CN1256531C - Construction method for river crossing pipeline - Google PatentsConstruction method for river crossing pipeline Download PDF
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- CN1256531C CN1256531C CN 200410023552 CN200410023552A CN1256531C CN 1256531 C CN1256531 C CN 1256531C CN 200410023552 CN200410023552 CN 200410023552 CN 200410023552 A CN200410023552 A CN 200410023552A CN 1256531 C CN1256531 C CN 1256531C
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 238000007667 floating Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000002965 rope Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000087 stabilizing Effects 0.000 claims description 5
- 241001415961 Gaviidae Species 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 239000003550 marker Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000009417 prefabrication Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000015450 Tilia cordata Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 210000000481 Breast Anatomy 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
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The present invention discloses a construction method for river crossing pipelines, which belongs to the technical field of underwater pipeline laying. The present invention is characterized in that a long-arm monobucket excavator ditches under water on a self-fabricated floating box, and then, both ends of the prefabricated crossing pipeline are plugged. With the characteristic that sealed pipelines can float on water, the pipeline can be drawn by a construction device to drift and cross rivers to a set position. Then, water is injected in the pipeline, the pipeline is sunk in a pipeline ditch, finally, the pipeline is pressed stably, and the pipeline ditch is backfilled. A construction process step comprises construction preparation, measurement and line laying, underwater ditch excavation, pipeline drift and sinking, pipeline stabilization and pipeline ditch backfill. The construction method has been tried in water network areas in the south of the Yangtze River of western gas eastward delivery pipeline construction, the pipelines successfully cross eight 60m to 100m of navigable rivers, and the total width of the pipelines is more than 800m. Construction quality achieves design requirements and national standards, and compared with a construction method for crossing rivers of 'diversion channel excavation, dam enclosure and flow cutting, water pumping, sludge removal, heavy excavation', the present invention has the advantages of shortened construction periods, no influence to normal navigation, safe construction and no pollution and breakage to environment and saves a large amount of funds.
(1) technical field
The present invention relates to the method for construction technical field of tubing under water, particularly is a kind of pipeline river crossing method of construction.
(2) background technique
Pipeline river crossing especially passes through navigable river, is known as " project of primary importance " in the long distance pipeline construction, technical difficulty height not only, and investment is many, and long in time limit, has a big risk.My company adopts " the mud circulation secondary is put the wet top of pipe method " at home first in March, 1970, and the oil transport pipeline of 159 millimeters of long 474 meters, diameter is successfully passed through the bottom, the Yellow River.Adopt first at home again after 2 years " mechanically-propelled, sluicing, curve pass through the secondary pipe jacking method ", the cased pipe road integral body of long 438 meters, 219 millimeters of tubing diameters, 273 millimeters of middle casing diameters, 325 millimeters of outer layer sleeve diameters is passed through the Yellow River, its bosom below the riverbed face 23.47 meters.In June, 1973, adopt first at home again " towards suction formula water conservancy ditching immersed tunnelling method ", will grow 748 meters, the cased pipe road of 426 millimeters of tubing diameters, 630 millimeters of casing diameters successfully is laid under the Yellow River.
Wherein back two pipeline river crossing new technologies were won national science conference award in 1978.Nineteen ninety-five, my company used " barge-loading type seabeach pipeline excavator " (patent No. 95110332.6) of development voluntarily, successfully laid China's article one seabed gas pipeline in Bohai Sea Gulf.Use " Heiden land, beach pipeline pipe dragging method and isolated plant " (patent No. 00129318), " submarine pipeline land prefabricated tube section plunge into the commercial sea transmitter installation " (patent No. 00256422) of development voluntarily in 2000, successfully lay Heiden land, domestic article one beach oil transport pipeline in Bohai Sea Gulf.68 kilometers of calendar year 2001 my company acceptance of the bid pipeline of transferring natural gas from the west to the east engineering the 26th bid sections, 1016 millimeters of pipe diameters, 26.2 millimeters of wall thickness, working pressure 10MPa is positioned at Wuxi, the south of the River, Suzhou dense waterway net region.68 kilometers pipeline trunk lines will pass through surplus 102 in pond, the river 90, and wherein navigable river is 8, and river width is generally about 60～100 meters.Because water surface broad, river flows, the small boat shipping is frequent, can't adopt iceound, cofferdam, the desilting of drawing water, open method of construction such as diversion channel, heavy excavation, also should not adopt above-mentioned " curve pipe jacking method ", " waterpower is dashed and inhaled immersed tunnelling method " and the extra large pipeline construction method in beach.Patent documentation by retrieval, wherein " relevant improvement of laying submarine pipeline " (patent No. 97122627) is to lay submarine pipeline with pipe laying barge, we can't adopt." River dredger " (98250388) also are not suitable for digging under water pipe trench.Above-mentioned prior art all can not solve the construction difficult problem that we face, and can only use for reference some construction experience.
(3) summary of the invention
In view of above-mentioned prior art all can not be used for the pipeline of transferring natural gas from the west to the east engineering in the construction of dense waterway net region river crossing, the south of the River, we are off the beaten track, have the courage to bring forth new ideas, and adopt " ditching under water, floating immersed tube " river crossing method of construction at home first, and succeed.
The present invention is realized by following technical proposals:
The basic technical features of pipeline river crossing method of construction is: adopt long-armed power shovel to carry out ditching under water on the self-control buoyancy tank, crossing pipeline two ends shutoff that will be prefabricated then, utilize the closed conduit can floating on the water characteristic, cross the river in place with the drift of construction equipment traction pipeline, water filling sinks in the pipe trench it in pipeline again, the firm and backfill of last pressure pipe.Its working procedure is: preparation of construction, measure unwrapping wire, ditching under water, float pipe immersed tube, underwater pipeline stabilizing backfill.The technology contents of each operation (or claiming sub-operation) is:
Preparation of construction: comprise pipe prefabrication and flaw detection, anticorrosive coat detects and repairs, pipe end shutoff and installation water inlet, waste pipe.Earth anchor is buried in buoyancy tank haul, water and assembling down, is wire rope.Buoyancy tank on the excavator, and anti-skidding fixing, constitute furrow making dveice under water thus.
Measure unwrapping wire: according to Design Requirement Drawing, remove lime on the both sides, riverbank earlier, insert checkmark field, marker peg, determine pipe trench center line, pipe trench sideline and construction operation band edge boundary line.According to soil property, water velocity, cutting depth etc., determine data such as the pipe trench degree width and the pipe trench gradient, the bottom of trench width is that caliber adds 3～4 meters, the gradient 1: 2～1: 6.
Ditching under water: by the marker of long-armed power shovel, on buoyancy tank, carry out ditching operation under water, and require the pipe trench single forming according to the both sides, riverbank, through measure qualified after again the mobile position continue ditching operation, scrape out until the whole piece pipe trench.On close limit, riverbank, the river silt that digs out directly is placed on the riverbank, far river silt can be placed on the small-sized hopper from the riverbank and transport on the bank.After underwater trench is shaped, dig the land pipe trench that the slope section is put on the both sides, riverbank again.Whole to pipe trench by the diver then towards putting down with high pressure water gun, reach designing requirement.
Float the pipe immersed tube: in the pipe canal digging of river bed, dig out a transmission ditch in prefabricated pipeline section one side, send the straight-through river bank of ditch, make river enter the transmission ditch, its depth of water can be floated pipeline section for about 1 meter.With sideboom tractor pipeline section is put into the transmission ditch, pipeline section is in floating condition, floats with construction equipment traction pipeline section and delivers to the position.In pipeline section, inject clean water with water pump, make prefabricated tube section slowly sink to bottom of trench.
The underwater pipeline stabilizing backfill: immersed tube is in place reach designing requirement after, cooperate by the diver, with buoyancy tank and loop wheel machine shape of a saddle cement briquetting is installed one by one and is pressed on the manned pipeline backfill then.In the pipe ends cofferdam, expose tube head at last, ponding in the pipeline is scanned out, for pipeline connects ready with air compressor and wiper.
Above-mentioned pipeline river crossing method of construction, on probation in the zone, the network of rivers, the south of the River of pipeline of transferring natural gas from the west to the east engineering the 26th bid section, successfully pass through 8 of navigable rivers, more than 800 meter of overall width, construction quality satisfies the requirement of design document and NBS standard.This method of construction and " excavation diversion channel, cofferdam dam, draw water desilting, heavy excavation " river crossing method of construction contrast, shift to an earlier date 60 days durations, 777.2 ten thousand yuan of saving funds, and do not influence normal shipping basically, industrial accident and equipment accident are few in the work progress, local water and soil and ecotope are not caused any pollution and destruction, be subjected to engineering each side and local resident's favorable comment deeply.This method of construction will have good popularizing application prospect when the heavy caliber long distance pipeline passes through middle or small navigable river from now on.
(4) description of drawings
Accompanying drawing 1 is the concise and to the point technology contents block diagram of working procedure flow process of the present invention and each operation.
Accompanying drawing 2 is schematic representation of ditching under water of the present invention.
Embodiment of accompanying drawings:
As shown in Figure 1, working procedure of the present invention is: preparation of construction, measure unwrapping wire, ditching under water, float pipe immersed tube, underwater pipeline stabilizing backfill.The technology contents of each operation is: the preparation of construction operation comprises buoyancy tank on pipe prefabrication and flaw detection, anticorrosive coat detection and repairing, pipe end shutoff, buoyancy tank haul, water and assembling down, the excavator.Measure the unwrapping wire operation comprise insert checkmark field center line and sideline, determine the pipe trench sized data.Ditching operation under water comprises that slope section ditching is put in river bed ditching and measurement, two sides, pipe trench is smooth.Floating immersed tube operation comprise dig send ditch, swing pipe hyposulculus, traction float pipe put in place, manage in the water filling immersed tube.Underwater pipeline stabilizing backfill operation comprise the pouring weight pressure pipe of slinging, backfill, pipe end cofferdam appear, clear away the pipe in ponding.
When the river water surface and ground, riverbank drop were big, transmission trench depth on the bank needn't be dug and can be advanced river, otherwise shoveling amount and backfill amount are too big.Also can be in anhydrous transmission ditch D before the swing pipe hyposulculus uniform several high-pressure gasbags, pass through drop tube segment on air bag, floating in place by water under the construction equipment traction pipeline section under sideboom tractor and situation that the air bag roll-sliding is tied mutually, and be strictly on guard against the destruction anticorrosive coat.
By shown in Figure 2, furrow making dveice comprises buoyancy tank 1, long-armed power shovel 2, wire rope 3 and earth anchor 4 under water.18 meters of excavator 2 brachiums firmly are placed on the buoyancy tank 1.Buoyancy tank 1 is assembled by four 12 * 2.5 * 1.5 meters little buoyancy tank and is one, and load-carrying is more than 70 tons.Totally four of wire rope 3, totally four of earth anchors 4, A is the river, and B is the riverbank, and C is the river bed pipe trench, and D sends ditch on the bank.After excavator 2 scraped out one section pipe trench, buoyancy tank 1 moved forward a position by wire rope 3 tractions and continues ditching.Whether and it is qualified to detect pipe trench at any time, until scraping out the whole piece underwater trench.If two sides, river landform is open, earth anchor 4 also can be substituted by jumboes such as bulldozer or sideboom tractors, is more convenient for adjusting wire rope 3 like this buoyancy tank 1 is shifted forward again and again.
1. pipeline river crossing method of construction is characterized in that working procedure is:
Preparation of construction: comprise pipe prefabrication and flaw detection, anticorrosive coat detects and repairs, pipe end shutoff and installation water inlet, waste pipe, earth anchor (4) is buried in buoyancy tank (1) haul, water and assembling down, is wire rope (3), excavator (2) is gone up buoyancy tank (1) and anti-skidding fixing, constitutes furrow making dveice under water thus;
Measure unwrapping wire: according to Design Requirement Drawing, (B) both sides are spread lime, are inserted checkmark field, marker peg on the riverbank earlier, determine pipe trench center line, pipe trench sideline and construction operation band edge line, according to soil property, water velocity, cutting depth, determine bottom of trench width and pipe trench gradient data, the bottom of trench width is that caliber has added 3～4 meters, the gradient 1: 2～1: 6;
Ditching under water: by the marker of long-armed power shovel (2) according to both sides, riverbank (B), on buoyancy tank (1), carry out ditching operation under water, and require pipe trench (C) single forming, through measure qualified after again the mobile position continue ditching operation, (C) scrapes out until the whole piece pipe trench, dig both sides, riverbank (B) again and put the land pipe trench of slope section, whole to pipe trench (C) by the diver then towards putting down with high pressure water gun, reach designing requirement;
Float the pipe immersed tube: in river bed pipe trench (C) excavation, dig out a transmission ditch (D) in prefabricated pipeline section one side, send the straight-through river bank of ditch (D), river is entered send ditch (D), its depth of water can be floated pipeline section for about 1 meter, with sideboom tractor pipeline section is put into and is sent ditch (D), pipeline section is in floating condition, float with construction equipment traction pipeline section and to deliver to the position, in pipeline section, inject clean water then, make it slowly sink to bottom of trench;
The underwater pipeline stabilizing backfill: immersed tube is in place reach designing requirement after, cooperate by the diver, with buoyancy tank and loop wheel machine shape of a saddle cement briquetting is installed one by one and to be pressed on the manned pipeline, backfill then, at last in the pipe ends cofferdam, expose tube head, ponding scans out in will managing with air compressor and wiper, gets ready for pipeline connects.
2. pipeline river crossing method of construction according to claim 1, it is characterized in that furrow making dveice comprises buoyancy tank (1), long-armed power shovel (2), wire rope (3) and earth anchor (4) under water, 18 meters of excavator (2) brachiums, firmly be placed on the buoyancy tank (1), buoyancy tank (1) is assembled by four 12 * 2.5 * 1.5 meters little buoyancy tank and is one, totally four of wire rope (3), totally four of earth anchors (4), wire rope (3) one ends are earth anchor (4), and the other end is tied on the buoyancy tank (1).
Priority Applications (1)
|Application Number||Priority Date||Filing Date||Title|
|CN 200410023552 CN1256531C (en)||2004-01-30||2004-01-30||Construction method for river crossing pipeline|
Applications Claiming Priority (1)
|Application Number||Priority Date||Filing Date||Title|
|CN 200410023552 CN1256531C (en)||2004-01-30||2004-01-30||Construction method for river crossing pipeline|
|Publication Number||Publication Date|
|CN1558129A CN1558129A (en)||2004-12-29|
|CN1256531C true CN1256531C (en)||2006-05-17|
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|CN 200410023552 Expired - Fee Related CN1256531C (en)||2004-01-30||2004-01-30||Construction method for river crossing pipeline|
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|CN (1)||CN1256531C (en)|
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- 2004-01-30 CN CN 200410023552 patent/CN1256531C/en not_active Expired - Fee Related
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|CF01||Termination of patent right due to non-payment of annual fee|