Suspension protection structure of existing pipeline

Abstract

The utility model discloses a suspension protection structure of an existing pipeline, which can effectively protect the pipeline, reduce the disturbance of soil around the pipeline in the underground structure construction process and ensure the stability of the pipeline in the underground structure construction process under the condition that the pipeline is not migrated. The suspension protection structure comprises supporting beams, suspension beams, suspension rods, joists, supporting piles and retaining walls, a to-be-excavated construction area of the foundation pit is defined by the supporting piles, the tops of the supporting piles are connected into an integral structure through top beams, the top beams are located on a pipeline, the pipeline penetrates through the position between every two adjacent supporting piles, and the supporting beams connected with the top beams are arranged on the two sides of the pipeline respectively. The tops of the supporting beams are connected through the suspension beams, the suspension rods are arranged on the suspension beams and symmetrically distributed on the two sides of the pipeline, the suspension rods are connected through the supporting beams, an encapsulation structure is arranged in the length direction of the pipeline, the supporting beams are used for supporting the pipeline, and the retaining walls are arranged between every two adjacent supporting piles on the two sides of the pipeline. The retaining wall extends downwards from the bottom of the top beam to a foundation pit excavation base.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, in particular to a suspension protection structure of an existing pipeline. Background Art

[0002] In the process of urban construction, it is common to encounter situations where underground structures such as pipe corridors and underground roads intersect with existing underground pipelines. When constructing underground structures under existing underground pipelines, it is necessary to protect the existing underground pipelines to prevent the construction of underground structures from damaging the existing underground pipelines and affecting the normal operation of urban infrastructure. In order to prevent the construction of underground structures from affecting existing underground pipelines, the existing underground pipelines are usually relocated before the construction of underground structures, and then the proposed underground structures are open-cut. The relocation of underground pipelines will have an impact on the surrounding environment and bring inconvenience to the lives of residents. The relocation and maintenance costs are high. In cases where it is inconvenient to relocate, there are also methods such as pipe jacking for dark excavation construction, which will increase construction costs and risks.

[0003] When it is not convenient to relocate the existing underground pipelines or to carry out dark excavation construction, the in-situ suspension protection of the existing underground pipelines can reduce the impact on the surrounding environment and the risk of construction. However, the in-situ suspension protection will have the following problems: the stability of the suspension structure itself will affect the stability of the pipeline suspension. When the large-diameter pipeline (diameter not less than 800mm) is suspended in situ for protection, the suspension structure is prone to deformation and damage due to concentrated force, which affects the reliability of the suspension protection of the large-diameter pipeline; the suspension usually adopts wire rope, and the contact between the wire rope and the pipeline is easy to cause the pipeline to be damaged by concentrated force; some pipelines are concrete socket pipes, and when they are suspended for protection, they are prone to pipeline damage and pipeline leakage; during the pipeline suspension protection and soil excavation construction after suspension protection, the disturbance of the soil around the pipeline will cause the pipeline to deform, affecting the stability and reliability of the pipeline suspension protection; during the foundation pit excavation construction under the existing pipeline, the foundation pit support structure needs to be constructed to ensure the safety of the foundation pit excavation construction, and the existing pipeline will interfere with the construction of the foundation pit support structure, resulting in difficulties in the construction of the foundation pit support structure. Utility Model Content

[0004] At least one of the purposes of the present utility model is to provide a suspension protection structure for an existing pipeline in order to overcome the problems existing in the above-mentioned prior art, which can effectively protect the pipeline without relocating the pipeline, reduce the disturbance of the soil around the pipeline during the construction of the underground structure, and ensure the stability of the pipeline during the construction of the underground structure.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model includes the following aspects.

[0006] A suspension protection structure for existing pipelines, comprising: a support beam, a suspension beam, a suspension rod, a supporting beam, a retaining pile and a retaining wall. Multiple retaining piles enclose a construction area of a foundation pit to be excavated. The tops of adjacent retaining piles are connected into an integral structure through a capping beam. The capping beam is located above the pipeline. The pipeline passes through between two adjacent retaining piles. Support beams are respectively arranged on both sides of the pipeline. The bottom of the support beam is located above the capping beam. The tops of the support beams are connected through a suspension beam. The suspension rods are arranged on the suspension beam and symmetrically distributed on both sides of the pipeline. The suspension rods are connected through a supporting beam. A wrapping structure is arranged in the length direction of the pipeline. The supporting beam is used to support the pipeline. The retaining wall is arranged between two adjacent retaining piles on both sides of the pipeline. The retaining wall extends downward from the bottom of the capping beam to the base of the foundation pit excavation.

[0007] Preferably, the wrapping structure is a steel-concrete structure, and a steel bar mesh for wrapping the pipeline is arranged inside the wrapping structure.

[0008] Preferably, multiple waist beams are arranged in the height direction of the retaining wall. Each waist beam is arranged along the length direction of the retaining wall. Multiple anchor cables are fixedly connected to each waist beam. Each anchor cable passes through the retaining wall and obliquely extends into the soil around the retaining wall.

[0009] Preferably, both the waist beam and the retaining wall are steel-concrete structures, and the waist beam and the retaining wall are cast into an integral structure through concrete; the two ends of the retaining wall are connected to the retaining piles by the method of planting connecting bars, or the steel bars at the two ends of the retaining wall are welded to the main steel bars of the retaining piles.

[0010] Preferably, the support beam adopts a Bailey beam or double-rolled I-beam. When the support beam adopts a Bailey beam, the support beam includes two or more groups of Bailey sheets, and adjacent groups of Bailey sheets are connected through Bailey sheet scissors braces.

[0011] Preferably, the support beam and the capping beam are connected through embedded parts, and the support beam and the embedded parts are connected through a limiter.

[0012] Preferably, the embedded parts include embedded steel plates and anchor bolts; the limiter includes a connecting plate and a support member. The two support members are arranged oppositely on the embedded steel plate. The distance between the two support members is not less than the width of the support beam. Connecting rib plates are respectively arranged on both sides of the support beam. A chute is arranged on the connecting rib plate. One end of the connecting plate is integrally provided with a connecting boss. A connecting groove penetrating the connecting boss is arranged in the middle of the connecting boss. The connecting rib plate is connected to the connecting boss, and the connecting plate is connected to the support member.

[0013] Preferably, a polytetrafluoroethylene plate is arranged between the support beam and the embedded parts.

[0014] Preferably, the suspension beam includes two first cross beams arranged oppositely, there is a space for the suspension rod to pass through between the two first cross beams, the tops of the two first cross beams are connected by a first connecting plate, and the bottoms are connected by a second connecting plate. The first connecting plate and the second connecting plate are coaxial. Rib plates are arranged in the notch of the first cross beam, multiple rib plates are arranged along the length direction of the first cross beam, and multiple first connecting plates and multiple second connecting plates are arranged along the length direction of the first cross beam.

[0015] Preferably, multiple in-pit supports are arranged in the height direction of the retaining pile, and the in-pit support is connected to the opposite retaining pile; the suspension rod is connected to the suspension beam and the suspension rod is connected to the supporting beam through steel plate gaskets and double nuts.

[0016] In summary, due to the adoption of the above technical solutions, the present utility model has at least the following beneficial effects:

[0017] The pipeline is suspended by the support beam, the suspension beam, the suspension rod and the supporting beam, which can ensure the stability of the suspension protection structure, avoid damage to the pipeline during the suspension process, and the load generated during the pipeline suspension process is transmitted to the retaining piles on both sides of the pipeline through the support beam, the suspension beam and the capping beam. The adjacent two retaining piles on both sides of the pipeline are connected by a retaining wall, which can ensure the stability of the soil around the pipeline. During the pipeline suspension and the excavation of the foundation pit under the pipeline, the disturbance of the soil around the pipeline can be avoided, so that the pipeline is deformed, thereby effectively protecting the pipeline and ensuring the normal use of the pipeline. By arranging a wrapping structure on the pipeline, the wrapping structure wraps the pipeline, and during the pipeline suspension process, the pipeline can be effectively protected, the stiffness of the pipeline is increased, and the pipeline is prevented from being damaged.

[0018] The support beam and the capping beam are connected by embedded parts, and the support beam and the embedded parts are connected by a stopper, which can stably connect the support beam to the capping beam and improve the stability of the pipeline suspension; by arranging a polytetrafluoroethylene plate between the embedded part and the support beam, during the pipeline suspension and subsequent excavation construction process, it can play a shock-absorbing role for the pipeline and reduce the influence of the deformation of the soil and the capping beam on the stability of the pipeline suspension.

[0019] The suspension protection structure of the existing pipeline of the present utility model can effectively protect the pipeline without migrating the pipeline, realize the open excavation construction under the pipeline, and at the same time, the deformation of the existing pipeline during the construction process is small, ensuring the normal use of the pipeline; it is not only applicable to existing pipelines with large diameters and / or relatively deep burial depths (such as: the burial depth is not less than 5m), but also applicable to existing pipelines with smaller diameters and shallower burial depths, ensuring the reliability of the pipeline suspension protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the suspension protection structure of the existing pipeline of the exemplary embodiment of the present utility model.

[0021] Figure 2 It is a schematic diagram of the suspension protection structure of an existing pipeline in another exemplary embodiment of the present utility model.

[0022] Figure 3 It is a top view of the suspension protection of an existing pipeline in an exemplary embodiment of the present utility model.

[0023] Figure 4 It is a schematic diagram of the connection structure between a retaining wall and a retaining pile in an exemplary embodiment of the present utility model.

[0024] Figure 5 It is a schematic diagram of the pipeline encapsulation structure in an exemplary embodiment of the present utility model.

[0025] Figure 6 It is a schematic diagram of the suspension beam structure in an exemplary embodiment of the present utility model.

[0026] Figure 7 It is a schematic diagram of the embedded part structure in an exemplary embodiment of the present utility model.

[0027] Figure 8 It is a partial schematic diagram of the connection structure between a support beam and an embedded part in an exemplary embodiment of the present utility model.

[0028] Figure 9 It is a schematic diagram of the connecting plate structure in an exemplary embodiment of the present utility model.

[0029] Figure 10 It is a schematic diagram of the retaining wall formwork setting in an exemplary embodiment of the present utility model.

[0030] Figure 11 It is a partial schematic diagram of the connection structure between a support beam and an embedded part in another exemplary embodiment of the present utility model.

[0031] Identifications in the figure: 1 - support beam, 2 - suspension beam, 200 - first cross beam, 201 - first connecting plate, 202 - second connecting plate, 203 - rib plate, 3 - suspension rod, 4 - supporting beam, 5 - retaining pile, 6 - retaining wall, 600 - retaining wall steel bars, 601 - connecting bars, 7 - pipeline, 8 - encapsulation structure, 800 - steel mesh, 9 - waist beam, 10 - anchor cable, 11 - embedded part, 110 - embedded steel plate, 111 - anchor bolt, 12 - steel plate gasket, 13 - double nuts, 14 - capping beam, 15 - internal support in foundation pit, 16 - polytetrafluoroethylene plate, 17 - lower chord, 18 - vertical rod, 19 - connecting plate, 20 - connecting boss, 21 - support member, 22 - connecting rib plate, 23 - sliding groove, 24 - connecting groove, 25 - retaining wall formwork, 250 - vertical backing strip, 251 - horizontal backing strip, 252 - diagonal brace. Detailed implementation manners

[0032] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, so as to make the purpose, technical solution and advantages of the present utility model clearer and more understandable. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] As Figures 1 - 3 shown, the suspension protection structure of the existing pipeline in the exemplary embodiment of the present utility model includes a support beam 1, a suspension beam 2, a suspension rod 3, a supporting beam 4, a retaining pile 5 and a retaining wall 6. Among them, multiple retaining piles 5 enclose the construction area of the foundation pit to be excavated. The tops of adjacent retaining piles 5 are connected into an integral structure through a capping beam 14. The capping beam 14 is located above the pipeline 7. The pipeline 7 passes through between two adjacent retaining piles 5. Support beams 1 are respectively arranged on both sides of the pipeline 7. The bottom of the support beam 1 is located above the capping beam 14. The top of the support beam 1 is connected by a suspension beam 2. Suspension rods 3 are arranged on the suspension beam 2. The suspension rods 3 are symmetrically distributed on both sides of the pipeline 7. The suspension rods 3 are connected by a supporting beam 4. The supporting beam 4 is used to support the pipeline 7. The retaining wall 6 is arranged between two adjacent retaining piles 5 on both sides of the pipeline 7. The retaining wall 6 extends downward from the capping beam 14 to the foundation bottom.

[0034] The pipeline 7 is suspended by the support beam 1, the suspension beam 2, the suspension rod 3 and the supporting beam 4, which can ensure the stability of the suspension protection structure and avoid damage to the pipeline 7 during the suspension process. The load generated during the suspension process of the pipeline 7 is transmitted to the retaining piles on both sides of the pipeline 7 through the support beam 1, the suspension beam 2 and the capping beam 14. The connection between two adjacent retaining piles 5 on both sides of the pipeline 7 by the retaining wall 6 can ensure the stability of the soil around the pipeline 7. During the suspension of the pipeline 7 and the excavation of the foundation pit under the pipeline 7, it can avoid the disturbance of the soil around the pipeline 7 and cause the pipeline 7 to deform, thereby effectively protecting the pipeline 7 and ensuring the normal use of the pipeline 7.

[0035] Referring to Figure 5 , a wrapping structure 8 is arranged in the length direction of the pipeline 7. The wrapping structure 8 wraps the pipeline 7. During the suspension of the pipeline 7, it can effectively protect the pipeline 7, increase the stiffness of the pipeline 7 and prevent the pipeline 7 from being damaged; the supporting beam 4 is located at the bottom of the wrapping structure. The pipeline 7 is suspended by the supporting beam 4 and the suspension rod 3. The supporting beam 4 has a relatively wide stress area. On the one hand, it can avoid direct contact with the pipeline 7 and prevent the pipeline 7 from being damaged. On the other hand, it can improve the force dispersion effect and prevent damage to the part where the wrapping structure and the supporting beam 4 contact, thereby improving the protection effect on the pipeline 7. The wrapping structure 8 is a steel-concrete structure, and a steel mesh 800 is arranged therein. The steel mesh 800 wraps the pipeline 7 as a whole, which can further improve the protection effect on the pipeline 7; the cross-sectional shape of the wrapping structure 8 is generally rectangular, and the thickness of the wrapping structure 8 on the surface of the pipeline 7 is 200 - 300 mm (the vertical distance between the edge of the wrapping structure and the edge of the pipeline).

[0036] The retaining wall 6 extends downward from the bottom of the capping beam 14 to the base of the foundation pit excavation. Multiple waist beams 9 are arranged in the height direction of the retaining wall 6. Each waist beam 9 is arranged along the length direction of the retaining wall 6. Multiple anchor cables 10 are fixedly connected to each waist beam 9. Each anchor cable 10 passes through the retaining wall 6 and obliquely extends into the soil around the retaining wall 6. Under the combined action of the anchor cables 10 and the waist beams 9, the stability of the retaining wall 6 can be improved, and the protection effect of the retaining wall 6 can be enhanced. Thus, during the excavation process, the disturbance of the soil between the retaining piles 5 on both sides of the pipeline 7 can be reduced, and the stability of the suspension protection structure of the existing pipeline can be improved. Both the waist beam 9 and the retaining wall 6 are of reinforced concrete structure and are integrally formed by concrete pouring. The two ends of the retaining wall 6 are connected to the retaining piles 5 by the post-inserted reinforcement method of connecting bars 601 (refer to Figure 4 ), or the steel bars at both ends of the retaining wall 6 are welded to the main steel bars of the retaining piles 5.

[0037] The support beam 1 is made of Bailey beam or double-rolled I-beam. When the diameter of the pipeline is not less than 800 mm, the Bailey beam is preferably used. A group of support beams 1 are respectively arranged on both sides of the pipeline 7. Each group of support beams 1 includes two or more groups of Bailey sheets. The adjacent groups of Bailey sheets are connected by Bailey sheet cross braces to improve the structural stability of the support beam 1. When the distance between two pipelines 7 is relatively close (such as when the distance between the two pipelines is not greater than 2 m), between the two pipelines 7, the two pipelines 7 can share a group of support beams 1. The support beam 1 and the capping beam 14 are connected by embedded parts 11. Refer to Figure 7 、 Figure 8 , the embedded part 11 includes an embedded steel plate 110 and an anchor bolt 111. The anchor bolt 111 is integrally formed with the embedded steel plate 110. The anchor bolt 111 is welded to the steel bar framework of the capping beam 14. The embedded part 11 is cast in the capping beam 14 with the capping beam 14 concrete. The support beam 1 and the embedded part 11 are connected by a limiter to prevent the support beam 1 from slipping and ensure the stability of the support beam 1. The limiter includes a connecting plate 19 and a support member 21. The two support members 21 are oppositely arranged on the embedded steel plate 110. The support member 21 is welded to the embedded steel plate 110. The distance between the two support members 21 is not less than the width of the lower chord 17 of the Bailey sheet of the support beam 1. The lower chord 17 is made of double-rolled channel steel or double-rolled I-beam. The vertical rod 18 is arranged in the middle of the lower chord 17. When the lower chord 17 is made of double-rolled channel steel, one or more connecting rib plates 22 are arranged in the notch of the double-rolled channel steel. A sliding groove 23 is arranged on the connecting rib plate 22. One end of the connecting plate 19 is integrally provided with a connecting boss 20. The cross-sectional shape of the connecting boss 20 is rectangular. A connecting groove penetrating the connecting boss 20 is arranged in the middle of the connecting boss 20 (refer to Figure 9), when the connecting rib plate 22 and the connecting plate 19 are connected, the connecting rib plate 22 is embedded in the connecting groove of the connecting boss 20. By using bolts to pass through the connecting holes on the connecting boss 20 and the sliding groove 23 on the connecting rib plate 22 at the same time, the connecting rib plate 22 and the connecting plate 19 can be connected. After connection, adjusting the nut on the bolt can make the connecting plate 19 slide on the connecting rib plate 22. The support member 21 is made of channel steel or I-beam. Connecting holes are provided on the support member 21, and a connecting groove 24 is provided on the connecting plate 19. When the connecting plate 19 slides to contact the top of the support member 21, bolts are used to pass through the connecting groove on the connecting plate 19 and the connecting holes on the support member 21 at the same time to connect and fix the connecting plate 19 and the support member 21. The position limiter adopts a structure in which the connecting plate 19 and the support member 21 cooperate with each other, which can make the support beam 1 be stably installed on the embedded part 11 and is also convenient for the subsequent removal of the support beam 1. Figure 8 shows the connection structure between the lower chord of a group of Bailey sheets and the embedded part when the support beam adopts a Bailey beam. When the Bailey beam adopts multiple groups of Bailey sheets, position limiters can be provided on the lower chords of one or more groups of Bailey sheets, or position limiters can be provided on the lower chords on both sides of the Bailey beam (refer to Figure 11 ), to ensure the stability of the connection between the Bailey beam and the embedded part; when the support beam adopts double I-beams, position limiters can be provided on both sides of the double I-beams.

[0038] A polytetrafluoroethylene plate 16 is provided between the support beam 1 and the embedded part 11 (the polytetrafluoroethylene plate can be pasted on the embedded steel plate with glue). The set width of the polytetrafluoroethylene plate 16 is not less than the width of the support beam 1. After installing the support beam 1, the polytetrafluoroethylene plate 16 can play a shock-absorbing role during the subsequent excavation process and reduce the influence of soil deformation on the stability of the suspended protection structure.

[0039] Refer to Figure 6, the suspension beam 2 includes two relatively arranged first cross beams 200. There is an interval between the two first cross beams 200 for the suspension rod to pass through. The tops of the two first cross beams 200 are connected by a first connecting plate 201, and the bottoms are connected by a second connecting plate 202. The first connecting plate 201 and the second connecting plate 202 are coaxial. The first cross beam 200 and the first connecting plate 201 are welded, and the first cross beam 200 and the second connecting plate 202 are welded. The first cross beam 200 is made of 25c channel steel. Rib plates 203 are arranged in the notch of the first cross beam 200. Multiple rib plates 203 are arranged along the length direction of the first cross beam 200. Multiple first connecting plates 201 and multiple second connecting plates 202 are arranged along the length direction of the first cross beam 200 to improve the overall structural strength of the suspension beam 2; at the suspension rod installation part, the number of rib plates 203 in the corresponding area can be increased to prevent the suspension beam 2 from deforming. The first cross beam 200 and the support beam 1 are welded (or can be detachably connected) to prevent the suspension beam 2 from slipping on the support beam 1 and ensure the stability of the connection between the suspension beam 2 and the support beam 1. The structure of the supporting beam 4 is the same as that of the suspension beam 2, including two relatively arranged second cross beams. There is an interval between the two second cross beams for the suspension rod to pass through. The tops of the two second cross beams are connected by a first connecting plate, and the bottoms are connected by a second connecting plate. The first connecting plate and the second connecting plate are coaxial. The second cross beam and the first connecting plate are welded, and the second cross beam and the second connecting plate are welded. The second cross beam is made of 25c channel steel. Rib plates are arranged in the notch of the second cross beam. Multiple rib plates are arranged along the length direction of the second cross beam. Multiple first connecting plates and multiple second connecting plates are arranged along the length direction of the second cross beam; at the suspension rod installation part, the number of rib plates in the corresponding area can be increased to prevent the supporting beam from deforming.

[0040] The suspension rod 3 is made of precision rolled threaded steel with a diameter of 32 - 40 mm. The suspension rod 3 is connected to the suspension beam 2 and the suspension rod 3 is connected to the supporting beam 4 through steel plate gaskets 12 and double nuts 13; Multiple internal bracings 15 in the foundation pit are also arranged in the height direction of the retaining pile 5. The internal bracing 15 in the foundation pit is connected to the opposite retaining pile 5. During the foundation pit excavation process, the internal bracing 15 in the foundation pit can improve the supporting effect on the soil around the foundation pit, ensure the stability and safety of the suspension protection structure of the existing pipeline during the foundation pit excavation construction process, and ensure the safety of the foundation pit excavation construction.

[0041] The above is only a detailed description of the specific implementation manner of the present utility model, rather than a limitation to the present utility model. Various substitutions, variations, and improvements made by those skilled in the relevant technical fields without departing from the principle and scope of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A suspension protection structure for an existing pipeline, characterized in that, Including: Support beam (1), suspension beam (2), suspension rod (3), supporting beam (4), retaining pile (5) and retaining wall (6). Multiple retaining piles (5) enclose the construction area of the foundation pit to be excavated. The tops of adjacent retaining piles (5) are connected into an integral structure through a capping beam (14). The capping beam (14) is located above the pipeline (7). The pipeline (7) passes through between two adjacent retaining piles (5). Support beams (1) are respectively arranged on both sides of the pipeline (7). The bottom of the support beam (1) is located above the capping beam (14). The tops of the support beams (1) are connected through a suspension beam (2). The suspension rods (3) are arranged on the suspension beam (2). The suspension rods (3) are symmetrically distributed on both sides of the pipeline (7). The suspension rods (3) are connected through a supporting beam (4). A wrapping structure (8) is arranged in the length direction of the pipeline (7). The supporting beam (4) is used to support the pipeline (7). The retaining wall (6) is arranged between two adjacent retaining piles (5) on both sides of the pipeline (7). The retaining wall (6) extends downward from the bottom of the capping beam (14) to the base of the foundation pit excavation.

2. The suspension protection structure for existing pipelines according to claim 1, characterized in that, The wrapping structure (8) is a steel-concrete structure, and a steel mesh sheet (800) for wrapping the pipeline (7) is arranged inside the wrapping structure (8).

3. The suspension protection structure for existing pipelines according to claim 1, wherein, Multiple waist beams (9) are arranged in the height direction of the retaining wall (6). Each waist beam (9) is arranged along the length direction of the retaining wall (6). Multiple anchor cables (10) are fixedly connected to each waist beam (9). Each anchor cable (10) passes through the retaining wall (6) and obliquely extends into the soil around the retaining wall (6).

4. The suspension protection structure for existing pipelines according to claim 3, characterized in that, Both the waist beam (9) and the retaining wall (6) are steel-concrete structures. The waist beam (9) and the retaining wall (6) are cast into an integral structure through concrete; the two ends of the retaining wall (6) are connected to the retaining piles (5) by the way of planting reinforcement bars with connecting reinforcement bars (601), or the steel bars at the two ends of the retaining wall (6) are welded to the main steel bars of the retaining piles (5).

5. The suspension protection structure for an existing pipeline according to claim 1, wherein, The support beam (1) adopts a Bailey beam or double-rolled I-beam. When the support beam (1) adopts a Bailey beam, the support beam (1) includes two groups or more groups of Bailey sheets, and adjacent groups of Bailey sheets are connected through Bailey sheet cross braces.

6. The suspension protection structure for existing pipelines according to claim 5, characterized in that, The support beam (1) and the capping beam (14) are connected through embedded parts (11). The support beam (1) and the embedded parts (11) are connected through a limiter.

7. The suspension protection structure for an existing pipeline according to claim 6, characterized in that, The embedded parts (11) include embedded steel plates (110) and anchor bolts (111); the limiter includes a connecting plate (19) and a support member (21). Two support members (21) are arranged oppositely on the embedded steel plate (110). The distance between the two support members (21) is not less than the width of the support beam (1). Connecting rib plates (22) are respectively arranged on both sides of the support beam (1). A sliding groove (23) is arranged on the connecting rib plate (22). One end of the connecting plate (19) is integrally provided with a connecting boss (20). A connecting groove penetrating the connecting boss (20) is arranged in the middle of the connecting boss (20). The connecting rib plate (22) is connected to the connecting boss (20), and the connecting plate (19) is connected to the support member (21).

8. The suspension protection structure for existing pipelines according to claim 6, characterized in that, A polytetrafluoroethylene plate (16) is arranged between the support beam (1) and the embedded part (11).

9. The suspension protection structure for existing pipelines according to claim 1, characterized in that The suspension beam (2) includes two first cross beams (200) arranged oppositely. There is a space for the suspension rod to pass through between the two first cross beams (200). The tops of the two first cross beams (200) are connected by a first connecting plate (201), and the bottoms are connected by a second connecting plate (202). The first connecting plate (201) and the second connecting plate (202) are coaxial. Rib plates (203) are arranged in the notches of the first cross beams (200). Multiple rib plates (203) are arranged along the length direction of the first cross beams (200). Multiple first connecting plates (201) and multiple second connecting plates (202) are arranged along the length direction of the first cross beams (200).

10. The suspension protection structure for an existing pipeline according to any one of claims 1 to 9, characterized in that, Multiple in-pit supports (15) are arranged in the height direction of the retaining pile (5). The in-pit support (15) is connected to the opposite retaining pile (5); the suspension rod (3) is connected to the suspension beam (2), and the suspension rod (3) is connected to the bearing beam (4) through steel plate gaskets (12) and double nuts (13).

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