Construction method of sliding support for connecting pressure pipeline supporting ring and buttress

Abstract

The invention discloses a construction method of a sliding support for connecting a pressure pipeline supporting ring and a buttress, which is suitable for an inclined section of the pressure pipeline and comprises the following steps: (1) welding the supporting ring on the pressure pipeline and welding a supporting ring bottom plate; (3) a sliding support is installed on the support pad stone, a lower steel plate of the sliding support is fixedly connected with the support pad stone through the embedded bolts, and an upper steel plate of the sliding support is fixedly welded to the supporting ring bottom plate; the bottom of the supporting ring is welded with the embedded steel plate, and the top is flush with the supporting ring bottom plate. The pipeline is only kept in a moving space in the axis direction of the pipeline, the directionality of sliding of the pipeline is improved, it is guaranteed that the pipeline and a supporting ring of the pipeline cannot be damaged due to friction resistance generated by contact between the pipeline and a buttress due to temperature stress, the water hammer effect, the cavitation erosion effect and the like, and the operation and maintenance cost of the water delivery pressure pipeline in the open-air environment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of installation of pressure pipes in water conservancy and hydropower engineering, and in particular to a construction method of a sliding bearing for connecting a pressure pipe support ring with a buttress. Background Art

[0002] Pipeline transportation is widely used in all walks of life. Heat, water, natural gas, oil and other media are transported through pipelines. As a metal pipeline for transportation, the support ring of the fixed pipeline is generally connected to the pipeline base (pier) by consolidation. Since the pipeline is affected by the temperature changes of the external environment and the temperature changes of the transportation medium itself, the pipeline will be displaced. If the support ring of the pressure pipeline is directly fixed on the pipeline pier, when the pipeline is micro-deformed due to temperature stress, medium impact force, cavitation, etc., the support ring will be damaged, resulting in excessive maintenance costs and affecting the normal operation of the project. Therefore, a sliding support is usually set between the support ring and the pier to allow the pipeline to move, but there is no directionality. However, the existing sliding support is often placed horizontally, and the upper structure of the support is allowed to slide horizontally to the left and right, front and back, and there is no directionality. It is inconsistent with the requirement that only micro-deformation along the pipeline axis is required for the steeper inclined pipe section of the pressure pipeline in the open air environment. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a construction method of a sliding bearing for connecting a pressure pipe support ring with a buttress, which can specifically adopt the following technical solutions: The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress of the present invention is suitable for the inclined section of the pressure pipe, and comprises the following steps: The first step is to weld a support ring on the pressure pipe and weld a support ring bottom plate at the bottom of the support ring; The second step is to pour concrete on the pier to form a support pad stone, and at the same time, pre-embedded bolts and pre-embedded steel plates are set on the support pad stone; The third step is to install the sliding bearing on the bearing pad stone, wherein the lower steel plate of the sliding bearing is connected and fixed to the bearing pad stone by embedded bolts, and the upper steel plate of the sliding bearing is welded and fixed to the bottom plate of the support ring; The fourth step is to install baffles on the support pad stone. The baffles are located outside the pressure pipe, and the bottom of each baffle is welded to the embedded steel plate, and the top is flush with the support ring bottom plate.

[0004] Oblique support legs are arranged on both sides of the bottom of the support ring, and the oblique support legs are symmetrically arranged along the central axis of the pressure pipe, and the support ring bottom plate is arranged at the bottom of each oblique support leg.

[0005] The support ring bottom plate is provided with reinforcing ribs located on both sides of the oblique support legs, and the reinforcing ribs are perpendicular to the surface where the oblique support legs are located.

[0006] The support pad stones are arranged in pairs on each pier, and each support pad stone is correspondingly arranged below the support ring bottom plate.

[0007] The embedded bolts are arranged at the four feet of the steel plate under the sliding support.

[0008] The embedded steel plate is provided on each support pad stone and is located on a side of the support pad stone close to the outside of the pressure pipe.

[0009] The baffle is composed of a horizontal top plate, a vertical plate and a horizontal bottom plate connected in sequence. " structure, and the horizontal top plate is flush with the support ring bottom plate, and the four sides of the horizontal bottom plate are welded to the embedded steel plate.

[0010] The buttress is arranged in the middle of the inclined section of the pressure pipeline, and both ends of the inclined section of the pressure pipeline are arranged on the anchor piers.

[0011] The construction method of the sliding bearing for connecting the support ring of the pressure pipeline and the pier provided by the present invention is suitable for the pressure pipeline with piers arranged at both ends and the middle section supported by the piers. The installation surface of the pier and the sliding bearing installed on the pier are consistent with the inclination of the pipeline, and the support ring is sleeved on the outer side of the pipeline, and the sliding bearing is respectively connected to the support ring and the pier. At the same time, a baffle connected to the pier is arranged on one side of the sliding bearing for resisting the non-axial movement of the sliding bearing. Through the above measures, the disadvantages of the traditional sliding bearing that can only be placed horizontally and can slide without directionality are broken, and the defects that the traditional sliding bearing has no restriction on the sliding of the pipeline and the fixed bearing has too much restriction on the pipeline are avoided. It can make the traditional sliding bearing suitable for the installation of the inclined section of the pressure pipeline, and standardize the sliding direction of the pipeline so that the pipeline only maintains the activity space along the axis direction of the pipeline, improves the directionality of the pipeline sliding, ensures that the pipeline and its support ring will not be damaged due to the friction resistance generated by contact with the pier due to temperature stress, water hammer, cavitation, etc., prolong the service life of the support ring, and reduce the operation and maintenance cost of the pressure pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the connection structure between the pier, the sliding support and the pressure pipeline described in the present invention.

[0013] Figure 2 yes Figure 1 Top view of the .

[0014] Figure 3 yes Figure 1 AA cross-section diagram.

[0015] Figure 4 yes Figure 3 Enlarged view of the connection between the diagonal brace and the pier on the right side of the middle.

[0016] Figure 5 yes Figure 2 Schematic diagram of the connection of a single sliding bearing.

[0017] Figure 6 It is a schematic diagram of the installation structure of the reinforcing rib on the support ring base plate.

[0018] Figure 7 It is a schematic diagram of the connection structure between the baffle and the embedded steel plate. DETAILED DESCRIPTION

[0019] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific construction process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0020] like Figure 1-7 As shown, the construction method of the sliding bearing for connecting the pressure pipe support ring and the pier described in the present invention is suitable for the installation of oil pipelines, natural gas pipelines, thermal pipelines, water pipelines, etc., especially the inclined section of the water pressure pipeline located in the open air environment in water conservancy projects.

[0021] This embodiment is explained by taking the inclined section of the pressure pipeline in the open air environment in the water conservancy project as an example. Specifically, anchor piers are arranged at both ends of the pressure pipeline M, and the middle pipe section is supported by piers N. Through the specially arranged connection structure between the piers N, the sliding support 1 and the pressure pipeline M, the pipeline has space for micro-sliding along the pipe axis direction, thereby reducing the friction resistance caused by the contact between the pressure pipeline M and the pier N due to temperature stress, water hammer, cavitation, etc., thereby extending the service life of the sliding support and reducing the operation and maintenance cost of the water supply pressure pipeline in the open air environment.

[0022] The installation surface of the above-mentioned pier N is consistent with the inclination of the pressure pipeline M, and the connection structure between the pier N, the sliding support 1 and the pressure pipeline M is as follows: a pair of support pads 2 are arranged on each pier N, and the support pads 2 are concrete structures, and the center line thereof is perpendicular to the central axis of the pressure pipeline M. Four embedded bolts 3 and a embedded steel plate 4 are arranged on each of the above-mentioned support pads 2. A number of support rings 5 ​​are welded and fixed on the pressure pipeline M, and the number of support rings 5 ​​is equal to the number of piers N, and each support ring 5 is arranged coplanar with the center line of the support pad 2 below it. The above-mentioned support rings 5 ​​have the same structure, and both sides of the bottom of each support ring 5 are provided with oblique support legs 51 of plate-type structure, and the bottom of each oblique support leg 51 is welded with a support ring bottom plate 52 parallel to the installation surface of the pier N. Preferably, the support ring bottom plate 52 is also provided with reinforcing ribs 53 located on both sides of the oblique support legs 51, and the reinforcing ribs 53 are perpendicular to the surface where the oblique support legs 51 are located. The inclined support legs 51 and the support ring bottom plate 52 on the same support ring 5 are symmetrically arranged along the central axis of the pressure pipe M, and each support ring bottom plate 52 corresponds to the position of the support pad stone 2 below it, and the two are connected to a sliding support 1 in the following manner. That is: the four feet of the lower steel plate of the sliding support 1 are respectively connected to four embedded bolts 3, so that the sliding support 1 is connected to the support pad stone 2; the upper steel plate of the sliding support 1 is welded to the support ring bottom plate 52, so that the sliding support 1 is connected to the pressure pipe M. The above connection method enables the pressure pipe M to form a non-fixed connection with the support pad stone 2, and the pressure pipe M can slide. Furthermore, a baffle 6 is installed on the embedded steel plate 4 of the support pad stone 2. The baffle 6 is located on the outside of the pressure pipe M and is composed of a horizontal top plate 61, a vertical plate 62 and a horizontal bottom plate 63 connected in sequence. " structure, wherein the horizontal top plate 61 is flush with the support ring bottom plate 52, and the four sides of the horizontal bottom plate 63 are welded to the embedded steel plate 4. The baffle 6 can better limit the lateral movement of the sliding support 1 and prevent the lateral deformation and lateral shaking of the pressure pipeline M. It can be seen that the connection structure between the pier N, the sliding support 1 and the pressure pipeline M can meet the requirements of the inclined installation of the pressure pipeline M, so that the pressure pipeline M forms a non-fixed connection with the support pad stone 2, and can only be slightly displaced along the pipeline axis direction, avoiding the phenomenon that the pipeline is damaged due to lateral swing caused by the shock wave during operation, thereby extending the service life of the sliding support.

[0023] The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress of the present invention specifically comprises the following steps: The first step is to weld the support ring 5 on the pressure pipe M, and weld the support ring bottom plate 52 at the bottom of the support ring 5; The second step is to pour concrete on the pier N to form a support pad stone 2, and at the same time, to set embedded bolts 3 and embedded steel plates 4 on the support pad stone 2; The third step is to install the sliding support 1 on the support pad stone 2, wherein the lower steel plate of the sliding support 1 is connected and fixed to the support pad stone 2 by embedded bolts 3, and the upper steel plate of the sliding support 1 is welded and fixed to the support ring bottom plate 52; The fourth step is to install the baffle 6 on the support pad stone 2. The baffle 6 is located outside the pressure pipe M, and the bottom of each baffle 6 is welded to the embedded steel plate 4, and the top is flush with the bottom plate of the support ring 5.

[0024] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A construction method for a sliding bearing for connecting a pressure pipe support ring with a buttress, suitable for an inclined section of a pressure pipe, characterized in that: The steps include: The first step is to weld a support ring on the pressure pipe and weld a support ring bottom plate at the bottom of the support ring; The second step is to pour concrete on the pier to form a support pad stone, and at the same time, pre-embedded bolts and pre-embedded steel plates are set on the support pad stone; The third step is to install the sliding bearing on the bearing pad stone, wherein the lower steel plate of the sliding bearing is connected and fixed to the bearing pad stone by embedded bolts, and the upper steel plate of the sliding bearing is welded and fixed to the bottom plate of the support ring; The fourth step is to install baffles on the support pad stone. The baffles are located outside the pressure pipe, and the bottom of each baffle is welded to the embedded steel plate, and the top is flush with the support ring bottom plate.

2. The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress according to claim 1 is characterized by: Oblique support legs are arranged on both sides of the bottom of the support ring, and the oblique support legs are symmetrically arranged along the central axis of the pressure pipe, and the support ring bottom plate is arranged at the bottom of each oblique support leg.

3. The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress according to claim 2 is characterized by: The support ring bottom plate is provided with reinforcing ribs located on both sides of the oblique support legs, and the reinforcing ribs are perpendicular to the surface where the oblique support legs are located.

4. The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress according to claim 1 is characterized in that: The support pad stones are arranged in pairs on each pier, and each support pad stone is correspondingly arranged below the support ring bottom plate.

5. The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress according to claim 1 is characterized in that: The embedded bolts are arranged at the four feet of the steel plate under the sliding support.

6. The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress according to claim 1 is characterized by: The embedded steel plate is provided on each support pad stone and is located on a side of the support pad stone close to the outside of the pressure pipe.

7. The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress according to claim 1 is characterized by: The baffle is composed of a horizontal top plate, a vertical plate and a horizontal bottom plate connected in sequence. " structure, and the horizontal top plate is flush with the support ring bottom plate, and the four sides of the horizontal bottom plate are welded to the embedded steel plate.

8. The construction method of the sliding bearing for connecting the pressure pipe support ring and the buttress according to claim 1 is characterized by: The buttress is arranged in the middle of the inclined section of the pressure pipeline, and both ends of the inclined section of the pressure pipeline are arranged on the anchor piers.

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