Pipeline foundation structure suitable for weathered rock stratum

Abstract

The utility model relates to the technical field of pipeline construction, in particular to a pipeline foundation structure suitable for a weathered rock stratum, which comprises a plurality of pipelines spliced and assembled in a groove and a reinforcing device arranged at the joint of two adjacent pipelines, the reinforcing device comprises a supporting piece arranged at the joint of the adjacent pipelines and a fixing assembly for fixing the supporting piece in the groove, the supporting piece comprises a supporting plate laid at the bottom of the groove, the supporting plate extends in the length direction of the pipelines, and the pipelines are supported on the supporting plate. The method has the effects of improving the efficiency of laying the pipeline in the weathered rock stratum and reducing the construction cost.

Description

Technical Field

[0001] This application relates to the technical field of pipeline construction, and in particular to a pipeline foundation structure suitable for weathered rock formations. Background Technology

[0002] Weathered rock strata, a common type of geological formation, present numerous challenges to pipeline foundation construction due to their inherently weak rock structure and susceptibility to damage. These characteristics make weathered rock strata prone to collapses and landslides during support engineering, threatening the stability and durability of the pipeline foundation. Therefore, researching pipeline foundation construction techniques in weathered rock strata is of great significance for improving project quality and safety. Pipeline foundation construction refers to a series of engineering activities carried out on the underground foundation before pipeline laying, including ground treatment, foundation design, foundation construction, and foundation acceptance. Its main purpose is to provide a stable, uniform, and level foundation for the pipeline, ensuring its safety and reliability during laying and operation.

[0003] Pipelines are devices made of round pipes, pipe fittings, and valves used to transport gases, liquids, or fluids containing solid particles. Underground pipelines are pipelines constructed by excavating trenches in the ground for transporting liquids. They have a wide range of uses. Existing pipelines are usually prefabricated cement pipes or steel pipes, which are assembled by splicing multiple sections of pipe to form a usable pipeline. However, during construction, due to land subsidence caused by weathered rock layers, the underground pipelines are subjected to certain pressure, which can cause the pipelines to bend and deform, usually resulting in leaks at the joints of adjacent pipelines.

[0004] In the existing prefabricated pipe assembly process, the cement pipe joints are usually supported by building walls and sealed with concrete. The steel pipe joints are fully welded and sealed with additional sealing connectors. The concrete pouring process requires waiting for the concrete to dry completely before construction can continue, which reduces construction efficiency. The addition of sealing connectors increases construction costs and time. Utility Model Content

[0005] In order to improve the efficiency of pipeline laying and reduce construction costs in weathered rock formations, this application provides a pipeline foundation structure suitable for weathered rock formations.

[0006] This application provides a pipe foundation structure suitable for weathered rock formations, employing the following technical solution:

[0007] A pipe foundation structure suitable for weathered rock formations includes multiple pipes spliced ​​and assembled in a trench and a reinforcement device set at the connection of two adjacent pipes. The reinforcement device includes a support member set at the connection of adjacent pipes and a fixing component for fixing the support member in the trench. The support member includes a support plate laid at the bottom of the trench. The support plate extends along the length of the pipe and the pipe is supported on the support plate.

[0008] By adopting the above technical solution, during the pipeline foundation construction in weathered rock strata, the connection points of two adjacent pipelines are installed on a support plate at the bottom of the trench. Due to the large contact area between the support plate and the bottom of the trench, the point contact at the pipeline connection point is transformed into a surface contact between the support plate and the trench. This distributes the weight of the two adjacent pipelines onto the support plate and then transfers it to the weathered rock strata. This avoids the pipeline connection point breaking due to the inability to effectively support the pipeline after the weathered rock strata collapses. Therefore, the support plate set in the trench can effectively support the weight of the pipeline, improving the efficiency of pipeline laying and reducing the cost of pipeline laying during the laying process.

[0009] Preferably, a bearing plate is fixed to the lower surface of the support plate, and the area of ​​the bearing plate is larger than the area of ​​the support plate.

[0010] By adopting the above technical solution, the weight supported on the support plate can be further distributed on the support plate through the larger area of ​​the support plate, and the support plate increases the stability of the pipeline and avoids dents at the pipeline connection points.

[0011] Preferably, a layer of crushed stone is laid below the bearing plate and at the bottom of the trench, and the crushed stone layer is compacted to the bottom of the trench.

[0012] By adopting the above technical solution, the crushed stone layer can form a stable base layer at the bottom of the trench, preventing the weathered rock layer at the bottom of the trench from collapsing.

[0013] Preferably, the support member further includes a pair of support baffles symmetrically and vertically fixed at both ends of the support plate. The two support baffles and the support plate form a U-shaped structure. The support baffles are supported on the side wall of the trench. The fixing component is installed on the support baffles and fixes the support baffles to the inner wall of the trench.

[0014] By adopting the above technical solution, the support baffle can be supported on the side wall of the trench, and the two support baffles and the support plate form a U-shaped structure, so that the support can be supported in the trench, preventing the rock layer at the connection of the two pipes from collapsing. The support can be firmly fixed in the trench. When the bottom of the trench collapses, the fixing component can tighten the support, allowing the support to stably support the pipe.

[0015] Preferably, a layer of quick-drying cement is sprayed on the sidewall of the trench, and the supporting baffle is supported on the quick-drying cement layer.

[0016] By adopting the above technical solution, the sidewalls on both sides of the trench are pre-reinforced to prevent the trench from collapsing during the pipeline laying process.

[0017] Preferably, the fixing components are provided in multiple sets and are evenly distributed on two support baffles. The fixing components include anchor rods that pass through the support baffles and are inserted and fixed to the sidewall of the trench.

[0018] By adopting the above technical solution, the anchor rods can be installed through the support baffle and deeply inserted into the weathered rock layers on both sides of the trench. The anchor rods are used to tighten and fix the support baffle, and to firmly fix the support components in the trench. When the bottom of the trench collapses, the pipeline can also be supported.

[0019] Preferably, the anchor rod has a hollow structure, and the fixing assembly further includes a tension rod slidably disposed in the anchor rod. Multiple tension plates are rotatably disposed on the tension rod. An opening hole is provided on the anchor rod at the position of the tension plate, allowing the tension plate to be opened from inside the anchor rod, and the tension plate can be inserted into the weathered rock layer.

[0020] By adopting the above technical solution, when fixing the support baffle, the staff can use external equipment to pull the tension rod. During the pulling process, the tension plate gradually extends from the inside of the anchor rod through the opening hole. As the tension plate extends, it can gradually be inserted into the weathered rock layer, so that the anchor rod can be stably inserted into the rock layer.

[0021] Preferably, a tensioning screw is fixed to the end of the tensioning rod, the tensioning screw extends from inside the anchor rod, a tensioning nut is rotatably fitted on the tensioning screw, the tensioning nut rotatably abuts against the end of the anchor rod, and a limiting rod is fixed inside the anchor rod away from the tensioning screw to prevent the tensioning rod from rotating, the limiting rod being slidably inserted into the tensioning rod.

[0022] By adopting the above technical solution, when controlling the tension rod to slide inside the anchor bolt, the tension nut can be rotated to press against the end of the anchor bolt. Under the action of the limiting rod, the tension rod is prevented from rotating along with the tension nut during rotation, thus keeping the tension rod in a sliding motion. This allows it to gradually slide out of the anchor bolt and ultimately control the tension plate to unfold from inside the anchor bolt. The cooperation method between the tensioning screw and the tension nut makes it easier for workers to operate, avoids the need for large mechanical equipment, and makes the installation more efficient.

[0023] Preferably, a guide block is fixed on the inner wall of the anchor rod at the position of the opening hole, the end of the tensioning plate away from its rotation point with the tensioning rod points towards the guide block, the guide block is provided with an inclined surface, and the end of the tensioning plate can abut against the guide block during sliding.

[0024] By adopting the above technical solution, when the tensioning plate unfolds from the opening hole, the end of the tensioning plate can first abut against the inclined surface of the guide block, which can guide the tensioning plate to rotate and open, so that the tensioning plate can open more smoothly and avoid the end of the tensioning plate being pressed against the opening hole and unable to open normally.

[0025] Preferably, a sealing connection assembly is provided on the support plate at the connection between two adjacent pipes. The sealing connection assembly includes a lower support fixed on the support plate and an upper support fixed to the lower support. The upper support and the lower support are connected to form a ring structure and are fixed to the connection between two adjacent pipes.

[0026] By adopting the above technical solution, during the installation process, the connection between the two pipes can be installed and fitted onto the lower support, and the two pipes can be wrapped and fixed by the upper support, which not only seals the connection between the two pipes, but also connects and fixes the ends of the two pipes.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] During the pipeline laying process, a layer of crushed stone is first set at the bottom of the trench to form a stable base layer, and cement is sprayed on the sidewalls of the trench to form a quick-drying cement layer to reinforce the sidewalls of the trench. Then, a large-area bearing plate is set at the bottom of the trench so that the support components can be installed on the bearing plate. Then the pipeline is fixed to the support components. When the weathered rock layer in the trench collapses, the various structures formed above can still stably support the pipeline and prevent the connection between two adjacent pipelines from breaking.

[0029] The anchor bolts installed on the support components can fix the support baffle, allowing the anchor bolts to be deeply inserted into the weathered rock layer on the sidewall of the trench, thus providing initial fixation for the support baffle. After the anchor bolts are installed, by rotating the tension nut, the tension rod can be gradually extended from inside the anchor bolt. During the extension process, the tension plate can be gradually unfolded from inside the anchor bolt. The unfolded tension plate can be inserted into the rock layer, thereby further reinforcing the anchor bolt and increasing the tension between the anchor bolt and the rock layer, ultimately firmly fixing the support components into the trench.

[0030] This application allows for the accurate installation of supports onto the bearing plates by setting up a layer of crushed stone, a layer of quick-drying cement, and a bearing plate inside the trench. The supports are then quickly fixed into the weathered rock layer using fixing components. The overall construction process is convenient and fast, effectively improving construction efficiency compared to existing methods of on-site concrete pouring and welding. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0032] Figure 2 This is a schematic diagram illustrating the reinforcement device and sealing connection assembly in an embodiment of this application.

[0033] Figure 3 This is a schematic diagram illustrating the fixed component in an embodiment of this application.

[0034] Figure 4 This is a cross-sectional view illustrating the fixed component in an embodiment of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Pipeline; 2. Reinforcing device; 21. Support component; 211. Support plate; 212. Bearing plate; 213. Support baffle; 22. Fixing component; 221. Anchor bolt; 222. Tensioning rod; 223. Tensioning plate; 224. Opening hole; 225. Tensioning screw; 226. Tensioning nut; 227. Limiting rod; 228. Guide block; 3. Crushed stone layer; 4. Quick-drying cement layer; 5. Sealing connection component; 51. Lower support seat; 52. Upper support seat; 53. Sealing groove; 54. Fixing bolt. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0037] This application discloses a pipe foundation structure suitable for weathered rock formations.

[0038] Reference Figure 1A pipeline foundation structure suitable for weathered rock formations includes multiple pipelines 1 laid in a trench. During the laying process, a certain length of pipeline 1 can be excavated and then a certain length of pipeline 1 can be laid to improve construction efficiency. At the connection points of adjacent pipelines 1, reinforcement devices 2 are installed to reinforce the pipelines 1. The reinforcement device 2 includes a support member 21 installed at the connection point of the two pipelines 1 and a fixing component 22 that fixes the support member 21 in the trench. During the pipeline laying process, according to the length of the prefabricated pipeline 1, the support member 21 is placed at the joint of the two pipelines 1, and the pipeline 1 is installed at the position of the support member 21. The support member 21 supports the pipeline 1, and then the fixing component 22 fixes the support member 21 in the trench to prevent collapse inside the trench of the weathered rock formation, which could cause the pipeline 1 to settle. When collapse occurs in the trench, the fixing component 22 can support the support member 21 against the sidewall of the trench, thereby providing support for the pipeline 1.

[0039] Reference Figure 1 and Figure 2 The support member 21 includes a rectangular support plate 211 laid at the bottom of the trench. The support plate 211 is located at the connection point of two adjacent pipes 1, and its width direction is set along the length direction of the pipes 1. The two adjacent pipes 1 are supported on the support plate 211. The support plate 211 transforms the point contact between the connection point of the pipes 1 and the bottom of the trench into a surface contact, increasing the contact area between the pipes 1 and the bottom of the trench. This effectively distributes the weight of the pipes 1 and prevents problems such as deformation and cracking of the pipes 1. A rectangular bearing plate 212 is fixed on the lower surface of the support plate 211. The area of ​​the bearing plate 212 is larger than that of the support plate 211. The larger area of ​​the bearing plate 212 allows the weight supported on the support plate 211 to be further distributed on the bearing plate 212. The bearing plate 212 also increases the stability of the pipes 1 and prevents dents from occurring at the connection point of the pipes 1.

[0040] A layer of crushed stone 3 is laid at the bottom of the trench. After the trench excavation is completed, the crushed stone is poured into the trench and spread out evenly. Then, a rammer is used to compact the crushed stone to form a crushed stone layer 3 of a certain thickness, forming a stable base layer at the bottom of the trench to prevent the weathered rock layer at the bottom of the trench from collapsing. After the crushed stone layer 3 is completed and before laying the pipe 1, workers spray a layer of quick-drying cement on both sides of the trench to form a quick-drying cement layer 4, which reinforces the side walls of the trench and prevents the sides of the trench from collapsing during the laying of the pipe 1.

[0041] Reference Figure 2 and Figure 3The support member 21 also includes a pair of support baffles 213 symmetrically arranged at both ends of the support plate 211. The two support baffles 213 are vertically fixed at both ends of the support plate 211, and the two support baffles 213 and the support plate 211 form a U-shaped structure. The support baffles 213 can support the side wall of the trench, and the fixing component 22 is installed on the support baffles 213 to fix the support baffles 213 to the side wall of the trench, so that the support member 21 can be firmly fixed in the trench. When the bottom of the trench collapses, the fixing component 22 can tighten the support member 21, so that the support member 21 can stably support the pipe 1.

[0042] Reference Figure 2 and Figure 4 The fixing components 22 are evenly arranged in multiple sets on the two support baffles 213. The fixing components 22 include anchor rods 221 that pass through the support baffles 213. The anchor rods 221 can be horizontally or inclinedly inserted and fixed into the weathered rock layer on the side wall of the trench. The insertion end of the anchor rod 221 is set in a pointed shape, so that the workers can easily drive the anchor rod 221 into the weathered rock layer. The support baffles 213 are fixed to the weathered rock layer by the anchor rods 221, so that the support baffles 213 are stably fixed to the weathered rock layer. Anchor bolt 221 has a hollow interior and an open end. The closed end of anchor bolt 221 is driven into the rock stratum. The fixing assembly 22 also includes a tension rod 222 disposed in anchor bolt 221. The length direction of tension rod 222 is the same as the length direction of anchor bolt 221. Tension rod 222 is slidably disposed inside anchor bolt 221. Multiple tension plates 223 are rotatably disposed on the outer wall of tension rod 222. One end of tension plate 223 is rotatably connected to tension rod 222, and tension plates 223 are disposed along the length direction of tension rod 222. In this embodiment, multiple tension plates 223 are arranged in multiple groups along the length direction of tension rod 222. Each group includes three plates. The three tension plates 223 are evenly distributed circumferentially along the axis of tension rod 222, and the three tension plates 223 are far apart from each other. The open ends of the anchor rod 221 are rotatably connected to the tension rod 222. Corresponding opening holes 224 are provided on the outer wall of the anchor rod 221 at the position of the tension plate 223. The length direction of the opening holes 224 is the same as the length direction of the anchor rod 221. After the tension plate 223 is rotated open, it can extend out from the opening holes 224. When the anchor rod 221 is driven into the rock layer, the tension rod 222 is pulled, allowing it to slide within the anchor rod 221. The tension plate 223 gradually rotates out from the opening holes 224. The end of the tension plate 223 furthest from the rotation point is set as a pointed tip. During the rotational opening process, the pointed tip of the tension plate 223 can be inserted into the rock layer, thus allowing the anchor rod 221 to be stably inserted into the weathered rock layer.

[0043] Reference Figure 2 and Figure 4A tensioning screw 225 is fixed at the end of the tensioning rod 222 near the opening of the anchor rod 221. The tensioning screw 225 is located outside the anchor rod 221, and its length direction is the same as that of the tensioning rod 222. A tensioning nut 226 is threaded onto the tensioning screw 225. The tensioning nut 226 can rotate and abut against the opening end of the anchor rod 221. A limiting rod 227 with a rectangular cross-section is fixed inside the anchor rod 221 at the end away from its opening. The length direction of the limiting rod 227 is set along the length direction of the tensioning rod 222. An insertion hole is provided on the anchor rod 222, and the limiting rod 227 can be inserted into the insertion hole. The limiting rod 227 and the tensioning rod 222 are in sliding engagement. When the tensioning rod 222 needs to be pulled, the tensioning nut 226 is rotated, and the tensioning nut 226 can press against the opening end of the anchor rod 221. Under the action of the limiting rod 227, the tensioning rod 222 is gradually pulled out from the anchor rod 221. During the sliding process of the tensioning rod 222, the tensioning plate 223 gradually moves out from inside the anchor rod 221 and rotates out from the opening hole 224, finally allowing the tensioning plate 223 to be deeply inserted into the weathered rock layer. Furthermore, a guide block 228 is fixed on the inner wall of the anchor rod 221 and at the end of the opening hole 224 near the opening of the anchor rod 221. The guide block 228 is set as an inclined surface facing the side of the tension plate 223. When the tension plate 223 unfolds from the opening hole 224, the tip of the tension plate 223 can first abut against the inclined surface of the guide block 228, which can guide the tension plate 223 to rotate and open, so that the tension plate 223 can open more smoothly and avoid the end of the tension plate 223 pressing against the opening hole 224 and unable to open normally.

[0044] Reference Figure 2 and Figure 4 A sealing connection assembly 5 is provided on the support plate 211 at the connection between two adjacent pipes 1. It includes a lower support seat 51 fixed on the support plate 211 and an upper support seat 52 detachably fixed on the lower support seat 51. Both the lower support seat 51 and the upper support seat 52 are semi-circular structures. They cooperate with each other and are fixed to the connection between the two pipes 1. Both the lower support seat 51 and the upper support seat 52 are provided with annular sealing grooves 53. The connection between the two pipes 1 can be installed and fitted into the sealing grooves 53, and the two pipes 1 can be connected and fixed. Fixing bolts 54 are inserted and fixed at the abutment position of the lower support seat 51 and the upper support seat 52. After the pipe 1 is installed on the lower support seat 51 and the upper support seat 52, the two are connected and fixed by the fixing bolts 54, which plays the role of sealing and connection.

[0045] The implementation principle of a pipeline foundation structure applicable to weathered rock strata in this application embodiment is as follows: When constructing the foundation of pipeline 1 in weathered rock strata, a layer of crushed stone 3 is laid at the bottom of the excavated trench for foundation reinforcement, and quick-drying cement is sprayed on the sidewall of the trench to form a quick-drying cement layer 4, which provides preliminary reinforcement to the sidewall of the trench. In laying pipeline 1, the construction is carried out by excavating part and laying part. According to the length of pipeline 1, a support 21 is installed at the connection position of pipeline 1, and the support 21 is fixed to the trench by a fixing component 22. Then, the connection of pipeline 1 is accurately installed on the lower support seat 51, and the upper support seat 52 is installed on the lower support seat 51 for fixation. Finally, the trench with the pipeline 1 installed is backfilled.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipeline foundation structure suitable for use in weathered rock formations, characterised in that: The application relates to a pipeline (1) spliced and assembled in a trench, and a reinforcing device (2) arranged at the joint of two adjacent pipelines (1), wherein the reinforcing device (2) comprises a support (21) arranged at the joint of the two adjacent pipelines (1) and a fixing assembly (22) for fixing the support (21) in the trench, the support (21) comprises a support plate (211) laid on the bottom of the trench, the support plate (211) extends along the length direction of the pipeline (1), and the pipeline (1) is supported on the support plate (211).

2. A pipe foundation structure suitable for use in weathered rock strata according to claim 1 characterised in that: The lower surface of the support plate (211) is fixed with a bearing plate (212), and the area of the bearing plate (212) is larger than that of the support plate (211).

3. A pipe foundation structure suitable for use in weathered rock strata according to claim 2, characterised in that: A layer of gravel (3) is laid on the bottom of the trench below the bearing plate (212), and the gravel (3) is tamped to the bottom of the trench.

4. A pipe foundation structure suitable for use in weathered rock strata according to claim 1 characterised in that: The support (21) further comprises a pair of support baffle plates (213) symmetrically and vertically fixed at the two ends of the support plate (211), the two support baffle plates (213) form a U-shaped structure with the support plate (211), the support baffle plates (213) are supported on the side wall of the trench, the fixing assembly (22) is mounted on the support baffle plates (213) and fixes the support baffle plates (213) to the inner wall of the trench.

5. A pipe foundation structure suitable for use in weathered rock strata according to claim 4 wherein: A layer of quick-drying cement (4) is sprayed on the side wall of the trench, and the support baffle plates (213) are supported on the quick-drying cement (4).

6. A pipe foundation structure suitable for use in weathered rock strata according to claim 1 characterised in that: The fixing assembly (22) is provided with multiple groups and is uniformly arranged on the two support baffle plates (213), the fixing assembly (22) comprises an anchor rod (221) penetrating through the support baffle plate (213) and being fixedly connected to the side wall of the trench.

7. A pipe foundation structure suitable for use in weathered rock strata according to claim 6 wherein: The anchor rod (221) is a hollow structure, the fixing assembly (22) further comprises a tension rod (222) slidingly arranged in the anchor rod (221), a plurality of tension plates (223) are rotationally arranged on the tension rod (222), the anchor rod (221) is provided with an opening hole (224) at the position of the tension plate (223) for opening the tension plate (223) from the inside of the anchor rod (221), and the tension plate (223) can be inserted into the weathered rock layer.

8. A pipe foundation structure suitable for use in weathered rock strata according to claim 7, characterised in that: The end of the tension rod (222) is fixed with a tension screw (225) which extends from the inside of the anchor rod (221), a tension nut (226) is rotationally matched on the tension screw (225) and rotationally abuts to the end of the anchor rod (221), a limiting rod (227) for preventing the rotation of the tension rod (222) is fixed in the inside of the anchor rod (221) and away from the end of the tension screw (225), and the limiting rod (227) is slidingly and insertingly matched on the tension rod (222).

9. A pipe foundation structure suitable for use in weathered rock strata according to claim 7, characterised in that: A guide block (228) is fixed on the inner wall of the anchor rod (221) and located at the position of the opening (224), the end of the tensioning plate (223) away from the rotating point with the tensioning rod (222) points to the guide block (228), the guide block (228) is provided with an inclined surface, and the end of the tensioning plate (223) can abut on the guide block (228) during sliding.

10. A pipe foundation structure suitable for use in weathered rock strata according to claim 1 characterised in that: A sealing connection assembly (5) is arranged on the support plate (211) and adjacent to the connection of two adjacent pipelines (1), the sealing connection assembly (5) comprises a lower support base (51) fixed on the support plate (211) and an upper support base (52) detachably fixed on the lower support base (51), and the upper support base (52) and the lower support base (51) are connected into an annular structure and are fixed around the connection of the two adjacent pipelines (1).

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