CN115341562A - Underwater cofferdam structure and construction method thereof - Google Patents
Underwater cofferdam structure and construction method thereof Download PDFInfo
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- CN115341562A CN115341562A CN202211040102.7A CN202211040102A CN115341562A CN 115341562 A CN115341562 A CN 115341562A CN 202211040102 A CN202211040102 A CN 202211040102A CN 115341562 A CN115341562 A CN 115341562A
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- 238000010276 construction Methods 0.000 title claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 134
- 239000010959 steel Substances 0.000 claims abstract description 134
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 abstract description 15
- 238000004364 calculation method Methods 0.000 abstract description 7
- 238000003466 welding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
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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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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Abstract
The invention discloses an underwater cofferdam structure and a construction method thereof, wherein the integral stability of a combined pile of a positioning steel pipe pile, a steel sheet pile and a reinforcing pile is adopted, all accumulated water in the cofferdam can be removed at one time after the cofferdam is integrally finished, and the deformation of the cofferdam is monitored and measured in the process to guide construction, so that the construction process is simplified, the construction efficiency is improved, and the construction time is shortened. According to the underwater cofferdam structure, the stress calculation is carried out through the construction of the combined cofferdam piles, the strength and the rigidity of the combined piles are greatly increased compared with those of a single steel sheet pile, the deformation resistance is improved, the deformation is smaller under the premise of unchanging stress according to the calculation, the number of cofferdam supports is reduced, the spacing height of the cofferdam supports is increased, the working procedures are reduced, the time is shortened, and the cost investment is reduced. The invention solves the problems of lower construction efficiency, complex construction process and increased construction period of the existing steel sheet pile cofferdam construction.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to an underwater cofferdam structure and a construction method thereof.
Background
For the construction of the steel sheet pile cofferdam in the deep water area in the construction of the large bridge, the traditional construction method is to use the steel sheet piles to jump at intervals to drive the positioning piles. Set up interim guider before inserting and beat the steel sheet pile, treat that the steel sheet pile is inserted and beat closed back, adopt by last to the lower direction, draw water and install first layer and enclose the purlin support under the first layer supports, draw water again and install the second layer and enclose the purlin support, from top to bottom the layering installation cofferdam and bracing piece. The steel sheet pile is along with the process of pumping water, and the deformation is accumulated gradually and is increased, and the internal force increases, for the deformation and the internal force of its in-process steel sheet pile that pumps water of control, generally adopts to encrypt the mode that sets up purlin braced system. This has just led to enclosing purlin to support more, the crisscross complicacy of construction process, construction cycle length, and cofferdam deformation causes overall stability poor, has certain safe risk.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
In order to overcome the defects in the prior art, the underwater cofferdam structure and the construction method thereof are provided so as to solve the problems of low construction efficiency, complex construction process and construction period increase in the construction of the conventional steel sheet pile cofferdam.
In order to realize the aim, the construction method of the underwater cofferdam structure comprises the following steps:
a plurality of positioning steel pipe piles are arranged at intervals along the outer contour line of the underwater cofferdam structure;
the upper parts of the inner sides of the positioning steel pipe piles are detachably provided with guide ring beams;
driving a steel sheet pile between two adjacent positioning steel pipe piles, so that the steel sheet pile is tied between the two adjacent positioning steel pipe piles and is attached to the guide ring beam;
inserting reinforcing piles into the vertical through grooves in the inner sides of the steel sheet piles, so that the upper ends of the reinforcing piles are pressed against the guide ring beams;
installing a first purlin on the upper parts of the inner sides of the positioning steel pipe piles and the steel sheet piles, wherein the first purlin is provided with a circle along the outer contour line, and a plurality of purlins are arranged at intervals in the vertical direction;
arranging an inner support on the inner side of the first purlin, so that the inner support is supported on the inner side of the first purlin;
accumulated water on the inner side of the steel sheet pile is drained at one time;
after the accumulated water is discharged, installing other paths of purlins at the lower parts of the inner sides of the positioning steel pipe piles and the steel sheet piles, and enabling the paths of purlins to be arranged at intervals in the vertical direction;
and arranging inner supports on the inner sides of the other enclosing purlins to form an underwater cofferdam structure, so that the inner supports are supported on the inner sides of the other enclosing purlins.
The invention provides an underwater cofferdam structure, comprising:
the positioning steel pipe piles are arranged at intervals along the outer contour line of the underwater cofferdam structure, and guide ring beams are detachably arranged at the upper parts of the inner sides of the positioning steel pipe piles;
the steel sheet piles are tied between two adjacent positioning steel pipe piles and attached to the guide ring beam, reinforcing piles are inserted into the vertical through grooves in the inner sides of the steel sheet piles, and the upper ends of the reinforcing piles are pressed against the guide ring beam;
the enclosing purlins are arranged on the inner sides of the positioning steel pipe piles and the steel sheet piles and are arranged in circles along the outer contour line, and the enclosing purlins are arranged at intervals in the vertical direction; and
and the inner side of each purlin is provided with the inner support.
Furthermore, the number of the vertical through grooves on the inner side of the steel sheet pile is multiple, the vertical through grooves are arranged along the length direction of the steel sheet pile, and the reinforcing piles are arranged at intervals.
Furthermore, the pile bottom elevation of the reinforcing pile is smaller than the pile bottom elevation of the steel sheet pile.
Further, the reinforcing pile is an I-shaped steel pile.
Furthermore, the inner support comprises a transverse support, a vertical support and an inclined support, the transverse support is supported between two opposite sides of the inner side of each enclosing purlin, the inclined support is supported at the corner of each enclosing purlin, and the vertical support is supported and connected between the upper and lower adjacent enclosing purlins.
Furthermore, a bearing piece is hung at the upper end of the positioning steel pipe pile, a limiting through groove is formed in the bearing piece, and the guide ring beam is embedded in the limiting through grooves of the bearing pieces of the positioning steel pipe pile.
The underwater cofferdam structure has the advantages that the integral stability of the combined pile of the positioning steel pipe pile, the steel sheet pile and the reinforcing pile is adopted, all accumulated water in the cofferdam can be removed at one time after the cofferdam is integrally finished, the deformation of the cofferdam is monitored and measured in the process to guide construction, the construction process is simplified, the construction efficiency is improved, and the construction time is shortened. According to the underwater cofferdam structure, the stress calculation is carried out through the construction of the combined cofferdam piles, the strength and the rigidity of the combined piles are greatly increased compared with those of a single steel sheet pile, the deformation resistance is improved, the deformation is smaller under the premise of unchanging stress according to the calculation, the number of cofferdam supports is reduced, the spacing height of the cofferdam supports is increased, the working procedures are reduced, the time is shortened, and the cost investment is reduced. The underwater cofferdam structure of the invention has the advantages of accurate positioning of the steel sheet piles, tight connection, optimization of the combined piles, improved sealing performance, reduced leakage and improved construction safety.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of an underwater cofferdam structure according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of corners of the underwater cofferdam structure according to the embodiment of the present invention.
Fig. 3 is a sectional view of the underwater cofferdam structure of the embodiment of the present invention.
Fig. 4 isbase:Sub>A cross-sectional view taken atbase:Sub>A-base:Sub>A in fig. 3.
Fig. 5 is a schematic structural view of a positioning steel pipe pile according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a connector for positioning a steel pipe pile according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a connection node between a positioning steel pipe pile and a steel sheet pile according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 5, the present invention provides an underwater cofferdam structure including: a plurality of positioning steel pipe piles 1, steel sheet piles 2, a plurality of purlins 3 and inner supports.
A plurality of positioning steel pipe piles 1 are arranged at intervals along the outer contour line of the underwater cofferdam structure. A guide ring beam 13 is detachably mounted on the upper part of the inner side of the plurality of positioning steel pipe piles 1.
The steel sheet pile 2 is tied between two adjacent positioning steel pipe piles 1 and attached to the guide ring beam 13. And a reinforcing pile 21 is inserted in the vertical through groove at the inner side of the steel sheet pile 2. The upper ends of the reinforcing piles 21 are pressed against the guide ring beam 13.
In the present embodiment, the number of the vertical through-grooves on the inner side of the steel sheet pile 2 is plural. A plurality of vertical logical grooves set up along steel sheet pile 2's length direction.
The reinforcing piles 21 are arranged at intervals. The pile bottom elevation of the reinforcing pile 21 is smaller than the pile bottom elevation of the steel sheet pile 2.
In a preferred embodiment, the reinforcing piles 21 are i-shaped steel piles.
Enclosing purlin 3 is installed in the inboard of many location steel-pipe pile 1 and steel sheet pile 2. The purlin 3 sets up the round along the outer contour line. And a plurality of surrounding purlins 3 are arranged at intervals along the vertical direction. Specifically, the circumferential surface of the positioning steel pipe pile is provided with a bracket 12. The purlin is fixedly arranged on the bracket.
And a bearing part 11 is hung at the upper end of the positioning steel pipe pile 1. The supporting piece is positioned right above the bracket. The supporting piece 11 is formed with a limiting through groove. The guide ring beam 13 is embedded in the limiting through groove of the bearing piece 11 of the plurality of positioning steel pipe piles 1.
In this embodiment, an inner support is provided on the inner side of each purlin 3. Specifically, the inner support includes a lateral support 41, a vertical support 42, and an oblique support 43.
Referring to fig. 2 and 3, each purlin 3 has lateral braces 41 supported between opposite sides of the inside thereof. Diagonal braces 43 are supported at the corners of each purlin 3. Vertical supports 42 are supported and connected between the upper and lower adjacent purlins 3.
Referring to fig. 6 and 7, the steel pipe pile is welded with a connector 14 for connecting steel sheet piles. The connecting piece 14 for positioning the steel pipe pile is processed into a groove by adopting a material which is the same as that of the steel plate pile, so that the same rigidity and strength are ensured, unbalanced and uneven variables are not generated due to the bending tensile strength and the elastic modulus of the material, and the integral deformation and stability are ensured. The processing size of the connecting piece is matched with the size of the steel sheet pile, so that the connecting piece can be tightly connected during connection, the gap control leakage of the twisting seam is mainly guaranteed, and the compactness is improved.
The bracket on the positioning steel pipe pile is formed by welding a steel plate with the thickness of 20mm in advance in a steel bar processing field, the grade of the selected material can be properly improved so as to improve the bearing capacity of a welding point, and the position of the bracket is determined according to the driving depth and the layered supporting height of the steel plate pile.
The bearing piece is used for connecting the positioning steel pipe pile and the guide ring beam. The upper end of the bearing piece is hung at the top end of the positioning steel pipe pile and is fixed by means of self weight and load stress of the guide ring beam, and the lower end of the bearing piece forms a limiting through groove for placing the guide ring beam. The upper end of the bearing piece forms a hook which is hung at the top end of the positioning steel pipe pile and can rotate properly, and the direction and the position of the guide ring beam are adjusted.
The guide ring beam is a U-shaped channel steel welded by a steel plate with the thickness of 10mm, the welding height is 0.4cm, and the welding width is 0.2cm. When the steel sheet pile is driven, the steel sheet pile is driven by the guide of the guide ring beam. The supporting piece and the guide ring beam can be recycled for multiple times.
The inside of the underwater cofferdam structure is poured with the back cover concrete 5, the back cover concrete is poured with the bearing platform, and the bearing platform is poured with the foundation pile. And accurately positioning the foundation pile through the steel sheet pile. The guide ring beam is used for guiding construction of the steel sheet pile, and construction precision and construction quality of the steel sheet pile are improved.
The underwater cofferdam structure adopts the integral stability of the combined pile of the positioning steel pipe pile, the steel sheet pile and the reinforcing pile, all accumulated water in the cofferdam can be removed at one time after the cofferdam is integrally finished, the deformation of the measuring cofferdam is monitored in the process to guide construction, the construction process is simplified, the construction efficiency is improved, and the construction time is shortened.
According to the underwater cofferdam structure, the stress calculation is carried out through the construction of the combined cofferdam piles, the strength and the rigidity of the combined piles are greatly increased compared with those of a single steel sheet pile, the deformation resistance is improved, the deformation is smaller under the premise of unchanging stress according to the calculation, the number of cofferdam supports is reduced, the spacing height of the cofferdam supports is increased, the working procedures are reduced, the time is shortened, and the cost investment is reduced.
The underwater cofferdam structure of the invention has the advantages of accurate positioning of the steel sheet piles, tight connection, optimization of the combined piles, improved sealing performance, reduced leakage and improved construction safety.
The invention provides a construction method of an underwater cofferdam structure, which comprises the following steps:
s1: and a plurality of positioning steel pipe piles 1 are arranged at intervals along the outer contour line of the underwater cofferdam structure.
In the embodiment, the steel pile casing on the periphery of the abutment used in the construction stage of the bored pile is used as a construction work platform, materials are transported to the site and are classified and numbered and stacked, and the work platform meets the bearing, the rotating radius and the construction clear distance of machinery.
In this embodiment, the outer contour line of the cofferdam structure is rectangular. And positioning steel pipe piles are respectively arranged at the four corners of the outer contour line and the middle positions of the long edges and the short edges.
According to the design position of the underwater cofferdam structure and the direction of a bracket for positioning the steel pipe pile, the position is accurately measured by adopting a GPS (global positioning system), the corner piles at the corners of the cofferdam structure are firstly driven, the position is ensured to be accurate, the construction error is controlled within 2cm, the verticality is not inclined, and the design position of the layered supporting point is ensured by strictly controlling the elevation. And then constructing the positioning steel pipe piles between the angle piles, wherein the key point requirement is the same as that of the angle piles.
S2: a guide ring beam 13 is detachably mounted on the upper part of the inner side of the plurality of positioning steel pipe piles 1.
After the positioning steel pipe piles are driven to the designed positions, the bearing piece is installed at the upper end of each positioning steel pipe pile, then the guide ring beam is installed, the direction is accurately adjusted according to the designed direction, and the self-stability is realized by the dead weight of the guide ring beam and the embedding and extruding force of the bearing piece and the positioning steel pipe piles.
S3: and (3) driving a steel sheet pile 2 between two adjacent positioning steel pipe piles 1, so that the steel sheet pile 2 is tied between the two adjacent positioning steel pipe piles 1 and is attached to the guide ring beam 13.
The steel sheet piles are driven from the upstream, the positioning steel sheet piles are driven from two ends of the positioning steel pipe piles to the middle positioning steel sheet piles respectively, the short lines are controlled by long lines to ensure the construction accuracy, the measurement work is enhanced in the process, the adjustment is carried out in time when the inclination is found, in order to ensure the requirements of smooth folding verticality, the steel sheet piles are driven to the designed positions at the beginning, about 1/3 of the steel sheet piles are inserted (inserted into the stratum part) and then driven (the designed positions) to ensure the effective adjustment during the folding, and the steel sheet piles are driven to the designed depth after the folding.
S4: and a reinforcing pile 21 is inserted into the vertical through groove on the inner side of the steel sheet pile 2, so that the upper end of the reinforcing pile 21 is pressed against the guide ring beam 13.
S5: install the first way in the upper portion of the inboard of many location steel-pipe pile 1 and steel sheet pile 2 and enclose purlin 3, the first way encloses purlin 3 and sets up the round along outer contour line, and the multichannel encloses purlin 3 and sets up along vertical direction interval.
S6: an inner support is arranged on the inner side of the first enclosing purlin 3, so that the inner support is supported on the inner side of the first enclosing purlin 3.
The supporting position of the bracket of the steel pipe pile is positioned according to the measured elevation, the bracket can be properly adjusted according to actual conditions, the first layer of enclosing purlin is installed (namely the first channel enclosing purlin), the enclosing purlin and the bracket are required to be firm, stable, tight in contact and straight and natural, balanced stress is guaranteed, force is transferred correctly, the inclined support is installed again, and the transverse support is installed at last. All the joint parts are required to be checked after the installation is finished, the reinforcement is reinforced by adopting measures such as welding, wood plug adding and the like, the contact surface of the target is as large as possible, and local unbalanced stress is prevented.
And (4) according to stress calculation and analysis, jumping and driving reinforcing piles at intervals between the enclosing purlin and the steel sheet piles according to the steel sheet piles as guide piles. The spacing of the reinforcement piles can be calculated according to software analysis. On the basis of guaranteeing the overall strength, rigidity, the stability of cofferdam, the project cost is reduced as far as possible.
S7: accumulated water on the inner side of the steel sheet pile 2 is drained at one time.
S8: after ponding is got rid of, all the other purlins of enclosing 3 are installed to the lower part of the inboard of many location steel-pipe piles 1 and steel sheet pile 2 for the multichannel encloses purlin 3 and sets up along vertical direction interval.
S9: and inner supports are arranged on the inner sides of the surrounding purlins 3 of other tracks to form an underwater cofferdam structure, so that the inner supports are supported on the inner sides of the surrounding purlins 3 of other tracks.
The underwater cofferdam structure adopts the combined piles to increase the overall strength, rigidity and stability of the cofferdam, all accumulated water in the cofferdam is removed at one time, the second and third purlin supports are constructed in a layering way, and then cleaning and bottom sealing operations are carried out.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention according to the present application is not limited to the specific combination of the above-mentioned features, but also covers other embodiments where any combination of the above-mentioned features or their equivalents is made without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (7)
1. A construction method of an underwater cofferdam structure is characterized by comprising the following steps:
a plurality of positioning steel pipe piles are arranged at intervals along the outer contour line of the underwater cofferdam structure;
the upper parts of the inner sides of the positioning steel pipe piles are detachably provided with guide ring beams;
driving a steel sheet pile between two adjacent positioning steel pipe piles, so that the steel sheet pile is tied between the two adjacent positioning steel pipe piles and is attached to the guide ring beam;
inserting reinforcing piles into the vertical through grooves in the inner sides of the steel sheet piles, so that the upper ends of the reinforcing piles are pressed against the guide ring beams;
installing a first purlin on the upper parts of the inner sides of the positioning steel pipe piles and the steel sheet piles, wherein the first purlin is provided with a circle along the outer contour line, and a plurality of purlins are arranged at intervals in the vertical direction;
arranging an inner support on the inner side of the first purlin, so that the inner support is supported on the inner side of the first purlin;
accumulated water on the inner side of the steel sheet pile is drained at one time;
after the accumulated water is discharged, installing other paths of purlins at the lower parts of the inner sides of the positioning steel pipe piles and the steel sheet piles, and enabling the paths of purlins to be arranged at intervals in the vertical direction;
and arranging inner supports on the inner sides of the other enclosing purlins to form an underwater cofferdam structure, so that the inner supports are supported on the inner sides of the other enclosing purlins.
2. An aquatic cofferdam structure, comprising:
the positioning steel pipe piles are arranged at intervals along the outer contour line of the underwater cofferdam structure, and guide ring beams are detachably arranged at the upper parts of the inner sides of the positioning steel pipe piles;
the steel sheet piles are tied between two adjacent positioning steel pipe piles and attached to the guide ring beam, reinforcing piles are inserted into vertical through grooves in the inner sides of the steel sheet piles, and the upper ends of the reinforcing piles are pressed against the guide ring beam;
the enclosing purlins are arranged on the inner sides of the positioning steel pipe piles and the steel sheet piles and are arranged in circles along the outer contour line, and the enclosing purlins are arranged at intervals in the vertical direction; and
and the inner support is arranged on the inner side of each enclosing purlin.
3. The underwater cofferdam structure of claim 2, wherein the steel sheet piles have a plurality of vertical through-slots on the inner side thereof, the plurality of vertical through-slots are arranged along the length direction of the steel sheet piles, and the reinforcing piles are arranged at intervals.
4. The underwater cofferdam structure of claim 2, wherein the pile bottom elevation of the reinforcing piles is smaller than the pile bottom elevation of the steel sheet piles.
5. The underwater cofferdam structure of claim 2, wherein the reinforcing piles are i-shaped steel piles.
6. The underwater cofferdam structure of claim 2, wherein the inner supports comprise transverse supports, vertical supports and oblique supports, the transverse supports are supported between opposite sides of the inner side of each purlin, the oblique supports are supported at corners of each purlin, and the vertical supports are connected between two adjacent purlins.
7. The underwater cofferdam structure of claim 2, wherein a support member is hung on the upper end of the positioning steel pipe pile, the support member is formed with a limiting through groove, and the guiding ring beam is embedded in the limiting through grooves of the support members of the plurality of positioning steel pipe piles.
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| CN202211040102.7A CN115341562A (en) | 2022-08-29 | 2022-08-29 | Underwater cofferdam structure and construction method thereof |
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| CN202211040102.7A CN115341562A (en) | 2022-08-29 | 2022-08-29 | Underwater cofferdam structure and construction method thereof |
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2022
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| JP2009019372A (en) * | 2007-07-10 | 2009-01-29 | Nippon Steel Corp | Wall structure of corner part using built-up steel sheet pile |
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| CN102900089A (en) * | 2012-10-31 | 2013-01-30 | 东南大学 | Combined steel pile cofferdam provided with water swellable waterproof rubber fore shaft |
| CN108330995A (en) * | 2018-01-23 | 2018-07-27 | 四川公路桥梁建设集团有限公司 | Construction method of steel sheet pile cofferdam in deep water thick silt layer environment |
| CN108729458A (en) * | 2018-08-02 | 2018-11-02 | 杭州江润科技有限公司 | The underwater propping steel sheet pile cofferdam construction structure of deep water and its construction method |
| CN111980039A (en) * | 2020-06-18 | 2020-11-24 | 中铁十一局集团第一工程有限公司 | Construction method and structure of steel sheet pile cofferdam in tidal zone of sea area |
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Application publication date: 20221115 |