CN216787175U - Weir mould integration double-walled steel cofferdam of vertical hidden purlin - Google Patents
Weir mould integration double-walled steel cofferdam of vertical hidden purlin Download PDFInfo
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Abstract
A weir-die integrated double-wall steel cofferdam of vertical hidden type enclosing purlins is formed by stacking and welding multiple layers of steel cofferdams, each layer of steel cofferdam is formed by welding four right-angle plates and multiple plane plates in a surrounding manner, an inner support is arranged in the inner cavity of each layer of steel cofferdam, each right-angle plate and each plane plate comprise an inner wall plate and an outer wall plate, multiple layers of horizontal ring plates connected through a horizontal support rod are respectively arranged on the inner wall plate and the outer wall plates, a partition plate is sealed and welded at one side between the inner wall plate and the outer wall plate, two vertical enclosing purlins welded and fixed with the wall plates are respectively welded at two ends of the inner side of the partition plate, a vertical enclosing purlin is also respectively fixed at the inner sides of the two plate walls at the other side between the inner wall plate and the outer wall plate, and an enclosing purlin support is fixedly connected between the two corresponding vertical enclosing purlins; the welding of two adjacent plates is the welding of one side of one plate with a partition plate and the other side without the partition plate. The cofferdam is convenient and fast to construct, the steel consumption is less, and the cofferdam has better economic benefits.
Description
Technical Field
The utility model relates to the technical field of bridge foundation construction devices, in particular to a weir-die integrated double-wall steel cofferdam of a vertical hidden purlin.
Background
With the vigorous development of the bridge construction industry in China and the development of scientific technology and the continuous accumulation of construction experience, the construction technology of underwater foundations is continuously developed, and the technology from open caisson and caisson technology to pile foundations, pipe column foundations, steel sheet pile cofferdam technology and the like and the later application of double-bearing-platform steel pipe pile foundations and the like correspondingly solves some problems of underwater foundation construction.
The double-wall steel cofferdam is used as a new technology in bridge deepwater foundation construction, and the double-wall steel cofferdam of the bridge foundation is used as a bearing platform construction water retaining structure to provide a dry operation environment for bridge foundation construction; and the second is used as a support structure of the drilling platform, and the borne load comprises water flow impact force, water head pressure and vertical force acted by the drilling platform. The foundation and the abutment can be dismantled after the foundation and the abutment are built out of the water, so that water flow and navigation channel blockage is avoided, and the foundation and the abutment are widely applied to construction of a plurality of super bridge deep water foundations. The publication also reports on some double-walled steel cofferdams, for example:
1. chinese patent: a double-walled steel cofferdam, application No.: 201610375079.5, filing date: 2016.05.31, abstract: the utility model discloses a double-wall steel cofferdam.A concrete reinforcing block (2) is arranged at a crossed region (1) of a transverse cofferdam (5) and an inner supporting rod (3) of the double-wall steel cofferdam. The concrete reinforcing block (2) is made of C25 filled concrete. The concrete reinforcing blocks are arranged at the cross positions of the double-wall steel cofferdam and the support rods, so that the stress of the area can be reduced, the strain of the rod pieces is reduced, the overlarge regional stress caused by strain diffusion is prevented, the section sizes of the main stress rod pieces of the vertical ribs and the flat ribs in other areas of the double-wall steel cofferdam are reduced, and the steel consumption of the double-wall steel cofferdam is reduced. The C25 concrete is filled in the cross area to form the concrete reinforcing block, so that the local compressive strength can be increased, the stress requirement is met, and the overall stability is ensured.
2. Chinese patent: a double-walled steel cofferdam, application No.: 201721278892.7, filing date: 2017.09.29, abstract: the utility model provides a double-wall steel cofferdam which comprises a cofferdam body, wherein the inner wall of the cofferdam body is provided with a plurality of guiding devices matched with the side walls of steel casing cylinders, each guiding device comprises a panel, a connecting rod and a guiding plate, the panel is fixedly connected to the inner wall of the cofferdam body, and two ends of each connecting rod are respectively connected with the panel and the corresponding guiding plate. When the double-wall steel cofferdam of the technical scheme is adopted, when the double-wall steel cofferdam is positioned and installed, only any two guide devices on the inner wall of the cofferdam body are required to be matched and positioned with the outer wall of the steel casing, and then the double-wall steel cofferdam is slowly lowered to realize the positioning and installation of the steel casing, so that the operation is simple and convenient, and the guide devices are arranged on the inner wall of the cofferdam body, so that the volume of the double-wall steel cofferdam is reduced, the hoisting control of the double-wall steel cofferdam is facilitated, and the clamping of the double-wall steel cofferdam in the hoisting process is avoided; the guide device comprises a panel, a connecting rod and a guide plate, so that the guide device is convenient to disassemble and assemble.
3. Chinese patent: two-wall steel cofferdam of low pile cap in aquatic, application number: 201020600814.6, filing date: 2010.11.11, abstract: the utility model provides an aquatic low pile cap double-walled steel cofferdam, belongs to bridge construction technical field, characterized by: the inner wall plate and the outer wall plate are integrally fixed through the box-shaped beam to form the inner wall and the outer wall of the cofferdam, the inner wall plate and the outer wall plate are fixedly combined through the horizontal truss, the box-shaped wall body is reinforced and supported through the horizontal inner support and the vertical support rod, the blade foot is wedge-shaped, and the steel casing is provided with the bracket, the bottom section assembling platform, the lower guide frame and the lower reaction frame. The beneficial effects are that: the underwater low pile cap double-wall steel cofferdam system has clear stress and simple structure, can ensure the safety of the construction external environment better by using the system, and reduces the cost.
4. Chinese patent: a double-walled steel cofferdam, application No.: 201721880579.0, filing date: 2017.12.28, abstract: the utility model discloses a double-wall steel cofferdam, which comprises a first section of cofferdam, a second section of cofferdam, a third section of cofferdam and a fourth section of cofferdam, wherein the bottom of the first section of cofferdam is a blade foot, the top of the first section of cofferdam is connected with the bottom of the second section of cofferdam, the top of the second section of cofferdam is connected with the bottom of the third section of cofferdam, the top of the third section of cofferdam is connected with the bottom of the fourth section of cofferdam, and the second, third and fourth sections of cofferdams have the same structure, and the double-wall steel cofferdam has the advantages that: the whole cofferdam is completely manufactured in a field partitioning mode, the cofferdam is conveyed to a pier position assembling platform and is assembled and connected through high-strength bolts, the work efficiency can be greatly improved, the construction period is shortened, the cofferdam can be recycled, the problem that the wall body is deformed and damaged due to cutting and dismantling, materials cannot be recycled and wasted is solved, the vertical connection of the steel cofferdam adopts a prestress structure, the separation work of the part above the riverbed and the part below the riverbed can be operated above the water surface, the part above the riverbed can automatically float to the position above the water surface by using the buoyancy of water to be dismantled, the diving operation is not needed, and the dismantling and turnover speed is high.
Practical application researches find that the double-wall steel cofferdam used in the bridge deepwater foundation construction at present has the defects of inconvenient construction, more consumable materials and the like.
Disclosure of Invention
The utility model aims to provide a weir-die integrated double-wall steel cofferdam of a vertical hidden type enclosing purlin, which is convenient and fast in construction, consumes less steel, is suitable for construction operation of a foundation bearing platform of a deepwater bridge, can be arranged into different cross section forms and different heights according to different cross section forms of the bearing platform, provides a dry operation environment for construction of the underwater bearing platform, and ensures the construction quality of a lower-structure bearing platform of the bridge.
In order to realize the purpose of the utility model, the technical scheme is as follows:
a weir-die integrated double-wall steel cofferdam of vertical hidden type enclosing purlins is formed by stacking and welding a plurality of layers of steel cofferdams, each layer of steel cofferdam is formed by welding four right-angle plates and a plurality of plane plates in a splicing way, an inner cavity of each layer of steel cofferdam is provided with an inner support, each right-angle plate and each plane plate comprise an inner wall plate and an outer wall plate, the inner wall plate and the outer wall plates are respectively provided with a plurality of layers of horizontal ring plates, the horizontal ring plates on the inner wall plate correspond to the horizontal ring plates on the outer wall plates in height, the two horizontal ring plates with corresponding heights are connected through a plurality of uniformly distributed horizontal support rods, one side between the inner wall plate and the outer wall plate is sealed and welded with a partition plate, two ends of the inner side of the partition plate are respectively welded with a vertical enclosing purlin, the vertical enclosing purlin is arranged in the same plate to be full length and serves as a supporting enclosing purlin for the inner support of the steel cofferdam, and the two vertical enclosing purlins are also respectively welded and fixed with the corresponding inner wall plate and outer wall plate, a surrounding purlin support is fixedly connected between the two vertical surrounding purlins, one vertical surrounding purlin is respectively fixed on the inner sides of the two plate walls on the other side between the inner wall plate and the outer wall plate, and a surrounding purlin support is also fixedly connected between the two vertical surrounding purlins; the welding of two adjacent plates is that one side of one plate with the partition plate is welded with the other side without the partition plate. The two adjacent steel cofferdams are connected in a way that the top of the lower steel cofferdam layer and the bottom of the upper steel cofferdam layer are welded into a whole through a horizontal ring plate. The steel cofferdam can be integrally welded on the land on the bank before being transferred to a transfer position through floating transportation or hoisting, and can also be assembled stage by stage and transferred section by section at the transfer position; in the process of sinking and embedding the steel cofferdam, the aim of sinking in place is achieved by uniformly and symmetrically pouring sandwich wall concrete, sand bags and water injection in a cofferdam chamber, and sucking mud and dredging at an embedding position.
Further preferred is: and a cutting edge angle plate is connected between the bottom of the inner wall plate and the bottom of the outer wall plate.
Further preferred is: the bottom surface of the sealing edge angle plate is additionally provided with an edge angle stiffening plate to increase the rigidity of the bottom of the steel cofferdam and ensure that the bottom of the steel cofferdam is not too large in deformation in the process of cutting soil and sinking.
Further preferred is: vertical stiffening ribs are arranged on the two plate walls in the bin between the inner wall plate and the outer wall plate, the vertical stiffening ribs are L-shaped angle steels and are arranged along the height direction of the cofferdam, and the arrangement form and the wall plates form a notch shape.
Further preferred is: the inner side of the partition board is provided with a partition board stiffening rod.
Further preferred is: and two ends of the inner support are respectively fixedly connected with the inner wall plate at the joint of the two plate blocks through the inner wall stiffening plate.
Further preferred is: the horizontal supporting rods are connected and fixed on the upper part of the horizontal annular plate.
Further preferred is: the vertical purlin adopts the channel-section steel, the channel-section steel left-hand thread arranges inside the steel cofferdam bin, one side of channel-section steel welds on the wallboard, the opening face and the partition panel welding of channel-section steel.
Further preferred is: the horizontal supporting rods are all L-shaped angle steels, and the supporting position of the inner support requires that the extension lines of two horizontal supporting rods pass through the central point of the inner wall stiffening plate; the enclosing purlin supports all adopt L type angle steel, and the support department of inner support requires wherein two of them enclosing purlin supports the extension line all through the central point of inner wall stiffening plate.
Further preferred is: the axis of the inner support and the section centroid of the inner wall stiffening plate are on the same straight line, each inner wall stiffening plate is divided into four small blocks, and the small blocks are welded to ensure that the inner wall stiffening plate and the wall plate are welded firmly.
This weir mould integration double-walled steel cofferdam of vertical hidden purlin has does:
1. the hidden vertical purlin that encloses of accurate positioning installation can be assembled in the processing of double-walled steel cofferdam, and the bulkhead board, bulkhead board stiffener, vertical purlin that encloses and enclose the purlin and support to set up between the inner wall board and the outer wall board of double-walled steel cofferdam, form hidden purlin that encloses, transfer in the cofferdam and the step of cushion cap template installation of having removed this step of enclosing the purlin installation and demolising under the different operating mode that draws water of cushion cap construction from to reach the mesh that can accelerate the construction progress.
2. The stress form of the double-wall steel cofferdam is optimized, the water pressure and the soil pressure outside the cofferdam after water pumping can be resisted, meanwhile, the consumption of steel can be reduced, the engineering cost can be reduced, and certain economic benefits are achieved.
3. Under the condition of utilizing the inner wall of the cofferdam as a template of the bearing platform, the space collision between the traditional built-in enclosing purlin and the reinforcement of the bearing platform can be effectively avoided in the construction process of the bearing platform, the reinforcement of the bearing platform in the construction process is facilitated, and the site construction is more convenient.
Drawings
FIG. 1 is a schematic view of an installation structure of the weir-mold integrated double-wall steel cofferdam of the vertical hidden type purlin;
FIG. 2 is a schematic left side sectional view of FIG. 1;
FIG. 3 is a schematic view of the connection of the inner support to the inner wall panel;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic view of the connection between the inner support and the inner wall stiffener;
FIG. 6 is a schematic structural view of a rectangular plate;
FIG. 7 is a schematic view of a planar plate;
FIG. 8 is a schematic view of a three-dimensional structure of an installation relationship between a partition plate and a vertical purlin;
the names corresponding to the sequence numbers in the figure are:
1-1, inner wall plate; 1-2, outer wall plates; 11. a vertical stiffener; 2. a horizontal ring plate; 21. a horizontal support bar; 3. a sealing edge angle plate; 31. a blade angle stiffener; 4. a partition panel; 41. a cabin separation plate stiffening rod; 5. a vertical purlin; 51. supporting the enclosing purlin; 6. an inner wall stiffening plate; 7. an inner support; 8. a bearing platform; 9. pile columns; 10. and (5) sealing the bottom concrete.
Detailed Description
In order to make the technical solutions and advantages of the present application clearer, the following describes the technical solutions clearly and completely with reference to the embodiments.
Example 1
A weir-die integrated double-wall steel cofferdam of a vertical hidden type purlin is formed by stacking and welding a plurality of layers of steel cofferdams, each layer of steel cofferdam is formed by welding four right-angle plates and a plurality of plane plates in a splicing way, an inner cavity of each layer of steel cofferdam is provided with an inner support 7, each right-angle plate and each plane plate comprise an inner wall plate 1-1 and an outer wall plate 1-2, the inner wall plate 1-1 and the outer wall plate 1-2 are respectively provided with a plurality of layers of horizontal ring plates 2, the horizontal ring plates 2 on the inner wall plate 1-1 and the horizontal ring plates 2 on the outer wall plate 1-2 have corresponding heights, the horizontal ring plates 2 at two corresponding heights are connected through a plurality of uniformly distributed horizontal support rods 21, one side between the inner wall plate 1-1 and the outer wall plate 1-2 is sealed and welded with a bulkhead 4, two ends of the inner side of the bulkhead 4 are respectively welded with a vertical purlin 5, the vertical purlins 5 are arranged in the same plate to be through long and used as supporting purlins for inner support of the steel cofferdam, the two vertical purlins 5 are also welded and fixed with the corresponding inner wall plate 1-1 and the corresponding outer wall plate 1-2 respectively, a purlin supporting member 51 is fixedly connected between the two vertical purlins 5, one vertical purlin 5 is also fixed on the inner side of the two plate walls on the other side between the inner wall plate 1-1 and the outer wall plate 1-2 respectively, and a purlin supporting member 51 is also fixedly connected between the two vertical purlins 5; the welding of two adjacent plates is that one side of one plate with the partition plate 4 is welded with the other side without the partition plate 4. A cutting edge structure is arranged between the inner wall plate 1-1 and the outer wall plate 1-2 at the bottom of the bottommost steel cofferdam, the bottom of the inner wall plate 1-1 is higher than the bottom of the outer wall plate 1-2, and a sealing cutting edge angle plate 3 is connected between the bottom of the inner wall plate 1-1 and the bottom of the outer wall plate 1-2.
The edge angle stiffening plate 31 is additionally arranged on the bottom surface of the sealing edge angle plate 3 to increase the rigidity of the bottom of the steel cofferdam and ensure that the bottom of the steel cofferdam is not deformed too much in the process of cutting soil and sinking.
Example 2
A weir-die integrated double-wall steel cofferdam of a vertical hidden type enclosing purlin is formed by stacking and welding multiple layers of steel cofferdams, each layer of steel cofferdam is formed by welding four right-angle plates and multiple plane plates in a surrounding manner, an inner support 7 is arranged in an inner cavity of each layer of steel cofferdam, each right-angle plate and each plane plate respectively comprise an inner wall plate 1-1 and an outer wall plate 1-2, multiple layers of horizontal ring plates 2 are respectively arranged on the inner wall plate 1-1 and the outer wall plate 1-2, the horizontal ring plates 2 on the inner wall plate 1-1 correspond to the horizontal ring plates 2 on the outer wall plate 1-2 in height, the horizontal ring plates 2 at the two corresponding heights are connected through a plurality of uniformly distributed horizontal support rods 21, and the horizontal support rods 21 are connected and fixed on the upper portions of the horizontal ring plates 2. One side sealing welding between interior wallboard 1-1 and the exterior wallboard 1-2 has a partition panel 4, and the inboard both ends of partition panel 4 have been welded respectively and have been enclosed purlin 5 vertically, and vertical enclosing purlin 5 sets up to logical length in same plate, and the support that supports in the steel cofferdam encloses the purlin, and two vertical enclosing purlins 5 also respectively with corresponding interior wallboard 1-1 and exterior wallboard 1-2 welded fastening, fixedly connected with enclose purlin support 51 between two vertical enclosing purlins 5, the inboard of partition panel 4 be provided with partition panel stiffener 41. A vertical surrounding purlin 5 is also fixed on the inner sides of the two plate walls on the other side between the inner wall plate 1-1 and the outer wall plate 1-2, and a surrounding purlin support 51 is also fixedly connected between the two vertical surrounding purlins 5; the welding of two adjacent plates is that one side of one plate with the partition plate 4 is welded with the other side without the partition plate 4. The two adjacent steel cofferdams are connected in a way that the top of the lower steel cofferdam layer and the bottom of the upper steel cofferdam layer are welded into a whole through a horizontal ring plate.
A cutting edge structure is arranged between the inner wall plate 1-1 and the outer wall plate 1-2 at the bottom of the bottommost steel cofferdam, the bottom of the inner wall plate 1-1 is higher than the bottom of the outer wall plate 1-2, and a sealing cutting edge angle plate 3 is connected between the bottom of the inner wall plate 1-1 and the bottom of the outer wall plate 1-2. The edge angle stiffening plate 31 is additionally arranged on the bottom surface of the sealing edge angle plate 3 to increase the rigidity of the bottom of the steel cofferdam and ensure that the bottom of the steel cofferdam is not deformed too much in the process of cutting soil and sinking.
Two ends of the inner support 7 are respectively fixedly connected with the inner wall plates 1-1 at the joint of the two plate blocks through the inner wall stiffening plate 6.
The vertical purlin 5 adopts the channel-section steel, the channel-section steel left-hand thread arranges inside the steel cofferdam bin, one side of channel-section steel welds on the wallboard, the opening face and the partition 4 welding of channel-section steel.
The horizontal support rods 21 are all L-shaped angle steels, and the supporting position of the inner support 7 requires that the extension lines of two horizontal support rods 21 pass through the central point of the inner wall stiffening plate 6; the enclosing purlin supports 51 are all made of L-shaped angle steel, and the supporting positions of the inner supports 7 require that the extension lines of the two enclosing purlin supports 51 all pass through the center point of the inner wall stiffening plate 6.
The axial line of the inner support 7 and the section centroid of the inner wall stiffening plate 6 are on the same straight line, each inner wall stiffening plate 6 is divided into four small blocks, and the small blocks are welded to ensure that the inner wall stiffening plate 6 and the wall plate are welded firmly.
The double-wall steel cofferdam can be transported by floating or hoisted to a lowering position after the integral welding is finished on the land of the bank before the lowering, and also can be assembled stage by stage and lowered section by section at the lowering position; in the process of sinking and embedding the steel cofferdam, the aim of sinking in place is achieved by uniformly and symmetrically pouring sandwich wall concrete, sand bags and water injection in a cofferdam chamber, and sucking mud and dredging at an embedding position. The bottom of the double-wall steel cofferdam is fixed on a pile 9 through bottom sealing concrete 10, and a bearing platform 8 is arranged in the double-wall steel cofferdam at the top of the bottom sealing concrete 10. The double-wall steel cofferdam improves the integral rigidity of the cofferdam by arranging the double-wall bulkhead, and resists the water pressure and the soil pressure outside the cofferdam after pumping water by the inner support 7, the stiffening plate and the enclosing purlin support 51.
Compared with the traditional steel cofferdam (the horizontal enclosing purlin is arranged on the inner side of the cofferdam), the installation step of the enclosing purlin on the inner side of the cofferdam can be omitted in the lowering process of the steel cofferdam, and the construction period can be shortened by 13% (the traditional steel cofferdam is lowered for 60 days, and the cofferdam is lowered for 50 days); the steel consumption can be reduced by the design of the steel cofferdam, the steel consumption is saved by 8% (the size of the constructed bearing platform is 16.8m long, 10.8m wide and 4.5m high, in order to meet the construction requirement, the total height of the steel cofferdam is 17m, 415t is required by the traditional steel cofferdam design, and 380t is required by the steel cofferdam); compare in traditional steel cofferdam, owing to will enclose the purlin and hide inboard with the steel cofferdam, can effectual assurance cushion cap reinforcement's integrality in cushion cap work progress, the quality of cushion cap reinforcement construction more can guarantee.
The above description is not intended to limit the present application, and the present application is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions or substitutions within the spirit and scope of the present application.
Claims (10)
1. The utility model provides a weir mould integration double-walled steel cofferdam of vertical hidden purlin that encloses, it is piled up the welding by the multilayer steel cofferdam and forms its characterized in that: each layer of steel cofferdam is formed by welding four right-angle plates and a plurality of plane plates in a surrounding way, an inner support (7) is arranged in the inner cavity of each layer of steel cofferdam, each right-angle plate and each plane plate comprise an inner wall plate (1-1) and an outer wall plate (1-2), a plurality of layers of horizontal ring plates (2) are respectively arranged on the inner wall plate (1-1) and the outer wall plate (1-2), the horizontal ring plates (2) on the inner wall plate (1-1) and the horizontal ring plates (2) on the outer wall plate (1-2) have corresponding heights, the horizontal ring plates (2) at two corresponding heights are connected through a plurality of uniformly distributed horizontal support rods (21), a cabin partition plate (4) is welded at one side between the inner wall plate (1-1) and the outer wall plate (1-2), and a vertical surrounding purlin (5) is respectively welded at two ends of the inner side of the cabin partition plate (4), the two vertical enclosing purlins (5) are respectively welded and fixed with the corresponding inner wall plate (1-1) and the corresponding outer wall plate (1-2), an enclosing purlin support (51) is fixedly connected between the two vertical enclosing purlins (5), one vertical enclosing purlin (5) is respectively fixed on the inner sides of the two plate walls on the other side between the inner wall plate (1-1) and the outer wall plate (1-2), and an enclosing purlin support (51) is also fixedly connected between the two vertical enclosing purlins (5); the welding of two adjacent plates is that one side of one plate with the partition plate (4) is welded with the other side without the partition plate (4).
2. A weir-die integrated double-wall steel cofferdam for vertical hidden purlins according to claim 1, wherein: a cutting edge structure is arranged between the inner wall plate (1-1) and the outer wall plate (1-2) at the bottom of the bottommost steel cofferdam, the bottom of the inner wall plate (1-1) is higher than that of the outer wall plate (1-2), and a sealing cutting edge angle plate (3) is connected between the bottom of the inner wall plate (1-1) and the bottom of the outer wall plate (1-2).
3. The weir-die integrated double-wall steel cofferdam of vertical hidden purlin of claim 2, characterized in that: the bottom surface of the sealing edge angle plate (3) is additionally provided with an edge angle stiffening plate (31).
4. A weir-die integrated double-wall steel cofferdam for vertical hidden purlins according to claim 1, wherein: vertical stiffening ribs (11) are arranged on the two plate walls in the bin between the inner wall plate (1-1) and the outer wall plate (1-2).
5. The weir-die integrated double-wall steel cofferdam of the vertical hidden enclosing purlin of claim 1, wherein: the inner side of the compartment plate (4) is provided with a compartment plate stiffening rod (41).
6. A weir-die integrated double-wall steel cofferdam for vertical hidden purlins according to claim 1, wherein: two ends of the inner support (7) are respectively fixedly connected with the inner wall plates (1-1) at the joint of the two plate blocks through the inner wall stiffening plates (6).
7. A weir-die integrated double-wall steel cofferdam for vertical hidden purlins according to claim 1, wherein: the horizontal support rods (21) are connected and fixed on the upper part of the horizontal annular plate (2).
8. A weir-die integrated double-wall steel cofferdam for vertical hidden purlins according to claim 1, wherein: the vertical purlin (5) adopts channel steel, the channel steel is arranged inside the steel cofferdam chamber in a reverse buckling mode, one side of the channel steel is welded on the wall plate, and the opening face of the channel steel is welded with the compartment partition plate (4).
9. A weir-die integrated double-wall steel cofferdam for vertical hidden purlins according to claim 1, wherein: the horizontal supporting rods (21) are all L-shaped angle steels, and the supporting position of the inner support (7) requires that the extension lines of two horizontal supporting rods (21) pass through the central point of the inner wall stiffening plate (6); the enclosing purlin supports (51) are all L-shaped angle steels, and the supporting positions of the inner supports (7) require that the extension lines of the two enclosing purlin supports (51) pass through the center points of the inner wall stiffening plates (6).
10. A weir-die integrated double-wall steel cofferdam for vertical hidden purlins according to claim 1, wherein: the axial line of the inner support (7) and the section centroid of the inner wall stiffening plate (6) are on the same straight line, each inner wall stiffening plate (6) is divided into four small blocks, and the small blocks are welded.
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| CN202123403080.XU CN216787175U (en) | 2021-12-31 | 2021-12-31 | Weir mould integration double-walled steel cofferdam of vertical hidden purlin |
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| CN202123403080.XU CN216787175U (en) | 2021-12-31 | 2021-12-31 | Weir mould integration double-walled steel cofferdam of vertical hidden purlin |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232658A (en) * | 2021-12-31 | 2022-03-25 | 广西路建工程集团有限公司 | Weir mould integration double-wall steel cofferdam of vertical hidden purlin that encloses |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232658A (en) * | 2021-12-31 | 2022-03-25 | 广西路建工程集团有限公司 | Weir mould integration double-wall steel cofferdam of vertical hidden purlin that encloses |
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