CN111139848A - Steel cofferdam and assembling method thereof - Google Patents
Steel cofferdam and assembling method thereof Download PDFInfo
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- CN111139848A CN111139848A CN202010003093.9A CN202010003093A CN111139848A CN 111139848 A CN111139848 A CN 111139848A CN 202010003093 A CN202010003093 A CN 202010003093A CN 111139848 A CN111139848 A CN 111139848A
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- steel cofferdam
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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
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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Abstract
The invention relates to the technical field of bridge construction, in particular to a steel cofferdam and an assembling method thereof, wherein the steel cofferdam comprises a first steel cofferdam section and a second steel cofferdam section which are adjacently arranged, the second steel cofferdam section is positioned above the first steel cofferdam section, a limiting plate is arranged on the side surface of the first steel cofferdam section, and the limiting plate extends out of the top surface of the first steel cofferdam section; or the side surface of the second steel cofferdam segment is provided with a limiting plate, and the limiting plate extends out of the bottom surface of the second steel cofferdam segment; the assembly method of the steel cofferdam comprises the following steps: the method comprises the following steps: mounting a limiting plate on one side face of the steel cofferdam segment, and enabling the limiting plate to extend out of the top face of the first steel cofferdam segment; step two: and limiting by using the limiting plate, and assembling a second steel cofferdam section above the first steel cofferdam section. Due to the fact that the limiting plate is arranged, when the second steel cofferdam segment is assembled on the first steel cofferdam segment, the limiting plate provides position reference, and assembling precision and efficiency are improved.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a steel cofferdam and an assembling method thereof.
Background
With the development of bridge construction, large-scale steel cofferdams are more and more widely applied, wherein the adoption of slope surface integral assembly and air bag method launching is one of the main construction methods of the large-scale steel cofferdams. The steel cofferdam is divided into a plurality of sections from top to bottom, each section comprises a plurality of blocks, the steel cofferdam is assembled at present, the method of assembling the bottom sections of the steel cofferdam in blocks and sequentially assembling the subsequent sections on the bottom sections is generally adopted, however, construction on the slope surface according to the method has the advantages of high dislocation rate of steel cofferdam members, low assembling precision, incapability of effectively controlling section hoisting postures, long air adjustment time and high overhead operation risk.
Disclosure of Invention
The invention aims to: the steel cofferdam and the assembling method thereof are provided for solving the problems that in the prior art, the dislocation rate of steel cofferdam components is high, and the assembling precision and efficiency are low by a method of assembling steel cofferdam bottom sections on a slope surface in blocks and sequentially assembling subsequent sections on the bottom sections.
In order to achieve the purpose, the invention adopts the technical scheme that:
a steel cofferdam comprises a first steel cofferdam section and a second steel cofferdam section which are adjacently arranged, wherein the second steel cofferdam section is positioned above the first steel cofferdam section,
a limiting plate is arranged on the side face of the first steel cofferdam segment and extends out of the top face of the first steel cofferdam segment; or a limiting plate is arranged on the side face of the second steel cofferdam segment and extends out of the bottom face of the second steel cofferdam segment.
Because the side face of the first steel cofferdam segment is provided with the limiting plate, and the limiting plate extends out of the top face of the first steel cofferdam segment, after the first steel cofferdam segment is assembled in construction, a position reference is provided for assembling the second steel cofferdam segment due to the limiting function of the limiting plate, and the second steel cofferdam segment can be assembled by abutting against the limiting plate;
or because the side surface of the second steel cofferdam segment is provided with a limiting plate, and the limiting plate extends out of the bottom surface of the second steel cofferdam segment, when the second steel cofferdam segment is assembled on the first steel cofferdam segment, the limiting plate is abutted against the first steel cofferdam segment by using the limiting function of the limiting plate, and then the second steel cofferdam segment is assembled;
therefore, the dislocation rate of the steel cofferdam members is reduced, and the assembling precision and efficiency are improved; due to the limiting effect of the limiting plate, the steel cofferdam is convenient to assemble and simple to operate, the assembling field is effectively reduced, and the field utilization rate is improved; the steel cofferdam can be assembled on the slope surface in advance and then filled with water, so that the construction environment at the bridge site is not influenced, the construction efficiency is improved, and the construction period is shortened.
According to the preferable scheme, the limiting plate is a steel plate or an I-shaped steel. The steel plate and the I-shaped steel have enough rigidity strength for limiting, the steel cofferdam segment II can be conveniently assembled on the steel cofferdam segment I, and the assembling precision is improved. And the steel plate and the I-shaped steel are common structural members in construction, so that the materials can be directly obtained on site.
As a preferable scheme of the invention, the first steel cofferdam section comprises a plurality of first steel cofferdam units, each first steel cofferdam unit is provided with at least two limiting plates, or the second steel cofferdam section comprises a plurality of second steel cofferdam units, and each second steel cofferdam unit is provided with at least two limiting plates.
Because the first steel cofferdam section comprises a plurality of first steel cofferdam units or the second steel cofferdam section comprises a plurality of second steel cofferdam units, the construction can be simultaneously carried out at multiple points when the first steel cofferdam section or the second steel cofferdam section is assembled, the construction efficiency is improved, and the construction period is shortened; because two points determine a straight line, and at least two limiting plates are arranged, a better limiting effect can be achieved.
Preferably, the limiting plate is located on the inner side and/or the outer side of the first steel cofferdam segment, or the limiting plate is located on the inner side and/or the outer side of the second steel cofferdam segment.
As a preferable scheme of the invention, the cofferdam further comprises a steel cofferdam section three and a steel cofferdam section four, wherein the steel cofferdam section three is arranged adjacent to the steel cofferdam section two, the steel cofferdam section three is positioned above the steel cofferdam section two, the steel cofferdam section four is arranged adjacent to the steel cofferdam section three, the steel cofferdam section four is positioned above the steel cofferdam section three,
a limiting plate is arranged on the side face of the second steel cofferdam segment and extends out of the top face of the second steel cofferdam segment, a limiting plate is arranged on the side face of the third steel cofferdam segment and extends out of the top face of the third steel cofferdam segment;
or the side surface of the third steel cofferdam segment is provided with a limiting plate, the limiting plate extends out of the bottom surface of the third steel cofferdam segment, the side surface of the fourth steel cofferdam segment is provided with a limiting plate, and the limiting plate extends out of the bottom surface of the fourth steel cofferdam segment.
Because the side face of the second steel cofferdam segment is provided with the limiting plate, and the limiting plate extends out of the top face of the second steel cofferdam segment, when the third steel cofferdam segment is assembled, position reference is provided for assembling the third steel cofferdam segment due to the limiting function of the limiting plate on the second steel cofferdam segment, and similarly, when the fourth steel cofferdam segment is assembled, position reference is provided for assembling the fourth steel cofferdam segment due to the limiting function of the limiting plate on the third steel cofferdam segment, so that when the fourth steel cofferdam segment is assembled, the dislocation rate of a steel cofferdam component is reduced, and the assembling precision and efficiency are improved.
Or because the side of the third steel cofferdam segment is provided with the limiting plate, and the limiting plate extends out of the bottom surface of the third steel cofferdam segment, when the third steel cofferdam segment is assembled, because of the limiting function of the limiting plate on the third steel cofferdam segment, a position reference is provided for assembling the third steel cofferdam segment, and similarly, when the fourth steel cofferdam segment is assembled, because of the limiting function of the limiting plate on the fourth steel cofferdam segment, a position reference is provided for assembling the fourth steel cofferdam segment, therefore, when the fourth steel cofferdam segment is assembled, the dislocation rate of the steel cofferdam member is reduced, and the assembling precision and efficiency are improved.
A steel cofferdam splicing method comprises the following steps:
the method comprises the following steps: mounting a limiting plate on the side face of the first steel cofferdam segment, and enabling the limiting plate to extend out of the top face of the first steel cofferdam segment;
step two: and limiting by using the limiting plate, and assembling a second steel cofferdam section above the first steel cofferdam section.
Because the limiting plate is arranged on the side face of the first steel cofferdam segment and extends out of the top face of the first steel cofferdam segment, after the first steel cofferdam segment is assembled in construction, position reference is provided for assembling the second steel cofferdam segment due to the limiting function of the limiting plate, and the second steel cofferdam segment is assembled close to the limiting plate when being assembled. The assembly method reduces the dislocation rate of the steel cofferdam members and improves the assembly precision and efficiency; due to the limiting effect of the limiting plate, the steel cofferdam is convenient to assemble and simple to operate, the assembling field is effectively reduced, and the field utilization rate is improved; the steel cofferdam can be assembled on the slope surface in advance and then filled with water, so that the construction environment at the bridge site is not influenced, the construction efficiency is improved, and the construction period is shortened.
As a preferable scheme of the invention, in the first step, a plurality of first steel cofferdam units are assembled to form the first steel cofferdam sections, and at least two limiting plates are arranged on each first steel cofferdam unit.
Because the first steel cofferdam section comprises the first steel cofferdam units, the construction can be simultaneously carried out at multiple points when the steel cofferdam sections are assembled, the construction efficiency is improved, and the construction period is shortened; because two points determine a straight line, and at least two limiting plates are arranged, a better limiting effect can be achieved.
As a preferable embodiment of the present invention, the present invention further comprises
Step three: mounting the limiting plate on the side face of the second steel cofferdam segment, and enabling the limiting plate to extend out of the top face of the second steel cofferdam segment;
step four: limiting by using the limiting plate, and assembling a third steel cofferdam section above the second steel cofferdam section;
step five: mounting the limiting plate on the side face of the third steel cofferdam segment, and enabling the limiting plate to extend out of the top face of the third steel cofferdam segment;
step six: and limiting by using the limiting plate, and assembling a steel cofferdam section IV above the steel cofferdam section III.
Because the side face of the second steel cofferdam segment is provided with the limiting plate, and the limiting plate extends out of the top face of the second steel cofferdam segment, when the third steel cofferdam segment is assembled, position reference is provided for assembling the third steel cofferdam segment due to the limiting function of the limiting plate on the second steel cofferdam segment, and similarly, when the fourth steel cofferdam segment is assembled, position reference is provided for assembling the fourth steel cofferdam segment due to the limiting function of the limiting plate on the third steel cofferdam segment, so that when the fourth steel cofferdam segment is assembled, the dislocation rate of a steel cofferdam component is reduced, and the assembling precision and efficiency are improved.
As a preferred embodiment of the present invention, the first step further comprises:
arranging support piers on the slope surface to form an assembled jig frame, and installing a bottom supporting plate on the assembled jig frame;
assembling the first steel cofferdam segment on the bottom supporting plate, connecting the bottom supporting plate with the first steel cofferdam segment by using a connecting piece, wherein the bottom supporting plate is used for supporting the steel cofferdam and facilitating the steel cofferdam to slide down from the slope surface into water.
As a preferred aspect of the present invention, the second steel cofferdam segment includes a plurality of second steel cofferdam units, and the first step can be replaced by: and mounting a limiting plate on the side surface of each second steel cofferdam unit, and enabling the limiting plate to extend out of the bottom surface of the second steel cofferdam unit.
Because the side face of the second steel cofferdam unit is provided with the limiting plate, and the limiting plate extends out of the bottom face of the second steel cofferdam unit, when the second steel cofferdam section is assembled on the first steel cofferdam section, the limiting plate is abutted against the first steel cofferdam section by utilizing the limiting function of the limiting plate, and then the second steel cofferdam unit is assembled to form the second steel cofferdam section, so that the dislocation rate of the steel cofferdam component is reduced, and the assembling precision and efficiency are improved.
In summary, due to the adoption of the technical scheme, the steel cofferdam has the beneficial effects that:
1. due to the limiting effect of the limiting plate, the dislocation rate of the steel cofferdam component is reduced, the assembling precision and efficiency are improved, the steel cofferdam is convenient to assemble, the operation is simple, the assembling field is effectively reduced, and the field utilization rate is improved;
2. the steel cofferdam can be assembled on the slope surface in advance and then filled with water, so that the construction environment at the bridge site is not influenced, the construction efficiency is improved, and the construction period is shortened;
3. each steel cofferdam section comprises a plurality of steel cofferdam units, so that when the steel cofferdam sections are assembled, construction can be carried out at multiple points simultaneously, the construction efficiency is improved, and the construction period is shortened;
4. because two points determine a straight line, and at least two limiting plates are arranged, a better limiting effect can be achieved.
The steel cofferdam assembly method has the beneficial effects that:
1. due to the limiting effect of the limiting plate, the dislocation rate of the steel cofferdam component is reduced, the assembling precision and efficiency are improved, the steel cofferdam is convenient to assemble, the operation is simple, the assembling field is effectively reduced, and the field utilization rate is improved;
2. the steel cofferdam is assembled on the slope surface in advance and then filled with water, so that the construction environment at the bridge site is not influenced, the construction efficiency is improved, and the construction period is shortened.
Drawings
Fig. 1 is a top view of a steel cofferdam segment one according to embodiment 1 of the present invention.
Fig. 2 is an enlarged view of fig. 1 at I.
Fig. 3 is a top view of a second steel cofferdam segment according to embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of the steel cofferdam of embodiment 1 of the present invention.
Fig. 5 is an enlarged view of fig. 4 at II.
Fig. 6 is a schematic structural view of a steel cofferdam according to embodiment 3 of the present invention.
Fig. 7 is a schematic view of hoisting according to embodiment 3 of the present invention.
Icon: 1-assembling a jig frame; 11-buttress; 2-a bottom pallet; 3, a crane; 41-steel cofferdam segment one; 411-steel cofferdam unit one; 42-steel cofferdam segment two; 421-steel cofferdam unit II; 43-steel cofferdam segment three; 44-steel cofferdam segment four; 5-a limiting plate; 6-internal bracing.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-5, a steel cofferdam includes a first steel cofferdam segment 41 and a second steel cofferdam segment 42 which are adjacently disposed, the second steel cofferdam segment 42 is located above the first steel cofferdam segment 41, a limiting plate 5 is disposed on an outer side surface of the first steel cofferdam segment 41, and the limiting plate 5 extends out of a top surface of the first steel cofferdam segment 41.
The first steel cofferdam section 41 comprises a plurality of first steel cofferdam units 411, the second steel cofferdam section 42 comprises a plurality of second steel cofferdam units 421, and at least two limiting plates 5 are arranged on each first steel cofferdam unit 411. And inner supports 6 are further arranged in the first steel cofferdam segment 41 and the second steel cofferdam segment 42.
In this embodiment, the length of each first steel cofferdam unit 411 is 6 meters, and two limiting plates 5 are mounted on each first steel cofferdam unit 411 and are respectively arranged at 50cm positions close to two ends of each first steel cofferdam unit 411.
In this embodiment, the limiting plate 5 is an i-steel, the i-steel includes a flange plate and a web, and one flange plate of the i-steel is welded to the first steel cofferdam segment 41.
The first steel cofferdam segment 41 may be any section of the steel cofferdam, and the second steel cofferdam segment 42 is a section above and adjacent to the first steel cofferdam segment 41.
The assembling method of the steel cofferdam comprises the following steps:
the method comprises the following steps: assembling a first steel cofferdam unit 411 to form a first steel cofferdam section 41, welding two limiting plates 5 on the side surface of each first steel cofferdam unit 411, and enabling the limiting plates 5 to extend out of the top surface of the first steel cofferdam unit 411;
step two: and limiting by using the limiting plate 5, and assembling a second steel cofferdam unit 421 on each first steel cofferdam unit 411 to form a second steel cofferdam section 42.
Example 2
The difference between the present embodiment and embodiment 1 is that a steel cofferdam includes a first steel cofferdam segment 41 and a second steel cofferdam segment 42 that are adjacently disposed, where the second steel cofferdam segment 42 is located above the first steel cofferdam segment 41, a limiting plate 5 is disposed on an outer side surface of the second steel cofferdam segment 42, and the limiting plate 5 extends out of a bottom surface of the second steel cofferdam segment 42.
At least two limiting plates 5 are arranged on each second steel cofferdam unit 421, and the limiting plates 5 are steel plates.
In this implementation, the length of each second steel cofferdam unit 421 is 6 meters, and two limiting plates 5 are mounted on each second steel cofferdam unit 421 and are respectively arranged at 50cm positions close to two ends of each second steel cofferdam unit 421.
The assembling method of the steel cofferdam comprises the following steps:
the method comprises the following steps: a limiting plate 5 is arranged on the side surface of each second steel cofferdam unit 421, and the limiting plate 5 extends out of the bottom surface of the second steel cofferdam unit 421;
step two: and limiting by using the limiting plate 5, and assembling a second steel cofferdam unit 421 above each first steel cofferdam unit 411 of the first steel cofferdam section 41, so as to form a second steel cofferdam section 42.
Example 3
As shown in fig. 6-7, this embodiment differs from embodiment 1 in that said steel cofferdam further comprises a steel cofferdam section three 43 and a steel cofferdam section four 44, said steel cofferdam section three 43 being arranged adjacent to said steel cofferdam section two 42 with said steel cofferdam section three 43 being above said steel cofferdam section two 42, said steel cofferdam section four 44 being arranged adjacent to said steel cofferdam section three 43 with said steel cofferdam section four 44 being above said steel cofferdam section three 43.
The outer side face of the second steel cofferdam segment 42 is provided with a limiting plate 5, the limiting plate 5 extends out of the top face of the second steel cofferdam segment 42, the outer side face of the third steel cofferdam segment 43 is provided with a limiting plate 5, and the limiting plate 5 extends out of the top face of the third steel cofferdam segment 43.
In this embodiment, the height of the first steel cofferdam segment 41 is 7 meters, and the heights of the second steel cofferdam segment 42, the third steel cofferdam segment 43 and the fourth steel cofferdam segment 44 are all 6 meters.
The assembly method of the steel cofferdam in the embodiment comprises the following steps:
the method comprises the following steps: arranging support piers 11 on a slope surface, measuring the elevations of all the support piers 11, adjusting the top surfaces of all the support piers 11 in the same plane to form an assembly jig frame 1, and installing a bottom supporting plate 2 on the assembly jig frame 1;
step two: assembling the first steel cofferdam segment 41 on the bottom supporting plate 2, and connecting the bottom supporting plate 2 with the first steel cofferdam segment 41 by using a connecting piece, wherein the connecting piece is a steel wire rope;
step three: installing a limiting plate 5 on the side surface of the first steel cofferdam segment 41, and enabling the limiting plate 5 to extend out of the top surface of the first steel cofferdam segment 41;
step four: limiting by using the limiting plate 5, and assembling a second steel cofferdam segment 42 above the first steel cofferdam segment 41;
step five: installing the limiting plate 5 on the side surface of the second steel cofferdam segment 42, and enabling the limiting plate 5 to extend out of the top surface of the second steel cofferdam segment 42;
step six: limiting by using the limiting plate 5, and assembling a third steel cofferdam segment 43 above the second steel cofferdam segment 42;
step seven: mounting the limiting plate 5 on the side surface of the third steel cofferdam section 43, and enabling the limiting plate 5 to extend out of the top surface of the third steel cofferdam section 43;
step eight: and limiting by using the limiting plate 5, and assembling a steel cofferdam section four 44 above the steel cofferdam section three 43.
The steel cofferdam segments of each layer are formed by assembling a plurality of steel cofferdam units, and when the steel cofferdam segments of the upper layer are assembled, the steel cofferdam segments can be limited and assembled by a plurality of steel cofferdam units, so that the assembling efficiency is improved.
In this embodiment, the bottom supporting plate 2, the first steel cofferdam segment 41, the second steel cofferdam segment 42, the third steel cofferdam segment 43 and the fourth steel cofferdam segment 44 are all installed by a crane 3, the crane 3 is a crawler crane and/or a truck crane, preferably, two crawler cranes are used for cooperation, so that the hoisting posture of each segment of the steel cofferdam is conveniently controlled, the air adjustment time is shortened, and the high-altitude operation risk is reduced.
Example 4
The difference between this embodiment and embodiment 3 is that no limiting plate 5 is provided on first steel cofferdam segment 41, a limiting plate 5 is provided on the side of second steel cofferdam segment 42, and the limiting plate 5 extends out of the bottom surface of second steel cofferdam segment 42, a limiting plate 5 is provided on the side of third steel cofferdam segment 43, and the limiting plate 5 extends out of the bottom surface of third steel cofferdam segment 43, a limiting plate 5 is provided on the side of fourth steel cofferdam segment 44, and the limiting plate 5 extends out of the bottom surface of fourth steel cofferdam segment 44.
And correspondingly assembling the second steel cofferdam unit 421 on the first steel cofferdam section 41 by utilizing the limiting function of the limiting plate 5, and completing the assembling of the second steel cofferdam section 42. Likewise, the assembly of the third steel cofferdam section 43 and the fourth steel cofferdam section 44 is continued on the second steel cofferdam section 42.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A steel cofferdam, characterized in that it comprises a first steel cofferdam section (41) and a second steel cofferdam section (42) which are adjacently arranged, the second steel cofferdam section (42) is positioned above the first steel cofferdam section (41),
a limiting plate (5) is arranged on the side face of the first steel cofferdam segment (41), and the limiting plate (5) extends out of the top face of the first steel cofferdam segment (41); or a limiting plate (5) is arranged on the side face of the second steel cofferdam segment (42), and the limiting plate (5) extends out of the bottom face of the second steel cofferdam segment (42).
2. The steel cofferdam of claim 1, characterized in that said plate (5) of restriction is steel plate or i-steel.
3. A steel cofferdam according to claim 1, characterized in that said first steel cofferdam section (41) comprises a number of first steel cofferdam units (411), each of said first steel cofferdam units (411) being provided with at least two of said limiting plates (5), or said second steel cofferdam section (42) comprises a number of second steel cofferdam units (421), each of said second steel cofferdam units (421) being provided with at least two of said limiting plates (5).
4. -steel cofferdam according to any of the claims 1 to 3 characterized in that said plate (5) of limitation is located on the internal and/or external side of the first section (41) of steel cofferdam or said plate (5) of limitation is located on the internal and/or external side of the second section (42) of steel cofferdam.
5. A steel cofferdam according to any of the claims 1-3, further comprising steel cofferdam section three (43) and steel cofferdam section four (44), said steel cofferdam section three (43) being arranged adjacent to said steel cofferdam section two (42) and said steel cofferdam section three (43) being located above said steel cofferdam section two (42), said steel cofferdam section four (44) being arranged adjacent to said steel cofferdam section three (43) and said steel cofferdam section four (44) being located above said steel cofferdam section three (43),
a limiting plate (5) is arranged on the side face of the second steel cofferdam segment (42), the limiting plate (5) extends out of the top face of the second steel cofferdam segment (42), a limiting plate (5) is arranged on the side face of the third steel cofferdam segment (43), and the limiting plate (5) extends out of the top face of the third steel cofferdam segment (43);
or the side surface of the third steel cofferdam segment (43) is provided with a limiting plate (5), the limiting plate (5) extends out of the bottom surface of the third steel cofferdam segment (43), the side surface of the fourth steel cofferdam segment (44) is provided with a limiting plate (5), and the limiting plate (5) extends out of the bottom surface of the fourth steel cofferdam segment (44).
6. The steel cofferdam splicing method is characterized by comprising the following steps:
the method comprises the following steps: mounting a limiting plate (5) on the side surface of the first steel cofferdam segment (41), and enabling the limiting plate (5) to extend out of the top surface of the first steel cofferdam segment (41);
step two: and limiting by using the limiting plate (5), and assembling a second steel cofferdam segment (42) above the first steel cofferdam segment (41).
7. A method for assembling a steel cofferdam according to claim 6, characterized in that in said first step, several steel cofferdam units one (411) are assembled to form said steel cofferdam sections one (41), and at least two said limit plates (5) are provided on each of said steel cofferdam units one (411).
8. The assembly method of steel cofferdam according to claim 6 or 7, further comprising
Step three: mounting the limiting plate (5) on the side surface of the second steel cofferdam section (42) and enabling the limiting plate (5) to extend out of the top surface of the second steel cofferdam section (42);
step four: limiting by using the limiting plate (5), and assembling a third steel cofferdam segment (43) above the second steel cofferdam segment (42);
step five: mounting the limiting plate (5) on the side surface of the third steel cofferdam section (43), and enabling the limiting plate (5) to extend out of the top surface of the third steel cofferdam section (43);
step six: and limiting by using the limiting plate (5), and assembling a steel cofferdam section IV (44) above the steel cofferdam section III (43).
9. The method for assembling a steel cofferdam according to claim 8, wherein said step one is preceded by the steps of:
arranging support piers (11) on the slope surface to form an assembled jig frame (1), and mounting a bottom supporting plate (2) on the assembled jig frame (1);
assembling the first steel cofferdam segment (41) on the bottom supporting plate (2), and connecting the bottom supporting plate (2) with the first steel cofferdam segment (41) by using a connecting piece.
10. A method for assembling a steel cofferdam according to claim 6 or 7, characterized in that said steel cofferdam section two (42) comprises a number of steel cofferdam units two (421), said steps one can be replaced by: and mounting a limiting plate (5) on the side surface of each second steel cofferdam unit (421), and enabling the limiting plate (5) to extend out of the bottom surface of the second steel cofferdam unit (421).
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| CN202010003093.9A CN111139848A (en) | 2020-01-02 | 2020-01-02 | Steel cofferdam and assembling method thereof |
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| CN202010003093.9A CN111139848A (en) | 2020-01-02 | 2020-01-02 | Steel cofferdam and assembling method thereof |
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| CN107044129A (en) * | 2017-01-20 | 2017-08-15 | 中国葛洲坝集团第六工程有限公司 | A kind of bottomless single wall steel boxed cofferdam of piecemeal pin-connected panel and its construction method |
| CN109827485A (en) * | 2019-03-20 | 2019-05-31 | 湖北省水利水电规划勘测设计院 | Pin-connected panel flyrock protection device and its application method for cofferdam demolition explosion |
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| CN102926387A (en) * | 2012-10-22 | 2013-02-13 | 中交第二航务工程局有限公司 | Mounting and guiding device and positioning method for underwater circuit purlins of steel sheet pile cofferdam |
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