CN218521821U - Steel cofferdam - Google Patents

Abstract

The utility model relates to a bridge construction field, concretely relates to steel cofferdam, include the bottom plate and the cofferdam body that connects into by multisection annular cofferdam, its characterized in that: the cofferdam comprises a cofferdam body and is characterized in that a positioning groove is formed in the circumferential direction of the bottom plate, positioning plates inserted into the positioning groove are arranged in the circumferential direction of the bottom of the cofferdam body, each section of the annular cofferdam comprises a plurality of side plates, each side plate comprises an inner plate and an outer plate, an inter-plate supporting part is arranged between each inner plate and each outer plate, and concrete is filled in each side plate at the lower part of the cofferdam body. By implementing the scheme, the risk that the steel cofferdam is easy to deform in the deepwater and rapid stream environment is solved.

Description

Steel cofferdam

Technical Field

The utility model relates to a bridge construction field, concretely relates to steel cofferdam.

Background

The steel cofferdam is a water-blocking structure for the construction of the bearing platform, and provides a water-free dry environment for the construction of the bearing platform. Along with the continuous development of bridge construction, river-crossing and sea-crossing bridges are more and more, so that the bridge construction is located in a deep water area, the deeper the water depth is, the greater the construction difficulty is, the higher the performance requirement on the steel cofferdam is, particularly the higher the compression resistance of the steel cofferdam is, and if the steel cofferdam is in a rainy season or in a torrent terrain environment, the stronger torrent has larger one-way impact force on the steel cofferdam. Therefore, the steel cofferdam which is more suitable for the deepwater torrent environment needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is anticipated to provide a steel cofferdam to solve the steel cofferdam and easily exist the risk of deformation in deep water torrent environment.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a steel cofferdam comprises a bottom plate and a cofferdam body formed by connecting a plurality of sections of annular cofferdams, wherein a positioning groove is formed in the circumferential direction of the bottom plate, a positioning plate used for being inserted into the positioning groove is arranged in the circumferential direction of the bottom of the cofferdam body, each section of annular cofferdam is formed by a plurality of side plates, a separation cabin plate is arranged between every two adjacent side plates, each side plate comprises an inner plate and an outer plate, an inter-plate supporting part is arranged between each inner plate and each outer plate, and concrete is filled in the separation cabin plate positioned at the lower part of the cofferdam body.

The principle and the advantages of the scheme are as follows:

1. the positioning grooves and the positioning plates are arranged at the bottom of the bottom plate and the cofferdam body, so that the cofferdam body can be quickly positioned during installation, the cofferdam body is more accurately installed at the specified position of the bottom plate, and the construction processes of trial and error and alignment are reduced; on the other hand, the transverse stability of the cofferdam body is further enhanced, so that the risk that the cofferdam body rolls in special environments such as rapid flows is reduced. In addition, concrete is filled in the compartment plates at the lower part of the cofferdam body so as to enhance the stability of the bottom of the cofferdam body and the connection strength of the cofferdam body.

2. Because water pressure is great in the deep water district, the cofferdam body that is located the bottom has the risk of local by the pressure deformation, or meets the relief environment of rainy season or torrent, stronger torrent is great to the one-way impact force of steel cofferdam, there is the risk of steel cofferdam by impact deformation equally, because the steel cofferdam is formed by the welding of multisection annular cofferdam, every section annular cofferdam is formed by the welding of polylith curb plate, consequently the welding seam is more, when the steel cofferdam has local deformation, its welding seam department very easily causes the fracture phenomenon and leads to the problem of leaking. Consequently, the side plate of cofferdam body is designed into and is become and set up the inter-plate supporting part by inner panel and planking at its middle part in this scheme, so with inner panel and planking connection for whole stability in order to strengthen whole curb plate to strengthen the compressive capacity of cofferdam body.

Preferably, as an improvement, a plurality of inner supporting rods are horizontally arranged in the annular cofferdam, and because the pressure difference between the inside and the outside of the annular cofferdam is larger in a partial deepwater area, in order to avoid the annular cofferdam from being extruded and deformed, the plurality of inner supporting rods are arranged in the annular cofferdam for radial supporting.

Preferably, as an improvement, the bottom plate is provided with a concrete bottom lining. Through the arrangement of the concrete bottom lining, the transverse stability of the cofferdam body is further enhanced, and the problems that the cofferdam body is inclined and the like under special environments such as rapid flows are avoided.

Preferably, as an improvement, a steel reinforcement framework is buried in the concrete bottom lining, and the overall strength of the bottom of the scheme is enhanced through the arrangement.

Preferably, as an improvement, still include vertical floor, vertical floor connects on the inner panel of two section at least annular cofferdams, further connects two section at least annular cofferdams as an organic whole through vertical rib for the junction between each annular cofferdam is more firm, avoids producing great transverse thrust and leading to the problem that the junction splits to annular cofferdam under the torrent effect.

Preferably, as an improvement, the inner supporting rod comprises a connecting rod, supporting blocks are arranged at two ends of the connecting rod, the length of the connecting rod is adjustable, and the supporting blocks at the two ends of the connecting rod are enabled to be in closer contact with the inner wall of the annular cofferdam by setting the length of the connecting rod to be adjustable, so that the annular cofferdam is more firmly supported from the radial direction; meanwhile, because the inner diameter of the annular cofferdam has an error, the problem that a gap generated by the error or the annular cofferdam cannot stretch into the gap can be solved through the arrangement; in addition, the inner supporting rod is convenient to store and transport through the arrangement.

Preferably, as an improvement, the connecting rods include a first connecting rod and a second connecting rod, and the first connecting rod is screwed on the second connecting rod. Through the setting, when the length of support rod is adjusted, only need rotate head rod or second connecting rod and can accomplish.

Preferably, as an improvement, a bearing is provided between one of the support blocks and the first connecting rod or the second connecting rod. Through the arrangement, when the length of the connecting rod is continuously adjusted after the supporting block is contacted with the inner wall of the annular cofferdam, the problem that the supporting block and the inner plate are seriously abraded due to the fact that the supporting block rotates along with the connecting rod can be avoided.

Preferably, as an improvement, the first connecting rod and the second connecting rod are respectively provided with a plurality of rows of fixing holes corresponding to each other. In order to strengthen the supporting strength of the inner supporting rod on the radial direction of the annular cofferdam, through the arrangement, after the connecting rods are adjusted in place, the first connecting rod and the second connecting rod are locked in the circumferential direction through the additional fixing piece, so that when the external pressure is large, the connecting rods can be locked and disabled, powerful support can be realized through the locking of the fixing holes, and the supporting stability of the inner supporting rod is effectively ensured.

Preferably, as an improvement, the top of the inner plate and the top of the outer plate are both provided with a high-connection ring plate for connecting an upper section of annular cofferdam, and the sealing performance of the joint of each section of annular cofferdam is enhanced by arranging the high-connection ring plate.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of the annular cofferdam of the present invention at the high place.

Fig. 3 is a schematic structural view of the high place where the compartment plate of the present invention is connected.

Fig. 4 is a schematic structural view in the direction 1-1 in fig. 3.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the structure comprises a bottom plate 1, an annular cofferdam 2, a positioning plate 3, an inner plate 4, an outer plate 5, a horizontal truss 6, a concrete bottom liner 7, a compartment partition plate 8, a thickened wall plate 9, a reinforcing plate 10, a high-connection ring plate 11, a high-connection stiffening plate 12, a first connecting rod 13, a second connecting rod 14, a supporting block 15 and a bearing 16.

The embodiment is basically as shown in the attached figure 1: the utility model provides a steel cofferdam, includes bottom plate 1 and the cofferdam body that forms by the welding of multisection annular cofferdam 2, eight at least constant head tanks have been seted up to 1 circumference of bottom plate, and the welding of the bottom circumference of cofferdam body has eight at least locating plates 3 that are used for pegging graft into the constant head tank, and behind locating plate 3 inserted the constant head tank, can be with both welded fastening or bolt fastening. Each section of annular cofferdam 2 comprises the welding of polylith curb plate, and it is 1.5m to constitute and curb plate thickness by 14 blocks of curb plates in this scheme, and the curb plate includes inner panel 4 and planking 5, vacuole formation between inner panel 4 and the planking 5, and the welding has the supporting part between the board between inner panel 4 and the planking 5, and the supporting part is used for supporting inner panel 4 and planking 5 and makes it keep balance between the board, connects inner panel 4 and planking 5 as whole stability in order to strengthen whole curb plate simultaneously. The inter-plate supporting part comprises horizontal ring plates horizontally welded on the opposite surfaces of the inner plate 4 and the outer plate 5 respectively and horizontal trusses 6 welded on the two horizontal ring plates. C30 concrete is filled in the side plate at the lower part of the cofferdam body, and the filling height is 5-10m. A bottom plate 1 in the cofferdam body is filled with a layer of concrete bottom liner 7, and C40 concrete is poured at one time according to an underwater concrete pouring construction process.

The cabin separation plates 8 are welded between the adjacent side plates, the cabin separation plates 8 are hollow and penetrate through the upper portion and the lower portion, and the positions of the upper cabin separation plate 8 and the lower cabin separation plate 8 correspond to each other when the annular cofferdams 2 are welded. And high annular connecting plates 11 for connecting the upper section of the annular cofferdam 2 are welded at the tops of the side plates and the bulkhead plates 8. As shown in fig. 2: mounting grooves for inserting the side plates are formed in the upper ends and the lower ends of the high-ring connecting plates 11 on the side plates, the high-ring connecting plates 11 are arranged in an end-to-end connection mode along the circumferential direction of the annular cofferdam 2, the side plates of a section of the annular cofferdam 2 can be quickly positioned when being mounted by arranging the mounting grooves in the high-ring connecting plates 11, meanwhile, the upper annular cofferdam 2 and the lower annular cofferdam 2 can be accurately corresponding to each other, and the dislocation phenomenon is effectively avoided; in addition, the stability of the joint of the upper annular cofferdam 2 and the lower annular cofferdam is enhanced. The triangular high-connecting stiffening plates 12 are welded at the high-connecting ring plates 11 on the inner side of the annular cofferdam 2, and the upper end and the lower end of each high-connecting stiffening plate 12 are respectively welded on the upper annular cofferdam 2 and the lower annular cofferdam 2 so as to enhance the stability of the joint of the two adjacent sections of annular cofferdams 2.

As shown in fig. 3 and 4: the high annular plate 11 that connects that is located on the compartment board 8 is the flat board of rectangle, and dull and stereotyped width is greater than curb plate thickness, has thickening wallboard 9 at the vertical welding in outside of compartment board 8, and thickening wallboard 9 welds on two compartment boards 8 from top to bottom, and vertical evenly distributed welding has a plurality of stiffening plates 10 on the thickening wallboard 9 to the stability of compartment board 8 junction about strengthening.

A plurality of inner supporting rods are arranged in the annular cofferdam 2 in a criss-cross manner, each inner supporting rod comprises a connecting rod with adjustable length, supporting blocks 15 are connected to two ends of each connecting rod, each connecting rod comprises a first connecting rod 13 and a second connecting rod 14 which are in threaded connection with each other, and a bearing 16, such as an optional thrust bearing 16, is arranged between the left supporting block 15 and the first connecting rod 13. All vertically seted up the mutual corresponding fixed orifices of multirow on first connecting rod 13 and second connecting rod 14, every row distributes two fixed orifices, and the fixed orifices is connected with the mounting, and the optional bolt of mounting puts in place when inner support bar length adjustment, with the bolt-up in the fixed orifices on first connecting rod 13 and second connecting rod 14.

The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (10)

1. The utility model provides a steel cofferdam, includes the bottom plate and the cofferdam body that connects into by multisection annular cofferdam, its characterized in that: the cofferdam comprises a cofferdam body and is characterized in that a positioning groove is formed in the circumferential direction of the bottom plate, positioning plates inserted into the positioning groove are arranged in the circumferential direction of the bottom of the cofferdam body, each section of the annular cofferdam comprises a plurality of side plates, each side plate comprises an inner plate and an outer plate, an inter-plate supporting part is arranged between each inner plate and each outer plate, and concrete is filled in each side plate at the lower part of the cofferdam body.

2. A steel cofferdam according to claim 1, characterized in that: and a plurality of inner supporting rods are horizontally arranged in the annular cofferdam.

3. A steel cofferdam according to claim 2, characterized in that: the bottom plate is provided with a layer of concrete bottom lining.

4. A steel cofferdam according to claim 3, characterized in that: and a steel reinforcement framework is embedded in the concrete bottom lining.

5. A steel cofferdam according to claim 4, characterized in that: the vertical rib plate is connected to the inner plates of the at least two sections of annular cofferdams.

6. A steel cofferdam according to claim 5, characterized in that: the inner supporting rod comprises a connecting rod, supporting blocks are arranged at two ends of the connecting rod, and the length of the connecting rod is adjustable.

7. A steel cofferdam according to claim 6, characterized in that: the connecting rod includes head rod and second connecting rod, and head rod threaded connection is on the second connecting rod.

8. A steel cofferdam according to claim 7, characterized in that: a bearing is arranged between one of the supporting blocks and the first connecting rod or the second connecting rod.

9. A steel cofferdam according to claim 8, characterized in that: the first connecting rod and the second connecting rod are provided with a plurality of rows of fixing holes corresponding to each other.

10. A steel cofferdam according to claim 1 or 9, characterized in that: and the top parts of the inner plate and the outer plate are provided with high annular plates for connecting an upper section of annular cofferdam.

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