CN218233537U - Single double-wall steel cofferdam for bridge construction - Google Patents
Single double-wall steel cofferdam for bridge construction Download PDFInfo
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- CN218233537U CN218233537U CN202222190150.6U CN202222190150U CN218233537U CN 218233537 U CN218233537 U CN 218233537U CN 202222190150 U CN202222190150 U CN 202222190150U CN 218233537 U CN218233537 U CN 218233537U
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Abstract
The utility model discloses a single-double-wall steel cofferdam for bridge construction, which comprises a single-double-wall steel cofferdam body, wherein the single-double-wall steel cofferdam body is surrounded by four side plates; the side plate comprises a single-wall cofferdam section and a double-wall cofferdam section which are arranged from top to bottom, the single-wall cofferdam section comprises a first outer wall plate, and the double-wall cofferdam section comprises a second outer wall plate and a second inner wall plate which are arranged in parallel at intervals; a plurality of partition plates are vertically arranged between the second outer wall plate and the inner wall plate, and a plurality of horizontal ring plates and horizontal oblique rods are transversely arranged. The utility model discloses simplify the construction procedure, shortened the time limit for a project, solved the difficult problem of deep water bridge foundation construction, ensured the cofferdam and transferred the accurate positioning of in-process, construction cost has been practiced thrift to the utilization ratio of abundant performance material.
Description
Technical Field
The utility model relates to a bridge construction technical field, concretely relates to single double-walled steel cofferdam of bridge construction usefulness.
Background
At present, the steel cofferdam is widely applied to the foundation construction of a large bridge with a plurality of advantages. With the large-scale investment of China in the field of infrastructure, a large number of grand bridges crossing the river and the sea are built in succession, and the grand bridges are usually required to build huge pier foundations in deep water. In order to create a good environment for the construction of the pier foundation, cofferdam construction is required.
The construction cofferdams of the current pier foundation mostly adopt steel cofferdams, and the most commonly used steel cofferdams comprise a steel sheet pile cofferdam, a steel pipe pile cofferdam, a single-wall steel cofferdam and a double-wall steel cofferdam. The steel sheet pile cofferdam has poor anti-scouring capability and small rigidity, and is only suitable for water areas with small flow velocity; the peripheral steel water retaining plate of the steel pipe pile cofferdam needs a large amount of underwater welding construction operation, and when the water retaining height is large, the construction cost is greatly increased, and the economical efficiency is reduced; the single-wall steel hanging box cofferdam sinks by self weight due to the structural stress characteristic, and is suitable for a shallower water layer; the double-wall steel cofferdam is suitable for complicated hydrogeological conditions, and has the advantages of high overall rigidity, deeper sinking, larger size, relatively complex structure and increased construction cost.
Disclosure of Invention
The utility model discloses the problem that will solve is: the single-double-wall steel cofferdam for bridge construction simplifies construction steps, shortens construction period, solves the difficult problem of foundation construction of deep-water bridges, ensures accurate positioning in the process of lowering the cofferdam, gives full play to the utilization rate of materials, and saves construction cost.
The utility model discloses a solve the technical scheme that above-mentioned problem provided and do: a single-double-wall steel cofferdam for bridge construction comprises a single-double-wall steel cofferdam body, wherein the single-double-wall steel cofferdam body is formed by encircling four side plates;
the side plate comprises a single-wall cofferdam section and a double-wall cofferdam section which are arranged from top to bottom, the single-wall cofferdam section comprises a first outer wall plate, and the double-wall cofferdam section comprises a second outer wall plate and a second inner wall plate which are arranged in parallel at intervals; a plurality of partition boards are vertically arranged between the second outer wall board and the inner wall board, and a plurality of horizontal ring boards and horizontal oblique rods are transversely arranged.
Preferably, the first outer wall plate and the second outer wall plate are integrally formed.
Preferably, the lower end of the double-walled weir segment is cusp-shaped.
Preferably, C30 concrete is filled between the second outer wall plate and the inner wall plate.
Preferably, a plurality of communicating pipes are transversely arranged on the double-wall cofferdam section, and the distance between each communicating pipe and the bottom of the single-double-wall steel cofferdam body is 3m.
Preferably, vertical stiffening angle steel is arranged between the second outer wall plate and the inner wall plate.
Preferably, two layers of guide are transversely arranged on the inner side of the inner wall plate, the distance between the first layer and the bottom of the single-double-wall steel cofferdam body is 2.5m, and the distance between the second layer and the bottom of the single-double-wall steel cofferdam body is 5.8m.
Preferably, two inner supports are transversely arranged between the two oppositely arranged side plates.
Preferably, a cushion seat and a cushion plate are arranged at the joint of the inner support and the inner wall plate.
Preferably, the distance between the second outer wall plate and the inner wall plate is 100cm.
Compared with the prior art, the utility model has the advantages that: the utility model discloses a steel cofferdam material itself can resist the intensity of the external pressure of soil, and it is not only waterproof, but also can rely on the intensity and the rigidity of steel itself to resist external water and soil pressure. The single-double wall steel cofferdam is an integral structure mainly composed of an inner wall plate, an outer wall plate I, an outer wall plate II, a partition plate, a horizontal ring plate and an inner support. A certain number of partition boards, horizontal ring boards and horizontal inclined rods are arranged around the steel cofferdam along the inner wall board, the outer wall board I and the outer wall board II, so that the structure is more stable. The strength and the rigidity of the composite material are suitable for deep water bridge foundation construction; two layers of guide structures are vertically arranged on the inner side of an inner wall plate of the single double-wall steel cofferdam so as to ensure the accurate positioning of the cofferdam in the lowering process. The bottom end of the single-double-wall steel cofferdam is provided with a pointed end and inclines inwards, so that the sinking and fixing of the cofferdam in a riverbed are guaranteed. The coordination and stability of the cofferdam in the whole hoisting and lowering process are ensured; the single-double wall cofferdam realizes the standardization and serialization of factory prefabrication processing, block manufacturing in a field and section assembly. The cofferdam can be constructed in any season, deep water, thick covering layer and the like, can be recycled, can save certain materials compared with a double-wall steel cofferdam, gives full play to the utilization rate of the materials, and reduces the cost.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it.
Fig. 1 is a top view of the present invention;
fig. 2 is a schematic side plate of the present invention;
FIG. 3 is a vertical layout of the communicating tubes of the present invention;
FIG. 4 is a view of the guiding floor arrangement of the present invention;
fig. 5 is a schematic view of the internal support mounting structure of the present invention;
fig. 6 is a schematic view of the vertical stiffening angle steel of the present invention.
The attached drawings are marked as follows: 1. a first outer wall plate 2, an inner wall plate 3, a horizontal inclined rod 4, a communicating pipe 5, an inner support 6 and a second outer wall plate, 7, a partition plate, 8, a horizontal ring plate, 9, a guide plate, 10, a cushion seat, 11, a cushion plate, 12 and vertical stiffening angle steel.
Detailed Description
The following detailed description will be provided with reference to the accompanying drawings and examples, so that how to implement the technical means of the present invention to solve the technical problems and achieve the technical effects can be fully understood and implemented.
In the description of the present invention, it should be noted that, for the terms of orientation, there are terms such as "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicating the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.
Furthermore, if any, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise explicitly defined or limited, the terms "assembled", "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; mechanical connection is also possible; the two elements can be directly connected with each other or connected with each other through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention. As used in the description of the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The specific embodiment of the utility model is shown in the attached drawings, a single double-wall steel cofferdam for bridge construction, which comprises a single double-wall steel cofferdam body, wherein the single double-wall steel cofferdam body is formed by four side plates in a surrounding way;
the side plates comprise single-wall cofferdam sections and double-wall cofferdam sections which are arranged from top to bottom, the single-wall cofferdam sections comprise outer wall plates I1, and the double-wall cofferdam sections comprise outer wall plates II 6 and inner wall plates 2 which are arranged in parallel at intervals; a plurality of partition boards 7 are vertically arranged between the second outer wall board 6 and the inner wall board 2, and a plurality of horizontal ring boards 8 and horizontal inclined rods 3 are transversely arranged.
The overall plane size of the first outer wall plate and the second outer wall plate is 13.5 multiplied by 9.3m, and the plane size of the inner wall plate is 11.5 multiplied by 7.3m; the partition plates are 12 in particular, and the horizontal ring plates are 10 in particular.
Wherein, the curb plate all divides into 12 along the girth. The unit blocks of the side plate are connected by welding seams and are installed in sections.
As a further improvement of this embodiment, the first outer wall plate 1 and the second outer wall plate 6 are integrally formed.
As a further improvement of this embodiment, the lower end of the double-walled weir segment is cusp-shaped.
As a further improvement of this embodiment, C30 concrete is filled between the second outer wall panel 6 and the inner wall panel 2.
As the further improvement of this embodiment, horizontal arrangement has a plurality of communicating pipes 4 on the double-walled cofferdam section, 4 communicating pipes are specific 8 apart from single double-walled steel cofferdam body bottom, communicating pipe, and communicating pipe is used for adjusting inside and outside water level balance, must block up when the operating mode draws water.
As a further improvement of the embodiment, vertical stiffening angle steels 12 are arranged between the second outer wall plate 6 and the inner wall plate 2. Wherein, vertical stiffening angle steel can play good supporting role, reinforcing structure's stability. When the communicating pipe collides with the vertical stiffening angle steel, the vertical stiffening angle steel can be reversed.
As a further improvement of this embodiment, two layers of guides 9 are transversely arranged on the inner side of the inner wall plate 2, the first layer is 2.5m away from the bottom of the single-double-wall steel cofferdam body, and the second layer is 5.8m away from the bottom of the single-double-wall steel cofferdam body. And part of the guiding is also used as a cofferdam lowering lifting point, so that the precise positioning of the cofferdam in the lowering process is ensured.
As a further improvement of the embodiment, two inner supports 5 are transversely arranged between the two oppositely arranged side plates, and the vertical distance between the inner supports and the cofferdam bottom is 6.6m.
Furthermore, a pad seat 10 and a pad plate 11 are arranged at the joint of the inner support 5 and the inner wall plate 2.
As a further improvement of the embodiment, the distance between the second outer wall plate 6 and the inner wall plate 2 is 100cm.
Wherein, the single-double wall cofferdam is assembled in sections and integrally lowered. The specific process comprises the following steps: construction of a bored pile → partial dismantling of a bored platform → processing and assembling of a cofferdam → installation of a cofferdam suspension system → downward placing of the cofferdam → pouring of bulkhead concrete → pouring of cofferdam bottom sealing concrete → pumping of the cofferdam → construction of a cushion cap → dismantling of the cofferdam at a low water level.
The utility model discloses the concrete implementation step does:
the method comprises the following steps: the single-double-wall cofferdam is manufactured in a partitioning mode in a field, when the cofferdam side plate is machined, the outer wall plate, the inner wall plate, the compartment partition plate and the vertical stiffening angle steel are welded firmly, the horizontal ring plate and the horizontal inclined rod are welded through three-way welding with the h & =10mm, structural welding seams of the outgoing cofferdam need to be checked, and the butt welding seams of the outer wall plate and the inner wall plate need to pass a kerosene penetration test. The wallboard stiffening angle steel and the top section stiffening angle steel are arranged in a one-to-one correspondence mode. And the cofferdam area is cleaned by a long-arm excavator to ensure the thickness of the bottom sealing concrete. And then the drilling platform is dismantled, and the cofferdam assembly platform is installed.
Step two: and hoisting the cofferdam side plates by blocks by adopting a 75t crawler crane, assembling the cofferdam, welding the assembled cofferdam side plates into a whole, performing a cofferdam water tightness test, and then installing a hanging and lowering system.
Step three: and lifting the single-double-wall cofferdam by 5cm, selecting the time with lower water flow speed for lowering, and lowering to a shallow position or self-floating after determining that no fault exists, so as to remove the system for lowering the cofferdam. And (3) carrying out assembling and lengthening on a second layer, namely the single-wall cofferdam, pouring concrete into the cofferdam wall bin and pouring water into the side wall of the cofferdam after the assembling and lengthening of the single-wall cofferdam and the double-wall cofferdam are in place and the welding is finished. Then, a long-arm excavator or mud suction is used for locally cleaning the riverbed, and the cofferdam is sunk in place.
Step four: and installing a cofferdam back cover platform and pouring cofferdam back cover concrete. After the concrete construction is finished, pumping water to the right position by the cofferdam, cutting off the steel casing and chiseling off the pile head. And finally, binding the bearing platform steel bars and pouring bearing platform concrete. And (4) selecting a low water level to remove the inner support 6 of the cofferdam and cut off the side plates of the cofferdam to finish the construction of the cofferdam.
The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to be changed. All changes which come within the scope of the independent claims of the invention are to be embraced within their scope.
Claims (10)
1. The utility model provides a single double-walled steel cofferdam of bridge construction usefulness which characterized in that: the cofferdam comprises a single-double-wall steel cofferdam body, wherein the single-double-wall steel cofferdam body is formed by encircling four side plates;
the side plates comprise single-wall cofferdam sections and double-wall cofferdam sections which are arranged from top to bottom, the single-wall cofferdam sections comprise first outer wall plates (1), and the double-wall cofferdam sections comprise second outer wall plates (6) and second inner wall plates (2) which are arranged in parallel at intervals; a plurality of partition boards (7) are vertically arranged between the outer wall board II (6) and the inner wall board (2), and a plurality of horizontal ring boards (8) and horizontal oblique rods (3) are transversely arranged.
2. The single double-wall steel cofferdam for bridge construction according to claim 1, wherein: the outer wall plate I (1) and the outer wall plate II (6) are integrally formed.
3. The single double-wall steel cofferdam for bridge construction according to claim 1, wherein: the lower end of the double-wall cofferdam section is in a pointed shape.
4. The single double-wall steel cofferdam for bridge construction according to claim 1, wherein: c30 concrete is filled between the second outer wall plate (6) and the inner wall plate (2).
5. The single-double wall steel cofferdam for bridge construction of claim 1, wherein: a plurality of communicating pipes (4) are transversely arranged on the double-wall cofferdam section, and the distance between each communicating pipe (4) and the bottom of the single-double-wall steel cofferdam body is 3m.
6. The single double-wall steel cofferdam for bridge construction according to claim 1, wherein: vertical stiffening angle steel (12) is arranged between the second outer wall plate (6) and the inner wall plate (2).
7. The single double-wall steel cofferdam for bridge construction according to claim 1, wherein: two layers of guide (9) are transversely arranged on the inner side of the inner wall plate (2), the distance between the first layer and the bottom of the single-double-wall steel cofferdam body is 2.5m, and the distance between the second layer and the bottom of the single-double-wall steel cofferdam body is 5.8m.
8. The single-double wall steel cofferdam for bridge construction of claim 1, wherein: two inner supports (5) are transversely arranged between the two oppositely arranged side plates.
9. The single-double-wall steel cofferdam for bridge construction according to claim 8, wherein: and a cushion seat (10) and a cushion plate (11) are arranged at the joint of the inner support (5) and the inner wall plate (2).
10. The single double-wall steel cofferdam for bridge construction according to claim 1, wherein: and the distance between the second outer wall plate (6) and the inner wall plate (2) is 100cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222190150.6U CN218233537U (en) | 2022-08-19 | 2022-08-19 | Single double-wall steel cofferdam for bridge construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222190150.6U CN218233537U (en) | 2022-08-19 | 2022-08-19 | Single double-wall steel cofferdam for bridge construction |
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| Publication Number | Publication Date |
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| CN218233537U true CN218233537U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222190150.6U Active CN218233537U (en) | 2022-08-19 | 2022-08-19 | Single double-wall steel cofferdam for bridge construction |
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| CN (1) | CN218233537U (en) |
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- 2022-08-19 CN CN202222190150.6U patent/CN218233537U/en active Active
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