CN113833928A - Construction method for intercepting and sealing large-diameter deep-buried drain pipe - Google Patents
Construction method for intercepting and sealing large-diameter deep-buried drain pipe Download PDFInfo
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- CN113833928A CN113833928A CN202010578438.3A CN202010578438A CN113833928A CN 113833928 A CN113833928 A CN 113833928A CN 202010578438 A CN202010578438 A CN 202010578438A CN 113833928 A CN113833928 A CN 113833928A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/12—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ
- F16L55/128—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose
- F16L55/132—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing
- F16L55/134—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing by means of an inflatable packing
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
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Abstract
A large-caliber deep-buried drain pipe closure sealing construction method belongs to the technical field of buried drain pipe maintenance construction, a group of sealing steel plates are hermetically jacked on the inner wall of a well by a group of adjusting support rods through the opposite inner wall of the well of an inspection well to form a drain pipe sealing structure, and the construction process comprises the following steps: lowering the sealing steel plates one by one and blocking the sealing steel plates on the inner wall of the well to block the pipe orifice of the sewage pipe to be sealed, connecting a group of sealing steel plates into a whole by using a connecting steel bar, and tightly supporting each sealing steel plate and the upper part and the lower part between the opposite inner walls of the well by adopting horizontally arranged adjusting support rods; the technical scheme has novel design and reasonable conception, ensures that the sealing and dismantling processes are extremely simple, the operation time is short, the labor intensity is low, the construction controllability is high, the stable high impact resistance can be kept all the time in the use process, the safety of the sealing construction and the overhaul process is ensured, the sealing material is repeatedly utilized, the construction cost can be reduced, the building garbage emission is reduced, the energy conservation and emission reduction are promoted, and the environment is protected.
Description
Technical Field
The invention belongs to the technical field of maintenance and construction of underground sewage pipes, and particularly relates to a construction method for intercepting and sealing a large-diameter deep-buried sewage pipe.
Background
The large-diameter deep-buried sewage discharge pipe generally refers to a sewage discharge pipe with the diameter of not less than 1200mm and the buried position basically more than 6-8m, the buried position of the sewage discharge pipe even reaches more than 15 m in some special areas, the sewage flow in the sewage discharge pipe is large, the running water is high, taking the sewage discharge pipe with the diameter of 1500m as an example, the daily sewage flow of the sewage discharge pipe reaches 8 ten thousand tons, and the design pressure of the pipeline is 1.6 MPa; in order to facilitate regular maintenance, cleaning and dredging, inspection wells are generally arranged at the intersection of drainage pipelines, a turning part, a pipe diameter or gradient changing part, a drop part and a straight pipe section at intervals, the inspection wells are communicated with pipelines, and the water level in the inspection wells is at least higher than a drainage pipe; when the regular maintenance or the emergency repair and maintenance of the pipeline are required, the drainage pipe in the maintenance or emergency repair section needs to be blocked, and then the sewage in the interception section is discharged through the water pump; the blow off pipe shutoff is generally selected at the intersection of blow off pipe and inspection shaft, adopts rubber gasbag and brick wall to the mouth of pipe shutoff at the blow off pipe mouth of pipe, stops up the pipeline with rubber gasbag earlier, then builds a wall at the mouth of pipe, and the main following problem that has of current brick wall shutoff mouth of pipe in practical application:
1) the construction difficulty is high: the water level of the inspection well is higher than that of the drain pipe, the wall building at the pipe opening of the drain pipe is diving operation, different from the common wall building on land, the construction difficulty is quite large, and the requirement of the diving operation is provided for constructors because the constructors need to dive into water for construction;
2) the construction period is long: the wall building is that blocks are connected together through special cement, taking a drain pipe with the diameter of 1500mm as an example, the wall building is completed in all basically normal conditions about half a day, the wall dismantling is more time-consuming, the wall dismantling operation generally needs more than one day because the requirement of strong impact resistance of the wall is high and the adhesive force between the blocks is larger;
3) the plugging cost is high: the wall building plugging is operated in water, and the requirement on the impact strength of a wall body is high, so that the requirement on cement is extremely high, the adopted cement is special cement, a blow-off pipe with the diameter of 1500mm is taken as an example, the cost of the brick heads and the cement used for building the pipe orifice plugging wall is about 1 ten thousand RMB, when the overhaul or rush-repair operation is finished, the wall body needs to be dismantled, the cement and the brick blocks become waste products, the discharge amount of construction waste is increased, and the disposal of the construction waste needs to bear corresponding cost;
4) the construction risk is high: firstly, the wall building operation is completely submerged operation and has long operation time, sewage in the pipeline has various rotten objects, and the risk of long-time operation is high; secondly, if the rubber air bag at the front part cannot bear the impact of water drainage in the pipe in the construction process, the rubber air bag can be flushed out, the sealing brick wall collapses, sewage in a house can be flushed out at a more urgent and larger flow rate, constructors can be flushed away by the torrent in the pipe, particularly, when severe weather such as rainstorm occurs in the construction process or the upstream discharge amount is increased suddenly, the water level in an adjacent inspection well rises, the water flow in the pipe is more urgent, the impact force is larger, and the situation can cause that operators in the wall building and wall dismantling construction processes face a great risk of being flushed away by running water;
5) the danger of the overhaul operation is high: the risk is mainly caused by that the impact strength can not meet the related requirement due to the fact that the construction quality can not meet the set requirement, the wall building construction is diving operation, workers dive into sewage to build a wall, the working environment is extremely bad, the quality stability of the wall is subject to a plurality of human factors, for example, the proficiency of the workers, the sight obstacle of the diving operation, the cement curing condition in the field construction process and the like can possibly cause that the quality of the wall can not meet the set requirement, so that the impact resistance of the wall is reduced, when the maintenance or the emergency repair is carried out, rainstorm or the discharge of overlarge flow is encountered, the drainage capacity of a temporary discharge pipeline is often lower than that of a normal pipeline, so that the water level in an inspection well can be rapidly increased, the pressure born by a closure position can be rapidly increased, if the limit wall is exceeded, the wall can be washed down, and the staff carrying out the maintenance or the emergency repair operation in the pipeline can encounter the sudden super sewage, there is a risk of being washed away by the sewage.
In conclusion, the traditional wall building method for intercepting and plugging the large-diameter and deep-buried sewage discharge pipe has various defects, the plugging method which is low in cost, easy and safe in construction, large in impact resistance and stable is found, and the problem which needs to be solved urgently in the implementation of overhauling or rush-repair operation of the large-diameter and deep-buried sewage discharge pipe is solved.
Disclosure of Invention
The invention aims to provide a technical scheme of a large-caliber deep-buried sewage discharge pipe closure sealing construction method based on a construction idea of breaking up whole parts by utilizing the self impact resistance of an inspection well and the stable impact resistance of a sealing steel plate so as to overcome the problems in the prior art.
The heavy-calibre buries a blow off pipe deep and dams construction method of sealing up, wait to seal the blow off pipe and link to each other with the well inner wall intersection of inspection shaft, its characterized in that seals a set of steel sheet sealing top with the help of the subtend well inner wall of inspection shaft by a set of regulation vaulting pole and constitutes blow off pipe seal structure on the well inner wall, a set of steel sheet that seals constitutes a combination through connecting the billet, adjacent seal between the steel sheet and cooperate, its work progress includes following step:
1) material preparation, including but not limited to: the sealing steel plates and the adjusting support rods are respectively in a group, and the connecting steel bars are one, wherein the number of the sealing steel plates is at least two, the number of the adjusting support rods is twice that of the sealing steel plates, and the connecting steel bars and the sealing steel plates are respectively provided with corresponding bolt connecting holes;
2) the sealing steel plates are lowered into the inspection well one by one and are blocked on the inner wall of the inspection well intersected with the to-be-sealed drain pipe, and the group of sealing steel plates completely blocks the pipe orifice of the to-be-sealed drain pipe;
3) a group of sealing steel plates are connected into a whole by a connecting steel bar, and the connecting steel bar is fixedly connected with each sealing steel plate by bolts;
4) the upper part and the lower part between each sealing steel plate and the inner wall of the opposite well of the inspection well are respectively supported tightly by adopting a horizontally arranged adjusting support rod.
2. The heavy-calibre deep buried drain pipe closure sealing construction method of claim 1, characterized in that the thickness of the sealing steel plate requires that its impact strength is greater than the impact strength of the drain pipe wall, the length of the sealing steel plate is greater than the drain pipe outer diameter, the sum of the widths of a group of sealing steel plates is greater than the drain pipe outer diameter, wherein the lateral position of the middle part of two sealing steel plates is provided with steel bar slots for installing and connecting steel bars in the same direction, the two steel plates provided with steel bar slots in step 2) are installed on both sides.
3. The large-diameter deep-buried sewage pipe closure sealing construction method according to claim 1, wherein the bolt connecting holes in each sealing steel plate are cooperatively arranged at a central position, the connecting steel bars are made of steel plates or channel steel and have bending strength greater than the impact strength of the sealing steel plates, a group of bolt holes are correspondingly arranged on the connecting steel bars corresponding to the bolt hole intervals after the sealing steel plates are combined, and the connecting steel bars and each sealing steel plate in the step 3) are fixedly connected through the arranged bolt holes by bolts.
4. The method for intercepting and sealing a large-diameter deep-buried sewage pipe according to claim 1, wherein the adjusting stay bar adopts an adjustable screw structure, in the step, the adjustable screw is rotated to extend the adjusting stay bar until the two ends of the adjusting stay bar are in abutting contact fit with the sealing steel plate and the inner wall of the inspection well, and the fitting position of the adjusting stay bar and the sealing steel plate is arranged outside the pipe orifice of the sewage pipe to be sealed.
5. The construction method for intercepting and sealing the large-diameter deep-buried sewage pipe according to claim 1, wherein in the step, a sealing gasket between every two adjacent sealing steel plates is arranged in a matching way, and a sealing gasket is arranged between the sealing steel plate assembly and the inner wall (5 a) in a matching way.
6. The construction method for intercepting and sealing the large-caliber deep-buried sewage pipe according to claim 1, wherein the step 2) comprises the following steps before:
the rubber air bag is arranged in the sewage pipe to be sealed from the pipe orifice of the intersection of the sewage pipe to be sealed and the inspection well, and the rubber air bag is inflated until the outer wall of the rubber air bag is propped against the inner wall of the sewage pipe to be sealed;
one of the group of sealing steel plates is provided with a thread hole and a sealing ring in sealing fit with the thread hole, and the inflation tube and the fixing rope of the rubber air bag are led out in the step 2) through the thread hole and the sealing ring in a sealing way.
The large-caliber deep-buried drain pipe closure sealing construction method is novel in design and reasonable in conception, a very stable and high-strength drain pipe sealing steel wall is constructed by a group of sealing steel plates and a group of adjusting support rods at the pipe orifice of the drain pipe to be sealed by means of the two-way inner wall of the inspection well, the sealing steel wall can always keep stable high impact resistance in the use process, the situations of collapse caused by collapse can be completely avoided, the safety of related sealing construction and rush repair operation process is practically guaranteed, the sealing construction and dismantling operation process can be extremely simple by applying the scheme, the operation time is short, the labor intensity is small, the construction is high, the construction efficiency can be obviously improved, materials for sealing can be repeatedly utilized, the construction cost is reduced, the emission of construction wastes is reduced, the energy conservation and emission reduction are promoted, the resources are reduced, and the environment is protected.
Drawings
FIG. 1 is a schematic diagram of the present invention in an application field;
FIG. 2 is a schematic view of the method for assembling the sealing steel plate;
in the figure: 1-a sewage pipe to be sealed, 2-a rubber air bag, 3-a sealing gasket, 4-a sealing steel plate, 5-an inspection well, 5 a-an opposite well inner wall, 5 b-a well inner wall, 6-an adjusting support rod, 7-a sewage pipe to be detected, 8-a connecting steel bar, 9-a steel bar slot, 10-a bolt, 11-a threading hole and 12-an inter-plate sealing gasket.
Detailed Description
The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which:
as shown in the figure, the large-diameter deep-buried sewage pipe closure plugging construction site is a large-diameter deep-buried sewage pipe closure plugging construction site, an inspection well 5 is of a square structure, the sewage pipe is positioned at the lower part of the inspection well 5, the area shown in figure 1 is a filled sewage area before closure drainage, the sewage liquid level in the inspection well 5 is higher than the sewage pipe, the area needing closure drainage is a sewage pipe 7 to be detected on the right side of the inspection well 5, the closure plugging construction is carried out at the junction of the left sewage pipe 1 to be sealed and the inspection well 5, a group of sealing steel plates 4 are tightly propped against the inner wall 5b of the inspection well 5 where the pipe orifice of the sewage pipe 1 to be sealed is positioned by a group of adjusting support rods 6 through the opposite inner wall 5a of the inspection well 5 to form a sewage pipe sealing structure, the group of sealing steel plates 4 is at least composed of two blocks, all the sealing steel plates 4 are constructed into a combined body through connecting steel bars 8, the adjacent sealing steel plates 4 are in sealing fit, the combined body of the group of the sealing steel plates 4 is in sealing fit with the inner wall 5b of the inner wall, the field construction comprises the following steps:
1) material preparation, including but not limited to: the device comprises a rubber airbag 2, a set of corresponding inflation equipment, a sealing steel plate 4, a set of adjusting support rods 6, a connecting steel bar 8, a related sealing element, crane equipment and the like, wherein the specification of the rubber airbag 2 and the specification of the sealing steel plate 4 are selected and determined according to the diameter of a sewage pipe 1 to be sealed respectively; wherein the maximum diameter of the rubber air bag 2 after being inflated is larger than the inner diameter of the sewage pipe 1 to be sealed; the sealing steel plate 4 is at least two, the thickness of the sealing steel plate 4 requires that the impact strength is greater than that of the pipe wall of the sewage discharge pipe, the length of the sealing steel plate 4 is greater than the outer diameter of the sewage discharge pipe, the sum of the widths of a group of sealing steel plates 4 is greater than the outer diameter of the sewage discharge pipe, steel bar slots 9 for connecting steel bars 8 are arranged in the same direction at the side positions of the middle parts of the two sealing steel plates 4, the steel bar slots 9 can be formed by welding L-shaped channel steel on the sealing steel plates 4, bolt connecting holes are arranged in the middle positions of the sealing steel plates 4 in a matched mode, and a threading hole 11 and a sealing ring are arranged on one sealing steel plate 4 in a matched mode; the configuration number of the adjusting support rods 6 is twice that of the sealing steel plates 4, the length of the adjusting support rods 6 can be adjusted by rotating the inner rod by adopting an adjustable screw rod structure, the minimum length of the adjusting support rods 6 is smaller than the distance between the sealing steel plates 4 and the opposite inner wall of the inspection well 5, and the maximum length of the adjusting support rods is larger than the distance between the sealing steel plates 4 and the opposite inner wall 5a of the inspection well 5; the connecting steel bar 8 is made of steel plates or channel steel, the bending strength of the connecting steel bar 8 is considered to be greater than the impact strength of the sealing steel plate 4, a group of bolt holes are correspondingly arranged on the connecting steel bar 8 corresponding to the bolt hole intervals after the sealing steel plate 4 is combined, and the length of the connecting steel bar 8 is smaller than the combined width of the sealing steel plate 4;
2) the rubber air bag 2 is arranged in the sewage pipe 1 to be sealed from the pipe orifice of the intersection of the sewage pipe 1 to be sealed and the inspection well 5, and the rubber air bag 2 is inflated until the outer wall of the rubber air bag is pushed against the inner wall of the sewage pipe to block sewage in the pipe;
3) the sealing steel plates 4 are put into the inspection well 5 one by one, the sealing steel plates 4 are blocked on the inner wall 5b of the inspection well 5 intersected with the sewage pipe 1 to be sealed, the two sealing steel plates 4 provided with the steel bar slots 9 are correspondingly placed on the outermost sides of the two sides, the openings of the steel bar slots 9 are upward, one group of sealing steel plates 4 completely block the pipe orifice of the sewage pipe 1 to be sealed, a sealing gasket 3 is arranged between the sealing steel plates 4 and the end surface of the sewage pipe, and the splicing parts of the adjacent sealing steel plates 4 are respectively provided with inter-plate sealing gaskets 12; when the sealing steel plate 4 provided with the threading hole 11 is placed, the inflation tube and the fixing rope of the rubber airbag 2 in the step 2) are led out from the threading hole 11, and a sealing ring is installed, so that the inflation tube and the fixing rope of the rubber airbag 2 pass through the sealing steel plate 4 in a sealing manner;
4) the connecting steel bar 8 is transversely inserted into steel bar slots 9 on the sealing steel plates 4 at two sides, and then the connecting steel bar 8 and each sealing steel plate 4 are fixed by bolts 10 through bolt connecting holes arranged on each sealing steel plate 4 and a group of bolt connecting holes correspondingly arranged on the connecting steel bar 8 to form a sealing steel plate of a connected mechanism;
5) each sealing steel plate 4 and the opposite well inner wall 5a of the inspection well 5 are respectively supported tightly by an adjusting stay bar 6 which is horizontally arranged at the upper and lower parts, the matching position of the adjusting stay bar 6 and the sealing steel plate 4 is arranged outside the pipe orifice of the sewage pipe 1 to be sealed, and the adjustable screw is rotated during installation to enable the adjusting stay bar 6 to extend to the two ends of the adjusting stay bar 6 to be respectively in contact fit with the sealing steel plate 4 and the opposite well inner wall 5 a;
through the above construction steps, a set of adjusting support rods 6 tightly prop the sealing steel plate 4 on the inner wall 5b of the inspection well 5 where the pipe orifice of the sewage pipe 1 is to be sealed by means of the opposite well inner wall 5a of the inspection well 5, so that a very stable sewage pipe sealing steel wall is formed, the impact strength is high, the structure is stable, the maintenance can be always kept, and the collapse and the like can not be caused by structural change in the construction and use processes.
The sealing steel wall constructed in the embodiment has the advantages of simple construction process, short operation time of field operators in sewage, simple operation method, reduced construction difficulty and strength, improved field operation conditions, less interference factors in construction and capability of ensuring expected implementation of construction; meanwhile, the impact resistance of the constructed sealing steel wall is higher than that of a sewage discharge pipe in design, the sealing steel wall has good stability, a safe and reliable operation environment can be provided for subsequent rush repair implementation, even if the sudden water discharge is increased, the sealing steel plate 4 cannot be flushed away, the safe construction environment for rush repair is practically ensured, and the successful implementation of the rush repair is ensured.
When the sealing steel wall which is arranged at the pipe orifice of the sewage pipe 1 to be sealed and supported in the embodiment needs to be dismantled, the adjusting support rod 6 is firstly shortened to the state that the two ends of the adjusting support rod are loosened with the sealing steel plate 4 and the opposite well inner wall 5a, then the bolts 10 are withdrawn to release the fixed connection between the connection steel bars 8 and the sealing steel plates 4, the connection steel bars 8 are removed, the sealing steel plates 4 are lifted out of the inspection well 5 one by one, simultaneously, the sealing gasket 3 and the sealing gasket 12 between the plates are cleaned, the whole dismantling process is extremely simple, the labor intensity is low, the construction time is short, the safety of the field operation environment is obviously improved, and the sealing steel plate 4, the adjusting stay bar 6 and the connecting steel bar 8 which construct the sealing steel wall can be recycled, the construction cost can be reduced remarkably, the emission of construction waste is reduced to the minimum, the construction waste is reduced and discharged to the real place, and the effective promotion of environmental protection is promoted.
In the embodiment, the steel plate for plugging adopts a combined structure of two or more sealing steel plates 4, and is convenient for carrying the sealing steel plates 4 and placing operation before a sewage discharge pipe in the inspection well 5 based on a construction mode of breaking up the whole into parts, if the sealing steel plates 4 adopt an integral structure, the operation cannot be carried out in a narrow deep well due to the limitation of the weight and the width of the sealing steel plates 4; taking a 1500-meter-diameter sewage discharge pipe as an example, three sealing steel plates 4 with the thickness of 2cm, the length of 2m and the width of 0.6m can be designed, so that the sealing steel plates 4 with the thickness of 2cm, the length of 2m and the width of 0.6m are carried, installed and dismantled in the construction process, sufficient construction operation space is provided in the inspection well corresponding to the 1500-meter-diameter sewage discharge pipe, and construction implementation is facilitated.
Claims (6)
1. Heavy-calibre buries position blow off pipe deep and dams construction method of sealing up, wait to seal blow off pipe (1) and the well inner wall (5 b) of inspection shaft (5) and cross and link to each other, its characterized in that seals a set of steel sheet (4) sealed top by a set of regulation vaulting pole (6) with the help of subtend well inner wall (5 a) of inspection shaft (5) and establish constitution blow off pipe seal structure on well inner wall (5 b), a set of steel sheet (4) of sealing up constitutes a combination through connecting billet (8), adjacent seal between steel sheet (4) and cooperate, its work progress includes following step:
1) material preparation, including but not limited to: the sealing steel plates (4) and the adjusting support rods (6) are respectively in a group, and one connecting steel bar (8) is arranged, wherein the number of the sealing steel plates (4) is at least two, the number of the adjusting support rods (6) is twice that of the sealing steel plates (4), and the connecting steel bar (8) and the sealing steel plates (4) are respectively provided with corresponding bolt connecting holes;
2) the sealing steel plates (4) are lowered into the inspection well (5) one by one and are blocked on the inner wall (5 b) of the inspection well (5) which is connected with the to-be-sealed sewage discharge pipe (1) in an intersecting way, and the group of sealing steel plates (4) completely block the pipe orifice of the to-be-sealed sewage discharge pipe (1);
3) a group of sealing steel plates (4) are connected into a whole by a connecting steel bar (8), and the connecting steel bar (8) is fixedly connected with each sealing steel plate (4) through bolts (10);
4) the upper part and the lower part between each sealing steel plate (4) and the opposite well inner wall (5 a) of the inspection well (5) are respectively supported tightly by adopting a horizontally arranged adjusting support rod (6).
2. The heavy-calibre deeply-buried sewage pipe closure sealing construction method according to claim 1, characterized in that the thickness of the sealing steel plate (4) requires that the impact strength is greater than the impact strength of the pipe wall of the sewage pipe, the length of the sealing steel plate (4) is greater than the outer diameter of the sewage pipe, the sum of the widths of a group of sealing steel plates (4) is greater than the outer diameter of the sewage pipe, wherein steel bar slots (9) for installing and connecting steel bars (8) are arranged in the same direction at the side positions of the middle parts of the two sealing steel plates (4), and the two steel plates provided with the steel bar slots (9) in the step 2) are installed at both sides.
3. The large-diameter deep-buried sewage pipe closure sealing construction method according to claim 1, characterized in that bolt connection holes in each sealing steel plate (4) are cooperatively arranged at a central position, the connection steel bars (8) are made of steel plates or channel steel, the bending strength of the connection steel bars is greater than the impact strength of the sealing steel plates (4), a group of bolt holes are correspondingly arranged on the connection steel bars (8) corresponding to the bolt hole intervals after the sealing steel plates (4) are combined, and the connection steel bars (8) and each sealing steel plate (4) are fixedly connected by bolts through the arranged bolt holes in step 3).
4. The heavy-calibre deep-buried position blow-off pipe closure sealing construction method according to claim 1, characterized in that the adjusting stay bar (6) adopts an adjustable screw structure, in the step 4), the adjustable screw is rotated to extend the adjusting stay bar (6) until the two ends of the adjusting stay bar (6) are in abutting contact fit with the inner walls of the sealing steel plate (4) and the inspection well (5), and the fitting position of the adjusting stay bar (6) and the sealing steel plate (4) is arranged outside the pipe orifice of the blow-off pipe (1) to be sealed.
5. The construction method for intercepting and sealing the large-caliber deep-buried sewage discharge pipe according to claim 1, wherein the sealing gaskets (12) between the adjacent sealing steel plates (4) in the step 3) are arranged in a matching way, and the sealing gasket (3) is arranged between the sealing steel plate (4) assembly and the inner wall (5 a) in a matching way.
6. The construction method for intercepting and sealing the large-caliber deep-buried sewage pipe according to claim 1, wherein the step 2) comprises the following steps before:
the rubber air bag (2) is arranged in the sewage pipe (1) to be sealed from a pipe orifice of the sewage pipe (1) to be sealed and the inspection well (5), and the rubber air bag (2) is inflated until the outer wall of the rubber air bag is propped against the inner wall of the sewage pipe (1) to be sealed;
one of the group of sealing steel plates (4) is provided with a threading hole (11) in a matching manner and a sealing ring in sealing fit with the threading hole, and the inflation tube and the fixing rope of the rubber airbag (2) are led out in the step 2) through the threading hole (11) and the sealing ring in a sealing manner.
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| CN202010578438.3A CN113833928B (en) | 2020-06-23 | 2020-06-23 | Construction method for closure sealing of large-caliber deep buried drain pipe |
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| CN202010578438.3A CN113833928B (en) | 2020-06-23 | 2020-06-23 | Construction method for closure sealing of large-caliber deep buried drain pipe |
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| CN113833928B CN113833928B (en) | 2023-07-18 |
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