CN111764418A - Steel cofferdam positioning system in deep water - Google Patents
Steel cofferdam positioning system in deep water Download PDFInfo
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- CN111764418A CN111764418A CN202010733895.5A CN202010733895A CN111764418A CN 111764418 A CN111764418 A CN 111764418A CN 202010733895 A CN202010733895 A CN 202010733895A CN 111764418 A CN111764418 A CN 111764418A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 191
- 239000010959 steel Substances 0.000 title claims abstract description 191
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 15
- 238000004873 anchoring Methods 0.000 description 13
- 239000011435 rock Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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Abstract
The application discloses steel cofferdam positioning system in deep water. The system comprises: the first positioning module is connected to the front side of the steel cofferdam and fixed at a position close to the upstream of the deep water; the second positioning module is connected to the rear side of the steel cofferdam and fixed at a position close to the downstream of the deep water; the guide module is connected to the left side or the right side of the steel cofferdam and fixed at the position close to the two banks of deep water; and the steel cofferdam is positioned through the matching of the first positioning module, the second positioning module and the guide module. The method and the device solve the technical problem that the bottomless steel cofferdam cannot be positioned in deep water.
Description
Technical Field
The application relates to the field of bridge engineering, in particular to a steel cofferdam positioning system in deep water.
Background
In recent years, with the continuous development of economic construction in China, more and more bridges span large rivers, the cofferdam technology applied to bridge foundation construction is greatly developed and improved, and the double-wall steel cofferdam is widely applied as a water-enclosing structure of bridge deepwater foundation construction.
The key construction technologies of the double-wall steel cofferdam such as adjustment, positioning, bottom sealing and the like have great difference under different hydrological and geological conditions. When the foundation is in deep water, the problems of exposed bedrock, large rock surface fluctuation, deep water level and high flow rate exist, and only the bottomless steel cofferdam can be put down first, the bottom sealing concrete is used for anchoring the bottom of the steel pile casing, and then a drilling platform is built for foundation pile construction.
However, due to the influence of water flow, wind direction and tidal water and the large inclination angle of the rock face, the construction of the bottom sealing concrete of the high-low edge steel cofferdam can generate large lateral pressure, so that the whole cofferdam is easy to slide; therefore, the positioning from the lower position of the bottomless steel cofferdam to the position before the construction of the foundation pile is still a difficult problem.
Aiming at the problem that the bottomless steel cofferdam in the related technology can not be positioned in deep water, an effective solution is not provided at present.
Disclosure of Invention
The main purpose of this application is to provide a steel cofferdam positioning system in deep water to solve the problem that no bottom steel cofferdam can not fix a position in deep water.
To achieve the above object, according to one aspect of the present application, there is provided a steel cofferdam positioning system in deep water.
The steel cofferdam positioning system in deep water according to the present application comprises: the first positioning module is connected to the front side of the steel cofferdam and fixed at a position close to the upstream of the deep water; the second positioning module is connected to the rear side of the steel cofferdam and fixed at a position close to the downstream of the deep water; the guide module is connected to the left side or the right side of the steel cofferdam and fixed at the position close to the two banks of deep water; and the steel cofferdam is positioned through the matching of the first positioning module, the second positioning module and the guide module.
Further, the steel cofferdam is a bottomless steel pouring jacket placed on a deep-water riverbed.
Further, the first positioning module comprises: four first anchors fixed at positions near the upstream of the deep water, and a first anchor chain connected to the first anchors; and one end of the first steel wire rope is connected with the first anchor chain, and the other end of the first steel wire rope is connected with the front side of the steel cofferdam.
Further, the first positioning module comprises: four first anchors fixed at positions near the upstream of the deep water, and a first anchor chain connected to the first anchors; one end of the first steel wire rope is connected with the first anchor chain; and one side of the first sub-positioning module is connected with the other end of the first steel wire rope, and the other side of the first sub-positioning module is connected with the front side of the steel cofferdam.
Further, the second positioning module comprises: two second anchors fixed at positions near the downstream of the deep water, and a second anchor chain connected with the second anchors; and one end of the first steel wire rope is connected with the first anchor chain, and the other end of the first steel wire rope is connected with the rear side of the steel cofferdam.
Further, the second positioning module comprises: two second anchors fixed at positions near the downstream of the deep water, and a second anchor chain connected with the second anchors; one end of the second steel wire rope is connected with the second anchor chain; and one side of the second sub-positioning module is connected with the other end of the second steel wire rope, and the other side of the second sub-positioning module is connected with the rear side of the steel cofferdam.
Further, the guide module includes: four third anchors, two of which are arranged at positions close to the left bank and the other two of which are arranged at positions close to the right bank; a third anchor chain connected to the third anchor; and one end of the third steel wire rope is connected with the third anchor chain, and the other end of the third steel wire rope is connected with the left side or the right side of the steel cofferdam.
Further, the guide module includes: four third anchors, two of which are arranged at positions close to the left bank and the other two of which are arranged at positions close to the right bank; a third anchor chain connected to the third anchor; one end of the third steel wire rope is connected with the third anchor chain; and the guide ship is connected with the other end of the third steel wire rope and is connected with the left side or the right side of the steel cofferdam.
Further, the first sub-positioning module comprises: four fourth anchors, two of which are arranged at the position close to the left bank and the other two of which are arranged at the position close to the right bank; a fourth anchor chain connected to the fourth anchor; one end of the fourth steel wire rope is connected with the fourth anchor chain; and the first positioning ship is connected with the other end of the fourth steel wire rope and is connected with the front side of the steel cofferdam through a first stay cable.
Further, the second sub-positioning module comprises: two fifth anchors are arranged at the position close to the left bank, and the other two fifth anchors are arranged at the position close to the right bank; a fifth anchor chain connected to the fifth anchor; one end of the fifth steel wire rope is connected with the fifth anchor chain; and the second positioning ship is connected with the other end of the fifth steel wire rope and is connected with the rear side of the steel cofferdam through a second stay cable.
In the embodiment of the application, an anchoring positioning mode is adopted, and the first positioning module is connected to the front side of the steel cofferdam and fixed at the position close to the upstream of deep water; the second positioning module is connected to the rear side of the steel cofferdam and fixed at a position close to the downstream of the deep water; the guide module is connected to the left side or the right side of the steel cofferdam and fixed at the position close to the two banks of deep water; the steel cofferdam is positioned through the matching of the first positioning module, the second positioning module and the guide module; the purpose of eliminating the adverse effect of each factor to enable the steel cofferdam not to slide easily is achieved, the technical effect that the bottomless steel cofferdam can be effectively positioned in deep water with no coverage on rock surfaces, large inclination angle, water urgency and wind severity is achieved, and the technical problem that the bottomless steel cofferdam cannot be positioned in the deep water is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a top view of a steel cofferdam positioning system according to an embodiment of the present application;
FIG. 2 is an elevation view of a steel cofferdam positioning system according to an embodiment of the present application;
FIG. 3 is a top view of a first positioning vessel according to an embodiment of the present application;
FIG. 4 is a top view of a second positioning vessel according to an embodiment of the present application.
Reference numerals
10. A first positioning module; 20. a second positioning module; 30. a guide module; 40. steel cofferdams; 101. a first anchor; 102. a first anchor chain; 103. a first wire rope; 104. a first sub-positioning module; 201. a second anchor; 202. a second anchor chain; 203. a second wire rope; 204. a second sub-positioning module; 301. a third anchor; 302. a third anchor chain; 303. a third wire rope; 304. a guide boat; 1041. a fourth anchor; 1042. a fourth anchor chain; 1043. a fourth wire rope; 1044. a first positioning vessel; 2041. a fifth anchor; 2042. a fifth anchor chain; 2043. a fifth wire rope; 2044. a second positioning vessel.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-4, the present application relates to a system for positioning a steel cofferdam 40 in deep water, the system comprising: the first positioning module 10 is connected to the front side of the steel cofferdam 40 and fixed at the position close to the upstream of the deep water; a second positioning module 20 connected to the rear side of the steel cofferdam 40 and fixed at a position close to the downstream of the deep water; a guide module 30 connected to the left or right side of the steel cofferdam 40 and fixed at a position close to both banks of deep water; the steel cofferdam 40 is positioned by the cooperation of the first positioning module 10, the second positioning module 20 and the guide module 30.
The deep water has the conditions of deep water level, high flow velocity, high water surface wind speed, no cover on the rock surface at the water bottom and large inclination angle of the rock surface at the water bottom; when steel cofferdam 40 set up the deep water, can lead to necessarily producing easily and sliding, that is to say, steel cofferdam 40 will unable location in predetermined position department, causes the pier can not set up the deep water in the bridge engineering construction, can only adopt expensive suspension bridge.
In order to reduce the cost, the problem that the bridge pier cannot be arranged in the deep water needs to be solved, namely, the steel cofferdam 40 which is necessary for arranging the bridge pier needs to be positioned at a preset position in the deep water, and at the moment, the factors that the steel cofferdam 40 slides due to the fact that the water level in the deep water is deep, the flow speed is high, the water surface wind speed is high, the underwater rock surface is not covered, and the underwater rock surface inclination angle is large need to be considered.
In this embodiment, the first positioning module 10 is used in a state of being attached to the front side of the steel cofferdam 40 and fixed at a position near the upstream of the deep water. The first positioning module 10 has a water flow resistance and an air resistance in a water flow direction, and is a main structure for ensuring the safety and stability of the steel cofferdam 40.
In this embodiment, preferably, the first positioning module 10 includes: four first anchors 101 fixed at positions near upstream of the deep water, and a first anchor chain 102 connected to the first anchors 101; and a first wire rope 103 having one end connected to the first anchor chain 102 and the other end connected to the front side of the steel cofferdam 40.
The first anchor 101 is a 150t frog type concrete anchor, and the anchoring position is about 600m away from the steel cofferdam 40; fixing a first anchor 101 by using a first anchor chain 102, and connecting the front side of the steel cofferdam 40 and the first anchor chain 102 by using a first steel wire rope 103; thus, the steel cofferdam 40 can be prevented from being driven to slide in the water flow direction by the force generated by water flow and wind and the sideslip force generated by a large inclination angle.
Since the deep water arranged at a position close to the upstream is inevitably required to bear the force generated by the water flow flowing from the upstream to the downstream, a plurality of first anchors 101, preferably four first anchors 101, are required to be arranged, and the steel cofferdam 40 is effectively prevented from sliding towards the water flow direction after the plurality of forces are combined.
In this embodiment, a second positioning module 20 is further employed, which is connected to the rear side of the steel cofferdam 40 and fixed at a position near the deep water downstream. The second positioning module 20 mainly has the function of resisting the influence of tide and water; a certain counter-pulling force is provided for the steel cofferdam 40 to ensure the stability of the positioning system of the present invention in the water flow direction.
In this embodiment, preferably, the second positioning module 20 includes: two second anchors 201 fixed at positions near the downstream of the deep water, and a second anchor chain 202 connected to the second anchors 201; and a first wire rope 103 having one end connected to the first anchor chain 102 and the other end connected to the rear side of the steel cofferdam 40.
The second anchor 201 is a 150t frog type concrete anchor, and the anchoring position is about 600m away from the steel cofferdam 40; fixing a second anchor 201 by using a second anchor chain 202, and connecting the front side of the steel cofferdam 40 and the second anchor chain 202 by using a second steel wire rope 203; thus, the steel cofferdam 40 can be prevented from being slipped against the water flow by the force of the tidal water, the force of the wind, and the slip force generated by the large inclination angle.
Because the steel cofferdam is arranged at the deep water position close to the downstream, the force generated by the water flow flowing from the upstream to the downstream does not need to be borne, and therefore, the force generated by the tide and the wind and the side slip force can be effectively avoided by arranging only two second anchors 201, and the steel cofferdam 40 slides in the direction opposite to the water flow.
The positioning in the horizontal direction is realized by the cooperation of the first positioning module 10 and the second positioning module 20.
In this embodiment, the guide module 30 is connected to the left or right side of the steel cofferdam 40 and fixed to the deep water near both banks. The guide module 30 has the function of adjusting and controlling the position of the steel cofferdam 40 in the vertical water flow direction, bearing the lateral water flow resistance and the wind force.
In this embodiment, preferably, the guiding module 30 includes: four third anchors 301, two third anchors 301 disposed near the left bank, and two other third anchors 301 disposed near the right bank; a third anchor chain 302 connected to the third anchor 301; and one end of a third steel wire rope 303 is connected with the third anchor chain 302, and the other end of the third steel wire rope is connected with the left side or the right side of the steel cofferdam 40.
The third anchor 301 close to the left bank is a 40t concrete anchor which is directly cast in an open cut foundation pit mode; the third anchor 301 close to the right bank is a 75t frog type concrete anchor which is about 200m away from the center of the steel cofferdam 40; a third anchor 301 is fixed by a third anchor chain 302, and the front side of the steel cofferdam 40 is connected with the second anchor chain 202 by a third steel wire rope 303; therefore, the steel cofferdam 40 can be prevented from sliding in the vertical direction due to lateral water flow resistance, wind power and lateral sliding force generated by a large inclination angle.
Because the steel cofferdam is arranged at the deep water position close to both banks, the steel cofferdam can effectively avoid lateral water flow resistance, wind power and lateral sliding force by arranging only two third anchors 301 on one side without bearing the force generated by the water flow flowing from the upstream to the downstream, so that the steel cofferdam 40 slides in the vertical direction.
Through the cooperation of the first positioning module 10, the second positioning module 20 and the guiding module 30, the positioning in the horizontal and vertical directions, that is, the omnibearing positioning of the steel cofferdam 40 is realized.
Therefore, the positioning system of the invention can bring the following beneficial effects: the application range is wide, the steel cofferdam can be used in deep water foundation construction environments with large inclination angles and bare rock surfaces, such as cross rivers, Yangtze rivers, lakes and the like, the influences of deep water flow, wind direction, tidal water, large inclination angle rock surfaces and uncovered rock surfaces are thoroughly eliminated, the steel cofferdam 40 can be accurately positioned, and then piers can be arranged in deep water, so that expensive suspension bridges can be replaced by more economic structural types; the comprehensive cost of construction is greatly reduced; and blasting operation is not needed, the main channel passing is not influenced, the safety and the environmental protection are realized, and the construction speed is high.
In this embodiment, the steel cofferdam 40 is preferably a bottomless steel jacket box placed on the bed of the deep water. The steel boxed material all adopts Q235a grade steel, and comprises inner surrounding wall, outer surrounding wall, cutting edge foot, horizontal circumferential stiffening plate, vertical steel box, inner and outer surrounding wall stiffening rib, lifting lug, inner support, anchor pile and accessory structure.
The pouring jacket is provided with 5 in-layer supports, wherein the upper 4 in-layer supports adopt a steel pipe truss structure, and vertical connecting steel pipes are arranged. The inner support of the last layer is in a space truss form.
The steel jacket box is provided with 14 steel boxes, each steel box consists of a steel box wall plate, a vertical stiffening plate and a circumferential stiffening plate, the steel boxes are used as compartments of the steel jacket box and are divided into 14 independent cabin bodies, and the functions of pouring pressure cabin concrete, injecting water and leveling and the like are achieved. The anchor piles are arranged at the positions of the steel boxes, so that the effects of enhancing the overall anti-sliding and anti-floating performance of the steel sleeve box are achieved.
The anchor is directly connected with the steel cofferdam 40, so that the positioning of the steel cofferdam 40 can be realized, and the technical effects are achieved; however, in actual operation, the anchoring and the anchor receiving are very inconvenient, the construction efficiency is extremely low, artificial anchoring to a specified position is required, and artificial anchor receiving and pulling are also required. In view of the above, in the present embodiment, an engineering iron barge is introduced for determining and adjusting the position of the steel cofferdam 40 and adjusting the stress of the anchor.
In this embodiment, preferably, the first positioning module 10 includes: four first anchors 101 fixed at positions near upstream of the deep water, and a first anchor chain 102 connected to the first anchors 101; a first wire rope 103 having one end connected to the first anchor chain 102; and one side of the first sub-positioning module 104 is connected with the other end of the first steel wire rope 103, and the other side is connected with the front side of the steel cofferdam 40. The first sub-positioning module 104 comprises: four fourth anchors 1041, two of the fourth anchors 1041 being disposed at positions close to the left bank, and the other two of the fourth anchors 1041 being disposed at positions close to the right bank; a fourth anchor chain 1042 connected to the fourth anchor 1041; one end of a fourth steel wire rope 1043 is connected with the fourth anchor chain 1042; and a first positioning boat 1044 connected to the other end of the fourth wire rope 1043 and connected to the front side of the steel cofferdam 40 through a first stay cable.
In this embodiment, preferably, the second positioning module 20 includes: two second anchors 201 fixed at positions near the downstream of the deep water, and a second anchor chain 202 connected to the second anchors 201; a second wire rope 203, one end of which is connected to the second anchor chain 202; and one side of the second sub-positioning module 204 is connected with the other end of the second steel wire rope 203, and the other side of the second sub-positioning module is connected with the rear side of the steel cofferdam 40. The second sub-positioning module 204 comprises: four fifth anchors 2041, two fifth anchors 2041 disposed adjacent the left bank, and two additional fifth anchors 2041 disposed adjacent the right bank; a fifth anchor line 2042 connected to the fifth anchor 2041; one end of a fifth steel wire rope 2043 is connected to the fifth anchor chain 2042; and a second positioning vessel 2044 connected to the other end of the fifth wire rope 2043, and connected to the rear side of the steel cofferdam 40 through a second stay cable.
In this embodiment, preferably, the guiding module 30 includes: four third anchors 301, two third anchors 301 disposed near the left bank, and two other third anchors 301 disposed near the right bank; a third anchor chain 302 connected to the third anchor 301; one end of a third steel wire rope 303 is connected with the third anchor chain 302; and a guide ship 304 connected to the other end of the third wire rope 303 and connected to the left or right side of the steel cofferdam 40.
800t (400t) of engineering barge positioning ships are arranged at the upstream side and the downstream side. The first positioning boat 1044 is arranged at the position, which is about 200m away from the bridge axis, of the upstream of the steel cofferdam 40, the second positioning boat 2044 is arranged at the position, which is about 200m away from the bridge axis, of the downstream of the steel cofferdam 40, and the positioning boats play roles in determining and adjusting the position of the steel cofferdam 40 and adjusting the stress of the main anchor. 800t barge positioning vessel parameters: load 800t, heavy load draft 2m, external dimension: 40m × 12m × 3 m. 400t barge positioning vessel parameters: load 400t, dead weight 132t, dead weight draft 1.5m, overall dimension: 40 m.times.9.2 m.times.2.4 m.
A winch and an anchor collecting system are arranged above the first positioning ship 1044, and 4 winches 5t, 1 winch 6t, 4 sets of 4-door pulley sets, 6 sets of 3-door pulley sets and 4 sets of 2-door pulley sets are arranged together, and the detailed arrangement is shown in fig. 3. The winch and anchor recovery system above the second positioning vessel 2044 is similar in arrangement to the forward positioning vessel, and is shown in detail in fig. 4.
Establish first guy cable between first location ship 1044 and steel cofferdam 40, every all sets up upper and lower two-layer guy cable, establish the second guy cable between second location ship 2044 and the steel cofferdam 40, every all sets up upper and lower two-layer guy cable, its effect is that the external force that receives steel cofferdam 40 passes to first anchor 101, second anchor 201 and third anchor 301, play and resist the flowing water influence, guarantee positioning system is at the ascending stability of rivers side, the effect of fixed steel cofferdam 40 position and the straightness that hangs down of regulation steel cofferdam 40.
Four fourth anchors 1041 of the first positioning vessel 1044 are arranged on both sides thereof, two near the left bank and two near the right bank; four fifth anchors 2041 of the second positioning vessel 2044 are disposed on both sides thereof, two near the left bank and two near the right bank; the main function is to adjust and control the position of the positioning ship in the direction perpendicular to the water flow, and bear the lateral water flow resistance and wind power, and the fourth anchor 2041 and the fifth anchor 2041 are all 5t Hall anchors.
Four third anchors 301 of the guide ship 304 are arranged on both sides thereof, two near the left bank and two near the right bank; the third anchor 301 close to the left bank is a 40t concrete anchor which is directly cast in an open cut foundation pit mode; the third anchor 301 close to the right bank is a 75t frog type concrete anchor which is about 200m away from the center of the steel cofferdam 40; a third anchor 301 is fixed by a third anchor chain 302, and the front side of the steel cofferdam 40 is connected with the second anchor chain 202 by a third steel wire rope 303; therefore, the steel cofferdam 40 can be prevented from sliding in the vertical direction due to lateral water flow resistance, wind power and lateral sliding force generated by a large inclination angle.
Therefore, actions such as anchoring, anchoring and the like are realized through the first positioning ship 1044, the second positioning ship 2044 and the guide ship 304, anchoring and anchoring processes are simplified, and construction efficiency is greatly improved; and the fourth anchor 1041 and the fifth anchor 2041 are adopted to realize the positioning of the first positioning vessel 1044 and the second positioning vessel 2044 in the vertical direction, and the third anchor 301 is adopted to realize the positioning of the guide vessel 304 and the steel cofferdam 40 in the vertical direction.
In this embodiment, it is preferable that the guide boat 304 is fixed to the steel cofferdam 40 by a guide frame, so that the vertical direction of the guide boat 304 is ensured to be positioned and the vertical direction of the steel cofferdam 40 is also ensured.
In this embodiment, facilities such as a bridle, a fixed seat, a winch, a tackle pulley, a duty house, and the like are preferably arranged on the deck of the vessel (the guide vessel 304, the first positioning vessel 1044, and the second positioning vessel 2044). An anchor rope dynamometer is installed between the tackle pulley group and the fixed seat to monitor the stress condition of the anchor rope, and the stress adjustment of the anchor rope is completed by tightening and loosening the tackle pulley group through a winch to ensure that the bearing force of each anchor rope is uniform.
In this embodiment, preferably, the anchoring construction is performed by using a 260t floating crane, and after the floating crane is positioned and anchored, the anchor chain is towed along the designed anchor rope direction, so as to ensure the anchoring angle.
From the above description, it can be seen that the following technical effects are achieved by the present application:
in the embodiment of the application, the anchoring positioning mode is adopted, and the first positioning module 10 is connected to the front side of the steel cofferdam 40 and fixed at the position close to the upstream of the deepwater; a second positioning module 20 connected to the rear side of the steel cofferdam 40 and fixed at a position close to the downstream of the deep water; a guide module 30 connected to the left or right side of the steel cofferdam 40 and fixed at a position close to both banks of deep water; positioning said steel cofferdam 40 by the cooperation of said first positioning module 10, said second positioning module 20 and said guiding module 30; the purpose of eliminating the adverse effect of each factor to enable the steel cofferdam 40 not to easily slide is achieved, the technical effect that the bottomless steel cofferdam 40 can be effectively positioned in deep water with uncovered rock surface, large inclination angle, and large water urgency and wind strength is achieved, and the technical problem that the bottomless steel cofferdam 40 cannot be positioned in the deep water is solved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A steel cofferdam positioning system in deep water, comprising: the first positioning module is connected to the front side of the steel cofferdam and fixed at a position close to the upstream of the deep water; the second positioning module is connected to the rear side of the steel cofferdam and fixed at a position close to the downstream of the deep water; the guide module is connected to the left side or the right side of the steel cofferdam and fixed at the position close to the two banks of deep water; and the steel cofferdam is positioned through the matching of the first positioning module, the second positioning module and the guide module.
2. The deep water steel cofferdam positioning system of claim 1, wherein the steel cofferdam is a bottomless steel jacket box placed on the bed of the deep water.
3. The steel cofferdam positioning system in deep water of claim 1, wherein said first positioning module comprises: four first anchors fixed at positions near the upstream of the deep water, and a first anchor chain connected to the first anchors; and one end of the first steel wire rope is connected with the first anchor chain, and the other end of the first steel wire rope is connected with the front side of the steel cofferdam.
4. The steel cofferdam positioning system in deep water of claim 1, wherein said first positioning module comprises: four first anchors fixed at positions near the upstream of the deep water, and a first anchor chain connected to the first anchors; one end of the first steel wire rope is connected with the first anchor chain; and one side of the first sub-positioning module is connected with the other end of the first steel wire rope, and the other side of the first sub-positioning module is connected with the front side of the steel cofferdam.
5. The steel cofferdam positioning system in deep water of claim 1, wherein said second positioning module comprises: two second anchors fixed at positions near the downstream of the deep water, and a second anchor chain connected with the second anchors; and one end of the first steel wire rope is connected with the first anchor chain, and the other end of the first steel wire rope is connected with the rear side of the steel cofferdam.
6. The steel cofferdam positioning system in deep water of claim 1, wherein said second positioning module comprises: two second anchors fixed at positions near the downstream of the deep water, and a second anchor chain connected with the second anchors; one end of the second steel wire rope is connected with the second anchor chain; and one side of the second sub-positioning module is connected with the other end of the second steel wire rope, and the other side of the second sub-positioning module is connected with the rear side of the steel cofferdam.
7. The deep water steel cofferdam positioning system of claim 1, wherein said guiding module comprises: four third anchors, two of which are arranged at positions close to the left bank and the other two of which are arranged at positions close to the right bank; a third anchor chain connected to the third anchor; and one end of the third steel wire rope is connected with the third anchor chain, and the other end of the third steel wire rope is connected with the left side or the right side of the steel cofferdam.
8. The deep water steel cofferdam positioning system of claim 1, wherein said guiding module comprises: four third anchors, two of which are arranged at positions close to the left bank and the other two of which are arranged at positions close to the right bank; a third anchor chain connected to the third anchor; one end of the third steel wire rope is connected with the third anchor chain; and the guide ship is connected with the other end of the third steel wire rope and is connected with the left side or the right side of the steel cofferdam.
9. The steel cofferdam positioning system in deep water of claim 4, wherein said first sub-positioning module comprises: four fourth anchors, two of which are arranged at the position close to the left bank and the other two of which are arranged at the position close to the right bank; a fourth anchor chain connected to the fourth anchor; one end of the fourth steel wire rope is connected with the fourth anchor chain; and the first positioning ship is connected with the other end of the fourth steel wire rope and is connected with the front side of the steel cofferdam through a first stay cable.
10. The steel cofferdam positioning system in deep water of claim 6, wherein said second sub-positioning module comprises: two fifth anchors are arranged at the position close to the left bank, and the other two fifth anchors are arranged at the position close to the right bank; a fifth anchor chain connected to the fifth anchor; one end of the fifth steel wire rope is connected with the fifth anchor chain; and the second positioning ship is connected with the other end of the fifth steel wire rope and is connected with the rear side of the steel cofferdam through a second stay cable.
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| CN202010733895.5A CN111764418A (en) | 2020-07-27 | 2020-07-27 | Steel cofferdam positioning system in deep water |
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| CN202010733895.5A CN111764418A (en) | 2020-07-27 | 2020-07-27 | Steel cofferdam positioning system in deep water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112211210A (en) * | 2020-10-19 | 2021-01-12 | 湖州三通水利建设有限公司 | Underwater fixing method of sandbag cofferdam |
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