Large-diameter pipeline support structure in small-section tunnel

Abstract

A large-diameter pipeline support structure in a small-section tunnel comprises a support body, the lower end of the support body is fixed in a groove of a foundation plane through support legs, a groove is formed in the upper end of the support body, and the groove is filled with sand. Arc-shaped faces are arranged on the front portion and the rear portion of the support body and support and limit a pipeline. According to the large-diameter pipeline support structure in the small-section tunnel, the installation efficiency of the pipeline can be improved.

Description

Technical Field

[0001] The utility model relates to a pipeline support, in particular to a large-diameter pipeline support structure in a small-section tunnel. Background Art

[0002] When laying large-diameter pipelines (the diameter of large-diameter pipelines is 1.050m) in small-section tunnels (for example, the diameter of the small-section tunnel of the Wenzhou Dongtou Water Diversion Project is 3.0m. At the same time, according to the "Construction Specifications for Underground Excavation of Hydraulic Structures" SL378-2007, small-section tunnels have an area of ​​10~30m² or a span of 3.0~5.5m.), due to the large diameter of the pipeline, the requirements for the supports for fixing the pipeline are relatively high, and the supports need to have good stability; at the same time, there are also great difficulties in moving the pipeline between supports in small-section tunnels. Conventional lifting and hoisting machinery is difficult to flexibly adjust the pipeline in small-section tunnels, thus greatly reducing the installation efficiency of the pipeline. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a large-diameter pipe support structure in a small-section tunnel, which solves the problems of poor stability of existing pipe supports, low efficiency of pipe movement between pipe supports, and small space when installing and moving the pipes.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A large-diameter pipe support structure in a small-section tunnel includes a support body, the lower end of the support body is fixed in a groove of a foundation surface through support legs, the upper end of the support body is provided with a groove filled with sand; the support body is provided with arc surfaces at the front and rear, and the arc surfaces support and limit the pipeline.

[0006] The support body comprises a bottom plate, and side plates are fixed around the upper end of the bottom plate.

[0007] A detachable pulley is arranged at an arc surface close to one side of the upper end of the support body, and the pulleys are arranged in pairs and at intervals.

[0008] Pairs of columns are vertically fixed at positions corresponding to the pulleys on both sides of the upper end of the support body, the interval between the pairs of columns matches the diameter of the shaft rods at both ends of the pulley, and the shaft rods at both ends of the pulley are placed between the corresponding pairs of columns.

[0009] The utility model provides a large-diameter pipe support structure in a small-section tunnel, which has the following technical effects:

[0010] 1) By placing the support legs of the support body in the groove of the foundation surface and filling it with mortar, the stability of the support body can be increased. By filling the groove of the support body with medium-coarse sand, the pipeline can be protected; by setting the contact surface between the pipeline and the support body as an arc surface, the support body and the pipeline can be closely fitted, thereby improving the stability of the pipeline.

[0011] 2) By installing a pair of pulleys on the top of the support body, the shafts at both ends of each pulley are limited by the columns. When the pipeline falls on the support body, the pipeline is supported by the pulleys, which is convenient for moving forward and backward for fine adjustment. After adjustment, the pipeline is lifted up by the jack and the pulley can be directly taken out. It is simple and convenient to ensure the stability of the pipeline in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 This is a schematic diagram of the structure of the utility model (first perspective).

[0014] Figure 2 It is a schematic diagram of the structure of the utility model (second viewing angle).

[0015] Figure 3 It is a top view of the utility model.

[0016] Figure 4 This is a schematic diagram of the working state of the utility model for supporting the pipeline.

[0017] In the figure: support body 1, bottom plate 1.1, side plate 1.2, support leg 2, groove 3, arc surface 4, lifting ring 5, pulley 6, column 6.1, shaft 6.2, tunnel 7, pipeline 8. DETAILED DESCRIPTION

[0018] like Figure 1-3As shown, a large-diameter pipe support structure in a small-section tunnel includes a support body 1, and the height of the support body 1 is about 60 cm. The support body 1 is a square structure, including a bottom plate 1.1 and side plates 1.2 around it. Four support legs 2 are reserved at the bottom of the support body 1. After the support body 1 is transported to the designated position, the four support legs 2 are embedded into the reserved grooves on the foundation surface and filled with mortar to further increase the stability of the support body 1. The groove on the upper part of the support body 1 is filled with medium-coarse sand, which can protect the overall structure of the pipeline when the pipeline is placed. In addition, an arc surface 4 is provided on the front and rear side plates 1.2 of the support body 1, which can increase the close fit between the pipeline and the support and improve the stability of the pipeline. A lifting ring 5 is fixed on the left and right side plates 1.2 of the support body 1, which is convenient for the lifting and transportation of the pipeline support in the early stage and convenient for fixing the pipeline in the later stage. After the pipeline 8 is placed in place, the pipeline is tied with ropes, and both ends are connected and fixed to the lifting rings 5, so as to further increase the stability of the pipeline and the pipeline support.

[0019] In addition, a group of pulleys 6 are provided at the arc surface 4 near one side of the top of the support body 1 for easy installation and removal. When the pipeline is moved to the support body 1, due to the small cross-section of the pipeline, it is difficult for conventional lifting machinery to adjust the pipeline again. By installing a group of pulleys 6 on each support, the pipeline is placed on the pulleys 6, and the forklift at one end slowly provides a thrust to move the pipeline to the designated position. After the pipeline is moved to a suitable position as a whole, the pipeline is lifted by a jack, a gantry or other means, and the pulley group on the support is taken out.

[0020] Here, for easy removal, two sets of paired columns 6.1 are fixed on both sides of the top of the support body 1, and the spacing between the paired columns 6.1 matches the diameter of the shaft rods 6.2 at both ends of the pulley 6. The paired columns 6.1 can limit the shaft rods 6.2, which is convenient for supporting and rolling the pipeline in the early stage; at the same time, it is convenient for direct removal in the later stage, which is simple and efficient.

[0021] The pipeline 8 in this application is a steel pipeline, and the diameter of the pipeline 8 is 1.02m. The 12-meter pipeline 8 is pre-assembled outside the tunnel and extended to 24m. Before the pipeline 8 is transported and installed in the tunnel, multiple prefabricated support structures (cement concrete) are placed at the designated location for pipeline installation; the plane position and elevation of the support structure are determined by measurement, and the placement and adjustment are carried out by a forklift according to the construction layout points to ensure that the support structure is on the designed route and in a straight line. Since the pipeline installed at a single time is 24 meters long, 3 support structures are arranged at a time, and the distance between two adjacent support structures is 10 meters.

Claims

1. A large diameter pipe support structure in a small cross-section tunnel, characterized by: The support body (1) comprises a support body (1), the lower end of the support body (1) is fixed in a groove of a base surface through a support leg (2), the upper end of the support body (1) is provided with a groove (3), and the groove (3) is filled with sand; the support body (1) is provided with arc surfaces (4) at the front and rear, and the arc surfaces (4) support and limit the pipeline.

2. A large diameter pipe support structure in a small cross-section tunnel according to claim 1, characterized in that: The support body (1) comprises a bottom plate (1.1), and side plates (1.2) are fixed around the upper end of the bottom plate (1.1).

3. The large diameter pipe support structure in a small cross-section tunnel according to claim 1, characterized in that: A detachable pulley (6) is provided at the upper end of the support body (1) near the arc-shaped surface (4) on one side, and the pulleys (6) are arranged in pairs at intervals.

4. A large diameter pipe support structure in a small cross-section tunnel according to claim 3, characterized in that: Pairs of columns (6.1) are vertically fixed at positions corresponding to the pulley (6) on both sides of the upper end of the support body (1); the spacing between the pairs of columns (6.1) matches the diameter of the shafts (6.2) at both ends of the pulley (6); and the shafts (6.2) at both ends of the pulley (6) are placed between the corresponding pairs of columns (6.1).

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