Pipe ditch backfilling construction method

Abstract

The invention belongs to the technical field of earthwork construction, and discloses a pipe ditch backfilling construction method. The pipe ditch backfilling construction method comprises the steps that S1, a pipe ditch is excavated; s2, lowering a pipe culvert into the pipe ditch, and enabling a top opening of the pipe culvert to deviate from the ditch bottom of the pipe ditch; s3, lowering the pipeline into the pipe culvert through the top opening; s4, the space between the pipe culvert and the pipeline is filled with a filling material, and the filling material submerges the pipeline and is flush with the top opening of the pipe culvert; and S5, a cover plate is placed on the pipe culvert, and a top opening of the pipe culvert is sealed and covered. The pipe ditch backfilling construction method is used for laying a pipeline, the load of a building foundation can be effectively conducted, and damage to the pipeline is avoided; and the pipe culvert and the filling material can stably support the pipeline, and settlement and deformation of the pipeline can be reduced, so that the later use reliability of the pipeline is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline laying, in particular to a pipe trench backfilling construction method. Background Art

[0002] Currently, in the trench backfilling project of buried pipelines, the suspended sections of the pipelines are mostly filled with fine soil or sand and gravel. However, the structure of fine soil and sand and gravel is relatively loose, and it is often difficult to compact them during trench backfilling, thus causing problems such as pipeline settlement and local deformation. At the same time, in buried pipeline projects, it is inevitable that the foundation of the building above will occupy the pressure. In this case, the local force on the pipeline increases, further increasing the risk of pipeline damage.

[0003] Therefore, it is urgent to design a trench backfilling method to solve the above problems existing in the prior art. Summary of the Invention

[0004] The object of the present invention is to provide a trench backfill construction method that can effectively transmit loads, avoid local damage to pipelines, and reduce pipeline settlement.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Trench backfill construction method, including:

[0007] S1. Excavate the trench;

[0008] S2, lowering a culvert into the trench, with the top opening of the culvert facing away from the trench bottom;

[0009] S3, lowering the pipe into the culvert through the top opening;

[0010] S4, filling the space between the culvert and the pipeline with filling material, so that the filling material covers the pipeline and is flush with the top opening of the culvert

[0011] S5. Placing a cover plate on the pipe culvert to seal the top opening of the pipe culvert.

[0012] Preferably, after step S5, the method further includes:

[0013] Backfill the trench with earth and compact it so that the earth covers the cover plate.

[0014] Preferably, when backfilling the earth, a warning tape is buried above the cover plate.

[0015] Preferably, after step S1, the method further includes:

[0016] A sand and gravel cushion layer is laid at the bottom of the trench.

[0017] Preferably, the filling material is air bubble mixed with lightweight soil.

[0018] Preferably, before step S4, the method further includes:

[0019] Baffles are installed at both ends of the pipe culvert along the length direction.

[0020] Preferably, before installing baffles at both ends of the pipe culvert along the length direction, the method further includes:

[0021] The pipeline is padded away from the bottom of the culvert to create a filling space between the pipeline and the bottom of the culvert.

[0022] Preferably, a lifting ring is provided on the pipe culvert.

[0023] Preferably, a hanging ring is provided on the cover plate.

[0024] Preferably, a limiting groove is provided on the side wall of the culvert, and both ends of the cover plate along the width direction are respectively limited and clamped in the limiting groove.

[0025] The beneficial effects of the present invention are:

[0026] The trench backfill construction method provided by the present invention first places the culvert into the excavated trench, and makes the opening of the culvert face away from the bottom of the trench, so as to facilitate the subsequent placement of the pipeline into the culvert; after the pipeline is placed in the culvert, the space between the pipeline and the culvert will be filled with filling material, and the filling material will not cover the pipeline, so that the filling material can fix the pipeline in the culvert in all directions, preventing the pipeline from displacement or rotation, thereby greatly improving the stability of the pipeline, and at the same time the filling material can effectively support the pipeline and reduce the settlement of the pipeline; because a cover plate is finally placed on the culvert, the cover plate presses on the filling material and seals the opening of the culvert, the cover plate and the filling material cooperate to effectively transmit the load of the upper building foundation and evenly distribute the pressure, thereby avoiding damage to the pipeline due to excessive local force. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a cross-sectional view of a pipe trench after the pipe trench is backfilled according to a specific embodiment of the present invention;

[0028] Figure 2 It is a cross-sectional view of a pipeline and a culvert provided in a specific embodiment of the present invention.

[0029] In the picture:

[0030] 100-pipe trench;

[0031] 200-pipeline;

[0032] 300-Earthwork;

[0033] 400-Warning tape;

[0034] 500-sand and gravel cushion;

[0035] 1- pipe culvert;

[0036] 2-Filling material;

[0037] 3-cover plate;

[0038] 4- Rings. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0040] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0043] like Figures 1 to 2As shown, the present invention provides a trench backfill construction method, which includes: S1, excavating a trench 100; S2, lowering a culvert 1 into the trench 100, with the top opening of the culvert 1 facing away from the bottom of the trench 100; S3, lowering a pipeline 200 into the culvert 1 through the top opening; S4, filling a filling material 2 into the space between the culvert 1 and the pipeline 200, with the filling material 2 covering the pipeline 200 and being flush with the top opening of the culvert 1; S5, placing a cover plate 3 on the culvert 1 to seal the top opening of the culvert 1.

[0044] In this embodiment, the culvert 1 is first lowered into the excavated trench 100, with the opening of the culvert 1 facing away from the bottom of the trench 100, so as to facilitate the subsequent placement of the pipe 200 into the culvert 1. After the pipe 200 is placed into the culvert 1, the space between the pipe 200 and the culvert 1 is filled with the filling material 2, and the filling material 2 submerges the pipe 200. Therefore, the filling material 2 can fully fix the pipe 200 in the culvert 1, preventing the pipe 200 from displacement or rotation, thereby greatly improving the stability of the pipe 200. At the same time, the filling material 2 can effectively support the pipe 200 and reduce the settlement of the pipe 200. Finally, a cover plate 3 is placed on the culvert 1, pressing against the filling material 2 and sealing the opening of the culvert 1. The cover plate 3 and the filling material 2 cooperate to effectively transmit the load of the building foundation above and evenly distribute the pressure, thereby preventing the pipe 200 from being damaged due to excessive local force.

[0045] Specifically, the culvert 1 is a prefabricated reinforced concrete structure with a rectangular trough shape. It has a top opening for hanging the pipe 200. The culvert 1 also has openings at both ends along its length. The pipe 200 is placed in the culvert 1, and the two ends of the pipe 200 along its length extend out of the culvert 1 to facilitate connection between the two ends of the pipe 200 and the pipe sections on both sides. The filling material 2 fills the entire space between the culvert 1 and the pipe 200, and the upper surface of the filling material 2 is flush with the top opening of the culvert 1. When the cover plate 3 is used to cover the top opening, the cover plate 3 presses against the filling material 2, so that the culvert 1 and the filling material 2 can be evenly stressed. It can be understood that this trench backfill construction method is mainly used for local pipe sections located below the building foundation, and the length of the culvert 1 is determined according to the influence range of the building foundation.

[0046] Furthermore, if Figure 1As shown, after step S5, the process further includes backfilling soil 300 into trench 100 and compacting it so that soil 300 covers cover plate 3. Specifically, after the pipe 200 is installed and buried, soil 300 is used to bury the culvert 1 and cover plate 3, and trench 100 is backfilled to the depth of the building foundation, thereby facilitating subsequent construction of the building foundation. In this embodiment, backfilling soil 300 is performed in layers and compacted to ensure that each layer of soil 300 is no thicker than 300 mm and has a compaction coefficient of no less than 0.96, thereby ensuring stable support for the building foundation above.

[0047] In order to avoid damage to the pipeline 200 during the subsequent excavation of the trench 100, Figure 1 As shown, when backfilling the earth 300, a warning tape 400 is buried above the cover plate 3; specifically, the warning tape 400 is a protective reminder device commonly used in this field, mostly made of polymer materials such as OPP, PE or PP, and is usually buried 30cm-50cm above the pipeline 200. It is brightly colored and eye-catching to serve as a warning to construction workers.

[0048] like Figure 1 As shown, after step S1, the following further includes: laying a gravel cushion layer 500 at the bottom of the trench 100. The gravel cushion layer 500 can disperse the load of the culvert 1 above and prevent the soil layer at the bottom of the trench 100 from becoming soft and deformed, causing the culvert 1 to sink. In this embodiment, the gravel cushion layer 500 is made of sand and stone mixed in a certain proportion. Before laying the gravel cushion layer 500, the construction workers first drain the accumulated water in the trench 100 and clean the hard stones at the bottom of the trench 100. Then, the gravel cushion layer 500 is laid at the bottom of the trench 100 and compacted. The thickness of the gravel cushion layer 500 is 300 mm and the compaction coefficient is not less than 0.97.

[0049] Specifically, the filling material 2 is bubble-mixed lightweight soil, which is a geotechnical material commonly used in this field. It is a lightweight engineering material with a large number of closed pores formed by a mechanical foaming and curing process with a cement base as the main body. The bubble-mixed lightweight soil before curing has high fluidity and can quickly fill the gap between the pipeline 200 and the culvert 1 without the aid of other mechanical equipment. After curing, it can form a tight wrapping and support for the pipeline 200, solving the problem that the filling material 2 between the pipeline 200 and the culvert 1 is difficult to compact due to limited space.

[0050] To prevent the filling material 2 from overflowing from the side openings at both ends of the culvert 1 during pouring, the process, prior to step S4, also includes installing baffles at both ends of the culvert 1 along its length. Specifically, before pouring the filling material 2 into the space between the culvert 1 and the pipeline 200, the baffles are used to block the two side openings along its length to prevent the filling material 2 from overflowing. The baffles are then removed after the filling material 2 solidifies.

[0051] like Figure 1 As shown, to ensure that the filling material 2 fully envelops the pipe 200, before installing the baffles at both ends of the culvert 1 along its length, the following steps are performed: The pipe 200 is padded away from the bottom of the culvert 1 to create a filling space between the pipe 200 and the bottom of the culvert 1. In this embodiment, the length of the pipe 200 is greater than the length of the culvert 1. After the pipe 200 is lowered into the culvert 1, both ends of the pipe 200 extend out of the culvert 1. Construction workers then padded the ends of the pipe 200 outside the culvert 1 to raise the pipe 200 above the bottom of the culvert 1. At this point, the pipe 200 is suspended in the culvert 1. Filling material 2 is then poured into the culvert 1 to ensure that the filling material 2 can fill the space between the pipe 200 and the culvert 1 tightly.

[0052] Specifically, before placing the pipe 200 into the culvert 1, the construction workers first place pads on the outside of the two ends of the culvert 1 along the length direction, and then lower the pipe 200 into the culvert 1. The pipe 200 extends out of the two ends of the culvert 1 and falls on the pads, so that there is a filling space between the pipe 200 and the bottom of the culvert 1; thereafter, the construction workers pass a baffle with a through hole through the pipe 200, and temporarily fix the baffle at the end of the culvert 1 to seal the side opening of the culvert 1 along the length direction; then the construction workers pour bubble mixed lightweight soil into the culvert 1. Since the bubble mixed lightweight soil has good fluidity, the bubble mixed lightweight soil can quickly fill the gap between the culvert 1 and the pipe 200. When the bubble mixed lightweight soil is poured to the top opening of the culvert 1, the pouring is stopped; after the pouring is completed, the bubble mixed lightweight soil is cured, and after it is completely solidified, the baffles at both ends of the culvert 1 and the pads under the pipe 200 can be removed.

[0053] In order to improve the convenience during construction, Figure 2 As shown, a lifting ring 4 is provided on the pipe culvert 1 and a lifting ring 4 is provided on the cover plate 3. Therefore, when the pipe culvert 1 and the cover plate 3 are lowered, the lifting equipment can be used to lift the pipe culvert 1 and the cover plate 3 through the lifting ring 4, which greatly facilitates the construction.

[0054] like Figure 2As shown, a limiting groove is provided on the side wall of the culvert 1, and the two ends of the cover plate 3 along the width direction are respectively limited and clamped in the limiting groove, so that the culvert 1 can limit the cover plate 3 to prevent the cover plate 3 from shifting under the action of external force; specifically, the limiting groove is opened on the side walls on both sides of the culvert 1 along the length direction of the culvert 1, and the cross-section of the limiting groove is L-shaped. The two ends of the cover plate 3 along the width direction can respectively abut against the side plates of the limiting groove on both sides, thereby preventing the cover plate 3 from moving along the width direction.

[0055] This trench backfill construction method buries the pipeline 200 in the culvert 1 and uses the filling material 2 to fully cover and support the pipeline 200, which can effectively transmit the load of the building foundation and avoid damage to the pipeline 200; and the culvert 1 and the filling material 2 can provide stable support for the pipeline 200, which can reduce the settlement and deformation of the pipeline 200, thereby ensuring the reliability of the pipeline 200 in later use.

[0056] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A trench backfill construction method, characterized in that: include: S1, excavating a pipe trench (100); S2, lowering the pipe culvert (1) into the pipe trench (100), and making the top opening of the pipe culvert (1) face away from the bottom of the pipe trench (100); S3, lowering the pipe (200) into the culvert (1) through the top opening; S4, filling the space between the culvert (1) and the pipeline (200) with a filling material (2), so that the filling material (2) covers the pipeline (200) and is flush with the top opening of the culvert (1); S5. Place a cover plate (3) on the pipe culvert (1) to seal the top opening of the pipe culvert (1).

2. The trench backfill construction method according to claim 1, characterized in that: After step S5, the following steps are also included: The soil (300) is backfilled into the pipe trench (100) and compacted so that the soil (300) covers the cover plate (3).

3. The trench backfill construction method according to claim 2, characterized in that: When backfilling the earthwork (300), a warning tape (400) is buried above the cover plate (3).

4. The trench backfill construction method according to claim 1, characterized in that: After step S1, the following steps are also included: A sand and gravel cushion layer (500) is laid at the bottom of the pipe trench (100).

5. The trench backfill construction method according to claim 1, characterized in that: The filling material (2) is air bubble mixed with light soil.

6. The trench backfill construction method according to claim 1, characterized in that: Before step S4, the following steps are also included: Baffles are installed at both ends of the pipe culvert (1) along the length direction.

7. The trench backfill construction method according to claim 6, characterized in that: Before installing baffles at both ends of the pipe culvert (1) along the length direction, the method further comprises: The pipeline (200) is padded away from the bottom of the pipe culvert (1), so that a filling space is generated between the pipeline (200) and the bottom of the pipe culvert (1).

8. The trench backfill construction method according to any one of claims 1 to 7, characterized in that: The pipe culvert (1) is provided with a lifting ring (4).

9. The trench backfill construction method according to any one of claims 1 to 7, characterized in that: A hanging ring (4) is provided on the cover plate (3).

10. The trench backfill construction method according to any one of claims 1 to 7, characterized in that: A limiting groove is provided on the side wall of the pipe culvert (1), and both ends of the cover plate (3) along the width direction are respectively limited and clamped in the limiting groove.

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