CN110701384A - Pipe joint reinforcing method during hanging of socket pipe - Google Patents
Pipe joint reinforcing method during hanging of socket pipe Download PDFInfo
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- CN110701384A CN110701384A CN201911064532.0A CN201911064532A CN110701384A CN 110701384 A CN110701384 A CN 110701384A CN 201911064532 A CN201911064532 A CN 201911064532A CN 110701384 A CN110701384 A CN 110701384A
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- pipeline
- steel pipe
- pipe
- suspended
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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
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
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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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
A method of reinforcing a pipe joint while suspending a female pipe, the method comprising the steps of: 1) excavating earthwork; 2) preparing a steel pipe and operating the steel pipe; 3) cleaning the outer wall of the pipeline to be suspended; 4) placing a steel pipe; 5) filling filler between the steel pipe and the pipeline to be suspended; 6) buckling the pipeline to be suspended by using the steel pipe with the hole; 7) welding an upper part and a lower part of steel pipes wrapped on a pipeline to be suspended; 8) grouting the steel pipe through a grouting hole on the perforated steel pipe, so as to fill the gap between the perforated steel pipe and the pipeline to be hung; 9) curing the grouting materials in the steel pipe with the hole and the steel pipe without the hole; 10) and (5) after the maintenance is finished, hanging the pipeline to be hung. The method provided by the invention has the advantages that the pipe joint and the pipeline form a whole by means of the support of the steel pipe, meanwhile, the slurry is filled between the steel pipe and the pipeline, the phenomenon that the pipeline slides in the steel pipe is avoided, and the whole method is compact in steps and easy to construct.
Description
Technical Field
The invention belongs to the technical field of socket type pipe suspension, and particularly relates to a pipe joint reinforcing method in the process of suspending a socket type pipe.
Background
When a foundation pit or a foundation trench is constructed, an underground pipeline often passes through the foundation pit to influence construction, and a steel pipe or a PE pipe with good integrity is generally solved by adopting a suspension mode.
For the spigot-and-socket type interface, the pipe head at the female end has a pipe diameter larger than the pipe diameter of the pipeline, the interface is a pipeline with a large middle and two small sides, and the interface is generally compacted by adopting materials such as rubber rings or asphalt bast fibers.
When the pipeline is suspended, the interface is easy to generate large deformation and leakage due to uneven stress of each hanging point, and even the joint directly falls off. In order to solve the technical problem, the existing construction method comprises the following steps:
the bell and spigot pipeline is changed into a steel pipe or a hot-melt PE pipe and then suspended, or the bell and spigot pipeline is directly changed.
In the two methods, the original pipeline is required to be shut down whether the pipeline is replaced and suspended or changed, and the pipeline cannot convey media after the original pipeline is shut down, so that the operation of property right units and the use of users are influenced.
In addition, the two methods are either pipe replacement suspension or pipe replacement transfer, and a pipeline and a joint are required to be newly arranged during construction, so that the additional cost and the construction time are increased, and the construction efficiency is greatly reduced.
Disclosure of Invention
The invention aims to provide a method for reinforcing a pipe joint when a suspended socket pipe is used fast and does not influence the normal use of an original pipeline.
In order to solve the technical problems, the invention provides the following technical scheme: the pipe joint reinforcing method during hanging of the socket pipe sequentially comprises the following steps:
1) excavating earth to form an excavation line, exposing a joint of a pipeline to be suspended, and reserving an operation space of 100 ~ 500mm below the joint of the pipeline to be suspended;
2) preparing a steel pipe, wherein the length of the steel pipe is 2 ~ 3 times of the length of a joint of a pipeline to be suspended, the wall thickness of the steel pipe is 5mm ~ 10mm, and the pipe diameter of the steel pipe is at least one grade greater than that of the pipeline to be suspended;
3) the steel pipe is operated by the following method: firstly, longitudinally cutting a steel pipe, thereby dividing the steel pipe into an upper part and a lower part which are symmetrical; then, opening holes on half of the steel pipes to form grouting holes;
4) cleaning the outer wall of the pipeline to be suspended by taking the joint of the pipeline to be suspended as a center and cleaning the outer wall of the pipeline to be suspended within the range of 2 ~ 3 times the length of the joint of the pipeline to be suspended;
5) placing the steel pipe, wherein the method comprises the following steps: placing half steel pipes without holes below the joints of the pipelines to be suspended, wrapping the joints of the pipelines to be suspended, and plugging two ends of the joints;
6) filling filler between the steel pipe and the pipeline to be suspended, so that the space between the inner wall of the steel pipe and the outer wall of the pipeline to be suspended is filled;
7) buckling the steel pipe with the hole above the pipeline to be hung, buckling the steel pipe with the hole with the steel pipe not with the hole, and then plugging two ends of the steel pipe with the hole;
8) welding an upper part and a lower part of steel pipes wrapped on a pipeline to be suspended to form a welding seam;
9) grouting the steel pipe through a grouting hole on the perforated steel pipe, so as to fill the gap between the perforated steel pipe and the pipeline to be hung;
10) curing the grouting materials in the steel pipe with the hole and the steel pipe without the hole;
11) and (5) after the maintenance is finished, hanging the pipeline to be hung.
The concrete method in the step 1) comprises the steps of exposing the upper half part of the pipeline to be suspended, completely exposing the pipeline within the pipe diameter length range of 2 ~ 3 times at the position of the pipeline joint to be suspended by taking the pipeline joint as the center, and reserving an operation space of 100 ~ 500mm below the suspended pipeline.
And 5) inserting wood wedges into the two ends of the steel pipe during plugging, so that the distance between the steel pipe and the suspension pipeline is controlled, and the steel pipe and the suspension pipeline are ensured to be overlapped.
And 5) during plugging in the step 5) and the step 7), plugging both ends of the steel pipe by using bast fibers.
And in the step 6), the filler filled between the steel pipe and the pipeline to be suspended is micro-expansion fine stone concrete above C30 level.
And 6) filling concrete mortar between the steel pipe and the pipeline to be suspended in the step 6).
The curing time in step 10) was 7 days.
In step 11), when the pipeline to be suspended is suspended, 1 ~ 2 lifting rings need to be arranged on the steel pipe.
Through the technical scheme, the invention has the beneficial effects that: the method has the advantages of compact steps, simple and convenient construction, easy operation and low requirement on the skill of workers in the whole process; meanwhile, the construction method has low cost and wide material source, and does not need large-scale equipment; in addition, the construction method is stable and reliable, after reinforcement, the pipeline joint to be suspended and the pipeline to be suspended can form a rigid whole, and the problems that the joint is deformed and further the joint is penetrated or damaged and the like due to uneven stress of each suspension point when the bell and spigot pipe joint is suspended are solved; finally, the construction method has high implementation performance, and after the whole steel pipe is cut into two halves, the requirement on the seam flatness is not high, and the common gas cutting on site is used.
Drawings
FIG. 1 is a flow chart of the reinforcement method of the present invention;
FIG. 2 is a schematic view of the joint fixation at the socket joint;
FIG. 3 is view 1-1 of FIG. 2;
fig. 4 is a view 2-2 of fig. 2.
Detailed Description
Example 1, a method for reinforcing a pipe joint 3 when a socket pipe is suspended, as shown in fig. 1 ~ 4, the reinforcing method aims at the suspension of a socket pipeline with the pipe diameter of DN100 ~ DN600, and the reinforcing of the pipe joint 3 when the socket pipe is suspended can be realized without damaging the original pipeline by the method.
The reinforcing method sequentially comprises the following steps:
1) excavating earth to form an excavation line 6, exposing the pipeline joint 3 to be suspended, and reserving an operation space of 100 ~ 500mm below the pipeline joint 3 to be suspended, specifically, exposing the upper half part of the pipeline to be suspended, completely exposing the pipeline within the range of 2 ~ 3 times the pipe diameter of the pipeline to be suspended at the pipeline joint 3 to be suspended by taking the pipeline joint 3 to be suspended as the center, reserving an operation space of 100 ~ 500mm below the pipeline to be suspended, and preferably 300mm, exposing the pipeline, and reserving the operation space, thereby meeting the subsequent construction requirements.
2) A steel pipe 5 is prepared, wherein the length of the steel pipe 5 is 2 ~ 3 times of the pipe diameter of a pipeline to be suspended, the wall thickness of the steel pipe 5 is 5mm ~ 10mm, preferably 8mm, the pipe diameter of the steel pipe 5 is at least one grade greater than that of the pipeline to be suspended, so that the purpose of supporting the suspended pipeline is met, if the pipe diameter of the pipeline to be suspended is DN100, and the inner diameter of the pipeline to be suspended is 114.3 mm, the pipe diameter of the steel pipe 5 is at least DN125, and the inner diameter of the steel pipe 5 is 141.3 mm.
3) The steel pipe 5 is operated by the following method: firstly, longitudinally cutting the steel pipe 5, thereby dividing the steel pipe 5 into two parts which are symmetrical up and down; then, opening holes on the half steel pipes 5 to form grouting holes; grout can be poured into the steel pipe 5 through the grouting holes during construction.
4) The method for cleaning the outer wall of the pipeline to be suspended is characterized in that the outer wall of the pipeline to be suspended is cleaned by taking a pipeline joint 3 to be suspended as a center, wherein the length of the pipeline to be suspended is 2 ~ 3 times that of the pipeline to be suspended within the pipe diameter range of the pipeline to be suspended, the cleaning mode of the outer wall of the pipeline to be suspended is either wiping or blowing, the cleaning of the outer wall of the pipeline to be suspended is unimportant and is essential to avoiding the phenomenon that the suspension pipeline slides in a steel pipe 5, and in the process of an experiment, if the outer wall 4 of the suspension pipeline is not cleaned for construction speed, the phenomenon that the suspension pipeline joint 3 is still easy to bend is found, and the reason is that the outer wall of the suspension pipeline has impurities such as stones and the like, so that the gap between the suspension pipeline and the steel pipe 5 cannot be completely filled with concrete mortar, and the problem that the suspension pipeline slides in.
5) Placing the steel pipe 5 by the following method: and placing the half steel pipe 5 without the hole below the pipeline joint 3 to be suspended, wrapping the pipeline joint 3 to be suspended, and plugging two ends of the steel pipe, wherein the plugging is made of bastose. In this embodiment, before plugging, wood blocks are inserted into both ends of the steel pipe 5, so as to control the distance between the steel pipe 5 and the suspension pipeline and ensure the steel pipe 5 and the suspension pipeline to be overlapped at the center. By ensuring the coincidence of the steel pipe 5 and the center of the suspension pipeline, the stress of the pipeline can be ensured to be uniform in the suspension process, and the stability of the joint 3 is more facilitated. In the embodiment, the distance between the steel pipe 5 and the suspension pipeline can be controlled by inserting the wood block, so that the method is easy to implement, low in cost and capable of greatly improving the construction effect.
The thickness of the wood block here is:
H=（DGN-DXW）/2；
wherein H is the thickness of the wood block;
DGNthe inner diameter of the steel pipe 5;
DXWto suspend the outside diameter of the pipeline.
6) Filling filler between the steel pipe 5 and the pipeline to be suspended, so that the space between the inner wall of the steel pipe 5 and the outer wall 4 of the pipeline to be suspended is filled; in this embodiment, the filler is micro-expansive fine stone concrete 2 of grade C30 or above, and as a variation of this embodiment, the filler is concrete mortar. The micro-expansion fine stone concrete 2 above C30 grade and the concrete mortar are mature prior art.
7) Buckling the steel pipe 5 with the hole above the pipeline to be hung, buckling the steel pipe 5 with the hole, and then plugging two ends of the steel pipe 5 with the hole; the plugging is also carried out by adopting hemp batting. After this step, the two parts of the steel pipe 5 are again overlapped.
8) The upper part and the lower part of the steel pipe 5 which is wrapped on the pipeline to be suspended are welded to form a welding seam 1, so that the upper part and the lower part are integrated. The welding is performed by first spot welding and then full welding.
9) Grouting into the steel pipe 5 through a grouting hole on the steel pipe 5 with holes, thereby filling the gap between the steel pipe 5 with holes and the pipeline to be suspended; in this embodiment, the pouring into the steel pipe 5 through the grouting hole on the bored steel pipe 5 is: micro-expansion fine stone concrete 2 or concrete mortar above C30 level. As with step 6), the micro-expansion fine stone concrete 2 above C30 grade and the concrete mortar are mature prior art
10) Curing the grouting materials in the steel pipe 5 with the hole and the steel pipe 5 without the hole; the curing time was 7 days.
After the maintenance time is reached, the pipe joint 3 needing to be suspended can be completely supported by the steel pipe 5, the gravity borne by the pipe joint 3 is completely in the bearing range of the pipe joint 3, and the deformation of the pipe joint 3 cannot be caused.
Because the control of the maintenance time has a direct influence on whether the steel pipe 5 can be supported at the pipe joint 3, the method also researches the maintenance time when being implemented, and the research result is as follows:
the maintenance time required for the suspended pipeline with a length of 3m was studied, as shown in table 1:
TABLE 1 relationship between curing time and deformation angle of 3m line pipe joint 3
The maintenance time required for the suspended pipeline with a length of 5m was studied, as shown in table 2:
TABLE 2 relationship between curing time and deformation angle of 5m line pipe joint
The maintenance time required for the suspended pipeline with a length of 7m was studied, as shown in table 3:
TABLE 3 relationship between curing time and deformation angle of 7m pipe joint
It can be seen from tables 1, 2 and 3 that when the curing time reaches 7 days, the curing is continued, the change of the deformation angle is small, the change can be ignored, the balance between the time and the deformation angle is integrated, and 7 days are selected as the optimal curing time.
11) And after the maintenance is finished, the pipeline to be suspended is suspended, and when the pipeline to be suspended is suspended, 1 ~ 2 hanging rings are required to be arranged on the steel pipe.
Embodiment 2, this embodiment is different from embodiment 1 in that: the pipe diameter of the pipeline to be suspended is DN125, the inner diameter of the pipeline to be suspended is 141.3 mm, the pipe diameter of the steel pipe is DN 150 at least, and the inner diameter of the steel pipe is 168.3 mm.
Example 3, this example differs from example 1 in that: the pipe diameter of the pipeline to be suspended is DN 300, the inner diameter of the pipeline to be suspended is 323.8 mm, the pipe diameter of the steel pipe is DN 350 at least, and the inner diameter of the steel pipe is 355.6 mm.
Example 4, this example differs from example 1 in that: the pipe diameter of the pipeline to be suspended is DN 500, and the inner diameter of the pipeline to be suspended is 508 mm; the pipe diameter of the steel pipe is DN 550 at least, and the inner diameter of the steel pipe is 558.8 mm.
Example 5, example 1 differs from example 1 in that: the pipe diameter of the pipeline to be suspended is DN 550, and the inner diameter of the pipeline to be suspended is 558.8 mm; the pipe diameter of the steel pipe is DN600 at least, and the inner diameter of the steel pipe is 609.6 mm.
Example 6, example 1 differs from example 1 in that: the pipe diameter of the pipeline to be suspended is DN600, and the inner diameter of the pipeline to be suspended is 609.6 mm; the pipe diameter of the steel pipe is DN 650 at least, and the inner diameter of the steel pipe is 660.4 mm.
Compared with the prior art, the method has the advantages that the construction time is short, the original pipeline does not need to be closed during construction, meanwhile, the pipe joint does not need to be replaced, and the construction efficiency is high. Through simple steps of cutting, welding, grouting, maintenance and the like, unexpected construction efficiency is achieved, time is saved, a good effect is obtained, and the method is worthy of popularization and use.
The method of the invention leads the pipe joint and the pipeline to form a whole by the support of the steel pipe, and leads the connection between the steel pipe and the pipeline to be tighter by filling the slurry between the steel pipe and the pipeline, thereby avoiding the phenomenon that the pipeline slides in the steel pipe.
The invention discloses a pipe joint reinforcing method when a socket pipe is suspended, which can realize the reinforcement of the pipe joint when the socket pipe is suspended, has simple and convenient construction and easy operation, has low requirement on the skill of workers in the whole process, and simultaneously, the pipe joint reinforced by the method is stable and reliable, and pipelines near the joint form a rigid whole after the reinforcement, thereby solving the problems of deformation of the joint, permeation or damage of the joint and the like caused by uneven stress of each suspension point when the socket pipe joint is suspended.
Claims (8)
1. The pipe joint reinforcing method during hanging of the socket pipe is characterized in that: the method sequentially comprises the following steps:
1) excavating earth so as to expose the joint of the pipeline to be suspended, and reserving an operation space of 100 ~ 500mm below the joint of the pipeline to be suspended;
2) preparing a steel pipe, wherein the length of the steel pipe is 2 ~ 3 times of the length of a joint of a pipeline to be suspended, the wall thickness of the steel pipe is 5mm ~ 10mm, and the pipe diameter of the steel pipe is at least one grade greater than that of the pipeline to be suspended;
3) the steel pipe is operated by the following method: firstly, longitudinally cutting a steel pipe, thereby dividing the steel pipe into an upper part and a lower part which are symmetrical; then, opening holes on half of the steel pipes to form grouting holes;
4) cleaning the outer wall of the pipeline to be suspended by taking the joint of the pipeline to be suspended as a center and cleaning the outer wall of the pipeline to be suspended within the range of 2 ~ 3 times the length of the joint of the pipeline to be suspended;
5) placing the steel pipe, wherein the method comprises the following steps: placing half steel pipes without holes below the joints of the pipelines to be suspended, wrapping the joints of the pipelines to be suspended, and plugging two ends of the joints;
6) filling filler between the steel pipe and the pipeline to be suspended, so that the space between the inner wall of the steel pipe and the outer wall of the pipeline to be suspended is filled;
7) buckling the steel pipe with the hole above the pipeline to be hung, buckling the steel pipe with the hole with the steel pipe not with the hole, and then plugging two ends of the steel pipe with the hole;
8) welding an upper part and a lower part of steel pipes wrapped on a pipeline to be suspended;
9) grouting the steel pipe through a grouting hole on the perforated steel pipe, so as to fill the gap between the perforated steel pipe and the pipeline to be hung;
10) curing the grouting materials in the steel pipe with the hole and the steel pipe without the hole;
11) and (5) after the maintenance is finished, hanging the pipeline to be hung.
2. The method for reinforcing a pipe joint when a bell and spigot pipe is hung according to claim 1, wherein the concrete method in the step 1) is that the upper half part of the pipeline to be hung is exposed, the pipeline in the range of 2 ~ 3 times of the pipe diameter length is completely exposed at the position of the pipeline joint to be hung by taking the pipeline joint as the center, and an operation space of 100 ~ 500mm is reserved below the hanging pipeline.
3. The pipe joint reinforcing method when suspending a female pipe according to claim 2, wherein: and 5) inserting wood wedges into the two ends of the steel pipe during plugging, so that the distance between the steel pipe and the suspension pipeline is controlled, and the steel pipe and the suspension pipeline are ensured to be overlapped.
4. The pipe joint reinforcing method when suspending a female pipe according to claim 3, wherein: and 5) during plugging in the step 5) and the step 7), plugging both ends of the steel pipe by using bast fibers.
5. The pipe joint reinforcing method when suspending a female pipe according to claim 4, wherein: and in the step 6), the filler filled between the steel pipe and the pipeline to be suspended is micro-expansion fine stone concrete above C30 level.
6. The pipe joint reinforcing method when suspending a female pipe according to claim 4, wherein: and 6) filling concrete mortar between the steel pipe and the pipeline to be suspended in the step 6).
7. The pipe joint reinforcing method while suspending the female pipe according to any one of claims 1 to 6, wherein: the curing time in step 10) was 7 days.
8. The method for reinforcing a pipe joint when a female pipe is suspended as claimed in claim 7, wherein in the step 11), when the pipeline to be suspended is suspended, 1 ~ 2 lifting rings are required to be arranged on the steel pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911064532.0A CN110701384B (en) | 2019-11-04 | 2019-11-04 | Pipe joint reinforcing method during hanging of socket pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911064532.0A CN110701384B (en) | 2019-11-04 | 2019-11-04 | Pipe joint reinforcing method during hanging of socket pipe |
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| CN110701384A true CN110701384A (en) | 2020-01-17 |
| CN110701384B CN110701384B (en) | 2021-08-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205261019U (en) * | 2015-12-21 | 2016-05-25 | 广州机施建设集团有限公司 | Gas pipeline suspends protection architecture in midair |
| CN206159649U (en) * | 2016-08-18 | 2017-05-10 | 中铁第四勘察设计院集团有限公司 | Pipeline suspends bracket in midair |
| CN206988672U (en) * | 2017-06-15 | 2018-02-09 | 中冶建工集团有限公司 | Ground pump pipe union bracing means and ruggedized construction |
| KR101985768B1 (en) * | 2019-01-25 | 2019-06-04 | 주식회사 동경기술단 | Hanger Equipment For Supporting Underground Distribution Line |
| CN109881679A (en) * | 2019-04-02 | 2019-06-14 | 中铁十二局集团有限公司 | A kind of overhung construction and construction method of deep-foundation pit engineering underground socket joint pipe of concrete |
| CN110388531A (en) * | 2019-08-09 | 2019-10-29 | 深圳市艾达凯防水工程有限公司 | A kind of the reinforcing structure and its reinforcement means of pipeline |
-
2019
- 2019-11-04 CN CN201911064532.0A patent/CN110701384B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205261019U (en) * | 2015-12-21 | 2016-05-25 | 广州机施建设集团有限公司 | Gas pipeline suspends protection architecture in midair |
| CN206159649U (en) * | 2016-08-18 | 2017-05-10 | 中铁第四勘察设计院集团有限公司 | Pipeline suspends bracket in midair |
| CN206988672U (en) * | 2017-06-15 | 2018-02-09 | 中冶建工集团有限公司 | Ground pump pipe union bracing means and ruggedized construction |
| KR101985768B1 (en) * | 2019-01-25 | 2019-06-04 | 주식회사 동경기술단 | Hanger Equipment For Supporting Underground Distribution Line |
| CN109881679A (en) * | 2019-04-02 | 2019-06-14 | 中铁十二局集团有限公司 | A kind of overhung construction and construction method of deep-foundation pit engineering underground socket joint pipe of concrete |
| CN110388531A (en) * | 2019-08-09 | 2019-10-29 | 深圳市艾达凯防水工程有限公司 | A kind of the reinforcing structure and its reinforcement means of pipeline |
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