CN114737583B - Cofferdam and construction method - Google Patents
Cofferdam and construction method Download PDFInfo
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- CN114737583B CN114737583B CN202210662874.8A CN202210662874A CN114737583B CN 114737583 B CN114737583 B CN 114737583B CN 202210662874 A CN202210662874 A CN 202210662874A CN 114737583 B CN114737583 B CN 114737583B
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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
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention relates to the technical field of cofferdams, in particular to a cofferdam and a construction method, wherein the cofferdam comprises a plurality of templates and connecting pieces, the templates are connected end to form an annular space, each connecting piece comprises a first connecting piece and a second connecting piece, one of two adjacent templates is provided with the first connecting piece, the other template is provided with the second connecting piece, and the first connecting pieces and the second connecting pieces are detachably connected to connect the two adjacent templates.
Description
Technical Field
The invention relates to the technical field of cofferdams, in particular to a cofferdam and a construction method.
Background
The cofferdam is often used in hydraulic engineering construction, for building permanent hydraulic facilities, the interim envelope of building, in the correlation technique, the cofferdam adopts the cofferdam maintenance structure of big drum and the inside reinforcement soil body more, generally insert the major diameter steel drum in soft soil layer and shake and sink to the holding power layer, through the overlap joint of arc steel sheet between each steel drum, set up the gravel pile and carry out the drainage, pack the sand charge in steel drum and arc steel sheet again, the work progress is loaded down with trivial details, the steel drum is perishable in marine, and the connection between the steel drum is unstable, lead to the structural stability of cofferdam to be difficult to guarantee.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a cofferdam and a construction method, which can improve the structural stability of the cofferdam.
The embodiment of the invention also provides a construction method of the cofferdam.
The cofferdam of the embodiment of the invention comprises: the plurality of templates are connected end to form an annular space; the connecting piece, the connecting piece includes first connecting piece and second connecting piece, adjacent two one of them installs in the template first connecting piece, another install on the template the second connecting piece, first connecting piece with second connecting piece detachably links to each other in order to be adjacent two the template links to each other.
The cofferdam provided by the embodiment of the invention can improve the structural stability of the cofferdam.
In some embodiments, the first connecting member is provided with a connecting hole, the second connecting member is provided with a connecting pin, and one end of the connecting pin can extend into the connecting hole to connect the first connecting member and the second connecting member.
In some embodiments, the die plate has a first side surface and a second side surface in a thickness direction thereof, the first side surface is arranged close to the annular space with respect to the second side surface, the connecting member has a first end surface and a second end surface in the thickness direction of the die plate, the second end surface is arranged away from the die plate with respect to the first end surface, and an arc degree of the second end surface is the same as an arc degree of the first side surface.
In some embodiments, the second sides of two adjacent templates are located on the same plane.
In some embodiments, the number of the first connecting members is set to be plural, the plural first connecting members are arranged at intervals in the height direction of the formwork, the number of the second connecting members is plural, the plural second connecting members are arranged at intervals in the height direction of the formwork, and the plural first connecting members and the plural second connecting members are connected in a one-to-one correspondence manner.
In some embodiments, the templates have a third side surface and a fourth side surface in the width direction, and the third side surface and the fourth side surface of two adjacent templates are attached.
In some embodiments, the form has a fill cavity therein, the fill cavity adapted to be filled with a filler.
The cofferdam construction method of the embodiment of the invention comprises the following steps: sequentially inserting a plurality of templates into the water bottom, and splicing the templates to enclose an annular space; filling a first filler into the filling cavity, and discharging a part of seawater in the template under the action of the first filler; and filling a second filler into the filling cavity, wherein the second filler fills the gap of the first filler under the action of self weight.
The cofferdam construction method of the embodiment of the invention simplifies the construction procedure and shortens the construction period.
In some embodiments, before the second filler is filled into the filling cavity, a protective agent is filled into the filling cavity, so that the ratio of the protective agent in the template to the seawater in the template is A, and 90ppm < A ≦ 110 ppm.
In some embodiments, the first filler is present in the fill cavity at a volume ratio of 40% to 60% and the second filler is present in the fill cavity at a volume ratio of 40% to 60%.
Drawings
Fig. 1 is a schematic view of a cofferdam of an embodiment of the present invention.
FIG. 2 is a schematic diagram of a first template of an embodiment of the invention.
Fig. 3 is a schematic diagram of a second template of an embodiment of the invention.
FIG. 4 is a schematic illustration of a third template of an embodiment of the invention.
Fig. 5 is a schematic view of the connection of the first connecting member and the second connecting member according to the embodiment of the present invention.
Fig. 6 is a schematic view of a first connector according to an embodiment of the present invention.
Fig. 7 is a schematic view of a second connector according to an embodiment of the present invention.
Fig. 8 is a schematic view of a formwork of the cofferdam construction method according to the embodiment of the present invention.
Fig. 9 is a schematic view showing a template inserted into the bottom of a water in the cofferdam construction method according to the embodiment of the present invention.
Fig. 10 is a schematic filling view of the first packing of the cofferdam construction method according to the embodiment of the present invention.
Fig. 11 is a schematic view illustrating the completion of the filling of the first filler in the cofferdam construction method according to the embodiment of the present invention.
Fig. 12 is a schematic filling view of a second packing of the cofferdam construction method according to the embodiment of the present invention.
Fig. 13 is a schematic view illustrating completion of filling of a second filler in the cofferdam construction method according to the embodiment of the present invention.
Fig. 14 is a schematic view of a floating layer above a formwork in the cofferdam construction method according to the embodiment of the present invention.
Reference numerals: the combination of weir 100, annular space 110,
the connecting member 2, the first connecting member 21, the first fixing portion 211, the first connecting portion 212, the connecting hole 2121,
the second connecting member 22, the second fixing portion 221, the second connecting portion 222, the connecting pin 2221,
a first filling 3, a second filling 4, a leveling layer 5 and water 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The cofferdam 100 of the present embodiment includes a plurality of formworks 1 and connecting members 2.
A plurality of forms 1 are connected end to define an annular space 110. The connecting piece 2 comprises a first connecting piece 21 and a second connecting piece 22, the first connecting piece 21 is installed on one of the two adjacent templates 1, the second connecting piece 22 is installed on the other template 1, and the first connecting piece 21 is detachably connected with the second connecting piece 22 so as to connect the two adjacent templates 1.
Specifically, the formworks 1 are connected end to end such that one end of one formwork 1 of two adjacent formworks 1 is connected to the other end of the other formwork 1 to enclose an annular space 110. Both sides on a plurality of templates 1 all are equipped with connecting piece 2, connect adjacent template 1 through connecting piece 2.
Optionally, the number of the templates 1 is multiple, a plurality of templates 1 are connected end to form an annular space 110, and the number of the templates 1 is determined according to actual design requirements.
For example, the left end of one template 1 of two adjacent templates 1 is connected with the right end of the other template 1 to enclose an annular space 110.
For example, the left end of one formwork 1 of the two adjacent formworks 1 is provided with a first connecting piece 21, the right end of the other formwork 1 is provided with a second connecting piece 22, and the two formworks 1 are connected through the connection of the first connecting piece 21 and the second connecting piece 22.
For example, the detachable connection of the first connecting piece 21 and the second connecting piece 22 can be used for conveniently replacing the template 1 when the template 1 is damaged, and the detachable connection mode is convenient for sequentially putting a plurality of templates 1 into the seawater 6, so that the connection convenience of the template 1 is improved.
For example, pile shoes can be arranged below the formwork 1, the pile shoes are arranged below the formwork 1, the arrangement of the pile shoes can protect the lower end of the formwork 1, and the problem that the stability of the formwork 1 is affected due to the fact that the lower end of the formwork 1 is worn when being inserted into a soil layer is avoided.
For example, the side of the lower end of the pile shoe, which is far away from the template 1, is an inclined plane or a sawtooth, and the arrangement of the inclined plane or the sawtooth can save more labor when the pile shoe drives the template 1 to be inserted into a soil layer.
In some embodiments, the first connecting member 21 is provided with a connecting hole 2121, the second connecting member 22 is provided with a connecting pin 2221, and one end of the connecting pin 2221 can extend into the connecting hole 2121 to connect the first connecting member 21 and the second connecting member 22.
Specifically, the first link member 21 and the second link member 22 are coupled by the coupling pin 2221 of the second link member 22 protruding into the coupling hole 2121 of the first link member 21.
According to the embodiment of the invention, the connecting holes 2121 and the connecting pins 2221 are arranged, the connecting pins 2221 are inserted into the connecting holes 2121 to connect the first connecting piece 21 and the second connecting piece 22, so that two adjacent templates 1 are connected, and the connecting convenience between the templates 1 can be improved through the structural arrangement of the connecting holes 2121 and the connecting pins 2221.
Alternatively, the first connecting member 21 includes a first fixing portion 211 and a first connecting portion 212, the fixing portion is connected to the mold plate 1, and the connecting hole 2121 is provided on the first connecting portion 212. First connecting piece 21 extends along left right direction, and first connecting portion 212 is connected with template 1 through first fixed part 211, and first connecting portion 212 is in the protruding setting of one side that template 1 and adjacent template 1 are connected promptly, and connecting hole 2121 is established on first connecting portion 212, through the protruding setting of first connecting portion 212, the mutual location between the template 1 of being convenient for, and convex structure sets up moreover, can also improve the connection convenience between the template 1.
Alternatively, the second connecting member 22 includes a second fixing portion 221 and a second connecting portion 222, the second fixing portion 221 is connected with the formwork 1, and the connecting pin 2221 is provided on the second connecting portion 222. Second connecting member 22 extends along the left-right direction, and second connecting portion 222 is connected with formwork 1 through second fixing portion 221, that is, second connecting portion 222 is disposed in a protruding manner on one side of formwork 1 connected with adjacent formwork 1, connecting pin 2221 is disposed on second connecting portion 222, and by the protruding arrangement of second connecting portion 222, positioning between connecting pin 2221 on second connecting portion 222 and connecting hole 2121 is facilitated, and the protruding structure arrangement can also improve connection convenience between first connecting portion 212 and second connecting portion 222.
For example, the first fixing portion 211 and the first connecting portion 212 are integrally formed, so that the structural strength of the first connecting member 21 can be improved, and the second fixing portion 221 and the second connecting portion 222 are integrally formed, so that the structural strength of the second connecting member 22 can be improved, so that the first connecting portion 212 and the second connecting portion 222 are more stably connected, and the connection stability between the formwork 1 and the formwork 1 is further improved.
For example, the connection hole 2121 is a through hole in the vertical direction, the connection pin 2221 extends into the connection hole 2121, and the connection pin 2221 may extend into the connection hole 2121 from the upper side or may extend into the connection hole 2121 from the lower side, specifically, the arrangement of the connection pin 2221 is taken as a standard.
For example, the connection hole 2121 is a through hole in the left-right direction, the connection pin 2221 extends into the connection hole 2121, and the connection pin 2221 may extend into the connection hole 2121 from the left or right direction, specifically, with respect to the arrangement of the connection pin 2221.
The formwork 1 may be, for example, steel plate, concrete plate, wood plate.
It is understood that the first connecting member 21 and the second connecting member 22 can be arranged in an interchangeable manner, that is, the first connecting member 21 is provided with the connecting pin 2221, the second connecting member 22 is provided with the connecting hole 2121, and the corresponding connecting relationship between the first connecting member 21 and the second connecting member 22 is aligned after the arrangement.
Compared with the connection mode of splicing the arc plates in the related technology, the connection mode of arranging the first connecting piece 21 and the second connecting piece 22 between the template 1 and the template 1 in the embodiment of the invention has the advantages that the airtightness between the template 1 and the template 1 is better, and the connection between the template 1 and the template 1 is more convenient.
In some embodiments, the formwork 1 has a first side surface 11 and a second side surface 12 in its thickness direction (front-back direction as shown in fig. 3), the first side surface 11 is arranged close to the annular space 110 relative to the second side surface 12, the connecting member 2 has a first end surface and a second end surface in the thickness direction of the formwork 1, the second end surface is arranged away from the formwork 1 relative to the first end surface, and the radian of the second end surface is the same as that of the first side surface 11.
Specifically, the first side surface 11 of the formwork 1 is a side close to the annular space 110, the second side surface 12 is a side far from the annular space 110, the first end surface is an end close to the second side surface 12, and the second end surface is an end far from the second side surface 12, that is, the first end surface is attached to the second side surface 12, so as to fix the connecting member 2 on the formwork 1.
Optionally, the template 1 may be set to have a radian according to design requirements, and when the template 1 has a radian, the radian of the first side surface 11 is the same as that of the second side surface 12, so that the stress of the template 1 is more balanced. When the template 1 is a radian plate, the radian of the connecting piece 2 is the same as that of the template 1, so that the connection between the connecting piece 2 and the template 1 is more stable, namely, the radian of the first end surface is the same as that of the second side surface 12, and the radian of the second end surface is the same as that of the first side surface 11.
When the formwork 1 is not provided with a radian, the first side surface 11 and the second side surface 12 are both planes, and the first end surface and the second end surface can also be set as planes, that is, the first end surface and the second end surface are both parallel to the first side surface 11, so as to ensure the connection stability of the connecting piece 2 and the formwork 1.
For example, the connecting member 2 may be welded to the formwork 1, and the connecting member 2 may be fixed to the formwork 1 in a welded connection manner, so that the connection stability between the connecting member 2 and the formwork 1 is improved, and the connection stability between the formwork 1 and the formwork 1 is further improved.
In some embodiments, the second sides 12 of two adjacent forms 1 are located in the same plane.
Optionally, the second side surfaces 12 of two adjacent formworks 1 are located on the same plane, so that when the plurality of formworks 1 are subjected to the acting force of the seawater 6, the stress on the plurality of formworks 1 is balanced, and the structural strength of the cofferdam 100 is further improved.
In some embodiments, the number of the first connecting members 21 is set to be plural, the plural first connecting members 21 are arranged at intervals in the height direction (the up-down direction shown in fig. 3) of the formwork 1, the number of the second connecting members 22 is plural, the plural second connecting members 22 are arranged at intervals in the height direction of the formwork 1, and the plural first connecting members 21 and the plural second connecting members 22 are connected in one-to-one correspondence.
Specifically, the first connecting members 21 may be provided in plurality on the formwork 1, and the plurality of first connecting members 21 and the plurality of second connecting members 22 are provided in one-to-one correspondence, so that the connection stability between the formworks 1 can be improved.
Alternatively, the arrangement of the first connecting member 21 and the second connecting member 22 on the formwork 1 may be set according to actual conditions.
For example, the form 1 and the connecting member 2 may be arranged in such a manner that the first connecting member 21 is disposed on the left side of the second side surface 12, and the second connecting member 22 is disposed on the right side of the second side surface 12 of the form 1, or the first connecting member 21 is disposed on the right side of the second side surface 12, and the second connecting member 22 is disposed on the left side of the second side surface 12, so that the plurality of forms 1 are connected as a whole through the sequential connection of the plurality of forms 1, and the balance of the overall stress is better and the stress performance is better.
For example, the formwork 1 includes a first formwork 16, a second formwork 17, and a third formwork 18, in the left-right direction, both sides of the second side surface 12 of the first formwork 16 are provided with first connecting members 21, both sides of the second side surface 12 of the second formwork 17 are provided with second connecting members 22, one side of the second side surface 12 of the third formwork 18 is provided with the first connecting members 21, and the other side of the second side surface 12 of the third formwork 18 is provided with the second connecting members 22.
Optionally, the first connecting member 21 on the side of the first template 16 close to the second template 17 is connected to the second connecting member 22 on the side of the second template 17, the first connecting member 21 on the side of the first template 16 close to the third template 18 is connected to the second connecting member 22 on the third template 18, the second connecting member 22 on the side of the second template 17 close to the third template 18 is connected to the first connecting member 21 on the side of the third template 18, and the arrangement diversity of the templates 1 can be improved by the connection between the connecting hole 2121 on the first connecting member 21 and the connecting pin 2221 on the second connecting member 22.
In some embodiments, the templates 1 have a third side 13 and a fourth side 14 in the width direction (left-right direction as shown in fig. 3), and the third side 13 and the fourth side 14 of two adjacent templates 1 are attached.
Specifically, the third side 13 is located on the left side of the formwork 1, the fourth side 14 is located on the right side of the formwork 1, and the third side 13 and the fourth side 14 are attached to each other, so that the sealing performance between the formwork 1 and the formwork 1 is improved, seawater 6 is prevented from penetrating through a gap between the formworks 1, and the connection stability between the formwork 1 and the formwork 1 is improved.
For example, an adhesive layer may be provided on the third side 13 and the fourth side 14, and the sealing effect between the form 1 and the form 1 may be improved by the adhesive layer.
For example, the adhesive layer may be a waterproof 6 paint.
For example, the third side 13 and the fourth side 14 are provided with lightening holes, the number of the lightening holes can be set to be multiple, the arrangement of the plurality of lightening holes can lighten the weight of the template 1, and the number of the lightening holes and the specific positions of the arrangement are subject to specific implementation.
In some embodiments, the formwork 1 has a filling cavity 15 therein, the filling cavity 15 being adapted to be filled with a filler.
Optionally, each formwork 1 has a filling cavity 15 therein, the filling cavity 15 being adapted to be filled with a filling material, the filling material comprising a first filling material 3 and a second filling material 4.
For example, the first filler 3 is rockfill and the second filler 4 is self-protecting concrete under water 6.
For example, the rockfill fully utilizes local stones or excavation materials, and is directly piled and put into a warehouse as aggregates with large particle size, the construction process is simplified, the rockfill can be made of hard and flakiness-free stone with no cracks, stones with small particle size and more stone slag are avoided, most of the stones in the whole ship are 30.0cm above, and the rockfill with less stone slag is selected, so that the performance of the rockfill is improved, and the structural strength of the cofferdam 100 is further improved.
For example, the self-protecting concrete under water 6 has good pumpability, and in the condition of no vibration, the environmental water 6 is discharged by self weight, the gap between the piled stones can be compactly filled, and the self-protecting concrete under water 6 has no dispersion of the composition materials, keeps viscosity, and has longer strength and durability which can meet the design requirements after the self-protecting concrete under water 6 is hardened.
Optionally, the self-protecting concrete under the water 6 can fill the gap of the template 1 due to good impermeability, and bottom sealing grouting is not needed to be poured at the bottom of the template 1, so that the construction process is simplified, and the construction time is further shortened.
For example, when pouring the self-protecting concrete under the water 6, the material can be received through an excavator bucket, the long-arm excavator directly transfers the self-protecting concrete under the water 6 to a specified pouring point in the template 1 for pouring, in the pouring process, a vibrating device is not needed, and in addition, the template 1 is poured in sequence, so that the arrangement of the transverse warehouse-dividing template 1 in the related technology is cancelled, and the pouring efficiency is improved.
Because the cofferdam 100 of the embodiment of the invention adopts the rockfill and the underwater self-protecting concrete, the hardening of the underwater self-protecting concrete under the water 6 and the rockfill form a whole, the structural stress can be more balanced, the structural stability is better, compared with the cofferdam 100 structure in the related technology, the cofferdam 100 of the embodiment has more durable structural durability, the template 1 can be used as a permanent structure, the process of removing the template is avoided, the construction process is further simplified, and the construction time is shortened.
According to the embodiment of the invention, the rockfill concrete and the underwater 6 self-protecting concrete are applied to the cofferdam 100, the underwater 6 self-protecting concrete is used, so that the construction procedures can be reduced, the rockfill and the underwater 6 self-protecting concrete can discharge the water 6 in the template 1 by means of self weight, the arrangement of the drainage 6 device is reduced, the construction convenience of the cofferdam 100 is improved, and the construction period can be shortened.
The invention also provides a cofferdam construction method, which comprises the following steps: sequentially inserting a plurality of templates into the water bottom, and splicing the templates to enclose an annular space; filling a first filler into the filling cavity, and discharging partial seawater in the template under the action of the first filler; and filling a second filler into the filling cavity, wherein the second filler fills the gap of the first filler under the action of self weight.
For example, when one side of the template is provided with a first connecting piece and the other side of the template is provided with a second connecting piece, one template is placed at a design position, then a second template is placed at an adjacent position, and the templates are sequentially placed until the templates are connected end to form an annular space.
For example, when the templates are a first template, a second template and a third template, the first template and the third template are sequentially placed at the design position, one end of the first template and one end of the third template extend into the preset position of the holding layer, and then the second template is placed, so that the second connecting piece on the second template is connected with the first connecting piece on the first template and the first connecting piece on the third template.
For example, the first filler is rockfill, the rockfill is filled into a filling cavity in the formwork, and seawater in the formwork is discharged from the upper part of the formwork under the action of the rockfill.
For example, the second filler is underwater self-protecting concrete, the underwater self-protecting concrete is filled into a filling cavity in the formwork, the underwater self-protecting concrete can fill gaps of the rockfill under the action of self weight to form complete concrete, and seawater is discharged from the upper part of the formwork.
For example, in the construction process of the underwater self-protecting concrete, a drainage device is not required to be arranged for drainage, and a stirring rod is not required to be used for vibrating, so that the construction process is simplified, and the construction speed is increased.
The underwater self-protecting concrete can be poured in still water, can also be poured in a low-flow-rate water body, and can also adapt to fresh water or ocean, so that the application range of the construction method of the embodiment of the invention is widened.
In some embodiments, before the second filler is filled into the filling cavity, the protective agent is filled into the filling cavity, so that the ratio of the protective agent in the template to the seawater in the template is A, and A is more than 90ppm and less than or equal to 110 ppm.
For example, the protective agent is an underwater protective agent, and the underwater protective agent can change the water property of seawater in the template, inhibit cement in the concrete mixture from dispersing into a water body, avoid the segregation of underwater concrete and improve the strength of the hardened underwater self-protecting concrete.
For example, the underwater protective agent is a water-soluble high molecular polymer, and can modify the water body of seawater in the template into a water-soluble high molecular polymer solution.
The underwater self-protecting concrete has different working principles with concrete in the related technology, before the underwater self-protecting concrete is poured, a water-soluble high polymer underwater protective agent is added into a template, a water body is modified into a water-soluble high polymer solution with extremely low concentration, the cement in a concrete mixture is inhibited from dispersing into the water body, the underwater concrete is prevented from segregating, then the underwater self-protecting concrete is poured into the water body, gaps of rockfill are filled in the underwater self-protecting concrete under the action of self weight and overflow, and the pouring of the underwater self-protecting concrete is completed.
Optionally, after the underwater self-protecting concrete is poured, a leveling layer is arranged above the formwork to prevent the poured concrete from being damaged by the outside, and the leveling layer can be made of mortar.
In some embodiments, the first filler has a volume fraction of 40% to 60% in the filling cavity and the second filler has a volume fraction of 40% to 60% in the filling cavity.
For example, when the first filler occupies 40% of the volume in the filling chamber, the second filler occupies 60% of the volume in the filling chamber, and when the first filler occupies 50% of the volume in the filling chamber, the second filler occupies 50% of the volume in the filling chamber. It can be understood that the sum of the volumes of the first filler and the second filler in the filling cavity is 1, and the invention does not limit the specific proportion of the first filler and the second filler, based on the actually required strength of the cofferdam.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. A cofferdam, characterized in that it comprises:
the template comprises a plurality of templates, wherein the templates are connected end to form an annular space, each template is internally provided with a filling cavity, the filling cavities are suitable for filling fillers, the fillers comprise first fillers and second fillers, the first fillers are rockfill, the second fillers are underwater self-protecting concrete, before the underwater self-protecting concrete is poured, an underwater protective agent of a water-soluble high polymer is added into the templates, a water body is modified into a water-soluble high polymer solution, cement in the concrete mixture is inhibited from dispersing into the water body, the underwater concrete is prevented from segregating, then the underwater self-protecting concrete is poured into the water body, and gaps of the rockfill are filled in the underwater self-protecting concrete under the action of self weight and overflow;
the connecting piece comprises a first connecting piece and a second connecting piece, the first connecting piece is installed on one of two adjacent templates, the second connecting piece is installed on the other template, the first connecting piece is detachably connected with the second connecting piece to connect the two adjacent templates, a connecting hole is formed in the first connecting piece, a connecting pin is arranged on the second connecting piece, and one end of the connecting pin can extend into the connecting hole to connect the first connecting piece with the second connecting piece;
the template is provided with a first side surface and a second side surface in the thickness direction, the second side surfaces of two adjacent templates are positioned on the same plane, the first side surface is arranged close to the annular space relative to the second side surface, the connecting piece is provided with a first end surface and a second end surface in the thickness direction of the template, the second end surface is arranged far away from the template relative to the first end surface, the radian of the second end surface is the same as that of the first side surface, the template is provided with a third side surface and a fourth side surface in the width direction, the third side surface and the fourth side surface of the two adjacent templates are attached, and the third side surface and the fourth side surface are provided with adhesive layers;
the templates comprise a first template, a second template and a third template, in the left and right direction, two sides of the second side surface of the first template are provided with first connecting pieces, two sides of the second side surface of the second template are provided with second connecting pieces, one side of the second side surface of the third template is provided with the first connecting pieces, the other side of the second side surface of the third template is provided with the second connecting pieces, the first connecting pieces on one side of the first template close to the second template are connected with the second connecting pieces on one side of the second template, the first connecting pieces on one side of the first template close to the third template are connected with the second connecting pieces on the third template, the second connecting pieces on one side of the second template close to the third template are connected with the first connecting pieces on one side of the third template, the first connecting piece is connected with the second connecting piece through the connecting hole on the first connecting piece.
2. The cofferdam of claim 1, wherein the number of the first connectors is provided in plurality, a plurality of the first connectors are arranged at intervals in the height direction of the formwork, a plurality of the second connectors are arranged at intervals in the height direction of the formwork, and a plurality of the first connectors and a plurality of the second connectors are connected in a one-to-one correspondence.
3. A cofferdam construction method, wherein the cofferdam is the cofferdam of any one of claims 1-2, comprising: sequentially inserting a plurality of templates into the water bottom, and splicing the templates to enclose an annular space; filling a first filler into the filling cavity, and discharging a part of seawater in the template under the action of the first filler; and filling a second filler into the filling cavity, wherein the second filler fills the gap of the first filler under the action of self weight.
4. The construction method according to claim 3, wherein before the second filler is filled into the filling cavity, a protective agent is filled into the filling cavity, so that the ratio of the protective agent in the formwork to seawater in the formwork is A, and 90ppm < A is less than or equal to 110 ppm.
5. The construction method according to claim 4, wherein the volume proportion of the first filler in the filling cavity is 40-60%, and the volume proportion of the second filler in the filling cavity is 40-60%.
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| CN202210662874.8A CN114737583B (en) | 2022-06-13 | 2022-06-13 | Cofferdam and construction method |
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| CN202210662874.8A CN114737583B (en) | 2022-06-13 | 2022-06-13 | Cofferdam and construction method |
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| CN202689015U (en) * | 2012-07-12 | 2013-01-23 | 中铁二十局集团第一工程有限公司 | Double-wall steel cofferdam for high-span prestressed concrete continuous beam deep water pier construction |
| CN205918121U (en) * | 2016-06-06 | 2017-02-01 | 富于安（福建）环保模板有限公司 | Multi -functional connecting piece for building templates |
| CN210712827U (en) * | 2019-06-17 | 2020-06-09 | 北京市市政四建设工程有限责任公司 | Steel casing |
| CN211571756U (en) * | 2019-12-25 | 2020-09-25 | 叶建公 | Additional strengthening for water conservancy construction cofferdam |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6402207B2 (en) * | 2017-01-10 | 2018-10-10 | 日本データーサービス株式会社 | Repair formwork panel, repair formwork system and underwater structure repair method using the same |
| CN209923954U (en) * | 2018-11-29 | 2020-01-10 | 张伟 | Cofferdam for water conservancy construction |
| US11530521B2 (en) * | 2020-08-12 | 2022-12-20 | Beech Contractors, LLC | Seawall construction using concrete forms |
| CN215562722U (en) * | 2021-06-25 | 2022-01-18 | 广东省建筑工程机械施工有限公司 | Underwater steel cofferdam splicing structure and underwater steel cofferdam |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202689015U (en) * | 2012-07-12 | 2013-01-23 | 中铁二十局集团第一工程有限公司 | Double-wall steel cofferdam for high-span prestressed concrete continuous beam deep water pier construction |
| CN205918121U (en) * | 2016-06-06 | 2017-02-01 | 富于安（福建）环保模板有限公司 | Multi -functional connecting piece for building templates |
| CN210712827U (en) * | 2019-06-17 | 2020-06-09 | 北京市市政四建设工程有限责任公司 | Steel casing |
| CN211571756U (en) * | 2019-12-25 | 2020-09-25 | 叶建公 | Additional strengthening for water conservancy construction cofferdam |
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| CN114737583A (en) | 2022-07-12 |
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