 by steel waist beams 7. A trapezoidal rainwater pipe foundation pit is excavated along the length of the rainwater pipe 2, a medium-coarse sand cushion layer 4 is laid at the bottom of the rainwater pipe foundation pit, a medium-coarse sand backfill layer 5 is provided above the medium-coarse sand cushion layer 4, and a roadbed soil backfill layer 6 is backfilled on the medium-coarse sand backfill layer 5. A trapezoidal sewage pipe foundation pit is excavated along the length of the sewage pipe 3, a medium-coarse sand cushion layer 4 is laid at the bottom of the sewage pipe foundation pit, a medium-coarse sand backfill layer 5 is provided above the medium-coarse sand cushion layer 4, and a roadbed soil backfill layer 6 is backfilled on the medium-coarse sand backfill layer 5. By setting up foundation pits along the length of rainwater pipe 2 and sewage pipe 3, and setting up medium-coarse sand cushion layer 4, medium-coarse sand backfill layer 5, and roadbed soil backfill layer 6 from low to high in the foundation pits, the interference of external stress and vibration during construction on the pipelines is avoided. At the same time, steel sheet piles 1 are set on both sides of the pipelines and steel pipes 8 are set at the top to isolate the soil where rainwater pipe 2 and sewage pipe 3 are located, and to provide additional support for the isolated soil, thereby reducing disturbance.

[0025] The bottom end of the sheet pile 1 extends downward into the soil layer, and the upper end is located below the ground. The upper end of the sheet pile 1 is also provided with a trapezoidal cross-section foundation pit.

[0026] The steel girders 7 include steel girders end plates 701 fixed to the sheet piles 1, which are arranged on the inner side of the sheet piles 1 along the pipeline laying direction. Two rows of I-beams 702 are provided on the side of the steel girders end plates 701, equidistantly arranged along the length of the steel girders end plates 701. One end of each I-beam 702 is fixed to the steel girders end plates 701, and the other end is fixed to a head plate 703. That is, the head plate 703 and the steel girders end plates 701 are respectively located at both ends of the I-beams 702, connecting them and enhancing the load-bearing capacity of the steel girders 7.

[0027] A support 9 is also provided below the steel waist beam 7 to provide reinforced support. The support 9 is a triangular frame structure, which includes a horizontal plate and a vertical plate. A diagonal brace is provided between the horizontal plate and the vertical plate. The horizontal plate is welded and fixed to the steel waist beam end plate 701 and the end plate 703. The vertical plate is welded and fixed to the steel sheet pile 1. The diagonal brace is provided between the horizontal plate and the vertical plate to provide stable support.

[0028] Multiple supports 9 are provided, equidistantly arranged along the length of the sheet pile 1, with each support 9 positioned midway between two adjacent steel waist beams 7. The end plates 701 and end caps 703 of the steel waist beams are simultaneously welded to the cross plates of the supports 9, thereby resisting the heavy pressure exerted on the steel pipe 8.

[0029] like Figure 4 , 5 As shown, the steel pipe 8 is a round steel pipe with steel pipe end plates 802 at both ends for sealing. The steel pipe end plates 802 are welded and fixed to the end plate 703. The end of the steel pipe 8 is also provided with a steel shoe plate 801 along its circumference. The steel shoe plate 801 connects the steel pipe 8 and the steel pipe end plate 802 to reinforce the connection between the two.

[0030] like Figure 6 , 7 As shown, since the rainwater pipe 2 and the sewage pipe 3 are not both straight, there are corners. Therefore, the steel sheet pile 1 also has corners. At these corners, the steel waist beam 7 is provided with multiple stiffening plates 10 to reinforce the corner connection.

[0031] The pit sidewalls of the rainwater pipe 2 and sewage pipe 3 are slopes, and waterproof geotextile is installed on the slopes and fixed with short soil nails.

[0032] like Figure 8 As shown, a water collection well 11 is also provided below the foundation pit of the rainwater pipe 2 and the sewage pipe 3, and the water collection well 11 is arranged at intervals along the length of the foundation pit.

[0033] like Figure 9 As shown, on both sides of the steel sheet pile 1, there are also intercepting ditches 12 arranged parallel to it. The bottom surface of the intercepting ditches 12 is made of concrete to form a concrete cushion layer. The concrete cushion layer is provided with side walls made of gray sand bricks. The inner wall and bottom surface of the intercepting ditches 12 are provided with cement mortar capping.

[0034] 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 drainage trench support structure, characterized by, include: Sheet piles (1) are installed on both sides of the distribution direction of rainwater pipe (2) and sewage pipe (3). A steel pipe (8) is provided between the sheet piles (1) on both sides. The steel pipe (8) is located above the rainwater pipe (2) and sewage pipe (3). The two ends of the steel pipe (8) are fixedly connected to the sheet piles (1) by steel waist beams (7). A trapezoidal rainwater pipe foundation pit is dug along the length of the rainwater pipe (2). A medium-coarse sand cushion layer (4) is laid at the bottom of the rainwater pipe foundation pit. A medium-coarse sand backfill layer (5) is laid above the medium-coarse sand cushion layer (4), and a roadbed soil backfill layer (6) is backfilled on the medium-coarse sand backfill layer (5). The sewage pipe (3) has a trapezoidal sewage pipe pit dug along its length. A medium-coarse sand cushion layer (4) is laid at the bottom of the sewage pipe pit. A medium-coarse sand backfill layer (5) is provided above the medium-coarse sand cushion layer (4), and a roadbed soil backfill layer (6) is backfilled on the medium-coarse sand backfill layer (5).

2. A drainage channel support structure according to claim 1, wherein The bottom end of the sheet pile (1) extends downward to the depth of the soil layer, and the upper end is located below the ground. The upper end of the sheet pile (1) is also provided with a trapezoidal cross-section foundation pit.

3. A drainage channel support structure according to claim 2, wherein, The steel waist beam (7) includes a steel waist beam end plate (701) fixed to the steel sheet pile (1), which is set on the inner side of the steel sheet pile (1) along the laying direction of the pipeline; The steel waist beam end plate (701) has two rows of I-beams (702) on its side. The I-beams (702) are arranged at equal intervals along the length of the steel waist beam end plate (701). One end of the I-beams (702) is fixed to the steel waist beam end plate (701), and the other end is fixed to a head plate (703). That is, the end plate (703) and the steel waist beam end plate (701) are respectively located at both ends of the I-beam (702).

4. A drainage channel support structure according to claim 3, wherein, The steel waist beam (7) is also provided with a bracket (9) below it, which provides reinforcement support. The bracket (9) is a triangular frame structure, which includes a horizontal plate and a vertical plate. A diagonal brace is provided between the horizontal plate and the vertical plate. The horizontal plate is welded and fixed to the steel waist beam end plate (701) and the end plate (703). The vertical plate is welded and fixed to the steel sheet pile (1). The diagonal brace is provided between the horizontal plate and the vertical plate.

5. A drainage channel support structure according to claim 4, wherein, Multiple supports (9) are provided and are equidistantly arranged along the length direction of the steel sheet pile (1), and each support (9) is located in the middle position between two adjacent steel waist beams (7); The steel waist beam end plate (701) and the end plate (703) are simultaneously welded to the cross plate of the bracket (9).

6. A drainage channel support structure according to any one of claims 1-5, wherein, The steel pipe (8) is a round steel pipe with steel pipe end plates (802) at both ends for sealing. The steel pipe end plates (802) are welded and fixed to the end plate (703). The end of the steel pipe (8) is also provided with a steel boot plate (801) along its circumference. The steel boot plate (801) connects the steel pipe (8) and the steel pipe end plate (802) to reinforce the connection between the two.

7. A drainage channel support structure according to any one of claims 1 to 5, wherein, At the corner of the sheet pile (1), the steel waist beam (7) is provided with multiple stiffening plates (10) to reinforce the corner connection.

8. A drainage channel support structure according to any one of claims 1-5, wherein, The pit sidewalls of the rainwater pipe (2) and sewage pipe (3) are slopes, and waterproof geotextile is provided on the slopes and fixed with short soil nails.

9. A drainage channel support structure according to any one of claims 1-5, wherein, The rainwater pipe (2) and sewage pipe (3) are also provided with water collection wells (11) below the foundation pit, and the water collection wells (11) are arranged at intervals along the length of the foundation pit.

10. A drainage channel support structure according to any one of claims 1-5, wherein, On both sides of the sheet pile (1), there is a water interception ditch (12) set parallel to it. The bottom surface of the water interception ditch (12) is made of concrete to form a concrete cushion layer. The concrete cushion layer is provided with a side wall made of gray sand bricks. The inner wall and bottom surface of the water interception ditch (12) are provided with cement mortar capping.

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