CN105714837B - Method off-lying sea is pulled out in one kind without shielding steel cofferdam Longkou flow-guiding construction method - Google Patents
Method off-lying sea is pulled out in one kind without shielding steel cofferdam Longkou flow-guiding construction method Download PDFInfo
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- CN105714837B CN105714837B CN201610075497.2A CN201610075497A CN105714837B CN 105714837 B CN105714837 B CN 105714837B CN 201610075497 A CN201610075497 A CN 201610075497A CN 105714837 B CN105714837 B CN 105714837B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
The invention discloses pulling out method off-lying sea in one kind without shielding steel cofferdam Longkou flow-guiding construction method, including：A, a part of steel sheet pile formation water conservancy diversion water passage is pulled out in the low tide period on the side interval of steel cofferdam Longkou；B, the inserting piling steel sheet pile at Longkou, until completing the closure of Longkou；C, the steel sheet pile inserting piling pulled out by are to design altitude to reset；D, the inserting piling compartment stake between the steel sheet pile of reset, and the jackstone in the compartment of formation, water conservancy diversion water passage is blocked, and completes steel cofferdam Longkou closure construction.Method off-lying sea is pulled out in the present invention without shielding steel cofferdam Longkou flow-guiding construction method, the water conservancy diversion closure construction to steel cofferdam Longkou under the conditions of off-lying sea is unprotected, and construct simple rapid, efficiency high, short time limit is realized.The method of the present invention can make it that water-head is within ± 100cm inside and outside steel cofferdam in the case where ensureing safety, progress, substantially reduce the impulsive force that steel cofferdam is born by inside and outside water-head, improve the reliability and stability of steel cofferdam.
Description
Technical field
It is to pull out method off-lying sea in one kind to lead without shielding steel cofferdam Longkou specifically the present invention relates to steel cofferdam construction technology
Flow construction method.
Background technology
Cushion cap in deep water foundation is typically constructed using " cofferdam method ", and the work of a dry construction bearing platform is created using cofferdam
Industry space, and steel cofferdam is a kind of conventional cofferdam.When carrying out cofferdam construction, it is necessary to enter in the final stage of construction to Longkou
Row closes up.And when at sea being constructed, influenceed by monsoon, typhoon, greasy weather and flood tide influences, tidal range is big.Spring tide
Flood period surges larger, and duration of tide is very fast, and when steel sheet pile Longkou closes up, because being influenceed by tidewater, the low tide time is shorter,
Longkou closure time meeting wretched insufficiency, the closure construction to steel cofferdam Longkou causes extreme difficulties.
Especially, when carrying out offshore construction, because cofferdam inner area is big, the water-head produced by the seawater fluctuation time of tide
Understand and great pressure is caused to steel cofferdam, also, the current caused by water-head are intended to flow in or out from Long Kouchu, and this can give
Longkou, which closes up, brings great difficulty.In addition, offshore construction also has the following problems：（1）Because off-lying sea is without shielding isolated island operation,
Execution conditions are arduous, and difficulty of construction is big；（2）Stormy waves is more, and the engineering time is limited, need to be completed again before typhoon arrives, the duration is tight；
（3）Make moist position influence, and water-head is in ± 3.0m or so inside and outside steel cofferdam, and closures current is rapid, and it is big that Longkou closes up difficulty；（4）With
The gradually closure of diversion section, delivery port reduces, and flow rate of water flow can increase；The turbulent river crashes its way through, scouring sediment, influences platform stable,
Critical workmen's safety.
The content of the invention
The technical problem to be solved in the present invention is to provide method off-lying sea is pulled out in one kind without shielding steel cofferdam Longkou water conservancy diversion construction party
Method, it is adaptable to Longkou water conservancy diversion construction, and the simple rapid, efficiency high of construction are carried out under the conditions of off-lying sea is unprotected.
In order to solve the above-mentioned technical problem, the invention provides pull out method off-lying sea in one kind to apply without shielding steel cofferdam Longkou water conservancy diversion
Work method, including：
A, a part of steel sheet pile formation water conservancy diversion water passage is pulled out in the low tide period on the side interval of steel cofferdam Longkou；
B, the inserting piling steel sheet pile at Longkou；
C, the steel sheet pile inserting piling pulled out by are to design altitude to reset；
D, the inserting piling compartment stake between the steel sheet pile of reset, and the jackstone in the compartment of formation, water conservancy diversion water passage is cut
It is disconnected, complete steel cofferdam Longkou closure construction.
Further, in the step A, above pull out before the steel sheet pile, first will on the steel sheet pile that pulls out blocked from bottom, institute
State after being pulled out on steel sheet pile, form bar gate type water conservancy diversion water passage.
Further, the width of the water conservancy diversion water passage is not less than 8 meters.
Further, in the step A, the height pulled out on steel sheet pile is 2.5-3.5 meters.
Further, in the step A, the height pulled out on steel sheet pile is 3 meters.
Further, in the step A, when pulling out a part of steel sheet pile on interval, every pulling out a steel on a steel sheet pile
Sheet pile.
Further, in the step A, it is upper pull out the steel sheet pile before, first set solid in the middle part of the steel sheet pile that is pulled out on not
Determine pull bar.
Further, in the step B, in Longkou, section and installs pull bar at the row's steel sheet pile of inserting piling two, after pull bar installation
Into the compartment formed between two row's steel sheet piles, jackstone and hydraulic reclamation are husky, complete the closure of Longkou.
Further, after the step A, lock is opened up with both sides steel sheet pile top corresponding section on the upper steel sheet pile pulled out
Button hole, is docked adjacent steel sheet pile by latching.
Further, after the step C, seal is set to seal the bonnet lock hole at the bonnet lock hole.
Method off-lying sea is pulled out in the present invention without shielding steel cofferdam Longkou flow-guiding construction method, is realized in the unprotected bar in off-lying sea
To the water conservancy diversion closure construction of steel cofferdam Longkou under part, and construct simple rapid, efficiency high, short time limit.The method of the present invention exists
In the case of ensureing safety, progress, it can make it that water-head within ± 100cm, substantially reduces steel cofferdam inside and outside steel cofferdam
Because of the impulsive force that inside and outside water-head is born, the reliability and stability of steel cofferdam are improved.
Brief description of the drawings
Fig. 1 is the implementing procedure figure of the Longkou closure construction method of the present invention.
Fig. 2 be the present invention on pull out the construction schematic diagram of method Longkou closure construction method.
Fig. 3 is the schematic diagram of weld seam leak stopping structure in the present invention.
Fig. 4 is the construction schematic diagram of gate method Longkou closure construction method in the present invention.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be with
More fully understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
As shown in figure 1, referring also to shown in Fig. 2, steel cofferdam Longkou closure construction method of the invention, including：
Step 101：A part of steel sheet pile 1 formation water conservancy diversion is pulled out on the side interval of steel cofferdam Longkou in the low tide period cross water and lead to
Road 2；
Step 102：The inserting piling steel sheet pile at Longkou；
Step 103：The inserting piling of steel sheet pile 1 pulled out by is to design altitude to reset；
Step 104：The inserting piling compartment stake between the steel sheet pile 1 of reset, and the jackstone in the compartment of formation, water is crossed by water conservancy diversion
Passage is blocked, and completes steel cofferdam Longkou closure construction.
Preferably, in the present embodiment, when pulling out a part of steel sheet pile on interval, one can be pulled out on a steel sheet pile
Steel sheet pile.Certainly, one can also be pulled out on two or more root steel sheet piles as needed.The width of the water conservancy diversion water passage
Degree is typically no less than 8 meters, and the height pulled out on steel sheet pile is 2.5-3.5 meters.It is further preferable that the height pulled out on steel sheet pile is 3 meters.
In the step 101, it is upper pull out the steel sheet pile 1 before, first can be pulled out on not in the middle part of steel sheet pile set fix
Pull bar 3.Also, in the step 101, hydraulic fill sand is extremely to -1.0m, in storehouse for blotter throwing on the outside of diversion section steel sheet pile
0.0m, inner side hydraulic fill sand is more than -1.0m.Water-head control is within ± 1.0m inside and outside steel cofferdam, diversion section gate current
Speed control is in 2.4m/s, and steel cofferdam safety coefficient is high.
In one embodiment, because diversion section steel sheet pile is blocked from ± 0.0 absolute altitude, it is then lifted out to+3.0 absolute altitudes, therefore
Then hydraulic reclamation is husky in diversion section storehouse carries out 160kn/ ㎡ geotextile layings to -0.5 absolute altitude, sand bed protection is carried out, then using sand
Bag suppression, reduces hydraulic reclamation sand drift and loses.In addition, being needed for construction, it is easy to hydraulic reclamation sand and jackstone in diversion section later stage storehouse, can first exists
Throwing rubble on the outside of storehouse；
After the step 101, with both sides steel sheet pile top corresponding section lock can also be opened up on the upper steel sheet pile pulled out
Button hole, docking is latched by latching by adjacent steel sheet pile.Correspondingly, after step 103, sealing is set at the bonnet lock hole
Part seals the bonnet lock hole.
Specifically, in one embodiment, diversion section is set to complete and be not required to install and pulled out on the inner side steel sheet pile of pull bar 3
6.3m is pulled out in 5.5m, outside plate stake, then inner side steel sheet pile carries out complete in+5.5 elevations, outside plate stake in+6.3 elevations
Block, then inserting piling is to designed elevation.Alternatively, it is also possible to which inner side steel sheet pile is high+6.3 in+5.5 elevations, outside plate stake
Cheng Jinhang lock cuttings, form bonnet lock hole, recover to designed elevation, when low tide, blocked at steel sheet pile lock.Cut entirely
Afterwards during steel sheet pile inserting piling, cutting of steel sheet pile lock in top needs again both sides lock docking, and difficulty of construction increases, therefore using lock
It is preferably to select that patterning method, which carries out construction,.
In addition, after diversion section steel sheet pile closes up and finished, released and welded with oxygen welding, steel sheet pile is pulled out by and is recovered to ± 0.0
Absolute altitude, carries out welding recovery.When welding recovery, weld seam leak stopping processing is the emphasis of steel cofferdam, and steel sheet pile cutting is recovering extremely
Welded after designed elevation, but water leakage situation is more serious, to reduce water percolating capacity, after the completion of steel sheet pile welding, using steel
Sheet pile weld seam both sides reinforce encapsulation process.Processing structure as shown in figure 3, sealed inside and outside weld seam 7 using rubber sheet gasket 5,
Then fixed using steel plate 4, steel plate is fixed using the both sides of nut 6, solve weld seam seepy question.
As shown in figure 4, being another embodiment of the off-lying sea without shielding steel cofferdam Longkou flow-guiding construction method of the present invention, this reality
Apply example and employ gate method formation water conservancy diversion water passage.Gate method off-lying sea is upper without shielding steel cofferdam Longkou flow-guiding construction method
Method off-lying sea is pulled out without the optimization carried out on the basis of the flow-guiding construction method of shielding steel cofferdam Longkou, specifically, pulling out the steel sheet pile 1 upper
Before, first will on the steel sheet pile 1 that pulls out blocked from bottom, after being pulled out on the steel sheet pile, form bar gate type water conservancy diversion water passage 2.
Enclosed without shielding steel cofferdam Longkou flow-guiding construction method without shielding steel relative to pulling out method off-lying sea on common gate method off-lying sea
Weir Longkou flow-guiding construction method, the advantage is that, can avoid the method for pulling out construction when because diversion section has thrown rubble, completely on
After pulling out, rubble slides, and the secondary inserting piling caused is difficult.Gate method off-lying sea without shielding steel cofferdam Longkou flow-guiding construction method due to
On pull out before steel sheet pile first to will on the steel sheet pile that pulls out blocked from bottom, the bottom of such steel sheet pile has been left in seabed,
, need not the inserting piling into the silt in seabed again when the steel sheet pile to above pulling out resets, it is only necessary to answered by steel sheet pile
Behind position, original part is welded with bottom.After steel sheet pile cutting, steel plate pile bearing capacity is still in scope of design.Lead
Stream section steel sheet pile has carried out consolidation process, and safety coefficient is high.
Embodiment described above is only the preferred embodiment to absolutely prove the present invention and being lifted, protection model of the invention
Enclose not limited to this.Equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is defined by claims.
Claims (10)
1. method off-lying sea is pulled out in one kind without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that including：
A, a part of steel sheet pile formation water conservancy diversion water passage is pulled out in the low tide period on the side interval of steel cofferdam Longkou；
B, the inserting piling steel sheet pile at Longkou；
C, the steel sheet pile inserting piling pulled out by are to design altitude to reset；
D, the inserting piling compartment stake between the steel sheet pile of reset, and the jackstone in the compartment of formation, water conservancy diversion water passage is blocked, complete
Into steel cofferdam Longkou closure construction.
2. method off-lying sea is pulled out on as claimed in claim 1 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that described
In step A, above pull out before the steel sheet pile, first will on the steel sheet pile that pulls out blocked from bottom, after being pulled out on the steel sheet pile, form lock
Gate-type water conservancy diversion water passage.
3. method off-lying sea is pulled out on as claimed in claim 1 or 2 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that
The width of the water conservancy diversion water passage is not less than 8 meters.
4. method off-lying sea is pulled out on as claimed in claim 1 or 2 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that
In the step A, the height pulled out on steel sheet pile is 2.5-3.5 meters.
5. method off-lying sea is pulled out on as claimed in claim 4 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that described
In step A, the height pulled out on steel sheet pile is 3 meters.
6. method off-lying sea is pulled out on as claimed in claim 1 or 2 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that
In the step A, when pulling out a part of steel sheet pile on interval, every pulling out a steel sheet pile on a steel sheet pile.
7. method off-lying sea is pulled out on as claimed in claim 1 or 2 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that
In the step A, it is upper pull out the steel sheet pile before, steady brace first is set in the middle part of the steel sheet pile that is pulled out on not.
8. method off-lying sea is pulled out on as claimed in claim 1 or 2 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that
In the step B, in Longkou, section and installs pull bar at the row's steel sheet pile of inserting piling two, shape between the backward two rows steel sheet pile of pull bar installation
Into compartment in jackstone and hydraulic reclamation it is husky, complete the closure of Longkou.
9. method off-lying sea is pulled out on as claimed in claim 1 or 2 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that
After the step A, bonnet lock hole is opened up with both sides steel sheet pile top corresponding section on the upper steel sheet pile pulled out, by latching phase
Adjacent steel sheet pile docking.
10. method off-lying sea is pulled out on as claimed in claim 9 without shielding steel cofferdam Longkou flow-guiding construction method, it is characterised in that institute
State after step C, set seal to seal the bonnet lock hole at the bonnet lock hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075497.2A CN105714837B (en) | 2016-02-03 | 2016-02-03 | Method off-lying sea is pulled out in one kind without shielding steel cofferdam Longkou flow-guiding construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075497.2A CN105714837B (en) | 2016-02-03 | 2016-02-03 | Method off-lying sea is pulled out in one kind without shielding steel cofferdam Longkou flow-guiding construction method |
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| CN105714837A CN105714837A (en) | 2016-06-29 |
| CN105714837B true CN105714837B (en) | 2017-10-20 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61286417A (en) * | 1985-06-12 | 1986-12-17 | Nippon Kokan Kk <Nkk> | Cofferdam structure |
| CN101748744B (en) * | 2008-12-19 | 2011-06-01 | 四川公路桥梁建设集团有限公司 | Asynchronous sinking construction method of separated steel cofferdam of large-scale bridge base |
| CN101892632B (en) * | 2009-05-19 | 2012-05-30 | 上海市基础工程有限公司 | Construction method of structural system of river under no-cutoff working condition |
| CN104452785B (en) * | 2014-11-06 | 2016-01-06 | 中铁十五局集团有限公司 | A kind of Larsen steel sheet-pile cofferdam closure construction method |
| CN204356792U (en) * | 2014-12-26 | 2015-05-27 | 长安大学 | The construction equipment of cofferdam, a kind of river water conservancy diversion |
| CN104805854B (en) * | 2015-04-29 | 2017-03-08 | 中铁四局集团第二工程有限公司 | A kind of Deep Water Ultra-long steel sheet pile cofferdam construction method under tide environment |
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Effective date of registration: 20230904 Address after: No. 139, Pingjiang Road, Xuhui District, Shanghai 200030 Patentee after: CCCC THIRD HARBOR ENGINEERING Co.,Ltd. Patentee after: NINGBO BRANCH, CCCC NO.3 HARBOR ENGINEERING CO.,LTD. Address before: No.462, Yanjiang East Road, Zhenhai District, Ningbo, Zhejiang 315000 Patentee before: NINGBO BRANCH, CCCC NO.3 HARBOR ENGINEERING CO.,LTD. |
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