CN1978793B - Low visibility underwater pile driving method - Google Patents
Low visibility underwater pile driving method Download PDFInfo
- Publication number
- CN1978793B CN1978793B CN2005101277968A CN200510127796A CN1978793B CN 1978793 B CN1978793 B CN 1978793B CN 2005101277968 A CN2005101277968 A CN 2005101277968A CN 200510127796 A CN200510127796 A CN 200510127796A CN 1978793 B CN1978793 B CN 1978793B
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- CN
- China
- Prior art keywords
- piling bar
- sleeve
- mark post
- piling
- steel pile
- Prior art date
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- Expired - Fee Related
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Abstract
The invention discloses low visibility under water pile pitching method. It includes the following steps: working out the distance between the riling structure center to steel pile sleeve edge and according to it to make marking pole; calculating the angle between the riling top and the steel pile sleeve and fixing the marking pole on the riling top along the angle; calculating steel pile offset according to velocity of flow; hoisting the steel pile to enter water along the marking pole end, according to steel pile water entry depth to judge steel pile tilt angle with the calculated offset; adjusting the marking pole and inserting the steel pile into sleeve. Because of advanced judging the effect for the pile pitching from the sea water flow, the invention can make the steel pile enter water as the setting, directly insert under water sleeve.
Description
Technical field
The present invention relates to pile pitching method under water, particularly relate to a kind of low visibility underwater pile driving method.
Background technology
In the recovery process of oil, often to carry out pitching pile under water at sea.At present, in the process of pitching pile, normally observe effectively guiding piling bar to insert the piling bar sleeve under water under water by ROV (REMOTE OPERATION VESSEL) or diver.Yet the lower place of visibility if also adopt the method for ROV or diver's observation, can't effectively guide piling bar to insert the piling bar sleeve under water under water, and adverse consequences such as duration even damage street shopping occasion a delay.Therefore, be badly in need of wanting that a kind of emerging of the lower technology of pitching pile under water of visibility that be applied to can be arranged.
Summary of the invention
The purpose of this invention is to provide a kind of blind pile pitching method under water that is specially adapted to.
For achieving the above object, the low visibility underwater pile driving method that the present invention adopts, include following steps: (1) at first calculates the distance of piling strtucture center to the piling bar sleeve edges, produces mark post according to this apart from length; (2) calculate the angle of piling bar sleeve at the pile foundation top, with mark post along this fixed angle in the pile foundation top, make the terminal sleeve edges of pointing to of mark post; Flow meter during (3) according to construction is calculated the side-play amount that piling bar produces in water surface place under the effect of ocean current; (4) loop wheel machine lifting piling bar, is measured the piling bar angle of inclination with bevel protractor the side-play amount that has calculated is checked when judging the stake point near the sleeve top according to the piling bar underwater penetration along the terminal entry of mark post; (5) according to checking the piling bar side-play amount mark post was adjusted, and lifted by crane piling bar along the terminal entry of mark post by loop wheel machine, piling bar finally inserts sleeve.
After having adopted method provided by the present invention, owing to judge that in advance marine stream is to the influence of piling bar when the pitching pile process, and by adjusting mark post, make piling bar according to an adjustment amount entry, so just make in the lower waters of visibility, do not need to observe guiding piling bar, thereby piling bar can directly be inserted under water the piling bar sleeve by ROV or diver.Certainly, the present invention more can be applied in visibility than higher waters, has not only reduced shallow water person's labour intensity, has more increased the accuracy of pitching pile.
Description of drawings
Fig. 1 is the schematic top plan view of piling strtucture among the present invention, and discloses the terminal sleeve edges of pointing to of mark post
Fig. 2 is the schematic diagram during the piling bar entry among the present invention
The specific embodiment
A kind of low visibility underwater pile driving method provided by the present invention includes following steps: (1) at first calculates the distance of piling strtucture center to the piling bar sleeve edges, produces mark post according to this apart from length; (2) calculate the angle of piling bar sleeve at the pile foundation top, with mark post along this fixed angle in the pile foundation top, make the terminal sleeve edges of pointing to of mark post; Flow meter during (3) according to construction is calculated the side-play amount that piling bar produces in water surface place under the effect of ocean current; (4) loop wheel machine lifting piling bar, is measured the piling bar angle of inclination with bevel protractor the side-play amount that has calculated is checked when judging the stake point near the sleeve top according to the piling bar underwater penetration along the terminal entry of mark post; (5) according to checking the piling bar side-play amount mark post was adjusted, and lifted by crane piling bar along the terminal entry of mark post by loop wheel machine, piling bar finally inserts sleeve.
At first as shown in Figure 1, calculate the distance of piling strtucture center 1, produce mark post 3 apart from length according to this to piling bar sleeve 2 edges according to the detailed design drawing of piling strtucture, mark post 3 require very straight and length accurate; Then, calculate the angle of piling bar sleeve at the pile foundation top, with mark post 3 along this fixed angle in pile foundation top 11, and make mark post 3 terminal sleeves 2 edges that point to; Afterwards, calculate the side-play amount that piling bar produces in water surface place according to construction flow meter at that time under the effect of ocean current, its design formulas is as follows:
G×M+F×N+f×L＝0
Below, lift a specific embodiment, this computational process is described
This piling bar is 1824 * 50mm, and length is 46m, and density is 7.849 * 10
3Kg/m
3Seawater velocity is spent a holiday, and to be decided to be 2 joints constant, i.e. 1.02m/s, and density is 1.025 * 10
3Kg/m
3, sea water advanced is 26m, but considers that the height of marine pile sleeve is 3.02m, so only need consider that the actual underwater penetration of stake is that 26-3.02=22.98m gets final product; Suppose that piling bar is issued to balance in the situation of a tilt angle alpha; Gained knowledge by structural static and to know: piling bar is issued to final balance in the effect that is subjected to 4 power (gravity G, buoyancy F, drag force f, pulling force T).Consider equalising torque, supposing that square is got at the piling bar top: gravitational moment is M under the motionless situation in piling bar top, buoyancy moment is N, and drag force moment is L.Then have following formula to set up:
G×M+F×N+f×L＝0 (1)
Piling bar gravity
G＝46(m)×7.849×10
3(kg/m
3)×9.8(N/kg)×3.142
×[1.824
2-(1.824-2×0.05)
2]/4(m
2) (2)
＝819354.6(N)
Piling bar buoyancy
F＝1.025×10
3(kg/m
3)×(46-23.02/cosα)(m)×9.8(N/kg)×3.142
×[1.824
2-(1.824-2x×0.05)
2]/4(m
2) (3)
The piling bar drag force
f＝0.65×1.824(m)×1.025×10
3(kg/m
3)×(46-23.02/cosα)(m)
×1.02
2(m/s)
2/2 (4)
Gravitational moment is M=46xsin α/2 (m) (5)
Buoyancy moment is N=((46-23.02/cos α)/2+23.02/cos α) * sin α (m) (6)
Drag force moment is L=((46-23.02/cos α)/2+23.02/cos α) * cos α (m) (7)
(2) (3) (4) (5) (6) (7) substitutions (1) formula found the solution:
α＝1.4135°
Then piling bar bottom maximum horizontal displacement is:
1＝46(m)×sinα＝1.135(m)
The maximum horizontal displacement of mark post place piling bar is:
X＝(22.98+1.944)(m)×tanα＝0.616(m)
After calculating side-play amount, as shown in Figure 2, lift by crane piling bar 4 along mark post 3 terminal entry with loop wheel machine, when judging the stake point near the sleeve top according to the piling bar underwater penetration, measure the piling bar angle of inclination with bevel protractor, and the side-play amount that has calculated checked, the method for check mainly is by visual observation commander loop wheel machine, makes distance between piling bar and the mark post end satisfy the requirement of calculating.After check was finished, along the terminal entry of mark post, piling bar finally inserted sleeve by loop wheel machine lifting piling bar.
After having adopted method provided by the present invention, owing to judge that in advance marine stream is to the influence of piling bar when the pitching pile process, and by adjusting mark post, make piling bar according to an adjustment amount entry, so just make in the lower waters of visibility, do not need to observe guiding piling bar, thereby piling bar can directly be inserted under water the piling bar sleeve by ROV or diver.Certainly, the present invention more can be applied in visibility than higher waters, has not only reduced shallow water person's labour intensity, has more increased the accuracy of pitching pile.
Claims (3)
1. low visibility underwater pile driving method, include following steps: (1) at first calculates the distance of piling strtucture center to the piling bar sleeve edges, produces mark post according to this apart from length; (2) calculate the angle of piling bar sleeve at the pile foundation top, with mark post along this fixed angle in the pile foundation top, make the terminal sleeve edges of pointing to of mark post; Flow meter during (3) according to construction is calculated the side-play amount that piling bar produces in water surface place under the effect of ocean current; (4) loop wheel machine lifting piling bar when judging the stake point near the sleeve top according to the piling bar underwater penetration, is measured piling bar angle of inclination with bevel protractor along the terminal entry of mark post, and the side-play amount that has calculated is checked; (5) according to checking the piling bar side-play amount mark post was adjusted, along the terminal entry of mark post, piling bar finally inserts sleeve by loop wheel machine lifting piling bar.
2. method according to claim 1 is characterized in that: described mark post requirement is very straight and length is accurate.
3. method according to claim 1 and 2 is characterized in that: in described (3) step, the formula of calculating the side-play amount that piling bar produces in water surface place according to the flow meter in when construction under the effect of ocean current is:
G×M+F×N+f×L＝0
In the formula: G-piling bar gravity, F-piling bar buoyancy, f-piling bar drag force, the M-gravitational moment is that the N-buoyancy moment is that L-drag force moment is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101277968A CN1978793B (en) | 2005-12-07 | 2005-12-07 | Low visibility underwater pile driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101277968A CN1978793B (en) | 2005-12-07 | 2005-12-07 | Low visibility underwater pile driving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1978793A CN1978793A (en) | 2007-06-13 |
| CN1978793B true CN1978793B (en) | 2010-07-28 |
Family
ID=38130083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101277968A Expired - Fee Related CN1978793B (en) | 2005-12-07 | 2005-12-07 | Low visibility underwater pile driving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1978793B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86102692A (en) * | 1985-04-19 | 1987-12-23 | 比奇特尔国际公司 | Offshore drilling and production platform compliant jacket |
| JP2002121752A (en) * | 2000-10-13 | 2002-04-26 | Shimizu Corp | Pile foundation and foundation structure |
-
2005
- 2005-12-07 CN CN2005101277968A patent/CN1978793B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86102692A (en) * | 1985-04-19 | 1987-12-23 | 比奇特尔国际公司 | Offshore drilling and production platform compliant jacket |
| JP2002121752A (en) * | 2000-10-13 | 2002-04-26 | Shimizu Corp | Pile foundation and foundation structure |
Non-Patent Citations (2)
| Title |
|---|
| 周俊昌.南黄海铁板砂海床插桩问题分析与对策－－常州35-2-1井插桩及作业过程分析.中国海上油气（工程）15 4.2003,15(4),2-4. |
| 周俊昌.南黄海铁板砂海床插桩问题分析与对策——常州35-2-1井插桩及作业过程分析.中国海上油气(工程)15 4.2003,15(4),2-4. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1978793A (en) | 2007-06-13 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100728 Termination date: 20121207 |