Construction method for large-diameter pipeline accessing ultra-thick existing well with high water head difference

Abstract

The present invention relates to a construction method for a large-diameter pipeline to access a super-thick existing well with a high water head difference, which includes the following specific steps: Step 1, pipeline cutting; Step 2, pipe section hoisting and removal; Step 3, plugging of the original pipeline section; Step 4, plugging at the original pipeline inspection well; Step 5, chiseling of the existing inspection well; Step 6, connecting a new pipe: installing a new pipe at the chiseled inspection well. The large-diameter pipeline accessing the super-thick existing well with a high water head difference and the construction method thereof according to the present invention can effectively improve the construction quality and construction efficiency of pipeline relocation, have good safety, and have good popularization and application value.

Description

Technical Field

[0001] The present invention relates to a construction method for large-diameter pipelines accessing ultra-thick existing wells with high water head differences, and is mainly applicable to the reconstruction construction of existing sewage pipelines. Background Technique

[0002] With the acceleration of the urbanization process and the continuous growth of the population, the construction and maintenance of urban infrastructure, especially the underground sewage pipeline system, become particularly important. As the core component of the urban drainage system, the healthy operation of sewage pipelines 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 pipeline systems in many cities are facing problems such as aging, damage, and reduced bearing capacity, and urgent repairs and updates are needed.

[0003] Sewage pipelines are characterized by large burial depths and large quantities. Their relocation and modification are usually affected by factors such as burial depth, diameter, and construction period. Pipelines with shallow burial and long construction periods are easier to relocate and modify. For sewage pipelines with short construction periods and large burial depths, their relocation and modification are complex and construction operations are difficult. Under special conditions such as completing the relocation and modification of sewage pipelines within a short time and ensuring uninterrupted water supply, there are relatively few actual engineering cases of relevant solutions.

[0004] Based on the requirements of complex construction conditions and high construction quality requirements for engineering projects, innovating a construction method for large-diameter pipelines accessing ultra-thick existing wells with high water head differences, which has high construction efficiency, excellent construction quality, and low safety risks, is of great significance for improving the construction quality of pipeline relocation and modification. Summary of the Invention

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

[0006] To achieve the above technical objectives, the present invention adopts the following technical solutions: A construction method for large-diameter pipelines accessing ultra-thick existing wells with high water head differences, including the following specific steps:

[0007] Step 1. Pipeline cutting: After excavating the soil layer to expose the pipeline, install a cutting frame, adjust the shelving plate in the chute so that the shelving plate is placed on the top surface of the soil layer, fix the shelving 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 matching the arc of the pipeline, install the replaceable arc drag on both sides of the cutting frame through fixing bolts, and tighten the fixing bolts. Install a hoop arc plate on the replaceable arc drag and make the hoop arc plate close to the pipeline. Then install a cutting component on the cutting frame, and cut off the waste pipeline through the cutting component;

[0008] Step 2. Pipe section hoisting and removal: After cutting is completed, remove the cutting frame, set support blocks at the bottoms of both ends of the exhaust gas pipeline, raise both ends of the discarded pipeline with the support blocks, and then install the hoisting assembly; hoist and remove the cut discarded pipeline through the hoisting assembly.

[0009] Step 3. Sealing of the original pipeline section: Set up a brick wall at the end of the original pipeline section for end sealing; first install a brick support, fix the bottom of the brick support with soil nails, then install a middle column between the L-shaped steel plates on both sides of the brick support, install a limit truss between the middle column and the brick support, then carry out the construction of the concrete leveling part at the bottom of the brick support, and carry out bricklaying construction on the concrete leveling part to obtain a brick wall; when laying bricks, the bricks are closely attached to the brick support.

[0010] Step 4. Sealing at the original pipeline inspection well: First carry out bricklaying and sealing at one end of the original pipeline section close to the inspection well, and then seal the through part between the inspection well and the original pipeline section with concrete and a steel plate sealing plate.

[0011] Step 5. Chiseling of the existing inspection well: Install a reinforced steel section on the ground, then install a hanging bracket and a steel pipe cross beam. The hanging bracket is connected to the limit sliding groove on the reinforced steel section, and the steel pipe cross beam is installed on the hanging bracket; then install an anti-falling slag construction platform and a reinforced steel plate, and the reinforced steel plate is installed at the chiseling position of the inspection well; then install a lifter and a lifting slag removal cylinder, and finally carry out chiseling operation at the chiseling position on the inspection well.

[0012] Step 6. Connecting the new pipe: Install the new pipe at the chiseled inspection well.

[0013] Preferably, in Step 1, when installing the cutting assembly, first install a limit plate on the top of the cutting frame, and snap both ends of the bearing bottom plate between the limit plates; then install a machine groove on the bearing bottom plate, install a cutter in the machine groove, install a wire saw on the cutter, put the wire saw around the position on the pipeline that needs to be cut, and cut off the discarded pipeline through the cutter.

[0014] Preferably, in Step 2, when installing the hoisting assembly, first arrange bases at the bottoms of both sides of the discarded pipeline. After the bases are in place, connect the bases on both sides with tie rods, adjust the distance between the bases on both sides through the tie rods, and limit the exhaust gas pipeline through the integral arc drag on the bases; install a strengthening truss on the bases, install end seals on the strengthening truss, and install a connecting rod between the two end seals; connect the lifting ropes to the outer lifting lugs on the bases, and finally hoist and remove the cut discarded pipeline.

[0015] Preferably, in Step 2, the support block is wedge-shaped. By knocking one side of the support block, the support block is wedged under the end of the discarded pipeline, so that the end of the discarded pipeline is lifted by a certain height.

[0016] Preferably, when installing the limit truss, both ends of the limit truss are respectively clamped into the slots on the middle vertical column and the brick support.

[0017] Preferably, in step four, when blocking the penetration between the inspection well and the original pipeline section, first install a steel plate sealing plate with a profiled steel column, fix the steel plate sealing plate through soil nails, install tension struts on both sides of the steel column, and finally pour concrete into the gap between the pipeline and the steel plate sealing plate.

[0018] Preferably, in step five, a limit chute is arranged on the flange of the reinforcing profiled steel, the hanger is connected with the limit chute on the reinforcing profiled steel, and the steel pipe cross beam is installed on the hanger.

[0019] The present invention has the following characteristics and beneficial effects:

[0020] 1. The present invention adopts the abandoned pipeline wire saw cutting technology and innovates the cutting device, improving the construction efficiency of cutting the abandoned pipeline and the construction safety at the same time.

[0021] 2. The present invention optimizes the technology for lifting out the cut pipe section and innovates the fixed pipe section lifting, improving the stability of lifting the cut pipe section and further enhancing the construction safety of pipeline relocation.

[0022] 3. The present invention adopts the technology of quickly blocking with a brick auxiliary support, improving the construction efficiency of pipeline blocking and shortening the construction period of the whole relocation.

[0023] 4. When chiseling the wall of the existing inspection well, the present invention adopts a lifting slag dropping cylinder and an anti-slag dropping construction platform, reducing the risk of concrete slag falling during the construction process and further improving the safety of the whole construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the cutting frame;

[0025] Figure 2 It is a schematic diagram of lifting out the pipeline;

[0026] Figure 3 It is a schematic diagram of the hoisting frame assembly;

[0027] Figure 4 It is a schematic diagram of brick blocking of the pipeline;

[0028] Figure 5 It is a schematic diagram of the brick support;

[0029] Figure 6 It is a schematic diagram of the inspection well construction;

[0030] Figure 7 It is a three-dimensional schematic diagram of the hanger;

[0031] Figure 8 It is a schematic diagram of the steel plate sealing plate structure;

[0032] Among them: 1. Pipeline; 2. Soil layer; 3. Laying plate; 4. Cutting assembly; 5. Suspension ring; 6. Limit plate; 7. Cutting frame; 8. Chute; 9. Soil nail; 10. Hoop arc plate; 11. Replaceable arc drag; 12. Wire saw; 13. Machine groove; 14. Cutter; 15. Inner diagonal brace; 16. Side diagonal brace; 17. Fixed bolt; 18. Bottom limit plate; 19. Support block; 20. Lifting assembly; 21. Lifting rope; 22. Connecting rod; 23. Reinforcing truss; 24. Integral arc drag; 25. Outer lifting lug; 26. Tie rod; 27. Base; 28. Fixed flange; 29. Adaptive connecting rod; 30. Sealing end; 31. Concrete leveling part; 32. Brick support; 33. Brick wall; 34. Middle column; 35. Limit truss; 36. Notch; 37. Inspection well; 38. Limit chute; 39. Reinforcing section steel; 40. Hanger; 41. Ground; 42. Reinforcing steel plate; 43. Anti-falling slag construction platform; 44. Lifting slag cylinder; 45. Lifter; 46. Tension strut; 47. Reinforcing rod; 48. Steel plate sealing plate; 49. Section steel column. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0034] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0035] It can 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 one element can be one, and in other embodiments, the number of this element can be multiple. The term "one" should not be construed as limiting the quantity.

[0036] Such as Figures 1 to 8As shown in the figure, a large-diameter pipeline is connected to a high-head-difference ultra-thick existing well and a construction method, including a pipeline 1, a soil layer 2, a cutting assembly 4, a cutting frame 7, a wire saw 12, a hoisting assembly 20, a strengthening truss 23, a brick bracket 32, a slag-proof construction platform 43, etc.

[0037] A pipeline 1 is arranged in the soil layer 2. A cutting frame 7 is arranged on the outer side of the pipeline 1. The bottom of the cutting frame 7 is provided with soil nails 9 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 grooves 8 and fixed on the top surface of the soil layer 2. A replaceable arc plate 11 is fixed in the middle position of the cutting frame 7 through bolts. A hoop arc plate 10 is arranged on one side of the replaceable arc plate 11. The replaceable arc plate 11 and the hoop arc plate 10 are connected through fixing bolts 17. A bottom limit plate 18 is arranged at the bottom of the replaceable arc plate 11. A lifting ring 5 is arranged at the top of the cutting frame 7. Side diagonal braces 16 are arranged at the corners. A cutting assembly 4 is arranged on the cutting frame 7; limit plate groups are arranged on both sides at the upper end of the cutting frame 7. Each limit plate group includes two oppositely arranged limit plates 6; the cutting assembly 4 includes a bearing bottom plate. The two ends of the bearing bottom plate are clamped 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. A wire saw 12 is arranged on the cutter 14.

[0038] The pipeline 1 is cut by the cutting frame 4 and the cutting assembly 4. The cut pipeline is a waste pipeline. A support block 19 is arranged below the end of the waste pipeline. The support block 19 is wedge-shaped. By knocking one side of the support block, the support block is wedged under the end of the waste pipeline, so that the end of the waste pipeline is lifted to a certain height. Subsequently, a hoisting assembly 20 is arranged on the side of the pipeline. The hoisting assembly 20 includes a base 27, a fixed flange 28, an outer lifting ear 25, an integral arc drag 24, a tie rod 26, a strengthening truss 23, and a lifting rope 21. The bases 27 are arranged on both sides of the hoisting assembly 20. Each side of the base 27 includes two base units. A fixed flange 28 is arranged on the base unit. An adaptive connecting rod 29 is arranged 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 matched and replaced according to the length of the waste pipeline. The two sides of the base 27 are connected by a tie rod 26. A strengthening truss 23 is arranged on the base unit. A sealing end 30 is arranged at the end of the strengthening truss 23. A connecting rod 22 is arranged between the two sealing ends 30 on both sides. A lifting rope 21 is arranged in the lifting ear for hoisting. An integral arc drag 24 and an outer lifting ear 25 are arranged on the base unit. The outer lifting ear 25 is connected to the lifting rope 21.

[0039] The cut-off waste pipeline is lifted away by the hoisting assembly 20, and the remaining part of the pipeline is the original pipeline section. Brickwork is carried out at the end of the original pipeline section to form a brick wall 33 at the end of the original pipeline section. A brick bracket 32 is arranged on the outer side of the brick wall 33, a concrete leveling part 31 is arranged at the bottom of the original pipeline section, and the brick wall is arranged on the concrete leveling part 31. The bottom of the brick bracket 32 is fixed by soil nails 9. The two sides of the brick bracket 32 are L-shaped steel plates, a middle column 34 is arranged in the middle, notches 36 are arranged on both the middle column 34 and the brick bracket 32, a limit truss 35 is arranged in the notch 36, and the limit truss 35 is connected to the L-shaped steel plate.

[0040] Among them, the concrete leveling part 31 is a concrete casting, and the upper end surface of the concrete leveling part 31 is a horizontal plane.

[0041] Reinforcing steel 39 is arranged on the ground 41 of the inspection well 37. A limit chute 38 is arranged on the flange of the reinforcing steel 39. A hanging bracket 40 is arranged in the limit chute 38. A steel pipe cross beam is arranged on the hanging bracket 40. A steel wire rope is arranged on the steel pipe cross beam. A slag-proof construction platform 43 is connected under the steel wire rope. The slag-proof construction platform 43 is connected to the steel pipe cross beam through the steel wire rope; A lifter 45 is arranged on the steel pipe cross beam. A lifting slag removal cylinder 44 is connected under the lifter 45. The lifting slag removal cylinder 44 is driven by the lifter to move up and down. Reinforcing steel plates 42 are arranged for the chiseling of the inspection well 37.

[0042] The original pipeline section is blocked at the inspection well 37 end. A steel plate sealing plate 48 is arranged at the port of the original pipeline section. Soil nails 9 are arranged around the steel plate sealing plate 48 to fix the steel plate sealing plate 48. A steel column 49 is arranged at the bottom of the steel plate sealing plate 48. Tension struts are arranged on both sides of the steel column 49, and a reinforcing rod 47 is arranged between the steel columns 49.

[0043] The construction method for a large-diameter pipeline accessing a super-thick existing well with a high water head difference includes the following specific steps:

[0044] Step 1, pipeline cutting: After excavating the soil layer 2 to expose the pipeline 1, then install the cutting frame 7. Adjust the placing plate 3 in the chute 8 so that the placing plate 3 is placed on the top surface of the soil layer. Fix the placing plate on the top surface of the soil layer through the soil nails 9. The bottom of the cutting frame 7 is also fixed with the soil nails 9; Select a replaceable arc drag 11 that matches the pipeline curvature. Install the replaceable arc drag 11 on both sides of the cutting frame 7 through the fixing bolts 17, and tighten the fixing bolts 17. Install the hoop arc plate 10 on the replaceable arc drag 11 and make the hoop arc plate 10 closely adhere to the pipeline 1. Then install the cutting assembly 4 on the cutting frame 7, and cut off the waste pipeline through the cutting assembly 4.

[0045] When installing the cutting assembly, first install the limit plate on the top of the cutting frame, and snap both ends of the bearing bottom plate between the limit plates; then install the machine groove 13 on the bearing bottom plate, install the cutter 14 in the machine groove 13, install the wire saw 12 on the cutter 14, put the wire saw 12 on the position of the pipeline to be cut, and cut off the waste pipeline through the cutter 14;

[0046] Step 2: Hoist and remove the pipe section: After cutting, remove the cutting frame, set support blocks 19 at the bottoms of both ends of the waste gas pipeline 1, raise both ends of the waste pipeline with the support blocks 19, and then install the hoisting assembly 20; when installing the hoisting assembly 20, first arrange the bases 27 at the bottoms on both sides of the waste pipeline, after the bases 27 are in place, connect the bases 27 on both sides through the tie rods 26, adjust the distance between the bases 27 on both sides through the tie rods 26, and limit the waste gas pipeline 1 through the integral arc drag 24 on the bases 27; install the strengthening truss 23 on the bases 27, install the end caps 30 on the strengthening truss 23, and install the connecting rod 22 between the two end caps 30; connect the lifting ropes 21 to the outer lifting lugs 25 on the bases 27, and finally hoist and remove the cut waste pipeline.

[0047] Step 3: Plug the original pipeline section: Set up a brick wall at the end of the original pipeline section for end capping; first install the bricklaying support 32, fix the bottom of the bricklaying support 32 through the soil nails 9, then install the middle column 34 between the L-shaped steel plates on both sides of the bricklaying support 32, after adjusting the verticality of the middle column 34, install the limit truss 35 between the middle column 34 and the bricklaying support 32, and snap both ends of the limit truss 35 into the slots on the middle column 34 and the bricklaying support 32 respectively; then construct the concrete leveling part 31 at the bottom of the bricklaying support 32, and carry out bricklaying construction on the concrete leveling part 31 to obtain the brick wall 33; when laying bricks, the bricks are closely attached to the bricklaying support 32.

[0048] Step 4: Plug the original pipeline inspection well: First carry out bricklaying plugging at one end of the original pipeline section close to the inspection well 37, and then plug the through part between the inspection well 37 and the original pipeline section with concrete and the steel plate seal 48; first install the steel plate seal 48 with the profiled steel column 49, fix the steel plate seal 48 through the soil nails 9, install the tension struts 47 on both sides of the steel column 49, and finally pour concrete into the gap between the pipeline 1 and the steel plate seal 48.

[0049] Step Five: Demolition of the existing inspection well: Install the reinforced steel 38 with a limit chute 38 on the ground 41, then install the hanging bracket 40 and the steel pipe cross beam. The hanging bracket 40 is connected to the limit chute 38 on the reinforced steel 38, and the steel pipe cross beam is installed on the hanging bracket 40. Then install the anti-falling slag construction platform 43 and the reinforced steel plate 42. The reinforced steel plate 42 is installed at the demolition position of the inspection well 37. Then install the lifter and the lifting slag dropping cylinder. Finally, carry out the demolition operation at the demolition position on the inspection well 37;

[0050] During the demolition, the operators stand on the anti-falling slag construction platform 42 to carry out the demolition construction, and the fallen slag can be transported to the ground through the lifting slag dropping cylinder.

[0051] Step Six: Connect the new pipe: Install the new pipe at the demolished inspection well.

Claims

1. Construction method for large-diameter pipeline accessing ultra-thick existing well with high water head difference, characterized in that It includes the following specific steps: Step 1, pipeline cutting: After excavating the soil layer (2) to expose the pipeline (1), then install the cutting frame (7), adjust the shelving plate (3) in the sliding groove (8) so that the shelving plate (3) is placed on the top surface of the soil layer, fix the shelving plate to the top surface of the soil layer through the soil nails (9), and fix the bottom of the cutting frame (7) with the soil nails (9); select a replaceable arc drag (11) that matches the pipeline curvature, install the replaceable arc drag (11) on both sides of the cutting frame (7) through the fixing bolts (17), and tighten the fixing bolts (17), install the hoop arc plate (10) on the replaceable arc drag (11) and make the hoop arc plate (10) close to the pipeline (1), then install the cutting assembly (4) on the cutting frame (7), and cut off the waste pipeline through the cutting assembly (4); when installing the cutting assembly, first install the limiting plate on the top of the cutting frame, and clamp the two ends of the bearing bottom plate between the limiting plates; then install the machine groove (13) on the bearing bottom plate, install the cutter (14) in the machine groove (13), install the wire saw (12) on the cutter (14), put the wire saw (12) on the position of the pipeline to be cut, and cut off the waste pipeline through the cutter (14); Step 2, pipe section hoisting and removing: After cutting, remove the cutting frame, set support blocks (19) at the bottoms of both ends of the waste gas pipeline (1), raise the two ends of the waste pipeline with the support blocks (19), and then install the hoisting assembly (20); hoist and remove the cut waste pipeline through the hoisting assembly (20); when installing the hoisting assembly (20), first arrange the bases (27) at the bottoms of both sides of the waste pipeline, after the bases (27) are in place, connect the bases (27) on both sides through the tie rods (26), adjust the distance between the bases (27) on both sides through the tie rods (26), and limit the waste gas pipeline (1) through the integral arc drag (24) on the bases (27); install the strengthening truss (23) on the bases (27), install the end caps (30) on the strengthening truss (23), and install the connecting rod (22) between the two end caps (30); connect the lifting ropes (21) with the outer lifting lugs (25) on the bases (27), and finally hoist and remove the cut waste pipeline; Step 3, sealing of the original pipeline section: Set up a brick wall at the end of the original pipeline section for end sealing; first install the bricklaying support (32), fix the bottom of the bricklaying support (32) through the soil nails (9), then install the middle column (34) between the L-shaped steel plates on both sides of the bricklaying support (32), install the limiting truss (35) between the middle column (34) and the bricklaying support (32), then construct the concrete leveling part (31) at the bottom of the bricklaying support (32), and carry out bricklaying construction on the concrete leveling part (31) to obtain the brick wall (33); when laying bricks, the bricks are close to the bricklaying support (32); Step 4. Plugging at the original pipeline inspection well: First, brick plugging is carried out at one end of the original pipeline section close to the inspection well (37), and then plugging is carried out at the penetration between the inspection well (37) and the original pipeline section through concrete and a steel plate seal (48); when plugging the penetration between the inspection well (37) and the original pipeline section, first install the steel plate seal (48) with a profiled steel column (49), fix the steel plate seal (48) through soil nails (9), install tension struts (47) on both sides of the steel column (49), and finally pour concrete into the gap between the pipeline (1) and the steel plate seal (48). Step 5. Chiseling the existing inspection well: Install profiled steel (39) on the ground (41), then install a hanging bracket (40) and a steel pipe cross beam. The hanging bracket (40) is connected to the limit sliding groove (38) on the profiled steel (39), and the steel pipe cross beam is installed on the hanging bracket (40); then install a slag-proof construction platform (43) and a reinforcing steel plate (42), and the reinforcing steel plate (42) is installed at the chiseling position of the inspection well (37); then install a lifter and a slag-dropping cylinder, and finally carry out chiseling operations at the chiseling position on the inspection well (37). Step 6. Connecting the new pipe: Install the new pipe at the chiseled inspection well.

2. The construction method of the large-diameter pipeline accessing the ultra-thick existing well with high water head difference according to claim 1, characterized in that, In Step 2, the support block (19) is wedge-shaped. By knocking on one side of the support block (19), the support block (19) is wedged under the end of the abandoned pipeline, raising the end of the abandoned pipeline by a certain height.

3. The construction method of the large-diameter pipeline accessing the ultra-thick existing well with high water head difference according to claim 1, characterized in that, When installing the limit truss (35), the two ends of the limit truss (35) are respectively clamped into the slots on the middle column (34) and the brick support (32).

4. The construction method of a large-diameter pipeline accessing an ultra-thick existing well with a high water head difference according to claim 1, characterized in that, In Step 5, a limit sliding groove (38) is provided on the flange of the profiled steel (39). The hanging bracket (40) is connected to the limit sliding groove (38) on the profiled steel (39), and the steel pipe cross beam is installed on the hanging bracket (40).

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