CN116951171A - Distributed pipeline system - Google Patents
Distributed pipeline system Download PDFInfo
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- CN116951171A CN116951171A CN202310607707.8A CN202310607707A CN116951171A CN 116951171 A CN116951171 A CN 116951171A CN 202310607707 A CN202310607707 A CN 202310607707A CN 116951171 A CN116951171 A CN 116951171A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000010276 construction Methods 0.000 claims abstract description 46
- 238000005452 bending Methods 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims abstract description 8
- 239000010902 straw Substances 0.000 claims abstract description 3
- 238000005553 drilling Methods 0.000 claims description 66
- 238000012360 testing method Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 30
- 239000002689 soil Substances 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 25
- 239000002002 slurry Substances 0.000 claims description 25
- 238000003466 welding Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000440 bentonite Substances 0.000 claims description 10
- 229910000278 bentonite Inorganic materials 0.000 claims description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 10
- 229920001903 high density polyethylene Polymers 0.000 claims description 9
- 239000004700 high-density polyethylene Substances 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000002706 hydrostatic effect Effects 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 7
- 239000003673 groundwater Substances 0.000 description 6
- 239000012943 hotmelt Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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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
-
- 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
Abstract
The invention particularly relates to a distributed pipeline system which comprises a water pipeline, wherein a pipeline end point is connected with a pipeline of a booster pump station, the position of a pipeline corner of more than or equal to 18 degrees is connected by adopting an elbow, flexible bending is laid at the joint, a buttress is arranged outside the flexible bending, a straight pipeline section and an interface which are wrapped in the buttress are wrapped with a layer of glass cloth, two layers of straw ropes are wrapped outside the flexible bending, a layer of glass cloth is wrapped again, the pipeline corner of less than 18 degrees is laid with flexible bending, the distributed pipeline system further comprises a pipeline warning pile, a kilometer pile, a turning point pile and a warning board, the warning pile is arranged at the starting point and the end point of the pipeline and every 50m along the pipeline, the kilometer pile is provided with one turning point pile, each turning point is provided with a ground nail warning board, and a pipe section laid below a hardened road surface is encrypted to every 20 m. The invention provides a distributed pipeline system of a system and a construction method thereof, which provide a feasible technical scheme for integrally propelling rural domestic water source river replacement.
Description
Technical Field
The invention belongs to the field of pipeline development, and particularly relates to a distributed pipeline system.
Background
The method utilizes the guiding and regulating external water to replace part of groundwater, and has important significance for the comprehensive treatment of the super-mining of the groundwater and the improvement of the groundwater environment. For integrally propelling rural domestic water source river water replacement, a set of system distributed pipeline system and a construction method thereof are needed to be provided.
Disclosure of Invention
The present invention is directed to a distributed pipeline system, which solves the above-mentioned problems.
In order to solve the technical problems, the invention provides the following technical scheme:
a distributed pipeline system comprises a water pipeline, a pipeline end point is connected with a pipeline of a booster pump station, and a pipeline corner
The position of more than or equal to 18 degrees adopts elbow connection, flexible bending is laid at the connection position, a buttress is arranged outside the flexible bending, a straight section of a pipeline and an interface which are wrapped in the buttress are wrapped with a layer of glass cloth, two layers of straw ropes are wrapped outside the flexible bending, the glass cloth is wrapped again, the pipeline corner is less than 18 degrees, the flexible bending is laid, the flexible bending pipeline comprises pipeline warning piles, kilometer piles, turning point piles and warning boards, the warning piles are arranged at the starting point and the ending point of the pipeline and every 50m along the pipeline, one kilometer of the kilometer piles is arranged, one turning point pile is arranged at each inflection point, a ground nail warning board is adopted for a pipeline section which is laid below a hardened pavement, and the straight pipe section is encrypted to be arranged every 20 m; the construction method comprises the following steps: preparation before construction, measurement paying-off, working well construction, equipment positioning, guiding drilling, reaming, slurry wall protection, traction pipeline crossing, grouting and ground recovery.
Further, the water conveying pipeline comprises a spheroidal graphite cast iron pipe and an HDPE pipe, and concrete half-package buttresses are additionally arranged at the standard elbow and the horizontal shaping elbow of the spheroidal graphite cast iron pipe so as to ensure the anti-skid stability of the pipeline; the whole section of the inverted siphon is connected by adopting a self-anchored connection mode to increase the anti-skid stability of the pipeline, a whole-package buttress is additionally arranged at a longitudinally downward elbow, a half-package buttress is additionally arranged at a longitudinally upward elbow, a concrete whole-package buttress is arranged at a steel elbow to ensure the anti-skid stability of the pipeline, a concrete half-package buttress is additionally arranged at a standard elbow horizontally by adopting an HDPE pipe to ensure the anti-skid stability of the pipeline, a whole-package buttress is additionally arranged at a longitudinally downward elbow by adopting an HDPE elbow inverted siphon, a half-package buttress is additionally arranged at a longitudinally upward elbow,
the buttress adopts C20 concrete, and the thrust-resistant side of the horizontal buttress is undisturbed soil, buttress and undisturbed soil in close contact, when undisturbed soil is disturbed, the disturbing soil is cleared away, and the vertical downward bending buttress is filled with C20 concrete, and the bending center of the bent pipe is pointed to the reinforcing bar of vertical downward bending buttress connecting bent pipe and buttress, and the central angle of the vertical upward bending buttress bent pipe is not less than 135 degrees by the buttress cladding part.
Further, the method of pilot drilling comprises the steps of: before the drill is started, a probe of a detector is arranged on a guide drill bit, whether a reflected signal of the probe is normal or not is tested, the guide drill bit is drilled into the soil at a horizontal soil entering angle, a guide operator judges deviation between the drilling position and a drilling route pattern according to measured angle, depth and other data of the drill bit in the guide drilling process through feeding and drilling processes until a soil outlet point, adjustment is carried out, and guide data and torsion and jacking force of the drill are recorded.
Further, the reaming method comprises the steps of: according to the on-site geological condition, a scraper type reamer is adopted, and the size of the reamer is 1.2-1.5 times of the paving pipe diameter.
Further, the method for mud wall protection comprises the following steps: stirring drilling fluid into paste in a slurry stirrer, and injecting the paste by using a high-pressure grouting machine during secondary reaming to form a slurry sleeve; and (5) back-reaming and pipe-laying.
Further, the drilling fluid is prepared from the following raw materials in percentage by weight: 4% of bentonite, 0.2% of high molecular polymer, 0.4% of lubricant and the balance of water; adding water, bentonite and polymer into a mixing bin in construction, and fully stirring to form drilling fluid; and then the drilling fluid is conveyed to the drill bit at the bottom of the hole through the hollow drill rod by the drilling fluid pump and is mixed with drill cuttings in the hole to form slurry to flow at the bottom of the hole.
Furthermore, the pipe welding work is arranged when the traction pipeline passes through the horizontal directional drilling machine, so that the parallel operation with the drilling machine construction is achieved, the construction period is shortened, and the long pipe section is welded at one time.
Further, the hydraulic test is carried out after the pipe welding is finished, and the hydraulic test method comprises the following steps: slowly increasing the water pressure in the pipeline to the test pressure and stabilizing the pressure for 30min, wherein if the pressure is reduced, water can be injected to supplement the pressure, but the pressure is not higher than the test pressure; checking whether water leakage and damage occur at the pipeline interface, the fittings and the like; stopping pressure test in time when water leakage and damage occur, checking the reason, taking corresponding measures, then testing the pressure again, stopping water injection and pressure compensation in the main test stage, and stabilizing for 15min; when the pressure drop after 15min does not exceed the allowable pressure drop value, the test pressure is reduced to the working pressure and kept at constant pressure for 30min, if no water leakage phenomenon exists in appearance inspection, the water pressure test is qualified, when the pipeline is boosted, the gas of the pipeline should be removed, in the boosting process, the gauge needle of the spring pressure gauge is found to swing and unstable, and when the boosting is slower, the pressure is boosted after the re-exhaust, and the grading boosting is needed.
Advantageous effects
The invention provides a distributed pipeline system of a system and a construction method thereof, which provide a practical technical scheme for integrally propelling rural domestic water source river replacement, wherein a concrete semi-wrapped buttress is additionally arranged at a nodular cast iron pipe elbow so as to ensure the anti-skid stability of a pipeline; the whole section of the inverted siphon part adopts a self-anchored connection mode to increase the anti-skid stability of the pipeline, a whole-package buttress is additionally arranged at a longitudinal downward elbow, and a half-package buttress is additionally arranged at a longitudinal upward elbow. The steel elbow is provided with a concrete full-package buttress to ensure the anti-skid stability of the pipeline. The HDPE pipe is horizontally provided with a concrete half-package buttress at the standard elbow so as to ensure the anti-skid stability of the pipeline. The full-package buttress is additionally arranged at the elbow position which is vertically downward by adopting the HDPE elbow inverted siphon, the half-package buttress is additionally arranged at the elbow position which is vertically upward, and the buttress adopts C20 concrete. The size of the reamer is 1.2-1.5 times of the paving pipe diameter, so that the smooth flow of slurry can be kept, and the safe and smooth dragging of a pipeline into a hole can be ensured. The basic formula of the drilling fluid in the engineering is as follows: 4% of bentonite, 0.2% of high molecular polymer and 0.4% of lubricant; stirring into paste in a slurry stirrer, and injecting the paste by a high-pressure grouting machine during secondary reaming to form a slurry sleeve; the back-reaming and pipe-laying are carried out, and the mud effect is particularly important; the lack of mud in the hole can cause accidents such as hole collapse, and the like, so that the pilot drilling is disabled and hidden danger is caused for re-drilling. Considering that stratum mud is easy to run off, after the mud runs off, the friction force between a drill rod and a pipeline and the hole wall is increased due to the lack of the mud in the hole, so that the tensile force is increased; therefore, the 'back slurry' is kept in the whole drilling process, and the proportion of drilling fluid is timely adjusted according to the change of geological conditions so as to produce different slurries. The pipe laying drilling machine selected in the engineering is provided with a mixing stirring and pumping system; adding water, bentonite, polymer and the like into a mixing bin in construction, and fully stirring to form drilling fluid; and then the drilling fluid is conveyed to the drill bit at the bottom of the hole through the hollow drill rod by the drilling fluid pump and is mixed with drill cuttings in the hole to form slurry to flow at the bottom of the hole.
Drawings
Fig. 1 is a construction flow chart of an embodiment of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The distributed pipeline system comprises a water pipeline, a pipeline end point is connected with a pipeline of a booster pump station, the position of the pipeline with the corner of more than or equal to 18 degrees is connected by adopting an elbow, flexible bending is laid at the joint, a buttress is arranged outside the flexible bending, a straight section of the pipeline and an interface of the pipeline, which is wrapped in the buttress, are wrapped with one layer of glass cloth, two layers of grass ropes are wrapped outside the pipeline, and one layer of glass cloth is wrapped, the flexible bending is laid at the pipeline corner of <18 degrees, the distributed pipeline system further comprises a pipeline warning pile, a kilometer pile, a turning point pile and a warning board, wherein the warning pile is arranged at the starting point and the end point of the pipeline and every 50m of the pipeline, the kilometer pile is arranged, each turning point is provided with one turning point pile, a pipe section laid below a hardened road surface adopts a ground nail warning board, and the straight pipe section is encrypted to be arranged every 20 m; the construction method comprises the following steps: preparation before construction, measurement paying-off, working well construction, equipment positioning, guiding drilling, reaming, slurry wall protection, traction pipeline crossing, grouting and ground recovery.
In the preferred embodiment, the water pipe comprises a ductile cast iron pipe and an HDPE pipe, and the ductile cast iron pipe is provided with a concrete half-package buttress at the position of a standard elbow and a horizontal shaping elbow so as to ensure the anti-skid stability of the pipe; the whole section of the inverted siphon part adopts a self-anchored connection mode to increase the anti-slip stability of a pipeline, a whole-package buttress is additionally arranged at a longitudinally downward elbow, a half-package buttress is additionally arranged at a longitudinally upward elbow, a concrete whole-package buttress is arranged at a steel elbow to ensure the anti-slip stability of the pipeline, a concrete half-package buttress is additionally arranged at a standard elbow horizontally to ensure the anti-slip stability of the pipeline by adopting an HDPE elbow inverted siphon part, a whole-package buttress is additionally arranged at a longitudinally downward elbow, a half-package buttress is additionally arranged at a longitudinally upward elbow, C20 concrete is additionally arranged at the buttress, the anti-thrust side of the horizontal buttress is original-state soil, the buttress is tightly contacted with original-state soil, when the original-state soil is disturbed, the original-state soil is removed, the original-state soil is filled by the C20 concrete, the vertical downward elbow is connected with the reinforcing steel bars of the elbow, the vertical downward elbow is directed to the bending center of the elbow, and the center angle of the included part of the vertical upward elbow is not smaller than 135 degrees.
In a preferred embodiment, the method of pilot drilling comprises the steps of: before the drill is started, a probe of a detector is arranged on a guide drill bit, whether a reflected signal of the probe is normal or not is tested, the guide drill bit is drilled into the soil at a horizontal soil entering angle, a guide operator judges deviation between the drilling position and a drilling route pattern according to measured angle, depth and other data of the drill bit in the guide drilling process through feeding and drilling processes until a soil outlet point, adjustment is carried out, and guide data and torsion and jacking force of the drill are recorded.
In a preferred embodiment, the reaming method comprises the steps of: according to the on-site geological condition, a scraper type reamer is adopted, and the size of the reamer is 1.2-1.5 times of the paving pipe diameter.
In a preferred embodiment, the method of mud jacking comprises the steps of: stirring drilling fluid into paste in a slurry stirrer, and injecting the paste by using a high-pressure grouting machine during secondary reaming to form a slurry sleeve; and (5) back-reaming and pipe-laying.
In a preferred embodiment, the drilling fluid is prepared from the following raw materials in percentage by weight: 4% of bentonite, 0.2% of high molecular polymer, 0.4% of lubricant and the balance of water; adding water, bentonite and polymer into a mixing bin in construction, and fully stirring to form drilling fluid; and then the drilling fluid is conveyed to the drill bit at the bottom of the hole through the hollow drill rod by the drilling fluid pump and is mixed with drill cuttings in the hole to form slurry to flow at the bottom of the hole.
In a preferred embodiment, the pipe welding work is arranged at the same time of the traction pipeline crossing horizontal directional drilling machine construction, so that the pipe welding work is parallel to the drilling machine construction to shorten the construction period, and the long pipe section is welded at one time.
In a preferred embodiment, the hydraulic test is performed after the pipe is welded, and the hydraulic test method comprises the following steps: slowly increasing the water pressure in the pipeline to the test pressure and stabilizing the pressure for 30min, wherein if the pressure is reduced, water can be injected to supplement the pressure, but the pressure is not higher than the test pressure; checking whether water leakage and damage occur at the pipeline interface, the fittings and the like; stopping pressure test in time when water leakage and damage occur, checking the reason, taking corresponding measures, then testing the pressure again, stopping water injection and pressure compensation in the main test stage, and stabilizing for 15min; when the pressure drop after 15min does not exceed the allowable pressure drop value, the test pressure is reduced to the working pressure and kept at constant pressure for 30min, if no water leakage phenomenon exists in appearance inspection, the water pressure test is qualified, when the pipeline is boosted, the gas of the pipeline should be removed, in the boosting process, the gauge needle of the spring pressure gauge is found to swing and unstable, and when the boosting is slower, the pressure is boosted after the re-exhaust, and the grading boosting is needed.
In a specific embodiment, taking the directional drilling construction of river water replacement engineering projects of rural domestic water sources in the full urban area of Hebei province as an example, the external water is guided and regulated to replace part of the groundwater, and the method has important significance for the comprehensive treatment of the super-mining of the groundwater and the improvement of the groundwater environment. The construction process flow refers to fig. 1, and a specific construction scheme is as follows:
1. preparation for construction
After entering the site, for some areas with disturbing citizens, posting An Min notification to obtain the support and understanding of surrounding residents and merchants on the project;
according to the field characteristics, performing on-site pit detection on the basis of performing geophysical prospecting, communicating with an owner unit, a design unit and a supervision unit in time, and determining a final construction scheme;
the water, electricity and road on site are ready;
the measures of site safety civilized construction, environmental protection and the like already have the starting conditions;
the site constructor is in place, the used machinery is in place, and the normal construction requirement can be met through overhaul and maintenance;
and according to the requirements of owners, after the multi-party construction is started, the construction can be performed.
2. Measuring pay-off
The project department engineering management part is provided with professional measuring staff, and the on-site measuring staff performs relevant handing-over pile work under the guidance of a design unit and performs pile point protection and guiding and measuring.
After measuring personnel make on-site measurement recheck, the plane position of the construction well site is determined, and the owner unit and the supervision unit are informed of checking and accepting, and then the construction well site can be excavated.
Before the construction of the construction well on site, the elevation and the axis must be checked, and after the determination is correct, the machine can be positioned.
3. Working well construction
The planar structure size of the field working well is 2.0m by 5.6m and 2.0m by 6.0m according to the design requirements and the actual requirements of the field.
The well site is subjected to detailed pit detection before excavation, after no underground pipeline is determined, the well site can be excavated, the working well is excavated by adopting machinery, and earthwork is transported out of a construction site in time.
After the working well is excavated, the periphery of the working well is sealed by adopting a hard enclosing baffle, and an alarm mark is arranged on the outer side of the enclosing baffle.
The special person is arranged to carry out on-site civilized construction when the vehicle enters and exits, so that no floating soil and no dust are ensured, the safety distance between the earth piled and abandoned on site and the working well side is not less than 2.5 meters, and the coverage is tight after manual clapping is adopted.
4. Device in place
According to the on-site situation, a proper machine is selected, the machine is transported by a trailer in place, a temporary horse way is arranged under the condition that the on-site is not provided with the trailer for running, and the directional drilling machine is self-placed.
5. Guided drilling and follow-up investigation
Before the drill is started, a probe of the detector is arranged on the pilot drill bit, whether a reflected signal of the probe is normal or not is tested, the pilot drill bit is drilled into the soil at a horizontal soil entering angle, and the pilot drill bit reaches a soil outlet point through feeding and drilling processes. In the guiding drilling process, a guiding person judges the deviation of the drilling position and the drilling route map according to the measured angle, depth and other data of the drill bit, and then adjusts the deviation with a drilling machine operator, and records the guiding data and the torsion and the jacking force of the drilling machine in time.
6. Reaming
A scraper reamer is used according to the geological condition of the site. The size of the reamer is 1.2-1.5 times of the paving pipe diameter, so that the smooth flow of slurry can be kept, and the safe and smooth dragging of a pipeline into a hole can be ensured.
7. Mud guard wall
The basic formula of the drilling fluid in the engineering is as follows: 4% of bentonite, 0.2% of high molecular polymer and 0.4% of lubricant; stirring into paste in a slurry stirrer, and injecting the paste by a high-pressure grouting machine during secondary reaming to form a slurry sleeve; the back-reaming and pipe-laying are carried out, and the mud effect is particularly important; the lack of mud in the hole can cause accidents such as hole collapse, and the like, so that the pilot drilling is disabled and hidden danger is caused for re-drilling. Considering that stratum mud is easy to run off, after the mud runs off, the friction force between a drill rod and a pipeline and the hole wall is increased due to the lack of the mud in the hole, so that the tensile force is increased; therefore, the 'back slurry' is kept in the whole drilling process, and the proportion of drilling fluid is timely adjusted according to the change of geological conditions so as to produce different slurries.
The pipe laying drilling machine selected in the engineering is provided with a mixing stirring and pumping system; adding water, bentonite, polymer and the like into a mixing bin in construction, and fully stirring to form drilling fluid; and then the drilling fluid is conveyed to the drill bit at the bottom of the hole through the hollow drill rod by the drilling fluid pump and is mixed with drill cuttings in the hole to form slurry to flow at the bottom of the hole.
8. Pipe welding
And (3) arranging pipe welding work at the same time of horizontal directional drilling machine construction, so as to realize parallel operation with the drilling machine construction and shorten the construction period. The welding times in the back dragging process are reduced by adopting the disposable welding long pipe section, and the following points should be noted in the pipe welding process:
(1) The PE pipe is cleaned by clean cotton cloth without dirt on the heating surface of the connecting tool before and after hot melting connection.
(2) The heating time and the heating temperature of the hot melt connection should meet the specifications of a hot melt connection tool production factory and a pipe and fitting production factory.
(3) The hot melt connection must be kept cool for a period of time that does not allow the connection to be moved or any external force to be applied to the connection.
(4) Before the pipe is connected, the pipe is fixed on the frame, the milling cutter is taken down, the clamp is closed, the end face of the pipe is milled, when continuous cutting is formed, the clamp is withdrawn, the gap (not more than 3 mm) between the two ends of the pipe is checked, the hot-melt connection surface is required to be cleaned, and the initial surface skin is scraped.
(5) And the two pipe sections are in hot melting butt joint connection, and each pipe section extends out of a certain free length of the fixture, so that the connecting pieces are aligned on the same axis, and the staggered edges are not more than 10% of the wall thickness.
(6) The temperature of the heating plate is suitable (220+/-10 ℃), and when the indicator lamp is on, the indicator lamp is preferably used for 10 minutes, so that the temperature of the whole heating plate is uniform.
(7) The heating plate with proper temperature is arranged on the frame, the clamping apparatus is closed, the pressure of the system is set, after the heat absorption time is reached, the clamping apparatus is quickly opened, the heating plate is taken down, and the collision with the fused end face is avoided.
(8) The clamp is quickly closed and the pressure is regulated to the working pressure at a constant speed within a prescribed time, and at the same time, the cooling time button is pressed. After the cooling time is reached, the cooling time button is pressed again, the pressure is reduced to zero, the clamp is opened, and the welded pipe is taken down.
(9) Before the pipe is detached, the pressure must be reduced to zero, if the welding machine is moved, the hydraulic hose should be detached, and the joint dust-proof work is done.
(10) The qualified weld joint is provided with two flanges, the shape and the size of the two flanges are uniform and consistent on the outer circumference of the tube with the weld joint being turned over, no air holes, bubbles or cracks exist at the root of a gap between the two flanges, when the pipeline is connected, the welding can be carried out on the groove when the construction site conditions allow, the tube orifice is blocked temporarily, the operation is carried out in a strong wind environment, and protective measures or the adjustment of the construction process are adopted.
9. Pipeline hydrostatic test
(1) The hydraulic test is conducted by unified command, the work is clearly divided, special persons are required to be responsible for checking the backs, the piers, the interfaces, the exhaust valves and the like, and the communication signals when the problems are found are clearly required to be clearly defined.
(2) Slowly increasing the water pressure in the pipeline to the test pressure and stabilizing the pressure for 30min, wherein if the pressure is reduced, water can be injected to supplement the pressure, but the pressure is not higher than the test pressure; checking whether water leakage and damage occur at the pipeline interface, the fittings and the like; when water leakage and damage occur, the pressure test should be stopped in time, the reason is found out, and the pressure test is carried out again after corresponding measures are taken.
(3) Main test stage: stopping water injection and pressure supplementing, and stabilizing for 15min; when the pressure drop after 15min does not exceed the allowable pressure drop value listed in table 1, the test pressure is reduced to the working pressure and kept at constant pressure for 30min, and if no water leakage phenomenon exists in the appearance inspection, the pressurized water test is qualified.
TABLE 1 allowable pressure drop (MPa) for hydrostatic testing of pressure pipelines
(4) When the pipeline is pressurized, the gas of the pipeline should be discharged. In the boosting process, the gauge needle of the spring pressure gauge is found to swing and unstable, and when the boosting is slower, the pressure is boosted after the exhaust is re-carried out.
(5) The pressure should be raised in stages, and the back, the piers, the pipe body and the connectors should be checked at each stage, and the pressure is raised continuously when no abnormal phenomenon occurs.
(6) In the hydrostatic test, the person who is forbidden in the vicinity of the back, support, pipe end, etc. should check when the pressure boosting is stopped.
(7) During the hydrostatic test, the defect is strictly forbidden to be repaired; when a defect occurs, a mark should be made, and the repair is performed after pressure relief.
10. Back-towing pipe
After reaming is finished, connecting a back expander to the tail end of the drill rod, connecting a transfer case to take over, carrying out back dragging, finishing the back dragging and paving of the pipeline, removing the back expander and the transfer case, and taking out the rest drill rod, namely finishing the paving work. In the pipe pulling process, welding and detection time needs to be strictly controlled, the time is too long, leakage, deletion and precipitation of mud moisture in holes can be caused, the back drag resistance is increased, the pipe pulling difficulty is increased, an operator needs to pull a pipeline uniformly and stably according to equipment data, and hard dragging is avoided.
11. Pipe head reservation, slurry pit backfill and pavement restoration
After the back-towing pipe laying is completed, the pipe head is reserved on site according to the requirement, the pipe head is cleaned on site and the ground is restored.
Claims (8)
1. The distributed pipeline system is characterized by comprising a water pipeline, wherein a pipeline end point is connected with a pipeline of a booster pump station, the position of a pipeline corner of more than or equal to 18 degrees is connected by adopting an elbow, flexible bending is laid at the joint, a buttress is arranged outside the flexible bending, a straight pipeline section and an interface which are wrapped in the buttress are wrapped with a layer of glass cloth, two layers of straw ropes are wrapped outside the flexible bending, a layer of glass cloth is wrapped again, the pipeline corner of less than 18 degrees is laid with flexible bending, the distributed pipeline system further comprises pipeline warning piles, kilometer piles, turning point piles and warning boards, the warning piles are arranged at the starting point and the end point of the pipeline and every 50m along the pipeline, one turning point pile is arranged for one kilometer of the kilometer pile, a ground nail warning board is arranged for each turning point, a pipeline section laid below a hardened road surface is encrypted to every 20 m; the construction method comprises the following steps: preparation before construction, measurement paying-off, working well construction, equipment positioning, guiding drilling, reaming, slurry wall protection, traction pipeline crossing, grouting and ground recovery.
2. The distributed pipeline system according to claim 1, wherein the water pipeline comprises a ductile cast iron pipe and an HDPE pipe, and concrete semi-wrapped piers are additionally arranged at the standard elbow and the horizontal shaping elbow of the ductile cast iron pipe to ensure the anti-skid stability of the pipeline; the whole section of the inverted siphon part adopts a self-anchored connection mode to increase the anti-slip stability of a pipeline, a whole-package buttress is additionally arranged at a longitudinally downward elbow, a half-package buttress is additionally arranged at a longitudinally upward elbow, a concrete whole-package buttress is arranged at a steel elbow to ensure the anti-slip stability of the pipeline, a concrete half-package buttress is additionally arranged at a standard elbow horizontally to ensure the anti-slip stability of the pipeline by adopting an HDPE elbow inverted siphon part, a whole-package buttress is additionally arranged at a longitudinally downward elbow, a half-package buttress is additionally arranged at a longitudinally upward elbow, C20 concrete is additionally arranged at the buttress, the anti-thrust side of the horizontal buttress is original-state soil, the buttress is tightly contacted with original-state soil, when the original-state soil is disturbed, the original-state soil is removed, the original-state soil is filled by the C20 concrete, the vertical downward elbow is connected with the reinforcing steel bars of the elbow, the vertical downward elbow is directed to the bending center of the elbow, and the center angle of the included part of the vertical upward elbow is not smaller than 135 degrees.
3. A distributed pipeline system according to claim 1, wherein the method of pilot drilling comprises the steps of: before the drill is started, a probe of a detector is arranged on a guide drill bit, whether a reflected signal of the probe is normal or not is tested, the guide drill bit is drilled into the soil at a horizontal soil entering angle, a guide operator judges deviation between the drilling position and a drilling route pattern according to measured angle, depth and other data of the drill bit in the guide drilling process through feeding and drilling processes until a soil outlet point, adjustment is carried out, and guide data and torsion and jacking force of the drill are recorded.
4. A distributed pipeline system according to claim 1, wherein the reaming method comprises the steps of: according to the on-site geological condition, a scraper type reamer is adopted, and the size of the reamer is 1.2-1.5 times of the paving pipe diameter.
5. A distributed pipeline system according to claim 1, wherein the method of mud retaining walls comprises the steps of: stirring drilling fluid into paste in a slurry stirrer, and injecting the paste by using a high-pressure grouting machine during secondary reaming to form a slurry sleeve; and (5) back-reaming and pipe-laying.
6. A distributed pipeline system according to claim 5, wherein the drilling fluid is composed of the following raw materials in weight percent: 4% of bentonite, 0.2% of high molecular polymer, 0.4% of lubricant and the balance of water; adding water, bentonite and polymer into a mixing bin in construction, and fully stirring to form drilling fluid; and then the drilling fluid is conveyed to the drill bit at the bottom of the hole through the hollow drill rod by the drilling fluid pump and is mixed with drill cuttings in the hole to form slurry to flow at the bottom of the hole.
7. A distributed pipeline system according to claim 6 wherein the pipe welding is arranged to run parallel to the rig construction to reduce the period of time while the pull pipeline is being run through the horizontal directional rig construction, with the long pipe sections being welded at once.
8. The distributed pipeline system of claim 7 wherein the hydrostatic test is performed after the pipe is welded, the hydrostatic test method comprising: slowly increasing the water pressure in the pipeline to the test pressure and stabilizing the pressure for 30min, wherein if the pressure is reduced, water can be injected to supplement the pressure, but the pressure is not higher than the test pressure; checking whether water leakage and damage occur at the pipeline interface, the fittings and the like; stopping pressure test in time when water leakage and damage occur, checking the reason, taking corresponding measures, then testing the pressure again, stopping water injection and pressure compensation in the main test stage, and stabilizing for 15min; when the pressure drop after 15min does not exceed the allowable pressure drop value, the test pressure is reduced to the working pressure and kept at constant pressure for 30min, if no water leakage phenomenon exists in appearance inspection, the water pressure test is qualified, when the pipeline is boosted, the gas of the pipeline should be removed, in the boosting process, the gauge needle of the spring pressure gauge is found to swing and unstable, and when the boosting is slower, the pressure is boosted after the re-exhaust, and the grading boosting is needed.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360321A1 (en) * | 1988-09-16 | 1990-03-28 | VISSER & SMIT HANAB B.V. | Process for laying a pipeline through an earth mass |
| SU1728491A1 (en) * | 1990-05-30 | 1992-04-23 | Gej Boris A | Method of sinking vertical shaft |
| CN101457853A (en) * | 2008-11-20 | 2009-06-17 | 江苏广宇建设集团有限公司 | Non-digging tube-pulling construction method |
| CN101705684A (en) * | 2009-11-13 | 2010-05-12 | 中铁大桥局集团第四工程有限公司 | Method for sinking steel protecting canister for drilled pile construction |
| CN103791159A (en) * | 2012-11-02 | 2014-05-14 | 成张佳宁 | Pipe-jacking construction method for small-diameter pipes |
| CN104565684A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Heat reserving belt and manufacturing method and application thereof |
-
2023
- 2023-05-26 CN CN202310607707.8A patent/CN116951171A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360321A1 (en) * | 1988-09-16 | 1990-03-28 | VISSER & SMIT HANAB B.V. | Process for laying a pipeline through an earth mass |
| SU1728491A1 (en) * | 1990-05-30 | 1992-04-23 | Gej Boris A | Method of sinking vertical shaft |
| CN101457853A (en) * | 2008-11-20 | 2009-06-17 | 江苏广宇建设集团有限公司 | Non-digging tube-pulling construction method |
| CN101705684A (en) * | 2009-11-13 | 2010-05-12 | 中铁大桥局集团第四工程有限公司 | Method for sinking steel protecting canister for drilled pile construction |
| CN103791159A (en) * | 2012-11-02 | 2014-05-14 | 成张佳宁 | Pipe-jacking construction method for small-diameter pipes |
| CN104565684A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Heat reserving belt and manufacturing method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 浙江杭海城际铁路有限公司: "《长江大保护工程施工质量控制与实践城镇排水管网工程》", 中国建筑工业出版社, pages: 1362 - 256 * |
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