Submarine pipeline is method of construction and device fixedly
(1) technical field
The present invention relates to and the supporting structure thing is dropped to the seabed and be fixed, particularly is fixedly method of construction and device of submarine pipeline.
(2) background technique
The Shengli Oil Field neritic area is because particularity, ocean current and the artificial structure's etc. of sea situation influence makes submarine pipeline unsettled section phenomenon occur with the standpipe joint near platform.Exposed unsettled section of submarine pipeline swings back and forth under the washing away of ocean current, wave.When its local location surpassed fatigue limit, pipeline just might rupture, and oil accident takes place, and caused heavy losses and seawater pollution.This problem must solve as early as possible.Through patent searching document and relevant scientific and technological data, do not find the patented technology and the effective measures that address this problem.
(3) summary of the invention
Purpose of the present invention just is to provide a kind of submarine pipeline fixedly method of construction and device, solves the fixation problem of unsettled section of submarine pipeline effectively, prevents to rupture because of swinging repeatedly, guarantees the operation of submarine pipeline long-term safety.
Above-mentioned purpose is to be realized by following technical proposals:
The process flow of this method of construction is: be prefabricated in the factory into earlier the submarine pipeline fixing device; At sea carry out simultaneously and reconnoitre location and sonar buoy demarcation under water.Fixing device is on-the-spot by the sea assembles with the stake pipe, and the integral installation shipping is delivered to the position.With the crane barge machine on the construction boats and ships pile driver, fixing device and stake pipe etc. are sling then, made a pipe enter centralizing bracket.Utilize sonar equipment to search out unsettled pipeline section again, and the guiding centralizing bracket is accurately in place.Utilize pile driver that the stake pipe is squeezed into the sea bed certain depth, fixing device is put in place; Meanwhile, control and adjustment centralizing bracket keep level, for stake pipe guiding, prevent from.At last, fix unsettled section of submarine pipeline by the U-shaped clamp of fixing device.
The isolated plant of this method of construction mainly contains: hydraulic vibration pile driver, stake pipe centralizing bracket, submarine pipeline fixing device, fixing stake pipe, electric travelling crane, hanging beam, construction boats and ships, crane barge machine, power unit, control unit, umbilical cables, and underwater hydraulic bag, underwater electronic bag, tilting level and sonar equipment.Wherein crane barge machine, power unit and control unit all place on the construction boats and ships.Hanging beam, electric travelling crane, hydraulic vibration pile driver, pipeline fixing device and fixing stake pipe are all played by the crane barge machine.Play hanger on four angles of stake pipe centralizing bracket of four lifting ropes is arranged below the hanging beam.One end of umbilical cables is connecting the control unit on the boats and ships of constructing, and the other end is connecting underwater hydraulic bag, underwater electronic bag, tilting level and the sonar equipment that is installed on the centralizing bracket.
Centralizing bracket in the above-mentioned isolated plant is made up of base, hanger, connecting flange, horizontal adjustemt oil cylinder, framework, clamping oil cylinder, link press span, oil cylinder fixed base, holding frame, roller and sonar.Respectively there are a hanger and one group of connecting flange in four angles, base top.The horizontal adjustemt oil cylinder piston vertically is installed above the upper flange plate.The cylinder sleeve of four oil cylinders is vertically mounted on four angles, framework bottom.The jacket water safety of four clamping oil cylinders is contained on the link press span, and link press span is installed on the holding frame.The piston of clamping oil cylinder is installed on the oil cylinder fixed base.Four groups of eight rollers are installed on the link press span.Sonar has four, is installed in the inside of four frames of base respectively.
Submarine pipeline fixing device in the above-mentioned isolated plant is made up of U-shaped clamp, cantilever beams, stake pipe, cutting ferrule body, locking nut, revolution support, attachment bolt, adjustment plate, attachment pegs, jack and adjustment spanner thereof, supporting baseplate.The U-shaped clamp clamps submarine pipeline for unsettled section, and the clamp two ends are fixed to above the cantilever beams with screw bolt and nut.Cantilever beams is welded on the cutting ferrule body.The cutting ferrule body is sleeved on a tube outside, and is locked on the pipe with locking nut.Revolution is supported and also is enclosed within the fixing stake tube outside, and places cutting ferrule body bottom.Adjustment plate, jack, supporting baseplate place fixing stake pipe inside from top to bottom successively.The fixing stake pipe is squeezed into sea bed by pile driver.
After technique scheme is implemented, the fixing device of stake on the pipe that is driven into sea bed can be fixed unsettled section pressure of submarine pipeline, can prevent from effectively to swing repeatedly because of ocean current, alluvion, no longer because of the tired pipeline fracture accident that takes place, guarantee the operation of submarine pipeline long-term safety, its economic benefit and social benefit are conspicuous.
(4) description of drawings
Accompanying drawing 1 is a method of construction process flow chart of the present invention.
Accompanying drawing 2 is that isolated plant of the present invention is being used view.
Accompanying drawing 3 is that stake pipe centralizing bracket master of the present invention looks schematic representation.
Accompanying drawing 4 is that the A of Fig. 3 is to schematic side view.
Accompanying drawing 5 is that the B of Fig. 3 is to schematic top plan view.
Accompanying drawing 6 is pipeline fixing device of the present invention and stake pipe overall structure schematic representation.
In the accompanying drawing 2, the 1st, hanging beam, the 2nd, hydraulic vibration pile driver, the 3rd, stake pipe centralizing bracket, the 4th, fixing stake pipe, the 5th, electric travelling crane, the 6th, submarine pipeline fixing device, the 7th, umbilical cables, the 8th, control unit, the 9th, construction boats and ships, the 10th, power unit, the 11st, crane barge machine.
3.1 is bases in the accompanying drawing 3,4,5, the 3.2nd, and hanger, the 3.3rd, connecting flange, the 3.4th, the horizontal adjustemt oil cylinder, the 3.5th, framework, the 3.6th, the clamping oil cylinder, the 3.7th, link press span, the 3.8th, by cylinder fixed base, the 3.9th, holding frame, the 3.10th, roller, the 3.11st, sonar.
In the accompanying drawing 6, the 6.1st, U-shaped clamp, the 6.2nd, cantilever beams, the 6.3rd, attachment bolt, the 4th, fixing stake pipe, 6.5 be the cutting ferrule body, the 6.6th, locking nut, the 6.7th, revolution is supported, and the 6.8th, adjust plate, 6.9 be attachment pegs, the 6.10th, jack, the 6.11st, jack is adjusted spanner, the 6.12nd, supporting baseplate.
(5) embodiment
As shown in Figure 1, 2, method of construction process flow of the present invention is: beat before the fixing stake pipe 4, offshore construction preparatory work and fixing device prefabrication are carried out simultaneously, carry out on the one hand that the sea is reconnoitred under water, location and sonar buoy demarcate, on the other hand fixing device 6 ropings are assembled with fixing stake pipe 4 to the scene, beach, the integral installation shipping is delivered to the position again.Crane barge machine 11 on quilts such as pile driver 2, fixing device 6, the fixing stake pipe 4 construction boats and ships 9 is together sling, and makes fixing stake pipe 4 enter the center of centralizing bracket 3.Utilize the sonar equipment 3.11 on the centralizing bracket 3 to search out unsettled pipeline section, and guiding centralizing bracket 3 is accurately in place.With pile driver 2 fixing stake pipe 4 is squeezed into sea bed then, and fixing device 6 is put in place; Meanwhile, control and adjustment centralizing bracket 3 are fixing stake pipe 4 guiding while driving piles, and prevent that fixing stake pipe 4 from tilting.With U-shaped clamp 6.1 submarine pipeline is fixed on the fixing device 6 for unsettled section at last.
Isolated plant of the present invention scene is with state as shown in Figure 2.Crane barge machine 11 wherein, power unit 10 and control unit 8 all place on the construction boats and ships 9.Hanging beam 1, electric travelling crane 5, hydraulic vibration pile driver 2, pipeline fixing device 6 and fixing stake pipe 4 are all played by crane barge 11.Play hanger 3.2 on four angles of stake pipe centralizing bracket 3 of four lifting ropes is arranged below the hanging beam 1.One end of umbilical cables 7 is connecting the control unit 8 on the boats and ships 9 of constructing, and the other end is connecting underwater hydraulic bag, underwater electronic bag, tilting level and the sonar equipment 3.11 that is installed on the centralizing bracket 3.
On-site construction operations process of the present invention is shown in accompanying drawing 2~6:
1. preparation of construction
Carry out preliminry basic research under water by the diver, make a mark with the point location sonar buoy.On construction boats and ships 9, clamp the upper end portion of fixing stake pipe 4, and adjust the central position with the hydraulic fixture of pile driver 2.Put into the holding frame 3.9 of centralizing bracket 3 vertically downward to guarantee lifting back pile driver 2 and fixing stake pipe 4, clamping oil cylinder 3.6 is clamped the underpart of fixing stake pipe 4, adjust centralizing bracket 3 sling lengths, guarantee that lifting back pile driver 2, fixing stake pipe 4, centralizing bracket 3 are whole vertical with the sea level.
2. seek pipe, in place
Position mark according to explored submarine pipeline fixing stake pipe 4, pile driver 2 and centralizing bracket 3 are slowly put into water, under the guiding of the point location sonar (or diver) on the centralizing bracket 3, pile driver 2, fixing stake pipe 4 and centralizing bracket 3 are put on the position that is about to piling.After centralizing bracket 3 arrived seabeds, the section of the submarine pipeline that shows according to section sonar was measured the distance between centralizing bracket 3 centers and the submarine pipeline, adjusts the distance that centralizing bracket 3 reaches technical requirement by crane barge machine 11 and strand mill then.Controlling level is adjusted oil cylinder 3.4, by the level of trim and heel sensor monitors centralizing bracket 3, thus the perpendicularity on assurance fixing stake pipe 4 and sea level.The gps satellite positioning antenna is placed into the central position of pile driver 2, and the gps system received signal is demarcated, the geodetic coordinates of record fixing stake pipe 4, and the preservation data is standby.
3. piling
Unclamp the holding frame 3.9 of centralizing bracket 3, control clamping oil cylinder 3.6 strokes make holding frame 3.9 become the guide mechanism of fixing stake pipe 4.Connecting the power source of pile driver 2 drives piles.Fixing stake pipe 4 is gone into mud gradually under the guiding of holding frame 3.9.If centralizing bracket 3 is vibrated during run-off the straight, the signal that provides according to the trim on the centralizing bracket 3 and heel sensor then, controlling level is adjusted oil cylinder 3.6, guarantees that centralizing bracket 3 is vertical with the sea level all the time with fixing stake pipe 4.After fixing stake pipe 4 is gone into mud 5~6m, tilt no longer easily, holding frame 3.9 is all separated, so that the submarine pipeline fixing device 6 of fixing stake pipe 4 upper ends and pile driver 2 can pass through the degree of depth that continues to drive piles and require.Unclamp hydraulic fixture, crane barge machine 11 hangs out pile driver 2 and centralizing bracket 3, prepares to lay a root canal pile.
4. the unsettled pipeline section in seabed is fixed
After fixing stake pipe 4 was squeezed into the degree of depth of sea bed requirement, the fixing device 6 that is sleeved on its upper end portion can put in place.Under the diver water rotate cantilever beams 6.2 to the submarine pipeline with the submarine pipeline axis normal.By the upper-lower position of very heavy 6.10 adjustment cantilever beams 6.2, its upper surface is contacted with the submarine pipeline bottom.The contacting point pad is gone up rubber plate, the anticorrosive coat of the submarine pipeline that prevents to wear and tear.U type clamp 6.1 internal surfaces are loaded onto rubber plate, block submarine pipeline, and the clamp two ends are fixed on the overhang 6.2 with screw bolt and nut.Tighten set screw nut 6.6, outer cutting ferrule 6.5 is locked on the fixing stake pipe 4.Unsettled section device 6 that promptly is fixed of submarine pipeline forced to fix.