Steel cofferdam positioning system in deep water

Abstract

The present application discloses a steel cofferdam positioning system in deep water. The system comprises: a first positioning module, connected to the front side of the steel cofferdam and fixed at a position close to the upstream of the deep water; a second positioning module, connected to the rear side of the steel cofferdam and fixed at a position close to the downstream of the deep water; a guide module, connected to the left or right side of the steel cofferdam and fixed at a position close to both sides of the deep water; the steel cofferdam is positioned by the cooperation of the first positioning module, the second positioning module and the guide module. The present application solves the technical problem that a bottomless steel cofferdam cannot be positioned in deep water.

Description

Technical Field

[0001] The present application relates to the field of bridge engineering, and in particular to a steel cofferdam positioning system in deep water. Background Art

[0002] In recent years, with the continuous development of my country's economic construction, more and more bridges have been built across rivers. The cofferdam technology used in bridge foundation construction has also been greatly developed and improved. Double-wall steel cofferdam has been widely used as a water conservancy structure for deep-water bridge foundation construction.

[0003] The key construction technologies of double-walled steel cofferdam, such as adjustment, positioning, and bottom sealing, vary greatly under different hydrological and geological conditions. When the foundation is located in deep water, there are problems such as exposed bedrock, large rock surface fluctuations, deep water level, and high flow rate. The only option is to lower the bottomless steel cofferdam first, use the bottom sealing concrete to anchor the steel casing footing, and then set up a drilling platform for pile construction.

[0004] However, due to the influence of water flow, wind direction, tide, and the large inclination of the rock surface, the bottom concrete construction of the high and low blade steel cofferdams will generate greater lateral pressure, making the cofferdam as a whole more prone to slippage; therefore, the positioning of the bottomless steel cofferdam after it is lowered and before the foundation pile construction remains a problem.

[0005] With regard to the problem in related technologies that bottomless steel cofferdams cannot be positioned in deep water, no effective solution has been proposed so far. Summary of the invention

[0006] The main purpose of the present application is to provide a steel cofferdam positioning system in deep water to solve the problem that a bottomless steel cofferdam cannot be positioned in deep water.

[0007] In order to achieve the above objective, according to one aspect of the present application, a steel cofferdam positioning system in deep water is provided.

[0008] The steel cofferdam positioning system in deep water according to the present application includes: a first positioning module, connected to the front side of the steel cofferdam and fixed at a position close to the upstream of the deep water; a second positioning module, connected to the rear side of the steel cofferdam and fixed at a position close to the downstream of the deep water; a guide module, connected to the left or right side of the steel cofferdam and fixed at a position close to both sides of the deep water; the steel cofferdam is positioned by the cooperation of the first positioning module, the second positioning module and the guide module.

[0009] Furthermore, the steel cofferdam is a bottomless steel casing placed on a riverbed in deep water.

[0010] Furthermore, the first positioning module includes: four first anchors fixed at a position upstream close to deep water, a first anchor chain connected to the first anchor; a first steel wire rope, one end of which is connected to the first anchor chain and the other end is connected to the front side of the steel cofferdam.

[0011] Furthermore, the first positioning module includes: four first anchors fixed at a position upstream close to deep water, a first anchor chain connected to the first anchor; a first steel wire rope, one end of which is connected to the first anchor chain; a first sub-positioning module, one side of which is connected to the other end of the first steel wire rope, and the other side is connected to the front side of the steel cofferdam.

[0012] Furthermore, the second positioning module includes: two second anchors fixed at a downstream position close to deep water, a second anchor chain connected to the second anchor; a first steel wire rope, one end of which is connected to the first anchor chain and the other end is connected to the rear side of the steel cofferdam.

[0013] Furthermore, the second positioning module includes: two second anchors fixed at a position downstream near the deep water, a second anchor chain connected to the second anchor; a second steel wire rope, one end of which is connected to the second anchor chain; a second sub-positioning module, one side of which is connected to the other end of the second steel wire rope, and the other side is connected to the rear side of the steel cofferdam.

[0014] Furthermore, the guide module includes: four third anchors, two third anchors are arranged near the left bank, and the other two third anchors are arranged near the right bank; a third anchor chain, connected to the third anchors; a third steel wire rope, one end of which is connected to the third anchor chain, and the other end is connected to the left or right side of the steel cofferdam.

[0015] Furthermore, the guide module includes: four third anchors, two third anchors are arranged near the left bank, and the other two third anchors are arranged near the right bank; a third anchor chain, connected to the third anchor; a third steel wire rope, one end of which is connected to the third anchor chain; a guide ship, connected to the other end of the third steel wire rope and connected to the left or right side of the steel cofferdam.

[0016] Furthermore, the first sub-positioning module includes: four fourth anchors, two fourth anchors are arranged near the left bank, and the other two fourth anchors are arranged near the right bank; a fourth anchor chain, connected to the fourth anchor; a fourth steel wire rope, one end of which is connected to the fourth anchor chain; a first positioning ship, connected to the other end of the fourth steel wire rope, and connected to the front side of the steel cofferdam through a first cable.

[0017] Furthermore, the second sub-positioning module includes: four fifth anchors, two of which are arranged near the left bank, and the other two are arranged near the right bank; a fifth anchor chain, connected to the fifth anchor; a fifth steel wire rope, one end of which is connected to the fifth anchor chain; a second positioning ship, connected to the other end of the fifth steel wire rope, and connected to the rear side of the steel cofferdam through a second cable.

[0018] In the embodiment of the present application, an anchoring positioning method is adopted, through a first positioning module, which is connected to the front side of the steel cofferdam and fixed at a position upstream close to the deep water; a second positioning module is connected to the rear side of the steel cofferdam and fixed at a position downstream close to the deep water; a guide module is connected to the left or right side of the steel cofferdam and fixed at a position on both sides close to the deep water; the steel cofferdam is positioned through the cooperation of the first positioning module, the second positioning module and the guide module; the purpose of eliminating the adverse effects of various factors so that the steel cofferdam is not easy to slip is achieved, thereby achieving the technical effect that the bottomless steel cofferdam can be effectively positioned in deep water with uncovered rock surface, large inclination, fast water and strong wind, thereby solving the technical problem that the bottomless steel cofferdam cannot be positioned in deep water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0020] Figure 1 is a top view of a steel cofferdam positioning system according to an embodiment of the present application;

[0021] Figure 2 is a front view of a steel cofferdam positioning system according to an embodiment of the present application;

[0022] Figure 3 is a top view of a first positioning vessel according to an embodiment of the present application;

[0023] Figure 4 is a top view of the second positioning vessel according to an embodiment of the present application.

[0024] Reference numerals

[0025] 10. first positioning module; 20. second positioning module; 30. guiding module; 40. steel cofferdam; 101. first anchor; 102. first anchor chain; 103. first steel wire rope; 104. first sub-positioning module; 201. second anchor; 202. second anchor chain; 203. second steel wire rope; 204. second sub-positioning module; 301. third anchor; 302. third anchor chain; 303. third steel wire rope; 304. guiding ship; 1041. fourth anchor; 1042. fourth anchor chain; 1043. fourth steel wire rope; 1044. first positioning ship; 2041. fifth anchor; 2042. fifth anchor chain; 2043. fifth steel wire rope; 2044. second positioning ship. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] like Figure 1-4 As shown, the present application relates to a system for positioning a steel cofferdam 40 in deep water, the system comprising: a first positioning module 10, connected to the front side of the steel cofferdam 40, and fixed at a 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 sides of the 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.

[0033] Deep water has the conditions of deep water level, high flow rate, high wind speed on the water surface, uncovered bottom rock surface and large inclination of bottom rock surface; when the steel cofferdam 40 is set in deep water, it will inevitably lead to easy slippage, that is, the steel cofferdam 40 will not be able to be positioned at the preset position, resulting in the inability to set the bridge piers in deep water during bridge construction, and only expensive suspension bridges can be used.

[0034] In order to reduce costs, it is necessary to solve the problem that bridge piers cannot be set in deep water. That is, the steel cofferdam 40 required for setting up the bridge piers needs to be positioned at a preset position in deep water. At this time, it is necessary to consider factors such as the deep water level, high flow rate, high wind speed on the water surface, uncovered bottom rock surface, and large inclination of the bottom rock surface in deep water that may cause the steel cofferdam 40 to slip.

[0035] In this embodiment, the first positioning module 10 is connected to the front side of the steel cofferdam 40 and fixed at a position upstream near the deep water. The first positioning module 10 has the function of withstanding the flow resistance and wind resistance in the direction of the water flow, and is the main structure to ensure the safety and stability of the steel cofferdam 40.

[0036] In this embodiment, preferably, the first positioning module 10 includes: four first anchors 101, fixed at a position upstream close to deep water, a first anchor chain 102, connected to the first anchor 101; a first steel wire rope 103, one end of which is connected to the first anchor chain 102, and the other end is connected to the front side of the steel cofferdam 40.

[0037] The first anchor 101 is a 150t frog-type concrete anchor, and the anchoring position is about 600m away from the steel cofferdam 40; the first anchor chain 102 is used to fix the first anchor 101, and the first steel wire rope 103 is used to connect the front side of the steel cofferdam 40 and the first anchor chain 102; in this way, it is possible to prevent the steel cofferdam 40 from sliding in the direction of the water flow due to the force generated by the water flow and wind, and the side sliding force generated by the large inclination angle.

[0038] Because it is arranged in deep water close to upstream, it must bear the force generated by the water flow from upstream to downstream. Therefore, more first anchors 101 need to be arranged, preferably four first anchors 101, to effectively prevent the steel cofferdam 40 from sliding in the direction of the water flow after multiple forces are combined.

[0039] In this embodiment, a second positioning module 20 is also used, which is connected to the rear side of the steel cofferdam 40 and fixed at a position close to the downstream of the deep water. The second positioning module 20 mainly has the function of resisting the influence of tides; it provides a certain anti-pulling force to the steel cofferdam 40 to ensure the stability of the positioning system of the present invention in the direction of water flow.

[0040] In this embodiment, preferably, the second positioning module 20 includes: two second anchors 201 fixed at a position downstream close to the deep water, a second anchor chain 202 connected to the second anchor 201; a first steel wire rope 103, one end of which is connected to the first anchor chain 102, and the other end is connected to the rear side of the steel cofferdam 40.

[0041] The second anchor 201 is a 150t frog-type concrete anchor, and the anchoring position is about 600m away from the steel cofferdam 40; the second anchor 201 is fixed by a second anchor chain 202, and the front side of the steel cofferdam 40 and the second anchor chain 202 are connected by a second steel wire rope 203; in this way, it is possible to prevent the steel cofferdam 40 from sliding in the direction against the current due to the force of the tide, the force generated by the wind, and the side sliding force generated by the large inclination angle.

[0042] Because it is arranged in deep water near the downstream, it does not need to bear the force generated by the water flow from upstream to downstream. Therefore, only two second anchors 201 need to be arranged to effectively avoid the force and side sliding force generated by tides and wind, so that the steel cofferdam 40 slides in the direction against the water flow.

[0043] Through the cooperation of the first positioning module 10 and the second positioning module 20, horizontal positioning is achieved.

[0044] In this embodiment, a guide module 30 is also used, which is connected to the left or right side of the steel cofferdam 40 and fixed at a position close to both banks of the deep water. The guide module 30 has the function of adjusting and controlling the position of the steel cofferdam 40 in the vertical direction of the water flow, and bears the lateral water flow resistance and wind force.

[0045] In this embodiment, preferably, the guide module 30 includes: four third anchors 301, two third anchors 301 are arranged near the left bank, and the other two third anchors 301 are arranged near the right bank; a third anchor chain 302, connected to the third anchor 301; a third steel wire rope 303, one end of which is connected to the third anchor chain 302, and the other end is connected to the left or right side of the steel cofferdam 40.

[0046] The third anchor 301 near the left bank is a 40t concrete anchor, which is directly cast in an open excavation pit. The third anchor 301 near the right bank is a 75t frog-type concrete anchor, which is about 200m away from the center of the steel cofferdam 40. The third anchor 301 is fixed by a third anchor chain 302, and the front side of the steel cofferdam 40 and the second anchor chain 202 are connected by a third steel wire rope 303. In this way, the steel cofferdam 40 can be prevented from sliding in the vertical direction due to lateral water flow resistance, wind force, and sideslip force caused by a large inclination angle.

[0047] Because it is arranged in deep water close to both banks, it does not need to bear the force generated by the water flow from upstream to downstream. Therefore, only two third anchors 301 are needed on each side to effectively avoid lateral water flow resistance, wind force and side sliding force, so that the steel cofferdam 40 can slide in the vertical direction.

[0048] Through the cooperation of the first positioning module 10 , the second positioning module 20 and the guide module 30 , horizontal and vertical positioning are achieved, that is, all-round positioning of the steel cofferdam 40 is achieved.

[0049] Therefore, the positioning system of the present invention can bring the following beneficial effects: it has a wide range of applications and can be used in deep-water foundation construction environments with large inclinations and bare rock surfaces across rivers, the Yangtze River, lakes, etc., completely eliminating the influence of deep-water flow, wind direction, tide, large-angle rock surfaces, and uncovered rock surfaces, and can accurately position the steel cofferdam 40, and then bridge piers can be set in deep water. As a result, expensive suspension bridges can be replaced by more economical structural types; the overall cost of construction is greatly reduced; and there is no need for blasting operations, no impact on the passage of the main channel, safety, environmental protection, and fast construction speed.

[0050] In this embodiment, preferably, the steel cofferdam 40 is a bottomless steel casing placed on the riverbed of deep water. The steel casing material is Q235a grade steel, and is composed of inner wall, outer wall, blade foot, horizontal annular stiffening plate, vertical steel box, inner and outer wall stiffening ribs, lifting lugs, inner support, anchor piles and auxiliary structures.

[0051] The box has 5 layers of internal supports, of which the top 4 layers adopt steel tube truss structure and vertical connecting steel tubes. The last layer of internal supports adopts the form of a composed space truss.

[0052] The steel box has 14 steel boxes, which are composed of steel box wall panels, vertical stiffeners and annular stiffeners. The steel boxes are used as compartments of the steel box, which are divided into 14 independent compartments, and play the role of pouring ballast concrete, water injection and leveling. Anchor piles are set according to the position of the steel box to enhance the overall anti-slip and anti-floating of the steel box.

[0053] The use of anchors directly connected to the steel cofferdam 40 can realize the positioning of the steel cofferdam 40 and achieve the above technical effects; however, in actual operation, anchoring and anchoring are very inconvenient, and the construction efficiency is extremely low. It is necessary to manually anchor to the specified position and also to manually retract the anchor. In view of this, in this embodiment, an engineering iron barge is introduced to determine and adjust the position of the steel cofferdam 40 and adjust the anchor force.

[0054] In this embodiment, preferably, the first positioning module 10 includes: four first anchors 101, fixed at a position close to the upstream of deep water, a first anchor chain 102, connected to the first anchor 101; a first steel wire rope 103, one end of which is connected to the first anchor chain 102; a first sub-positioning module 104, one side of which is connected to the other end of the first steel wire rope 103, and the other side is connected to the front side of the steel cofferdam 40. The first sub-positioning module 104 includes: four fourth anchors 1041, two fourth anchors 1041 are set at a position close to the left bank, and the other two fourth anchors 1041 are set at a position close to the right bank; a fourth anchor chain 1042, connected to the fourth anchor 1041; a fourth steel wire rope 1043, one end of which is connected to the fourth anchor chain 1042; a first positioning ship 1044, connected to the other end of the fourth steel wire rope 1043, and connected to the front side of the steel cofferdam 40 through a first cable.

[0055] In this embodiment, preferably, the second positioning module 20 includes: two second anchors 201, fixed at a position close to the downstream of the deep water, a second anchor chain 202, connected to the second anchor 201; a second steel wire rope 203, one end of which is connected to the second anchor chain 202; a second sub-positioning module 204, one side of which is connected to the other end of the second steel wire rope 203, and the other side is connected to the rear side of the steel cofferdam 40. The second sub-positioning module 204 includes: four fifth anchors 2041, two fifth anchors 2041 are set at a position close to the left bank, and the other two fifth anchors 2041 are set at a position close to the right bank; a fifth anchor chain 2042, connected to the fifth anchor 2041; a fifth steel wire rope 2043, one end of which is connected to the fifth anchor chain 2042; a second positioning ship 2044, connected to the other end of the fifth steel wire rope 2043, and connected to the rear side of the steel cofferdam 40 through a second cable.

[0056] In this embodiment, preferably, the guide module 30 includes: four third anchors 301, two third anchors 301 are arranged near the left bank, and the other two third anchors 301 are arranged near the right bank; a third anchor chain 302, connected to the third anchor 301; a third steel wire rope 303, one end of which is connected to the third anchor chain 302; a guide ship 304, connected to the other end of the third steel wire rope 303, and connected to the left or right side of the steel cofferdam 40.

[0057] 800t (400t) engineering iron barge positioning ships are arranged on the upstream and downstream sides. The first positioning ship 1044 is located about 200m upstream of the steel cofferdam 40 from the bridge axis, and the second positioning ship 2044 is located about 200m downstream of the steel cofferdam 40 from the bridge axis. The positioning ships play the role of determining and adjusting the position of the steel cofferdam 40 and adjusting the force of the main anchor. Parameters of the 800t iron barge positioning ship: load 800t, heavy load draft 2m, external dimensions: 40m×12m×3m. Parameters of the 400t iron barge positioning ship: load 400t, dead weight 132t, heavy load draft 1.5m, external dimensions: 40m×9.2m×2.4m.

[0058] The winch and anchor collection system are arranged above the first positioning ship 1044, with a total of 4 5t winches, 1 6t winch, 4 sets of 4-door pulley blocks, 6 sets of 3-door pulley blocks and 4 sets of 2-door pulley blocks. The detailed arrangement is as follows: Figure 3 The layout of the winch and anchor collection system on the second positioning ship 2044 is similar to that of the first positioning ship. The detailed layout is as follows: Figure 4 .

[0059] A first cable is arranged between the first positioning ship 1044 and the steel cofferdam 40, and upper and lower layers of cables are arranged on each surface. A second cable is arranged between the second positioning ship 2044 and the steel cofferdam 40, and upper and lower layers of cables are arranged on each surface. Its function is to transmit the external force exerted on the steel cofferdam 40 to the first anchor 101, the second anchor 201 and the third anchor 301, so as to resist the influence of flowing water, ensure the stability of the positioning system in the direction of water flow, fix the position of the steel cofferdam 40 and adjust the verticality of the steel cofferdam 40.

[0060] The four fourth anchors 1041 of the first positioning ship 1044 are arranged on both sides thereof, two close to the left bank and two close to the right bank; the four fifth anchors 2041 of the second positioning ship 2044 are arranged on both sides thereof, two close to the left bank and two close to the right bank; their main function is to adjust and control the position of the positioning ship in the direction perpendicular to the water flow, and to withstand lateral water flow resistance and wind force. The fourth and fifth anchors 2041 both adopt 5t Hall anchors.

[0061] The four third anchors 301 of the guide ship 304 are arranged on both sides thereof, two close to the left bank and two close to the right bank; the third anchor 301 close to the left bank is a 40t concrete anchor, which is directly cast in an open excavation pit; 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; and the third anchor chain 302 is used to fix the third anchor 301, and the third steel wire rope 303 is used to connect the front side of the steel cofferdam 40 and the second anchor chain 202; in this way, it is possible to prevent the steel cofferdam 40 from sliding in the vertical direction due to lateral water flow resistance, wind force, and sideslip force caused by a large inclination angle.

[0062] In this way, the first positioning ship 1044, the second positioning ship 2044, and the guide ship 304 are used to realize actions such as anchoring and anchoring, which simplifies the anchoring and anchoring processes and greatly improves the efficiency of construction; and the fourth anchor 1041 and the fifth anchor 2041 are used to realize the vertical positioning of the first positioning ship 1044 and the second positioning ship 2044, and the third anchor 301 is used to realize the vertical positioning of the guide ship 304 and the steel cofferdam 40.

[0063] In this embodiment, preferably, the guide boat 304 is fixed to the steel cofferdam 40 via a guide frame, so that the vertical direction of the guide boat 304 is positioned while also positioning the vertical direction of the steel cofferdam 40 .

[0064] In this embodiment, preferably, the deck of the ship (guide ship 304, first positioning ship 1044, second positioning ship 2044) is arranged with facilities such as a horse mouth, a fixed seat, a winch, a pulley group, and a duty room. An anchor rope dynamometer is installed between the pulley group and the fixed seat to monitor the stress of the anchor rope. The anchor rope stress adjustment is completed by tightening and loosening the pulley group with the winch to ensure that each anchor rope bears the force evenly.

[0065] In this embodiment, preferably, the anchoring construction is carried out using a 260t floating crane. After the floating crane is positioned to anchor, the anchor chain is dragged along the direction of the designed anchor rope to ensure the angle of anchoring.

[0066] From the above description, it can be seen that the present application achieves the following technical effects:

[0067] In the embodiment of the present application, an anchoring positioning method is adopted, through the first positioning module 10, which is connected to the front side of the steel cofferdam 40 and fixed at a position upstream close to the deep water; the second positioning module 20 is connected to the rear side of the steel cofferdam 40 and fixed at a position downstream close to the deep water; the guide module 30 is connected to the left or right side of the steel cofferdam 40 and fixed at a position close to both sides of the 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 purpose of eliminating the adverse effects of various factors so that the steel cofferdam 40 is not easy to slip is achieved, thereby achieving the technical effect that the bottomless steel cofferdam 40 can be effectively positioned in deep water with uncovered rock surface, large inclination, fast water and strong wind, thereby solving the technical problem that the bottomless steel cofferdam 40 cannot be positioned in deep water.

[0068] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel cofferdam positioning system in deep water, characterized in that: include: A 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; A second positioning module is connected to the rear side of the steel cofferdam and fixed at a downstream position close to the deep water; A guide module is connected to the left or right side of the steel cofferdam and fixed at a position close to both banks of the deep water; the steel cofferdam is positioned by the cooperation of the first positioning module, the second positioning module and the guide module; The steel cofferdam is a bottomless steel box placed on a riverbed in deep water. The bottomless steel box has a total of 5 layers of internal supports, of which the top 4 layers of internal supports adopt a steel pipe truss structure and are provided with vertical connecting steel pipes. The last layer of internal supports adopts a composed space truss form.

2. The steel cofferdam positioning system in deep water according to claim 1, characterized in that: The first positioning module includes: four first anchors fixed at a position upstream close to deep water, a first anchor chain connected to the first anchor; a first steel wire rope, one end of which is connected to the first anchor chain and the other end is connected to the front side of the steel cofferdam.

3. The steel cofferdam positioning system in deep water according to claim 1, characterized in that: The first positioning module includes: four first anchors fixed at a position upstream close to deep water, a first anchor chain connected to the first anchor; a first steel wire rope, one end of which is connected to the first anchor chain; a first sub-positioning module, one side of which is connected to the other end of the first steel wire rope, and the other side of which is connected to the front side of the steel cofferdam.

4. The steel cofferdam positioning system in deep water according to claim 1, characterized in that: The second positioning module includes: two second anchors fixed at a downstream position close to deep water, a second anchor chain connected to the second anchor; a second steel wire rope, one end of which is connected to the second anchor chain and the other end is connected to the rear side of the steel cofferdam.

5. The steel cofferdam positioning system in deep water according to claim 1, characterized in that: The second positioning module includes: two second anchors fixed at a position downstream near the deep water, a second anchor chain connected to the second anchor; a second steel wire rope, one end of which is connected to the second anchor chain; a second sub-positioning module, one side of which is connected to the other end of the second steel wire rope, and the other side is connected to the rear side of the steel cofferdam.

6. The steel cofferdam positioning system in deep water according to claim 1, characterized in that: The guide module includes: four third anchors, two of which are arranged near the left bank, and the other two are arranged near the right bank; a third anchor chain connected to the third anchors; a third steel wire rope, one end of which is connected to the third anchor chain, and the other end is connected to the left or right side of the steel cofferdam.

7. The deep water steel cofferdam positioning system according to claim 1, characterized in that: The guide module includes: four third anchors, two of which are arranged near the left bank, and the other two are arranged near the right bank; a third anchor chain connected to the third anchor; a third steel wire rope, one end of which is connected to the third anchor chain; and a guide ship connected to the other end of the third steel wire rope and to the left or right side of the steel cofferdam.

8. The steel cofferdam positioning system in deep water according to claim 3, characterized in that: The first sub-positioning module includes: four fourth anchors, two of which are arranged near the left bank, and the other two are arranged near the right bank; a fourth anchor chain, connected to the fourth anchor; a fourth steel wire rope, one end of which is connected to the fourth anchor chain; a first positioning ship, connected to the other end of the fourth steel wire rope, and connected to the front side of the steel cofferdam through a first cable.

9. The steel cofferdam positioning system in deep water according to claim 5, characterized in that: The second sub-positioning module includes: four fifth anchors, two of which are arranged near the left bank, and the other two are arranged near the right bank; a fifth anchor chain, connected to the fifth anchor; a fifth steel wire rope, one end of which is connected to the fifth anchor chain; a second positioning ship, connected to the other end of the fifth steel wire rope, and connected to the rear side of the steel cofferdam through a second cable.

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