Construction method for connecting large-diameter pipeline into high-water-head-difference super-thick current well

Abstract

The invention relates to a construction method for connecting a large-diameter pipeline into a high-water-head-difference super-thick current situation well. The construction method comprises the following specific steps that firstly, the pipeline is cut; secondly, pipe joints are hoisted and removed; step 3, plugging an original pipeline section; step 4, plugging an original pipeline inspection well; 5, the current situation inspection well is chiseled away; and 6, connecting a new pipe: installing the new pipe at the chiseled inspection well. According to the large-diameter pipeline connected into the high-water-head-difference super-thick current situation well and the construction method, the construction quality and the construction efficiency of pipeline relocation can be effectively improved, safety is good, and good application and popularization value is achieved.

Description

Technical Field

[0001] The invention relates to a construction method for connecting a large-diameter pipeline to an existing high-head-difference ultra-thick well, and is mainly applicable to the relocation construction of an existing sewage pipeline. Background Art

[0002] With the acceleration of urbanization and the continuous growth of population, the construction and maintenance of urban infrastructure, especially underground sewage pipe systems, are particularly important. As the core component of the urban drainage system, the healthy operation of sewage pipes is directly related to the sanitation of the urban environment and the quality of life of residents. However, due to the increase in service life, changes in geological conditions and differences in construction quality, the underground sewage pipe systems in many cities are facing problems such as aging, damage and reduced carrying capacity, and are in urgent need of inspection and renewal.

[0003] Sewage pipes are characterized by great depth and large number, and their relocation is usually affected by factors such as depth, diameter and construction period. Pipes with shallow burial and long construction period are easier to relocate, while sewage pipes with short construction period and large burial depth are complicated to relocate and difficult to construct. There are relatively few actual engineering cases of relevant solutions under special conditions such as completing the relocation of sewage pipes in a short time and ensuring uninterrupted water supply.

[0004] Based on the complex construction conditions and high requirements for construction quality of engineering projects, an innovative construction method for accessing large-diameter pipelines to high-head-difference and ultra-thick existing wells with high construction efficiency, excellent construction quality and low safety risks is of great significance for improving the construction quality of pipeline relocation. Summary of the invention

[0005] The purpose of the present invention is to improve the construction quality of pipeline relocation and has better technical and economic benefits.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solution: a construction method for connecting a large-diameter pipeline to an existing well with a high head difference and an ultra-thickness, comprising the following specific steps: Step 1: Pipeline cutting: excavate the soil layer to expose the pipeline, then install the cutting frame, adjust the shelf plate in the slide slot so that the shelf plate is placed on the top surface of the soil layer, fix the shelf plate on the top surface of the soil layer with soil nails, and fix the bottom of the cutting frame with soil nails; select a replaceable arc drag that matches the curvature of the pipeline, install the replaceable arc drag on both sides of the cutting frame with fixing bolts, and tighten the fixing bolts, install the clamp arc plate on the replaceable arc drag and make the clamp arc plate close to the pipeline, then install the cutting assembly on the cutting frame, and cut the abandoned pipeline with the cutting assembly; Step 2: Lifting and removing the pipe section: After the cutting is completed, remove the cutting frame, set support blocks at the bottom of both ends of the exhaust pipe, use the support blocks to lift both ends of the waste pipe, and then install the lifting assembly; lift the cut waste pipe by the lifting assembly; Step 3: Sealing the original pipeline section: a brick wall is set up at the end of the original pipeline section to seal the end; first, a brick support is installed, the bottom of the brick support is fixed by soil nails, and then a central column is installed between the L-shaped steel plates on both sides of the brick support, and a limit truss is installed between the central column and the brick support, and then a concrete leveling part is constructed at the bottom of the brick support, and brickwork is constructed on the concrete leveling part to obtain a brick wall; when laying bricks, the bricks are close to the brick support; Step 4: Block the inspection well of the original pipeline: First, block the end of the original pipeline section near the inspection well with bricks, and then block the connection between the inspection well and the original pipeline section with concrete and steel plate sealing plates; Step 5: Existing inspection well chiseling: Install reinforced steel on the ground, then install the hanger and steel pipe beam, the hanger is connected to the limit slide on the reinforced steel, and the steel pipe beam is installed on the hanger; then install the anti-slag construction platform and reinforced steel plate, and the reinforced steel plate is installed at the chiseling position of the inspection well; then install the lifter and lifting slag cylinder, and finally carry out the chiseling operation at the chiseling position on the inspection well; Step 6. Connect the new pipe: Install the new pipe in the excavated inspection well.

[0007] Preferably, in step one, when installing the cutting assembly, first install a limit plate on the top of the cutting frame, and insert the two ends of the supporting base plate between the limit plates; then install a machine slot on the supporting base plate, install a cutter in the machine slot, install a rope saw on the cutter, put the rope saw on the position on the pipe that needs to be cut, and cut the discarded pipe through the cutter.

[0008] Preferably, in step 2, when installing the lifting assembly, first arrange the base at the bottom of both sides of the abandoned pipe. After the base is in place, connect the bases on both sides through tension screws, adjust the distance between the bases on both sides through the tension screws, and limit the exhaust pipe through the integrated arc drag on the base; install a reinforcing truss on the base, install the end cap on the reinforcing truss, and install a connecting rod between the two end caps; connect the lifting rope to the external lifting ear on the base, and finally lift the cut abandoned pipe.

[0009] Preferably, in step 2, the support block is wedge-shaped, and one side of the support block is struck so that the support block is wedged under the end of the waste pipe, thereby raising the end of the waste pipe to a certain height.

[0010] Preferably, when installing the limiting truss, both ends of the limiting truss are respectively inserted into the grooves on the central column and the brick support.

[0011] Preferably, in step four, when sealing the connection between the inspection well and the original pipeline section, first install a steel plate sealing plate with a steel column, fix the steel plate sealing plate with soil nails, install tensioning rods on both sides of the steel column, and finally pour concrete in the gap between the pipeline and the steel plate sealing plate.

[0012] Preferably, in step five, a limiting slide groove is provided on the flange of the reinforced steel, the hanger is connected to the limiting slide groove on the reinforced steel, and the steel pipe crossbeam is installed on the hanger.

[0013] The present invention has the following characteristics and beneficial effects: 1. The present invention adopts the abandoned pipe rope saw cutting technology and innovates the cutting device, thereby improving the construction efficiency of the abandoned pipe cutting and improving the construction safety.

[0014] 2. The present invention optimizes the technology of lifting out the cut pipe segment, innovates the fixed pipe segment lifting, improves the stability of lifting the pipe segment after cutting, and thus improves the construction safety of pipeline relocation.

[0015] 3. The present invention adopts the brick auxiliary support rapid plugging technology, which improves the construction efficiency of pipeline plugging and thus shortens the entire relocation construction period.

[0016] 4. The invention adopts a lifting slag-dropping cylinder and an anti-slag-dropping construction platform when the present situation inspection shaft wall is chiseled out, which reduces the risk of concrete slag falling during the construction process, thereby improving the safety of the entire construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the cutting frame; Figure 2 This is a schematic diagram of pipeline lifting and removal; Figure 3 It is a schematic diagram of the hanging frame assembly; Figure 4 This is a schematic diagram of brickwork plugging of pipelines; Figure 5 It is a schematic diagram of a brick support; Figure 6 This is a schematic diagram of the inspection well construction; Figure 7 It is a three-dimensional schematic diagram of the hanger; Figure 8 It is a schematic diagram of the steel plate sealing plate structure; Among them: 1. Pipe; 2. Soil layer; 3. Shelf plate; 4. Cutting assembly; 5. Lifting ring; 6. Limiting plate; 7. Cutting frame; 8. Slide; 9. Soil nail; 10. Hoop arc plate; 11. Replaceable arc drag; 12. Rope saw; 13. Machine slot; 14. Cutter; 15. Inner diagonal brace; 16. Side diagonal brace; 17. Fixing bolt; 18. Bottom limiting plate; 19. Support block; 20. Lifting assembly; 21. Lifting rope; 22. Connecting rod; 23. Strengthening truss; 24. Integrated arc drag; 25. External lifting ear; 26. Tension screw ; 27. Base; 28. Fixed flange; 29. ​​Adaptive connecting rod; 30. End cap; 31. Concrete leveling part; 32. Brick support; 33. Brick wall; 34. Center column; 35. Limit truss; 36. Notch; 37. Inspection well; 38. Limit slide; 39. Reinforced steel; 40. Hanger; 41. Ground; 42. Reinforced steel plate; 43. Anti-slag construction platform; 44. Lifting slag cylinder; 45. Lifter; 46. Tensioning strut; 47. Reinforcement rod; 48. Steel plate sealing plate; 49. Steel column. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0019] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0020] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0021] like Figures 1 to 8 As shown, a large-diameter pipeline is connected to an existing high-head-difference ultra-thick well and a construction method, including a pipeline 1, a soil layer 2, a cutting assembly 4, a cutting frame 7, a rope saw 12, a hoisting assembly 20, a reinforced truss 23, a brick support 32, an anti-slag construction platform 43, etc.

[0022] A pipe 1 is arranged in the soil layer 2, a cutting frame 7 is arranged outside the pipe 1, soil nails 9 are arranged at the bottom of the cutting frame 7 and fixed on the soil layer 2, slide grooves 8 are arranged on both sides of the cutting frame 7, a shelf plate 3 is arranged in the slide groove 8 and fixed on the top surface of the soil layer 2, a replaceable arc plate 11 is fixed by bolts at the middle position of the cutting frame 7, a hoop arc plate 10 is arranged on one side of the replaceable arc plate 11, the replaceable arc plate 11 is connected to the hoop arc plate 10 by fixing bolts 17, and a bottom limit is arranged at the bottom of the replaceable arc plate 11 Plate 18, a lifting ring 5 is arranged on the top of the cutting frame 7, a side diagonal brace 16 is arranged at the corner, and a cutting assembly 4 is arranged on the cutting frame 7; limit plate groups are arranged on both sides of the upper end of the cutting frame 7, and each limit plate group includes two limit plates 6 arranged oppositely; the cutting assembly 4 includes a bearing bottom plate, and the two ends of the bearing bottom plate are inserted between the limit plates 6; a machine groove 13 is arranged on the bearing bottom plate, a cutter 14 is arranged in the machine groove 13, inner diagonal braces 15 are arranged on both sides of the bearing bottom plate, and a rope saw 12 is arranged on the cutter 14.

[0023] The pipe 1 is cut by the cutting frame 4 and the cutting assembly 4. The cut pipe is a discarded pipe. A support block 19 is set below the end of the discarded pipe. The support block 19 is wedge-shaped. By knocking one side of the support block, the support block is wedged below the end of the discarded pipe, so that the end of the discarded pipe is lifted to a certain height, and then a lifting assembly 20 is set on the pipe side. The lifting assembly 20 includes a base 27, a fixed flange 28, an external lifting ear 25, an integral arc drag 24, a tension screw 26, a reinforcement truss 23, and a lifting rope 21. The base 27 is set on both sides of the lifting assembly 20. The base 27 on each side includes two base units. The base unit is provided with a fixed flange 28. An adaptive connecting rod 29 is set between the fixed flanges 28 of the two base units. The two ends of the adaptive connecting rod 29 are bolted to the fixed flange 28. The connecting rod 29 can be replaced according to the length of the discarded pipe. The bases 27 on both sides are connected by a tension screw 26. The base unit is provided with a reinforcing truss 23, and the ends of the reinforcing truss 23 are provided with end caps 30. A connecting rod 22 is provided between the end caps 30 on both sides, and a lifting rope 21 is provided in the lifting ear for lifting. The base unit is provided with an integral arc drag 24 and an external lifting ear 25, and the external lifting ear 25 is connected to the lifting rope 21.

[0024] The cut abandoned pipe is lifted away by the lifting assembly 20, and the remaining part of the pipe is the original pipe section. Brickwork is performed at the end of the original pipe section to form a brick wall 33 at the end of the original pipe section. A brick support 32 is arranged outside the brick wall 33, a concrete leveling part 31 is arranged at the bottom of the original pipe section, and the brick wall is arranged on the concrete leveling part 31. Soil nails 9 are arranged at the bottom of the brick support 32 for fixing. Both sides of the brick support 32 are L-shaped steel plates, and a central column 34 is arranged in the middle. Notches 36 are arranged on the central column 34 and the brick support 32, and a limit truss 35 is arranged in the notch 36, and the limit truss 35 is connected to the L-shaped steel plate.

[0025] The concrete leveling portion 31 is a concrete casting part, and the upper end surface of the concrete leveling portion 31 is a horizontal surface.

[0026] A reinforcing steel 39 is arranged on the ground 41 of the inspection well 37, a limiting slide 38 is arranged on the flange of the reinforcing steel 39, a hanger 40 is arranged in the limiting slide 38, a steel pipe crossbeam is arranged on the hanger 40, a steel wire rope is arranged on the steel pipe crossbeam, a slag-proof construction platform 43 is connected to the steel pipe crossbeam below the steel wire rope, and the slag-proof construction platform 43 is connected to the steel pipe crossbeam through the steel wire rope; a lifter 45 is arranged on the steel pipe crossbeam, a lifting and dropping slag cylinder 44 is connected to the lifting and dropping slag cylinder 44 through the lifter. A reinforcing steel plate 42 is arranged on the chiseling of the inspection well 37.

[0027] A plug is set at the end of the inspection well 37 of the original pipeline section, and a steel plate sealing plate 48 is set at the port of the original pipeline section. Soil nails 9 are set around the steel plate sealing plate 48 to fix the steel plate sealing plate 48. A steel column 49 is set at the bottom of the steel plate sealing plate 48, tensioning struts are set on both sides of the steel column 49, and reinforcement rods 47 are set between the steel columns 49.

[0028] The construction method of connecting a large-diameter pipeline to an existing well with a high head difference and super-thickness includes the following specific steps: Step 1, pipeline cutting: after excavating the soil layer 2, the pipeline 1 is leaked out, and then the cutting frame 7 is installed, the shelf plate 3 in the slide groove 8 is adjusted so that the shelf plate 3 is placed on the top surface of the soil layer, and the shelf plate is fixed to the top surface of the soil layer by soil nails 9, and the bottom of the cutting frame 7 is also fixed with soil nails 9; select a replaceable arc drag 11 that matches the curvature of the pipeline, install the replaceable arc drag 11 on both sides of the cutting frame 7 by fixing bolts 17, and tighten the fixing bolts 17, install the clamp arc plate 10 on the replaceable arc drag 11 and make the clamp arc plate 10 close to the pipeline 1, and then install the cutting assembly 4 on the cutting frame 7, and cut the abandoned pipeline by the cutting assembly 4.

[0029] When installing the cutting assembly, first install the limit plate on the top of the cutting frame, and insert the two ends of the bearing bottom plate into the limit plates; then install the machine slot 13 on the bearing bottom plate, install the cutter 14 in the machine slot 13, install the rope saw 12 on the cutter 14, and put the rope saw 12 on the position where the pipe needs to be cut, and cut the waste pipe through the cutter 14; Step 2, lifting and removing the pipe section: after the cutting is completed, the cutting frame is removed, and support blocks 19 are set at the bottom of both ends of the waste pipe 1, and the two ends of the waste pipe are lifted by the support blocks 19, and then the lifting assembly 20 is installed; when installing the lifting assembly 20, the base 27 is first arranged at the bottom of both sides of the waste pipe. After the base 27 is in place, the bases 27 on both sides are connected by the tension screws 26, and the distance between the bases 27 on both sides is adjusted by the tension screws 26. The waste pipe 1 is limited by the integrated arc drag 24 on the base 27; the reinforcing truss 23 is installed on the base 27, the end cap 30 is installed on the reinforcing truss 23, and the connecting rod 22 is installed between the two end caps 30; the lifting rope 21 is connected to the outer lifting ear 25 on the base 27, and finally the cut waste pipe is lifted and removed.

[0030] Step 3, sealing the original pipeline section: a brick wall is set at the end of the original pipeline section for sealing; first, a brick support 32 is installed, and the bottom of the brick support 32 is fixed by soil nails 9, and then a center column 34 is installed between the L-shaped steel plates on both sides of the brick support 32. After adjusting the verticality of the center column 34, a limiting truss 35 is installed between the center column 34 and the brick support 32, and the two ends of the limiting truss 35 are respectively inserted into the grooves on the center column 34 and the brick support 32; then, a concrete leveling part 31 is constructed at the bottom of the brick support 32, and brickwork is carried out on the concrete leveling part 31 to obtain a brick wall 33; when laying bricks, the bricks are close to the brick support 32.

[0031] Step 4. Seal the original pipeline inspection well: First, brick the end of the original pipeline section close to the inspection well 37 with bricks, and then seal the connection between the inspection well 37 and the original pipeline section with concrete and steel plate sealing plate 48; first install the steel plate sealing plate 48 with steel column 49, fix the steel plate sealing plate 48 with soil nails 9, and install tensioning struts 47 on both sides of the steel column 49, and finally pour concrete in the gap between the pipeline 1 and the steel plate sealing plate 48.

[0032] Step 5, current inspection well chiseling: Install the reinforced steel 38 with the limit slide 38 on the ground 41, then install the hanger 40 and the steel pipe crossbeam, the hanger 40 is connected to the limit slide 38 on the reinforced steel 38, and the steel pipe crossbeam is installed on the hanger 40; then install the anti-slag construction platform 43 and the reinforced steel plate 42, and the reinforced steel plate 42 is installed at the chiseling position of the inspection well 37; then install the lifter and the lifting and dropping cylinder, and finally carry out the chiseling operation at the chiseling position on the inspection well 37; During the chiseling, the operator stands on the anti-slag construction platform 42 to perform the chiseling construction, and the chiseled slag can be transported to the ground through the lifting slag cylinder.

[0033] Step 6. Connect the new pipe: Install the new pipe in the excavated inspection well.

Claims

1. A construction method for connecting a large-diameter pipeline to a high-head-difference ultra-thick existing well, characterized in that: The specific steps include: Step 1, pipe cutting: excavate the soil layer (2) to expose the pipe (1), then install the cutting frame (7), adjust the shelf plate (3) in the slide groove (8) so that the shelf plate (3) is placed on the top surface of the soil layer, fix the shelf plate on the top surface of the soil layer by soil nails (9), and fix the bottom of the cutting frame (7) by soil nails (9); select a replaceable arc drag (11) matching the curvature of the pipe, install the replaceable arc drag (11) on both sides of the cutting frame (7) by fixing bolts (17), and tighten the fixing bolts (17); install the clamp arc plate (10) on the replaceable arc drag (11) and make the clamp arc plate (10) close to the pipe (1), then install the cutting assembly (4) on the cutting frame (7), and cut the abandoned pipe by the cutting assembly (4); Step 2: Lifting and removing the pipe segment: after the cutting is completed, the cutting frame is removed, and support blocks (19) are arranged at the bottom of both ends of the waste gas pipe (1), and the two ends of the waste pipe are lifted up by the support blocks (19), and then a lifting assembly (20) is installed; the cut waste pipe is lifted and removed by the lifting assembly (20); Step 3, sealing the original pipeline section: a brick wall is set at the end of the original pipeline section to seal the end; first, a brick support (32) is installed, the bottom of the brick support (32) is fixed by soil nails (9), and then a central column (34) is installed between the L-shaped steel plates on both sides of the brick support (32), and a limit truss (35) is installed between the central column (34) and the brick support (32), and then a concrete leveling part (31) is constructed at the bottom of the brick support (32), and brickwork is constructed on the concrete leveling part (31) to obtain a brick wall (33); when laying bricks, the bricks are close to the brick support (32); Step 4: Blocking the inspection well of the original pipeline: First, brickwork is used to block the end of the original pipeline section close to the inspection well (37), and then concrete and steel plate sealing plates (48) are used to block the connection between the inspection well (37) and the original pipeline section; Step 5: Existing inspection well chiseling: Install the reinforced steel (38) on the ground (41), then install the hanger (40) and the steel pipe crossbeam, the hanger (40) is connected to the limit slide groove (38) on the reinforced steel (38), and the steel pipe crossbeam is installed on the hanger (40); then install the anti-slag construction platform (43) and the reinforced steel plate (42), and the reinforced steel plate (42) is installed at the chiseling position of the inspection well (37); then install the lifter and the lifting and dropping cylinder, and finally perform the chiseling operation at the chiseling position on the inspection well (37); Step 6. Connect the new pipe: Install the new pipe in the excavated inspection well.

2. The construction method for connecting a large-diameter pipeline to a high-head-difference ultra-thick existing well according to claim 1 is characterized in that: In step one, when installing the cutting assembly, firstly, a limit plate is installed on the top of the cutting frame, and the two ends of the supporting base plate are inserted between the limit plates; then, a machine slot (13) is installed on the supporting base plate, a cutter (14) is installed in the machine slot (13), a rope saw (12) is installed on the cutter (14), the rope saw (12) is placed on the position on the pipe to be cut, and the waste pipe is cut off by the cutter (14).

3. The construction method for connecting a large-diameter pipeline to a high-head-difference ultra-thick existing well according to claim 1 is characterized in that: In step 2, when installing the lifting assembly (20), first arrange the base (27) at the bottom of both sides of the waste pipe. After the base (27) is in place, connect the bases (27) on both sides by means of tension screws (26). Adjust the distance between the bases (27) on both sides by means of the tension screws (26). Limit the position of the waste pipe (1) by means of the integrated arc drag (24) on the base (27); install the reinforcing truss (23) on the base (27), install the end cap (30) on the reinforcing truss (23), and install the connecting rod (22) between the two end caps (30); connect the lifting rope (21) to the external lifting ear (25) on the base (27), and finally lift the cut waste pipe.

4. The construction method for connecting a large-diameter pipeline to a high-head-difference ultra-thick existing well according to claim 1 is characterized in that: In step 2, the support block (19) is wedge-shaped, and one side of the support block (19) is struck so that the support block (19) is wedged under the end of the waste pipe, thereby raising the end of the waste pipe to a certain height.

5. The construction method for connecting a large-diameter pipeline to a high-head-difference ultra-thick existing well according to claim 1 is characterized in that: When the limiting truss (35) is installed, the two ends of the limiting truss (35) are respectively inserted into the grooves on the middle column (34) and the brickwork support (32).

6. The construction method for connecting a large-diameter pipeline to a high-head-difference ultra-thick existing well according to claim 1 is characterized in that: In step 4, when sealing the connection between the inspection well (37) and the original pipeline section, first install the steel plate sealing plate (48) with the steel column (49), fix the steel plate sealing plate (48) by soil nails (9), and install tensioning rods (47) on both sides of the steel column (49), and finally pour concrete into the gap between the pipeline (1) and the steel plate sealing plate (48).

7. The construction method for connecting a large-diameter pipeline to a high-head-difference ultra-thick existing well according to claim 1 is characterized in that: In step five, a limit slide groove (38) is provided on the flange of the reinforced steel (39), the hanger (40) is connected to the limit slide groove (38) on the reinforced steel (39), and the steel pipe cross beam is installed on the hanger (40).

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