Deepwater pile construction vessel and pile construction method

Abstract

This invention relates to a deep-water pile-erecting vessel and a pile-erecting method, belonging to the field of engineering construction technology. The vessel includes a hull, a gantry frame, a rotating mechanism, and a first winch. The hull is provided with a limiting groove for restricting the position of the casing assembly on the water surface. The limiting groove is vertically oriented through the hull and extends horizontally along the left and right directions of the hull. The gantry frame is installed on the hull and located above the limiting groove. The gantry frame is connected to a hook for hoisting the casing assembly. The rotating mechanism supports the rotation of the casing assembly. The rotating mechanism is rotatably connected to the hull and connected to the casing assembly. The first winch is located on the hull and connected to the end of the casing assembly away from the rotating mechanism via a first wire rope. The first winch is used to wind up or release the first wire rope. This deep-water pile-erecting vessel enables the casing assembly to rotate and be vertically positioned in the water using buoyancy, thus completing the pile-erecting construction underwater. Furthermore, the overall structure is simple and the construction is convenient.

Description

Technical Field

[0001] This invention belongs to the field of engineering construction technology, and in particular relates to a deep-water pile erection vessel and a pile erection method. Background Technology

[0002] Drilled cast-in-place piles are a common method for deep-water pile foundation construction. First, a casing is inserted into the water and vertically extended into the bottom soil layer. Then, concrete is poured inside the casing, and after the concrete pouring is complete, the casing is removed. In actual construction, to ensure the casing extends vertically into the bottom soil layer, it is first erected vertically in the water (i.e., pile erection). Erecting the pile is a crucial step in drilled cast-in-place pile construction, directly affecting the verticality of the concrete pile. Due to the considerable length of the casing, it is usually transported horizontally. Once at the construction location, the casing is erected and submerged in the water. Currently, double-crane vessels are often used to lift the casing, allowing it to rotate vertically around one end, or a single crane vessel is used in conjunction with a pile turner or pile erecting trolley for pile erection. For deep-water cast-in-place pile construction, the greater length of the casing places higher demands on the lifting capacity and height of the crane vessels, increasing the difficulty of erecting the casing. Patent CN109853567A discloses a method for driving embedded steel pipe piles for offshore wind power. This method uses a large construction vessel to vertically erect the steel pipe pile above the water surface and then vertically extend it into the water to complete the pile erection process. While using a large construction vessel can meet the requirements for lifting weight and height, enabling the erection of the casing, the large size and complex structure of these vessels increase construction costs, and their bulk also increases the area required for construction. Therefore, the existing pile erection method is not suitable for deep-water cast-in-place pile construction. Summary of the Invention

[0003] To address the shortcomings of related technologies, this invention provides a deep-water pile-erecting vessel and a pile-erecting construction method, which simplifies the structure of the vessel and enables the casing assembly to be vertically installed in the water under buoyancy, thereby completing the pile-erecting construction.

[0004] This invention provides a deep-water pile-erecting vessel for vertically positioning a casing assembly in the water; the vessel includes:

[0005] The hull is provided with a limiting groove for limiting the position of the casing assembly on the water surface. The limiting groove is set vertically through the hull and extends horizontally along the left and right directions of the hull in the horizontal plane.

[0006] A gantry crane is installed on the hull and located above the limiting slot; the gantry crane is connected to hooks for lifting and / or towing the casing assembly;

[0007] A rotating mechanism is used to support the rotation of the casing assembly; the rotating mechanism is rotatably connected to the hull and connected to the casing assembly;

[0008] The first winch is located on the hull and connected to the end of the casing assembly away from the rotating mechanism via the first wire rope; the first winch is used to wind up or release the first wire rope.

[0009] This technical solution involves setting up a gantry crane and using hooks to drag the casing assembly to transport it to the location where construction is needed; by setting up a rotating mechanism, the casing assembly is rotatably connected to the hull, allowing it to rotate from floating on the water surface to being vertically positioned in the water with the help of buoyancy; and by setting up a first winch, the direction of the casing assembly is constrained during the pile erection process to prevent it from tilting.

[0010] In some embodiments, the hull is provided with a connector corresponding to the first winch, one end of the first wire rope is connected to the first winch, and the other end of the first wire rope passes through the lifting lug of the casing assembly and is connected to the connector.

[0011] In some embodiments, the limiting groove has an opening facing the left side of the hull; the protective sleeve assembly extends into the limiting groove through the opening.

[0012] In addition, the present invention also provides a method for erecting a casing assembly, wherein the casing assembly is vertically positioned in the water using the aforementioned deep-water pile-erecting vessel; the pile-erecting method includes:

[0013] The casing assembly is inserted from the slot into the limiting slot and connected to the hull by a tugboat.

[0014] The vessel towed the casing assembly to the location where construction was to be carried out;

[0015] Connect one end of the first wire rope to the first winch, and connect the other end of the first wire rope through the lifting lug of the casing assembly to the connector; connect the end of the casing assembly away from the first wire rope to the rotating mechanism.

[0016] Increase the gravity on the casing assembly or decrease the buoyancy on the casing assembly so that the end of the casing assembly away from the rotating mechanism rotates downward in the vertical plane until the casing assembly is vertically placed in the water; and the first winch releases the first wire rope.

[0017] In some embodiments, the casing assembly rotates in a vertical plane under the combined action of gravity, buoyancy, and / or the pull of the first winch.

[0018] In some embodiments, the buoyancy and / or gravity acting on the casing assembly are adjusted by regulating the amount of water entering the casting cavity inside the casing assembly.

[0019] In some embodiments, as the casing assembly rotates downward, the hook pulls the casing assembly upward to prevent the end of the casing assembly away from the rotating mechanism from contacting the underwater soil layer.

[0020] In addition, the present invention also provides a method for constructing deep-water bored piles, including a method for erecting piles using the aforementioned casing assembly.

[0021] Based on the above technical solution, the deep-water pile-erecting vessel in this embodiment of the invention can transport the casing assembly and carry out pile-erecting construction, so that the casing assembly can rotate in the water and be vertically set by using buoyancy to complete the pile-erecting construction underwater; and the overall structure is simple and the construction is convenient. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the assembly of the deep-water pile driving vessel and the casing assembly of the present invention.

[0024] Figure 2 This is a structural schematic diagram from another angle of the assembly of the deep-water pile driving vessel and the casing assembly of the present invention.

[0025] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0026] Figure 4 This is a structural schematic diagram of the deep-water pile-erecting vessel of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the deep-water pile driving vessel transporting the casing assembly according to the present invention;

[0028] Figure 6 This is a structural diagram of the deep-water pile-erecting vessel of the present invention when it begins pile-erecting construction.

[0029] Figure 7 This is a structural schematic diagram of the deep-water pile-erecting vessel of the present invention during the pile-erecting construction process;

[0030] Figure 8 This is a schematic diagram of the structure of the deep-water pile erection vessel of the present invention when the pile erection is completed;

[0031] Figure 9 This is a schematic diagram of the deep-water pile driving vessel of the present invention when inserting the casing assembly into the bottom soil layer;

[0032] Figure 10 This is a schematic diagram of the deep-water pile driving vessel of the present invention when the removable casing and the permanent casing are separated;

[0033] Figure 11 This is a schematic diagram of the structure of the deep-water pile driving vessel of the present invention when the removable casing is moved horizontally.

[0034] Figure 12 This is a schematic diagram of the structure of the deep-water pile driving vessel of the present invention when the removable casing begins to rotate upward in a vertical plane;

[0035] Figure 13 This is a schematic diagram of the structure of the deep-water pile driving vessel of the present invention after the removable casing is rotated upwards in the vertical plane by a certain angle.

[0036] Figure 14 This is a schematic diagram of the deep-water pile driving vessel of the present invention, showing a removable protective casing floating on the water surface.

[0037] Figure 15 This is a structural diagram of the deep-water pile driving vessel of the present invention during the removal of the removable casing.

[0038] In the picture:

[0039] 1. Casing assembly; 2. Hull; 3. Gantry crane; 4. Second winch; 5. Impact hammer; 6. Rotating mechanism; 7. Drilling rig; 8. First wire rope; 9. Second wire rope; 10. Underwater soil layer;

[0040] 11. Removable casing; 12. Permanent casing; 13. Shear-resistant blocks;

[0041] 111. Casing connection; 112. Second lifting lug; 113. Third lifting lug; 121. First lifting lug; 21. First winch; 22. Connecting piece; 23. Limiting groove;

[0042] 31. Hook. Detailed Implementation

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] The terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] It should also be noted that, for the purpose of illustrating the construction process, in Figures 5-15 The removable casing 11 has been simplified. Figures 1-15 In order to facilitate the illustration of the connection relationship and position of the construction vessel and the split casing structure 1 in a certain construction step, components that are not closely related to the construction step or are not used in the construction step have been simplified or omitted to varying degrees without affecting the understanding of the technical solution of the present invention.

[0048] As attached Figures 1-4 As shown, in an illustrative embodiment of the deep-water pile erection vessel of the present invention, the vessel is used for pile transportation and erection in deep-water bored pile construction; the vessel includes a hull 2, a gantry 3, a rotating mechanism 6, and a first winch 21.

[0049] Among the aforementioned deep-water pile-erecting vessels, such as Figure 1 , Figure 2 and Figure 4 As shown, the hull 2 ​​has a limiting groove 23 extending horizontally. The limiting groove 23 is set vertically through the hull 2 ​​and is used to constrain the position of the casing assembly 1 on the water surface to prevent the casing assembly 1 from floating randomly on the water surface during the pile transportation process. It should be noted that the limiting groove 23 has a slot opened horizontally, which is set towards the left side of the hull 2 ​​and extends away from the rotating mechanism 6. The casing assembly 1 extends into the limiting groove 23 through the slot.

[0050] Among the aforementioned deep-water pile-erecting vessels, such as Figure 1As shown, the gantry 3 is installed on the hull 2 ​​and located above the limiting groove 23. The gantry 3 is connected to a hook 31 for hoisting or towing the casing assembly 1. It should be noted that in some embodiments, the casing assembly 1 is connected to the hook 31, and the construction vessel tows the casing assembly 1 floating on the water surface through the hook 31 to transport the casing assembly 1. It should also be noted that the movement of the construction vessel towing the casing assembly 1 is prior art and will not be described in detail here.

[0051] Among the aforementioned deep-water pile-erecting vessels, such as Figure 1 and Figure 4 As shown, the rotating mechanism 6 is connected to the casing assembly 1 and supports its rotation; the rotating mechanism 6 is rotatably connected to the hull 2 ​​and is located near the limiting groove 23. The rotating mechanism 6 is connected to the casing assembly 1 so that the split structure 1 is rotatably connected to the hull 2 ​​through the rotating mechanism 6. It should be noted that during the pile erection process, in order to prevent the casing assembly 1 from contacting the underwater soil layer 10, the hook 31 pulls the casing assembly 1 upward. In order to enable the casing assembly 1 to simultaneously complete the upward lifting and downward rotation actions, in some embodiments, the casing assembly 1 is rotatably connected to the rotating mechanism 6, the rotating mechanism 6 is rotatably connected to the hull 2, and the rotating shaft of the rotating mechanism 6 and the hull 2 ​​rotates relative to each other. The rotating shafts of the rotating mechanism 6 that cause relative rotation are parallel and non-collinear; the hook 31 is connected to the end of the protective casing assembly 1 near the rotating mechanism 6. When the hook 31 pulls the protective casing assembly 1 upward, the rotating mechanism 6 is also pulled upward along with the protective casing assembly 1 because it is connected to the protective casing assembly 1. Since the rotating mechanism 6 is rotatably connected to the hull 2, the rotating mechanism 6 rotates upward with its connection point with the hull 2 ​​as the center. That is, the height of the connection point between the protective casing assembly 1 and the rotating mechanism 6 increases. The increase in the height of the connection point between the protective casing assembly 1 and the rotating mechanism 6 will not interfere with the relative rotation between the protective casing assembly 1 and the rotating mechanism 6. This is common knowledge in the art and will not be described in detail here.

[0052] Among the aforementioned deep-water pile-erecting vessels, such as Figure 1As shown, the first winch 21 is located on the hull 2 ​​and is used to wind up or release the first wire rope 8. The end of the first wire rope 8 away from the first winch 21 is connected to the end of the casing assembly 1 away from the rotating mechanism 6 to constrain the direction of the casing assembly 1 during pile erection. When the casing assembly 1 is erecting the pile, the first wire rope 8 applies tension to the casing assembly 1 to prevent it from tilting along the fore-and-aft direction of the hull 2. The first wire rope 8 can also apply an upward tension to the casing assembly 1. By controlling the release speed of the first wire rope 8, the downward rotation speed of the casing assembly 1 can be adjusted, thereby allowing the casing assembly 1 to rotate slowly and vertically downward. It should be noted that, in order to ensure that the casing assembly 1 is subjected to balanced forces, the casing assembly 1 is connected to two first winches 21 respectively through two first wire ropes 8. The two first winches 21 are symmetrically arranged. The limiting groove 23 is located on both sides of the front and rear sides. It should also be noted that, in order to facilitate the release of the first wire rope 8 from the casing assembly 1 after the casing assembly 1 is erected, the casing assembly 1 is provided with a fourth lifting lug, and the hull 2 ​​is provided with a connector 22. The end of the first wire rope 8 away from the first winch 21 passes through the fourth lifting lug and connects to the connector 22. The connector 22 is used to bind the first wire rope 8. The connector 22 is correspondingly set with the first winch 21 and is located on the left side of the hull 2. In addition, it should be noted that the connector 22, the connection between the casing assembly 1 and the rotating mechanism 6, and the fourth lifting lug are triangularly distributed in the vertical plane so that the first wire rope 8 can apply a vertically inclined force to the casing assembly 1 in the vertical plane, thereby constraining the direction of the erection of the casing assembly 1 and preventing the casing assembly 1 from tilting in the front and rear direction of the hull 2.

[0053] In some embodiments, the fourth lifting lug is the second lifting lug 112, that is, the second lifting lug 112 is connected to both the first wire rope 9 and the second wire rope 8, so as to simplify the structure of the removable protective sleeve 11.

[0054] Among the aforementioned deep-water pile-erecting vessels, such as Figure 2 As shown, the hull 2 ​​is also equipped with a pile gripper and an impact hammer 5. The pile gripper is used to grip the casing assembly 1. The pile gripper is connected to the end of the casing assembly 1 away from the rotating mechanism 6 and is set near the limiting groove 23. The impact hammer 5 is used to apply a downward force to the casing assembly 1 to insert the casing assembly 1 into the underwater soil layer 10. The hull 2 ​​is also equipped with a drilling rig 7, which is set near the gantry 3. Since the impact action of the impact hammer 5 alone may not be able to insert the permanent casing 12 to a specific depth, especially when the underwater soil layer 10 contains rocks, the drilling rig 7 drills and strikes the rocks to assist the impact hammer 5 in inserting the permanent casing 12 into the designated depth in the underwater soil layer 10.

[0055] The aforementioned deep-water pile-erecting vessel is capable of transporting and erecting the casing assembly 1, allowing the casing assembly 1 to rotate using buoyancy to complete the pile-erecting construction underwater; and the overall structure is simple and the construction is convenient.

[0056] Based on the aforementioned construction vessel, the present invention also provides a method for erecting a casing assembly, wherein the casing assembly 1 is vertically installed in the water using the aforementioned construction vessel; the method includes the following steps:

[0057] The casing assembly 1 floats horizontally on the water surface under the action of buoyancy. The casing assembly 1 is inserted into the limiting groove 23 through the slot by a tugboat and connected to the hull 2 ​​so that the hull 2 ​​can tow the casing assembly 1 to the construction position.

[0058] Connect one end of the first wire rope 8 to the first winch 21, and pass the other end of the first wire rope 8 through the fourth lifting lug and connect it to the connector 22; connect the end of the removable casing 11 away from the permanent casing 12 to the rotating mechanism 6.

[0059] Adjust the ballast water volume inside the casing assembly 1 to adjust the buoyancy and gravity of the casing assembly 1, so that the end of the casing assembly 1 away from the rotating mechanism 6 rotates vertically downward until the casing assembly 1 is vertically placed in the water; it should be noted that during the process of the casing assembly 1 rotating vertically downward, the hook 31 pulls the casing assembly 1 upward to prevent the end of the casing assembly 1 away from the rotating mechanism 6 from contacting the bottom soil layer 10.

[0060] Check the verticality of the casing assembly 1 to ensure that the casing assembly 1 is vertically installed in the water.

[0061] It should be noted that when the buoyancy of the casing assembly 1 is greater than its own weight, the casing assembly 1 floats on the water surface; when the buoyancy of the casing assembly 1 is less than its own weight, the casing assembly 1 sinks in the water. The adjustment of buoyancy is a well-known technical skill and will not be elaborated here. It should also be noted that by adjusting the water inflow into the casting cavity inside the casing assembly 1, the buoyancy and / or weight of the casing assembly 1 can be adjusted, thereby controlling the movement of the casing assembly 1.

[0062] The above-mentioned method for erecting the casing assembly reduces the buoyancy of the casing assembly 1, allowing the end of the casing assembly 1 away from the rotating mechanism 6 to rotate vertically downwards, so that the casing assembly 1 is vertically set underwater, thereby reducing the requirements for the lifting weight and height of the construction vessel.

[0063] In addition, the present invention also provides a method for constructing deep-water bored piles, including a method for erecting piles using the aforementioned casing assembly.

[0064] In some embodiments, such as Figures 1-3As shown, the casing assembly 1 includes a permanent casing 12 and a removable casing 11; the removable casing 11 and the permanent casing 12 are coaxially arranged and connected to the rotating mechanism 6. The end of the removable casing 11 away from the rotating mechanism 6 is provided with a casing connecting part 111, which is detachably sleeved with the permanent casing 12, allowing for a detachable connection between the removable casing 11 and the permanent casing 12; both the removable casing 11 and the permanent casing 12 have axially extending cavities inside. The cavity inside the removable casing 11 communicates with the cavity inside the permanent casing 12 to form a pouring cavity. Concrete is poured into the pouring cavity to form a concrete pile; the permanent casing 11... The casing 12 is inserted into the underwater soil layer 10. The removable casing 11 separates from the permanent casing 12 after the concrete pile is cast, allowing for the recovery and recycling of the removable casing 11. It should be noted that the permanent casing 12 is connected to the removable casing 11 via a second steel wire rope 9. When the permanent casing 12 is inserted into the underwater soil layer 10, the permanent casing 12 and the removable casing 11 are rigidly connected via the second steel wire rope 9 to increase the strength of the connection. When recovering the removable casing 11, the permanent casing 12 and the removable casing 11 are flexibly connected via the second steel wire rope 9 to facilitate the upward rotation of the removable casing 11. It should also be noted that... The permanent casing 12 is provided with a first lifting lug 121, and the removable casing 11 is provided with a second lifting lug 112 and a third lifting lug 113. The first lifting lug 121 is symmetrically arranged on the outer periphery of the end of the permanent casing 12 away from the underwater soil layer 10. The second lifting lug 112 is arranged in a corresponding position to the first lifting lug 121 and symmetrically arranged on the outer periphery of the end of the removable casing 11 connected to the permanent casing 12. The third lifting lug 113 is arranged in a corresponding position to the second lifting lug 112 and symmetrically arranged on the outer periphery of the end of the removable casing 11 away from the permanent casing 12. One end of the second wire rope 9 is bound to the third lifting lug 113, and the other end of the second wire rope 9 is sequentially threaded through the second lifting lug 112, the third lifting lug 113, and the fourth lifting lug 113. A lifting lug 121 is connected to a second winch 4, which is installed on the hull 2 ​​and is used to wind or release the second wire rope 9. A fourth lifting lug is located at one end of the removable casing 11 near the permanent casing 12. It should also be noted that, in order to prevent relative rotation of the removable casing 11 and the permanent casing 12 along the axial direction during the drilling process of the drilling rig 7, an anti-shear block 13 is provided between the removable casing 11 and the permanent casing 12. In addition, it should be noted that the hull 2 ​​is equipped with two second winches 4, which are symmetrically arranged on the front and rear sides of the limiting groove 23 and connected to the two second wire ropes 9 respectively, so that the casing assembly 1 is subjected to balanced force.

[0065] In other embodiments, the removable casing 11 includes several casing segments, which are detachably connected end to end, so that the length of the removable casing 11 can be spliced ​​according to actual construction needs to meet different water depth requirements; the casing segment has a first end and a second end, and the second end is provided with a segment connecting part, which is sleeved with the first end of the adjacent casing segment; adjacent casing segments are connected by a sealing element to prevent concrete from leaking from the gap between adjacent casing segments during pouring.

[0066] The following section uses the construction of the water intake of the Qinghai Province Yellow River Diversion Project in Jining as an example to detail the construction method of pile erection and deep-water bored pile using casing assembly 1. The construction of the deep-water bored pile specifically includes the following steps:

[0067] Erecting piles: Adjust the water inlet in the pouring cavity inside the casing assembly 1 so that the buoyancy of the casing assembly 1 is greater than the weight, thereby making the casing assembly 1 float on the water surface; use a tugboat to extend the casing assembly 1 from the slot into the limiting slot 23 to restrict the movement of the casing assembly 1 on the water surface; connect the end of the removable casing 11 away from the permanent casing 12 to the rotating mechanism 6 and the hook 31 so that the casing assembly 1 can be transported to the construction position under the action of the pulling force of the hook 31 and the buoyancy of deep water.

[0068] The first wire rope 8 is connected to the first winch 21, the connector 22, and the casing assembly 1 to reduce the buoyancy of the casing assembly 1, so that the casing assembly 1 rotates vertically downward until it is vertically positioned in the water. When the casing assembly 1 begins to rotate vertically downward, the first winch 21 releases the first wire rope 8, and the hook 31 pulls upward to remove the end of the casing 11 away from the permanent casing 12, so as to prevent the permanent casing 12 from contacting the bottom soil layer 10 and damaging the permanent casing 12.

[0069] Piling: After the verticality of the casing assembly 1 is checked and meets the construction requirements, the first wire rope 8 is released from the casing assembly 1, and the second winch 4 winds up the second wire rope 9 to tighten it, increasing the firmness of the connection between the removable casing 11 and the permanent casing 12. The pile gripper and the impact hammer 5 work together, with the pile gripper gripping the removable casing 11 and the impact hammer 5 hammering the removable casing 11 to insert the permanent casing 12 into the underwater soil layer 10. After the impact hammer 5 hammers the removable casing 11 for a period of time, if the permanent casing 12 is inserted into the water... If the depth of the bottom soil layer 10 remains unchanged and has not reached the design depth, the drilling rig 7 drills into the bottom soil layer 10 to reduce its hardness. The impact hammer 5 continues to hammer the removable casing 11, increasing the depth to which the permanent casing 12 is inserted into the bottom soil layer 10. If, after the impact hammer 5 continues to hammer for a period of time, the depth to which the permanent casing 12 is inserted into the bottom soil layer 10 no longer changes and has not reached the design depth, the drilling rig 7 drills into the bottom soil layer 10 again, and the impact hammer 5 continues to hammer the removable casing 11. This cycle continues until the depth to which the permanent casing 12 is inserted into the bottom soil layer 10 meets the construction requirements.

[0070] Concrete pouring: Concrete is poured into the casing assembly through the grouting pipe installed on the construction vessel to form a concrete pile;

[0071] Removal of the removable casing: The second winch 4 releases the second wire rope 9, and the hook 31 lifts the removable casing 11 vertically upward until it separates from the concrete pile. Then, the construction vessel moves horizontally to move the removable casing 11 horizontally. The buoyancy of the removable casing 11 is increased, and the end of the removable casing 11 connected to the permanent casing 12 rotates vertically upward until the removable casing 11 floats on the water surface horizontally. The connection between the second wire rope 9 and the third lifting lug 113 is released, and the second winch 4 winds up the second wire rope 9, causing the second wire rope 9 to disengage from the first lifting lug 121 and the second lifting lug 112, thereby releasing the connection between the removable casing 11 and the permanent casing 12, so that the removable casing 11 can be recovered and recycled.

[0072] It should be noted that adjusting the buoyancy of the removable sleeve 11 by adjusting the amount of water in the internal cavity of the removable sleeve 11 cannot smoothly adjust the buoyancy of the removable sleeve 11. When removing the removable sleeve 11, the upward rotation speed of the removable sleeve 11 may be too fast or too slow. When the upward rotation speed of the removable sleeve 11 is too fast, the upward rotation speed of the removable sleeve 11 can be reduced by adjusting the length of the second steel wire rope 9 so that the second steel wire rope 9 applies a downward pulling force to the removable sleeve 11, thereby enabling the removable sleeve 11 to rotate upward smoothly.

[0073] The above-mentioned deep-water bored pile construction method uses a construction vessel to transport, erect, and dismantle the casing assembly 1. The permanent casing 12 is inserted into the underwater soil layer 10 using the impact hammer 5 of the construction vessel. After construction is completed, the removable casing 11 can be separated from the permanent casing 12, which can realize the recycling of the removable casing 11, thereby reducing construction costs. Furthermore, the method of dismantling and separating the permanent casing 12 from the removable casing 11 is simple and easy to operate.

[0074] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A deep-water pile-erecting vessel for vertically installing casing assemblies in water; characterized in that, The construction vessel includes: The hull is provided with a limiting groove for limiting the position of the casing assembly on the water surface. The limiting groove is provided vertically through the hull and extends horizontally along the left and right directions of the hull in the horizontal plane. A gantry crane is installed on the hull and located above the limiting groove; the gantry crane is connected to hooks for hoisting and / or towing the casing assembly; A rotating mechanism is used to support the rotation of the casing assembly; the rotating mechanism is rotatably connected to the hull and connected to the casing assembly. A first winch is located on the hull and connected to the end of the protective cylinder assembly away from the rotating mechanism via a first wire rope; the first winch is used to wind up or release the first wire rope. The sleeve assembly includes a permanent sleeve and a removable sleeve; the removable sleeve is coaxially arranged with the permanent sleeve and connected to the rotating mechanism; the end of the removable sleeve away from the rotating mechanism is provided with a sleeve connecting part, and the sleeve connecting part is detachably sleeved with the permanent sleeve. The permanent casing is connected to the removable casing via a second steel wire rope. When the permanent casing is inserted into the underwater soil layer, the permanent casing and the removable casing are rigidly connected via the second steel wire rope. When the removable casing is recycled, the permanent casing and the removable casing are flexibly connected by a second steel wire rope.

2. The deep-water pile-erecting vessel according to claim 1, characterized in that, The hull is provided with a connector corresponding to the first winch. One end of the first wire rope is connected to the first winch, and the other end of the first wire rope passes through the lifting lug of the casing assembly and is connected to the connector.

3. The deep-water pile-erecting vessel according to claim 2, characterized in that, The limiting groove has an opening, which faces the left side of the hull; the protective sleeve assembly extends into the limiting groove through the opening.

4. A method for erecting piles using a casing assembly, characterized in that, The casing assembly is vertically installed in the water using the deep-water pile-erecting vessel as described in claim 3; the pile-erecting method includes: The casing assembly extends from the slot into the limiting groove and is connected to the hull. The vessel tows the casing assembly to the location where construction is to be carried out. Connect one end of the first wire rope to the first winch, and connect the other end of the first wire rope through the lifting lug of the casing assembly to the connector; connect the end of the casing assembly away from the first wire rope to the rotating mechanism; Increase the gravity on the casing assembly or decrease the buoyancy on the casing assembly so that the end of the casing assembly away from the rotating mechanism rotates downward in the vertical plane until the casing assembly is vertically positioned in the water; and the first winch releases the first wire rope.

5. The method for erecting piles using the casing assembly according to claim 4, characterized in that, The casing assembly rotates in a vertical plane under the combined action of gravity, buoyancy, and / or the pulling force of the first winch.

6. The method for erecting piles using the casing assembly according to claim 4, characterized in that, The buoyancy and / or gravity acting on the casing assembly can be adjusted by regulating the water inflow into the casting cavity inside the casing assembly.

7. The method for erecting piles using the casing assembly according to claim 4, characterized in that, During the downward rotation of the casing assembly, the hook pulls the casing assembly upward to prevent the end of the casing assembly away from the rotating mechanism from contacting the bottom soil layer.

8. A method for constructing deep-water bored piles, characterized in that, The method for erecting piles includes the casing assembly as described in claim 4.

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