CN2354869Y

CN2354869Y - Gravity suction anchor

Info

Publication number: CN2354869Y
Application number: CN 98208177
Authority: CN
Inventors: 徐继祖; 丁红岩; 王翎羽
Original assignee: HAIWANGXING OCEAN ENGINEERING TECHNOLOGY Co LTD TIANJIN CITY
Current assignee: HAIWANGXING OCEAN ENGINEERING TECHNOLOGY Co LTD TIANJIN CITY
Priority date: 1998-09-21
Filing date: 1998-09-21
Publication date: 1999-12-22
Anticipated expiration: 2008-09-21

Abstract

The utility model relates to a gravity suction anchor which belongs to an improved type of a traditional suction anchor. A thin plate steel structure of a traditional anchor top is changed into a weighting structure, such as a reinforced concrete structure or a pressurizing and weighting steel structure, so the self weight of the anchor body is remarkably increased. As a consequence, the force and depth of anchor sinking are increased, and the anchoring capacity can be increased. The novel suction anchor has excellent adaptability for shallow water conditions and ocean floors, wherein, the surface soil of which is harder. In addition, the form, the size and the weight of the weighting structure of the anchor top can be smartly determined according to the water depth, soil condition and the requirement of the force of the anchor sinking.

Description

The gravity-type suction anchor

The utility model belongs to the improvement of suction anchor structural shape.

The anchor tube of traditional suction anchor and anchor top all are the steel thin wall structures, and it is generally little to conduct oneself with dignity.The sinker that the sinking of suction anchor relies on gravity and suction to constitute is made every effort to overcome clothes soil anchor tube resistance is realized.The anchor that suction in the sinker power produces the decompression of drawing water in the anchor from anchor top diving pump pushes up difference of pressure up and down, and it is directly proportional with headwater depth with the anchor top; Gravity is conducted oneself with dignity from the anchor body.Under the big condition of the anchorage depth of water, suction that traditional suction anchor obtains is bigger, adds that the deadweight of anchor body is enough to that usually anchor is sunk to the seabed and reaches the desired degree of depth of anchor force.But under the shallow condition of anchorage water (as the depth of water below 10 meters), suction that traditional suction anchor obtains is less, add little anchor body deadweight and sinker power often be not enough to anchor is sunk to the anchor force desired depth.In addition, must by the deadweight of anchor body seabed certain depth (at least one rice) be inserted to form the initial sealing condition in the anchor lower end earlier as the prerequisite of implementing the suction sinker.And the deadweight of traditional suction anchor is less, if it is harder to meet veneer of soil, also often deficiency so that anchor sinks to anchor end initial sealing desired depth.

The purpose of this utility model is to provide a kind of modified version that overcomes the above-mentioned shortcoming of traditional suction anchor.

The technical solution of the utility model: a kind of suction anchor in order to moored float, the anchor tube of being opened wide by the bottom (2) is formed with the anchor top (1) that diving pump (3) is housed, and the anchor tube that it is characterized in that described suction anchor is that traditional thin walled steel structure and anchor push up is extra heavy reinforced concrete structure or the steel structure that adds ballast.Thereby this can enlarge markedly the deadweight of anchor body and effectively increase sinker power under the shallow water condition, makes it to satisfy the requirement of the sinker degree of depth, than under the hard-condition, also can sink to the initial sealing desired depth by deadweight at table soil.This novel suction anchor comes down to the combination of gravity anchor and suction anchor.The size and the weight sinker power as required on piggy-back anchor top determine that its structure is pressed general-duty reinforced concrete structure regulations or norm of steel structure design.

Using method of the present utility model: with loop wheel machine the anchor body is vertically put into water together with the diving pump on the anchor top during sinker, insert a seabed (6) and reach preliminary sealing desired depth (at least 1 meter) and open diving pump on then by repair ship and draw water that to make the anchor top form pressure reduction up and down be downward suction in step-down in to anchor in cast anchor a tin lower end of anchor deadweight effect, the anchor bucket continues to sink under gravity and suction combined action, until all sinking to the seabed, so sinker finishes, and pumping system is regained.Weighing anchor is the inverse operation of sinker, promptly by pumping system water filling pressurization in anchor, with anchor jack-up, with loop wheel machine anchor is regained again.For hanging of anchor, establish main hanger (4) and auxiliary hanger (5) on the anchor top.

Preceence of the present utility model: 1 gravity-type suction anchor has bigger sinker power than unidimensional traditional suction anchor, can reach the bigger sinker degree of depth under the same depth of water and soil condition, obtains bigger anchor force.2. the gravity-type suction anchor has adaptitude for immalleable shallow water of traditional suction anchor and top layer pan soil condition.Illustrated below in conjunction with drawings and Examples.

Fig. 1 is that section-drawing Fig. 2 of the related gravity-type suction anchor of the utility model is that the planar view of the related gravity-type suction anchor of the utility model wherein 1 is the reinforced concrete anchors top; 2 is steel anchor tube; 3 is diving pump; 4 is main hanger; 5 for auxiliary

Hanger; 6 is the seabed

Embodiment: a kind of gravity-type suction anchor, form by anchor top (1) and anchor tube (2), it is characterized in that anchor tube (2) is traditional thin walled steel structure, and anchor top (1) extra heavy reinforced concrete structure.Anchor tube (2) is made by steel plate (thick about 20mm), anchor top cement concrete cast-in-site, wherein pre-buried two pores for dress diving pump (3) usefulness, the anchor top is provided with center master's hanger (4) and auxiliary hanger (5), the heavy 34.8t of anchor top ferro-concrete, the heavy 9.5t of anchor tube steel plate, anchor body deadweight 43.3t.It is 10～25m that this anchor is suitable for the depth of water, and to 6 meters of the softer silty clay sinker degree of depth, its horizontal anchor force reaches 82t, and vertical anchor force reaches 62t.

Claims

1 one kinds of gravity-type suction anchors, the anchor tube of being opened wide by the bottom is formed with the anchor top that diving pump is housed, and it is characterized in that described anchor tube be that thin-wall construction and anchor push up is a heavy structure.

2. according to the suction anchor of claim 1, it is characterized in that said anchor top heavy structure is extra heavy reinforced concrete structure or the steel structure that adds ballast.