A positioning system and method for setting a caisson foundation on a bare rock in deep water

Abstract

The application discloses a positioning system and method for setting a sinking well foundation on bare rock in deep water and relates to the technical field of offshore bridge construction. The positioning system comprises a plurality of gravity anchors, a plurality of cable assembly corresponding to the gravity anchors one by one and a plurality of winding devices corresponding to the cable assembly one by one. The plurality of gravity anchors are arranged on the bare rock seabed around the sinking well foundation at intervals. The first end of one cable assembly is connected with the corresponding gravity anchor. The plurality of winding devices are arranged on the sinking well foundation, and one winding device is connected with the second end of the corresponding cable assembly. Each winding device is used for winding and unwinding the corresponding cable assembly to position the sinking well foundation at the designed position. The application does not need to construct anchor piers, effectively solves the problem of difficult anchor pier construction in the bare rock environment, the horizontal resistance of the gravity anchor does not change with the depth of seawater, and the problem of insufficient horizontal stiffness of the anchor pier positioning system in the deep water environment is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore bridge construction, and in particular to a positioning system and method for setting a sinking well foundation on deep water bare rock. BACKGROUND

[0002] Bridge construction is gradually developing from inland rivers to marine environments, which often have characteristics such as strong winds, high waves, deep water, rapid currents, thin overburden, and bare rock. The traditional bored pile foundation has the disadvantages of small horizontal stiffness, poor resistance to horizontal force, long water construction period, many auxiliary facilities, and high risk, and has been unable to meet the requirements of bridge foundations in marine deep water environments. In contrast, the sinking well foundation has large horizontal stiffness, strong horizontal resistance, short water construction period, fewer auxiliary facilities, and is particularly suitable for shallow overburden and bare rock environments, and is increasingly favored by marine deep water bridge designers.

[0003] The positioning of the traditional sinking well foundation mainly uses an anchor pier positioning system, which mainly uses anchor piers set on the riverbed upstream and downstream of the sinking well foundation to position the sinking well foundation by winding and unwinding the cable on the anchor piers. However, this positioning system is mainly used for sinking well foundation positioning in shallow water with an overburden, and it is difficult to construct anchor piers in deep water bare rock environments, and the horizontal stiffness of the anchor piers is insufficient. SUMMARY

[0004] The embodiments of the present application provide a positioning system and method for setting a sinking well foundation on deep water bare rock to solve the technical problem that the traditional anchor pier positioning system in the related art is difficult to apply to deep water bare rock environments.

[0005] In a first aspect, a positioning system for setting a sinking well foundation on deep water bare rock is provided, comprising:

[0006] a plurality of gravity anchors for being spaced apart and arranged on the bare rock seabed around the sinking well foundation;

[0007] a cable assembly corresponding to each of the plurality of gravity anchors, a first end of each cable assembly being connected to the corresponding gravity anchor;

[0008] a winding and unwinding device corresponding to each of the plurality of cable assemblies, the winding and unwinding device being arranged on the sinking well foundation, and a second end of each cable assembly being connected to the corresponding winding and unwinding device; and

[0009] each winding and unwinding device is configured to wind and unwind the corresponding cable assembly to position the sinking well foundation at a designed position.

[0010] In some embodiments, each winding and unwinding device comprises:

[0011] a turning seat arranged on the sinking well foundation, the turning seat being configured to change the moving angle of the corresponding cable assembly;

[0012] a slide rail arranged on the caisson foundation and located on the side of the turning seat away from seawater;

[0013] a conversion joint arranged on the slide rail and capable of sliding along the slide rail, a first end of the conversion joint being connected with a second end of the corresponding cable assembly;

[0014] a strand of steel wire, a first end of which being connected with a second end of the conversion joint;

[0015] a counterforce seat arranged on the caisson foundation and located on the side of the slide rail away from the turning seat;

[0016] a continuous jack arranged on the counterforce seat, the continuous jack being connected with a second end of the strand of steel wire, the continuous jack being used to wind and unwind the strand of steel wire, thereby winding and unwinding the corresponding cable assembly to position the caisson foundation.

[0017] In some embodiments, each of the cable assemblies comprises:

[0018] a first cable, two ends of which are respectively provided with a first open-type cable joint and a first closed-type cable joint, the first open-type cable joint being connected with the corresponding gravity anchor;

[0019] a buoy, a side surface and a bottom end of which are respectively provided with a first auxiliary steel wire rope and a second auxiliary steel wire rope, the first auxiliary steel wire rope and the second auxiliary steel wire rope being detachably connected with the first cable;

[0020] a second cable, two ends of which are respectively provided with a second open-type cable joint and a second closed-type cable joint, the second open-type cable joint being connected with the first closed-type cable joint, and the second closed-type cable joint being connected with a first end of the corresponding conversion joint.

[0021] In some embodiments, each of the gravity anchors comprises:

[0022] an anchor body;

[0023] a tooth block arranged at the bottom of the front end of the anchor body;

[0024] a cable anchor seat arranged on the front end surface of the anchor body, the cable anchor seat being connected with the corresponding first open-type cable joint.

[0025] In some embodiments, each of the gravity anchors further comprises:

[0026] a plurality of lifting seats, which are arranged on the upper end surface of the anchor body at intervals.

[0027] In some embodiments, each of the gravity anchors further comprises:

[0028] a plurality of direction-adjusting cable seats, which are arranged on the upper end surface of the anchor body at intervals.

[0029] In some embodiments, the front end surface of the anchor body is an inclined surface and forms an angle of 20-25 degrees with the upper end surface of the anchor body.

[0030] In some embodiments, the middle part of the anchor body is provided with an exhaust hole penetrating through the upper end surface and the lower end surface.

[0031] In a second aspect, a positioning method for setting a caisson foundation on a bare rock seabed in deep water is provided, comprising the following steps:

[0032] After connecting a gravity anchor with the first end of the corresponding cable assembly, the gravity anchor is thrown and set on the bare rock seabed around the caisson foundation, and then the second end of the cable assembly is connected with the corresponding collecting device;

[0033] The above steps are repeated until the second end of all cable assemblies is connected with the corresponding collecting device;

[0034] All collecting devices are used to wind and unwind the corresponding cable assemblies, so that the caisson foundation is positioned at the designed position.

[0035] In some embodiments, the step of connecting a gravity anchor with the first end of the corresponding cable assembly, and then throwing and setting the gravity anchor on the bare rock seabed around the caisson foundation, and then connecting the second end of the cable assembly with the corresponding collecting device, specifically comprises:

[0036] The first open-type socket of the first cable of the cable assembly is connected with the corresponding gravity anchor, the first auxiliary steel wire rope and the second auxiliary steel wire rope of the float of the cable assembly are connected with the first cable, the gravity anchor lifting steel wire rope of the main hook of the floating crane is connected with the gravity anchor, the float lifting steel wire rope of the auxiliary hook of the floating crane is connected with the float, the gravity anchor and the float are synchronously lifted by using the floating crane, and then are synchronously lowered onto the bare rock seabed around the caisson foundation;

[0037] The second open-type socket of the second cable of the cable assembly is connected with the first closed-type socket, the connection between the first auxiliary steel wire rope and the second auxiliary steel wire rope and the first cable is released, the second cable is laid along the seabed surface to the vicinity of the designed position of the caisson foundation, the prefabricated caisson foundation is floated to the vicinity of the designed position, the second closed-type socket of the second cable is lifted above the top surface of the caisson foundation by using the floating crane, the hoisting steel wire rope of the winch of the caisson foundation top surface is connected with the second closed-type socket, the second closed-type socket is dragged horizontally by using the hoisting steel wire rope of the winch so as to pass through the turning seat of the collecting device, and then the second closed-type socket is connected with the first end of the conversion joint of the collecting device.

[0038] The technical solution provided by the application has the following beneficial effects:

[0039] The embodiment of the present application provides a positioning system and method for setting a sinking well foundation on a bare rock in deep water, the positioning system is provided with a plurality of gravity anchors, a plurality of cable assembly corresponding to the gravity anchors and a plurality of winding devices corresponding to the cable assembly, the winding devices are arranged on the sinking well foundation, all the winding devices can wind or unwind the corresponding cable assembly, so that the sinking well foundation can be positioned at the design position. Compared with the traditional anchor pier positioning system, the positioning system for setting the sinking well foundation on the bare rock in deep water does not need to construct the anchor pier, effectively solves the problem of difficult anchor pier construction in the bare rock environment, and the horizontal resistance of the gravity anchor does not change with the depth of seawater, effectively solves the problem of insufficient horizontal stiffness of the anchor pier positioning system in the deep water environment. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0041] Figure 1 A schematic diagram of a positioning system for setting a sinking well foundation on a bare rock in deep water is provided for the embodiment of the present application.

[0042] Figure 2 A top view of the embodiment of the present application is provided. Figure 1

[0043] Figure 3 A schematic diagram of a winding device is provided for the embodiment of the present application.

[0044] Figure 4 A top view of the connection between the cable assembly and the gravity anchor is provided for the embodiment of the present application.

[0045] Figure 5 A schematic diagram of the first cable or the second cable is provided for the embodiment of the present application.

[0046] Figure 6 A schematic diagram of the gravity anchor is provided for the embodiment of the present application.

[0047] Figure 7 A construction schematic diagram of the gravity anchor is provided for the embodiment of the present application.

[0048] Figure 8 A construction schematic diagram of the connection between the second cable and the winding device is provided for the embodiment of the present application.

[0049] Reference signs:

[0050] ​1. gravity anchor; 11. anchor body; 111. exhaust hole; 12. tooth block; 13. cable anchor seat; 14. lifting seat; 15. direction adjusting cable seat;

[0051] 2. cable assembly; 21. first cable; 211. first open-type cable joint; 212. first closed-type cable joint; 22. buoy; 221. first auxiliary wire rope; 222. second auxiliary wire rope; 23. second cable; 231. second open-type cable joint; 232. second closed-type cable joint;

[0052] 3. winding and unwinding device; 31. turning seat; 32. sliding rail; 33. conversion joint; 34. steel strand bundle; 35. counterforce seat; 36. continuous jack;

[0053] 4. caisson foundation;

[0054] 5. floating crane; 51. main hook; 52. gravity anchor lifting wire rope; 53. auxiliary hook; 54. buoy lifting wire rope;

[0055] 6. winch; 61. winch wire rope. DETAILED DESCRIPTION

[0056] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0057] The embodiments of the present application provide a positioning system for setting a caisson foundation on deep water bare rock, which can solve the technical problem that a traditional anchor pier positioning system is difficult to be applied to a deep water bare rock environment.

[0058] Referring to FIGS. 1, 2 and 3, Figure 1 and Figure 2 The embodiments of the present application provide a positioning system for setting a caisson foundation on deep water bare rock, which comprises a plurality of gravity anchors 1, a plurality of cable assemblies 2 corresponding to the plurality of gravity anchors 1 one by one, and a plurality of winding and unwinding devices 3 corresponding to the plurality of cable assemblies 2 one by one.

[0059] The plurality of gravity anchors 1 are arranged at intervals on a bare rock seabed around a caisson foundation 4. A first end of one cable assembly 2 is connected to a corresponding gravity anchor 1. The plurality of winding and unwinding devices 3 are arranged on the caisson foundation 4, and a second end of one cable assembly 2 is connected to a corresponding winding and unwinding device 3.

[0060] Each winding and unwinding device 3 is used to wind and unwind a corresponding cable assembly 2 to position the caisson foundation 4 at a designed position.

[0061] The positioning system for setting a sinking well foundation on a deep water bare rock in the embodiment of the present application is provided with a plurality of gravity anchors, a plurality of cable assemblies corresponding to the gravity anchors one by one, and a plurality of winding devices corresponding to the cable assemblies one by one. The winding devices are arranged on the sinking well foundation, and all the winding devices wind and unwind the corresponding cable assemblies to position the sinking well foundation at the designed position. The positioning system for setting a sinking well foundation on a deep water bare rock in the embodiment of the present application does not need to construct anchor piers compared with the traditional anchor pier positioning system, effectively solves the problem of difficult anchor pier construction in the bare rock environment, and the horizontal resistance of the gravity anchor does not change with the depth of seawater, effectively solves the problem of insufficient horizontal stiffness of the anchor pier positioning system in the deep water environment.

[0062] As an optional implementation, in one embodiment of the present application, referring to Figure 3 Each winding device 3 comprises a turning seat 31, a sliding rail 32, a conversion joint 33, a steel strand bundle 34, a counterforce seat 35, and a continuous jack 36.

[0063] The turning seat 31 is arranged on the sinking well foundation 4 and is used to change the moving angle of the corresponding cable assembly 2. The sliding rail 32 is arranged on the sinking well foundation 4 and is located on the side of the turning seat 31 away from seawater. The conversion joint 33 is arranged on the sliding rail 32 and can slide along the sliding rail 32. The first end of the conversion joint 33 is connected with the second end of the corresponding cable assembly 2. The first end of the steel strand bundle 34 is connected with the second end of the conversion joint 33. The counterforce seat 35 is arranged on the sinking well foundation 4 and is located on the side of the sliding rail 32 away from the turning seat 31. The continuous jack 36 is arranged on the counterforce seat 35. The second end of the steel strand bundle 34 is connected with the continuous jack 36. The continuous jack 36 is used to wind and unwind the steel strand bundle 34, and then wind and unwind the corresponding cable assembly 2 to position the sinking well foundation 4.

[0064] Specifically, the turning seat 31 is welded by steel plates, and the top surface and the side plates are provided with circular arc surfaces, the diameter ratio of the circular arc surfaces to the cable diameter is not less than 30, so as to reduce the bending stress of the cable. The conversion joint 33 is welded by steel plates, and the bottom of the conversion joint 33 is provided with a roller shaft, so as to realize sliding along the slide rail 32, and the cable can be prevented from being twisted. The conversion joint 33 and the slide rail 32 can be limited by the limiting plate, so as to prevent the conversion joint 33 from being separated from the slide rail 32, and further prevent the cable from being twisted. The slide rail 32 is arranged by two channel steels, and the diameters of the channel steels are connected by steel plates. The steel strand bundle 34 is composed of 30 φ15.2mm steel strands, and the bearing capacity is not less than 300t. The counterforce seat 35 is welded by steel plates, and is welded with the top surface of the caisson foundation 4 as a whole. The counterforce seat 35 is provided with a circular hole in the middle, so that the steel strand bundle 34 can pass through. The bearing capacity of the continuous jack 36 is 350t. The continuous jack 36 is connected with the cable assembly 2 through the conversion joint 33 and the steel strand bundle 34, so as to solve the problem that the cable assembly 2 cannot be directly tensioned by the continuous jack 36.

[0065] As an optional embodiment, in one embodiment of the application, as shown in Figure 4 and Figure 5 each cable assembly 2 comprises a first cable 21, a buoy 22 and a second cable 23. The diameters of the first cable 21 and the second cable 23 can be φ115mm.

[0066] The two ends of the first cable 21 are respectively provided with a first open cable joint 211 and a first closed cable joint 212, and the first open cable joint 211 is connected with the corresponding gravity anchor 1.

[0067] The side surface and the bottom end of the buoy 22 are respectively provided with a first auxiliary steel wire rope 221 and a second auxiliary steel wire rope 222, and the first auxiliary steel wire rope 221 and the second auxiliary steel wire rope 222 are detachably connected with the first cable 21.

[0068] The two ends of the second cable 23 are respectively provided with a second open cable joint 231 and a second closed cable joint 232, the second open cable joint 231 is connected with the first closed cable joint 212, and the second closed cable joint 232 is connected with the first end of the corresponding conversion joint 33.

[0069] The cable assembly 2 of the embodiment of the present application comprises a first cable 21, a buoy 22 and a second cable 23, the length of the first cable 21 is matched with the water depth at the designed position of the gravity anchor 1, the gravity anchor 1 is connected with the first cable 21 and the buoy 22 in advance on the ship, is floated to the sea area where the gravity anchor 1 is to be thrown and set, is integrally lifted by the floating crane 5 and is quickly positioned by the positioning system of the floating crane 5, the throwing and setting of the gravity anchor 1 is quickly completed during a small flow rate, and the quick throwing and setting of the gravity anchor 1 is realized.

[0070] As an optional implementation, in one embodiment of the present application, referring to Fig. 1, each gravity anchor 1 comprises an anchor body 11, a tooth block 12 and a cable anchor seat 13. Figure 6

[0071] The anchor body 11 is a concrete structure and has a weight of 1000t level, the tooth block 12 is arranged at the bottom of the front end of the anchor body 11, the tooth block 12 can be welded by a steel plate, the tooth block 12 can be deeply arranged in the overburden layer or the weathered rock layer, and the horizontal resistance of the gravity anchor 1 is improved. The cable anchor seat 13 is arranged on the front end surface of the anchor body 11, and the cable anchor seat 13 is connected with the corresponding first open cable joint 211.

[0072] Further, referring to Fig. 2, each gravity anchor 1 further comprises a plurality of lifting seats 14, the plurality of lifting seats 14 are arranged on the upper end surface of the anchor body 11 at intervals, and the plurality of lifting seats 14 facilitate the integral lifting of the gravity anchor 1. Figure 6 Further, referring to Fig. 3, each gravity anchor 1 further comprises a plurality of direction adjusting cable seats 15, the plurality of direction adjusting cable seats 15 are arranged on the upper end surface of the anchor body 11 at intervals, and the plurality of direction adjusting cable seats 15 are used for adjusting the plane angle of the gravity anchor 1 during anchor throwing, one end of a direction adjusting steel wire rope is hung on the direction adjusting cable seat 15, and the other end is fixed on a tugboat, the direction adjusting steel wire rope is retracted or extended by using the winch device on the tugboat, and the purpose of adjusting the angle of the gravity anchor 1 is achieved.

[0073] Figure 6 Further, referring to Fig. 4, the front end surface of the anchor body 11 is an inclined surface and has an included angle of 20-25 degrees with the upper end surface of the anchor body 11. The angle is close to the inclination angle of the lower end of the first cable 21 under the stress state, so as to reduce the eccentric stress of the cable anchor seat 13.

[0074] Further, referring to Fig. 5, the front end surface of the anchor body 11 is an inclined surface and has an included angle of 20-25 degrees with the upper end surface of the anchor body 11. The angle is close to the inclination angle of the lower end of the first cable 21 under the stress state, so as to reduce the eccentric stress of the cable anchor seat 13. Figure 6 Further, referring to Fig. 6, the front end surface of the anchor body 11 is an inclined surface and has an included angle of 20-25 degrees with the upper end surface of the anchor body 11. The angle is close to the inclination angle of the lower end of the first cable 21 under the stress state, so as to reduce the eccentric stress of the cable anchor seat 13.

[0075] Figure 6 ​​​As shown, the middle part of the anchor body 11 is provided with an exhaust hole 111 penetrating the upper end face and the lower end face, by arranging the exhaust hole 111 in the middle part of the anchor body 11, so that the air at the bottom of the anchor body 11 is discharged through the exhaust hole when the anchor body 11 is thrown, air is avoided to be accumulated at the bottom of the anchor body 11 to reduce the floating specific gravity of the gravity anchor 1, and the horizontal resistance of the gravity anchor 1 can be further improved.

[0076] The embodiment of the present application also provides a use method of the positioning system of the caisson foundation arranged on the bare rock in deep water, and the use method comprises the following steps:

[0077] After the first end of the gravity anchor 1 and the corresponding cable assembly 2 is connected, the gravity anchor 1 is thrown and arranged on the bare rock seabed around the caisson foundation 4, and then the second end of the cable assembly 2 is connected with the corresponding collecting device 3;

[0078] The above steps are repeated until the second end of all the cable assemblies 2 is connected with the corresponding collecting device 3;

[0079] The corresponding cable assembly 2 is reeled and unreeled by using all the collecting devices 3, so that the caisson foundation 4 is positioned at the designed position.

[0080] The positioning method of the caisson foundation arranged on the bare rock in deep water in the embodiment of the present application does not need to construct an anchor pier, effectively solves the problem that the anchor pier is difficult to construct in the bare rock environment, and the horizontal resistance of the gravity anchor does not change with the depth of seawater, effectively solves the problem that the horizontal rigidity of the anchor pier positioning system is insufficient in the deep water environment.

[0081] As an optional implementation, in one embodiment of the present application, the step of connecting the first end of the gravity anchor 1 and the corresponding cable assembly 2, and then throwing and arranging the gravity anchor 1 on the bare rock seabed around the caisson foundation 4, and then connecting the second end of the cable assembly 2 with the corresponding collecting device 3, specifically comprises:

[0082] Referring to Figure 7 As shown, the first open-type cable joint 211 of the first cable 21 of the cable assembly 2 is connected with the corresponding gravity anchor 1. The first auxiliary steel wire rope 221 and the second auxiliary steel wire rope 222 of the buoy 22 of the cable assembly 2 are connected with the first cable 21. The gravity anchor hoisting steel wire rope 52 of the main hook 51 of the floating crane 5 is connected with the gravity anchor 1, and the buoy hoisting steel wire rope 54 of the auxiliary hook 53 of the floating crane 5 is connected with the buoy 22. The gravity anchor 1 and the buoy 22 are synchronously hoisted by using the floating crane 5, and then are synchronously lowered on the bare rock seabed around the caisson foundation 4.

[0083] The cable assembly 2 of the embodiment of the present application comprises a first cable 21, a buoy 22 and a second cable 23, the length of the first cable 21 is matched with the water depth at the designed position of the gravity anchor 1, the gravity anchor 1 is connected with the first cable 21 and the buoy 22 in advance on the ship, is floated to the sea area where the gravity anchor 1 is to be disposed, is lifted as a whole by the floating crane 5 and is quickly positioned by the positioning system of the floating crane 5, and the gravity anchor 1 is quickly disposed during the period of small flow rate (flow rate less than 1 m / s), so that the quick disposal of the gravity anchor 1 is realized.

[0084] Referring to Figure 8 As shown in the figure, the second open-type cable joint 231 of the second cable 23 of the cable assembly 2 is connected with the first closed-type cable joint 212, the connection between the first auxiliary steel wire rope 221 and the second auxiliary steel wire rope 222 and the first cable 21 is released, and the second cable 23 is laid along the sea bed surface to the vicinity of the designed position of the caisson foundation 4. The prefabricated caisson foundation 4 is floated to the vicinity of the designed position, the second closed-type cable joint 232 of the second cable 23 is lifted by the floating crane 5 to above the top surface of the caisson foundation 4. The second closed-type cable joint 232 is connected with the hoisting steel wire rope 61 of the winch 6 on the top surface of the caisson foundation 4. The second closed-type cable joint 232 is horizontally dragged by the hoisting steel wire rope 61 of the winch 6 to pass through the turning seat 31 of the collecting device 3, and then is connected with the first end of the conversion joint 33 of the collecting device 3.

[0085] After the connection between the first cable 21 and the second cable 23 is completed, the second cable 23 is towed to the vicinity of the caisson foundation 4 by the tugboat, then the second cable 23 is lifted by the floating crane 5, and the winch 6 on the top surface of the caisson foundation 4 cooperates with the floating crane 5 to quickly connect the second cable 23 with the turning seat 31 and the conversion joint 33, so that the quick connection between the second cable 23 and the collecting device 3 is realized.

[0086] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms “upper”, “lower” and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connection” should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0087] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one from another entity or action, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0088] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the scope of the application is intended to be defined only as set forth in the claims.

Claims

1. A positioning system for setting up caisson foundations in deep-water bare rock, characterized in that, include: Multiple gravity anchors (1) are used to be spaced out on the bare rock seabed around the caisson foundation (4); Cable assemblies (2) corresponding one-to-one with the plurality of gravity anchors (1), with the first end of one of the cable assemblies (2) connected to the corresponding gravity anchor (1); A take-up device (3) corresponding to each of the cable assemblies (2) is mounted on the caisson foundation (4), and one of the take-up devices (3) is connected to the second end of the corresponding cable assembly (2); and Each of the aforementioned retrieval devices (3) is used to retrieve and deploy the corresponding cable assembly (2) to position the caisson foundation (4) at the designed location; Each of the aforementioned collection devices (3) includes: A steering seat (31), which is located on the caisson foundation (4), is used to change the movement angle of the corresponding cable assembly (2); The slide rail (32) is provided on the caisson foundation (4) and is located on the side of the steering seat (31) away from the seawater; A conversion connector (33) is provided on the slide rail (32) and can slide along the slide rail (32). The first end of the conversion connector (33) is connected to the second end of the corresponding cable assembly (2). A steel strand bundle (34), the first end of which is connected to the second end of the adapter (33); The reaction seat (35) is provided on the caisson foundation (4) and located on the side of the slide rail (32) away from the steering seat (31); A continuous jack (36) is provided on the reaction seat (35). The continuous jack (36) is connected to the second end of the steel strand bundle (34). The continuous jack (36) is used to take up and put down the steel strand bundle (34), and then take up and put down the corresponding cable assembly (2) to position the caisson foundation (4). Each of the cable assemblies (2) includes: The first cable (21) has a first open section (211) and a first closed section (212) at its two ends, and the first open section (211) is connected to the corresponding gravity anchor (1); The pontoon (22) is provided with a first auxiliary steel wire rope (221) and a second auxiliary steel wire rope (222) on its side and bottom respectively. The first auxiliary steel wire rope (221) and the second auxiliary steel wire rope (222) are detachably connected to the first cable (21). The second cable (23) has a second open section (231) and a second closed section (232) at its two ends respectively. The second open section (231) is connected to the first closed section (212), and the second closed section (232) is connected to the first end of the corresponding adapter (33).

2. The positioning system for setting up caisson foundations in deep-water bare rock according to claim 1, characterized in that, Each of the gravity anchors (1) includes: Anchor body (11); Toothed block (12), which is located at the bottom of the front end of the anchor body (11); A cable anchor (13) is provided on the front end face of the anchor body (11), and the cable anchor (13) is connected to the corresponding first open cable joint (211).

3. The positioning system for setting up caisson foundations in deep-water bare rock according to claim 2, characterized in that, Each of the gravity anchors (1) further includes: Multiple lifting seats (14) are spaced apart on the upper surface of the anchor body (11).

4. The positioning system for setting up caisson foundations in deep-water bare rock according to claim 2, characterized in that, Each of the gravity anchors (1) further includes: Multiple directional cable seats (15) are spaced apart on the upper surface of the anchor body (11).

5. The positioning system for setting up caisson foundations in deep-water bare rock according to claim 2, characterized in that: The front end face of the anchor (11) is an inclined surface and the angle between the front end face and the upper end face of the anchor (11) is 20 degrees to 25 degrees.

6. The positioning system for setting up caisson foundations in deep-water bare rock according to claim 2, characterized in that: The anchor body (11) is provided with an exhaust hole (111) that penetrates the upper and lower end faces in the middle.

7. A positioning method for setting up a caisson foundation in deep-water bare rock, using the positioning system for setting up a caisson foundation in deep-water bare rock as described in claim 1, characterized in that, Includes the following steps: After connecting a gravity anchor (1) to the first end of the corresponding cable assembly (2), it is thrown onto the bare rock seabed around the caisson foundation (4), and then the second end of the cable assembly (2) is connected to the corresponding retrieval device (3). Repeat the above steps until the second end of all cable assemblies (2) is connected to the corresponding take-up device (3); Use all the retrieval devices (3) to retrieve and release the corresponding cable assemblies (2) so that the caisson foundation (4) is positioned at the design location.

8. The positioning method for setting up caisson foundations in deep-water bare rock according to claim 7, characterized in that, The steps of connecting a gravity anchor (1) to the first end of the corresponding cable assembly (2), dropping it onto the bare rock seabed around the caisson foundation (4), and then connecting the second end of the cable assembly (2) to the corresponding retrieval device (3) specifically include: Connect the first open section (211) of the first cable (21) of the cable assembly (2) to the corresponding gravity anchor (1), connect the first auxiliary wire rope (221) and the second auxiliary wire rope (222) of the pontoon (22) of the cable assembly (2) to the first cable (21), connect the gravity anchor lifting wire rope (52) of the main hook (51) of the floating crane (5) to the gravity anchor (1), connect the pontoon lifting wire rope (54) of the auxiliary hook (53) of the floating crane (5) to the pontoon (22), use the floating crane (5) to lift the gravity anchor (1) and the pontoon (22) simultaneously, and then lower them simultaneously to the bare rock seabed around the caisson foundation (4); Connect the second open section (231) of the second cable (23) of the cable assembly (2) to the first closed section (212), disconnect the first auxiliary wire rope (221) and the second auxiliary wire rope (222) from the first cable (21), and lay the second cable (23) along the seabed to the vicinity of the designed position of the caisson foundation (4). Float the prefabricated caisson foundation (4) to the vicinity of the designed position, and use the floating crane (5) to connect the second closed section of the second cable (23). The second closed cable section (232) is lifted to the top surface of the caisson foundation (4). The second closed cable section (232) is connected to the winch wire rope (61) of the winch (6) on the top surface of the caisson foundation (4). The winch wire rope (61) of the winch (6) is used to horizontally pull the second closed cable section (232) so that it passes through the steering seat (31) of the retrieval device (3). Then the second closed cable section (232) is connected to the first end of the conversion joint (33) of the retrieval device (3).

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