CN101298765B

CN101298765B - Novel single pillar structure and mounting method thereof

Info

Publication number: CN101298765B
Application number: CN2007101414930A
Authority: CN
Inventors: 王翎羽
Original assignee: HAIWANGXING OCEAN ENGINEERING TECHNOLOGY Co LTD TIANJIN CITY
Current assignee: NEPTUNE OFFSHORE ENGINEERING DEVELOPMENT CO., LTD.
Priority date: 2007-08-27
Filing date: 2007-08-27
Publication date: 2010-04-21
Anticipated expiration: 2027-08-27
Also published as: CN101298765A

Abstract

A new single post structure and an installation method thereof are disclosed, the structure is composed by a suction pile + driven pile 8, a central vertical post 9 and a small platform 10, characterized in that the structure adopts a combination basic of suction type + driven type, the small platform 10 forms an integrative structure with the central vertical post 9 by welding. A central guide cylinder 3 is located in centre of the cylinder body 1, upper end is higher than a top cover 2 with a bell-mouthed shape, the lower end is horizontal to bottom end of the cylinder body 1. A mud-cleaning jetting ring 7 is provided in middle of a lower rib plate 5 of the central guide cylinder 3 and a grouting jetting ring is provided in the middle of the central guide cylinder 3. The top cover 2 is provided with a pump hole 12 for installing an underwater pump 13 or a pneumatic pump. The invention has the advantages that the new single post structure varies P-Y curve of surface layer soil, which is in favour of reduction of displacement under horizontal force, and meanwhile enhances structural intensity of the post. During the construction, the combination basic of the new single post structure lessens hoisting weight, in the meantime, the suction pile assists and positions the driven pile.

Description

A kind of new single pillar structure and mounting method thereof

Technical field

The invention belongs to the innovation of marine single pillar structure pattern in ocean engineering field and mounting method thereof.

Background technology

At present in ocean engineering extensive use two class single pillar structures are arranged, a class is the driven pile rod structure, another kind of is the suction pile rod structure.Characteristic according to earth resistance, the bearing capacity of topsoil is very weak, and the driven pile rod structure is elongated shape, therefore it is being subjected to the natural environment masterpiece time spent can produce big horizontal movement at Ni Mianchu, cause driven pile rod structure fatigue to make its damage easily, also need erection device less important work when driven pile is constructed simultaneously at sea, but the characteristics of this class formation are the offshore construction technology maturations; The suction pile has then improved the supporting capacity of topsoil by self structure, but because the suction pile rod structure is stubby shape, be subjected to the natural environment masterpiece time spent can cause structure to be toppled, but the characteristics of this class formation are offshore construction duration weak points and can reuse.In addition, suction pile rod structure form and special marine suction sinking method adapt.Do the time spent at above-mentioned two class single pillar structures in the external force of experiencing certainly and all have weak point.

Summary of the invention

For optimizing structure and remedying the defective separately of two class single pillar structures, effectively reduce use to the offshore construction resource, the invention provides a kind of new single pillar structure and mounting method thereof.This single pillar structure has the suction pile concurrently and squeezes into the pattern of pile two class formations, by wirerope with suction pile with driven pile links into an integrated entity or split lifting entry is transferred.This single pillar structure is because the structural shape that itself is had, corresponding offshore installation method is also special---and be suction sinking method and the associating of squeezing into method, structure is by forming the suction seal condition from the mud of reentrying, and can in suction pile suction sinking penetration process, finish leveling and clear mud, after injection puts in place, make driven pile injection ocean bottom soil desired depth with pile hammer, grouting makes driven pile and suction pile be consolidated into one then, improve driven pile and suction pile deficiency separately, improve single pillar structure and bear the ability of environmental forces, and reached the use that reduces the offshore construction resource.

The technical solution adopted for the present invention to solve the technical problems is: new single pillar structure by cylindrical shell, top cover, centre pilot tube, go up floor, ring is dashed in floor, grouting spray down, clear mud spray is formed towards ring, driven pile, gin pole and chain-wales, it is characterized in that adopting suction type+squeeze into the commbined foundations of formula, between cylindrical shell and the centre pilot tube by top cover, go up floor and following floor connects as one structure (abbreviation suction pile).The centre pilot tube is positioned at cylindrical shell central authorities, and the upper end exceeds top cover, becomes the horn mouth shape, is used for the pitching pile guiding of driven pile, and the lower end flushes with the cylindrical shell bottom.The place is provided with mud spray clearly and dashes ring in the middle of the following floor of centre pilot tube, and the upper end is connected with high-pressure pump when the suction pile injection; The place is provided with the grouting spray and dashes ring in the middle of the centre pilot tube, and the upper end supports the grouting pump on the ship to be connected with construction.Top cover is provided with pumping hole, is used for the pump that extracts water in the suction pile is installed, as submersible pump or air-powered pump.When new single pillar structure is at sea installed, can transport by barge loading, crane ship lifting entry, rely on deadweight to make suction pile go into mud and reach the initial sealing condition, start clear mud spray and dash the high-pressure pump of ring, remove the soil plug in the centre pilot tube, and extract water in the suction pile, make suction pile in injection ocean bottom soil process, finish clear mud in the centre pilot tube by submersible pump.This process can draw water submersible pump or water filling by control suction pile top pump valve system, and that adjusts suction pile goes into the mud degree of depth and levelness.After suction pile puts in place, carry out piling work, after driven pile reaches pre-provisioning request, can carry out the grouting operation between suction pile and the driven pile, at last gin pole is installed on the driven pile together with chain-wales.

The invention has the beneficial effects as follows that new single pillar structure is big at the native counter-force P of Ni Mianchu P-Y curve, help reducing the displacement under the horizontal force action, also improved the structural strength of stake simultaneously.In construction, new single pillar structure can and be squeezed into pile with suction pile and lift respectively, reduces to lift weight, has reduced the requirement to crane ship, and suction pile rises driven pile and sets upright positioning action simultaneously, need not the erection device of driven pile.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is elevation of the present invention and sectional view;

Fig. 2 is that schematic diagram is transferred in one lifting entry of the present invention;

Fig. 3 is that the present invention installs schematic diagram.

Wherein: the 1-cylindrical shell; The 2-top cover; 3-centre pilot tube; The last floor of 4-; Floor under the 5-; Ring is dashed in 6-grouting spray; Ring is dashed in the clear mud spray of 7-; The 8-driven pile; The 9-gin pole; The 10-chain-wales; The 11-pile follower; The 12-pumping hole; The 13-submersible pump; The 14-crane barge; The 15-water surface; 16-soil.

The specific embodiment

New single pillar structure is seen Fig. 1, by cylindrical shell 1, top cover 2, centre pilot tube 3, go up floor 4, ring 6 is dashed in floor 5, grouting spray down, clear mud spray is dashed ring 7, driven pile 8, gin pole 9, chain-wales 10 and pumping hole 12 and formed, driven pile 8 is positioned at centre pilot tube 3, and gin pole 9 is connected with driven pile 8 with chain-wales 10; Top cover 2 end faces are provided with pumping hole 12, and submersible pump 13 or air-powered pump are installed in its top.

New single pillar structure one lifting entry is transferred and is seen Fig. 2, and transferred to seabed mud face by sling suction pile, driven pile 8 and pile follower 11 and submersible pump 13 of crane barge 14 this moment, and make suction pile and driven pile 8 basic initial penetration into mud reach air-proof condition by deadweight.

New single pillar structure is by extracting the water in the suction pile, make in the suction pile injection ocean bottom soil 16, in injection soil 16 processes, the pump valve system draws water or water filling submersible pump 13 by control suction pile top, adjust suction pile and go into the mud degree of depth and levelness, water under high pressure sprays towards 7 pairs of center guide cylinders of ring, 3 interior soil by clear mud and fills in the row removing simultaneously.After the suction pile injection puts in place, with pile hammer impact pile follower 11 make driven pile 8 also injection to soil 16 desired depths, dashing ring 6 by grouting spray then is in the milk toward the annular space between centre pilot tube 3 inwalls and driven pile 8 outer walls, at last gin pole 9 is mounted on the driven pile 8 together with chain-wales 10, sees Fig. 3.

Claims

1. new single pillar structure, by cylindrical shell, top cover, centre pilot tube, go up floor, ring is dashed in floor, grouting spray down, clear mud spray is formed towards ring, driven pile, gin pole and chain-wales, its feature adopts suction type+squeeze into commbined foundations of formula, chain-wales and the gin pole structure that is welded as a whole.

2. new single pillar structure according to claim 1 is characterized in that the centre pilot tube inwall of said suction pile and the annular space between the driven pile outer wall are one by cement-grouting consolidation.

3. new single pillar structure according to claim 1 is characterized in that said suction pile top is provided with pumping hole, is used for installing the pump that extracts water in the suction pile.

4. new single pillar structure according to claim 1 is characterized in that the centre pilot drum outer wall of said suction pile is adorned 2 sprays towards ring, and one is used for removing the soil plug, and another is used for being in the milk.

5. new single pillar structure according to claim 1 is characterized in that said suction type+squeeze into the commbined foundations of formula, and is big at the native counter-force P of Ni Mianchu P-Y curve, helps reducing the displacement under the horizontal force action, also improved the structural strength of stake simultaneously.

6. according to the mounting method of the described new single pillar structure of claim 1 to 5, it is characterized in that two kinds of job practicess that the marine pile foundation engineering of commbined foundations collection of said employing suction type+squeeze into formula is installed, it is suction sinking method and the installation of uniting of squeezing into method: at first crane ship lifting suction pile entry, rely on deadweight to make suction pile go into mud and reach the initial sealing condition, submersible pump extracts the water in the suction pile, make suction pile in injection ocean bottom soil process, finish clear mud in the centre pilot tube, after suction pile puts in place, carry out piling work, after driven pile reaches pre-provisioning request, can carry out the grouting operation between suction pile and the driven pile, finish the construction on basis.