Modular pipeline repair lining structure and construction method thereof

Abstract

The invention relates to the technical field of pipeline repair, in particular to a construction method of a modular pipeline repair lining structure, which comprises the following steps: penetrating a lining into an existing pipeline and injecting a grouting material into a filling cavity between the lining and the existing pipeline, arranging a plurality of outer support devices on the outer wall of the lining, and forming through holes in the outer wall of the lining; the lining is inserted into the existing pipeline, vertical working wells are excavated in the length direction of the existing pipeline at intervals, the lining comprises a plurality of pipe sections, the existing pipeline in the working wells is cut off, the cut-off length is larger than the length of the pipe sections, and the pipe sections are put down from the working wells, then penetrate into the existing pipeline and are sequentially connected. The invention further relates to a modular pipeline repair lining structure. The pipeline repairing lining has the effect that the lining can be easily installed in an existing pipeline in the pipeline repairing process.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline repair, and in particular to a modular pipeline repair lining structure and a construction method thereof. Background Art

[0002] Pipeline repair is a technology that restores the function of a pipeline after it has been damaged due to the scouring and corrosion of the liquid medium during long-term use. Pipeline repair can be repaired by excavating and replacing new pipes for underground pipelines. However, re-excavation results in a long working cycle, a large amount of engineering, and also affects production and life on the ground. Pipeline repair can also be carried out by non-excavation methods. The non-excavation method generally requires excavating working wells at intervals of 20-30 meters. The working wells are vertically downward to the depth of the pipeline, and then the pipeline is cut off at the location of the working well. Then the lining is inserted from the inside of the existing pipeline in the working well, so that the lining assumes the waterproofness and corrosion resistance of the pipeline. However, when the lining needs to be supported by the existing pipeline, the lining fits the inner wall of the existing pipeline, making it difficult to construct the lining. Summary of the invention

[0003] In order to facilitate the installation of the liner into the interior of an existing pipeline during pipeline repair, the present application provides a modular pipeline repair liner structure and a construction method thereof.

[0004] The present application provides a modular pipeline repair lining structure and a construction method thereof, which adopts the following technical solutions: A construction method for a modular pipeline repair lining structure includes inserting a lining into an existing pipeline and injecting grouting material into a filling cavity between the lining and the existing pipeline, a plurality of external support devices are arranged on the outer wall of the lining, and a through hole is opened on the outer wall of the lining; inserting the lining into the existing pipeline includes first excavating vertical working wells at intervals in the length direction of the existing pipeline, the lining includes a plurality of pipe sections, the existing pipeline in the working well is cut off, the cut length is greater than the length of the pipe section, the pipe section is lowered from the working well, inserted into the existing pipeline and connected in sequence.

[0005] By adopting the above technical scheme, when in use, vertical working wells are first excavated at intervals in the length direction of the existing pipeline to facilitate the delivery of the liner to the position of the existing pipeline. Then, the pipe section with an inner dimension smaller than that of the existing pipeline is directly placed inside the existing pipeline. Then, multiple pipelines are connected in sequence to make the installation of the liner more convenient. Then, grouting material is injected into the filling cavity formed between the existing pipeline and the liner. After the grouting material solidifies, the liner and the existing pipeline can form a mutually supporting unified whole.

[0006] Preferably, the pipe segment includes multiple pipe segments, and each pipe segment may include three or four pipe segments. A connecting plate and a rib plate are fixedly provided on the outer wall of each pipe segment. The connecting plate is provided at both ends of the arc of the pipe segment. Connecting bolts are provided on two adjacent connecting plates. The rib plate is arranged in an arc shape along the side wall of the pipe segment. A connecting screw is provided between two adjacent pipe segments, and one end of the connecting screw is fixedly connected to the rib plate on one pipe segment, and the other end passes through the rib plate on the adjacent pipe segment and is threadedly connected with a nut.

[0007] By adopting the above technical solution, since the pipe section is divided into multiple segments and the segments are assembled in the existing pipeline, the size of the pipe section before assembly is further reduced, and the size and excavation amount of the vertical working pit can be reduced. First, a vertical working pit is excavated in the length direction of the existing pipeline, so that the lining pipe sections are sequentially sent from the position of the working pit into the existing pipeline, which facilitates the installation of the lining.

[0008] Preferably, the external support device includes a threaded sleeve and a bolt. The threaded sleeve is arranged along the radial direction of the pipe section. One end of the threaded sleeve is fixed on the outer wall of the pipe section. The bolt is threadedly connected to one end of the threaded sleeve away from the pipe section. The end of the bolt located outside the threaded sleeve is used to abut against the inner wall of the existing pipe.

[0009] By adopting the above technical solution, the threaded sleeve is fixed on the pipe section, and then the bolt is rotated so that one end of the bolt abuts against the inner wall of the existing pipeline, so that the pipe section can be fixed by the external support device.

[0010] Preferably, the method further includes filling the medium into the interior of the liner, wherein the through hole is located at a position on the liner corresponding to the external support device, and the through hole is connected to the interior of the external support device. During the process of filling the medium into the interior of the liner, the medium enters the external support device through the through hole, and the external support device is expanded by force to make the center line of the liner coincide with the center line of the existing pipe; when the grouting material flows into the filling cavity between the liner and the existing pipe, the pressure is maintained in the liner.

[0011] By adopting the above technical scheme, when the medium is filled into the liner, the medium can support the inside of the liner and also expand the external support device. The external support device is arranged around the liner. When the external support device supports the liner, the filling cavity can be arranged more evenly around the liner. Then, when the grouting material is filled into the filling cavity, the pressure of the grouting material is resisted by the medium pressure inside the liner, thereby reducing the extrusion deformation of the liner during the pipeline repair process. At the same time, after the grouting material solidifies, since the grouting material is around the liner, the grouting material will form a fixed ring shape and will not squeeze and deform the liner.

[0012] Preferably, stirrups are provided on the outside of the lining, and the stirrups are first wrapped around the outside of the lining before the lining passes through the existing pipe, and the stirrups are annular with ends staggered with each other. After the diameter of the stirrups is adjusted, a gap of 1-2 cm is maintained with the outer wall of the lining. A connecting wire is fixedly provided on the external support device, one end of the connecting wire is fixed at a position of the external support device away from the lining, and the other end is fixed on the stirrups. As the external support device expands, the connecting wire drives the stirrups to open and adjust the diameter of the stirrups.

[0013] By adopting the above technical solution, stirrups are arranged on the outside of the lining. When the stirrups maintain a gap of 1-2 cm with the outer wall of the lining, the grouting material in the filling cavity can cooperate with the stirrups to form a larger structural strength, which has a supporting effect on the lining and improves the internal pressure resistance of the lining. One end of the connecting wire is fixed to the external support device, and the other end is fixed to the stirrups. When the external support device is not expanded, the stirrups embrace the outer wall of the lining under the action of their own elasticity. When the external support device expands, the external support device opens the stirrups through the connecting wire to adjust the diameter of the stirrups, which is convenient for the installation of the stirrups.

[0014] Preferably, after the medium is filled into the interior of the lining, a grouting pipe and an exhaust pipe are inserted from the end of the filling cavity, and both ends of the filling cavity are sealed. The grouting pipe and the exhaust pipe are both located at the upper part of the inner filling cavity. Grouting material is injected into the filling cavity through the grouting pipe, and the gas in the filling cavity is discharged through the exhaust pipe.

[0015] By adopting the above technical solution, a grouting pipe and an exhaust pipe are inserted into the filling cavity, grouting material is injected into the grouting pipe, and the exhaust pipe exhausts the gas in the filling cavity, so that the grouting material can fill the filling cavity.

[0016] Preferably, in the process of injecting grouting material into the filling cavity between the lining and the existing pipeline, the grouting equipment is first connected to one end of the grouting pipe, and then the grouting material is introduced into the grouting pipe, so that the exhaust pipe discharges the air. The process stops when the exhaust pipe discharges the grouting material, and then the grouting pipe and the exhaust pipe are pulled along the length direction of the existing pipeline, and the grouting material is injected into the grouting pipe again, so that the exhaust pipe discharges the grouting material and then exhausts the air, and stops when the grouting material is discharged again directly. The filling cavity is filled with grouting material multiple times in sequence, and an intermediate layer is formed after the grouting material solidifies.

[0017] By adopting the above technical solution, grouting material is first injected into the filling cavity from one end of the existing pipeline through the grouting pipe. When the grouting material flows out from the exhaust pipe, the grouting material fills a section of the filling cavity. Then the grouting pipe and the exhaust pipe are moved to an unfilled position. The movement resistance of the grouting pipe and the exhaust pipe is relatively small. At this time, grouting is performed again, and the filling situation of the grouting material is observed from the exhaust pipe, which facilitates the filling of the filling cavity in the length direction.

[0018] Preferably, the method further includes performing secondary grouting on the middle layer, including drilling a hole in the external support device from the position of the through hole, and then inserting a slurry outlet head connected to the grouting equipment between the external support device and the middle layer, so that the external support device is peeled off from the middle layer and fills the gap between the middle layer and the inner lining and the existing pipeline.

[0019] By adopting the above technical solution, the middle layer may form a gap between the inner lining and the existing pipeline during the solidification process. By drilling a hole at the position of the external support device and inserting the outer side of the external support device from the position of the through hole, secondary grouting is performed on the outer and inner sides of the middle layer to make the connection between the inner lining, the middle layer and the existing pipeline tighter and improve the compressive resistance.

[0020] Preferably, the middle layer is subjected to secondary grouting and solidification to form a filling portion, and then a hole is drilled at the position of the through hole and entered into the filling portion to form a mounting hole, an expansion bolt is arranged in the mounting hole, the expansion bolt is fixed in the mounting hole, and the expansion bolt and the inner wall of the mounting hole are filled with sealant.

[0021] By adopting the above technical solution, a mounting hole is drilled at the position of the through hole, and is connected to the mounting hole through an expansion bolt, and a sealant is provided between the expansion bolt and the mounting hole, so that the position of the mounting hole can be sealed.

[0022] The present application also provides a modular pipeline repair lining structure, which adopts the following technical solution: A modular pipeline repair lining structure comprises an existing pipeline and a lining, wherein the lining is located inside the existing pipeline, and an intermediate layer is arranged between the lining and the existing pipeline.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the grouting material is filled into the filling cavity, the pressure of the grouting material is resisted by the medium pressure inside the lining, thus reducing the extrusion and deformation of the lining during the pipeline repair process; 2. When the external support device is not expanded, the stirrups are held on the outer wall of the lining by their own elasticity. When the external support device is expanded, the external support device opens the stirrups through the connecting wire to adjust the diameter of the stirrups, which is convenient for the installation of the stirrups; 3. By inserting a grouting pipe and an exhaust pipe into the filling cavity, injecting grouting material into the grouting pipe, and exhausting the gas in the filling cavity through the exhaust pipe, the filling cavity can be filled with grouting material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure in which the liner is located in an existing pipeline in the first embodiment of the present application; Figure 2 This is a schematic diagram of the structure in which the liner is located in an existing pipeline in the second embodiment of the present application; Figure 3is a schematic diagram of the arrangement position of the external support device in the second embodiment of the present application; Figure 4 is a schematic diagram of the position of the supporting device in the second embodiment of the present application; Figure 5 This is a schematic diagram of the structure of completing the injection of grouting material in Example 2 of the present application; Figure 6 It is a schematic diagram of the secondary grouting process of the grouting head in the second embodiment of the present application; Figure 7 It is a schematic diagram of the connection structure of the expansion bolts in the second embodiment of the present application.

[0025] Explanation of the reference numerals: 1. existing pipeline; 2. lining; 21. pipe section; 211. through hole; 212. pipe segment; 213. connecting plate; 214. rib plate; 22. connecting screw; 23. stirrup; 3. filling cavity; 4. supporting device; 41. supporting frame; 42. roller; 5. external supporting device; 6. connecting line; 71. grouting pipe; 72. exhaust pipe; 8. grouting head; 9. mounting hole; 91. expansion bolt; 92. sealant. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-7 This application is described in further detail.

[0027] Embodiment 1: This embodiment discloses a construction method of a modular pipeline repair lining structure, referring to Figure 1 , including inserting the liner 2 into the existing pipeline 1 and injecting grouting material into the filling cavity 3 between the liner 2 and the existing pipeline 1.

[0028] When inserting the lining 2 into the existing pipeline 1, first dig a vertical working well at a distance of 20-30 meters in the length direction of the existing pipeline 1, the depth of the working well reaches the position of the existing pipeline 1, and the existing pipeline 1 is cut off from the position of the working well. The lining 2 includes a plurality of pipe sections 21, each of which has an equal length, and the length of the working well cutoff is at least greater than the length of one pipe section 21. A through hole 211 is opened on the peripheral wall of the pipe section 21. Multiple through holes 211 can be set, or one through hole 211 can be set. The through hole 211 should be arranged in the upper position of the lining as much as possible. The pipe section 21 includes a plurality of pipe segments 212, and each pipe section 21 can include three or four pipe segments 212. A circular pipe section 21 is formed by multiple pipe segments 212. A connecting plate 213 and a rib plate 214 are fixedly provided on the outer wall of each tube segment 212. The connecting plates 213 are provided at both ends of the arc of the tube segment 212, and the connecting plates 213 are provided along the side edges of the ends of the tube segment 212. When two adjacent tube segments 212 are spliced ​​with each other, the connecting plates 213 on the two tube segments 212 are arranged opposite to each other, and connecting bolts are provided on the two connecting plates 213. The two connecting plates 213 are fixed by the connecting bolts, so that the connecting parts of the two tube segments 212 are fixedly connected. The rib plate 214 is arranged in an arc along the side wall of the tube segment 212, and the rib plate 214 is parallel to the arc of the tube segment 212. A connecting screw 22 is provided between two adjacent pipe sections 21. One end of the connecting screw 22 can be fixedly connected to the rib plate 214 on one pipe section 21 by welding, and the other end passes through the rib plate 214 on the adjacent pipe section 21 and is threadedly connected with a nut, so that the two adjacent pipe sections 21 are fixedly connected by the connecting screw 22.

[0029] In order to prevent the connected liner 2 from moving in the existing pipeline 1, a plurality of external support devices 5 are further arranged on the outer wall of the pipe section 21. Each external support device 5 includes a threaded sleeve and a bolt. The threaded sleeve is arranged along the radial direction of the pipe section 21. One end of the threaded sleeve is welded and fixed on the outer wall of the pipe section 21. The bolt is threadedly connected to the end of the threaded sleeve away from the pipe section 21. The end of the bolt located outside the threaded sleeve is used to abut against the inner wall of the existing pipeline 1. During installation, the pipe section 21 is first connected to the adjacent pipe section 21, and then the bolt is rotated to abut against the inner wall of the existing pipeline 1, so that the periphery of the pipe section 21 can be fixed on the existing pipeline 1, so that the pipe section 21 is fixed to the existing pipeline 1. In order to facilitate the adjustment of the external support device 5, multiple external support devices 5 are arranged on one side of the pipe section 21 and can be distributed within a 90-degree angle of the circumference of the pipe section 21. The external support device 5 is arranged at a position obliquely above or in an area directly above the pipe section 21, so that the side of the pipe section 21 away from the external support device 5 abuts against the inner wall of the existing pipe 1. A filling cavity 3 is formed by a gap between the lining 2 formed by the pipe section 21 and the inner wall of the existing pipe 1.

[0030] Inject grouting material into the filling cavity 3 between the liner 2 and the existing pipe 1, and gradually inject the grouting material from one end of the liner 2 into the multiple through holes 211 at the other end, so that the grouting material fills the filling cavity 3. After the grouting material in the filling cavity 3 solidifies, it can cooperate with the liner 2 to repair the existing pipe 1.

[0031] Embodiment 2: This embodiment discloses a construction method of a modular pipeline repair lining structure, referring to Figure 2-7 , including inserting the liner 2 into the existing pipeline 1, filling the medium into the interior of the liner 2, adjusting the center position of the liner 2 and injecting grouting material into the filling cavity 3 between the liner 2 and the existing pipeline 1.

[0032] When inserting the lining 2 into the existing pipeline 1, first dig vertical working wells at intervals of 20-30 meters in the length direction of the existing pipeline 1, the depth of the working well reaches the position of the existing pipeline 1, and the existing pipeline 1 is cut off from the position of the working well. The lining 2 includes multiple pipe sections 21, each of which has an equal length. The length of the working well cutoff is at least greater than the length of one pipe section 21, and then the pipe section 21 is sent downward from the position of the working well to the existing pipeline 1, and the pipe section 21 is inserted into the working well. The pipe section 21 can be made of plastic in this embodiment. By connecting two adjacent pipe sections 21 by hot melting, multiple pipe sections 21 are connected in sequence to form the lining 2. When the sum of the lengths of all the pipe sections 21 laid between the two working wells is greater than the distance between the two working wells, both ends of the lining 2 are exposed from the positions of the two adjacent working wells.

[0033] Before the pipe section 21 is inserted into the existing pipeline 1, a stirrup 23 is installed on the outside of the pipe section 21. The stirrup 23 is a ring with ends staggered. The diameter of the stirrup 23 can be enlarged by pulling it outward. The stirrup 23 can be placed between the outer wall of the pipe section 21 and the stirrup 23 using a cement pad, so that a gap of 1-2 cm is maintained between the stirrup 23 and the pad. The stirrup 23 is used to improve the strength of the middle layer. The stirrup 23 enters the existing pipeline 1 at the same time as the pipe section 21, and the diameter of the stirrup 23 is smaller than the diameter of the existing pipeline 1.

[0034] A support device 4 may also be provided in the middle or at both ends of the pipe section 21. The support device 4 includes a support frame 41 and a plurality of rollers 42. The support frame 41 is arranged in an arc shape and is arranged along the arc-shaped side wall of the pipe section 21. The support frame 41 may be fixedly connected to the outer wall of the pipe section 21 by bonding or hot melting. The middle part of the support frame 41 is arranged directly below the pipe section 21. Both ends of the support frame 41 are used to install rollers 42. The rollers 42 are rotatably connected to the support frame 41. The rolling direction of the rollers 42 is parallel to the length direction of the pipe section 21, so that the support device 4 supports the pipe section 21 and moves the pipe section 21 along the inner wall of the existing pipeline, thereby reducing the damage to the outer surface caused by the friction between the pipe section 21 and the inner wall of the existing pipeline 1.

[0035] Fill the inner part of the lining 2 with medium. The pressure pipes at both ends of the lining 2 can be connected to a water pump to fill water into the inner part of the lining 2. They can also be connected to an air pump to fill gas into the inner part of the lining 2. Therefore, air or water can be filled into the lining 2 as needed to make the inner part of the lining 2 have a pressurized medium. The medium in the lining 2 needs to maintain a certain pressure. Different pressures are selected according to the diameter of the lining 2. The larger the diameter of the lining 2, the greater the pressure value required. By filling the lining 2 with a pressurized medium, the lining 2 has an anti-deformation force, thereby being able to resist the gravity of the grouting material above.

[0036] A plurality of external support devices 5 are also provided on the outer wall of the liner 2. A through hole 211 is opened on the side wall of the liner 2. The positions of the external support devices 5 and the through hole 211 correspond. The medium enters into the external support devices 5 at the same time. Then the external support devices 5 are flexible bag-like structures. A plurality of external support devices 5 are arranged circumferentially along the outer wall of the liner 2, and a plurality of external support devices 5 are distributed at intervals along the length direction of the liner 2. The external support devices 5 are formed by a rubber sheet and a nylon rope is arranged inside the rubber sheet so that the external support devices 5 can be deformed and can withstand greater pressure. The overall bag-shaped opening of the external support device 5 faces the through hole 211, and the opening edges of the external support device 5 are fixed and sealed to the outer wall of the liner 2 by bonding.

[0037] Adjust the center position of the liner 2. When the medium is filled into the interior of the liner 2, the medium can enter the external support device 5 from the position of the through hole 211. After the external support device 5 is filled with the pressurized medium, the external support device 5 expands to a predetermined shape. The predetermined shape of the external support device 5 can be set as an arc as a whole and supported in the filling cavity 3 between the liner 2 and the existing pipeline 1. After the medium is filled into multiple external support devices 5, the periphery of the liner 2 is acted upon by the external support devices 5 so that the center line of the liner 2 can coincide with the center line of the existing pipeline 1, and then the grouting material filled in the filling cavity 3 can reach the bottom of the liner 2.

[0038] A connecting line 6 is also fixedly provided on the external support device 5, and the connecting line 6 can be fixedly connected to the nylon rope inside the external support device 5. The other end of the connecting line 6 is tied to the stirrup 23, and the connecting line 6 is arranged on both sides of the stirrup 23, so that the connecting line 6 pulls the stirrup 23 to fix the position of the stirrup 23. At the same time, when no cement pad is provided between the stirrup 23 and the lining 2, the connecting line 6 can increase the diameter of the stirrup 23 as the external support device 5 expands and reach a position where a gap is reserved between the lining 2, so that the stirrup 23 can enter the existing pipeline 1 along with the pipe section 21 to reduce the possibility of the cement pad falling off.

[0039] After adjusting the center position of the liner 2, a grouting pipe 71 and an exhaust pipe 72 are inserted into the filling cavity 3 between the existing pipeline 1 and the liner 2. The grouting pipe 71 and the exhaust pipe 72 are arranged along the length direction of the existing pipeline 1, and are restricted by the external support device 5. The grouting pipe 71 and the exhaust pipe 72 can be arranged at the upper position of the existing pipeline 1, so that the grouting pipe 71 can be used to inject grouting material into the filling cavity 3, and the gas in the filling cavity 3 can be discharged through the exhaust pipe 72. At the same time, the end position of the existing pipeline 1 is blocked, so that both ends of the filling cavity 3 between the existing pipeline 1 and the liner 2 are sealed to ensure that the filling cavity 3 can be filled with grouting material.

[0040] Inject grouting material into the filling cavity 3 between the lining 2 and the existing pipeline 1. First, connect the grouting equipment at one end of the grouting pipe 71, and then start to flow the grouting material into the filling cavity 3 through the grouting pipe 71. During the grouting process, the exhaust pipe 72 can continuously exhaust gas. When the grouting material flows into the exhaust pipe 72 during the injection of the grouting material into the filling cavity 3, stop, and then move the grouting pipe 71 and the exhaust pipe 72 along the length direction of the existing pipeline 1 so that the end of the grouting pipe 71 reaches the uninjected area again, and inject grouting material again. During the inflow process, a part of the grouting material is first discharged from the exhaust pipe 72, and then the gas is discharged. After the grouting material flows out again, stop grouting, and then move the grouting pipe 71 and the exhaust pipe 72 again until the filling cavity 3 is completely filled and the intermediate layer is formed after the grouting material solidifies.

[0041] The middle layer is subjected to secondary grouting. The transition pipes at both ends of the inner lining 2 are removed. Then, the inner lining 2 is entered. A hole is punched on the outer support device 5 from the position of the through hole 211. Then, the slurry head 8 connected to the grouting equipment is connected. The slurry head 8 is tubular. The slurry head 8 passes through the outer support device 5 and enters the position in contact with the middle layer. The slurry head 8 can peel the outer support device 5 from the middle layer. At the same time, due to the pressure of the secondary grouting between the outer support device 5 and the middle layer, the outer support device 5 is exposed from the position of the through hole 211. At the same time, the filling part can be filled by the secondary grouting. The secondary grouting can also further fill the interior of the middle layer, thereby reducing the incomplete filling of the filling cavity 3 between the inner lining 2 and the existing pipeline 1 caused by the solidification of the middle layer. After the secondary grouting is completed, the slurry head 8 is pulled out and the outer support device 5 exposed through the through hole 211 is tied and fixed.

[0042] The through hole 211 is sealed, and the portion of the external support device 5 exposed to the through hole 211 is cut from the inside of the lining 2, and then a mounting hole 9 is formed by drilling at the position of the through hole 211. An expansion bolt 91 is provided in the mounting hole 9, and the expansion bolt 91 is fixed in the mounting hole 9. A sealant 92 is filled between the expansion bolt 91 and the inner wall of the mounting hole 9 to seal the through hole 211.

[0043] The present embodiment also discloses a modular pipeline repair lining structure, which is constructed using the above-mentioned construction method of a modular pipeline repair lining structure, and includes an existing pipeline 1 and a lining 2. An intermediate layer is provided between the existing pipeline 1 and the lining 2, and the thickness of the intermediate layer around the lining 2 is kept consistent.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction method for a modular pipeline repair lining structure, characterized in that: The method comprises inserting an inner liner (2) into an existing pipeline (1) and injecting grouting material into a filling cavity (3) between the inner liner (2) and the existing pipeline (1), wherein a plurality of external support devices (5) are arranged on the outer wall of the inner liner (2), and a through hole (211) is opened on the outer wall of the inner liner (2); inserting the inner liner (2) into the existing pipeline (1) comprises first digging vertical working wells at intervals in the length direction of the existing pipeline (1), wherein the inner liner (2) comprises a plurality of pipe sections (21), cutting off the existing pipeline (1) in the working well, wherein the length of the cut is greater than the length of the pipe section (21), and the pipe section (21) is inserted into the existing pipeline (1) after being lowered from the working well and connected in sequence.

2. The construction method of a modular pipeline repair lining structure according to claim 1, characterized in that: The pipe segment (21) comprises a plurality of pipe segments (212), each pipe segment (21) may comprise three or four pipe segments (212), a connecting plate (213) and a rib plate (214) are fixedly arranged on the outer wall of each pipe segment (212), the connecting plate (213) is arranged at both ends of the pipe segment (212) in an arc shape, two adjacent connecting plates (213) are provided with connecting bolts, the rib plate (214) is arranged in an arc shape along the side wall of the pipe segment (212), a connecting screw rod (22) is arranged between two adjacent pipe segments (21), one end of the connecting screw rod (22) is fixedly connected to the rib plate (214) on one pipe segment (21), and the other end passes through the rib plate (214) on the adjacent pipe segment (21) and is threadedly connected to a nut.

3. The construction method of a modular pipeline repair lining structure according to claim 1 is characterized by: The external support device (5) comprises a threaded sleeve and a bolt, wherein the threaded sleeve is arranged along the radial direction of the pipe section (21), one end of the threaded sleeve is fixed to the outer wall of the pipe section (21), the bolt is threadedly connected to an end of the threaded sleeve away from the pipe section (21), and the end of the bolt located outside the threaded sleeve is used to abut against the inner wall of the existing pipeline (1).

4. The construction method of a modular pipeline repair lining structure according to claim 1, characterized in that: The method further comprises filling a medium into the interior of the inner liner (2), wherein the through hole (211) is located at a position on the inner liner (2) corresponding to the external support device (5), and the through hole (211) is connected to the interior of the external support device (5). During the process of filling the medium into the interior of the inner liner (2), the medium enters the external support device (5) through the through hole (211), and the external support device (5) is expanded under force so that the center line of the inner liner (2) coincides with the center line of the existing pipeline (1); when the grouting material flows into the filling cavity (3) between the inner liner (2) and the existing pipeline (1), the pressure in the inner liner (2) is maintained.

5. The construction method of a modular pipeline repair lining structure according to claim 4 is characterized by: Stirrups (23) are arranged on the outer side of the inner liner (2). The stirrups (23) are first wound around the outer side of the inner liner (2) before the inner liner (2) penetrates the existing pipe (1). The stirrups (23) are annular and the ends are staggered. After the diameter of the stirrups (23) is adjusted, a gap of 1-2 cm is maintained between the stirrups (23) and the outer wall of the inner liner (2). A connecting wire (6) is fixedly arranged on the outer support device (5). One end of the connecting wire (6) is fixed to a position of the outer support device (5) away from the inner liner (2), and the other end is fixed to the stirrups (23). As the outer support device (5) expands, the connecting wire (6) drives the stirrups (23) to open to adjust the diameter of the stirrups (23).

6. The construction method of a modular pipeline repair lining structure according to claim 4 is characterized by: After the medium is filled into the interior of the inner lining (2), a grouting pipe (71) and an exhaust pipe (72) are inserted from the end of the filling cavity (3), and both ends of the filling cavity (3) are blocked. The grouting pipe (71) and the exhaust pipe (72) are both located at the upper part of the inner filling cavity (3). Grouting material is injected into the filling cavity (3) through the grouting pipe (71), and gas in the filling cavity (3) is discharged through the exhaust pipe (72).

7. The construction method of a modular pipeline repair lining structure according to claim 6, characterized in that: In the process of injecting grouting material into the filling cavity (3) between the inner lining (2) and the existing pipeline (1), a grouting device is first connected to one end of the grouting pipe (71), and then grouting material is introduced into the grouting pipe (71), so that air is discharged from the exhaust pipe (72). When the exhaust pipe (72) discharges the grouting material, the operation stops. Then, the grouting pipe (71) and the exhaust pipe (72) are pulled along the length direction of the existing pipeline (1), and grouting material is injected into the grouting pipe (71) again. After the exhaust pipe (72) discharges the grouting material, air is discharged. When the grouting material is discharged again, the operation stops. The filling cavity (3) is filled with grouting material multiple times in sequence, and the grouting material forms an intermediate layer after solidification.

8. The construction method of a modular pipeline repair lining structure according to claim 7, characterized in that: The method also includes performing secondary grouting on the middle layer, including drilling a hole in the outer support device (5) from the position of the through hole (211), and then inserting a grouting head (8) connected to the grouting equipment between the outer support device (5) and the middle layer, so that the outer support device (5) is peeled off from the middle layer and fills the gap between the middle layer and the inner lining (2) and the existing pipeline (1).

9. The construction method of a modular pipeline repair lining structure according to claim 8, characterized in that: After the middle layer is subjected to secondary grouting and solidification, a filling portion is formed, and then a hole is drilled at the position of the through hole (211) and penetrated into the filling portion to form a mounting hole (9). An expansion bolt (91) is arranged in the mounting hole (9), the expansion bolt (91) is fixed in the mounting hole (9), and the expansion bolt (91) and the inner wall of the mounting hole (9) are filled with sealing glue (92).

10. A modular pipeline repair lining structure, characterized in that: A modular pipeline repair lining structure is constructed by using the construction method of any one of claims 1 to 9, comprising an existing pipeline (1) and a lining (2), wherein the lining (2) is located inside the existing pipeline (1), and an intermediate layer is provided between the lining (2) and the existing pipeline (1).

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