CN115217415A - Construction method of flange connecting pipeline under non-excavation condition - Google Patents
Construction method of flange connecting pipeline under non-excavation condition Download PDFInfo
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- CN115217415A CN115217415A CN202210251241.8A CN202210251241A CN115217415A CN 115217415 A CN115217415 A CN 115217415A CN 202210251241 A CN202210251241 A CN 202210251241A CN 115217415 A CN115217415 A CN 115217415A
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- protective sleeve
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 238000009412 basement excavation Methods 0.000 title claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 230000001681 protective effect Effects 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 15
- 230000004888 barrier function Effects 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
- E21B7/205—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
- E21B7/30—Enlarging drilled holes, e.g. by counterboring without earth removal
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a construction method of a flange connecting pipeline under a non-excavation condition, which comprises the following steps: determining positions of an operation pit and a traction drilling machine on two sides of a pre-crossing barrier, measuring and setting out, and designing a guide curve; step (2), carrying out construction operation of an operation pit and installation of a traction drilling machine; step (3) determining the inner diameter D of the protective sleeve 2 Then selecting a plurality of inner diameters D 2 The spiral steel pipes are connected end to end and welded into a protective sleeve pipeline; step (4), conducting guide hole construction from the operation pit to the installation position of the traction drilling machine along the guide curve; step (5), constructing a protective sleeve pipeline from the operation pit to the installation position of the traction drilling machine along the guide curve; step (6), construction of crossing pipelines; step (7), connecting one end of the traction head with one end of the through pipeline, and connecting the other end of the traction head with the other end of the through pipelineAnd the traction crossing pipeline passes through the protective sleeve pipeline.
Description
Technical Field
The invention relates to a construction method of a flange connecting pipeline, in particular to a construction method of a flange connecting pipeline under a non-excavation condition.
Background
The non-excavation technology is used for laying, repairing and replacing pipelines by utilizing the rock-soil drilling technology under the condition of not excavating or only excavating a small amount of operation pits, has the advantages of high efficiency, high quality, moderate cost, environmental friendliness, no influence on traffic, no environmental pollution and the like, and has short construction period, low comprehensive cost and good safety compared with an excavation method under many conditions. The method is a main means for urban municipal construction, and is widely applied to the laying of pipelines such as gas, electric power, telecommunication, cable television lines, petroleum, natural gas, heat, drainage and the like under the conditions that roads, railways, buildings, rivers are crossed, downtown areas, historic site protection areas, crop and vegetation protection areas and the like are not allowed or can not be excavated.
The predecessors studied the pipeline construction method under a plurality of non-excavation conditions, xu Haixu studied the application of the non-excavation drilling technology in the water supply pipeline construction, and the outer diameter phi 842mm penetrates through the water surface of the river by about 300 meters in an oriented drilling mode. Pan Jianjun is studied for the splicing technology of PE pipes under non-excavation conditions, but most of these technical solutions are directed at steel pipes, polyethylene pipes, and soil-mixed pipes, and the connection methods are usually welding, hot-melt connection, etc., and it is characterized in that the diameter of the interface between the pipes is the same as the diameter of the pipe body, and when constructing under non-excavation conditions, the pipe-jacking and pipe-pulling methods can be adopted, so that the construction resistance is small, and the interface is not easily damaged.
However, under the condition that the pre-laid pipeline has a requirement on pressure, the pipeline joints are often connected by flanges, so if trenchless construction is performed, the flanges are often damaged in the traction process because the diameters of the flanges of the joints are usually larger than the diameter of the pipe body and the flanges are embedded into soil or rocks when the pipe is pushed or pulled, and the flanges are subjected to great resistance, so that poor sealing and even fracture occur at the flange joints of the pipeline, and medium conveying of the whole pipeline is affected. Therefore, how to realize the construction of the flange connecting pipeline under the trenchless condition becomes a problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to: the invention aims at solving the problems in the prior art, namely the invention discloses a construction method of a flange connecting pipeline under a non-excavation condition.
The technical scheme is as follows: a construction method of a flange connecting pipeline under a non-excavation condition comprises the following steps:
determining the positions of an operation pit and a traction drilling machine on two sides of a pre-crossing barrier, measuring and setting out, and designing a guide curve to ensure that the direction of a connecting line of the operation pit and the traction drilling machine is consistent with the direction of the design trend of a main pipeline;
step (2), construction operation of an operation pit and installation of a traction drilling machine are respectively carried out;
step (3) according to the maximum outer diameter D of the flange plate of the through pipe 1 Determining the inner diameter D of the protective sleeve 2 In which D is 2 ＝(1.5-2)D 1 (ii) a Then selecting a plurality of inner diameters D 2 The spiral steel pipes are connected end to end and welded into a protective sleeve pipeline;
and (4) conducting guide hole construction from the operation pit to the installation position of the traction drilling machine along the guide curve:
when the pilot bit reaches the expected position and the drilling track conforms to the guide curve, stopping drilling, performing 2-4-stage pre-reaming, and finally reaming to the aperture D 3 ＝1.5D 2 ；
And (5) constructing a protection sleeve pipeline from the operation pit to the installation position of the traction drilling machine along the guide curve:
connecting one end of a traction head with one end of a protective sleeve pipeline, sequentially connecting the other end of the traction head with a drill rod and a traction drilling machine, and dragging the protective sleeve pipeline back to form a protective sleeve pipeline from an operation pit to a traction drilling machine installation position;
step (6), construction of crossing pipelines:
the two ends of the crossing pipe are respectively provided with a flange plate, and the adjacent flange plates of the crossing pipe are connected through bolts to form a crossing pipeline, wherein:
a tense steel wire used for axial stress is arranged along the axial direction of the crossing pipe;
and (7) connecting one end of a traction head with one end of a through pipeline, sequentially connecting the other end of the traction head with a drill rod and a traction drilling machine, dragging the through pipeline back, and enabling the traction through pipeline to pass through the protective sleeve pipeline.
Further, the step (1) of designing the guide curve comprises:
(11) Selecting an optimal crossing position according to the survey data, and designing a guide path according to the distance between the operation pit and the traction drilling machine;
(12) And comprehensively considering the soil entry angle, the soil exit angle and the curvature radius, wherein the soil entry angle is not more than 15 degrees, and the soil exit angle is not more than 20 degrees.
Further, in the step (2), the size of the operation pit is 2m × 1.5m × 1.5m.
Further, the guide hole construction in the step (4) comprises the following steps:
and the drilling section is required to be straight, the depth is detected every 6m, the deviation between the hole position and the guide curve is judged according to the detection parameters, and the deviation is adjusted in time so as to ensure that the drilling hole drills according to the trend of the guide curve.
Further, the wire arrangement mode of the steel wire in the step (6) is as follows:
one end of the steel wire is wound and fixed with a bolt head of the through pipe, the other end of the steel wire extends to the adjacent flange along the axial direction of the through pipe, and the other end of the steel wire is wound and fixed with a screw rod at the position and is locked with the steel wire.
Has the advantages that: the invention discloses a construction method of a flange connecting pipeline under a non-excavation condition, which has the following beneficial effects:
through the combination of two technical means of using the steel wire to connect the flange plate and increasing the large-caliber protective sleeve, the problem that the flange joint of the pipeline is poor in sealing and even broken due to the fact that the flange is large in resistance and easy to damage when the flange is pushed or pulled is solved, and construction of the flange connection pipeline under the non-excavation condition is achieved.
Drawings
FIG. 1 is a schematic crossing diagram of a flange connecting pipeline construction method under a non-excavation condition disclosed by the invention
Fig. 2 is a schematic view of a wire connection.
Wherein:
1-operation pit 2-crossing pipe
3-protective sleeve 4-traction head
5-flange 6-drill rod
7-traction drilling machine 8-bolt head
9-screw 10-wire
The specific implementation mode is as follows:
the following describes in detail specific embodiments of the present invention.
As shown in fig. 1-2, a method for constructing a flange connecting pipeline under trenchless conditions comprises the following steps:
determining the positions of an operation pit 1 and a traction drilling machine 7 at two sides of a pre-crossing barrier, measuring and setting out, and designing a guide curve to ensure that the direction of a connecting line of the operation pit 1 and the traction drilling machine 7 is consistent with the direction of the design trend of a main pipeline;
step (2), respectively carrying out construction operation of the operation pit 1 and installation of the traction drilling machine 7;
step (3) according to the maximum outer diameter D of the flange plate 5 of the through pipe 2 1 Determining the inner diameter D of the protective sleeve 3 2 Wherein D is 2 ＝1.8D 1 Then selecting a plurality of inner diameters D 2 The spiral steel pipes are connected end to end and welded into a protective sleeve pipeline; in another embodiment, D 2 ＝1.5-D 1 (ii) a In yet another embodiment, D 2 ＝2D 1 ；
And (4) conducting guide hole construction from the operation pit 1 to the installation position of the traction drilling machine 7 along the guide curve:
when the pilot bit reaches the expected position and the drilling trajectory coincides with the pilot curve, drilling is stopped, and a 3-stage pre-reaming is performed, (in another embodiment, a 2-stage pre-reaming is performed, and in yet another embodiment, a 4-stage pre-reaming is performed) to finally ream to the bore diameter D 3 ＝1.5D 2 ；
And (5) constructing a protection sleeve pipeline from the operation pit 1 to the installation position of the traction drilling machine 7 along the guide curve:
one end of a traction head 4 is connected with one end of a protective sleeve pipeline, the other end of the traction head 4 is sequentially connected with a drill rod 6 and a traction drilling machine 7, and the protective sleeve pipeline is pulled back to form a protective sleeve pipeline from an operation pit 1 to the installation position of the traction drilling machine 7;
step (6), construction of crossing pipelines:
two ends of the crossing pipe 2 are respectively provided with a flange 5, and the adjacent flanges 5 of the crossing pipe 2 are connected through bolts to form a crossing pipeline, wherein:
a steel wire 10 which is tightened and used for bearing force in the axial direction is arranged along the axial direction of the crossing pipe 2;
and (7) connecting one end of a traction head 4 with one end of a through pipeline, sequentially connecting the other end of the traction head 4 with a drill rod 6 and a traction drilling machine 7, dragging the through pipeline back, and drawing the through pipeline to pass through from the inside of a protective sleeve pipeline.
Further, the step (1) of designing the guide curve comprises:
(11) Selecting an optimal crossing position according to the survey data, and designing a guide path according to the distance between the operation pit 1 and the traction drilling machine 7;
(12) And comprehensively considering the soil entry angle, the soil exit angle and the curvature radius, wherein the soil entry angle is not more than 15 degrees, and the soil exit angle is not more than 20 degrees.
Further, in step (2), the size of the operation pit 1 is 2m × 1.5m × 1.5m.
Further, the pilot hole construction in the step (4) comprises:
and (3) ensuring that the drilling section is straight, detecting the depth every 6m, judging the deviation between the hole position and the guide curve according to the detection parameters, and adjusting in time to ensure that the drilling hole drills according to the trend of the guide curve.
Further, the wire arrangement of the steel wire 10 in the step (6) is as follows:
one end of the steel wire 10 is wound and fixed with the bolt head 8 of the crossing pipe 2, then the other end of the steel wire 10 extends to the adjacent flange 5 along the axial direction of the crossing pipe, and then the other end of the steel wire 10 is wound and fixed with the position of the screw 9 at the position and locks the steel wire 10. The steel wire 10 is provided to be stressed first during the traction process, so as to prevent the flange 5 from being directly stressed by the tensile force in the traction direction, thereby protecting the flange 5.
The embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (5)
1. A construction method of a flange connecting pipeline under a non-excavation condition is characterized by comprising the following steps:
determining the positions of an operation pit and a traction drilling machine on two sides of a pre-crossing barrier, measuring and setting out, and designing a guide curve to ensure that the direction of a connecting line of the operation pit and the traction drilling machine is consistent with the direction of the design trend of a main pipeline;
step (2), construction operation of an operation pit and installation of a traction drilling machine are respectively carried out;
step (3) according to the maximum outer diameter D of the flange plate of the through pipe 1 Determining the inner diameter D of the protective sleeve 2 Wherein D is 2 ＝(1.5-2)D 1 (ii) a Then selecting a plurality of inner diameters D 2 The spiral steel pipes are connected end to end and welded into a protective sleeve pipeline;
and (4) conducting guide hole construction from the operation pit to the installation position of the traction drilling machine along the guide curve:
when the pilot bit reaches the expected position and the drilling track conforms to the guide curve, stopping drilling, performing 2-4-stage pre-reaming, and finally reaming to the aperture D 3 ＝1.5D 2 ；
And (5) constructing a protection sleeve pipeline from the operation pit to the installation position of the traction drilling machine along the guide curve:
connecting one end of a traction head with one end of a protective sleeve pipeline, sequentially connecting the other end of the traction head with a drill rod and a traction drilling machine, and dragging the protective sleeve pipeline back to form a protective sleeve pipeline from an operation pit to a traction drilling machine installation position;
step (6), construction of crossing pipelines:
the two ends of the crossing pipe are respectively provided with a flange plate, and the adjacent flange plates of the crossing pipe are connected through bolts to form a crossing pipeline, wherein:
a tensioned steel wire used for axial stress is arranged along the axial direction of the crossing pipe;
and (7) connecting one end of a traction head with one end of a through pipeline, sequentially connecting the other end of the traction head with a drill rod and a traction drilling machine, pulling back the through pipeline, and enabling the traction through pipeline to pass through the protective sleeve pipeline.
2. The method for constructing the flange connecting pipeline under the trenchless condition as claimed in claim 1, wherein the designing of the guide curve in the step (1) comprises:
(11) Selecting an optimal crossing position according to the survey data, and designing a guide path according to the distance between the operation pit and the traction drilling machine;
(12) And comprehensively considering the soil entry angle, the soil exit angle and the curvature radius, wherein the soil entry angle is not more than 15 degrees, and the soil exit angle is not more than 20 degrees.
3. The method for constructing the flange connecting pipeline under the trenchless condition as claimed in claim 1, wherein in the step (2), the size of the operation pit is 2m x 1.5m.
4. The method for constructing the flange connecting pipeline under the trenchless condition as claimed in claim 1, wherein the pilot hole construction in the step (4) comprises:
and the drilling section is required to be straight, the depth is detected every 6m, the deviation between the hole position and the guide curve is judged according to the detection parameters, and the deviation is adjusted in time so as to ensure that the drilling hole drills according to the trend of the guide curve.
5. The method for constructing the flange connecting pipeline under the trenchless condition as claimed in claim 1, wherein the wire arrangement of the steel wire in the step (6) is as follows:
one end of the steel wire is wound and fixed with a bolt head of the through pipe, the other end of the steel wire extends to the adjacent flange along the axial direction of the through pipe, and the other end of the steel wire is wound and fixed with a screw rod at the position and is locked with the steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210251241.8A CN115217415A (en) | 2022-03-15 | 2022-03-15 | Construction method of flange connecting pipeline under non-excavation condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210251241.8A CN115217415A (en) | 2022-03-15 | 2022-03-15 | Construction method of flange connecting pipeline under non-excavation condition |
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| Publication Number | Publication Date |
|---|---|
| CN115217415A true CN115217415A (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210251241.8A Pending CN115217415A (en) | 2022-03-15 | 2022-03-15 | Construction method of flange connecting pipeline under non-excavation condition |
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| Country | Link |
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| CN (1) | CN115217415A (en) |
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- 2022-03-15 CN CN202210251241.8A patent/CN115217415A/en active Pending
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