Temporary supporting structure of shallow-buried tunnel upper penetrating pipeline

Abstract

The utility model provides a temporary supporting structure of a shallow-buried tunnel upper penetrating pipeline, and relates to the technical field of engineering construction. Comprising pipeline pile foundations, buttresses and pipeline supports, the pile foundations are arranged on the two sides of a pipeline and a tunnel, and the pipeline supports are arranged on the upper portion of the pipeline; the pipeline support comprises a triangular truss and a hanging bracket. The triangular truss is arranged by adopting a three-span continuous beam; the pipeline bracket is arranged along the pipeline; i-shaped steel cross beams are arranged between the pipeline supports and the buttresses; the pipeline support is composed of a triangular truss and a hanging bracket, and the bottom of the pipeline support is fixedly connected with the hanging bracket. The bottom end of the truss is vertically fixed on a horizontally arranged cross beam; the steel pipe pile foundation and the concrete buttress serve as a temporary supporting structure to provide a stable foundation, and fixation and adjustment of pipeline deformation are achieved through the truss and the hanging bracket.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a temporary support structure for a pipeline passing over a shallow-buried tunnel. Background Technology

[0002] With the development of infrastructure construction in my country, tunnel projects are increasing, often involving tunnels passing under other structures, which brings with them structural safety issues. Currently, during the construction of shallow-buried tunnels in soft soil or weak rock, the surrounding rock is often disturbed, easily leading to surface settlement and cracking, which can cause deformation of pipelines, buildings, and other structures, posing a significant threat to tunnel construction and structural safety.

[0003] Currently, there are many research results on the impact and control of tunnel construction on surface structures. For example, patent CN220909769U provides a reinforcement structure for a pipe under a mined tunnel. However, these methods and devices have the following problems to varying degrees: the reinforcement structure itself cannot be fixed on a stable foundation, the control of structural deformation caused by large-section tunnel construction is limited, and it is difficult to accurately correct the resulting structural deformation.

[0004] Under the construction conditions of shallow-buried large-section tunnels, tunnel excavation has a large impact on the surface, forming a large-scale surface subsidence zone, causing severe deformation of pipelines and other structures. Traditional temporary support structures are difficult to meet the deformation control standards for pipeline structures, resulting in significant risks to pipeline operation and tunnel construction. In view of this, there is an urgent need to design a temporary support structure for pipelines passing over shallow-buried tunnels. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model proposes a temporary support structure for pipelines passing over shallow-buried tunnels. It utilizes steel pipe pile foundations and concrete supports as a stable foundation for the temporary support structure, and uses trusses and hangers to fix and adjust pipeline deformation.

[0006] The technical solution of this utility model is as follows:

[0007] The temporary support structure for a pipeline passing over a shallow-buried tunnel is set above the tunnel and includes pipeline pile foundations, piers, and pipeline supports. The pile foundations are set vertically to the ground and are located on both sides of the pipeline and the tunnel. The piers are wrapped around the top of the pile foundations. The piers are set on the top of the pile foundations to support the pipeline supports, and the pipeline supports are set on the upper part of the pipeline for pipeline hoisting. The pipeline supports include triangular trusses and hangers. I-beams are set between the pipeline supports and the piers. The pipeline supports are composed of triangular trusses and hangers. The triangular trusses are erected along the pipeline route, and the hangers are fixedly connected to the bottom of the triangular trusses. The hangers are fitted onto the pipeline. The triangular trusses are set in the form of a three-span continuous beam, and the bottom of the triangular trusses is vertically fixed to the horizontally set beams. The top of the piers is fixedly connected to the beams.

[0008] In the aforementioned temporary support structure, the triangular truss includes a longitudinal main beam, vertical struts, and diagonal braces; the main beam is set along the pipeline route, the upper end of the vertical strut is vertically connected to the longitudinal main beam, and the lower end of the vertical strut is vertically connected to the hanger; the upper end of the diagonal brace is connected to the upper end of the vertical strut, and the lower end of the diagonal brace is connected to the hanger adjacent to the hanger connected to the vertical strut.

[0009] In the aforementioned temporary support structure, the outermost support piers are set outside the subsidence area on both sides of the tunnel, extending from the soil fracture surface to the ground surface; the support piers are made of reinforced concrete or concrete.

[0010] In the aforementioned temporary support structure, precision-rolled threaded steel bars are used on both sides of the hanger to adjust the position of the pipes.

[0011] In the aforementioned temporary support structure, a settlement marker for settlement monitoring is connected to the upper part of the pipeline.

[0012] In the aforementioned temporary support structure, the pile foundations are set vertically to the horizontal plane in the stratum. The pile foundations are set on both sides of the pipeline and the tunnel, and the supports are wrapped around the top of the pile foundations. The bottom depth of the pile foundations is equal to or greater than the depth of the tunnel foundation. The pile foundations are steel pipe piles. The steel pipe piles are composed of steel pipes and fine stone concrete.

[0013] In the aforementioned temporary support structure, the outside of the pipe is wrapped with a rubber insulating sleeve.

[0014] In the aforementioned temporary support structure, soft rubber sheets are installed at the contact points between the pipe support and the pipe.

[0015] In summary, the beneficial effects achieved by this utility model are as follows:

[0016] This utility model extends the depth of the pile foundation to the tunnel base or below, and the farthest support is located outside the surface subsidence area, ensuring that the pile foundation and support will not experience significant displacement due to ground disturbance during tunnel excavation, providing a stable support foundation for the pipeline. Since the top of the pile foundation is inside the support, the pile foundation can reduce the tilting of the support caused by uneven surface settlement and control the amount of support settlement. A settlement gauge is connected to the top of the pipeline, which can monitor the pipeline deformation caused by tunnel excavation in real time and provide feedback to the construction party for correction of pipeline deformation. The two sides of the hanger are made of high-strength threaded steel, and the settlement and tilting deformation of the pipeline caused by tunnel excavation can be adjusted by adjusting the position of the bolts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the structural principle of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the pipe support and the crossbeam in this utility model;

[0019] Figure 3 This is a schematic diagram of the pipe support structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the truss and hanger connection structure in this utility model.

[0021] In the diagram: 1—Tunnel; 2—Pile foundation; 3—Pipeline; 4—Abutment; 5—Pipeline support; 51—Triangular truss; 52—Hanger; 53—Longitudinal main beam; 54—Vertical strut; 55—Diagonal brace; 6—Soil fracture surface; 7—Crossbeam; 8—Settlement marker. Detailed Implementation

[0022] like Figure 1-3 As shown, this utility model relates to a temporary support structure for a pipeline passing over a shallow-buried tunnel, which is set above the shallow-buried tunnel 1; it includes a pipeline support 5 set on the upper part of a horizontally laid pipeline 3, pile foundations 2 set on both sides of the pipeline 3 and the tunnel 1, and a support pier 4 set on the top of the pile foundations 2; the pile foundations 2 are set perpendicular to the horizontal plane in the stratum, and the top of the pile foundations 2 is wrapped by the support pier 4, which is used to support the pipeline support 5; the pipeline support 5 is set along the direction of the pipeline 3 and is used to hoist the pipeline 3; a soft rubber sheet is set at the contact part between the pipeline support 5 and the pipeline 3.

[0023] The bottom of pile foundation 2 is set at a depth equal to or greater than the bottom depth of tunnel foundation 1, and the top of pile foundation 2 is wrapped by support pier 4. Tunnel 1 has soil fracture surfaces 6 on both sides, and the outermost support pier 4 is located outside the settlement area extending from the soil fracture surface 6 to the ground surface. An I-beam beam 7 is installed between pipe support 5 and support pier 4. Pipe support 5 consists of a triangular truss 51 and a hanger 52. The triangular truss 51 is erected along the direction of pipe 3, and the hanger 52 is fixedly connected to the bottom of the triangular truss 51. The hanger 52 is fitted onto pipe 3. The truss 51 adopts a three-span continuous beam structure, and the bottom of the truss 51 is vertically fixed to the horizontally set beam 7. A steel plate is pre-embedded at the top of support pier 4 as a pre-embedded part, which is welded and fixed to the beam 7. Settlement marker 8 is connected to pipe 3 with insulating adhesive.

[0024] The triangular truss 51 consists of a longitudinal main beam 53, a vertical strut 54, and a diagonal brace 55. The main beam 53 is set along the direction of the pipe 3. The upper end of the vertical strut 54 is vertically connected to the longitudinal main beam 53, and the lower end of the vertical strut 54 is vertically connected to the hanger 52. The upper end of the diagonal brace 55 is connected to the upper end of the vertical strut 54, and the lower end of the diagonal brace 55 is connected to the hanger 52 adjacent to the hanger 52 connected to the vertical strut 54.

[0025] During implementation, the pipeline location was first determined, and design information such as the depth, direction, and diameter of pipeline 3 was obtained. The design excavation outline of tunnel 1 was marked, and the location of pile foundation 2 was determined. Pile foundation 2 is a steel pipe pile, which consists of steel pipe and fine aggregate concrete. A hole was drilled at the surface above tunnel 1, then the hole was cleaned and slag removed. The steel pipe was installed, and sections were welded and lowered into the hole using a crane. Fine aggregate concrete was then injected into the pipe, completing the construction of pile foundation 2.

[0026] A concrete support pier 4 is poured at the top of pile foundation 2. The support pier 4 is made of reinforced concrete or concrete. The support pier 4 encloses the tops of multiple pile foundation 2 piles to a depth of not less than 1m. A steel plate is pre-embedded at the top of the support pier 4 as a pre-embedded part. A crossbeam 7 is erected, and the two ends of the crossbeam 7 are welded to the pre-embedded parts of the support pier. A triangular truss 51 is fabricated and erected along the direction of pipe 3. The bottom end of the truss 51 is fixed to the crossbeam 7. The horizontal position and elevation of the truss 51 are measured and verified.

[0027] Based on the given control stake positions and coordinate points, a trench is manually excavated using an intermittent excavation method to expose the pipe 3 at the installation location of the hanger 52. A rubber insulating sleeve is then wrapped around the pipe 3, and the hanger 52 is assembled and installed. High-strength threaded steel bars are used on both sides of the hanger 52 to adjust the pipe position. After adjusting the threaded steel bars, soft rubber sheets are added at the contact points between the hanger 52 and the pipe 1 to fix the position of the pipe 1. Settlement markers 8 are then installed and fixed to the top of the pipe 1. After the hanger 52 is installed, the remaining soil is excavated, and the trench slope is corrected for protection. A drainage ditch is then constructed.

[0028] like Figure 4As shown, a settlement gauge 8 for settlement monitoring is connected to the upper part of the pipeline 3. When the surrounding rock deforms, the pipeline 1 settles or tilts. The settlement and horizontal displacement of the pipeline 1 are measured by the settlement gauge 8. At this time, the settlement and horizontal displacement of the pipeline 1 are corrected by adjusting the bolt positions of the threaded steel on both sides of the hanger 52 where the settlement gauge 8 is located, thereby ensuring the safety of the pipeline.

Claims

1. A temporary support structure for a pipeline passing over a shallow-buried tunnel, the structure being installed above the shallow-buried tunnel, characterized in that, The system includes a pipeline pile foundation (2), a support pier (4), and a pipeline support (5). The support pier (4) is set at the top of the pile foundation (2) to support the pipeline support (5). The pipeline support (5) is set on the upper part of the pipeline for hoisting the pipeline. The pipeline support (5) includes a triangular truss (51) and a hanger (52). An I-beam crossbeam (7) is set between the pipeline support (5) and the support pier (4). The pipeline support (5) is composed of a triangular truss (51) and a hanger (52). The triangular truss (51) is erected along the pipeline route. The bottom of the triangular truss (51) is fixedly connected to the hanger (52), and the hanger (52) is fitted onto the pipeline. The triangular truss (51) is set in the form of a three-span continuous beam. The bottom of the triangular truss (51) is vertically fixed on the horizontally set crossbeam (7). The top of the support pier (4) is fixedly connected to the crossbeam (7).

2. The temporary support structure for a pipeline passing over a shallow-buried tunnel according to claim 1, characterized in that, The triangular truss (51) includes a longitudinal main beam (53), a vertical strut (54), and a diagonal brace (55). The main beam (53) is arranged along the pipeline. The upper end of the vertical strut (54) is vertically connected to the longitudinal main beam (53), and the lower end of the vertical strut (54) is vertically connected to the hanger (52). The upper end of the diagonal brace (55) is connected to the upper end of the vertical strut (54), and the lower end of the diagonal brace (55) is connected to the hanger (52) adjacent to the hanger (52) connected to the vertical strut (54).

3. The temporary support structure for a pipeline passing over a shallow-buried tunnel according to claim 1, characterized in that, The outermost support (4) is set on both sides of the tunnel, extending from the soil fracture surface to the subsidence area on the ground surface; the support (4) is made of reinforced concrete or concrete.

4. The temporary support structure for a pipeline passing over a shallow-buried tunnel according to claim 1, characterized in that, The hanger (52) is made of precision rolled threaded steel on both sides for adjusting the position of the pipe.

5. The temporary support structure for a pipeline passing over a shallow-buried tunnel according to claim 1, characterized in that, The upper part of the pipeline is connected to a settlement gauge (8) for settlement monitoring.

6. The temporary support structure for a pipeline passing over a shallow-buried tunnel according to claim 1, characterized in that, The pile foundation (2) is set vertically to the horizontal plane in the stratum. The pile foundation (2) is set on both sides of the pipeline and the tunnel. The support (4) is wrapped around the top of the pile foundation (2). The bottom depth of the pile foundation (2) is equal to or greater than the depth of the tunnel foundation. The pile foundation (2) is a steel pipe pile. The steel pipe pile is composed of steel pipe and fine stone concrete.

7. The temporary support structure for a pipeline passing over a shallow-buried tunnel according to claim 1, characterized in that, The outside of the pipe is wrapped with a rubber insulating sleeve.

8. The temporary support structure for a pipeline passing over a shallow-buried tunnel according to claim 1, characterized in that, The pipe support (5) is fitted with a soft rubber sheet at the contact point with the pipe.

Images