CN109340453A - A kind of heat supply pipeline construction method - Google Patents
A kind of heat supply pipeline construction method Download PDFInfo
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- CN109340453A CN109340453A CN201811339687.6A CN201811339687A CN109340453A CN 109340453 A CN109340453 A CN 109340453A CN 201811339687 A CN201811339687 A CN 201811339687A CN 109340453 A CN109340453 A CN 109340453A
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to a kind of heat supply pipeline construction methods, comprising the following steps: 1) construction survey；Establish construction control network；Open-cut measurement；Acceptance survey；2) earth excavation；Channel excavation manually picks up bottom by mechanical engagement when digging to away from slot bottom absolute altitude 200-300mm；It is cut the earth within the scope of present situation pipeline surrounding 500mm using artificial；Slope trimming: foundation trench depth is not required to slope when smaller, and neat side slot is dug out with spade vertical cutting along excavation line；3) backfilling of earthwork；4) artificial push pipe；5) pipeline welds；6) closing circulation irrigating.The invention has the advantages that using the method for the present invention can reasonable arrangement construct, shorten the construction period, it is ensured that construction quality, can be used as heat enginnering construction personnel's on-the-spot guidance construction foundation.
Description
Technical field
The present invention relates to one kind to be suitable for 1.6MPa, DN1200 urban heating pipeline construction method below.
Background technique
Urban heating network is the infrastructure of concentrated supply of heating in the city, has become and implements heating energy-saving transformation, promotes section
Energy emission reduction, one of construction saving, the crucial urban infrastructure in environment-friendly type city.It is increasingly mentioned as life of urban resident is horizontal
Height, the requirement to life comfort level also increase accordingly, and the service level of urban heating pipe network directly reflects the ring of city operations
Energy-saving horizontal is protected to modernization level, very important effect is increasingly played in the construction of urban heating pipe network in city-building.
Summary of the invention
In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a kind of heat supply pipeline construction method, reasonable arrangements
Construction, shortens the construction period, it is ensured that construction quality.
To achieve the above object, the invention is realized by the following technical scheme:
A kind of heat supply pipeline construction method, comprising the following steps:
1) construction survey
A delivery receiving stake quantity meets positioning measurement needs, extends at least one control point to adjacent bid section when more bid sections are constructed；
B carries out deadman and the protection of stake position, the safeguard measure for taking concrete strengthening, building well, following closely guardrail of setting up defences；
C position repetition measurements, repetition measurement precision are not less than the measurement accuracy grade of institute's cross-post；
D establishes construction control network
The laying of horizontal control network: tunnel portal, vertical shaft attachment lay control point, and there are two above sides at each control point
To control point, adjacent control points answer phase intercommunication video；Horizontal control network generallys use traverse survey, GPS measurement and triangulation side
Method survey is set；Horizontal angle surveying uses method of direction observation, and range measurement uses electromagnetic distance measurement, and selects and control net required precision
Identical grade；
The measurement of e open-cut
The positioning of e1 middle line: first making backbone starting point, terminal, intermediate point and intersecting point position on ground according to control net,
Service main and branch line point are determined again；
E2 groove defence line: according to centerline excavating sideline；
E3 indicates underground obstacle in construction area, marks in type, caliber, trend, elevation and the construction of pipeline
The positional relationship of line；
E4 is surveyed in time with excavation progress during excavating and is set middle line, slope foot and vertical control point, is prevented from digging and be backbreak partially with slot bottom；
The construction of e5 fit structure surveys set structure middle line in time, sideline, guiding trestle, fixed bracket, East China bracket respectively deform
Seam；Pipeline elevation control line is set in the survey of structure abutment wall memory；
F acceptance survey
F1 pipeline error in point measurement is not more than 50mm；
The vertical error of f2 point pipeline is in ± 30mm；
Between f3 pipeline and neighbouring above-ground structures, other adjacent pipelines, planning road or status road axis
It is not more than 0.7mm when surveying and drawing 1:500~1:2000 figure away from error；
F4 heat supply pipeline completion vertical shaft includes:
Pipeline head, terminal, plane intersecting point, knick point, branch point centre coordinate and elevation；
Elevation is indicated on the vertical changable center coordinate of pipeline elevation and the vertical steel pipe for changing two positions of point or more；
In centre coordinate and pipe trench at the fixed bracket of the pipeline of in-duct installation, at plane corner and cross section variation
The elevation indicated on bottom, trench cover center；
Bottom, cover top surface center elevation, pipeline center and inspection chamber people in inspection chamber, manhole centre coordinate and inspection chamber
The offset distance at hole center；
2) earth excavation
A channel excavation
A1 encounters when having concrete road surface and asphalt concrete pavement, is cut neatly using cutting machine along excavating sideline；
A2 groove defence line is according to design middle line and absolute altitude, the reserved construction width in ditch bottom structure two sides, two sides when trench laying
Reserved construction width is 600~800mm, and the reserved construction width in two sides is 300~500mm when directly buried installation；Pluvial is pre- when constructing
Stay gutter；
When a3 excavates groove in the natural moisture soil of no underground water,
If the sand or gravelly soil tamped, trench depth≤1.00m is then directly excavated；
It is then directly excavated if sub- gravel soil or sandy loam, trench depth≤1.25m；
If clay, trench depth≤1.50m is then directly excavated；
If hard soil, trench depth≤2.00m is then directly excavated；
When trench depth is more than 5m or scene does not have slope condition, corresponding slope support method need to be selected；
A4 mechanical excavation
When digging to away from slot bottom absolute altitude 200-300mm, bottom is manually picked up by mechanical engagement, prevents slot bottom soil disturbed；
The earthwork for excavating foundation trench stops the good soil that backfill needs when place is had ready conditions and stacked；The extra earthwork should be transported once
It walks, secondary digging is avoided to transport；
It should set to foundation trench bright row's gutter, earth excavation should be hoisted excavation by lower, and set sump；
A5 hand excavation
It is cut the earth within the scope of present situation pipeline surrounding 500mm using artificial；
Present situation pipeline parallel spacing is small or crossover sites are cut the earth using artificial；
When present situation structure or pipeline are complicated, machinery is not easy to operation, using hand excavation；
B slope trimming
B1 foundation trench depth is not required to slope when smaller, and neat side slot is dug out with spade vertical cutting along excavation line；
When b2 excavates slope foundation trench, it should be layered and shovel out domatic by the gradient with spade, make a standard every 2.8-3.5m
Slope surface carries out repairing slope；
It is at any time that standard intraocular repairs slope with grade rod when b3 mechanical excavation；
C manually picks up bottom
C1 is levelling according to the clear bottom of substrate absolute altitude bracing wire progress；
180-220mm thickness undisturbed soil is retained when c2 mechanical excavation, hand fit is slightly picked up, and is carried out after excavation formal
Manually pick up bottom；
D check of foundation subsoil
Ground foundation testboring is carried out before d1 check of foundation subsoil, pricker is visited point arrangement and be should be every 5-6m, 1 point of channel layout, 2 points of cell；
D2 ground soil property must not be disturbed and must not also be backbreak, and method processing should be clicked when slot bottom is locally backbreak:
Groove is backbreak when within 1500mm, is backfilling and compacted with original soil, and compactness is not less than 95%；Groove is backbreak
It when 150mm or more, is handled using rendzinas, compactness is not less than 95%；
When slot bottom has underground water or larger water content, designed elevation is backfilled to using prototype gradation sandstone or natural sand；
3) backfilling of earthwork
The backfill of the thoracic cavity a
Along backfill groove, longitudinally every 20~30m setting backfill is layered mark to a1；It is horizontal along groove two sides, symmetrical, return simultaneously
It fills out, two sides height difference is no more than 300mm；
A2 segmentation backfill meets Cha Chu, and when backfill stays step of marking time；Fill slope should dig step, and step width is not less than 1m,
Height is not more than 0.3m；
The thoracic cavity a3 backfills soil compactness >=95%, and compactness should successively check measurement when backfill, and core cutter method or filling can be used
Sand method, experiment is qualified, after report management is checked and accepted in parallel, can spread out layer overlay soil；
Backfill around a4 structures carries out simultaneously with pipeline groove backfill, when inconvenience carries out simultaneously, step is stayed to connect
Raft；
Backfilling of earthwork in b tube top or the above 500mm in structure top
It is paved in b1 tube top or the above 500mm in structure top by manual zoning, uses small machine compaction in layers；
B2 segmentation backfill, meeting Cha Chu should be step-like at marking time, 1~1.2m of step width, height 0.3m；
B3 direct-burried keeps the temperature the laying warning tape continuous along the line of heat distribution pipeline；Warning tape is entirely laid in right above pipeline,
It is 0.3~0.5m away from tube top；
Compactness is 85% ± 2% in b4 tube top or the above 500mm in structure top；
4) artificial push pipe
A push pipe need not excavate ground to be made to dig in the hydraulic jack of the huge thrust in rear of the pipe jacking tunnelling machine of remote control
Pipeline Crossing Program soil layer into machine and followed by reaches on the position being pre-designed, and excavates and occurs in the front of pipe jacking tunnelling machine,
It is mined substance and earth's surface is discharged to by circulative muddy water system pump；After first segment pipe all heads into soil layer, then by
The followed jacking of double section tube, entire jack-in process circulating repetition；
B active well
The support of working pit forms closed framework, and the quadrangle of rectangle working pit adds diagonal brace；
The installation of c equipment
The installation of c1 guide rail: using railway track, on the basis of lay railway sleepers, guide rail be installed；Guide rail is fixed on pillow with railway spike
On wood, controlled in guide rail with pull rod away from 1.5~2m of pull rod spacing between two guide rails；Sleeper section is not less than 150mm*150mm；
The installation of c2 workbench:
Workbench main bearing beam both ends are stretched out outside active well, not less than 1.2m and are put on sleeper；
The length of platform openings is greater than tube coupling length 0.4m or more, and width is greater than tube coupling outer diameter 0.4m or more；
C3 pushes up iron installation:
It pushes up iron and uses steel-casting or fashioned iron welding fabrication, there is enough rigidity, pushing up has needed hanging ring and locking device on iron；
Top iron is placed on pipeline two sides, and pushing up iron center line should be parallel with pipe centerline, symmetrical；
When the iron of replacement top, first using long top iron, number is connected to reduce top iron；
Buffer pad is installed between top iron and nozzle；
D pipeline jacking
When d1 is using hand pick formula push pipe, level of ground water is down to tube bottom or less not less than 0.5m；
D2 jacking program is: installation top iron starts oil pump, after top pick piston stretches out a stroke, closes oil pump, top pick stops
Operation, piston retraction in gap plus top iron, then open oil pump, so in cycles；
In the range of d3 tool pipe starts 5~10m of jacking, tolerance are as follows: within axial location 3mm, 0~3mm of elevation；
When d4 is using driving jacking by hand, tool pipe contacts or after cutting people's soil layer, from top to bottom stage excavation；Allowing to surpass
It in the steady soil of digging when normal jacking, does not backbreak within the scope of the 1350mm of pipe lower part, the more than tube top amount of backbreaking is not more than 15mm；
After d5 push pipe, sealed using asbestos cement, elastic sealing paste or cement mortar；
E correction
E1 shoveling correction method: be suitable for deviation be 10-20mm when；In the amesiality few shoveling of pipe, and it is more in the other side
It cuts the earth, tube coupling is forced to deviate when advancing to the other side；
E2 yoke supporting methods: when using tool pipe, installing corrector loop behind tool pipe in advance, in the left up and down of corrector loop
1 jack is respectively installed on the right side, when finding that pipe end deviation is greater than 20mm, is started corresponding jack and is corrected；
5) pipeline welds
A weld bond group pair
A1 is clean by the greasy dirt within the scope of nozzle 100mm, dirt, iron rust, deburred；With jack swing pipe to circle centering
Method, two pipe gaps lock counterpart with line-up clamp；
Two pipeline longitudinal seams are staggered when a2 counterpart, spacing be greater than 100mm, and should be placed in pipe above the horizon 40 °-
50°；
Inner wall after a3 counterpart is concordant, and unfitness of butt joint is less than or equal to 20% wall thickness and is not more than 2mm；
The thickness of not spot welding at the longitudinal seam of a4 steel pipe, spot welding is close with groove first layer throat thickness and penetrates；
B weld bond welding
The various positions occurred on pipe are welded using cellulose type downward welding rod；
6) closing circulation irrigating
A by the backbone of flushing, branch line water supplying pipe and return pipe in fill water, and eminence discharges air；If examination in pipe
Pressure water does not exhaust, supplementary water injection, until all filling water；
Slightly wash circulation: starting flush water pump carries out dirty water in 8~10 hours pipes and is recycled, forces deposition in pipe
Sand, gravel impurity are moved along water (flow) direction and finally are deposited in decontamination short tube, arrange lightweight suspension impurity along pipe drainage mouth
Enter in pond, is removed by filtering；
B clear water circulation: it is discharged into municipal storm sewer at once after the dirty water termination of pumping after slightly washing, to minimum point water in pipeline
After all emptying, turn off water discharging valve, then injected clear water into water supplying pipe and in return pipe, after water is full in pipe, is then turned on flushing
Water pump, circulation exhausted rapidly the muddy water in pipe after 8~10 hours；
C washing circulation: washing is all to exhaust muddy water after clear water circulation, be then injected into tap water, continue turn on pump
Circulation is deposited on all dirt in pipe all inside decontamination short tube, terminates clean cycle after water quality test is qualified；
D flushing operation method:
First rinse farthest branch pipe, it is qualified after successively by as far as close, rinse whole branch pipes it is qualified after, then rinse main pipe；
Non- end equipment flushing is rinsed together with branch line pipe network, is responsible for online equipment and is rinsed together with when rinsing main pipe；
E cleaning checks, recovery system
E1 cleaning: first opening drain tap, and the tonifying Qi into pipe when draining prevents occurring vacuum in pipe, by water storage in pipe
Whole is discharged into defined urban rainwater or sewage pipe；
E2 is checked: after water empties, all decontamination short tubes being opened, it is clean will to deposit eliminating impurities, and decontamination is eluted with water
Short tube；
E3 recovery system: backscratcher and flushing pipe, valve are removed, and are blocked and all punched, and are removed and are all faced
Shi Jiagu structures.
Compared with prior art, the beneficial effects of the present invention are:
Using the method for the present invention can reasonable arrangement construction, shorten the construction period, it is ensured that construction quality can be used as heat enginnering and apply
The foundation of worker person's on-the-spot guidance construction.
Specific embodiment
The present invention is described in detail below, it should be noted that implementation of the invention embodiment party not limited to the following
Formula.
A kind of heat supply pipeline construction method, comprising the following steps:
1) construction survey
A delivery receiving stake quantity meets positioning measurement needs, extends at least one control point to adjacent bid section when more bid sections are constructed；
B carries out deadman and the protection of stake position, the safeguard measure for taking concrete strengthening, building well, following closely guardrail of setting up defences；
C position repetition measurements, repetition measurement precision are not less than the measurement accuracy grade of institute's cross-post；
D establishes construction control network
The laying of horizontal control network: tunnel portal, vertical shaft attachment lay control point, and there are two above sides at each control point
To control point, adjacent control points answer phase intercommunication video；Horizontal control network generallys use traverse survey, GPS measurement and triangulation side
Method survey is set；Horizontal angle surveying uses method of direction observation, and range measurement uses electromagnetic distance measurement, and selects and control net required precision
Identical grade；
The measurement of e open-cut
The positioning of e1 middle line: first making backbone starting point, terminal, intermediate point and intersecting point position on ground according to control net,
Service main and branch line point are determined again；
E2 groove defence line: according to centerline excavating sideline；
E3 indicates underground obstacle in construction area, marks in type, caliber, trend, elevation and the construction of pipeline
The positional relationship of line；
E4 is surveyed in time with excavation progress during excavating and is set middle line, slope foot and vertical control point, is prevented from digging and be backbreak partially with slot bottom；
The construction of e5 fit structure surveys set structure middle line in time, sideline, guiding trestle, fixed bracket, East China bracket respectively deform
Seam；Pipeline elevation control line is set in the survey of structure abutment wall memory；
F acceptance survey
F1 pipeline error in point measurement is not more than 50mm；
The vertical error of f2 point pipeline is in ± 30mm；
Between f3 pipeline and neighbouring above-ground structures, other adjacent pipelines, planning road or status road axis
It is not more than 0.7mm when surveying and drawing 1:500~1:2000 figure away from error；
F4 heat supply pipeline completion vertical shaft includes:
Pipeline head, terminal, plane intersecting point, knick point, branch point centre coordinate and elevation；
Elevation is indicated on the vertical changable center coordinate of pipeline elevation and the vertical steel pipe for changing two positions of point or more；
In centre coordinate and pipe trench at the fixed bracket of the pipeline of in-duct installation, at plane corner and cross section variation
The elevation indicated on bottom, trench cover center；
Bottom, cover top surface center elevation, pipeline center and inspection chamber people in inspection chamber, manhole centre coordinate and inspection chamber
The offset distance at hole center；
2) earth excavation
A channel excavation
A1 encounters when having concrete road surface and asphalt concrete pavement, is cut neatly using cutting machine along excavating sideline；
A2 groove defence line is according to design middle line and absolute altitude, the reserved construction width in ditch bottom structure two sides, two sides when trench laying
Reserved construction width is 600~800mm, and the reserved construction width in two sides is 300~500mm when directly buried installation；Pluvial is pre- when constructing
Stay gutter；
When a3 excavates groove in the natural moisture soil of no underground water,
If the sand or gravelly soil tamped, trench depth≤1.00m is then directly excavated；
It is then directly excavated if sub- gravel soil or sandy loam, trench depth≤1.25m；
If clay, trench depth≤1.50m is then directly excavated；
If hard soil, trench depth≤2.00m is then directly excavated；
When trench depth is more than 5m or scene does not have slope condition, corresponding slope support method need to be selected；
A4 mechanical excavation
When digging to away from slot bottom absolute altitude 200-300mm, bottom is manually picked up by mechanical engagement, prevents slot bottom soil disturbed；
The earthwork for excavating foundation trench stops the good soil that backfill needs when place is had ready conditions and stacked；The extra earthwork should be transported once
It walks, secondary digging is avoided to transport；
It should set to foundation trench bright row's gutter, earth excavation should be hoisted excavation by lower, and set sump；
A5 hand excavation
It is cut the earth within the scope of present situation pipeline surrounding 500mm using artificial；
Present situation pipeline parallel spacing is small or crossover sites are cut the earth using artificial；
When present situation structure or pipeline are complicated, machinery is not easy to operation, using hand excavation；
B slope trimming
B1 foundation trench depth is not required to slope when smaller, and neat side slot is dug out with spade vertical cutting along excavation line；
When b2 excavates slope foundation trench, it should be layered and shovel out domatic by the gradient with spade, make a standard every 2.8-3.5m
Slope surface carries out repairing slope；
It is at any time that standard intraocular repairs slope with grade rod when b3 mechanical excavation；
C manually picks up bottom
C1 is levelling according to the clear bottom of substrate absolute altitude bracing wire progress；
180-220mm thickness undisturbed soil is retained when c2 mechanical excavation, hand fit is slightly picked up, and is carried out after excavation formal
Manually pick up bottom；
D check of foundation subsoil
Ground foundation testboring is carried out before d1 check of foundation subsoil, pricker is visited point arrangement and be should be every 5-6m, 1 point of channel layout, 2 points of cell；
D2 ground soil property must not be disturbed and must not also be backbreak, and method processing should be clicked when slot bottom is locally backbreak:
Groove is backbreak when within 1500mm, is backfilling and compacted with original soil, and compactness is not less than 95%；Groove is backbreak
It when 150mm or more, is handled using rendzinas, compactness is not less than 95%；
When slot bottom has underground water or larger water content, designed elevation is backfilled to using prototype gradation sandstone or natural sand；
3) backfilling of earthwork
The backfill of the thoracic cavity a
Along backfill groove, longitudinally every 20~30m setting backfill is layered mark to a1；It is horizontal along groove two sides, symmetrical, return simultaneously
It fills out, two sides height difference is no more than 300mm；
A2 segmentation backfill meets Cha Chu, and when backfill stays step of marking time；Fill slope should dig step, and step width is not less than 1m,
Height is not more than 0.3m；
The thoracic cavity a3 backfills soil compactness >=95%, and compactness should successively check measurement when backfill, and core cutter method or filling can be used
Sand method, experiment is qualified, after report management is checked and accepted in parallel, can spread out layer overlay soil；
Backfill around a4 structures carries out simultaneously with pipeline groove backfill, when inconvenience carries out simultaneously, step is stayed to connect
Raft；
Backfilling of earthwork in b tube top or the above 500mm in structure top
It is paved in b1 tube top or the above 500mm in structure top by manual zoning, uses small machine compaction in layers；
B2 segmentation backfill, meeting Cha Chu should be step-like at marking time, 1~1.2m of step width, height 0.3m；
B3 direct-burried keeps the temperature the laying warning tape continuous along the line of heat distribution pipeline；Warning tape is entirely laid in right above pipeline,
It is 0.3~0.5m away from tube top；
Compactness is 85% ± 2% in b4 tube top or the above 500mm in structure top；
4) artificial push pipe
A push pipe need not excavate ground to be made to dig in the hydraulic jack of the huge thrust in rear of the pipe jacking tunnelling machine of remote control
Pipeline Crossing Program soil layer into machine and followed by reaches on the position being pre-designed, and excavates and occurs in the front of pipe jacking tunnelling machine,
It is mined substance and earth's surface is discharged to by circulative muddy water system pump；After first segment pipe all heads into soil layer, then by
The followed jacking of double section tube, entire jack-in process circulating repetition；
B active well
The support of working pit forms closed framework, and the quadrangle of rectangle working pit adds diagonal brace；
The installation of c equipment
The installation of c1 guide rail: using railway track, on the basis of lay railway sleepers, guide rail be installed；Guide rail is fixed on pillow with railway spike
On wood, controlled in guide rail with pull rod away from 1.5~2m of pull rod spacing between two guide rails；Sleeper section is not less than 150mm*150mm；
The installation of c2 workbench:
Workbench main bearing beam both ends are stretched out outside active well, not less than 1.2m and are put on sleeper；
The length of platform openings is greater than tube coupling length 0.4m or more, and width is greater than tube coupling outer diameter 0.4m or more；
C3 pushes up iron installation:
It pushes up iron and uses steel-casting or fashioned iron welding fabrication, there is enough rigidity, pushing up has needed hanging ring and locking device on iron；
Top iron is placed on pipeline two sides, and pushing up iron center line should be parallel with pipe centerline, symmetrical；
When the iron of replacement top, first using long top iron, number is connected to reduce top iron；
Buffer pad is installed between top iron and nozzle；
D pipeline jacking
When d1 is using hand pick formula push pipe, level of ground water is down to tube bottom or less not less than 0.5m；
D2 jacking program is: installation top iron starts oil pump, after top pick piston stretches out a stroke, closes oil pump, top pick stops
Operation, piston retraction in gap plus top iron, then open oil pump, so in cycles；
In the range of d3 tool pipe starts 5~10m of jacking, tolerance are as follows: within axial location 3mm, 0~3mm of elevation；
When d4 is using driving jacking by hand, tool pipe contacts or after cutting people's soil layer, from top to bottom stage excavation；Allowing to surpass
It in the steady soil of digging when normal jacking, does not backbreak within the scope of the 1350mm of pipe lower part, the more than tube top amount of backbreaking is not more than 15mm；
After d5 push pipe, sealed using asbestos cement, elastic sealing paste or cement mortar；
E correction
E1 shoveling correction method: be suitable for deviation be 10-20mm when；In the amesiality few shoveling of pipe, and it is more in the other side
It cuts the earth, tube coupling is forced to deviate when advancing to the other side；
E2 yoke supporting methods: when using tool pipe, installing corrector loop behind tool pipe in advance, in the left up and down of corrector loop
1 jack is respectively installed on the right side, when finding that pipe end deviation is greater than 20mm, is started corresponding jack and is corrected；
5) pipeline welds
A weld bond group pair
A1 is clean by the greasy dirt within the scope of nozzle 100mm, dirt, iron rust, deburred；With jack swing pipe to circle centering
Method, two pipe gaps lock counterpart with line-up clamp；
Two pipeline longitudinal seams are staggered when a2 counterpart, spacing be greater than 100mm, and should be placed in pipe above the horizon 40 °-
50°；
Inner wall after a3 counterpart is concordant, and unfitness of butt joint is less than or equal to 20% wall thickness and is not more than 2mm；
The thickness of not spot welding at the longitudinal seam of a4 steel pipe, spot welding is close with groove first layer throat thickness and penetrates；
B weld bond welding
The various positions occurred on pipe are welded using cellulose type downward welding rod；
6) closing circulation irrigating
A by the backbone of flushing, branch line water supplying pipe and return pipe in fill water, and eminence discharges air；If examination in pipe
Pressure water does not exhaust, supplementary water injection, until all filling water；
Slightly wash circulation: starting flush water pump carries out dirty water in 8~10 hours pipes and is recycled, forces deposition in pipe
Sand, gravel impurity are moved along water (flow) direction and finally are deposited in decontamination short tube, arrange lightweight suspension impurity along pipe drainage mouth
Enter in pond, is removed by filtering；
B clear water circulation: it is discharged into municipal storm sewer at once after the dirty water termination of pumping after slightly washing, to minimum point water in pipeline
After all emptying, turn off water discharging valve, then injected clear water into water supplying pipe and in return pipe, after water is full in pipe, is then turned on flushing
Water pump, circulation exhausted rapidly the muddy water in pipe after 8~10 hours；
C washing circulation: washing is all to exhaust muddy water after clear water circulation, be then injected into tap water, continue turn on pump
Circulation is deposited on all dirt in pipe all inside decontamination short tube, terminates clean cycle after water quality test is qualified；
D flushing operation method:
First rinse farthest branch pipe, it is qualified after successively by as far as close, rinse whole branch pipes it is qualified after, then rinse main pipe；
Non- end equipment flushing is rinsed together with branch line pipe network, is responsible for online equipment and is rinsed together with when rinsing main pipe；
E cleaning checks, recovery system
E1 cleaning: first opening drain tap, and the tonifying Qi into pipe when draining prevents occurring vacuum in pipe, by water storage in pipe
Whole is discharged into defined urban rainwater or sewage pipe；
E2 is checked: after water empties, all decontamination short tubes being opened, it is clean will to deposit eliminating impurities, and decontamination is eluted with water
Short tube；
E3 recovery system: backscratcher and flushing pipe, valve are removed, and are blocked and all punched, and are removed and are all faced
Shi Jiagu structures.
Claims (1)
1. a kind of heat supply pipeline construction method, which comprises the following steps:
1) construction survey
A delivery receiving stake quantity meets positioning measurement needs, extends at least one control point to adjacent bid section when more bid sections are constructed；
B carries out deadman and the protection of stake position, the safeguard measure for taking concrete strengthening, building well, following closely guardrail of setting up defences；
C position repetition measurements, repetition measurement precision are not less than the measurement accuracy grade of institute's cross-post；
D establishes construction control network
The laying of horizontal control network: tunnel portal, vertical shaft attachment lay control point, and there are two above directions to control at each control point
Processed, adjacent control points answer phase intercommunication video；Horizontal control network generallys use traverse survey, GPS measurement and triangulation method and surveys
If；Horizontal angle surveying uses method of direction observation, and range measurement uses electromagnetic distance measurement, and selects identical as control net required precision
Grade；
The measurement of e open-cut
The positioning of e1 middle line: backbone starting point, terminal, intermediate point and intersecting point position are first made on ground according to control net, then fixed
Service main and branch line point；
E2 groove defence line: according to centerline excavating sideline；
E3 indicates underground obstacle in construction area, marks type, caliber, trend, elevation and the middle line of constructing of pipeline
Positional relationship；
E4 is surveyed in time with excavation progress during excavating and is set middle line, slope foot and vertical control point, is prevented from digging and be backbreak partially with slot bottom；
The construction of e5 fit structure is surveyed in time sets structure middle line, sideline, guiding trestle, fixed bracket, each deformation joint of East China bracket；?
The survey of structure abutment wall memory sets pipeline elevation control line；
F acceptance survey
F1 pipeline error in point measurement is not more than 50mm；
The vertical error of f2 point pipeline is in ± 30mm；
The spacing mistake of f3 pipeline and neighbouring above-ground structures, other adjacent pipelines, planning road or status road axis
Difference is not more than 0.7mm when mapping 1:500~1:2000 schemes；
F4 heat supply pipeline completion vertical shaft includes:
Pipeline head, terminal, plane intersecting point, knick point, branch point centre coordinate and elevation；
Elevation is indicated on the vertical changable center coordinate of pipeline elevation and the vertical steel pipe for changing two positions of point or more；
Bottom, pipe in centre coordinate and pipe trench at the fixed bracket of the pipeline of in-duct installation, at plane corner and cross section variation
The elevation indicated on trench cover center；
Bottom, cover top surface center elevation in inspection chamber, manhole centre coordinate and inspection chamber, in pipeline center and inspection chamber manhole
The offset distance of the heart；
2) earth excavation
A channel excavation
A1 encounters when having concrete road surface and asphalt concrete pavement, is cut neatly using cutting machine along excavating sideline；
A2 groove defence line is according to design middle line and absolute altitude, the reserved construction width in ditch bottom structure two sides, and two sides are reserved when trench laying
Construction width is 600~800mm, and the reserved construction width in two sides is 300~500mm when directly buried installation；Reserved row when Pluvial constructs
Waterside ditch；
When a3 excavates groove in the natural moisture soil of no underground water,
If the sand or gravelly soil tamped, trench depth≤1.00m is then directly excavated；
It is then directly excavated if sub- gravel soil or sandy loam, trench depth≤1.25m；
If clay, trench depth≤1.50m is then directly excavated；
If hard soil, trench depth≤2.00m is then directly excavated；
When trench depth is more than 5m or scene does not have slope condition, corresponding slope support method need to be selected；
A4 mechanical excavation
When digging to away from slot bottom absolute altitude 200-300mm, bottom is manually picked up by mechanical engagement, prevents slot bottom soil disturbed；
The earthwork for excavating foundation trench stops the good soil that backfill needs when place is had ready conditions and stacked；The extra earthwork should be transported once,
Secondary digging is avoided to transport；
It should set to foundation trench bright row's gutter, earth excavation should be hoisted excavation by lower, and set sump；
A5 hand excavation
It is cut the earth within the scope of present situation pipeline surrounding 500mm using artificial；
Present situation pipeline parallel spacing is small or crossover sites are cut the earth using artificial；
When present situation structure or pipeline are complicated, machinery is not easy to operation, using hand excavation；
B slope trimming
B1 foundation trench depth is not required to slope when smaller, and neat side slot is dug out with spade vertical cutting along excavation line；
When b2 excavates slope foundation trench, it should be layered and shovel out domatic by the gradient with spade, make a standard slope surface every 2.8-3.5m,
It carries out repairing slope；
It is at any time that standard intraocular repairs slope with grade rod when b3 mechanical excavation；
C manually picks up bottom
C1 is levelling according to the clear bottom of substrate absolute altitude bracing wire progress；
180-220mm thickness undisturbed soil is retained when c2 mechanical excavation, hand fit is slightly picked up, and is carried out after excavation formal artificial
Pick up bottom；
D check of foundation subsoil
Ground foundation testboring is carried out before d1 check of foundation subsoil, pricker is visited point arrangement and be should be every 5-6m, 1 point of channel layout, 2 points of cell；
D2 ground soil property must not be disturbed and must not also be backbreak, and method processing should be clicked when slot bottom is locally backbreak:
Groove is backbreak when within 1500mm, is backfilling and compacted with original soil, and compactness is not less than 95%；Groove is backbreak in 150mm
It when above, is handled using rendzinas, compactness is not less than 95%；
When slot bottom has underground water or larger water content, designed elevation is backfilled to using prototype gradation sandstone or natural sand；
3) backfilling of earthwork
The backfill of the thoracic cavity a
Along backfill groove, longitudinally every 20~30m setting backfill is layered mark to a1；It is horizontal along groove two sides, symmetrical, backfill simultaneously, two
Side height difference is no more than 300mm；
A2 segmentation backfill meets Cha Chu, and when backfill stays step of marking time；Fill slope should dig step, and step width is not less than 1m, height
No more than 0.3m；
The thoracic cavity a3 backfills soil compactness >=95%, and compactness should successively check measurement when backfill, and core cutter method or sand replacement method can be used,
Experiment is qualified, after report management is checked and accepted in parallel, can spread out layer overlay soil；
Backfill around a4 structures carries out simultaneously with pipeline groove backfill, when inconvenience carries out simultaneously, step is stayed to connect raft；
Backfilling of earthwork in b tube top or the above 500mm in structure top
It is paved in b1 tube top or the above 500mm in structure top by manual zoning, uses small machine compaction in layers；
B2 segmentation backfill, meeting Cha Chu should be step-like at marking time, 1~1.2m of step width, height 0.3m；
B3 direct-burried keeps the temperature the laying warning tape continuous along the line of heat distribution pipeline；Warning tape is entirely laid in right above pipeline, away from pipe
Top is 0.3~0.5m；
Compactness is 85% ± 2% in b4 tube top or the above 500mm in structure top；
4) artificial push pipe
A push pipe, which need not excavate ground, makes development machine in the rear hydraulic jack of huge thrust of the pipe jacking tunnelling machine of remote control
And Pipeline Crossing Program soil layer followed by reaches on the position being pre-designed, and excavates and occurs to be dug in the front of pipe jacking tunnelling machine
Pick substance is discharged to earth's surface by circulative muddy water system pump；After first segment pipe all heads into soil layer, then by the second section
Manage followed jacking, entire jack-in process circulating repetition；
B active well
The support of working pit forms closed framework, and the quadrangle of rectangle working pit adds diagonal brace；
The installation of c equipment
The installation of c1 guide rail: using railway track, on the basis of lay railway sleepers, guide rail be installed；Guide rail is fixed on sleeper with railway spike,
It is controlled in guide rail with pull rod away from 1.5~2m of pull rod spacing between two guide rails；Sleeper section is not less than 150mm*150mm；
The installation of c2 workbench:
Workbench main bearing beam both ends are stretched out outside active well, not less than 1.2m and are put on sleeper；
The length of platform openings is greater than tube coupling length 0.4m or more, and width is greater than tube coupling outer diameter 0.4m or more；
C3 pushes up iron installation:
It pushes up iron and uses steel-casting or fashioned iron welding fabrication, there is enough rigidity, pushing up has needed hanging ring and locking device on iron；
Top iron is placed on pipeline two sides, and pushing up iron center line should be parallel with pipe centerline, symmetrical；
When the iron of replacement top, first using long top iron, number is connected to reduce top iron；
Buffer pad is installed between top iron and nozzle；
D pipeline jacking
When d1 is using hand pick formula push pipe, level of ground water is down to tube bottom or less not less than 0.5m；
D2 jacking program is: installation top iron starts oil pump, after top pick piston stretches out a stroke, closes oil pump, top pick stops fortune
Row, piston retraction in gap plus top iron, then open oil pump, so in cycles；
In the range of d3 tool pipe starts 5~10m of jacking, tolerance are as follows: within axial location 3mm, 0~3mm of elevation；
When d4 is using driving jacking by hand, tool pipe contacts or after cutting people's soil layer, from top to bottom stage excavation；Allow to backbreak
It in steady soil when normal jacking, does not backbreak within the scope of the 1350mm of pipe lower part, the more than tube top amount of backbreaking is not more than 15mm；
After d5 push pipe, sealed using asbestos cement, elastic sealing paste or cement mortar；
E correction
E1 shoveling correction method: be suitable for deviation be 10-20mm when；It cutting the earth in the amesiality few shoveling of pipe, and the other side more,
Tube coupling is forced to deviate when advancing to the other side；
E2 yoke supporting methods: when using tool pipe, installing corrector loop behind tool pipe in advance, in each up and down of corrector loop
1 jack is installed, when finding that pipe end deviation is greater than 20mm, corresponding jack is started and is corrected；
5) pipeline welds
A weld bond group pair
A1 is clean by the greasy dirt within the scope of nozzle 100mm, dirt, iron rust, deburred；With jack swing pipe to the side of circle centering
Method, two pipe gaps lock counterpart with line-up clamp；
Two pipeline longitudinal seams are staggered when a2 counterpart, spacing is greater than 100mm, and should be placed in pipe above the horizon 40 ° -50 °；
Inner wall after a3 counterpart is concordant, and unfitness of butt joint is less than or equal to 20% wall thickness and is not more than 2mm；
The thickness of not spot welding at the longitudinal seam of a4 steel pipe, spot welding is close with groove first layer throat thickness and penetrates；
B weld bond welding: the various positions occurred on pipe are welded using cellulose type downward welding rod；
6) closing circulation irrigating
A by the backbone of flushing, branch line water supplying pipe and return pipe in fill water, and eminence discharges air；If pressure testing water in managing
It does not exhaust, supplementary water injection, until all filling water；
Slightly wash circulation: starting flush water pump carries out dirty water in 8~10 hours pipes and is recycled, forces the sand deposited in pipe, gravel
Stone impurity is moved along water (flow) direction and finally is deposited in decontamination short tube, and lightweight suspension impurity is made to be discharged into pond along pipe drainage mouth
In, it is removed by filtering；
B clear water circulation: being discharged into municipal storm sewer at once after the dirty water termination of pumping after slightly washing, whole to minimum point water in pipeline
After emptying, turn off water discharging valve, then injected clear water into water supplying pipe and in return pipe, after managing interior water completely, be then turned on flush water pump,
Circulation exhausted rapidly the muddy water in pipe after 8~10 hours；
C washing circulation: washing is all to exhaust muddy water after clear water circulation, be then injected into tap water, continues turn on pump circulation,
It is deposited on all dirt in pipe all inside decontamination short tube, terminates clean cycle after water quality test is qualified；
D flushing operation method:
First rinse farthest branch pipe, it is qualified after successively by as far as close, rinse whole branch pipes it is qualified after, then rinse main pipe；End
Equipment flushing is rinsed together with branch line pipe network, is responsible for online equipment and is rinsed together with when rinsing main pipe；
E cleaning checks, recovery system
E1 cleaning: first opening drain tap, and the tonifying Qi into pipe when draining prevents occurring vacuum in pipe, and water storage in pipe is whole
In urban rainwater as defined in being discharged into or sewage pipe；
E2 is checked: after water empties, all decontamination short tubes being opened, it is clean will to deposit eliminating impurities, and decontamination short tube is eluted with water；
E3 recovery system: backscratcher and flushing pipe, valve are removed, and are blocked and all punched, and all interim add is removed
Gu structures.
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| CN110306616A (en) * | 2019-08-02 | 2019-10-08 | 中交上海航道局有限公司 | A kind of construction method of sewage conduct |
| CN110593375A (en) * | 2019-08-29 | 2019-12-20 | 上海景铭建设发展有限公司 | Pipe burying construction method for pipeline by adopting digging groove |
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| CN110306616A (en) * | 2019-08-02 | 2019-10-08 | 中交上海航道局有限公司 | A kind of construction method of sewage conduct |
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| CN110778788A (en) * | 2019-11-13 | 2020-02-11 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Protection method for laying heat supply pipeline after shallow earth covering under road surface |
| CN111963766A (en) * | 2020-08-06 | 2020-11-20 | 北京中海盈石油设备工程技术有限公司 | Process for replacing composite pipeline of gas station |
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Application publication date: 20190215 |