Protection device for underneath pass pipeline construction

Abstract

The utility model discloses a protection device for underneath pass pipeline construction, and belongs to the technical field of water conservancy projects. Comprising support first-stage concrete poured at the lower end of a to-be-protected pipeline after the two ends of the to-be-protected pipeline are excavated, bottom longitudinal beams arranged above the support first-stage concrete in the axial direction of the pipeline, bottom cross beams arranged above the bottom longitudinal beams and used for supporting the pipeline, and steel base plates arranged above the bottom cross beams and used for leveling. According to the utility model, a set of firm and fully-coated pipeline protection system is formed, and excavation below the protected pipeline and other construction operations can be carried out after completion; the conditions of sedimentation, pipeline damage and the like caused by excavation below the pipeline are effectively avoided; particularly, when multiple sections of socket pipes exist in an existing pipeline and excavation is conducted below the pipeline, the pipeline is firmly protected, the bearing capacity is large, and the rigidity is high.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, and in particular to a protective device for underground pipeline construction. Background Technology

[0002] Water conservancy projects are engineering projects used to control and regulate surface water and groundwater in nature to achieve the purpose of eliminating harm and promoting benefits. Water conservancy projects require the use of a large number of pipelines; for some pipelines that are directly exposed or have special features, they need to be protected by pipeline protection devices.

[0003] For example, patent application number 2019221668764 proposes a water conservancy pipeline protection device. It features a lower arc-shaped cover connected to an upper arc-shaped cover on one side. The inner cavity of the arc-shaped cover is connected to a protective cover via a rotating shaft. The inner wall of the protective cover is lined with a flexible pad, and the inner wall of the flexible pad is lined with an anti-slip pad, ensuring good protection for the pipeline when placed inside the protective cover. Patent application number 2023203511770 proposes a water conservancy pipeline protection device, including a first telescopic protective frame and a second telescopic protective frame, which are fixed together by bolts.

[0004] The aforementioned solution involves adding a protective sleeve to the pipeline to prevent problems such as compression, collision, or corrosion caused by the natural environment, thereby increasing the pipeline's service life. However, there is currently no suitable publicly available technology for protecting existing pipelines above them during underground pipeline construction.

[0005] During the construction of underground pipelines, excavation is required beneath the pipeline, which inevitably leads to settlement and pipeline damage. This is especially true when existing pipelines have multiple socket sections; during excavation beneath the pipeline, the socket sections lose support and are prone to detachment and damage.

[0006] To prevent settlement, deformation, or even damage to pipelines during construction beneath them, the applicant has designed a protective device for pipeline construction based on construction experience and practical needs. Utility Model Content

[0007] The purpose of this utility model is to solve the above-mentioned problems in the prior art by proposing a protective device for underground pipeline construction.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A protective device for underpass construction includes: a first-stage concrete support poured at the lower end of the pipe after excavation at both ends of the pipe to be protected; a bottom longitudinal beam arranged along the pipe axis above the first-stage concrete support; a bottom transverse beam arranged above the bottom longitudinal beam to provide support for the pipe; and a steel pad arranged above the bottom transverse beam for leveling.

[0010] In some embodiments, the bottom longitudinal beam and the bottom transverse beam are made of I-beams.

[0011] In some embodiments, the bottom longitudinal beams are installed after the excavation of the pipe is completed on both sides;

[0012] After the bottom crossbeam is excavated section by section, the pipeline is laid underneath it.

[0013] In some embodiments, when the pipeline to be protected is a socket pipe, the first phase of concrete for the support is poured at the middle position of the socket pipe section.

[0014] In some embodiments, the system further includes: angle steels arranged along the axial direction of the pipe above the bottom crossbeam and located on both sides of the pipe; the side or top surface of the angle steels abuts against the pipe.

[0015] In some embodiments, a rubber strip is attached to the inside of the angle steel.

[0016] In some embodiments, it further includes: side columns that are vertically fixed above the bottom longitudinal beam or bottom transverse beam and located on both sides of the pipe.

[0017] In some embodiments, the side columns are arranged on both sides of the pipe, with multiple columns spaced apart along the pipe axis to form a row; diagonal bracing is provided between adjacent side columns.

[0018] In some embodiments, a top longitudinal beam extending along the pipe axis is fixed to the top of the side column and connected to the tops of all the side columns on one side of the pipe.

[0019] In some embodiments, a top crossbeam is fixed above or inside the top longitudinal beam;

[0020] The lower end of the top crossbeam is not lower than the top end of the pipe.

[0021] In some embodiments, it further includes: second-stage concrete for the support, which is poured on top of the first-stage concrete of the support and covers the pipe and the bottom longitudinal beam.

[0022] Compared with the prior art, the present invention provides a protective device for underground pipeline construction, which has the following beneficial effects.

[0023] 1. This utility model forms a robust and fully enclosed pipeline protection system, which allows for excavation and other construction work below the protected pipeline immediately after completion; it effectively avoids settlement and pipeline damage caused during excavation below the pipeline; especially when there are multiple socket pipes in the existing pipeline, it provides robust protection for the pipeline during excavation below the pipeline, with high load-bearing capacity and strong rigidity.

[0024] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the end structure of this utility model.

[0026] Figure 2 This is a side view of the present invention.

[0027] Figure 3 This is a construction flowchart of this utility model.

[0028] Figure 4 This is a schematic diagram of the intersecting section.

[0029] Figure 5 This is a schematic diagram of the longitudinal section of the intersection.

[0030] Figure 6 This is an elevation view of the pipe bracket foundation.

[0031] Figure 7 This is a schematic diagram of the foundation plan for the pipe bracket.

[0032] In the picture:

[0033] 1. First-stage concrete for the support; 2. Bottom longitudinal beam; 3. Bottom transverse beam; 4. Steel pad; 5. Angle steel; 6. Side columns; 7. Diagonal struts; 8. Top longitudinal beam; 9. Top transverse beam; 10. Second-stage concrete for the support. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] Reference Figure 1-2 A protective device for construction of underground pipelines, comprising:

[0036] After excavation at both ends of the pipeline to be protected, the first phase of concrete for the support at the lower end of the pipeline is poured.

[0037] The bottom longitudinal beam 2 is arranged along the pipeline axis above the first phase concrete 1 of the support;

[0038] Bottom crossbeam 3, which is installed above bottom longitudinal beam 2 to provide support for the pipeline;

[0039] And, a steel pad 4 is placed above the bottom crossbeam 3 for leveling.

[0040] Among them, the bottom longitudinal beam 2, the bottom transverse beam 3, and the steel pad 4 are fixed by welding or bolt connection; the bottom longitudinal beam 2 is fixed to the first-stage concrete 1 of the support by expansion bolts, pre-embedded steel bars, etc.

[0041] Preferably, the bottom longitudinal beam 2 and the bottom transverse beam 3 are made of I-beams or channel steel to form reliable support strength.

[0042] in:

[0043] The bottom longitudinal beams 2 are laid out after the pipeline is excavated on both sides;

[0044] After the bottom crossbeam 3 is excavated in sections, the pipeline is laid underneath.

[0045] When excavating on both sides of the pipeline, the pipeline and the soil at the bottom of the pipeline must not be disturbed.

[0046] It is important to note that:

[0047] When the pipeline to be protected is a socket pipe, select the middle position of the socket pipe section and excavate and pour the first phase of concrete for the support; so as to form an effective and reliable support for the socket section.

[0048] In some embodiments, it further includes: angle steel 5 arranged along the pipe axis above the bottom crossbeam 3 and located on both sides of the pipe.

[0049] Correspondingly, the side or top surface of angle steel 5 contacts the pipe to prevent the pipe from shifting to either side.

[0050] Furthermore, rubber strips are attached to the inside of angle steel 5 to avoid hard contact and to provide tighter support.

[0051] In some embodiments, it further includes: side columns 6 vertically fixed above the bottom longitudinal beam 2 or the bottom transverse beam 3 and located on both sides of the pipe; forming a side protection structure.

[0052] Preferably, the side columns 6 are made of I-beams; multiple columns are arranged at intervals along the axial direction of the pipe on both sides to form a row; depending on the design spacing, they are selected to be welded to the bottom longitudinal beam 2 or the bottom transverse beam 3; and the tops of all the side columns 6 are flush.

[0053] Furthermore, diagonal bracing rods 7 are installed between adjacent side columns 6 to enhance structural strength and stability.

[0054] Among them, the diagonal strut 7 can be made of I-beams or angle steel.

[0055] It should be noted that the side columns 6 and the diagonal braces 7 can be installed simultaneously, or any one of them can be selected; both can form an effective side support.

[0056] In some embodiments, a top longitudinal beam 8 extending along the pipe axis is fixed to the top of the side column 6; the top longitudinal beam 8 is connected to the top of all the side columns 6 on one side of the pipe to enhance the stability and strength of the side structure.

[0057] Among them, the top longitudinal beam 8 is made of I-beam.

[0058] Furthermore, a top crossbeam 9 is fixed above or inside the top longitudinal beam 8; together they form a complete protective system surrounding the pipeline.

[0059] It should be noted that the lower end of the top beam 9 is not lower than the top of the pipe.

[0060] The top crossbeam 9 is made of channel steel or I-beam.

[0061] In some embodiments, it further includes: second-stage concrete 10 of the support, which is poured on top of the first-stage concrete 1 of the support and covers the pipe and the bottom longitudinal beam 2.

[0062] It should be noted that the second-stage concrete of the support does not need to completely cover the pipe; the pouring height only needs to reach the middle of the pipe; the specific design should be based on the construction site environment.

[0063] Reference Figure 3 The construction steps of this application are as follows.

[0064] 1) Casting of supports at both ends of the pipeline

[0065] First, excavation is carried out at both ends of the pipeline to be protected;

[0066] If the pipe to be protected is a socket pipe, then the middle position of the socket pipe section is selected as the pipe support position;

[0067] After the excavation is completed, concrete is poured up to the bottom of the longitudinal I-beam, forming the first phase of the support concrete 1.

[0068] 2) Excavation on both sides of the pipeline

[0069] Manual excavation was carried out on both sides of the pipeline;

[0070] The pipeline and the soil at the bottom of the pipeline must not be disturbed during the excavation process;

[0071] Excavate both sides of the pipeline to the bottom of the bottom longitudinal channel steel (bottom longitudinal beam).

[0072] 3) Place the bottom longitudinal beam

[0073] Place two bottom longitudinal channel steels or I-beams onto the concrete supports at both ends and level them; leveling can be achieved by welding thin steel plates to the bottom longitudinal beams.

[0074] 4) Weld the bottom transverse I-beams, base plates, and angle steel as excavation progresses.

[0075] The pipeline to be protected is excavated from one end of the support to the other. Every 30-70cm of the excavated pipeline, the bottom transverse H-beam (bottom beam) is inserted into the bottom of the pipeline (at this time, there is a small gap between the bottom transverse H-beam and the pipeline), and welded to the bottom longitudinal H-beam (bottom longitudinal beam). The gap between the transverse H-beam and the pipeline is filled with a pad to make it tight. An angle steel is placed on each side of the pipeline and welded to the bottom transverse H-beam. The angle steel is used to stabilize the pipeline and prevent the pipeline from shifting to the sides.

[0076] 5) Welding vertical and diagonal I-beams

[0077] After each section of the pipeline is excavated and the bottom horizontal I-beams, base plates, and angle steel are completed, the vertical I-beams (side columns) are welded together, and the two vertical I-beams are welded together with the diagonal I-beams (diagonal struts). The diagonal I-beams, together with the bottom longitudinal I-beams and the vertical I-beams, form a stable triangular structure.

[0078] 6) Continue repeating steps 4-5 until the entire pipeline support is completed.

[0079] 7) Weld the top longitudinal I-beams (top longitudinal beams) and the top transverse channel steel (top transverse beams).

[0080] Place the top longitudinal H-beams on both sides of the pipe onto the vertical H-beams, level them, and weld them securely. Then, place the top transverse channel steel onto the top longitudinal H-beams and weld them together. This forms a robust support and protection system that encloses the pipe.

[0081] 8) Second-stage concrete pouring for the bearing

[0082] Roughen the concrete of the support and pour concrete onto the top channel steel.

[0083] This completes the protection device for the entire pipeline.

[0084] Upon completion, this utility model forms a robust, fully enclosed pipeline protection system, allowing for excavation beneath the protected pipeline and subsequent construction work. Compared to traditional pipeline protection devices that only buffer and protect against minor impacts and extend the pipeline's lifespan, this utility model effectively prevents settlement and pipeline damage during excavation beneath the pipeline. Especially when existing pipelines have multiple socket sections, it provides robust protection with high load-bearing capacity and rigidity during excavation.

[0085] Reference Figure 4-7 This system was applied to the northern trunk pipeline project of a certain engineering project. At point BG0+684.778, it intersects with a water supply pipeline. According to on-site measurements, the water supply pipeline has an influence length of 16.34m on the trunk pipeline and intersects with it at an angle of 47°. The trunk pipeline is arranged in a straight line both horizontally and vertically. The water supply pipeline at this location uses PCCP pipe with a nominal inner diameter of DN=2.0 meters, a design pressure of 1.6MPa, a working pressure of 1.2MPa, and a test pressure of 1.44MPa. The water supply pipeline at this location has a diameter of 0.8m and a burial depth of approximately 2m.

[0086] The crossing method is as follows: the main north-south pipeline of the project will pass under the water supply pipeline. For example... Figure 4-7 As shown.

[0087] 1) Surveying and setting out: Based on the control stake positions given in the design, use a theodolite to set out the central axis of the pipeline and determine the central stake. Set out the edge stakes along the construction zone and mark them with lime lines. During construction, manually probe the excavation according to the designed stake positions until the location and direction of the pipeline are completely determined. Simultaneously, prepare materials and supplies such as protective supports for the water supply pipeline and temporary supports for the pipe trench.

[0088] 2) First, excavate the supports at both ends of the water supply pipeline (2*2*1.5m), and then pour C20 concrete to support the supports.

[0089] 3) Excavate both sides of the water supply pipe to the bottom. After manually excavating to the bottom of the buried water supply pipe, use I25 I-beams as crossbeam supports to support the water supply pipe. First, manually excavate a portion of the bottom of the support, then use I14 I-beams, spaced 1m apart, to connect the crossbeams. Then, use 3cm thick steel plate pads at the bottom of the water supply pipe and fix the water supply pipe horizontally on both sides with 125# angle steel; repeat the above operations to connect the crossbeams into a whole. Use 10# channel steel on both sides of the crossbeams, arranged in a zigzag pattern with a spacing of 1m, and use stiffening plates to connect the channel steel; use 10# channel steel at the top of the support, arranged in a zigzag pattern at a 45° angle with a spacing of 2m. After completing the protective steel support to ensure the safety and stability of the water supply pipe, continue manual layered excavation to the designed bottom elevation of the pipe trench. During the excavation process, use steel sheet piles for temporary support of the pipe trench.

[0090] 4) Use steel supports to install four I25 I-beams, two on each side of the trench; use 10# channel steel on both sides between the beams, arranged in a zigzag pattern with a spacing of 1m; use I14 I-beams at the bottom of the brackets, arranged at a spacing of 1m; use 10# channel steel at the top of the brackets, arranged in a zigzag pattern with a spacing of 2m at a 45° angle.

[0091] At the upstream and downstream locations of the intersection, the PCCP pipe is lifted using a gantry crane, ensuring the pipe end is at least 3 meters away from the water supply pipe. It is then slowly lowered into the trench to prevent the pipe from swinging and colliding with the water supply pipe. After entering the trench, the pipe is moved parallel to the installation point for installation. After installation, manual backfilling of the surrounding sand layer and soil is carried out. All steel supports of the bracket are retained, and C20 concrete is poured up to the middle of the water supply pipe (height confirmed on-site). Then, backfilling continues to cover the water supply pipe up to the original ground level, restoring the original terrain.

[0092] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0093] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A protective device for construction of underground pipelines, characterized in that, include: After excavation at both ends of the pipeline to be protected, a first-stage concrete support (1) is poured at the lower end of the pipeline, a bottom longitudinal beam (2) is arranged along the pipeline axis above the first-stage concrete support (1), a bottom transverse beam (3) is arranged above the bottom longitudinal beam (2) to provide support for the pipeline, and a steel pad (4) is arranged above the bottom transverse beam (3) for leveling.

2. The protective device for construction of underground pipelines according to claim 1, characterized in that, The bottom longitudinal beams (2) are laid out after the pipeline is excavated on both sides; The bottom crossbeam (3) is laid under the pipeline after the section excavation.

3. The protective device for construction of underpasses according to claim 1, characterized in that, When the pipeline to be protected is a socket pipe, the first phase of concrete for the support is poured at the middle position of the socket pipe section (1).

4. The protective device for construction of underpasses according to claim 1, characterized in that, It also includes: angle steel (5) arranged along the axial direction of the pipe above the bottom crossbeam (3) and located on both sides of the pipe; the side or top surface of the angle steel (5) abuts against the pipe.

5. The protective device for construction of underpass pipelines according to claim 4, characterized in that, A rubber strip is attached to the inside of the angle steel (5).

6. The protective device for construction of underpasses according to claim 1, characterized in that, Also includes: Side columns (6) are vertically fixed above the bottom longitudinal beam (2) or bottom transverse beam (3) and located on both sides of the pipe.

7. The protective device for construction of underpasses according to claim 6, characterized in that, The side columns (6) are arranged in a row on both sides of the pipe at intervals along the pipe axis; diagonal bracing rods (7) are provided between adjacent side columns (6).

8. The protective device for construction of underpass pipelines according to claim 7, characterized in that, The top of the side column (6) is fixed with a top longitudinal beam (8) extending along the pipe axis, which is connected to the top of all the side columns (6) on one side of the pipe.

9. The protective device for construction of underpasses according to claim 8, characterized in that, A top crossbeam (9) is fixed above or inside the top longitudinal beam (8); The lower end of the top beam (9) is not lower than the top of the pipe.

10. The protective device for construction of underground pipelines according to claim 8 or 9, characterized in that, Also includes: The second phase concrete (10) of the support is poured on top of the first phase concrete (1) of the support and covers the pipe and the top longitudinal beam (8).

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