CN110747965B - Expansion-draw pipe construction process for reconstruction and expansion of drainage pipe network - Google Patents
Expansion-draw pipe construction process for reconstruction and expansion of drainage pipe network Download PDFInfo
- Publication number
- CN110747965B CN110747965B CN201911056126.XA CN201911056126A CN110747965B CN 110747965 B CN110747965 B CN 110747965B CN 201911056126 A CN201911056126 A CN 201911056126A CN 110747965 B CN110747965 B CN 110747965B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- pipe
- construction
- water
- well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
- E03F9/007—Devices providing a flushing surge
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
The invention discloses a construction process for reconstructing and expanding a drainage pipe network and expanding a pipe, which comprises the following specific steps of pre-inspection, applying for occupying a road, breaking a road and dismantling the road, measuring and lofting, enclosing, blocking, guiding, dredging and cleaning the pipeline, carrying out CCTV detection, pretreatment, road breaking, comprehensive pipe inspection and CCTV detection on the pipe section by a detector, carrying out construction by adopting a static pipe expanding method, drawing a cutter and a pipe expanding head by using a hydraulic oil cylinder to provide pulling force, connecting the pipe expanding head with a new pipeline, cutting the old pipeline by the cutter under the traction of a pull rod, extruding old pipeline fragments into the surrounding soil by the pipe expanding head, and laying the new pipeline; and (5) cleaning the site. The construction process for reconstructing and expanding the drainage pipe network by adopting the steps solves the problem of replacement of the plastic pipe which cannot be solved by other pipe expanding methods, is the only feasible non-excavation method for updating the small-diameter plastic pipeline, reduces the treatment pressure of a sewage plant and protects the water environment.
Description
Technical Field
The invention relates to the technical field of drainage pipe network reconstruction and expansion construction, in particular to a drainage pipe network reconstruction and expansion pipe-drawing construction process.
Background
In the present stage of China, social economy is rapidly developed, and the urbanization process is greatly promoted. The new-built residential area is built, and along with the building of the residential area, municipal supporting facilities, in particular drainage pipe networks closely related to the lives of residents are built. Correspondingly, the drainage pipe network of the old residential area which is far away from the construction age gradually exposes some reasons along with the time, and influences the normal life of residents in the residential area. Therefore, the old community in the jurisdiction is generally checked for the current condition of the drainage pipeline, the accident potential of the underground pipeline is mainly checked, and old pipelines and pipeline accident-prone sections in the jurisdiction are all the key points for checking.
Through investigation, the following reasons are found to exist inside the cell: the existing drainage pipe network is long in construction age, the structure is aged, the drainage capacity is insufficient, the siltation in different degrees exists in the pipeline along with the increase of the service life of the pipeline, the section of the drainage pipeline is small, the drainage capacity of the pipeline is insufficient, the drainage is not smooth, and the life and the environmental sanitation of residents are seriously influenced. Due to the aging and serious leakage of the pipeline, the sewage leakage causes pollution to underground water and certain negative influence on environmental protection. Meanwhile, the serious pollution to the river channel also increases the burden of the sewage treatment plant, so that the reason for solving the problem is urgent. The existing drainage system is mostly a rain and sewage combined system, the drainage system of old communities is mostly a rain and sewage combined system, and a large amount of rainwater flows into a sewage treatment plant through a sewage pipeline every rainy season, so that the treatment pressure of the sewage treatment plant is increased; on the other hand, part of sewage is directly discharged into the river channel through a rainwater pipeline, so that the water environment is polluted.
Disclosure of Invention
The invention aims to provide a construction process for reconstructing and expanding a drainage pipe network by expanding and pulling pipes, which solves the problem of replacement of plastic pipes which cannot be solved by other pipe expanding methods, is the only feasible non-excavation method for updating small-diameter plastic pipelines, reduces the treatment pressure of sewage plants and protects the water environment.
In order to achieve the aim, the invention provides a construction process for rebuilding and expanding a drainage pipe network by expanding a pipe, which comprises the following steps:
(1) pre-investigation: opening an inspection well for QV detection;
(2) applying for occupying road, breaking road and dismantling: according to a design drawing and a site survey result, reporting corresponding road-breaking occupation and structures to be dismantled to a supervision and construction unit, and drawing a road-breaking plane map of each pipe section;
(3) measuring lofting and enclosing: according to the approved broken road occupying plan, measuring and releasing edge lines of road surfaces needing to be broken of corresponding pipe sections, popping the edge lines by adopting an ink fountain, temporarily enclosing by adopting a water horse, and placing a bulletin board, a warning mark and a guide board;
(4) plugging: in the pipe section repairing construction, safe blocking is carried out on the pipeline, and an air bag blocking method or a wall body blocking method is adopted as a blocking method;
(5) flow guiding: before construction of a certain section of sewage pipeline, plugging the opening of an inspection well pipe at the starting end of the section, arranging a water pump and a water hose in an inspection well upstream of the inspection well, guiding water to another section of sewage pipeline, raising the water level in the pipeline after plugging of the pipeline, arranging a specially-assigned person to take care of water guiding equipment, and synchronously adding the water guiding equipment when the water amount is increased;
(6) clearing and dredging: the method comprises the following steps that an injection nozzle is inserted into a pipeline for clearing blockage from downstream well construction, the pipeline penetrates or crosses the blockage, then the blockage material is cleared by the force of a spraying machine along with the pulling back of a hose, two construction standards of downstream working well construction or upstream maintenance well construction are set according to the working direction of an operator and the selection of a nozzle, and then the pipeline is cleaned;
(7) CCTV detection: after the pipeline is cleaned, the detection personnel carry out CCTV detection on the pipeline section;
(8) pretreatment, path breaking, comprehensive pipe verification and CCTV detection: cutting and removing foreign matters in the pipeline by using a milling cutter robot, cleaning the pipeline again by using a high-pressure cleaning vehicle after the milling cutter robot cuts defects, sucking sediments washed out by high pressure into a tank body by using a sewage suction vehicle, cutting the road surface along the edge line by using a cutting machine according to the edge line of the broken road for lofting measurement, breaking a road surface structure layer by using a breaking hammer, loading the broken road surface structure layer by using a muck excavator, transporting the loaded road surface structure layer to a specified waste soil site of a construction unit, and performing comprehensive pipeline verification on the inside of the excavated pipeline section after the road structure layer is excavated;
(9) rebuilding a new pipeline: the static pipe expanding method is adopted for construction, a tool and a pipe expanding head are pulled by a hydraulic oil cylinder to provide pulling force, the pipe expanding head is connected with a new pipeline, when the tool cuts the old pipeline under the traction of a pull rod, and meanwhile, the pipe expanding head extrudes fragments of the old pipeline to enter surrounding soil, and the new pipeline is laid;
(10) cleaning the site: after the repair is completed: and removing the used construction machines, waste materials, construction wastes and temporary facilities out of the construction site.
Preferably, the air bag blocking method in the step (4) is to block each lower rubber air bag at the upstream and downstream of the cleaning area section, cut off all water inlet sources, control the corresponding water level, block 1 air bag at the upper opening and the lower opening of the upstream and downstream well head of the pipe section to be cleaned at the lower bag position, and add stainless steel baffle walls at two sides of the construction pipe section to support the blocked air bags.
Preferably, the wall body plugging method in the step (4) is to plug a large pipeline by using building blocks, the wall body thickness of the plugged pipeline is set according to the maximum thrust, one or two short pipes for temporary drainage are usually embedded in advance during wall building, and the reserved pipes are sealed after the wall body reaches the use strength. And similarly, when the wall body is dismantled, the plug in the reserved pipe is firstly removed, the water level is reduced, and then the wall body is dismantled manually.
Preferably, the wall material for plugging is common bricks and building blocks.
Preferably, in the step (6), the construction of the downstream working well is specifically to place a hose and an injection nozzle into the downstream manhole, a nozzle of a reverse type sprayer is selected, the nozzle and the hose are inserted into the front face of the plugging part, the high-pressure pump is started, the nozzle is kept in a moving state all the time through a backward working mode of the nozzle, when the nozzle penetrates through the plug, the playback rate of 100 and 200mm/s is maintained, fragments generated in the injection operation process are periodically washed out of the sewage pipeline by pulling the hose and the head part towards the manipulator, and meanwhile, the water pressure is maintained.
Preferably, the construction of the upstream manhole in the step (6) is specifically that a nozzle with a backward and forward jet machine is selected, the nozzle and a hose are inserted into the front face of the plugging part, the high-pressure pump is started, the nozzle is kept in a moving state when the nozzle works, and the cleaning and dredging are carried out through a backward and forward working mode of the nozzle.
Preferably, the pipeline cleaning in the step (6) is performed by high-pressure cleaning, specifically, construction is performed from a downstream wellhead, a nozzle and a hose are placed into the pipeline, before a pump is started, a spray head is placed at the tail end of the pipeline, a reflection nozzle spray head is used for ensuring that the spray head is in a motion state, when the spray head is below the water surface, water flow in the pipeline needs to be controlled, the spray head is conveyed into the pipeline to be cleaned, then impurities in the pipeline are washed into a downstream working well in the pulling-back process, the impurities are removed, the backward speed is controlled at 200mm/s, in addition, when the pipeline is cleaned at high pressure, a sewage suction truck or a mud pump is used for pumping the mixture cleaned in the inspection well, and the cleaned sludge and garbage are loaded into a woven bag and conveyed to a designated place.
Preferably, in the CCTV detection operation in step (7), a water level reduction measure is taken to make the water level in the pipeline not greater than 20% of the diameter of the pipeline, the advancing direction of the crawler is consistent with the water flow direction, when the pipe diameter is not greater than 500mm, the advancing speed of direct vision photography is not greater than 0.15m/s, the moving track of the detection camera lens deviates from the pipe diameter by not greater than ± 10% of the pipe diameter on the axis of the pipeline, the crawler carrying the lens is placed at the detection starting position and then starts detection, after the detection of each pipe section is completed, the numerical value displayed by the counter is corrected according to the mark length on the cable, during the direct vision photography, the image should be kept in a forward horizontal direction, during the advancing process of the crawler, when the zoom function is used, the crawler should be kept in a stationary state, when the crawler continues to advance, the focal length of the lens is firstly restored to the shortest focal, the crawler is stopped at the location where the defect is resolved.
Preferably, the comprehensive pipeline verification method in the step (8) is to manually excavate 60cm wide grooves at corresponding positions of the comprehensive pipeline, the lengths of the grooves are that the intersection positions of the comprehensive pipeline and the excavated pipe section extend 1 meter along the direction of the excavated pipe section, and all the comprehensive pipelines marked in the design drawing are found.
Preferably, the concrete process of the static pipe expansion method construction in the step (9) is as follows:
A. pipeline replacement-related data replacement size
The diameter range of the sewage pipeline is 50mm to 1000mm, the replacement length is 10m to 250m, the pipe diameter increase size range is 20 percent to 50 percent, and the depth range is 1m to 5 m;
B. preparation before construction
Carrying out construction measurement and site paying-off work, determining the accurate positions of obstacles in a pipeline range and a site required by construction, building temporary facilities according to a construction plane layout drawing, installing temporary water and electric lines, testing water and electricity, processing and manufacturing pipe jacking equipment, preparing various pipelines and required auxiliary objects according to jacking length, and organizing materials into the site in batches in stages according to a material plan;
C. material preparation
Selecting high-density high-pressure polyethylene pipes made of PE (polyethylene) with the same pipe diameter, selecting standard pipes with detection reports and qualification certificates every 6 meters, ensuring that the pipe walls are uniform in thickness and size, then processing the raw materials of the PE pipes into short pipe connection units by using a precision lathe, wherein each section of 50 cm-long short pipe is provided with a spigot-and-socket letter lock catch, the spigot-and-socket lap joint length of each short pipe is 10 cm, the gap after tightening is 0.15 mm, the groove depth of a pipe head sealing ring is 2.7 mm, and the groove width is 2.8 mm;
D. preparation of construction site
Removing and transferring the obstacles, enclosing a construction area with water, laying a temporary construction pavement, transporting machinery, equipment and materials to the site, laying temporary water, and building a temporary facility;
E. upstream water source plugging port
The underground personnel enter the air bag into an upstream pipeline, the air pump is inflated to isolate a water source, a reamer sewage pump is installed, and water is pumped to a downstream municipal pipeline by a water hose;
F. pipeline dredging
Repeatedly flushing an original pipeline by using a cleaning vehicle, pulling sludge and sundries to a sewage well, conveying the sewage well into a ground dredging vehicle by using a bucket for a downhole worker, pumping the sludge in the sewage well by using a sanitation sewage suction vehicle, and observing the internal collapse condition of the pipeline by using a pipeline endoscope camera system and a CCTV video detector;
G. build push bench platform
The method comprises the following steps of (1) descending a well, building a hydraulic pipe jacking machine operating room, shaving a sewer at the bottom of a sewage well by using an air pick, installing a pipe jacking machine protection support, breaking grooves with the width of 7 cm and the depth of 15 cm on two sides of a drain chute of a well chamber at the bottom of the well chamber, installing a pressure-bearing steel plate, and then fixing a press base by using quick-setting cement;
H. penetrating rod and original crushing pipeline
Assembling a pipe drawing unit, pushing each ejector rod with the length of 50cm to a downstream well chamber by using a pipe pushing machine, enabling the ejector rods to penetrate out of the downstream well chamber, installing a crusher after the ejector rods are pushed to the downstream well chamber, keeping a crushing cutter vertical, and observing pressure change of a hydraulic pump in a pull-back process;
I. cleaning up fragments of pipeline and internal investigation
Pushing each ejector rod with the length of 50cm to a downstream well chamber by using a push bench, installing a desilting device, pulling back the push bench, pulling the cement pipeline fragments to a sewage well, transporting the fragments into a ground garbage truck by using a water bucket, and observing the inside of the pipeline for cleaning by using a pipeline endoscope camera system;
J. reaming and internal investigation
Pushing the ejector rod to a downstream well chamber by using a push bench, installing a reamer, pulling back the reamer, simultaneously performing slurry wall protection in the pulling back process, and observing the hole condition in the pipeline by using a pipeline endoscope camera system;
K. pipe jacking operation and fixed pipeline
Installing a sealing ring on a snap fastener of a processed 50 cm-long PE pipe, brushing a sealant, jacking the PE pipe into a hole by using a pipe jacking machine, jacking the PE pipe to a downstream well chamber to protrude 20 cm of the well wall, punching a hole with the width of 10 cm, the depth of 10 cm and the length of 20 cm at the bottom of a PE pipe orifice of the two well chambers by using a hammer, then inserting 3 round steel bars with the length of 20 cm into the hole by clinging to the pipe orifice, smearing quick setting cement, and trowelling and polishing;
l, repairing sewage well and removing water source plug
Building a water flowing groove by red bricks, leveling the water flowing groove by quick-setting cement according to the original gradient, restoring the water flowing groove to the original well chamber state, and taking out the plugging air bag by a person going into the well;
o, cleaning site and water passing acceptance check
The cleaning site is sanitary, the residue soil and the garbage are cleaned, and water is introduced and the inspection and acceptance are carried out.
Therefore, the construction process for rebuilding and expanding the drainage pipe network by adopting the steps solves the problem of replacing the plastic pipes which cannot be solved by other pipe expanding methods, is the only feasible non-excavation method for updating the small-diameter plastic pipelines, reduces the treatment pressure of a sewage plant and protects the water environment.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a flow chart of an embodiment of the construction process for rebuilding and expanding a drainage pipe network by expanding a pipe.
Detailed Description
Examples
Fig. 1 is a flow chart of an embodiment of the expanded stay tube construction process for rebuilding and expanding a drainage pipe network, and as shown in the figure, the invention provides a drainage pipe network rebuilding and expanding expanded stay tube construction process, which comprises the following steps:
(1) pre-investigation: ensuring that any extraneous personnel are not in close proximity to the manhole during the flushing operation, including the creation of obstacles near an unattended manhole, the removed manhole cover should be placed in the proper place without obstructing any staff and other personnel. The pipeline QV adopts a high-definition camera module with an automatic defogging function and is provided with a high-brightness LED lamp to provide a sufficient light source for a lens, and before cleaning, the structure condition and the deposition degree of each pipeline section are determined by means of a video recording technology.
(2) Applying for occupying road, breaking road and dismantling: and according to a design drawing and a site survey result, reporting corresponding road-breaking occupation and structures to be dismantled to a supervision and construction unit, and drawing a road-breaking plane map of each pipe section occupation.
(3) Measuring lofting and enclosing: according to the approved broken road occupying plan, measuring and releasing the edge lines of the corresponding pipe sections, which need to break the road surface, popping the edge lines by adopting an ink fountain, temporarily enclosing by adopting a water horse, and placing a bulletin board, a warning sign and a guide board.
(4) Plugging: in the pipe section repairing construction, safe blocking is carried out on the pipeline, and an air bag blocking method or a wall body blocking method is adopted as a blocking method;
the air bag plugging method specifically comprises the steps of plugging each lower rubber air bag at the upstream and the downstream of a cleaning area section, cutting off all water inlet sources, controlling corresponding water levels, reducing air bag pressure and improving operation safety, wherein attention is needed in an air bag plugging process, 1 air bag is required to be plugged at the upper opening and the lower opening of the upstream and the downstream well mouth of the pipe section to be cleaned at the lower bag position, and stainless steel baffle walls are additionally arranged at the two sides of the construction pipe section to support the plugged air bags. During plugging, a specially-assigned person is required to take care of the plugging, the water level conditions in the air bag pressure gauge and the pipeline are checked regularly, and whether the pressure relief condition exists or not and the pressure is supplemented timely is judged. The parameters and working range of the air bag are shown in table 1.
TABLE 1
The wall body plugging method specifically comprises the steps of plugging a large pipeline by building blocks, setting the wall body thickness of the plugged pipeline according to the maximum thrust, usually embedding one or two short pipes for temporary drainage in advance during wall building, and sealing the reserved pipes after the wall body reaches the use strength. And similarly, when the wall body is dismantled, the plug in the reserved pipe is firstly removed, the water level is reduced, and then the wall body is dismantled manually. The wall material of the plugging is common bricks and building blocks.
(5) Flow guiding: before carrying out certain section sewer line construction, with this section start end inspection well mouth shutoff, then set up water pump and hosepipe in this inspection well upstream inspection well, to another section sewer line water guide, after the pipeline shutoff finished, the water level rose in the pipeline, and the arrangement special messenger manages water guide equipment, and when the water yield increased, the synchronous water guide equipment that increases.
(6) Clearing and dredging: the method comprises the following steps that an injection nozzle is inserted into a pipeline for clearing blockage from downstream well construction, the pipeline penetrates or crosses the blockage, then the blockage material is cleared by the force of a spraying machine along with the pulling back of a hose, two construction standards of downstream working well construction or upstream maintenance well construction are set according to the working direction of an operator and the selection of a nozzle, and then the pipeline is cleaned;
the construction from the downstream working well specifically comprises the steps of putting a hose and an injection nozzle into the downstream manhole, selecting a nozzle of a reverse type spraying machine, inserting the nozzle and the hose into the front face of a plugging part, starting a high-pressure pump, keeping the nozzle in a moving state all the time through a backward working mode of the nozzle, and keeping a playback rate of 100 and 200mm/s when the nozzle passes through a blockage, so that fragments generated in the injection operation process are pulled towards a manipulator through the hose and a head part to be periodically washed out of a sewage pipeline, and meanwhile, water pressure is kept.
The construction from an upstream manhole specifically comprises the steps of selecting a nozzle with a backward and forward spraying machine, inserting the nozzle and a hose into the front of a plugging part, starting a high-pressure pump, keeping the nozzle in a moving state all the time when the nozzle works, and clearing through the backward and forward working mode of the nozzle.
The pipeline cleaning adopts high-pressure cleaning, specifically, construction is started from a downstream wellhead, a nozzle and a hose are placed in a pipeline, before a pump is started, a spray head is placed at the tail end of the pipeline, a reflection nozzle spray head is used for ensuring that the spray head is in a motion state, when the spray head is positioned below the water surface, water flow in the pipeline needs to be controlled, the spray head is conveyed into the pipeline to be cleaned, then sundries in the pipeline are washed into a downstream working well in the pulling-back process, the sundries are removed, the falling speed is controlled at 100 mm/s, in addition, when the pipeline is cleaned under high pressure, a dirt suction truck or a mud pump is used for pumping the cleaned mixture in an inspection well, and the cleaned sludge and garbage are placed into woven bags and conveyed to a designated place.
(7) CCTV detection: after the pipeline is cleaned, the detection personnel carry out CCTV detection on the pipeline section; during CCTV detection, water level lowering measures are taken to ensure that the height of the water level in the pipeline is not more than 20% of the diameter of the pipeline, the advancing direction of the crawler is consistent with the water flow direction, when the pipe diameter is not more than 500mm, the advancing speed of direct vision photography is not more than 0.15m/s, the moving track of a detection camera lens is on the axis of the pipeline and deviates not more than +/-10% of the pipe diameter, the crawler with the lens is placed at the detection starting position and then starts to detect, after the detection of each pipe section is completed, the display value of the counter is corrected according to the length of the mark on the cable, the image should be kept forward and horizontal in the direct-view shooting process, in the advancing process of the crawler, when the zoom function is used, the crawler is kept in a static state, when the crawler continues to advance, the focal length of the lens is restored to the shortest focal length position, and when defects are found in the detection process, the crawler is stopped at the position for analyzing the defects.
(8) Pretreatment, path breaking, comprehensive pipe verification and CCTV detection: cutting and removing foreign matters in the pipeline by using a milling cutter robot, cleaning the pipeline again by using a high-pressure cleaning vehicle after the milling cutter robot cuts defects, sucking sediments washed out by high pressure into a tank body by using a sewage suction vehicle, cutting the road surface along the edge line by using a cutting machine according to the edge line of the broken road for lofting measurement, breaking a road surface structure layer by using a breaking hammer, loading the broken road surface structure layer by using a muck excavator, transporting the loaded road surface structure layer to a specified waste soil site of a construction unit, and performing comprehensive pipeline verification on the inside of the excavated pipeline section after the road structure layer is excavated; the comprehensive pipeline checking method comprises the steps of manually excavating 60cm wide grooves at corresponding positions of the comprehensive pipeline, wherein the lengths of the grooves are that the intersection positions of the comprehensive pipeline and an excavated pipe section extend 1 meter along the direction of the excavated pipe section, and all the comprehensive pipelines marked in a design drawing are found.
(9) Rebuilding a new pipeline: the static pipe expanding method is adopted for construction, a tool and a pipe expanding head are pulled by a hydraulic oil cylinder to provide pulling force, the pipe expanding head is connected with a new pipeline, when the tool cuts the old pipeline under the traction of a pull rod, and meanwhile, the pipe expanding head extrudes fragments of the old pipeline to enter surrounding soil, and the new pipeline is laid;
the concrete process of static pipe expanding construction comprises the following steps:
A. pipeline replacement-related data replacement size
The diameter range of the sewage pipeline is 50mm to 1000mm, the replacement length is 10m to 250m, the pipe diameter increase size range is 20 percent to 50 percent, and the depth range is 1m to 5 m;
B. preparation before construction
Carrying out construction measurement and site paying-off work, determining the accurate positions of obstacles in a pipeline range and a site required by construction, building temporary facilities according to a construction plane layout drawing, installing temporary water and electric lines, testing water and electricity, processing and manufacturing pipe jacking equipment, preparing various pipelines and required auxiliary objects according to jacking length, and organizing materials into the site in batches in stages according to a material plan;
C. material preparation
Selecting high-density high-pressure polyethylene pipes made of PE (polyethylene) with the same pipe diameter, selecting standard pipes with detection reports and qualification certificates every 6 meters, ensuring that the pipe walls are uniform in thickness and size, then processing the raw materials of the PE pipes into short pipe connection units by using a precision lathe, wherein each section of 50 cm-long short pipe is provided with a spigot-and-socket letter lock catch, the spigot-and-socket lap joint length of each short pipe is 10 cm, the gap after tightening is 0.15 mm, the groove depth of a pipe head sealing ring is 2.7 mm, and the groove width is 2.8 mm;
D. preparation of construction site
Removing and transferring the obstacles, enclosing a construction area with water, laying a temporary construction pavement, transporting machinery, equipment and materials to the site, laying temporary water, and building a temporary facility;
E. upstream water source plugging port
The underground personnel enter the air bag into an upstream pipeline, the air pump is inflated to isolate a water source, a reamer sewage pump is installed, and water is pumped to a downstream municipal pipeline by a water hose;
F. pipeline dredging
Repeatedly flushing an original pipeline by using a cleaning vehicle, pulling sludge and sundries to a sewage well, conveying the sewage well into a ground dredging vehicle by using a bucket for a downhole worker, pumping the sludge in the sewage well by using a sanitation sewage suction vehicle, and observing the internal collapse condition of the pipeline by using a pipeline endoscope camera system and a CCTV video detector;
G. build push bench platform
The method comprises the following steps of (1) descending a well, building a hydraulic pipe jacking machine operating room, shaving a sewer at the bottom of a sewage well by using an air pick, installing a pipe jacking machine protection support, breaking grooves with the width of 7 cm and the depth of 15 cm on two sides of a drain chute of a well chamber at the bottom of the well chamber, installing a pressure-bearing steel plate, and then fixing a press base by using quick-setting cement;
H. penetrating rod and original crushing pipeline
Assembling a pipe drawing unit, pushing each ejector rod with the length of 50cm to a downstream well chamber by using a pipe pushing machine, enabling the ejector rods to penetrate out of the downstream well chamber, installing a crusher after the ejector rods are pushed to the downstream well chamber, keeping a crushing cutter vertical, and observing pressure change of a hydraulic pump in a pull-back process;
I. cleaning up fragments of pipeline and internal investigation
Pushing each ejector rod with the length of 50cm to a downstream well chamber by using a push bench, installing a desilting device, pulling back the push bench, pulling the cement pipeline fragments to a sewage well, transporting the fragments into a ground garbage truck by using a water bucket, and observing the inside of the pipeline for cleaning by using a pipeline endoscope camera system;
J. reaming and internal investigation
Pushing the ejector rod to a downstream well chamber by using a push bench, installing a reamer, pulling back the reamer, simultaneously performing slurry wall protection in the pulling back process, and observing the hole condition in the pipeline by using a pipeline endoscope camera system;
K. pipe jacking operation and fixed pipeline
Installing a sealing ring on a snap fastener of a processed 50 cm-long PE pipe, brushing a sealant, jacking the PE pipe into a hole by using a pipe jacking machine, jacking the PE pipe to a downstream well chamber to protrude 20 cm of the well wall, punching a hole with the width of 10 cm, the depth of 10 cm and the length of 20 cm at the bottom of a PE pipe orifice of the two well chambers by using a hammer, then inserting 3 round steel bars with the length of 20 cm into the hole by clinging to the pipe orifice, smearing quick setting cement, and trowelling and polishing;
l, repairing sewage well and removing water source plug
Building a water flowing groove by red bricks, leveling the water flowing groove by quick-setting cement according to the original gradient, restoring the water flowing groove to the original well chamber state, and taking out the plugging air bag by a person going into the well;
and o, cleaning the site, checking and accepting water, cleaning the site, cleaning the residue soil and the garbage, and checking and accepting water.
(10) Cleaning the site: after the repair is completed: and removing the used construction machines, waste materials, construction wastes and temporary facilities out of the construction site.
Therefore, the construction process for rebuilding and expanding the drainage pipe network by adopting the steps solves the problem of replacing the plastic pipes which cannot be solved by other pipe expanding methods, is the only feasible non-excavation method for updating the small-diameter plastic pipelines, reduces the treatment pressure of a sewage plant and protects the water environment.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (8)
1. A construction process for rebuilding and expanding an expanded stay tube of a drainage pipe network is characterized by comprising the following steps:
(1) pre-investigation: opening an inspection well for QV detection;
(2) applying for occupying road, breaking road and dismantling: according to a design drawing and a site survey result, reporting corresponding road-breaking occupation and structures to be dismantled to a supervision and construction unit, and drawing a road-breaking plane map of each pipe section;
(3) measuring lofting and enclosing: according to the approved broken road occupying plan, measuring and releasing edge lines of road surfaces needing to be broken of corresponding pipe sections, popping the edge lines by adopting an ink fountain, temporarily enclosing by adopting a water horse, and placing a bulletin board, a warning mark and a guide board;
(4) plugging: in the pipe section repairing construction, safe blocking is carried out on the pipeline, and an air bag blocking method or a wall body blocking method is adopted as a blocking method;
(5) flow guiding: before construction of a certain section of sewage pipeline, plugging the opening of an inspection well pipe at the starting end of the section, arranging a water pump and a water hose in an inspection well upstream of the inspection well, guiding water to another section of sewage pipeline, raising the water level in the pipeline after plugging of the pipeline, arranging a specially-assigned person to take care of water guiding equipment, and synchronously adding the water guiding equipment when the water amount is increased;
(6) clearing and dredging: the method comprises the following steps that an injection nozzle is inserted into a pipeline for clearing blockage from downstream well construction, the pipeline penetrates or crosses the blockage, then the blockage material is cleared by the force of a spraying machine along with the pulling back of a hose, two construction standards of downstream working well construction or upstream maintenance well construction are set according to the working direction of an operator and the selection of a nozzle, and then the pipeline is cleaned;
(7) CCTV detection: the CCTV detection method comprises adopting water level lowering measure to make water level in pipeline not more than 20% of pipeline diameter, making the advancing direction of crawler consistent with water flow direction, making pipe diameter not more than 500mm, making the advancing speed of direct vision photography not more than 0.15m/s, detecting the moving track of camera lens on the axial line of pipeline, making the deviation not more than +/-10% of pipe diameter, placing crawler carrying lens at the initial position of detection, starting detection, after the detection of each pipe section is completed, correcting the displayed numerical value of counter according to the mark length on cable, making image keep forward horizontal in the process of direct vision photography, when the crawler is in advancing process, when the zoom function is used, the crawler is kept in static state, when the crawler is in advancing process, firstly restoring the focal length of lens to the shortest focal length position, when defects are found in the detection process, the crawler is stopped at the position where the defects are analyzed;
(8) pretreatment, path breaking, comprehensive pipe verification and CCTV detection: cutting and removing foreign matters in the pipeline by using a milling cutter robot, cleaning the pipeline again by using a high-pressure cleaning vehicle after the milling cutter robot cuts defects, sucking sediments washed out by high pressure into a tank body by using a sewage suction vehicle, cutting the road surface along the edge line by using a cutting machine according to the edge line of the broken road for lofting measurement, breaking a road surface structure layer by using a breaking hammer, loading the broken road surface structure layer by using a muck excavator, transporting the loaded road surface structure layer to a specified waste soil site of a construction unit, and performing comprehensive pipeline verification on the inside of the excavated pipeline section after the road structure layer is excavated;
(9) rebuilding a new pipeline: adopt static expand tube method to construct, rely on hydraulic cylinder to provide pulling force and pull cutter and expand the tube head, expand the tube head and link to each other with new pipeline, cut old pipeline when the cutter is pulling at the pull rod, expand the tube head simultaneously and extrude old pipeline piece and get into soil around, new pipeline is also laid thereupon and is accomplished, the concrete technology of above-mentioned static expand tube method construction is:
A. pipeline replacement-related data replacement size
The diameter range of the sewage pipeline is 50mm to 1000mm, the replacement length is 10m to 250m, the pipe diameter increase size range is 20 percent to 50 percent, and the depth range is 1m to 5 m;
B. preparation before construction
Carrying out construction measurement and site paying-off work, determining the accurate positions of obstacles in a pipeline range and a site required by construction, building temporary facilities according to a construction plane layout drawing, installing temporary water and electric lines, testing water and electricity, processing and manufacturing pipe jacking equipment, preparing various pipelines and required auxiliary objects according to jacking length, and organizing materials into the site in batches in stages according to a material plan;
C. material preparation
Selecting high-density high-pressure polyethylene pipes made of PE (polyethylene) with the same pipe diameter, selecting standard pipes with detection reports and qualification certificates every 6 meters, ensuring that the pipe walls are uniform in thickness and size, then processing the raw materials of the PE pipes into short pipe connection units by using a precision lathe, wherein each section of 50 cm-long short pipe is provided with a spigot-and-socket letter lock catch, the spigot-and-socket lap joint length of each short pipe is 10 cm, the gap after tightening is 0.15 mm, the groove depth of a pipe head sealing ring is 2.7 mm, and the groove width is 2.8 mm;
D. preparation of construction site
Removing and transferring the obstacles, enclosing a construction area with water, laying a temporary construction pavement, transporting machinery, equipment and materials to the site, laying temporary water, and building a temporary facility;
E. upstream water source plugging port
The underground personnel enter the air bag into an upstream pipeline, the air pump is inflated to isolate a water source, a reamer sewage pump is installed, and water is pumped to a downstream municipal pipeline by a water hose;
F. pipeline dredging
Repeatedly flushing an original pipeline by using a cleaning vehicle, pulling sludge and sundries to a sewage well, conveying the sewage well into a ground dredging vehicle by using a bucket for a downhole worker, pumping the sludge in the sewage well by using a sanitation sewage suction vehicle, and observing the internal collapse condition of the pipeline by using a pipeline endoscope camera system and a CCTV video detector;
G. build push bench platform
The method comprises the following steps of (1) descending a well, building a hydraulic pipe jacking machine operating room, shaving a sewer at the bottom of a sewage well by using an air pick, installing a pipe jacking machine protection support, breaking grooves with the width of 7 cm and the depth of 15 cm on two sides of a drain chute of a well chamber at the bottom of the well chamber, installing a pressure-bearing steel plate, and then fixing a press base by using quick-setting cement;
H. penetrating rod and original crushing pipeline
Assembling a pipe drawing unit, pushing each ejector rod with the length of 50cm to a downstream well chamber by using a pipe pushing machine, enabling the ejector rods to penetrate out of the downstream well chamber, installing a crusher after the ejector rods are pushed to the downstream well chamber, keeping a crushing cutter vertical, and observing pressure change of a hydraulic pump in a pull-back process;
I. cleaning up fragments of pipeline and internal investigation
Pushing each ejector rod with the length of 50cm to a downstream well chamber by using a push bench, installing a desilting device, pulling back the push bench, pulling the cement pipeline fragments to a sewage well, transporting the fragments into a ground garbage truck by using a water bucket, and observing the inside of the pipeline for cleaning by using a pipeline endoscope camera system;
J. reaming and internal investigation
Pushing the ejector rod to a downstream well chamber by using a push bench, installing a reamer, pulling back the reamer, simultaneously performing slurry wall protection in the pulling back process, and observing the hole condition in the pipeline by using a pipeline endoscope camera system;
K. pipe jacking operation and fixed pipeline
Installing a sealing ring on a snap fastener of a processed 50 cm-long PE pipe, brushing a sealant, jacking the PE pipe into a hole by using a pipe jacking machine, jacking the PE pipe to a downstream well chamber to protrude 20 cm of the well wall, punching a hole with the width of 10 cm, the depth of 10 cm and the length of 20 cm at the bottom of a PE pipe orifice of the two well chambers by using a hammer, then inserting 3 round steel bars with the length of 20 cm into the hole by clinging to the pipe orifice, smearing quick setting cement, and trowelling and polishing;
l, repairing sewage well and removing water source plug
Building a water flowing groove by red bricks, leveling the water flowing groove by quick-setting cement according to the original gradient, restoring the water flowing groove to the original well chamber state, and taking out the plugging air bag by a person going into the well;
o, cleaning site and water passing acceptance check
Cleaning the site, cleaning the residue soil and the garbage, introducing water, and checking and accepting;
(10) cleaning the site: and after the repair is finished, removing the used construction machines, waste materials, construction wastes and temporary facilities out of the construction site.
2. The drainage pipe network rebuilding and expanding expansion pipe drawing construction process according to claim 1, characterized in that: and (4) plugging each lower rubber air bag at the upstream and downstream of the cleaning area section, cutting off all water inlet sources, controlling the corresponding water level, plugging 1 air bag at the upper opening and the lower opening of the upstream and downstream well head of the pipe section to be cleaned at the lower bag position, and adding stainless steel baffle walls at two sides of the construction pipe section to support the plugged air bags.
3. The drainage pipe network rebuilding and expanding expansion pipe drawing construction process according to claim 1, characterized in that: the wall body plugging method in the step (4) is specifically that building blocks are adopted for plugging a large pipeline, the wall body thickness of the plugged pipeline is set according to the maximum thrust, one to two short pipes for temporary drainage are embedded in advance during wall building, the reserved pipe is sealed after the wall body reaches the use strength, and similarly, when the wall body is dismantled, the plugs in the reserved pipe are firstly removed, the water level is reduced, and then the wall body is dismantled manually.
4. The drainage pipe network rebuilding and expanding expansion pipe drawing construction process according to claim 3, characterized in that: the wall material of the plugging is common bricks and building blocks.
5. The drainage pipe network rebuilding and expanding expansion pipe drawing construction process according to claim 1, characterized in that: in the step (6), the construction of the downstream working well is specifically to put a hose and an injection nozzle into the downstream manhole, select to use a nozzle of a reverse type spraying machine, insert the nozzle and the hose into the front face of the plugging part, start the high-pressure pump, keep the nozzle in a moving state all the time through a backward working mode of the nozzle, and when the nozzle passes through a blockage, keep a playback rate of 100 plus 200mm/s to pull fragments generated in the injection operation process to the direction of the manipulator through the hose and the head so as to periodically wash the fragments from the sewage pipeline, and simultaneously keep the water pressure.
6. The drainage pipe network rebuilding and expanding expansion pipe drawing construction process according to claim 1, characterized in that: and (6) selecting a nozzle with a backward and forward type spraying machine from the upstream manhole construction, inserting the nozzle and a hose into the front surface of the plugging part, starting the high-pressure pump, keeping the nozzle in a moving state all the time when the nozzle works, and clearing through a backward and forward type working mode of the nozzle.
7. The drainage pipe network rebuilding and expanding expansion pipe drawing construction process according to claim 1, characterized in that: and (3) cleaning the pipeline in the step (6) by adopting high-pressure cleaning, specifically, starting construction from a downstream wellhead, placing a nozzle and a hose into the pipeline, before starting a pump, placing a spray head at the tail end of the pipeline, using a reflection nozzle spray head to ensure that the spray head is in a motion state, controlling the water flow in the pipeline when the spray head is below the water surface, sending the spray head into the pipeline to be cleaned, washing impurities in the pipeline into a downstream working well in the pulling-back process, removing the impurities, controlling the reversing speed to be 100 and 200mm/s, pumping the mixture washed out from the cleaning well by using a sewage suction truck or a slurry pump while cleaning the pipeline at high pressure, and loading the cleaned sludge and garbage into a woven bag and transporting the woven bag to a designated place.
8. The drainage pipe network rebuilding and expanding expansion pipe drawing construction process according to claim 1, characterized in that: and (4) manually excavating 60cm wide grooves at corresponding positions of the comprehensive pipelines in the verification method of the comprehensive pipelines in the step (8), wherein the lengths of the grooves are that the intersection positions of the comprehensive pipelines and the excavated pipe sections extend 1 meter along the direction of the excavated pipe sections respectively, and all the comprehensive pipelines marked in the design drawing are found.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056126.XA CN110747965B (en) | 2019-10-31 | 2019-10-31 | Expansion-draw pipe construction process for reconstruction and expansion of drainage pipe network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056126.XA CN110747965B (en) | 2019-10-31 | 2019-10-31 | Expansion-draw pipe construction process for reconstruction and expansion of drainage pipe network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110747965A CN110747965A (en) | 2020-02-04 |
| CN110747965B true CN110747965B (en) | 2021-02-19 |
Family
ID=69281669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911056126.XA Active CN110747965B (en) | 2019-10-31 | 2019-10-31 | Expansion-draw pipe construction process for reconstruction and expansion of drainage pipe network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110747965B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982210B (en) * | 2020-07-02 | 2021-07-06 | 清华大学 | Drainage pipe network batch monitoring and distribution method for diagnosing rainfall inflow infiltration problem |
| CN111853418B (en) * | 2020-07-02 | 2022-06-03 | 深圳市市政工程总公司 | Construction method for pipeline repair |
| CN113175069A (en) * | 2021-04-29 | 2021-07-27 | 北京市政建设集团有限责任公司 | Detection method and equipment for sewage pipeline |
| CN113531274A (en) * | 2021-08-16 | 2021-10-22 | 广东润球实业有限公司 | Pipeline non-excavation repairing method |
| CN114250846B (en) * | 2021-12-29 | 2024-04-26 | 上海辉拓市政工程有限公司 | Repairing method for short tube replacement |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121268A (en) * | 2011-02-22 | 2011-07-13 | 北京万兴建筑集团有限公司 | Method for replacing sewage pipeline |
| KR101953105B1 (en) * | 2018-06-08 | 2019-02-28 | 강상수 | Underwater non-segregation cement concrete composition and construction method for expanding sectional area of water flow in sewage box |
| CN108797760A (en) * | 2018-06-19 | 2018-11-13 | 新疆铁道勘察设计院有限公司 | The construction method of rail yard drainage pipeline temporary support structure |
| CN110185133B (en) * | 2019-05-05 | 2021-04-06 | 上海信立生态环境工程有限公司 | Method for cleaning sewage pipeline |
| CN110387940A (en) * | 2019-07-22 | 2019-10-29 | 广东天濠建设工程有限公司 | Municipal subsoil drain pipeline construction method |
-
2019
- 2019-10-31 CN CN201911056126.XA patent/CN110747965B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110747965A (en) | 2020-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110747965B (en) | Expansion-draw pipe construction process for reconstruction and expansion of drainage pipe network | |
| CN110185844B (en) | Shallow-earthing large-diameter pipe jacking construction method | |
| CN206973157U (en) | A kind of Non-excavation pipeline restoration device and renovation technique of short tube connection | |
| CN110735992A (en) | CIPP ultraviolet curing repair construction method | |
| CN105673935B (en) | Split slotting method underground utilities replacing options | |
| CN109210315A (en) | A kind of Non-excavation pipeline restoration device and renovation technique of short tube connection | |
| KR100594825B1 (en) | A method for repairing a sewer pipe using liner | |
| CN110762331A (en) | Local resin curing construction process for reconstruction and expansion of drainage pipe network | |
| CN111502682B (en) | Trenchless pipe jacking construction device and construction method | |
| CN111853418B (en) | Construction method for pipeline repair | |
| CN107763362A (en) | Interior piston ring method pipe joint method for repairing and constructing | |
| CN108591614B (en) | Construction method for passing through multiple pipes in old gas pipeline | |
| CN112012757A (en) | Muddy water balance type pipe jacking machine and construction process thereof in flowing sand stratum | |
| CN112762269A (en) | Construction method for repairing underground pipeline | |
| KR102150301B1 (en) | Water pipe cleaning method using high pressure nitrogen and Water pipe cleaning device used therefor | |
| CN115492215A (en) | Non-excavation dredging and repairing construction method for drainage pipeline | |
| CN113622961A (en) | Long-distance pipe-jacking construction method for long-distance heat transmission network steam pipe with large diameter | |
| CN114215994A (en) | Pipeline repairing construction method | |
| JP4510922B1 (en) | How to clean buried sewage pipes | |
| CN114250846A (en) | Short pipe replacement repairing method | |
| CN109780321A (en) | A kind of system recycling solution based on old man-made coal-gas pipeline | |
| CN214363571U (en) | Underground cavern dewatering system free of influence of obstacles | |
| CN218671144U (en) | Be used for burying prosthetic device of buried water supply and drainage pipeline inside lining non-excavation | |
| CN113279429B (en) | Underground diversion operation plugging structure and plugging method | |
| CN220266778U (en) | Non-excavation short pipe of drainage pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 300450 No.285 Zhonghuan West Road, free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Applicant after: CHINA RAILWAY 18TH BUREAU GROUP Co.,Ltd. Applicant after: CHINA RAILWAY 18TH BUREAU GROUP CONSTRUCTION AND INSTALLATION ENGINEERING Co.,Ltd. Address before: 300450 No.285 Zhonghuan West Road, free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Applicant before: CHINA RAILWAY 18TH BUREAU GROUP CONSTRUCTION AND INSTALLATION ENGINEERING Co.,Ltd. Applicant before: CHINA RAILWAY 18TH BUREAU GROUP Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |