CN105586977A - Method for diversion construction of closure gap of steel cofferdam under open sea unshielded condition by down-penetrating method - Google Patents
Method for diversion construction of closure gap of steel cofferdam under open sea unshielded condition by down-penetrating method Download PDFInfo
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- CN105586977A CN105586977A CN201610075568.9A CN201610075568A CN105586977A CN 105586977 A CN105586977 A CN 105586977A CN 201610075568 A CN201610075568 A CN 201610075568A CN 105586977 A CN105586977 A CN 105586977A
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- steel sheet
- longkou
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- sheet pile
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a method for the diversion construction of a closure gap of a steel cofferdam under an open sea unshielded condition by a down-penetrating method. The method comprises the following steps: A, driving parts of steel sheet piles on one side of the closure gap of the steel cofferdam in the low-tide period to be lower than a prescribed value to form a diversion overflow passage; B, penetrating and driving the steel sheet piles at the closure gap till completing the closing of the closure gap; C, pulling up the steel sheet piles forming the diversion overflow passage to the design elevation to reset the steel sheet piles; and D, penetrating and driving compartment piles between the reset steel sheet piles, riprapping rocks in formed compartments, and cutting off the diversion overflow passage, so as to complete the closing construction of the closure gap of the steel cofferdam. The method has the advantages that the diversion closing construction of the closure gap of the steel cofferdam is realized under the open sea unshielded condition; the construction is simple and fast, and the construction efficiency is high; the diversion effect is good, and the security coefficient of the steel cofferdam is high; and the steel sheet piles are constructed at the low-tide level when being welded by a platform construction method, so that the construction security coefficient is high.
Description
Technical field
The present invention relates to steel cofferdam construction technology, specifically, is that a kind of lower slotting method off-lying sea is without shielding steel cofferdam Longkou flow-guiding construction method.
Background technology
Cushion cap in deep water foundation generally adopts " cofferdam method " construction, utilize cofferdam to create the working space of a dry construction bearing platform, and steel cofferdam is a kind of conventional cofferdam. In the time carrying out cofferdam construction, need to close up Longkou in the final stage of construction. And in the time constructing, being subject to the impact in monsoon, typhoon, greasy weather and the impact of flood tide at sea, tidal range is large. It is larger that large flood tide is surged period, and duration of tide is very fast, and in steel sheet pile Longkou closes up, because of affected by tidewater, the low tide time is shorter, and Longkou closes up the time can wretched insufficiency, causes very big difficulty to the closure construction of steel cofferdam Longkou.
Especially, in the time carrying out offshore construction, because cofferdam inner area is large, the water-head producing in the seawater fluctuation time of tide can cause great pressure to steel cofferdam, and the current that water-head causes all will flow into from Longkou or flow out, this can close up and bring great difficulty to Longkou. In addition, offshore construction also has following problem: (1), because off-lying sea is without the operation of shielding isolated island, execution conditions are arduous, and difficulty of construction is large; (2) stormy waves is more, and the engineering time is limited, need before typhoon arrives, complete again, and the duration is tight; (3) position influence that makes moist, the inside and outside water-head of steel cofferdam is in ± 3.0m left and right, and closures current is rapid, and it is large that Longkou closes up difficulty; (4) along with the closure gradually of diversion section, delivery port reduces, and flow rate of water flow can increase; The turbulent river crashes its way through, and scouring sediment affects platform stable, critical workmen's safety.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of lower slotting method off-lying sea without shielding steel cofferdam Longkou flow-guiding construction method, is applicable to carry out Longkou water conservancy diversion construction under the unprotected condition in off-lying sea, and construction is simple rapidly, efficiency is high.
In order to solve the problems of the technologies described above, the invention provides a kind of lower slotting method off-lying sea without shielding steel cofferdam Longkou flow-guiding construction method, comprising:
A, in the low tide period, the part steel sheet pile of steel cofferdam Longkou one side is beaten low, form water conservancy diversion cross aquaporin;
B, at Longkou place inserted to play steel sheet pile, until complete the closure of Longkou;
C, pull up to design altitude to reset forming the steel sheet pile that water conservancy diversion crosses aquaporin;
D, reset steel sheet pile between the stake of inserted to play compartment, and form compartment in jackstone, water conservancy diversion is crossed to aquaporin and blocks, complete steel cofferdam Longkou closure construction.
Further, in described steps A, described steel sheet pile is beaten to be low to moderate ± 0.0m elevation, form comb-shape structure.
Further, the width that described water conservancy diversion is crossed aquaporin is not less than 8 meters.
Further, in described step B, arrange steel sheet pile and pull bar is installed in Longkou section inserted to play two.
Further, in described step B, jackstone and hydraulic reclamation sand in the compartment forming between backward two the row's steel sheet piles of pull bar installation, complete the closure of Longkou.
Further, in described step B, with shaped steel by steel sheet pile good Longkou place inserted to play and steel platform welding reinforce into entirety.
Further, in described part A, described steel sheet pile is played the steel sheet pile gradual change at the two ends of lower part and is beaten high.
Further, in described steps A, adopt ship play steel sheet pile to be beaten low.
Further, in described steps A, adopt platform construction method steel sheet pile to be beaten low. .
The water conservancy diversion closure construction to steel cofferdam Longkou under the unprotected condition in off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, has been realized in lower slotting method of the present invention off-lying sea, and construction is simple rapidly, efficiency is high. This construction method water conservancy diversion is effective, and steel cofferdam safety coefficient is higher; And in the time adopting the construction of steel sheet pile platform construction method, when welding, construct at low tide, construction safety coefficient is high.
Brief description of the drawings
Fig. 1 is the implementing procedure figure of lower slotting method of the present invention off-lying sea without shielding steel cofferdam Longkou flow-guiding construction method.
Fig. 2 is the construction schematic diagram of lower slotting method of the present invention off-lying sea without shielding steel cofferdam Longkou flow-guiding construction method.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described so that those skilled in the art the present invention may be better understood and can be implemented, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, simultaneously referring to Fig. 2, steel cofferdam of the present invention Longkou closure construction method, comprising:
Step 101: in the low tide period, 1 of the part steel plate of steel cofferdam Longkou one side is beaten low, form water conservancy diversion cross aquaporin 2;
Step 102: at Longkou place inserted to play steel sheet pile, until complete the closure of Longkou;
Step 103: the steel sheet pile 1 of formation water conservancy diversion being crossed to aquaporin 2 pulls up to design altitude to reset;
Step 104: reset steel sheet pile 1 between the stake of inserted to play compartment, and form compartment in jackstone, water conservancy diversion is crossed to aquaporin and blocks, complete steel cofferdam Longkou closure construction.
Preferably, in step 101, described steel sheet pile is beaten to be low to moderate ± 0.0m elevation, form comb-shape structure; The width that described water conservancy diversion is crossed aquaporin is generally not less than 8 meters.
In described step 102, arrange steel sheet pile in Longkou section inserted to play two, after the complete steel sheet pile of inserted to play, pull bar is installed on steel sheet pile, jackstone and hydraulic reclamation sand in the compartment forming between backward two the row's steel sheet piles of pull bar installation, complete the closure of Longkou. Preferably, for guaranteeing that single steel sheet pile 1 does not produce distortion before closure under current back and forth wash away, can also steel sheet pile good Longkou place inserted to play and steel platform welding be reinforced into entirety with shaped steel.
In described step 101, the steel sheet pile gradual change that described steel sheet pile is beaten the two ends of lower part is beaten high, is connected with the steel sheet pile at two ends. Moreover, in described step 101, can adopt ship play that steel sheet pile is beaten low, also can adopt platform construction method that steel sheet pile is beaten low.
The water conservancy diversion closure construction to steel cofferdam Longkou under the unprotected condition in off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, has been realized in lower slotting method of the present invention off-lying sea, and construction is simple rapidly, efficiency is high. This construction method water conservancy diversion is effective, and steel cofferdam safety coefficient is higher; And in the time adopting the construction of steel sheet pile platform construction method, when welding, construct at low tide, construction safety coefficient is high. In the situation that ensureing safety, progress, lower slotting method of the present invention off-lying sea is the most obvious without shielding steel cofferdam Longkou flow-guiding construction method water conservancy diversion effect.
The above embodiment is only the preferred embodiment for absolutely proving that the present invention lifts, and protection scope of the present invention is not limited to this. What those skilled in the art did on basis of the present invention is equal to alternative or conversion, all within protection scope of the present invention. Protection scope of the present invention is as the criterion with claims.
Claims (9)
1. under, insert method off-lying sea without a shielding steel cofferdam Longkou flow-guiding construction method, it is characterized in that, comprising:
A, in the low tide period, the part steel sheet pile of steel cofferdam Longkou one side is beaten low, form water conservancy diversion cross aquaporin;
B, at Longkou place inserted to play steel sheet pile, until complete the closure of Longkou;
C, pull up to design altitude to reset forming the steel sheet pile that water conservancy diversion crosses aquaporin;
D, reset steel sheet pile between the stake of inserted to play compartment, and form compartment in jackstone, water conservancy diversion is crossed to aquaporin and blocks, complete steel cofferdam Longkou closure construction.
2. lower slotting method as claimed in claim 1 off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, is characterized in that, in described steps A, described steel sheet pile is beaten to be low to moderate ± 0.0m elevation, forms comb-shape structure.
3. lower slotting method as claimed in claim 1 off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, is characterized in that, the width that described water conservancy diversion is crossed aquaporin is not less than 8 meters.
4. lower slotting method as claimed in claim 1 off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, is characterized in that, in described step B, arranges steel sheet pile and pull bar is installed in Longkou section inserted to play two.
5. lower slotting method as claimed in claim 4 off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, is characterized in that, in described step B, jackstone and hydraulic reclamation sand in the compartment forming between backward two the row's steel sheet piles of pull bar installation, complete the closure of Longkou.
6. the lower slotting method off-lying sea as described in claim 4 or 5, without shielding steel cofferdam Longkou flow-guiding construction method, is characterized in that, in described step B, steel sheet pile good Longkou place inserted to play and steel platform welding is reinforced into entirety with shaped steel.
7. lower slotting method as claimed in claim 1 off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, is characterized in that, in described part A, described steel sheet pile is played the steel sheet pile gradual change at the two ends of lower part and beaten high.
8. lower slotting method as claimed in claim 1 off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, is characterized in that, in described steps A, adopts ship play steel sheet pile to be beaten low.
9. lower slotting method as claimed in claim 1 off-lying sea, without shielding steel cofferdam Longkou flow-guiding construction method, is characterized in that, in described steps A, adopts platform construction method steel sheet pile to be beaten low.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075568.9A CN105586977B (en) | 2016-02-03 | 2016-02-03 | A kind of underthrust method off-lying sea is without shielding steel cofferdam Longkou flow-guiding construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610075568.9A CN105586977B (en) | 2016-02-03 | 2016-02-03 | A kind of underthrust method off-lying sea is without shielding steel cofferdam Longkou flow-guiding construction method |
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| CN105586977A true CN105586977A (en) | 2016-05-18 |
| CN105586977B CN105586977B (en) | 2017-08-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61286417A (en) * | 1985-06-12 | 1986-12-17 | Nippon Kokan Kk <Nkk> | Cofferdam structure |
| CN101748744A (en) * | 2008-12-19 | 2010-06-23 | 四川公路桥梁建设集团有限公司 | Asynchronous sinking construction method for large bridge foundation separation type steel cofferdam |
| CN101892632A (en) * | 2009-05-19 | 2010-11-24 | 上海市基础工程公司 | Construction method of structural system of river under no-cutoff working condition |
| CN104452785A (en) * | 2014-11-06 | 2015-03-25 | 中铁十五局集团有限公司 | Larsen steel sheet pile cofferdam folding 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 |
| CN104805854A (en) * | 2015-04-29 | 2015-07-29 | 中铁四局集团第二工程有限公司 | Method for constructing deep-water ultra-long steel plate pile cofferdam in tide environment |
-
2016
- 2016-02-03 CN CN201610075568.9A patent/CN105586977B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61286417A (en) * | 1985-06-12 | 1986-12-17 | Nippon Kokan Kk <Nkk> | Cofferdam structure |
| CN101748744A (en) * | 2008-12-19 | 2010-06-23 | 四川公路桥梁建设集团有限公司 | Asynchronous sinking construction method for large bridge foundation separation type steel cofferdam |
| CN101892632A (en) * | 2009-05-19 | 2010-11-24 | 上海市基础工程公司 | Construction method of structural system of river under no-cutoff working condition |
| CN104452785A (en) * | 2014-11-06 | 2015-03-25 | 中铁十五局集团有限公司 | Larsen steel sheet pile cofferdam folding 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 |
| CN104805854A (en) * | 2015-04-29 | 2015-07-29 | 中铁四局集团第二工程有限公司 | Method for constructing deep-water ultra-long steel plate pile cofferdam in tide environment |
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| CN105586977B (en) | 2017-08-25 |
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Effective date of registration: 20230911 Address after: 200032 No. 139, Xuhui District, Shanghai, Pingjiang Road 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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