CN1730842A - Maritime air float hauling and positioning sinking mounting method for soft-foundation box-cylinder type infrastructure - Google Patents
Maritime air float hauling and positioning sinking mounting method for soft-foundation box-cylinder type infrastructure Download PDFInfo
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- CN1730842A CN1730842A CN 200510015014 CN200510015014A CN1730842A CN 1730842 A CN1730842 A CN 1730842A CN 200510015014 CN200510015014 CN 200510015014 CN 200510015014 A CN200510015014 A CN 200510015014A CN 1730842 A CN1730842 A CN 1730842A
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Abstract
The present invention is the marine air floatation hauling and locating and depositing installation process of case and barrel shaped foundation structure for soft soil. The construction process includes inflating the case and barrel shaped foundation structure in water for it to float and hauling to the installation site; locating in the floating state; deflating for deposition via controlling the deflation speed and amount to control the deposition speed and inclination; pumping out air from the structure and applying pressure for further deposition; pumping out water from the structure for further deposition until pumping out all water inside the structure and completing the installation. The said process needs no large hoisting and transportation apparatus, and is simple, controllable and low in cost.
Description
Technical field
The present invention relates to a kind of foundation structure that is inserted in the soft foundation---maritime air float hauling, location and the sinking mounting method of box-type suction foundation structure.Belong to the building structure construction method in coastal waters and the port works field.
Background technology
At the soft foundation in coastal waters and the port works, occurred a series of with the new construction of box-type suction foundation structure as architecture basics, as novel mole (removable cylinder foundation breakwater structure, the patent No.: 022531467; The upright arc diaphragm wall of removable steel reinforced concrete box-type suction foundation breakwater structure, 2004200294670), (mobile light casing basis retaining soil and water is every wave structure to enclose low bank between fields and shore protection the patent No.:, 012093904), seabed tunnel (box foundation seabed tunnel structure the patent No.:, 022090614), harbour (the bucket foundation gravitation-type deep-water dock structure on the soft foundation, the patent No.: 021213739) etc. the patent No.:.Box-type suction foundation structure in these new constructions is generally by the basic cylinder or the rectangular arrangement of polygon cylindrical shell of four top band lamina tectis, lower openings, and being rigidly connected by the side plate between top board and basic cylindrical shell forms.If such structure is made of steel, about 150 tons to 500 tons of weight, if use concrete for making, about 1000 tons to 3000 tons of weight.During use, the box-type suction foundation structure is inserted in the soft foundation of seabed basis as superstructure.
Use conventional methods these structures are installed, general earlier with prefabricated structure slippage or lift on the transport barge, be transported to the erecting bed with transport barge, hang with argosy then structure is hung onto mounting points location from transport barge, adopt the method that vacuumizes and add ballast that structure is sunk in the earth afterwards.This job practices needs large-scale ships that transport and ship to hang equipment on the one hand, and the use cost of these equipment is very high; Work progress complexity on the other hand, efficiency of construction is lower, and construction quality is difficult to guarantee, and when adding under the method for ballast sink structure as employing, the degree of skewness of structure is difficult to control, also needs to have bad luck a large amount of ballast block or Ballast Water.
Can pneumatically supported characteristics at the box-type suction foundation structure, can adopt a cover new method to come it is transported, locatees and sinks to installing, promptly adopt air floating method that it is hauled, in the air supporting state it is carried out installing and locating, the method that adopts venting, vacuumizes and draw water is to the degree of skewness of its sink installation and the installation of adjustment structure.
Summary of the invention
The objective of the invention is to propose a kind of safe, economic, practical haul, location and sinking mounting method at the box-type suction foundation structure that is inserted in the soft foundation.
For achieving the above object, the present invention is realized by following technical proposals: a kind of soft-foundation box-cylinder type infrastructure maritime air float hauling and positioning sinking mounting method, described box-type suction foundation structure is meant that it is the overall structure that uncovered cylinder or polygon cylindrical shell are regularly arranged into that a plurality of upper ends are provided with lamina tecti, lower end, wherein the lamina tecti of each cylindrical shell or upper end sidewall are provided with the ventilation and the suction eye of band pipe valve, the maritime air float hauling and the positioning sinking mounting method of such box-type suction foundation structure is characterized in that comprising following process:
(1) air float hauling: under the prefabricated box-type suction foundation structure behind the water, inflate in cylindrical shell by the air vent on each cylindrical shell, make structure float on the water surface, adjust the aeration quantity in the cylindrical shell, make the underwater penetration of each cylindrical shell reach the requirement of satisfying towage stability, just can haul afterwards it;
(2) air supporting location: box-type suction foundation structure air float hauling is to the infield, emit the portion gas in each cylindrical shell, at the bottom of structure is sunk down into tin and the distance between the mud face be 0～1.0m, under this air supporting state, with structure lentamente alongside by a location barge of having had good positioning, adjust the relative position of structure by hawser then, finish the air supporting location at the barge edge; Or arrange 4 to 8 anchorage hawsers in the box-type suction foundation structural perimeter, the air supporting location that utilizes the folding and unfolding of each anchorage hawser to finish the box-type suction foundation structure; Behind the structure air supporting location, continue to emit the gas in each cylindrical shell, structure is sunk, not with before the mud face contact, position observation, be offset, then stop the sinking of exitting, position again as stated above as fruit structure in the cylindrical shell bottom;
(3) going into mud sinks to installing: the mud sinking installation process of going into of box-type suction foundation structure comprises:
1) sink by dead load exhaust outlet and leveling: open ventilation and suction eye on each cylindrical shell, under the dead load effect, gas is discharged in the tube, and cylindrical shell is gone into mud, comes the subsidence velocity of control structure by the control exhaust velocity; The inclination situation of observation structure in the sinking process, when the structure run-off the straight, the gas that stops or reducing in the cylindrical shell of the big side of deflection is emitted, gas in the cylindrical shell of maintenance or the little side of increasing deflection is emitted, make the structure recovery level, continue balanced venting then and sink, until box-type suction foundation dead load and soil body resistance balance, till structure is no longer sunk; If dead load is bigger or the depth of water is bigger, after the gas in the cylindrical shell was discharged entirely, structure also continued to sink under the deadweight effect, and then the interior water body of tube can be discharged from ventilation and suction eye, until dead load and soil body resistance balance, till structure is no longer sunk;
2) leveling of exerting pressure by bleeding is sunk: structure if also have gas to exist in the tube, then utilizes jet vacuum pump from air vent or suction eye gas in the tube to be extracted out after stopping to sink by deadweight, structure continuation sinking; The inclination situation of observation structure in the sinking process, when the structure run-off the straight, the gas that stops or reducing in the cylindrical shell of the big side of deflection is extracted out, gas in the cylindrical shell of maintenance or the little side of increasing deflection is extracted out, make the structure recovery level,. continue the equilibrium sinking of bleeding then, till the gas in each cylindrical shell of box-type suction foundation structure is all extracted out;
3) leveling of exerting pressure by drawing water is sunk: after the gas in the box-type suction foundation structure cylindrical shell is all discharged, utilize proof submersible sand discharging pump or jet pump from suction eye water body in the tube to be extracted out, structure continues to sink; The inclination situation of observation structure in the sinking process, when the structure run-off the straight, the water body that stops or reducing in the cylindrical shell of the big side of deflection is extracted out, water body in the cylindrical shell of maintenance or the little side of increasing deflection is extracted out, make the structure recovery level, continue the equilibrium sinking of drawing water then, till the water body in each was all extracted out, the sinking of box-type suction foundation structure installed.
Superiority of the present invention is: the transportation of box-type suction foundation structure does not need the large transport ship oceangoing ship, the on-the-spot installation do not need large-scale lifting boats and ships and has bad luck a large amount of ballast block or Ballast Water, positioning sinking equipment is simple, easy construction, subsidence velocity is fast, degree of skewness is controlled easily, and the integrated construction expense is low.
Description of drawings
Below in conjunction with accompanying drawing the present invention is illustrated.
Fig. 1 is with the breakwater structure sectional schematic diagram of box-type suction foundation structure as the basis.
Fig. 2 is the bottom plan view of box-type suction foundation structure.
Fig. 3 is in the air supporting floating state for the box-type suction foundation structure.
Fig. 4 is in the air float hauling state for the box-type suction foundation structure.
Fig. 5 carries out air supporting location schematic diagram for the alongside of box-type suction foundation structure in barge side, location.
Fig. 6 utilizes the anchorage hawser for the box-type suction foundation structure and carries out air supporting location schematic diagram.
Fig. 7 is in by dead load exhaust sinking state for the box-type suction foundation structure.
Fig. 8 is in the sinking state of bleeding for the box-type suction foundation structure.
Fig. 9 is in the sinking state that draws water for the box-type suction foundation structure.
Figure 10 is the box-type suction foundation structure state that sinks to being in place.
1 is basic cylindrical shell among the figure, and 2 is the tube lamina tecti, and 3 is ventilation and the suction eye on the tube lamina tecti, and 4 is the structural upright cylinder mole of box-type suction foundation, and 5 is the junction plate between basic cylindrical shell, and 6 is the intermediate cylinder cabin that four basic cylindrical shells and junction plate surround,
7 for the air in the cylindrical shell of air supporting floating state basis is in pressured state,
8 is the towing cable rope of air float hauling,
9 for the air pressure in the cylindrical shell of air float hauling state front side is slightly larger than the interior air pressure of rear side cylindrical shell,
10 are the location barge, 11 anchorage hawsers for the location barge,
12 for the alongside of box-type suction foundation structure in location the cleating of barge,
13 is the air supporting location anchorage hawser of box-type suction foundation structure,
14 is air in the expelling tube,
15 for the air pressure in the exhaust sinking state cylindrical shell a little more than atmospheric pressure,
16 are an air in the extraction tube,
17 for the air pressure in the sinking state cylindrical shell of bleeding less than atmospheric pressure,
18 are a water body in the extraction tube,
19 for the water pressure in the sinking state cylindrical shell of drawing water less than tube outward with the water pressure at degree of depth place,
20 contact with the foundation soil face for box-type suction foundation structure basis, the back tube top board downside that sinks to putting in place.
The specific embodiment
One embodiment of the invention is as follows: box-type suction foundation breakwater structure as depicted in figs. 1 and 2, wherein 4 of the box-type suction foundation structure basic cylindrical shells are diameter 10.5m, high 8m, the concrete cylinder of wall thickness 0.25m, the barrel spacing 2.5m of adjacent two cylindrical shells, adjacent two cylindrical shells connect with the thick connection wall of 0.5m, it is identical with the cylindrical shell height to connect wall, the lamina tecti of four basis tubes is a square radius plate, thick 0.50m, it has girt strip, heavily about 1500 tons of this box-type suction foundation structure, the about 5～6m of the high water mark depth of water of infield.
After this box-type suction foundation structure is prefabricated on land, adopt slideway or diving barge that it is moved in water.Before the water, the air vent place on the lamina tecti in 4 basis tubes and intermediate cylinder cabin all is connected inflation and outlet valve and pipeline, on the lamina tecti of 4 basis tubes a proof submersible sand discharging pump is installed respectively under the structure.
In the water process, after basic barrel bottom is not had by water logging, in tube cabin, four bases and middle cylindrical shell, inflate under the box-type suction foundation structure.As the about 4.0m of basic barrel bottom entry, when each cylindrical shell internal gas pressure reached 35.0kPa, structure promptly may float in the water, shows as Fig. 3.
The floating slow traction of box-type suction foundation structure of inflation is left slideway or diving barge, emit the part air in each cylindrical shell, make the about 4.5～5.0m of basic barrel bottom entry, the about 1.0～1.5m of envelope air water post in each cylindrical shell, air in the cylindrical shell overflows when preventing that structure is waved in the haul process like this, make in addition air float hauling advance in air pressure in the cylindrical shell of front side basis greater than the air pressure in the cylindrical shell of rear side basis, like this so as in haul to be advanced structural entity maintenance level.Under this floading condition, can show as Fig. 4 with the structure air float hauling to the erecting bed.
When box-type suction foundation structure air float hauling behind the infield, the alongside of box-type suction foundation structure by the barge of location, is emitted portion gas in the tube, structure is sunk, the mud face is approached in the cylindrical shell bottom; Under the air supporting floating state, the plan-position by the hawser adjustment structure between box-type suction foundation structure and the location barge accurately is positioned structure for the infield, shows as Fig. 5.
Under suitable tide water level situation, evenly emit the air in each cylindrical shell of box-type suction foundation structure, structure is discharged with the air in each cylindrical shell under the deadweight effect and is slowly sunk, and shows as Fig. 7.In the sinking process of this moment, by adjusting the discharge quantity in each cylindrical shell, make structure maintenance level, when occurring tilting in the structure sinking process, the air that stops or reducing in the cylindrical shell of the big side of deflection is emitted, air in the cylindrical shell of maintenance or the little side of increasing deflection is emitted, and behind structure level, evenly emits the air in each cylindrical shell again.On softer ground, venting back structure basic barrel under the deadweight effect can sink to 4～5m in the foundation soil.
For the tide water level situation of this box-type suction foundation structure and corresponding infield, after stopping to sink by the deadweight exhaust, the air in each cylindrical shell is all discharged, and is full of water in the cylindrical shell.Close the venting valve on each top, open the suction pump on each cylindrical shell, the water in the cylindrical shell is extracted out, structure continues to sink, and shows as Fig. 9.In the sinking process of this moment, by adjusting the pump-out of each cylindrical shell, make structure maintenance level, when occurring tilting in the structure sinking process, the cylindrical shell that stops or reducing the big side of deflection draws water, the cylindrical shell of maintenance or the little side of increasing deflection draws water, and behind structure level, evenly extracts the water in each cylindrical shell again out, water in each cylindrical shell is extracted out fully, cylindrical shell top board downside with contact above the ground, then this box-type suction foundation structure is in place, and shows as Figure 10.If it is 60m that an efficient is installed on each tube top, basis
3The suction pump of/h then sank by the deadweight exhaust with 1 hour, drew water to sink structure is in place with 6～8 hours.
When the box-type suction foundation structure adopts the inventive method to transport with the positioning sinking installation, only need one 1500 horsepowers tugboat, a middle-size and small-size location barge, the proof submersible sand discharging pump of 4 7.5kW and corresponding electricity generation system, haul and positioning sinking equipment are simple, easy construction, and subsidence velocity is fast, degree of skewness is controlled easily, and the integrated construction expense is low.
Claims (1)
1. soft-foundation box-cylinder type infrastructure maritime air float hauling and positioning sinking mounting method, described box-type suction foundation structure is meant that it is the overall structure that uncovered cylinder or polygon cylindrical shell are regularly arranged into that a plurality of upper ends are provided with lamina tecti, lower end, wherein the lamina tecti of each cylindrical shell or upper end sidewall are provided with the ventilation and the suction eye of band pipe valve, the maritime air float hauling and the positioning sinking mounting method of such box-type suction foundation structure is characterized in that comprising following process:
(1) air float hauling: under the prefabricated box-type suction foundation structure behind the water, inflate in cylindrical shell by the air vent on each cylindrical shell, make structure float on the water surface, adjust the aeration quantity in the cylindrical shell, make the underwater penetration of each cylindrical shell reach the requirement of satisfying towage stability, just can haul afterwards it;
(2) air supporting location: box-type suction foundation structure air float hauling is to the infield, emit the portion gas in each cylindrical shell, at the bottom of structure is sunk down into tin and the distance between the mud face be 0～1.0m, under this air supporting state, with structure lentamente alongside by a location barge of having had good positioning, adjust the relative position of structure by hawser then, finish the air supporting location at the barge edge; Or arrange 4 to 8 anchorage hawsers in the box-type suction foundation structural perimeter, the air supporting location that utilizes the folding and unfolding of each anchorage hawser to finish the box-type suction foundation structure; Behind the structure air supporting location, continue to emit the gas in each cylindrical shell, structure is sunk, not with before the mud face contact, position observation, be offset, then stop the sinking of exitting, position again as stated above as fruit structure in the cylindrical shell bottom;
(3) going into mud sinks to installing: the mud sinking installation process of going into of box-type suction foundation structure comprises:
1) sink by dead load exhaust outlet and leveling: open ventilation and suction eye on each cylindrical shell, under the dead load effect, gas is discharged in the tube, and cylindrical shell is gone into mud, comes the subsidence velocity of control structure by the control exhaust velocity; The inclination situation of observation structure in the sinking process, when the structure run-off the straight, the gas that stops or reducing in the cylindrical shell of the big side of deflection is emitted, gas in the cylindrical shell of maintenance or the little side of increasing deflection is emitted, make the structure recovery level, continue balanced venting then and sink, until box-type suction foundation dead load and soil body resistance balance, till structure is no longer sunk; If dead load is bigger or the depth of water is bigger, after the gas in the cylindrical shell was discharged entirely, structure also continued to sink under the deadweight effect, and then the interior water body of tube can be discharged from ventilation and suction eye, until dead load and soil body resistance balance, till structure is no longer sunk;
2) leveling of exerting pressure by bleeding is sunk: structure if also have gas to exist in the tube, then utilizes jet vacuum pump from air vent or suction eye gas in the tube to be extracted out after stopping to sink by deadweight, structure continuation sinking; The inclination situation of observation structure in the sinking process, when the structure run-off the straight, the gas that stops or reducing in the cylindrical shell of the big side of deflection is extracted out, gas in the cylindrical shell of maintenance or the little side of increasing deflection is extracted out, make the structure recovery level, continue the equilibrium sinking of bleeding then, till the gas in each cylindrical shell of box-type suction foundation structure is all extracted out;
3) leveling of exerting pressure by drawing water is sunk: after the gas in the box-type suction foundation structure cylindrical shell is all discharged, utilize proof submersible sand discharging pump or jet pump from suction eye water body in the tube to be extracted out, structure continues to sink; The inclination situation of observation structure in the sinking process, when the structure run-off the straight, the water body that stops or reducing in the cylindrical shell of the big side of deflection is extracted out, water body in the cylindrical shell of maintenance or the little side of increasing deflection is extracted out, make the structure recovery level, continue the equilibrium sinking of drawing water then, till the water body in each was all extracted out, the sinking of box-type suction foundation structure installed.
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| CNB2005100150141A CN100343454C (en) | 2005-09-07 | 2005-09-07 | Maritime air float hauling and positioning sinking mounting method for soft-foundation box-cylinder type infrastructure |
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| CNB2005100150141A CN100343454C (en) | 2005-09-07 | 2005-09-07 | Maritime air float hauling and positioning sinking mounting method for soft-foundation box-cylinder type infrastructure |
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| CN100343454C CN100343454C (en) | 2007-10-17 |
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