CN201962696U

CN201962696U - Underwater cup-shaped foundation with functions of hydraulic scouring assisted sinking and foundation consolidation

Info

Publication number: CN201962696U
Application number: CN2010202764430U
Authority: CN
Inventors: 古国维
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-30
Filing date: 2010-07-30
Publication date: 2011-09-07
Anticipated expiration: 2020-07-30

Abstract

An underwater cup-shaped foundation with the functions of hydraulic scouring assisted sinking and foundation consolidation is characterized in that a hydraulic jet pipe system is additionally arranged and includes water injection pipes, horizontal jet pipes and vertical jet pipes. Self-sinking anchor pile foundations (or suction anchor pile foundations) are a popular kind of foundations for ocean engineering as piling is not necessary for foundation installation. However, the method that an anchor body sinks due to the pressure difference caused by the venting and pressure reduction of an anchor pile box body through a vent pipe pre-buried in an upper cover is not easy to realize in shallow water areas due to insufficient pressure difference. In the underwater cup-shaped foundation, the hydraulic jet pipe system is arranged at the front end of the anchor body in addition to the conventional venting and pressure reduction devices, so that sinking can be assisted by hydraulic scouring to overcome the anchor body sinking difficulty caused by insufficient pressure difference. Meanwhile, special underwater mortar or cement dust can be jetted through the hydraulic jet pipe system for foundation consolidation. The attached or independent hydraulic jet pipe system can be used with the underwater cup-shaped foundation through pre-buried or preformed holes, or separately used for foundation consolidation (e.g. the hydraulic jet pipe system can be suspended in the soil to jet the special underwater mortar or cement dust for the consolidation of a whole foundation bearing layer). The totally-prefabricated underwater cup-shaped foundation adopting the technical scheme dispenses with a sunk well and cast-in-place concrete, adopts a load-carrying model similar to pile foundation building, is of great all-around application value for the construction of small offshore platforms and light water bridges, and is more pertinent for the construction in shallow water areas.

Description

The band sluicing helps cup-shaped basis heavy and that consolidated subsoil is provided with under water

Technical field

The utility model is that the anchor body front end on cup-shaped basis is under water set up the jetting piping, it is heavy to help with sluicing, dedicated mortar under the available same system injection water of while, or the cement special powder is with consolidated subsoil under the injection water, and the utility model has more specific aim in the construction of shallow water territory.The utility model belongs to the Underwater Engineering field.

Background technology

Cup-shaped basis is the most frequently used base form of land single storey industry workshop, be generally cast in situs, be packed into concrete in the pillar insertion cup and can erect pillar, it is much easy to build pillar than existing formwork, under water under the environment, except that piling under water is more difficult, must build open caisson, water is impaled just can water underpin after draining.The utility model proposes one and needn't build open caisson and needn't poured in place concrete, the similar pile foundation of squeezing into of stress model is given the cup-shaped base case of system entirely under water, has important use to be worth on small-sized platform and portable bridge waterborne are built at sea.

Summary of the invention

The purpose of this utility model is that cup-shaped under water basis is by setting up the jetting piping, it is heavy to help with sluicing, available same system sandblast slurry or cement flour are with consolidated subsoil simultaneously, lower for the construction of shallow water territory owing to hydraulic pressure, add sluicing help heavy, the favourable formula basis of drowning oneself sinks smoothly, when the sea bed soil property is bad, can reach the consolidated subsoil purpose with cement special powder method under dedicated mortar or the injection water under the same system injection water.Therefore the utility model. building for the small-sized platform in sea and portable bridge waterborne provides the base form of a simple and practical economy that more reliable assurance is arranged.

Operating principle of the present utility model: the formula of drowning oneself anchoring pile basis (or claiming suction type anchoring pile basis) is to use the known anchoring pile technology of ocean engineering, this technology just has document to propose to discuss as far back as the sixties, the later stage seventies enters small scale and large scale test, SBM company the first in 1980 is used for units such as the domestic University Of Tianjin oil field anchoring system eighties, and research obtains very big achievement to present technique, and is applied to domestic marine petroleum development gradually.Behind polygon or circle or the annular steel concrete anchoring pile casing sinking bottom, by the pre-buried ventilating pipe of loam cake to anchoring pile casing exhaust decompression to cause pressure reduction, make the anchor body overcome soil the resistance injection to design elevation.Because the anchor body overcomes the penetrating force of the resistance of soil, depend on that the deadweight of anchor body adds because the pressure reduction that anchoring pile casing exhaust decompression causes, so this pressure reduction can seem not enough in the phytal zone, this moment is if anchor body front end is promptly set up the jetting system at steel concrete casing sinking body of wall and contact wall front end, can reduce the resistance of soil by sluicing greatly, heavy thereby realization helps.When the sea bed soil property is bad, with same system water spray down dedicated mortar or under water cement special powder method then can reach the consolidated subsoil purpose.Additional or independent use the jetting piping, it both can be used with cup-shaped basis under water, also can be used for consolidated subsoil separately, as passing through loop wheel machine or repacking boats and ships, sink in the soil spraying hardened system, by cement special powder method under dedicated mortar or the injection water under this system's injection water, reach the purpose that whole basic bearing bed is reinforced.

Superiority of the present utility model is to contrast conventional piling back and builds the cast-in-place base case of open caisson, the utility model easy construction, workable, needn't mobilize large-scale erection equipment and pile driving equipment, but barge fortune in basis also can be inflated transportation by driving by the pre-buried ventilating pipe of first closed above, it is economical to save time, the utility model both can be used for the basis of marine small-sized platform, also can be used for portable bridge waterborne basis, can be applied to only leg (post) type separately, also can unite and be used for three legs (post), four legs (post) type platform, or portable bridge waterborne, applicable to the different depth of waters, different soil properties waters.

Description of drawings

Fig. 1--the cup-shaped under water basic sectional drawing of-1 steel concrete.

Fig. 1--the cup-shaped under water foundation plan of-2 steel concrete.

Fig. 2---1 for making the steel concrete rim of a cup into the scheme sectional drawing of steel bushing bearing.

Fig. 2---2 for making the steel concrete rim of a cup into the scheme plan view of steel bushing bearing.

Fig. 3 jetting piping axonometric drawing.

Fig. 4 additional or independent use jetting piping axonometric drawing.

Wherein 1 for armored concrete casing 2. to bury steel plate 10 be that vertical nozzle tube 20 be perforating nozzle for horizontal-jet pipe 18 for tube nozzle 19 for water injection pipe 17 for the steel-support post 16 that inserts for the armored concrete support column 15 that locating ring in the steel bushing 12 inserts for high-pressure grouting pipe valve 13 high-pressure grouting connecting hoses 14 for the floor 11 of putting more energy in order to give for bearing steel bushing 9 for hanger 8 for connecting hose 7 for breather pipe 6 for rim of a cup structure 5 for the perforate 4 that links wall for the casing case links wall 3

The specific embodiment

The prefabricated steel concrete casing 1 on land, barge in the lifting is transported to erecting bed waterborne, or envelope closes and cover and bury ventilating pipe, and the inflation transportation by driving is erecting bed waterborne extremely.Before hanging ventilating pipe flexible pipe 6 is connected.After surveying accurate sinking position, with loop wheel machine with the steel concrete casing 1 sinking bottom, when steel concrete casing 1 stands up in the bottom, and the lower end is embedded in the soil by deadweight, form the casing closed state after, by being arranged on ventilating pipe 5 on the headboard, connect flexible pipe 6 and bleed, form the casing internal pressure and be lower than the outer hydraulic pressure of casing when extracting the water yield that the water yield is infiltrated greater than the bottom out to extracardiac pumping, utilize pressure reduction that casing 1 is pressed in the soil, be pressed into design elevation until casing 1 and stop.When in-site measurement casing 1 sinks at need, then start the jetting system, inject water under high pressure to jetting piping 17, can reinstate standby pipe valve 21 in case of necessity, increase injected water volume.When the sea bed soil property is bad, change spray water dedicated mortar or cement special powder down under water with same system, to reach the consolidated subsoil purpose.Additional or independent use the jetting piping can be pre-buried, but yet preformed hole is not opened the hole when not required, opens the hole when needing, and inserts this piping, and notices that poling place's shutoff is good.

Behind the correct location, the cup-shaped under water basis of steel concrete, after the rim of a cup water spray is rinsed rim of a cup 4 well, insert the special-purpose microlith epoxy concrete of 50mm under water, pillar 14 inserts post gap and fills special-purpose microlith epoxy concrete under water, this special-purpose under water microlith epoxy concrete has does characteristics in high-strength almost wink, and existing at present multiple mode realizes.

As for the scheme that the steel concrete rim of a cup is made into steel bushing, continued to use the ripe way of marine jacket spud leg construction fully: after steel-support post 15 inserts, block by locating ring in the steel bushing 11, by high pressure grouting pipe valve 12,13 pour into high-strength sand, and steel-support post 15 and bearing steel bushing 8 are combined as a whole.

Claims

1. the band sluicing helps cup-shaped basis heavy and that consolidated subsoil is provided with under water, it is characterized in that setting up the jetting piping, and the jetting piping is by water injection pipe, the horizontal-jet pipe, and vertical nozzle tube is formed.

2. help the cup-shaped basis of heavy and consolidated subsoil setting to it is characterized in that setting up the jetting piping under water according to the described band sluicing of claim 1 and be arranged on steel concrete casing sinking body of wall and contact wall front end.

3. helping the cup-shaped basis of heavy and consolidated subsoil setting to it is characterized in that spraying hardened system under water according to the described band sluicing of claim 1 can be pre-buried, but also the preformed hole mode is inserted this piping.

4. help the cup-shaped basis of heavy and consolidated subsoil setting to it is characterized in that described to set up the steel concrete casing of jetting piping in being provided with can be polygon or circle or annular steel concrete casing under water according to the sluicing of claim 2 band.