CN111779887A - Underground pipeline maintenance method - Google Patents
Underground pipeline maintenance method Download PDFInfo
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- CN111779887A CN111779887A CN202010673778.4A CN202010673778A CN111779887A CN 111779887 A CN111779887 A CN 111779887A CN 202010673778 A CN202010673778 A CN 202010673778A CN 111779887 A CN111779887 A CN 111779887A
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- hole
- pipeline
- excavating
- tunneling
- excavation
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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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
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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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The application discloses an underground pipeline maintenance method, which comprises the following steps of: excavating around the pipeline in the inspection well, excavating an excavating hole at the periphery of the pipeline, wherein the pipeline is positioned in the excavating hole, the excavating hole is vertical to the inspection well, and the excavating hole is parallel to the pipeline; a supporting step: arranging a plurality of supporting plates in the excavation hole, enclosing supporting rings between the supporting plates, and tightly attaching the outer walls of the supporting rings to the wall of the excavation hole; tunneling: and continuously tunneling along the pipeline, so that the length of the tunneling hole is further increased, a support plate is arranged in the tunneling hole while tunneling, and a support ring surrounded by the support plate is always tightly attached to the hole wall of the tunneling hole. The invention has the following beneficial effects: by adopting the maintenance method of excavating the inlet hole at the inspection well, the road surface does not need to be excavated, collapse does not occur in the excavation process, and the backfilling is carried out after the excavation is finished, so that the probability of subsequent collapse and the probability of pipeline bursting can be greatly reduced.
Description
Technical Field
The invention relates to the technical field of urban construction, in particular to a maintenance method for underground pipelines.
Background
At present, the city construction process all can bury the pipeline underground, then set up an inspection shaft at every certain distance, the space on the ground has been practiced thrift to the mode of burying the pipeline underground, but bury the pipeline underground and have a problem, must carry out the ground excavation maintenance after the pipeline is damaged (common such as after city water supply pipe damage, all can dig the ground road earlier then maintain), and carry out the ground excavation maintenance and then influence the ground traffic huge, the follow-up reconstruction of ground road after the second excavation is very time-consuming.
The inspection well is arranged in the pipeline at intervals, and the valve and the detection instrument on the pipeline are both positioned in the inspection well, so that the pipeline is convenient to control by maintenance personnel.
Disclosure of Invention
The invention provides a method for maintaining underground pipelines, which aims at solving the problems.
The technical scheme adopted by the invention is as follows:
a method for repairing underground pipelines is characterized by comprising the following steps,
s1 (pre-excavation step): excavating around the pipeline in the inspection well, excavating an excavating hole at the periphery of the pipeline, wherein the pipeline is positioned in the excavating hole, the excavating hole is vertical to the inspection well, and the excavating hole is parallel to the pipeline;
firstly, tunneling along a pipeline in an inspection well, and excavating soil near the pipeline to gradually expose the outer wall of the pipeline;
s2 (supporting step): arranging a plurality of supporting plates in the excavation hole, enclosing supporting rings between the supporting plates, and tightly attaching the outer walls of the supporting rings to the wall of the excavation hole;
because the distance required to be excavated is relatively long in the excavation process, if the excavated part is not effectively supported, collapse can occur after excavation, the supporting plates are arranged, and the supporting plates are used for enclosing a supporting ring to support the excavation hole, so that the excavation hole is ensured not to collapse;
s3 (tunneling step): continuing tunneling along the pipeline to further lengthen the length of the tunneling hole, and arranging a support plate in the tunneling hole while tunneling, wherein a support ring surrounded by the support plate is always tightly attached to the hole wall of the tunneling hole;
the supporting plate is arranged every time a distance is excavated, so that the supporting ring is continuously lengthened in the process that the excavation hole is continuously lengthened, so that the excavation and the supporting can be carried out at the same time, the collapse is effectively avoided, and the excavation speed is greatly improved;
s4 (repair step): repairing or replacing the damaged part of the pipeline;
s5 (backfill step): and backfilling the gap between the pipeline and the support ring.
Because the maintenance and the change of the pipeline are completed, a larger gap exists between the pipeline and the support ring, the existence of the gap easily causes the road surface to collapse, and the existence of the gap easily causes the pipeline to burst due to expansion with heat and contraction with cold, so that the gap between the pipeline and the support ring is backfilled after the maintenance is completed, the collapse can be avoided due to the absence of a cavity, and the probability of burst due to expansion with heat and contraction with cold of the pipeline can be reduced. And the existence of the support ring is equivalent to forming a pressure-bearing protection ring for the pipeline, so that the compressive strength of the ground is higher, and the pipeline is not easy to be fractured by a heavy truck.
In conclusion, by adopting the maintenance method for excavating the excavation inlet hole at the inspection well, the road surface does not need to be excavated, collapse does not occur in the excavation process, and the backfilling is carried out after the excavation is finished, so that the probability of collapse and the probability of pipeline burst can be greatly reduced, and the pipeline is not easy to fracture.
Optionally, the digging hole is a circular digging hole, and the support ring is a circular support ring.
The round tunneling hole is not easy to collapse, and the supporting function of the supporting ring is achieved, so that the probability of collapse in the tunneling process can be effectively reduced.
Optionally, the support plate is a semicircular support plate.
Optionally, a nut is arranged on the outer wall of each support plate, the two support plates on the same circular cross section are fixed through bolts, and a gap between every two adjacent support plates is sealed through cement.
The two supporting plates are fixed together to prevent the supporting plates from sliding in the tunneling hole, and the two adjacent supporting plates are sealed by cement, so that sand and soil are prevented from falling into the supporting ring, and underground water is prevented from seeping into the supporting ring.
Optionally, the diameter of the support ring is 2 times of the diameter of the tunneling hole.
The diameter of the support ring is twice the diameter of the excavation hole, which is convenient for workers to move in the support ring during excavation and is convenient for transporting away soil generated during excavation.
Optionally, the gap between the pipeline and the support ring is backfilled by using a mixture of yellow sand and plain soil.
The backfilling effect by utilizing the mixture of the yellow sand and the plain soil is as follows, because the yellow sand has a good heat insulation effect, the influence of the change of the environmental temperature on the pipeline can be reduced, and simultaneously, after the yellow sand and the plain soil are mixed, the whole mixture has better viscosity relative to the yellow sand, large-scale water and soil loss caused by the seepage of underground water can not be easily caused after filling, and the probability of collapse is reduced.
Optionally, the axis of the pipeline coincides with the axis of the support ring.
Optionally, the support plate is a steel support plate.
The invention has the beneficial effects that: by adopting the maintenance method of excavating the inlet hole at the inspection well, the road surface does not need to be excavated, collapse does not occur in the excavation process, and the backfilling is carried out after the excavation is finished, so that the probability of subsequent collapse and the probability of pipeline bursting can be greatly reduced.
Description of the drawings:
FIG. 1 is a schematic block diagram of the structure of a support plate;
fig. 2 is a schematic view of the excavation process.
The figures are numbered: 1. support plate, 101, nut, 2, pipeline, 3, inspection shaft.
The specific implementation mode is as follows:
the present invention is described in detail below.
The present invention will be further described in detail with reference to fig. 1 and 2, taking the tap water supply pipe of DN400 as an example;
referring to fig. 1, the support plate 1 is a semicircular support plate with an inner radius of 400mm, the support plate is provided with a nut 101, the support plate has a length of 300mm, and is made of steel;
referring to fig. 2, the pipe 2 is perpendicular to the manhole 3;
s1: excavating around the pipeline in the inspection well, excavating an excavating hole at the periphery of the pipeline, wherein the pipeline is positioned in the excavating hole, the excavating hole is vertical to the inspection well, and the excavating hole is parallel to the pipeline;
s2: arranging support plates in a driving hole, enclosing a support ring between the support plates, wherein the outer wall of the support ring is tightly attached to the hole wall of the driving hole, the upper support plate and the lower support plate on the same circular section are fixedly connected by bolts, a gap between every two adjacent support plates is sealed by cement, the support plates enclose the support ring, the outer wall of the support ring is tightly attached to the hole wall of the driving hole, and the axial lead of the support ring is superposed with the axial lead of a pipeline;
s3: continuing tunneling along the pipeline to further lengthen the length of the tunneling hole, arranging support plates in the tunneling hole while tunneling, arranging one support plate at intervals of 30cm, and enabling a support ring surrounded by the support plates to be always attached to the wall of the tunneling hole until a damaged part of the pipeline is excavated;
s4: replacing and maintaining the damaged pipeline;
s5: and mixing the yellow sand and the plain soil, and backfilling a gap between the pipeline and the support ring.
According to the method, the maintenance method of excavating the inlet hole at the inspection well is adopted, the road surface does not need to be excavated, collapse does not occur in the excavating process, and the backfilling is carried out after the excavation is finished, so that the probability of collapse and the probability of pipeline burst can be greatly reduced. And the pipe is less susceptible to fracturing.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, which is defined by the claims and their equivalents, and can be directly or indirectly applied to other related fields of technology.
Claims (8)
1. A method for repairing underground pipelines is characterized by comprising the following steps,
pre-excavating: excavating around the pipeline in the inspection well, excavating an excavating hole at the periphery of the pipeline, wherein the pipeline is positioned in the excavating hole, the excavating hole is vertical to the inspection well, and the excavating hole is parallel to the pipeline;
a supporting step: arranging a plurality of supporting plates in the excavation hole, enclosing supporting rings between the supporting plates, and tightly attaching the outer walls of the supporting rings to the wall of the excavation hole;
tunneling: continuing tunneling along the pipeline to further lengthen the length of the tunneling hole, and arranging a support plate in the tunneling hole while tunneling, wherein a support ring surrounded by the support plate is always tightly attached to the hole wall of the tunneling hole;
repairing: repairing or replacing the damaged part of the pipeline;
backfilling: and backfilling the gap between the pipeline and the support ring.
2. A method of servicing an underground pipe as claimed in claim 1 wherein the excavation is a circular excavation and the support collars are circular support collars.
3. A method of servicing an underground pipe as claimed in claim 2, wherein the support plate is a semicircular support plate.
4. A method for repairing an underground pipe as claimed in claim 3, wherein nuts are provided on the outer walls of the supporting plates, two supporting plates on the same circular cross-section are fixed by bolts, and the gap between adjacent supporting plates is sealed by cement.
5. A method of servicing underground pipes according to claim 2 wherein the diameter of the support rings is 2 times the diameter of the tunnelling bore.
6. A method of servicing an underground pipeline according to claim 2, in which the gap between the pipeline and the support ring is backfilled with a mixture of yellow sand and plain soil.
7. A method of servicing an underground pipe as claimed in claim 2, in which the axis of the pipe coincides with the axis of the support ring.
8. A method of servicing underground piping according to claim 2, wherein the support plate is a steel support plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010673778.4A CN111779887A (en) | 2020-07-14 | 2020-07-14 | Underground pipeline maintenance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010673778.4A CN111779887A (en) | 2020-07-14 | 2020-07-14 | Underground pipeline maintenance method |
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| Publication Number | Publication Date |
|---|---|
| CN111779887A true CN111779887A (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010673778.4A Pending CN111779887A (en) | 2020-07-14 | 2020-07-14 | Underground pipeline maintenance method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509589A (en) * | 2009-03-31 | 2009-08-19 | 崔同悦 | Non-digging pipe repairing method |
| CN103979880A (en) * | 2014-05-30 | 2014-08-13 | 济南城建集团有限公司 | Pipeline engineering trench backfill material cement all-in-one mixture and preparation method thereof |
| CN205277460U (en) * | 2015-12-29 | 2016-06-01 | 中国水电建设集团十五工程局有限公司 | Interim strutting arrangement of tunnel excavation |
| CN108590527A (en) * | 2018-04-25 | 2018-09-28 | 邳州中燃城市燃气发展有限公司 | A kind of method of high-pressure gas pipeline no-dig technique Pipeline Crossing by Horizontal Directional Drilling construction |
| CN109930608A (en) * | 2019-03-05 | 2019-06-25 | 云南建投第十二建设有限公司 | A kind of pit earthwork excavation method of peat matter weak soil |
| CN111335898A (en) * | 2020-02-24 | 2020-06-26 | 中铁工程装备集团有限公司 | Trenchless pipeline updating construction system and construction method |
-
2020
- 2020-07-14 CN CN202010673778.4A patent/CN111779887A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509589A (en) * | 2009-03-31 | 2009-08-19 | 崔同悦 | Non-digging pipe repairing method |
| CN103979880A (en) * | 2014-05-30 | 2014-08-13 | 济南城建集团有限公司 | Pipeline engineering trench backfill material cement all-in-one mixture and preparation method thereof |
| CN205277460U (en) * | 2015-12-29 | 2016-06-01 | 中国水电建设集团十五工程局有限公司 | Interim strutting arrangement of tunnel excavation |
| CN108590527A (en) * | 2018-04-25 | 2018-09-28 | 邳州中燃城市燃气发展有限公司 | A kind of method of high-pressure gas pipeline no-dig technique Pipeline Crossing by Horizontal Directional Drilling construction |
| CN109930608A (en) * | 2019-03-05 | 2019-06-25 | 云南建投第十二建设有限公司 | A kind of pit earthwork excavation method of peat matter weak soil |
| CN111335898A (en) * | 2020-02-24 | 2020-06-26 | 中铁工程装备集团有限公司 | Trenchless pipeline updating construction system and construction method |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Liming Inventor after: Guo Xiaoting Inventor after: Wang Yufei Inventor after: Wang Gaoyuan Inventor after: Jiang Zhihua Inventor before: Wang Liming |
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Application publication date: 20201016 |
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