CN212175823U - Combined dumbbell type double-walled steel cofferdam - Google Patents
Combined dumbbell type double-walled steel cofferdam Download PDFInfo
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- CN212175823U CN212175823U CN201922469727.5U CN201922469727U CN212175823U CN 212175823 U CN212175823 U CN 212175823U CN 201922469727 U CN201922469727 U CN 201922469727U CN 212175823 U CN212175823 U CN 212175823U
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Abstract
The utility model provides a combined dumbbell-shaped double-wall steel cofferdam, which comprises an outer wall plate, an inner wall plate, a bottom bulkhead, an inner support, bottom sealing concrete, a floating assisting system, a first platform, a second platform and a blade foot, wherein a plurality of block units are assembled to form a double-arc, and the middle part of the double-arc is welded to form a dumbbell-shaped structure in a folding unit connection mode; the steel plate truss floating-assistant system increases the depth of draught of the cofferdam, and the launching air bag is used for assisting in safe launching of the cofferdam. The utility model has the characteristics of simple installation, stable in structure intensity height, offal safety and anti impact strength can the reinforce etc, be applicable to the dumbbell type double-walled steel cofferdam construction in complicated rock stratum waters.
Description
Technical Field
The utility model relates to a bridge deep water basis cushion cap cofferdam construction technical field, concretely relates to combined type dumbbell type double-walled steel cofferdam.
Background
The bridge foundation is a part of a bridge lower structure in contact with a foundation, and the bridge foundation with the water depth of more than 5-6 m is generally called as a bridge deep water foundation in engineering. Bridge deepwater foundation construction generally needs to solve two problems: the construction of a bored pile platform and the construction of an underwater bearing platform and a pier (tower) body. The construction of the bearing platform and the pier (tower) body is carried out in a waterless environment, so that a temporary maintenance structure, namely a cofferdam, is firstly constructed to form a waterproof structure when the bearing platform and the pier (tower) body buried under water are constructed, so that the bearing platform and the pier (tower) body can be conveniently constructed. At present, bridge deepwater foundation construction cofferdams mainly comprise the following components: steel sheet pile cofferdam, hasp steel-pipe pile cofferdam, steel hanging box cofferdam, steel jacket box cofferdam and double-walled steel cofferdam etc..
The research on the double-wall steel cofferdam is mostly concentrated on the circular double-wall steel cofferdam, the construction technology of the double-wall steel cofferdam is mature day by day, however, the research on the dumbbell-type double-wall steel cofferdam is less, and particularly, some problems still exist in the manufacturing of the large dumbbell-type double-wall steel cofferdam. The large dumbbell-shaped double-wall steel cofferdam has the characteristics of more unit members, large volume, heavy weight, high structural stability requirement and the like, and the whole cofferdam manufacturing engineering task is difficult. Due to the limiting factors such as size and weight, the whole assembly is difficult to realize at present, and the transportation and the whole launching are not easy to realize.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the prior art, provide a combined type dumbbell type double-walled steel cofferdam that has characteristics such as simple installation, stable in structure intensity height, lower water safety and anti impact strength ability reinforce.
In order to achieve the above objects, the present technical solution provides a composite dumbbell-shaped double-walled steel cofferdam, which sinks to the designed elevation of the riverbed surface, comprising: the device comprises a blocking unit, a folding unit, a bottom bulkhead, an inner support, bottom sealing concrete, a floating-assistant system, a first platform, a second platform and a blade foot; the blocking units and the folding units are spliced to form a dumbbell-shaped structure, wherein a plurality of blocking units are spliced to form symmetrical double arcs, and the middles of the double arcs are spliced by the folding units; the partitioning unit is formed by welding an outer wall plate and an inner wall plate, the outer wall plate is welded on the outer side of the inner wall plate, the lower ends of the outer wall plate and the inner wall plate are welded to form a blade to form a double-wall cabin, the bottom bulkhead and the inner support are respectively welded on the lower portion and the upper portion of the folding unit, the floating-assistant system is welded on the inner side of the blade, and the first platform and the second platform are sequentially welded on the double-wall cabin from top to bottom.
In some embodiments, the partitioning unit comprises a wallboard vertical stiffening rib, a diaphragm plate, a horizontal ring plate and a diagonal brace, wherein the inner wall plate is arranged along the vertical direction, the wallboard vertical stiffening rib and the horizontal ring plate are welded on the outer side of the inner wall plate, the wallboard vertical stiffening rib and the horizontal ring plate are welded vertically, the vertical stiffening rib is welded on the side edge of the inner wall plate along the vertical direction, the diaphragm plate is installed on the outer side wall of the inner wall plate, the diagonal brace is arranged on the horizontal ring plate, and the outer wall plate is welded and connected with the inner wall plate.
In some embodiments, the folding unit is formed by welding an outer wall plate, an inner wall plate, a wall plate vertical stiffening rib, a horizontal ring plate and a diaphragm plate, wherein the wall plate vertical stiffening rib and the horizontal ring plate are welded on the outer side of the inner wall plate, the wall plate vertical stiffening rib and the horizontal ring plate are welded vertically, the vertical stiffening rib is welded on the side edge of the inner wall plate along the vertical direction, the diaphragm plate is installed on the upper outer side wall of the inner wall plate, the diaphragm plate vertical stiffening rib and the diaphragm plate horizontal stiffening rib are arranged on the diaphragm plate, and the outer wall plate is welded with the inner wall plate.
In some embodiments, horizontal ring plates and wall plate vertical stiffeners are welded inside the outer wall plate.
In some embodiments, the diaphragm is provided with diaphragm vertical stiffeners and diaphragm transverse stiffeners.
In some embodiments, the floating-aid system is formed by welding a floating-aid bracket bottom plate, a floating-aid bracket side plate, a floating-aid bracket diagonal brace and a floating-aid bracket cover plate, wherein the floating-aid bracket bottom plate is arranged at the designed elevation of the riverbed surface, the floating-aid bracket side plate is vertically arranged on the floating-aid bracket bottom plate, the floating-aid bracket diagonal brace is obliquely connected with the floating-aid bracket bottom plate and the floating-aid bracket side plate, and the floating-aid bracket cover plate covers the floating-aid bracket side plate and the floating-aid bracket diagonal brace.
In some embodiments, launching airbags are uniformly paved below the floating-assistant system.
In some embodiments, 10 block units are assembled in the horizontal direction to form a double circular arc, the middle of the double circular arc is welded by connecting 4 folding units to form a dumbbell-shaped structure, wherein 5 block units are arranged on two sides of each folding unit in a split mode.
In some embodiments, the first platform is formed by welding a first steel truss and an I-shaped steel rib plate, and the second platform is formed by welding a second steel truss and a triangular support.
In some embodiments, the top sides of the first and second platforms are provided with a distribution beam, a scaffold board and a dense mesh net in sequence.
Compared with the prior art, the technical scheme has the following beneficial effects:
(1) the utility model provides a preparation is assembled through adopting horizontal piecemeal mill to combined type dumbbell type double-walled steel cofferdam, adopts the mode spelling that the biarc was assembled, was foldd in the middle of, and the efficiency of construction is high, and structural strength is high.
(2) The utility model provides a partial component in combined type dumbbell type double-walled steel cofferdam can dismantle the recovery after the construction and recycle, not only has energy saving and emission reduction's benefit, has effectively reduced material cost moreover, realizes the effective utilization of resource, and economic benefits is showing.
(3) The utility model discloses an it increases draft, technique such as lower water gasbag is supplementary to help floating the bracket in cofferdam bottom installation, can realize the safe lower water of single section heavy weight steel cofferdam, has effectively reduced safe risk.
Drawings
Fig. 1 is a sectional view of a composite dumbbell-shaped double-walled steel cofferdam according to an embodiment of the present invention.
Fig. 2 is a structural plan view of a composite dumbbell-type double-walled steel cofferdam according to an embodiment of the present invention.
Fig. 3a-3e are cross-sectional views of composite dumbbell-type double-walled steel cofferdam at different positions according to an embodiment of the present invention.
Fig. 4 is a schematic view of the circular arc assembly of the composite dumbbell-shaped double-wall steel cofferdam according to an embodiment of the present invention.
Fig. 5a to 5b are schematic sectional views of a first platform and a second platform of a composite dumbbell-type double-walled steel cofferdam according to an embodiment of the present invention.
Fig. 5c is a first platform layout view of the composite dumbbell-type double-walled steel cofferdam according to an embodiment of the present invention.
Fig. 6a and 6b are schematic views of the launching of the composite dumbbell-shaped double-walled steel cofferdam according to an embodiment of the present invention.
In the figure: 1-an outer wall plate; 2-inner wall plate; 3-bottom bay; 4-double-walled cabins; 5, internal support; 6-sealing bottom concrete; 7-designing elevation of the river bed surface; 8-a floating-aid system; 801-floating-aid bracket bottom plate; 802-a floatation-assist bracket side panel; 803-floating support diagonal bracing; 804-floating aid bracket cover plate; 9-a first platform; 901-a first steel truss; 902-an i-steel rib plate; 10-a second platform; 1001-second steel truss; 1002-triangular support; 11-a cushion cap; 12-a blade leg; 13-a panel vertical stiffener; 14-diaphragm plate; 15-diaphragm vertical stiffeners; 16-diaphragm transverse stiffeners; 17-horizontal ring plate; 18-diagonal bracing; 19-a steel casing; 20-a distribution beam; 21-scaffold board; 22-hanging a dense mesh net; 23-launching airbag; 24-rear pull cable; 25-a waterslide; 26-a partitioning unit; 27-closing unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
As shown in fig. 1 to 4, the composite dumbbell-shaped double-wall steel cofferdam in this embodiment is formed by splicing units, and the steel material for the structure is mainly Q235B.
The composite dumbbell-type double-wall steel cofferdam sinks to a designed elevation (7) of a riverbed surface and comprises a partitioning unit (26), a folding unit (27), a bottom bulkhead (3), an inner support (5), bottom sealing concrete (6), a floating assisting system (8), a first platform (9), a second platform (10) and a blade foot (12); the blocking units (26) and the folding units (27) are spliced to form a dumbbell-shaped structure, wherein the blocking units (26) are spliced to form symmetrical double arcs, and the middles of the double arcs are spliced by the folding units (27);
the blocking unit (26) is formed by welding an outer wall plate (1) and an inner wall plate (2), the outer wall plate (1) is welded on the outer side of the inner wall plate (2), the lower ends of the outer wall plate (1) and the inner wall plate (2) are welded to form a blade foot (12) to form a double-wall cabin (4), a bottom bulkhead (3) and an inner support (5) are respectively welded on the lower portion and the upper portion of a folding unit (27), a floating assisting system (8) is welded on the inner side of the blade foot (12), and a first platform (9) and a second platform (10) are sequentially welded on the double-wall cabin (4) from top to bottom.
Block unit (26) include wallboard vertical stiffening rib (13), cross slab (14), horizontal crown plate (17) and bracing (18), wherein interior wallboard (2) set up along vertical direction, the outside welding wallboard vertical stiffening rib (13) and horizontal crown plate (17) of interior wallboard (2), wherein wallboard vertical stiffening rib (13) and horizontal crown plate (17) vertical welding, vertical stiffening rib (13) weld the side of interior wallboard (2) along vertical direction, cross slab (14) are installed on interior wallboard (2) last lateral wall, bracing (18) are settled on horizontal crown plate (17), outer wallboard (1) welded connection inner wall board (2), it is concrete, horizontal crown plate (17) and vertical stiffening rib (13) of wallboard are welded to outer wallboard (1) inboard.
The diaphragm plate (14) is also provided with a diaphragm plate vertical stiffening rib (15) and a diaphragm plate transverse stiffening rib (16), wherein the diaphragm plate vertical stiffening rib (15) and the diaphragm plate transverse stiffening rib (16) are vertically arranged.
The folding unit (27) is connected with a plurality of arc-shaped block units (26) to form a dumbbell-shaped structure. Fold unit (27) by exterior wall board (1), interior wallboard (2), the vertical stiffening rib (13) of wallboard, horizontal ring board (17) and cross slab (14) welding form, wherein the vertical stiffening rib (13) of wallboard and horizontal ring board (17) are welded to interior wallboard (2) outside, wherein vertical stiffening rib (13) of wallboard and horizontal ring board (17) vertical welding, vertical stiffening rib (13) welds the side at interior wallboard (2) along vertical direction, cross slab (14) are installed on outer wall on interior wallboard (2), wherein be provided with the horizontal stiffening rib (15) of cross slab and the horizontal stiffening rib (16) of cross slab on cross slab (14), exterior wall board (1) welded connection interior wallboard (2), and is specific, horizontal ring board (17) of outer wallboard (1) inboard welding and vertical stiffening rib (13).
The floating-assistant system (8) is formed by welding a floating-assistant bracket bottom plate (801), a floating-assistant bracket side plate (802), a floating-assistant bracket inclined strut (803) and a floating-assistant bracket cover plate (804), wherein the floating-assistant bracket bottom plate (801) is arranged at a designed elevation (7) of a river bed surface, the floating-assistant bracket side plate (802) is vertically arranged on the floating-assistant bracket bottom plate (801), the floating-assistant bracket inclined strut (803) is obliquely connected with the floating-assistant bracket bottom plate (801) and the floating-assistant bracket side plate (802), and the floating-assistant bracket cover plate (804) covers the floating-assistant bracket side plate (802) and the floating-assistant bracket inclined strut (803). The floating-assistant system is mainly a steel truss structure formed by steel plates, and the whole truss system is ensured to be well stressed through transverse and longitudinal connection.
Launching air bags (23) are uniformly distributed below the floating-assistant system (8).
Specifically, as shown in fig. 4, 10 block units (26) are assembled in the horizontal direction to form a double circular arc, the middle of the double circular arc is welded in a manner of connecting through 4 folding units (27) to form a dumbbell-shaped structure, wherein 5 block units (26) are respectively arranged on two sides of the folding units (27), the radian of 4 block units (26) is 48 degrees, and the radian of the other block unit is 40.5 degrees. When the height of the cofferdam is larger, the cofferdam can be integrally formed by welding in a layered height-connecting mode in the vertical direction.
The main construction process flow of the block unit (26) is as follows: manufacturing a jig frame platform → paving inner wall plates (2) → marking lines (positions of the vertical stiffeners of the wall plates, the transverse partition plates and the horizontal ring plates) → welding the vertical stiffeners of the wall plates (13) on the outer sides of the inner wall plates (2), and installing the horizontal ring plates (17) → installing the transverse partition plates (14) with the vertical stiffeners of the transverse partition plates (15) and the transverse partition plate horizontal stiffeners (16) → installing inclined struts (18) → welding the horizontal ring plates (17) on the inner sides of the outer wall plates (1), and paving the outer wall plates (1) with the vertical stiffeners of the wall plates (13) →.
The main construction process flow of the folding unit (27) is as follows: manufacturing a jig frame platform → paving inner wall plates (2) → marking lines (positions of vertical stiffeners of the wall plates, transverse partition plates and horizontal ring plates) → welding vertical stiffeners (13) of the wall plates on the outer sides of the inner wall plates (2), installing transverse partition plates (14) with vertical stiffeners (15) of the transverse partition plates and transverse partition plate horizontal stiffeners (16) → welding horizontal ring plates (17) on the inner sides of the outer wall plates (1), and paving outer wall plates (1) with vertical stiffeners (13) →.
As shown in fig. 4, 5 blocking units (26) marked as (phi) - (phi) and 2 folding units (27) marked as (phi) are welded in the horizontal direction to form a half-width structure, and the middle parts of the blocking units and the folding units are connected through the folding units (27) to form a dumbbell-shaped structure.
Two inner supports (5) are symmetrically welded at the upper part of the folding unit (27), two bottom compartments (3) are symmetrically welded at the bottom, and a floating-assistant bracket bottom plate (801), a floating-assistant bracket side plate (802), a floating-assistant bracket inclined support (803) and a floating-assistant bracket cover plate (804) are sequentially welded along the lower end of the blade foot (12) to form a floating-assistant system (8).
As shown in fig. 5a to 5c, the first steel truss (901) and the i-shaped steel rib plate (902) are welded to form the first platform (9) for drilling, that is, the first platform (9) is formed by welding the first steel truss (901) and the i-shaped steel rib plate (902), the second steel truss (1001) and the triangular support (1002) are welded to form the second platform (10) for inserting and beating the steel casing (19), and the second platform (10) is formed by welding the second steel truss (1001) and the triangular support (1002). The top sides of the first platform (9) and the second platform (10) are sequentially provided with a distribution beam (20), a scaffold board (21) and a dense mesh hanging net (22) for protection. Finally forming a complete composite dumbbell-shaped double-wall steel cofferdam, and detecting through a watertight test, wherein the watertight test comprises the watertight test of the double-wall cabin and the bottom plate of the floating-assisting bracket.
As shown in figure 6, the sections of the hardened cofferdam at the lower river are cleaned to form a waterslide (25) meeting the gradient requirement. And measuring the water depth of the river under the cofferdam, and dredging until the water depth of the cofferdam is met. The cofferdam is fixedly connected through a rear pull cable (24), the launching air bags (23) are uniformly laid at the bottom and in front of the cofferdam, the rear pull cable (24) is slowly and uniformly released, the cofferdam slides along a launching slideway (25) at a uniform speed in the rolling launching air bag (23) by a method of self-weight component force gliding of the cofferdam, the rear pull cable (24) is cut off when the cofferdam is at a certain distance from a water edge, and the cofferdam is accelerated to be flushed into water and rapidly reaches a deep water area. After launching, the cofferdam is sequentially subjected to the stages of floating transportation, positioning, lifting and lowering, mud sucking, bottom sealing and the like, and after the strength of bottom sealing concrete meets the requirement, a bearing platform (11) is formed by pouring in the cofferdam.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (10)
1. A combined dumbbell type double-walled steel cofferdam, sunken to riverbed surface design elevation (7), its characterized in that includes: the device comprises a blocking unit (26), a folding unit (27), a bottom bulkhead (3), an inner support (5), bottom sealing concrete (6), a floating-assistant system (8), a first platform (9), a second platform (10) and a blade foot (12); the blocking units (26) and the folding units (27) are spliced to form a dumbbell-shaped structure, wherein the blocking units (26) are spliced to form symmetrical double arcs, and the middles of the double arcs are spliced by the folding units (27);
the blocking unit (26) is formed by welding an outer wall plate (1) and an inner wall plate (2), the outer wall plate (1) is welded on the outer side of the inner wall plate (2), the lower ends of the outer wall plate (1) and the inner wall plate (2) are welded to form a blade foot (12) to form a double-wall cabin (4), a bottom bulkhead (3) and an inner support (5) are respectively welded on the lower portion and the upper portion of a folding unit (27), a floating assisting system (8) is welded on the inner side of the blade foot (12), and a first platform (9) and a second platform (10) are sequentially welded on the double-wall cabin (4) from top to bottom.
2. The combined dumbbell-type double-wall steel cofferdam of claim 1, wherein the partitioning unit (26) comprises wall plate vertical stiffeners (13), a cross-sectional plate (14), horizontal ring plates (17) and diagonal braces (18), wherein the inner wall plate (2) is arranged along the vertical direction, the wall plate vertical stiffeners (13) and the horizontal ring plates (17) are welded on the outer side of the inner wall plate (2), the wall plate vertical stiffeners (13) and the horizontal ring plates (17) are vertically welded, the vertical stiffeners (13) are welded on the side edges of the inner wall plate (2) along the vertical direction, the cross-sectional plate (14) is installed on the upper and outer side walls of the inner wall plate (2), the diagonal braces (18) are installed on the horizontal ring plates (17), and the outer wall plate (1) is welded to the inner wall plate (2).
3. The combined dumbbell-type double-wall steel cofferdam of claim 1, wherein the folding unit (27) is formed by welding an outer wall plate (1), an inner wall plate (2), wall plate vertical stiffeners (13), a horizontal ring plate (17) and a diaphragm plate (14), wherein the wall plate vertical stiffeners (13) and the horizontal ring plate (17) are welded outside the inner wall plate (2), the wall plate vertical stiffeners (13) and the horizontal ring plate (17) are welded vertically, the vertical stiffeners (13) are welded on the side of the inner wall plate (2) along the vertical direction, the diaphragm plate (14) is installed on the upper and outer side walls of the inner wall plate (2), the diaphragm plate vertical stiffeners (15) and the diaphragm plate horizontal stiffeners (16) are arranged on the diaphragm plate (14), and the outer wall plate (1) is welded to the inner wall plate (2).
4. A composite dumbbell double-walled steel cofferdam according to any of claims 2 or 3 characterized in that horizontal ring plate (17) and vertical stiffeners (13) of the wall plate are welded inside the outer wall plate (1).
5. The composite dumbbell-type double-walled steel cofferdam of any of claims 2 or 3, characterized in that the diaphragm (14) is provided with diaphragm vertical stiffeners (15) and diaphragm transverse stiffeners (16).
6. The composite dumbbell-shaped double-wall steel cofferdam of claim 1, wherein the floating-aid system (8) is formed by welding a floating-aid bracket bottom plate (801), a floating-aid bracket side plate (802), a floating-aid bracket diagonal brace (803) and a floating-aid bracket cover plate (804), wherein the floating-aid bracket bottom plate (801) is placed at the designed elevation (7) of the riverbed surface, the floating-aid bracket side plate (802) is vertically placed on the floating-aid bracket bottom plate (801), the floating-aid bracket diagonal brace (803) is obliquely connected with the floating-aid bracket bottom plate (801) and the floating-aid bracket side plate (802), and the floating-aid bracket cover plate (804) is covered on the floating-aid bracket side plate (802) and the floating-aid bracket diagonal brace (803).
7. The combined dumbbell-shaped double-wall steel cofferdam of claim 1, wherein the launching air bags (23) are uniformly laid under the floating-assistant system (8).
8. The combined dumbbell-type double-wall steel cofferdam of claim 1, wherein 10 block units (26) are assembled in the horizontal direction to form a double circular arc, the middle of the double circular arc is welded by 4 folding units (27) to form a dumbbell-type structure, and 5 block units (26) are arranged on both sides of the folding units (27).
9. The composite dumbbell-shaped double-wall steel cofferdam of claim 1, characterized in that the first platform (9) is formed by welding the first steel truss (901) and the I-steel rib plate (902), and the second platform (10) is formed by welding the second steel truss (1001) and the triangular support (1002).
10. The combined dumbbell-shaped double-wall steel cofferdam of claim 9, wherein the top sides of the first (9) and second (10) platforms are provided with the distribution beam (20), the scaffold board (21) and the dense mesh hanging net (22) in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922469727.5U CN212175823U (en) | 2019-12-31 | 2019-12-31 | Combined dumbbell type double-walled steel cofferdam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922469727.5U CN212175823U (en) | 2019-12-31 | 2019-12-31 | Combined dumbbell type double-walled steel cofferdam |
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| CN212175823U true CN212175823U (en) | 2020-12-18 |
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| CN201922469727.5U Active CN212175823U (en) | 2019-12-31 | 2019-12-31 | Combined dumbbell type double-walled steel cofferdam |
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Denomination of utility model: Composite dumbbell type double wall steel cofferdam Effective date of registration: 20230927 Granted publication date: 20201218 Pledgee: Industrial Bank Limited by Share Ltd. Wuhan branch Pledgor: HUBEI PROVINCIAL ROAD & BRIDGE Co.,Ltd. Registration number: Y2023980059401 |