CN110593285A - Plugging structure for underwater pouring foundation for double-wall steel cofferdam construction and construction method - Google Patents
Plugging structure for underwater pouring foundation for double-wall steel cofferdam construction and construction method Download PDFInfo
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- CN110593285A CN110593285A CN201910722315.XA CN201910722315A CN110593285A CN 110593285 A CN110593285 A CN 110593285A CN 201910722315 A CN201910722315 A CN 201910722315A CN 110593285 A CN110593285 A CN 110593285A
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- plugging
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- steel cofferdam
- wall steel
- pouring
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 111
- 239000010959 steel Substances 0.000 title claims abstract description 111
- 238000010276 construction Methods 0.000 title claims abstract description 52
- 238000007789 sealing Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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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)
- Environmental & Geological Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a plugging structure for an underwater pouring foundation for double-wall steel cofferdam construction and a construction method, and belongs to the technical field of design and manufacture of construction process equipment. The plugging structure and the construction method for the underwater pouring foundation for the double-wall steel cofferdam construction are low in manufacturing and construction cost and convenient to plug. The plugging structure comprises a double-wall steel cofferdam, and further comprises a guiding and fixing device and a plugging assembly, wherein the plugging assembly is detachably and fixedly arranged at the position of the bottom of the double-wall steel cofferdam needing sealing and plugging through the guiding and fixing device. The construction method includes the steps that the guide fixed guide rails are installed while the double-wall steel cofferdam is manufactured, and then the sealing plates are arranged at the corresponding pouring gaps through the guide fixed guide rails to seal the pouring gaps according to the found pouring gaps after the double-wall steel cofferdam is installed in place.
Description
Technical Field
The invention relates to a plugging structure, in particular to a plugging structure for an underwater pouring foundation in double-wall steel cofferdam construction, and belongs to the technical field of design and manufacture of construction process equipment. The invention also relates to a construction method for plugging the bottom of the double-wall steel cofferdam by adopting the plugging structure.
Background
With the development of national economy, the bridge industry in China is rapidly developed, the bridge design theory, construction technology and equipment in China are on the way or approach the world advanced level, and the construction of large-span bridges across the sea and the river is continuously increased. The method for constructing the underwater foundation of the main pier column in the channel by adopting the double-wall steel cofferdam becomes a main method for constructing the large-volume deepwater foundation of the modern large-span bridge. The double-wall steel cofferdam construction needs to adapt to special environments such as different geology, navigation conditions, water depth, foundation volume, river flow velocity and the like, under specific conditions, particularly under the conditions of deep water depth, large cased tank volume, guarantee of navigation, flood control and flood discharge, extremely high flow velocity and the like, the safety quality of design optimization, accurate sinking in place, tight bottom sealing, building of a drilling platform, large-volume concrete construction and the like is ensured, the progress needs to be accelerated, the construction cost is saved, the key of technical research of project managers and engineering technicians is provided, and the main attack direction of the large-span deep water bridge construction technical research is provided.
The prior patent technology with publication number CN107642101A and invented name as a construction method for sealing bottom and preventing water drainage of a rock riverbed steel cofferdam discloses a construction method capable of realizing the structure for sealing bottom and draining water of a double-wall steel cofferdam rock riverbed, but the patent technology has large steel consumption, can not effectively save cost, and simultaneously has large gap for sealing the bottom of the steel cofferdam, and is difficult to ensure the pouring quality of bottom sealing concrete, so that the construction method must adopt cement-water-glass double-slurry.
In view of the above, the research on the bottom sealing and plugging construction technology of the double-wall steel cofferdam has great guiding significance for the existing tools for bridge construction across sea, river and river.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the plugging structure for the underwater pouring foundation of the double-wall steel cofferdam construction is low in manufacturing and construction cost and convenient to plug. The invention also provides a construction method for plugging the bottom of the double-wall steel cofferdam by adopting the plugging structure.
The technical scheme adopted for solving the technical problems is as follows: a plugging structure for an underwater pouring foundation of double-wall steel cofferdam construction comprises a double-wall steel cofferdam, and further comprises a guide fixing device and a plugging component, wherein the plugging component is detachably and fixedly arranged at the position of the bottom of the double-wall steel cofferdam needing sealing and plugging through the guide fixing device.
Furthermore, the guiding and fixing device comprises a plurality of guiding and fixing guide rails, each guiding and fixing guide rail is in a T-shaped structure in the projection in the cross section of the guiding and fixing guide rail, the guiding and fixing guide rails are fixedly arranged on the double-wall steel cofferdam through the lower ends of the vertical edges of the T-shaped structure along the vertical direction at intervals, and the plugging components are detachably and fixedly arranged at the bottom position of the double-wall steel cofferdam needing sealing and plugging through two adjacent guiding and fixing guide rails respectively.
The preferable mode of the scheme is that the guide fixed guide rail of the T-shaped structure is formed by cutting I-shaped steel, the horizontal edge of the T-shaped structure is the flange of the I-shaped steel, and the vertical edge of the T-shaped structure is one part of an I-shaped steel web plate.
Furthermore, the guide fixed guide rail with the T-shaped structure is formed by welding two steel plates.
The preferable mode of the scheme is that the plugging assembly comprises a plurality of groups of plugging plates with the width matched with the track gauge of the two adjacent guide fixed guide rails, and each group of plugging plates is detachably and fixedly arranged at the bottom position of the double-wall steel cofferdam needing sealing and plugging through the two adjacent guide fixed guide rails at the corresponding positions.
Furthermore, the blocking plate is a steel template or a wood template or a steel blocking plate formed by spot welding a steel plate and a framework.
The construction method comprises the steps of manufacturing the double-wall steel cofferdam, installing the guide fixed guide rails, arranging the plugging plates to the corresponding pouring gaps through the guide fixed guide rails according to the found pouring gaps after the double-wall steel cofferdam is installed in place, and plugging the pouring gaps.
Further, the pouring gap is detected by a frogman or an underwater detector.
The invention has the beneficial effects that: according to the application, the plugging structure comprising the guide fixing device and the plugging assembly is arranged, and the plugging assembly is detachably and fixedly arranged at the position, needing sealing and plugging, of the bottom of the double-wall steel cofferdam through the guide fixing device. When the plugging structure is used for plugging a pouring gap at the bottom of the double-wall steel cofferdam, the following specific steps can be adopted, namely, the guiding fixing device formed by the guiding fixing guide rail is installed while the double-wall steel cofferdam is manufactured, and then the plugging assembly formed by the plugging plates is arranged at the corresponding pouring gap through the guiding fixing guide rail to plug the pouring gap according to the explored pouring gap after the double-wall steel cofferdam is installed in place. Therefore, the plugging structure guiding and fixing device is installed on the double-wall steel cofferdam in advance, then the plugging plate is arranged at the corresponding pouring gap through the guiding and fixing guide rail to plug the pouring gap according to the detected pouring gap after the double-wall steel cofferdam is installed in place, so that the purpose of plugging according to the actual working condition of the pouring gap is realized, a large number of cofferdam structures are not required to be manufactured like the existing steel cofferdam plugging, the manufacturing and construction cost can be effectively reduced, and in the specific plugging operation, the plugging plate can be conveniently arranged at the gap needing to be plugged through the guiding and fixing guide rail, so that the operation is very convenient and fast.
Drawings
FIG. 1 is a schematic view of a plugging structure for an underwater pouring foundation for double-wall steel cofferdam construction according to the present invention;
FIG. 2 is a schematic view of a plugging plate related to the plugging structure for the underwater pouring foundation of the double-wall steel cofferdam construction of the invention;
FIG. 3 is a schematic view of a pouring gap existing after the double-wall steel cofferdam according to the present invention is installed in place;
FIG. 4 is a process flow diagram relating to the inventive method.
Labeled as: the double-wall steel cofferdam comprises a double-wall steel cofferdam 1, a guide fixing device 2, a plugging component 3, a guide fixing guide rail 4, a plugging plate 5, a steel plate 6, a framework 7 and a pouring gap 8.
Detailed Description
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the invention provides a plugging structure for underwater pouring foundation of double-wall steel cofferdam construction, which has low manufacturing and construction cost and convenient plugging operation, and a construction method for plugging the bottom of the double-wall steel cofferdam by using the plugging structure. The plugging structure comprises a double-wall steel cofferdam 1, and further comprises a guiding and fixing device 2 and a plugging component 3, wherein the plugging component 3 is detachably and fixedly arranged at the bottom position of the double-wall steel cofferdam 1 needing sealing and plugging through the guiding and fixing device 2. According to the construction method, the guide fixed guide rails 4 are installed while the double-wall steel cofferdam 1 is manufactured, and then the sealing plates 5 are arranged at the corresponding pouring gaps through the guide fixed guide rails 4 to seal the pouring gaps 8 according to the found pouring gaps 8 after the double-wall steel cofferdam 1 is installed in place. According to the application, a plugging structure comprising a guiding and fixing device 2 and a plugging component 3 is arranged, and the plugging component 3 is detachably and fixedly arranged at the bottom position of the double-wall steel cofferdam 1 needing sealing and plugging through the guiding and fixing device 2. When the plugging structure is used for plugging a pouring gap at the bottom of a double-wall steel cofferdam, the following specific steps can be adopted, namely, the guiding fixing device 2 of the guiding fixed guide rail 4 is installed while the double-wall steel cofferdam 1 is manufactured, and then the plugging plate 5 forming the plugging component 3 is arranged to the corresponding pouring gap 8 through the guiding fixed guide rail 4 to plug the pouring gap 8 according to the probed pouring gap 8 after the double-wall steel cofferdam 1 is installed in place. In this way, the plugging structure guiding and fixing device 2 is installed on the double-wall steel cofferdam 1 in advance, then the plugging plate 5 is arranged at the corresponding pouring gap 8 to plug the pouring gap 8 through the guiding and fixing guide rail 4 according to the found pouring gap 8 after the double-wall steel cofferdam 1 is installed in place, so that the purpose of plugging according to the actual working condition of the pouring gap 8 is realized, a large number of cofferdam structures are not required to be manufactured like the existing steel cofferdam plugging, the manufacturing and construction cost can be effectively reduced, and in the specific plugging operation, the plugging plate can be conveniently arranged at the gap needing to be plugged through the guiding and fixing guide rail, so that the operation is very convenient and fast.
In the above embodiment, the guiding and fixing device 2 may have various structures, such as a fixed guiding and clamping set arranged at the lower part of the double-wall steel cofferdam 1, which does not utilize the real-time installation of the later plugging component 3. Therefore, the guiding and fixing device 2 is set to be of a structure comprising a plurality of guiding and fixing guide rails 4, the projection of each guiding and fixing guide rail 4 in the cross section of the guiding and fixing guide rail is of a T-shaped structure, then when the double-wall steel cofferdam 1 is manufactured, each guiding and fixing guide rail 4 is fixedly arranged on the double-wall steel cofferdam 1 along the vertical direction with a gap, and after the double-wall steel cofferdam 1 is sunken and arranged in place, the plugging component 3 is fixedly arranged at the bottom position of the double-wall steel cofferdam 1 needing sealing and plugging through two adjacent guiding and fixing guide rails 4 in a detachable mode. Further, in order to facilitate the manufacturing of the guide fixed guide rail 4, the guide fixed guide rail 4 of the T-shaped structure can be formed by cutting i-shaped steel, at this time, the horizontal edge of the T-shaped structure is the flange of the i-shaped steel, and the vertical edge of the T-shaped structure is a part of the web of the i-shaped steel; of course, the fixed guide rail 4 with the T-shaped structure may be formed by welding two steel plates.
Correspondingly, the plugging assembly 3 comprises plugging plates 5 with multiple groups of widths and suitable for the track pitches of two adjacent guide fixed guide rails 4, each group of the plugging plates 5 is fixed at the bottom of the double-wall steel cofferdam 1 needing sealing and plugging through the two adjacent guide fixed guide rails 4 which correspond to the positions. In this case, the plugging plate 5 may be a steel template, a wood template, or a steel plugging plate formed by spot welding a steel plate 6 and a frame 7.
According to the concrete condition of construction sound, the pouring gap 8 can be detected by frogman or underwater detector.
To sum up, the technical scheme that this application provided has solved the waterproof leaking stoppage problem of deep water steel cofferdam back cover, has reduced the construction degree of difficulty, has the maneuverability strong, and the diver need not go to the underwater and carries out the leaking stoppage, and general constructor can directly accomplish the leaking stoppage problem of steel cofferdam on the surface of water. Meanwhile, the method saves the consumption of steel and effectively saves the cost. The construction method is confirmed on site that the sealing baffle completely meets the pouring requirement of the bottom sealing concrete after the construction of the sealing baffle is finished.
Example one
The plugging structure and the construction method thereof are specifically described below by taking a steel cofferdam lower hanging bracket rear-pulling rectangular component as an example, the whole process is shown in figure 4,
A. the double-wall steel cofferdam is assembled at the first section on the temporary assembled bracket according to the conventional assembling method, as shown in figure 1;
B. cutting the 16I-steel by using a semi-automatic flame cutting machine to form a slide rail, namely a T-shaped component required by the guide fixed guide rail 4;
C. arranging T-shaped components at equal intervals along the outer wall of the double-wall steel cofferdam to form a slide rail of the steel baffle plate, namely the guide fixing device 2, as shown in figure 1;
D. the T-shaped components are arranged on each steel cofferdam section to form a full-length steel baffle slide rail from the bottom end of the steel cofferdam to the water surface end, as shown in figure 1;
E. determining the width of a plugging baffle plate, namely the width of the plugging plate, according to the distance between the T-shaped members, determining the height of the plugging baffle plate according to the depth size of the gap, forming the framework 7 by adopting 75mm angle steel as a reverse sliding rail and a stiffening plate, and then manufacturing the plugging baffle plate by adopting a steel plate with the thickness of 20mm, the stiffening plate and the reverse sliding rail, as shown in FIG. 2;
F. the diver surveys the bottom end leak of the steel cofferdam after being put in place, and determines the position and the size of the leak, as shown in figure 3;
G. inserting the plugging baffle into the bottom end of the steel cofferdam along the T-shaped member slide rail, and plugging the leak at the bottom end of the steel cofferdam, as shown in figure 4;
H. and sequentially completing the insertion of the plugging baffle at the leak to form a plugging partition at the bottom end of the steel cofferdam, and pouring bottom sealing concrete, as shown in figure 4.
Claims (8)
1. The utility model provides a block structure that is used for double-walled steel cofferdam construction to pour basis under water, includes double-walled steel cofferdam (1), its characterized in that: the plugging structure further comprises a guiding and fixing device (2) and a plugging component (3), wherein the plugging component (3) is detachably and fixedly arranged at the bottom position of the double-wall steel cofferdam (1) needing sealing and plugging through the guiding and fixing device (2).
2. The plugging structure for the underwater pouring foundation of the double-wall steel cofferdam construction according to claim 1, wherein: the guide fixing device (2) comprises a plurality of guide fixing guide rails (4), the guide fixing guide rails (4) are in a T-shaped structure in projection in the cross section of the guide fixing device, the guide fixing guide rails (4) are fixedly arranged on the double-wall steel cofferdam (1) along the vertical direction at intervals, and the plugging components (3) are detachably and fixedly arranged at the bottom of the double-wall steel cofferdam (1) needing sealing and plugging through two adjacent guide fixing guide rails (4).
3. The plugging structure for the underwater pouring foundation of the double-wall steel cofferdam construction according to claim 2, wherein: the guide fixed guide rail (4) of the T-shaped structure is formed by cutting I-shaped steel, the horizontal edge of the T-shaped structure is the flange of the I-shaped steel, and the vertical edge of the T-shaped structure is a part of the web plate of the I-shaped steel.
4. The plugging structure for the underwater pouring foundation of the double-wall steel cofferdam construction according to claim 2, wherein: the guide fixed guide rail (4) of the T-shaped structure is formed by welding two steel plates.
5. The plugging structure for the underwater pouring foundation of the double-wall steel cofferdam construction according to any one of claims 2 to 4, wherein: the plugging assembly (3) comprises a plurality of groups of plugging plates (5) with the width matched with the track pitch of two adjacent guide fixed guide rails (4), and each group of plugging plates (5) is detachably and fixedly arranged at the bottom position of the double-wall steel cofferdam (1) needing sealing and plugging through the two adjacent guide fixed guide rails (4) at the corresponding positions.
6. The plugging structure for the underwater pouring foundation of the double-wall steel cofferdam construction according to claim 5, wherein: the blocking plate (5) is a steel template or a wood template or a steel blocking plate formed by spot welding a steel plate (6) and a framework (7).
7. A construction method for plugging a pouring gap at the bottom of a double-wall steel cofferdam by adopting the plugging structure of claim 6 is characterized in that: the construction method includes the steps that the guide fixed guide rails (4) are installed while the double-wall steel cofferdam (1) is manufactured, then the sealing plates (5) are arranged to the corresponding pouring gaps through the guide fixed guide rails (4) to seal the pouring gaps (8) according to the found pouring gaps (8) after the double-wall steel cofferdam (1) is installed in place.
8. The construction method according to claim 7, wherein: the pouring gap (8) is probed by a frogman or an underwater detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910722315.XA CN110593285A (en) | 2019-08-06 | 2019-08-06 | Plugging structure for underwater pouring foundation for double-wall steel cofferdam construction and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910722315.XA CN110593285A (en) | 2019-08-06 | 2019-08-06 | Plugging structure for underwater pouring foundation for double-wall steel cofferdam construction and construction method |
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| Publication Number | Publication Date |
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| CN110593285A true CN110593285A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910722315.XA Pending CN110593285A (en) | 2019-08-06 | 2019-08-06 | Plugging structure for underwater pouring foundation for double-wall steel cofferdam construction and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718807A (en) * | 2021-09-03 | 2021-11-30 | 安徽省公路桥梁工程有限公司 | Combined steel cofferdam structure with adjustable bottom and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116032A (en) * | 2010-12-31 | 2011-07-06 | 中铁大桥局集团第四工程有限公司 | Method for closing bottom of steel boxed cofferdam and gaps among river beds |
| CN202039374U (en) * | 2011-04-29 | 2011-11-16 | 中铁十九局集团第一工程有限公司 | Counterbore sleeve box cofferdam |
| CN203066059U (en) * | 2012-12-18 | 2013-07-17 | 华侨大学 | Steel sheet pile leakage-proof device |
| JP2014015809A (en) * | 2012-07-11 | 2014-01-30 | Okumura Corp | Cut-off of water for joint part of steel sheet pile, and outflow prevention hardware |
| CN206625245U (en) * | 2017-03-17 | 2017-11-10 | 刘红森 | A kind of water conservancy construction cofferdam device |
-
2019
- 2019-08-06 CN CN201910722315.XA patent/CN110593285A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116032A (en) * | 2010-12-31 | 2011-07-06 | 中铁大桥局集团第四工程有限公司 | Method for closing bottom of steel boxed cofferdam and gaps among river beds |
| CN202039374U (en) * | 2011-04-29 | 2011-11-16 | 中铁十九局集团第一工程有限公司 | Counterbore sleeve box cofferdam |
| JP2014015809A (en) * | 2012-07-11 | 2014-01-30 | Okumura Corp | Cut-off of water for joint part of steel sheet pile, and outflow prevention hardware |
| CN203066059U (en) * | 2012-12-18 | 2013-07-17 | 华侨大学 | Steel sheet pile leakage-proof device |
| CN206625245U (en) * | 2017-03-17 | 2017-11-10 | 刘红森 | A kind of water conservancy construction cofferdam device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718807A (en) * | 2021-09-03 | 2021-11-30 | 安徽省公路桥梁工程有限公司 | Combined steel cofferdam structure with adjustable bottom and construction method thereof |
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Application publication date: 20191220 |
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