Prefabricated concrete cutoff wall for hydraulic protection of oil and gas pipeline

Abstract

The utility model provides a prefabricated concrete cut-off wall for hydraulic protection of an oil and gas pipeline, which is characterized by comprising a prefabricated concrete base, a prefabricated concrete top cover and a prefabricated concrete auxiliary wall, the prefabricated concrete base is thick at the lower part and thin at the upper part, and a semicircular channel is reserved in the middle for mounting a pipeline; a connecting opening used for being assembled with the prefabricated concrete top cover is reserved in the upper portion of the prefabricated concrete top cover, a semicircular channel used for installing a pipeline is reserved in the middle of the lower end of the prefabricated concrete top cover, connecting openings used for being in butt joint with the base and the auxiliary wall are formed in the upper end and the lower end of the prefabricated concrete top cover respectively, and a connecting opening used for being in butt joint with the top cover is also formed in the lower end of the auxiliary wall. The method of prefabricating in advance and assembling on site is adopted, so that the site construction time and cross operation are reduced, and the construction efficiency of hydraulic protection and pipeline laying is greatly improved; concrete materials are adopted for prefabrication, quality detection can be conducted before site construction, the strength is far higher than that of an ecological bag, the quality defect of grouted rubble is avoided, the member quality is guaranteed to a greater extent, and meanwhile the problem that a grouted rubble structure is difficult to adopt in a stone lacking area is solved.

Description

Technical Field

[0001] The utility model relates to the field of oil and gas pipeline laying, in particular to a prefabricated assembled concrete water cutoff wall for hydraulic protection of oil and gas pipelines. Background Art

[0002] Oil and gas pipelines are usually laid underground over long distances. In order to ensure the buried depth of the pipelines, a large amount of loose soil is backfilled into the trenches, which weakens the trenches' ability to resist erosion. When the pipelines pass through slopes such as mountains and hills, the trench backfill soil is easily lost under the scouring of slope runoff. The development of gully erosion will cause the entire trench backfill soil to be partially or completely lost, exposing the pipelines or even leaving them suspended in the air, causing major safety hazards.

[0003] Water cut-off walls are the most widely used slope protection measures in the pipeline industry. They are installed inside the trench and at certain intervals along the trench. They can reduce or eliminate the scouring effect of surface runoff on the trench backfill soil and ensure the safety of pipeline laying. At present, the commonly used structural forms of water cut-off walls are ecological bag water cut-off walls, mortar masonry water cut-off walls, and cast-in-place concrete water cut-off walls. Among them, the ecological bag water cut-off wall is made of straw bags or polyester bags filled with plain soil and connected with special connectors; the mortar masonry water cut-off wall is made of cement mortar masonry stones; the cast-in-place concrete is made of plain concrete or reinforced concrete poured on site.

[0004] The ecological bag water cutoff wall has low anti-erosion ability, and the quality of bag filling and connection is difficult to guarantee. It can generally only be used in earthen trenches with gentle slopes. The mortar-made stone water cutoff wall needs to be built on site, the mortar fullness is generally poor, the construction quality is difficult to guarantee, and it is difficult to achieve in areas where stone is scarce. Cast-in-place concrete requires supporting formwork in the trench, pouring and curing on site, resulting in cross-operation and a great impact on the construction period. Utility Model Content

[0005] The utility model aims to provide a prefabricated assembled concrete water cutoff wall for oil and gas pipeline hydraulic protection, which reduces on-site construction time and cross-operation and greatly improves the construction efficiency and quality of hydraulic protection and pipeline laying.

[0006] The utility model is achieved in this way:

[0007] The utility model provides a prefabricated assembled concrete water cutoff wall for hydraulic protection of oil and gas pipelines, characterized in that it comprises a prefabricated concrete base, a prefabricated concrete top cover and a prefabricated concrete auxiliary wall, the prefabricated concrete base is thick at the bottom and thin at the top, a semicircular channel is left in the middle for installing the pipeline, a connecting port for assembling with the prefabricated concrete top cover is left at the upper part, a semicircular channel for installing the pipeline is also left in the middle of the lower end of the prefabricated concrete top cover, the upper and lower ends of the prefabricated concrete top cover are respectively provided with connecting ports for connecting with the base and the auxiliary wall, and the lower end of the auxiliary wall is also provided with a connecting port for connecting with the top cover.

[0008] In some optional implementation schemes, the precast concrete base, the precast concrete top cover and the precast concrete auxiliary wall are arranged in an inverted trapezoidal shape after being assembled.

[0009] In some optional embodiments, the connection port includes a protruding portion protruding outward and a recessed portion recessed downward, and the protruding portions and the recessed portions of the two docking connection ports cooperate with each other.

[0010] In some optional embodiments, the upper ends of the precast concrete base, the precast concrete top cover and the precast concrete auxiliary wall are all provided with lifting ears for lifting.

[0011] In some optional implementation schemes, steel bars are arranged in the precast concrete base, the precast concrete top cover and the precast concrete auxiliary wall.

[0012] In some optional embodiments, the precast concrete base, the precast concrete top cover and the precast concrete auxiliary wall are connected by waterproof mortar.

[0013] In some optional embodiments, the precast concrete base and the precast concrete top cover are integrally prefabricated and formed in one piece, with a complete circular hole left in the middle for the pipeline to pass through.

[0014] In some optional implementation schemes, when the pipe trench is deep and the auxiliary wall is not high enough, a prefabricated auxiliary wall is added to the auxiliary wall, and the height is adjusted according to the depth of the pipe trench.

[0015] The beneficial effects of the utility model are as follows: the method of prefabrication in advance and on-site assembly is adopted to reduce on-site construction time and cross-operation, greatly improving the construction efficiency of hydraulic protection and pipeline laying; the use of prefabricated concrete materials can allow quality inspection before on-site construction, which not only has much higher strength than ecological bags, but also avoids the quality defects of mortar masonry, thereby ensuring the quality of components to a greater extent, and at the same time solving the problem of difficulty in adopting mortar masonry structures in areas where stone is scarce. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of a prefabricated assembled concrete water cutoff wall provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0026] like Figure 1 As shown, the utility model provides a prefabricated assembled concrete water cutoff wall for hydraulic protection of oil and gas pipelines, including a prefabricated concrete base 1, a prefabricated concrete top cover 4 and a prefabricated concrete auxiliary wall 7. The prefabricated concrete base, the prefabricated concrete top cover and the prefabricated concrete auxiliary wall are arranged in an inverted trapezoidal shape after assembly. The prefabricated concrete base 1 is thick at the bottom and thin at the top, with a semicircular channel in the middle for installing the pipeline, and a connection port 2 for assembling with the prefabricated concrete top cover at the top. The prefabricated concrete top cover 4 also has a semicircular channel in the middle of the lower end for installing the pipeline, and its upper and lower ends are respectively provided with connection ports (5, 6) for connecting with the base and the auxiliary wall. The lower end of the auxiliary wall 7 is also provided with a connection port 8 for connecting with the top cover. The prefabricated concrete base 1, the prefabricated concrete top cover 4 and the prefabricated concrete auxiliary wall 7 are all equipped with steel bars.

[0027] In this embodiment, the connection port includes a protruding portion protruding outward and a concave portion concave downward, and the protruding portions and the concave portions of the two butted connection ports cooperate with each other.

[0028] In this embodiment, both sides of the upper ends of the precast concrete base 1, the precast concrete top cover 4 and the precast concrete auxiliary wall 7 are provided with lifting ears 3 for lifting.

[0029] When the oil and gas pipeline is laid on a slope with an inclination of 5° to 45°, the size of the cut-off wall is determined and prefabricated according to the diameter of the pipeline during the trench excavation construction process; after the trench excavation is completed, the prefabricated parts are transported to the site, and the base 1 is first hoisted and placed horizontally on the trench foundation, and then waterproof mortar is used to mortar according to the slope, and then the pipeline is placed on the base 1, and then the top cover 4 is hoisted, and the top cover 4 is connected to the base 1 with waterproof mortar, and finally the auxiliary wall 7 is hoisted to complete the installation and backfill the trench.

[0030] When the pipe diameter is small, the base 1 and the top cover 4 can be prefabricated as a whole, leaving a complete circle in the middle for the pipe to pass through. When the pipe trench is deep and the auxiliary wall is not high enough, a prefabricated auxiliary wall can be added to the auxiliary wall, and the height can be adjusted according to the depth of the pipe trench; when multiple pipes are laid in parallel, the base and top cover can be prefabricated according to the arrangement of the pipes.

[0031] The utility model adopts the method of prefabrication in advance and on-site assembly, which reduces on-site construction time and cross-operation, greatly improving the construction efficiency of hydraulic protection and pipeline laying. It is prefabricated with concrete materials, and quality inspection can be carried out before on-site construction. Not only is the strength much higher than that of ecological bags, but it also avoids the quality defects of mortar masonry, ensuring the quality of components to a greater extent, and at the same time solving the problem that it is difficult to use mortar masonry structures in areas where stone is scarce.

[0032] The embodiments described above are part of the embodiments of the utility model, but not all of the embodiments. The detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model claimed for protection, but only represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A prefabricated concrete cut-off wall for hydraulic protection of oil and gas pipelines. It is characterized in that It includes a precast concrete base, a precast concrete top cover and a precast concrete auxiliary wall. The precast concrete base is thick at the bottom and thin at the top, with a semicircular channel in the middle for installing pipes, and a connecting port for assembling with the precast concrete top cover at the top. A semicircular channel for installing pipes is also left in the middle of the lower end of the precast concrete top cover, and its upper and lower ends are respectively provided with connecting ports for connecting with the base and the auxiliary wall. The lower end of the auxiliary wall is also provided with a connecting port for connecting with the top cover.

2. The prefabricated assembled concrete water cutoff wall for hydraulic protection of oil and gas pipelines according to claim 1, It is characterized in that The precast concrete base, the precast concrete top cover and the precast concrete auxiliary wall are arranged in an inverted trapezoidal shape as a whole after being assembled.

3. The prefabricated assembled concrete cutoff wall for hydraulic protection of oil and gas pipelines according to claim 1 or 2, It is characterized in that The connection port comprises a protruding portion protruding outward and a concave portion concave downward, and the protruding portions and the concave portions of the two butted connection ports match each other.

4. The prefabricated assembled concrete water cutoff wall for hydraulic protection of oil and gas pipelines according to claim 1 or 2, It is characterized in that The upper ends of the precast concrete base, the precast concrete top cover and the precast concrete auxiliary wall are all provided with lifting ears for lifting.

5. The prefabricated assembled concrete cutoff wall for hydraulic protection of oil and gas pipelines according to claim 1 or 2, It is characterized in that The precast concrete base, the precast concrete top cover and the precast concrete auxiliary wall are all provided with steel bars.

6. The prefabricated assembled concrete cutoff wall for hydraulic protection of oil and gas pipelines according to claim 1 or 2, It is characterized in that The precast concrete base, the precast concrete top cover and the precast concrete auxiliary wall are connected by waterproof mortar.

7. The prefabricated assembled concrete cutoff wall for hydraulic protection of oil and gas pipelines according to claim 1 or 2, It is characterized in that When the diameter of the pipeline is less than 400 mm, the precast concrete base and the precast concrete top cover are integrally prefabricated and formed in one piece, and a complete circular hole is left in the middle for the pipeline to pass through.

8. The prefabricated assembled concrete cutoff wall for hydraulic protection of oil and gas pipelines according to claim 1 or 2, It is characterized in that When the trench is deep and the auxiliary wall is not high enough, a prefabricated auxiliary wall is added to the auxiliary wall, and the height is adjusted according to the depth of the trench.

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