Water-stopping repair structure and repair method for pipelines with deep burial depth and high groundwater level that are difficult to dewater

Abstract

The present invention discloses a water-stopping and repairing structure for a pipeline with a large buried depth and a high groundwater level that is difficult to be drained. It includes a diversion pump, a pipeline plugging device, a liquid nitrogen cooling device, a cooling hose, a diversion pipeline, a pipe making machine and a water pump; the diversion pump, the pipeline plugging device, the pipe making machine and the water pump are all arranged in the existing pipeline; an inspection well is arranged on the existing pipeline, and the existing pipeline is connected to the inspection well; the inspection wells include a first inspection well, a second inspection well, a third inspection well and a fourth inspection well; the diversion pump is located below the first inspection well; the water pump is located below the third inspection well; one end of the cooling hose is connected to the liquid nitrogen cooling device, and the other end passes through the second inspection well and is located in the area to be repaired in the existing pipeline; the pipe making machine is located in the area to be repaired. The present invention has the function of being able to repair the drainage pipeline in a full water state, with high efficiency and good repair effect. The present invention also discloses a repairing method for the water-stopping and repairing structure for a pipeline with a large buried depth and a high groundwater level that is difficult to be drained.

Description

Technical Field

[0001] The present invention relates to the field of municipal engineering technology, and more specifically to a water-stopping and repairing structure for pipelines with deep burial depths and high groundwater levels that are difficult to drain. The present invention also relates to a repairing method for the water-stopping and repairing structure for pipelines with deep burial depths and high groundwater levels that are difficult to drain. Background Art

[0002] CCTV, QV and other technologies are often used to detect drainage pipes, and CIPP is often used for trenchless repairs. These technologies require that there is no water in the pipe or the water level is low. In projects, we often encounter situations where the buried depth is large, the groundwater level is high, or the pipe runs through the river, the flow rate is high, the groundwater infiltration is large, and the water in the pipe cannot be drained after plugging, forming a difficult pipe section. This type of pipe section has serious external water infiltration and is difficult to drain (that is, it cannot be drained after a long period of pumping (12 hours) by a water pump, and the liquid level in the pipe remains unchanged). At present, all repair processes require waterless operations or operations under conditions of a small amount of water, and repair work cannot be carried out under full water conditions.

[0003] Therefore, it is necessary to develop a water-stopping and repair structure and method for pipelines with deep burial depth, high groundwater level and difficulty in dewatering. Summary of the invention

[0004] The first purpose of the present invention is to provide a water-stopping and repairing structure for pipelines with great burial depth, high groundwater level and difficulty in dewatering, which can repair drainage pipelines in a full water state with high efficiency and good repair effect; and solves the problem of repairing pipelines with great burial depth and high water level.

[0005] The second purpose of the present invention is to provide a repair method for the water-stopping repair structure of the pipeline with a large burial depth, high groundwater level and difficulty in dewatering.

[0006] In order to achieve the first object of the present invention, the technical solution of the present invention is: a water-stopping and repairing structure for pipelines with large buried depth and high groundwater level that are difficult to dewater, characterized by: comprising a diversion pump, a pipeline plugging device, a liquid nitrogen cooling device, a cooling hose, a diversion pipeline, a pipe making machine and a water pump;

[0007] The diversion pump, pipeline plugging device, pipe making machine and water pump are all installed in the existing pipeline;

[0008] An inspection well is set on the existing pipeline, and the existing pipeline is connected to the inspection well;

[0009] The inspection wells include a first inspection well, a second inspection well, a third inspection well and a fourth inspection well; the first inspection well, the second inspection well, the third inspection well and the fourth inspection well are sequentially arranged on the existing pipeline from downstream to upstream;

[0010] The diversion pump is located below the first inspection well and is connected to the fourth inspection well through a diversion pipeline;

[0011] The water pump is located below the third inspection well and is connected to the fourth inspection well through a diversion pipe;

[0012] One end of the cooling hose is connected to the liquid nitrogen cooling device, and the other end passes through the second inspection well and is located in the area to be repaired in the existing pipeline;

[0013] The pipe making machine is located in the area to be repaired.

[0014] In the above technical solution, an infrared quartz heating lamp is arranged at the front end of the pipe making machine.

[0015] In the above technical solution, the pipeline blocking device is at least selected from an air bag, a plug, and brickwork.

[0016] In the above technical solution, the pipeline plugging device includes a first pipeline plugging device and a second pipeline plugging device.

[0017] The first pipeline plugging device is located between the first inspection well and the second inspection well, and is arranged adjacent to the first inspection well;

[0018] The second pipeline plugging device is located between the third inspection well and the fourth inspection well, and is arranged adjacent to the third inspection well.

[0019] In the above technical solution, the pipe making machine is an expansion spiral pipe winding machine.

[0020] In order to achieve the second purpose of the present invention, the technical solution of the present invention is: the repair method of the water-stopping repair structure of the deep buried high groundwater level difficult to dewater pipeline is characterized by comprising the following steps:

[0021] Step 1: Pipeline plugging is performed by means of a pipeline plugging device;

[0022] Step 2: Set up a diversion pump for drainage;

[0023] Step 3: Use the platypus to pull the cooling hose to the area to be repaired;

[0024] Step 4: Turn on the liquid nitrogen device to freeze the water in the area to be repaired in the existing pipeline;

[0025] Step 5: After the area to be repaired in the existing pipeline is completely frozen, forming a frozen area, drain the water in the inspection well;

[0026] Step 6: Install a water pump in the inspection well, install a pipe making machine, and add an infrared quartz heating lamp to the machine head;

[0027] Step 7: Turn on the infrared quartz heating lamp to melt the icicles in the frozen area layer by layer through heating. At the same time, the pipe making machine slowly moves forward to prepare the spiral pipe. After the melted water enters the inspection well, it is pumped out by the water pump.

[0028] Step 8: When the icicles in the frozen area melt too quickly during the preparation of the spiral tube, liquid nitrogen is added to the liquid nitrogen cooling device to cool and freeze again;

[0029] Step 9: After the repair is completed, grouting is performed in the gap between the repaired spiral pipe and the existing pipeline to form a unified whole with the existing pipeline.

[0030] The great burial depth and high groundwater level in the present invention refer to that the pipeline burial depth exceeds 3m and the groundwater level is above the top of the pipe.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] (1) It can repair drainage pipes when they are full of water (current technology only allows 20% water accumulation in the pipes), with high efficiency and good repair effect; it can solve the repair problem of pipe sections with large buried depths and high groundwater levels, and is particularly suitable for trenchless repair of pipes such as river crossing pipes and inverted siphon pipes that are deep, have high infiltration, and cannot be pumped out by water pumps;

[0033] (2) Adopting freezing water stop (freezing inside the pipe to prevent groundwater infiltration and achieve full water repair of the drainage pipe without ground drilling operation), which is environmentally friendly and pollution-free;

[0034] (3) No civil construction is required, easy to operate;

[0035] (4) The construction process of the expanded spiral winding method is improved to prevent infiltration;

[0036] (5) It not only strengthens the pipeline, but also prevents pipeline leakage and foreign objects such as tree roots from penetrating, thereby increasing the service life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is an implementation flow chart of the present invention.

[0038] Figure 2 It is a construction schematic diagram of the present invention.

[0039] In the figure, 1-inspection well, 1-1-first inspection well, 1-2-second inspection well, 1-3-third inspection well, 1-4-fourth inspection well, 2-existing pipeline, 3-diversion pump, 4-pipeline plugging device, 4-1-first pipeline plugging device, 4-2-second pipeline plugging device, 5-liquid nitrogen cooling device, 6-cooling hose, 7-diversion pipeline, 8-pipe making machine, 9-spiral winding pipe substrate, 10-water pump, 11-freezing area, 12-infrared quartz heating lamp. DETAILED DESCRIPTION

[0040] The following is a detailed description of the implementation of the present invention in conjunction with the accompanying drawings, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention are made clearer and easier to understand through the description.

[0041] See attached Figure 2 It can be seen that: a water-stopping and repairing structure for pipelines with deep burial depth and high groundwater level that are difficult to dewater comprises a diversion pump 3, a pipeline plugging device 4, a liquid nitrogen cooling device 5, a cooling hose 6, a diversion pipeline 7, a pipe making machine 8 and a water pump 10;

[0042] The diversion pump 3, the pipeline plugging device 4, the pipe making machine 8 and the water pump 10 are all arranged in the existing pipeline 2;

[0043] An inspection well 1 is arranged on the existing pipeline 2, and the existing pipeline 2 is connected with the inspection well 1, so that the diversion pipeline 7 is connected with the diversion pump 3 and the fourth inspection well 1-4, and the water in the existing pipeline 2 is discharged to the downstream of the area to be repaired through the fourth inspection well 1-4; and the liquid nitrogen cooling device 5 is convenient for freezing the area to be repaired through the cooling hose 6; and the diversion pipeline 7 is convenient for connecting the water pump 10 and the fourth inspection well 1-4, and the water melted in the frozen area 11 is discharged to the downstream of the area to be repaired through the fourth inspection well 1-4;

[0044] The inspection well 1 includes a first inspection well 1-1, a second inspection well 1-2, a third inspection well 1-3 and a fourth inspection well 1-4; the first inspection well 1-1, the second inspection well 1-2, the third inspection well 1-3 and the fourth inspection well 1-4 are sequentially arranged on the existing pipeline 2 from downstream to upstream;

[0045] The diversion pump 3 is located below the first inspection well 1-1 and is connected to the fourth inspection well 1-4 through the diversion pipe 7;

[0046] The water pump 10 is located below the third inspection well 1-3 and is connected to the fourth inspection well 1-4 through the diversion pipe 7; the diversion pipe 7 connects the water pump 10 and the fourth inspection well 1-4, and discharges the melted water in the frozen area 11 to the downstream of the area to be repaired through the fourth inspection well 1-4, and can also be used to discharge the accumulated water in the area to be repaired;

[0047] One end of the cooling hose 6 is connected to the liquid nitrogen cooling device 5, and the other end passes through the second inspection well 1-2 and is located in the area to be repaired in the existing pipeline 2 (that is, in the existing pipeline 2 between the second inspection well 1-2 and the third inspection well 1-3); it is used to freeze the water in the area to be repaired in the existing pipeline 2;

[0048] The pipe making machine 8 is located in the area to be repaired and is used to prepare spiral pipes and repair the existing pipeline 2.

[0049] Furthermore, an infrared quartz heating lamp 12 is provided at the front end of the pipe making machine 8 for heating the frozen area and melting the icicles layer by layer.

[0050] Furthermore, the pipeline plugging device 4 is at least selected from an air bag, a plug, and brickwork to ensure the plugging effect.

[0051] Furthermore, the pipeline plugging device 4 includes a first pipeline plugging device 4-1 and a second pipeline plugging device 4-2.

[0052] The first pipeline plugging device 4-1 is located between the first inspection well 1-1 and the second inspection well 1-2, and is disposed adjacent to the first inspection well 1-1;

[0053] The second pipeline plugging device 4-2 is located between the third inspection well 1-3 and the fourth inspection well 1-4, and is arranged near the third inspection well 1-3; it isolates the area to be repaired to prevent the water from the upstream of the existing pipeline 2 from entering the area to be repaired and affecting the repair effect;

[0054] The diversion pump 3 is located upstream of the first pipeline plugging device 4-1, and pumps the upstream water to the downstream through the diversion pipeline 7 to ensure the normal progress of the repair work;

[0055] The water pump 10 is located upstream of the second pipeline plugging device 4-2, and pumps the melted water in the frozen area to the downstream through the diversion pipeline 7 to ensure the normal progress of the repair work.

[0056] Furthermore, the pipe making machine 8 uses an expansion spiral pipe winding machine with high pipe making efficiency; the pipe making machine 8 is connected to the spirally wound pipe substrate 9.

[0057] See attached Figure 1 and Figure 2 It can be seen that the repair method of the water-stopping repair structure of the deep buried high groundwater level difficult to dewater pipeline is characterized by comprising the following steps:

[0058] Step 1: Block the pipeline by using a pipeline blocking device 4 (e.g., air bag, plug, brickwork, etc.);

[0059] Step 2: Setting a diversion pump 3 for diversion;

[0060] Step 3: Use the platypus to pull the cooling hose 6 to the area to be repaired;

[0061] Step 4: Turn on the liquid nitrogen device to freeze the water in the area to be repaired in the existing pipeline 2;

[0062] Step 5: After the area to be repaired in the existing pipeline 2 is completely frozen to form a frozen area 11, the accumulated water in the inspection well 1 is drained;

[0063] Step 6: Install a water pump 10 in the inspection well 1, install the pipe making machine 8, and add an infrared quartz heating lamp 12 to the machine head;

[0064] Step 7: Turn on the infrared quartz heating lamp 12 to melt the icicles in the frozen area 11 layer by layer by heating, and at the same time, the pipe making machine 8 slowly moves forward to prepare the spiral pipe; after the melted water enters the inspection well 1, it is pumped out by the water pump 10;

[0065] Step 8: When the icicles in the frozen area 11 melt too quickly during the preparation of the spiral tube, liquid nitrogen is added to the liquid nitrogen cooling device 5 to cool and freeze again;

[0066] Step 9: After the repair is completed, grouting is performed at the gap between the repaired spiral pipe and the existing pipeline 2 to form a unified whole with the spiral pipe.

[0067] Example

[0068] The present invention is now described in detail by taking the application of the present invention to the water-stopping repair of a river-crossing pipeline in a certain project as an example, which also has a guiding role in the application of the present invention to the water-stopping repair of other pipelines with large burial depths and high groundwater levels.

[0069] The buried depth of the river-penetrating pipeline in this embodiment is more than about 5 m, and the groundwater level is above the top of the river-penetrating pipeline.

[0070] In this embodiment, a method for repairing water stopping of a river-crossing pipeline in a certain project includes the following steps:

[0071] First, the existing upstream and downstream pipelines 2 are blocked by using the pipeline blocking device 4, and the pipeline blocking device 4 is built in a brick-laying manner;

[0072] Then, a diversion pump 3 and a diversion pipe 7 are provided to divert the upstream water into the downstream fourth inspection well 1-4;

[0073] Then, the cooling hose 6 is pulled into the existing pipeline 2 by the platypus; the liquid nitrogen cooling device 5 is turned on to freeze the water in the existing pipeline 2 to form a frozen area 11. The liquid nitrogen cooling device 5 adopts a finished device; after freezing, a water pump 10 is set in the third inspection well 1-3 downstream to drain the sewage in the inspection well, and a pipe making machine 8 (i.e., a spiral winding pipe making machine) is installed. The pipe making machine 8 adopts a finished device, and an infrared quartz heating lamp 12 is added in front of the machine head; the infrared quartz heating lamp 12 and the pipe making machine 8 are turned on, and the frozen icicles in the frozen area 11 are melted under the heating of the infrared quartz heating lamp 12, and the water flows into the inspection well and is discharged through the water pump 10. After the frozen area 11 melts a certain distance, the pipe making machine 8 moves forward to repair the pipeline and prepare the spiral pipe;

[0074] Repeat this process until the repair is complete.

[0075] After the repair is completed, according to the requirements of the spiral winding method, grouting reinforcement is carried out at the gap between the spiral pipe and the existing pipeline 2. The specific materials and requirements are adopted in accordance with the relevant requirements of the spiral winding method.

[0076] Conclusion: This embodiment can prevent groundwater infiltration by freezing the inside of the pipeline, and realize full water repair of the pipeline, with high efficiency and good repair effect, without the need for ground drilling operations or civil construction, easy operation, and environmental protection and no pollution.

[0077] Other parts not described belong to the prior art.

Claims

1. A water-stopping and repairing structure for pipelines with deep burial depth and high groundwater level that are difficult to dewater, characterized by: It comprises a flow guide pump (3), a pipeline plugging device (4), a liquid nitrogen cooling device (5), a cooling hose (6), a flow guide pipeline (7), a pipe making machine (8) and a water pump (10); The flow guide pump (3), the pipeline plugging device (4), the pipe making machine (8) and the water pump (10) are all arranged in the existing pipeline (2); An inspection well (1) is arranged on the existing pipeline (2), and the existing pipeline (2) is connected to the inspection well (1); The inspection well (1) comprises a first inspection well (1-1), a second inspection well (1-2), a third inspection well (1-3) and a fourth inspection well (1-4); the first inspection well (1-1), the second inspection well (1-2), the third inspection well (1-3) and the fourth inspection well (1-4) are arranged in sequence from upstream to downstream; The diversion pump (3) is located below the first inspection well (1-1) and is connected to the fourth inspection well (1-4) through a diversion pipeline (7); The water pump (10) is located below the third inspection well (1-3) and is connected to the fourth inspection well (1-4) through a diversion pipe (7); One end of the cooling hose (6) is connected to the liquid nitrogen cooling device (5), and the other end passes through the second inspection well (1-2) and the area to be repaired located in the existing pipeline (2); The pipe making machine (8) is located in the area to be repaired; An infrared quartz heating lamp (12) is arranged at the front end of the tube making machine (8); The water-stopping repair structure can repair the drainage pipe in a full-water state, and is suitable for trenchless repair of pipes with great burial depth, high infiltration volume, and water pumps that cannot pump out precipitation.

2. The waterproof repair structure for deep buried high groundwater difficult to dewater pipelines according to claim 1 is characterized by: The deep burial depth and high groundwater level refer to the pipeline being buried more than 3m and the groundwater level being above the top of the pipe.

3. The waterproof repair structure for deep buried high groundwater difficult to dewater pipelines according to claim 1 is characterized by: The pipeline plugging device (4) is at least selected from an air bag, a plug, and brickwork.

4. The waterproof repair structure for deep buried high groundwater difficult to dewater pipelines according to claim 1 is characterized by: The pipeline plugging device (4) comprises a first pipeline plugging device (4-1) and a second pipeline plugging device (4-2). The first pipeline plugging device (4-1) is located between the first inspection well (1-1) and the second inspection well (1-2), and is arranged adjacent to the first inspection well (1-1); The second pipeline plugging device (4-2) is located between the third inspection well (1-3) and the fourth inspection well (1-4), and is arranged adjacent to the third inspection well (1-3).

5. The waterproof repair structure for deep buried high groundwater difficult to dewater pipelines according to claim 1 is characterized by: The tube making machine (8) is an expansion spiral tube winding machine.

6. The repair method of the water-stopping repair structure for pipelines with a deep burial depth and a high groundwater level that is difficult to dewater according to any one of claims 1 to 5, characterized in that: The following steps are included: Step 1: sealing the pipeline using the pipeline sealing device (4); Step 2: Setting a diversion pump (3) for diversion; Step 3: Use the platypus to pull the cooling hose (6) to the area to be repaired; Step 4: Turn on the liquid nitrogen device to freeze the water in the area to be repaired in the existing pipeline (2); Step 5: After the area to be repaired in the existing pipeline (2) is completely frozen to form a frozen area (11), the accumulated water in the inspection well (1) is drained; Step 6: Install a water pump (10) in the inspection well (1), install a pipe making machine (8), and add an infrared quartz heating lamp (12) to the machine head; Step 7: Turn on the infrared quartz heating lamp (12) to melt the icicles in the frozen area (11) layer by layer by heating, while the pipe making machine (8) slowly moves forward to prepare the spiral pipe; after the melted water enters the inspection well (1), it is pumped out by the water pump (10); Step 8: When the icicles in the frozen area (11) melt too quickly during the preparation of the spiral tube, liquid nitrogen is added to the liquid nitrogen cooling device (5) to cool and freeze again; Step 9: After the repair is completed, grouting is performed at the gap between the repaired spiral pipe and the existing pipeline (2) so that the spiral pipe and the existing pipeline (2) form a unified whole.

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