Tool and method for underwater screw pile construction

Abstract

The invention relates to the technical field of screw pile construction, and provides a tool and method for underwater screw pile construction, the tool for underwater screw pile construction comprises a screw pile and a sleeve, the screw pile comprises a pile body of a cylindrical structure and a screw blade arranged on the circumferential surface of the pile body, the top end of the pile body is covered with a top plate, and the top plate is arranged in the sleeve. The sleeve is of a hollow cylindrical structure, one end of the sleeve is used for being connected with a drilling machine, and the inner wall of the other end of the sleeve is used for being in threaded connection or clamped connection with the side portion of the top plate. Through the structural arrangement, the additionally arranged sleeve is matched with the top plate, a drill bit of the drilling machine is prevented from entering water, the sleeve prolongs the axial distance of torque application of the drilling machine, underwater installation and construction of the screw pile are achieved, the application range of the screw pile is widened, use is convenient and fast, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of screw pile construction, and in particular to a tool and method for underwater screw pile construction. Background Art

[0002] With the rapid development of the economy, a variety of large-scale construction projects are constantly emerging, and the requirements for pile foundation bearing capacity are becoming increasingly stringent. Traditional circular cross-section piles rely primarily on friction between the pile body and the surrounding soil to generate lateral resistance. This single load-bearing method has obvious limitations in bearing capacity, making it difficult to meet the high standards required by modern engineering. As a new type of pile foundation structure, screw piles offer significant advantages due to their unique design. They consist of a central circular shaft and multiple layers of spiral blades. The anchoring effect created by the spiral blades significantly enhances the pile foundation's bearing capacity. During construction, screw piles overcome the many limitations of traditional pile driving techniques. Using a hydraulic torque motor mounted on a crawler vehicle or forklift, the screw piles are driven into the soil using rotary torque, making installation convenient and efficient. Furthermore, this construction method offers low noise and vibration, minimal disturbance to the surrounding soil, and the ability to flexibly install at any angle in confined spaces. Once installed, they can immediately bear loads and are recyclable, highly consistent with the concepts of green building and sustainable development. Consequently, they are widely used in a wide range of applications, including housing construction, transmission towers, retaining walls, renewable energy power generation facilities (such as photovoltaic power plants and wind turbines), submarine pipelines, and offshore oil platforms. However, current screw pile technology faces significant challenges in underwater construction scenarios. In shallow waters, such as shoals and fish ponds, far from shore, screw piles often need to be sunk to the bottom of a pond or river and completely submerged. However, existing pile drilling equipment, particularly hydraulically driven motor drill bits, cannot function properly underwater due to limitations in waterproofing and underwater operating conditions. This technical bottleneck significantly restricts the application of screw piles in underwater engineering, making further expansion difficult. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: how to realize underwater construction of spiral piles.

[0004] The present invention provides a tool for underwater screw pile construction, comprising a screw pile and a sleeve. The screw pile comprises a pile body with a cylindrical structure and spiral blades arranged on the circumferential surface of the pile body. The top cover of the pile body is provided with a top plate. The sleeve is a hollow cylindrical structure. One end of the sleeve is used to be connected to a drilling rig, and the inner wall of the other end of the sleeve is used to be threadedly connected or clamped to the side of the top plate.

[0005] Optionally, the top plate is a circular plate structure, the side of the top plate is provided with an external thread structure, the inner wall of one end of the sleeve is provided with an internal thread structure adapted to the external thread structure, and the top plate and the sleeve are threadedly connected through the external thread structure and the internal thread structure.

[0006] Optionally, a side of the top plate is provided with a clamping edge structure, one end of the sleeve is provided with a clamping groove structure adapted to the shape of the top plate, and the top plate and the sleeve are clamped via the clamping edge structure and the clamping groove structure.

[0007] Optionally, a connecting lug plate is provided on the top plate, and the connecting lug plate is used to connect the pull rod.

[0008] Optionally, a side portion of the top plate protrudes from a circumferential surface of the pile body, and a reinforcing rib is connected between the top plate and the pile body.

[0009] Optionally, the pile body includes a first segment and a second segment, each of which is a steel pipe structure. The bottom end of the first segment is set as a vertebral structure, the top plate is set at the top of the second segment, and the top end of the first segment and the bottom end of the second segment are respectively provided with connecting holes, and the first segment and the second segment are connected to each other through the connecting holes and the connecting piece.

[0010] Optionally, the tooling for underwater screw pile construction further includes a support frame, which is used to be arranged on the bottom of the water, and the support frame is used to support the first segment during the construction process.

[0011] Compared with the prior art, the tooling for underwater screw pile construction provided by the present invention has the following technical effects: The tooling for underwater screw pile construction provided by the present invention can be applied to the installation and construction of underwater screw piles. By setting the screw pile as a cylindrical pile body and the spiral blades arranged on the circumferential surface of the pile body, it is convenient for the screw pile to be screwed downward into the water bottom. At the same time, a top plate is provided on the top cover of the pile body. On the one hand, the top plate can seal the top of the pile body to prevent adverse conditions such as water corrosion. On the other hand, the top plate can be threaded or clamped with the inner wall of the end of the sleeve with a hollow cylindrical structure, and then connected to the drilling rig through the other end of the sleeve, and then the sleeve can be driven to rotate by the drilling rig. The screw pile is then driven to be screwed downward. After the screw pile is screwed into the preset position, if the top plate is threadedly connected to the sleeve, the drill rig can be rotated in the opposite direction to release the connection between the sleeve and the top plate. If the top plate and the sleeve are clamped, the drill rig can be used to drive the sleeve to be pulled up to release the connection between the sleeve and the top plate, thus completing the underwater installation of the screw pile. Through the above-mentioned structural arrangement, the additional sleeve cooperates with the top plate, avoiding the drill bit of the drill rig from going into water, and the sleeve extends the axial distance of the drill rig for applying torque, thereby realizing the underwater installation and construction of the screw pile, expanding the application range of the screw pile, and being convenient and quick to use, thereby improving the construction efficiency.

[0012] In addition, the present invention also provides a method for underwater screw pile construction, using the above-mentioned tooling for underwater screw pile construction, the method comprising the following steps: S1. Fix the drilling rig and determine the construction location; S2, connecting one end of the sleeve of the tooling for underwater screw pile construction to the drill bit of the drilling rig, and threading or clamping the other end of the sleeve to the top plate of the screw pile of the tooling for underwater screw pile construction; S3, controlling the drilling rig to drill, and after the screw pile is screwed into a preset position, rotating the drill bit in the reverse direction or pulling out the sleeve from the top plate to release the connection between the sleeve and the top plate.

[0013] Optionally, in step S1, the drilling rig is installed at the arm end of a floating excavator or the arm end of a long-arm excavator; When the floating dredging machine is used, the floating dredging machine floats on the water surface, and a balancing anchor cable is connected between the floating dredging machine and the shore; When the long arm excavator is used, the long arm excavator is placed on the ground.

[0014] Optionally, in step S2, before the sleeve is connected to the drill bit, the drill bit is connected to the top of the screw pile and drilling is performed. When the top of the screw pile approaches the water surface, the drill bit is disconnected from the top of the screw pile and then connected to the sleeve.

[0015] Compared with the related art, the method for underwater spiral pile construction provided by the present invention adopts the above-mentioned tooling for underwater spiral pile construction, and its technical effects are roughly the same as the technical effects of the above-mentioned tooling for underwater spiral pile construction, which will not be repeated here. At the same time, by fixing the drilling rig and determining the construction position, the spiral pile can be installed and constructed more accurately, improving the construction accuracy and quality. In addition, by connecting one end of the sleeve to the drill bit and threading or clamping the other end of the sleeve to the top plate of the spiral pile, it is convenient to connect and transmit torque through the sleeve, lengthening the drilling distance of the drilling rig and preventing the drill bit from entering underwater. At the same time, after the spiral pile is screwed into the preset position, the drill bit can be rotated in the opposite direction or the sleeve can be pulled out from the top plate to release the connection between the sleeve and the top plate, making the construction convenient and quick, and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a screw pile according to an embodiment of the present invention; Figure 2 This is a schematic structural diagram of a sleeve according to an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the pile top of a screw pile according to an embodiment of the present invention; Figure 4 The structure of the top plate of the embodiment of the present invention is shown as follows Figure 1 ; Figure 5 The structure of the top plate of the embodiment of the present invention is shown as follows Figure 2 ; Figure 6 This is a partial structural diagram of a pile body according to an embodiment of the present invention; Figure 7 Schematic diagram of tooling application for underwater screw pile construction according to an embodiment of the present invention Figure 1 ; Figure 8 Schematic diagram of tooling application for underwater screw pile construction according to an embodiment of the present invention Figure 2 ; Figure 9 This is a flow chart of a method for underwater screw pile construction according to an embodiment of the present invention; Figure 10 This is a schematic diagram of a scenario in which a screw pile is applied to a flexible photovoltaic support according to an embodiment of the present invention; Figure 11 Schematic diagram of the tooling construction process for underwater screw pile construction according to an embodiment of the present invention Figure 1 ; Figure 12 Schematic diagram of the tooling construction process for underwater screw pile construction according to an embodiment of the present invention Figure 2 ; Figure 13 Schematic diagram of the tooling construction process for underwater screw pile construction according to an embodiment of the present invention Figure 3; Figure 14 Schematic diagram of the tooling construction process for underwater screw pile construction according to an embodiment of the present invention Figure 4 .

[0017] Description of reference numerals: 10-screw pile, 11-pile body, 111-first segment, 112-second segment, 113-connecting casing, 12-spiral blade, 13-top plate, 131-connecting ear plate, 14-reinforcement rib, 20-sleeve, 30-drilling rig, 40-pull rod, 50-support frame, 61-floating excavator, 62-long-arm excavator, 70-balancing anchor cable, 01-construction water level, 02-construction bottom, 03-photovoltaic panel, 04-side pile. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be practiced in an order other than that illustrated or described herein.

[0020] In the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections via an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0022] Throughout this specification, references to the terms "embodiment," "one embodiment," and "an implementation" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

[0023] In order to solve the above technical problems, Figures 1 to 7 As shown, an embodiment of the present invention provides a tool for underwater screw pile construction, including a screw pile 10 and a sleeve 20. The screw pile 10 includes a pile body 11 with a cylindrical structure and a spiral blade 12 arranged on the circumferential surface of the pile body 11. The top cover of the pile body 11 is provided with a top plate 13. The sleeve 20 is a hollow cylindrical structure. One end of the sleeve 20 is used to be connected to a drilling rig 30, and the inner wall of the other end of the sleeve 20 is used to be threaded or clamped with the side of the top plate 13.

[0024] It should be noted that if Figure 7 As shown, the drilling rig 30 can be installed at the arm end of the floating excavator 61, or, as shown in FIG. Figure 8 As shown, the drilling rig 30 can also be installed on the arm end of the long-arm excavator 62, and can be used according to the actual construction scene and needs. Specifically, if the construction location where the screw pile 10 is to be installed is far away from the shore, the floating excavator 61 can be used to install the drilling rig 30. If the construction location is close to the shore, the long-arm excavator 62 can be used to install the drilling rig 30. The drill bit of the drilling rig 30 can be connected to a bolt or other connector through the mounting hole opened at the end of the sleeve 20, or it can be connected to the sleeve 20 through a flange structure. No specific limitation is made here, and the design can be adapted according to the type of specific drilling rig 30. At the same time, according to the needs of the construction application scenario, the screw pile 10 can be installed upright on the bottom of the water as a support pile or anchor pile, or it can be installed at an angle as a pull-out anchor pile, such as Figure 10As shown, the spiral pile 10, as an anti-pullout anchor pile for the flexible photovoltaic support, is installed obliquely in the construction water bottom 02 below the construction water level 01, and cooperates with the side pile 04 of the photovoltaic panel 03, and a pull rod 40 is connected to the top of the spiral pile 10 to reinforce and fix the flexible photovoltaic support. Such construction requirements, that is, the spiral pile 10 must be completely immersed below the construction water level 01 and screwed into the construction water bottom 02. Since the drilling rig 30, especially the hydraulic drive motor drill bit, is limited by its waterproof performance and underwater working conditions and cannot operate normally underwater, it is difficult for existing construction tools and equipment to achieve underwater operations. In this embodiment, the additional sleeve 20 cooperates with the top plate 13 to avoid the drilling rig 30 from entering the water. The sleeve 20 extends the axial distance of the drilling rig 30 for applying torque, thereby realizing the underwater installation and construction of the spiral pile 10.

[0025] In this embodiment, the tooling for underwater screw pile construction provided in this embodiment can be applied to the installation and construction of underwater screw piles 10. By setting the screw pile 10 as a cylindrical pile body 11 and a spiral blade 12 arranged on the circumferential surface of the pile body 11, it is convenient for the screw pile 10 to be screwed downward into the water bottom. At the same time, a top plate 13 is provided on the top cover of the pile body 11. On the one hand, the top plate 13 can seal the top of the pile body 11 to prevent adverse conditions such as water corrosion. On the other hand, the top plate 13 can be threaded or clamped with the inner wall of the end of the sleeve 20 with a hollow cylindrical structure, and then connected to the drilling rig 30 through the other end of the sleeve 20, and then the sleeve 20 can be driven to rotate by the drilling rig 30. The sleeve 20 The screw pile 10 is then driven to be screwed downward. After the screw pile 10 is screwed into the preset position, if the top plate 13 is threadedly connected to the sleeve 20, the drill rig 30 can be rotated in the opposite direction to release the connection between the sleeve 20 and the top plate 13; if the top plate 13 is engaged with the sleeve 20, the drill rig 30 can be used to drive the sleeve 20 to be pulled up to release the connection between the sleeve 20 and the top plate 13, thus completing the underwater installation of the screw pile 10. Through the above-mentioned structural arrangement, the additional sleeve 20 cooperates with the top plate 13, avoiding the drill bit of the drill rig 30 from entering the water, and the sleeve 20 extends the axial distance of the torque applied by the drill rig 30, thereby realizing the underwater installation and construction of the screw pile 10, improving the application range of the screw pile 10, and being convenient and quick to use, thereby improving the construction efficiency.

[0026] Alternatively, as Figures 2 to 4 As shown, the top plate 13 is a circular plate structure, the side of the top plate 13 is provided with an external thread structure, the inner wall of one end of the sleeve 20 is provided with an internal thread structure adapted to the external thread structure, and the top plate 13 and the sleeve 20 are threadedly connected through the external thread structure and the internal thread structure.

[0027] Specifically, the side of the top plate 13, that is, the circumferential surface of the top plate 13, the external thread mechanism is opened on the circumferential surface of the top plate 13, the inner diameter of the sleeve 20 is adapted to the diameter of the top plate 13 of the circular plate structure, and the internal thread of the sleeve 20 can be opened with an appropriate height size according to the thickness of the top plate 13 and actual needs. That is, after the top plate 13 is screwed into the sleeve 20 for a distance and reaches the end point of the internal thread structure of the sleeve 20, the top plate 13 stops moving further into the sleeve 20. At this time, the drilling rig 30 can drive the top plate 13 to rotate accordingly after the sleeve 20 is rotated, that is, drive the screw pile 10 to be screwed in for construction, which is easy to use and stable to cooperate with.

[0028] In this embodiment, the top plate 13 is set to a circular plate structure, and an external thread structure is provided on the side of the top plate 13, and an internal thread structure compatible with the external thread structure is provided on the inner wall of one end of the sleeve 20. When in use, the end of the sleeve 20 can be driven by the rotation of the drilling rig 30 to be threadedly connected to the top plate 13, that is, the external thread structure and the internal thread structure are matched to form a threaded connection, thereby driving the screw pile 10 to rotate as a whole and screw into the bottom of the water for construction. After the screw pile 10 is screwed into the preset position, the drilling rig 30 can be used to rotate in the reverse direction to drive the sleeve 20 to rotate in the reverse direction, that is, the threaded connection between the internal thread structure of the sleeve 20 and the external thread structure of the top plate 13 is released, that is, the connection between the sleeve 20 and the screw pile 10 is released, and the installation and construction of the screw pile 10 is completed. The construction is convenient and fast, and the efficiency of the installation and construction of the underwater screw pile 10 is improved.

[0029] Alternatively, as Figure 2 、 Figure 3 and Figure 5 As shown, the side of the top plate 13 is provided with a snap-fit edge structure, and one end of the sleeve 20 is provided with a snap-fit groove structure that matches the shape of the top plate 13. The top plate 13 and the sleeve 20 are snap-fitted via the snap-fit edge structure and the snap-fit groove structure.

[0030] Specifically, the snap-fit edge structure is adapted to the snap-fit groove structure. Once the two are snap-fitted, the top plate 13 can be driven to rotate by the sleeve 20. For example, the top plate 13 is a regular hexagonal structural plate, and each of the hexagonal edge structures is a snap-fit edge structure. Correspondingly, a corresponding snap-fit groove structure is provided in the end of the sleeve 20, that is, a regular hexagonal groove structure. This groove structure is similar to the principle of an Allen wrench. After being aligned and snap-fitted with the top plate 13, the drill rig 30 drives the sleeve 20 to rotate, which in turn drives the screw pile 10 to rotate. After the screw pile 10 is screwed into a preset position, the drill rig 30 drives the sleeve 20 to pull up, so that the sleeve 20 is disengaged from the top plate 13, thereby releasing the connection between the sleeve 20 and the screw pile 10, and thus completing the installation of the screw pile 10.

[0031] It should be understood that the top plate 13 of the regular hexagonal plate structure provided in this embodiment and the regular hexagonal clamping groove structure that matches it are preferred examples of structures that can replace the above-mentioned threaded connection between the top plate 13 and the sleeve 20. The top plate 13 of the regular hexagonal plate structure and the regular hexagonal clamping groove structure that matches it are convenient for processing and production, and are convenient for alignment and clamping, as well as for disconnection, making construction more convenient and quick. At the same time, the top plate 13 can also be in other shapes besides the circular plate shape, as long as its side has a clamping edge structure that can match the clamping groove structure at the end of the sleeve 20, it can be clamped with the top plate 13 by the sleeve 20 and driven by the rotation of the drilling rig 30 to screw in the screw pile 10 for construction. For example, a top plate with a triangular plate structure, a top plate with a quadrilateral plate structure, etc. are all possible, and no specific limitation is made here.

[0032] In this embodiment, a clamping edge structure is provided on the side of the top plate 13, and a clamping groove structure that is adapted to the shape of the top plate 13 is provided at one end of the sleeve 20. When in use, the top plate 13 and the sleeve 20 can be clamped together through the clamping edge structure and the clamping groove structure, and the sleeve 20 can be driven to rotate by rotating the drilling rig 30, thereby driving the screw pile 10 to be screwed in for construction. After the screw pile 10 is screwed into the preset position, the drilling rig 30 drives the sleeve 20 to pull up, so that the clamping groove structure of the sleeve 20 is disengaged from the clamping edge structure of the top plate 13, that is, the connection between the sleeve 20 and the screw pile 10 is released, that is, the installation of the screw pile 10 is completed, and the construction efficiency is further improved.

[0033] Alternatively, as Figure 3 and Figure 10 As shown, a connecting lug plate 131 is provided on the top plate 13 , and the connecting lug plate 131 is used to connect the pull rod 40 .

[0034] It should be noted that the spiral pile 10 installed underwater is mostly used as an anti-pullout anchor pile. Therefore, it is mostly used in conjunction with the pull rod 40, and the end of the pull rod 40 is provided with a connecting ear structure that is compatible with the connecting ear plate 131, and can be connected by connecting parts such as pins or bolts.

[0035] In this embodiment, by providing a connecting ear plate 131 on the top plate 13, the connecting ear plate 131 can be connected to the pull rod 40, thereby improving the adaptability of the screw pile 10, facilitating on-site construction, being easy to use, and expanding the scope of application.

[0036] Alternatively, as Figure 3 As shown, the side of the top plate 13 protrudes from the circumferential surface of the pile body 11 , and a reinforcing rib 14 is connected between the top plate 13 and the pile body 11 .

[0037] Specifically, a plurality of reinforcing ribs 14 are provided, which are spaced and connected between the top plate 13 and the pile body 11 , and can more firmly and stably support and fix the top plate 13 and the pile body 11 , thereby further improving the structural stability.

[0038] In this embodiment, by protruding the side of the top plate 13 beyond the circumferential surface of the pile body 11 and providing a reinforcing rib 14 between the top plate 13 and the pile body 11, the connection stability between the top plate 13 and the pile body 11 is improved. When the top plate 13 is subjected to the torque transmitted by the sleeve 20, the reinforcing rib 14 can share and withstand part of the torque, preventing the top plate 13 from deforming or separating from the pile body 11 and other unstable situations from occurring, thereby improving the firmness and stability between the top plate 13 and the pile body 11, thereby improving the stability of the overall structure and improving the safety of use.

[0039] Alternatively, as Figure 1 and Figure 6 As shown, the pile body 11 includes a first segment 111 and a second segment 112, each of which is a steel pipe structure. The bottom end of the first segment 111 is set as a vertebral structure, and the top plate 13 is set at the top of the second segment 112. The top end of the first segment 111 and the bottom end of the second segment 112 are respectively provided with connecting holes, and the first segment 111 and the second segment 112 are connected to each other through the connecting holes.

[0040] Specifically, the pile body 11 further includes a connecting sleeve 113, the outer diameter of which matches the inner diameters of the first segment 111 and the second segment 112. Accordingly, connecting holes matching the connecting holes are respectively formed at both ends of the connecting sleeve 113. The two ends of the connecting sleeve 113 are respectively inserted into the top end of the first segment 111 and the bottom end of the second segment 112, and bolts are inserted into the connecting holes to connect the connecting sleeve 113 to the second segment 112, and the connecting sleeve 113 to the first segment 111. Preferably, the connecting holes are all threaded holes, and the connecting sleeve 113 is connected to the second segment 112, and the connecting sleeve 113 is connected to the first segment 111, by a one-way bolt, to prevent the connection from loosening and make the connection more firm and stable.

[0041] In this embodiment, by setting the pile body 11 as a first segment 111 and a second segment 112, both of which are steel pipe structures and connected to each other, and setting the bottom end of the first segment 111 to a vertebral structure, it can serve as the pile bottom structure of the spiral pile 10 to facilitate screwing into the bottom of the water. At the same time, the top plate 13 is set at the top of the second segment 112, which can serve as the pile top structure of the spiral pile 10, which is convenient for connecting with the sleeve 20 for construction. In addition, the steel pipe structure reduces the overall weight while ensuring the overall strength, saves costs, and is convenient for opening connection holes in its pipe wall to facilitate quick connection. Through the above-mentioned structural setting, when encountering a construction scenario requiring a spiral pile 10 with a longer axial distance, the spiral pile 10 can be designed and produced in parts, and installed in parts, that is, the first segment 111 is screwed in and installed first, and then the first segment 111 and the second segment 112 are connected, and then the overall screwing construction is carried out. For example, the drilling rig 30 can be first connected to the connecting hole of the first segment 111, for example, by bolting, and then screwing in construction. When the drill bit of the drilling rig 30 is about to reach the water surface, the connection between the drilling rig 30 and the first segment 111 is released, and the second segment 112 is connected to the first stage 111. At the same time, the top end of the sleeve 20 is connected to the drilling rig, and the bottom end of the sleeve 20 is threaded or clamped to the top plate 13, and then drilling is carried out, and the overall screwing in construction is continued, thereby completing the overall screwing in construction of the spiral pile 10 with a longer axial length, which is more convenient to operate and can adapt to more application scenarios.

[0042] Alternatively, as Figure 1 、 Figure 6 、 Figure 11 and Figure 12 As shown, the tooling for underwater screw pile construction further includes a support frame 50 , which is used to be arranged on the bottom of the water, and the support frame 50 is used to support the first segment 111 during the construction process.

[0043] Specifically, the structure of the support frame 50 is a frame structure, which is easy to produce and install, and can be dropped into the water by an excavator. At the same time, the surface where the support frame 50 contacts the first segment 111 can be designed as a slope structure, which can be adapted to the inclined construction angle of the spiral pile 10, further improving the construction accuracy.

[0044] In this embodiment, by setting up a support frame 50, when in use, the support frame 50 can be placed on the bottom of the water in advance according to the construction requirements and the construction location. When the spiral pile 10 is screwed in in sections, the support frame 50 can stably support the first stage 111, preventing the first segment 111 from shaking or deviating from the preset position after being disconnected from the drilling rig, thereby facilitating construction and improving construction accuracy.

[0045] In addition, if Figures 9 to 14As shown, another embodiment of the present invention provides a method for underwater screw pile construction, using the tooling for underwater screw pile construction as described above, the method comprising the following steps: S1, fix the drilling rig 30 and determine the construction location; S2, connecting one end of the sleeve 20 of the tooling for underwater screw pile construction to the drill bit of the drilling rig 30, and threading or clamping the other end of the sleeve 20 to the top plate 13 of the screw pile 10 of the tooling for underwater screw pile construction; S3 , controlling the drilling rig 30 to drill, and after the screw pile 10 is screwed into a preset position, rotating the drill bit in the reverse direction or pulling out the sleeve 20 from the top plate 13 to release the connection between the sleeve 20 and the top plate 13 .

[0046] Specifically, in step S1, the drilling rig 30 is installed at the arm end of the floating excavator 61 or the arm end of the long-arm excavator 62; When the floating dredge 61 is used, the floating dredge 61 floats on the water surface, and a balancing anchor cable 70 is connected between the floating dredge 61 and the shore. By using the floating dredge 61 to install the drilling rig 30, that is, for example, an dredge with a buoyancy box at the bottom can float on the water surface, it is not restricted by the distance between the construction location and the shore, and has a wider application. The floating dredge 61 is fixed by the balancing anchor cable 70, making the construction process more stable and controllable, and further improving the construction accuracy and quality.

[0047] like Figure 8 As shown, when the long-arm excavator 62 is used, the long-arm excavator 62 is placed on the ground. This situation is suitable when the construction location is close to the shore. By placing the long-arm excavator 62 on the ground of the shore and installing the drilling rig 30, the construction process is more stable and reliable.

[0048] Optionally, in step S2, before the sleeve 20 is connected to the drill bit, the drill bit is connected to the pile top of the screw pile 10 and drilling is performed. When the pile top of the screw pile 10 approaches the water surface, the drill bit is disconnected from the pile top of the screw pile 10 and then connected to the sleeve 20.

[0049] In this way, it can be applied to the installation of screw piles 10 with a longer axial distance, reducing the axial distance of drilling by the drilling rig 30, and making the construction process more stable and reliable. At the same time, it can also be applied to screw piles 10 with a segmented structure. That is, when the construction requires a longer screw pile 10, the screw pile 10 with a segmented structure can be designed and produced in advance, and the segmented screwing construction can be carried out. At this time, the drill bit of the drilling rig 30 can be connected to the screw pile 10 first. Finally, when the pile top of the screw pile 10 is close to the water surface, that is, when the drill bit is about to touch the water, the sleeve 20 is used as an intermediate component for torque transmission to be connected between the pile top of the screw pile 10 and the drill bit, thereby preventing the drilling rig 30 from entering the water and improving the construction efficiency.

[0050] In this embodiment, the method for underwater screw pile construction provided by this embodiment adopts the above-mentioned tooling for underwater screw pile construction, and its technical effects are roughly the same as the technical effects of the above-mentioned tooling for underwater screw pile construction, which will not be repeated here. At the same time, by fixing the drilling rig 30 and determining the construction position, the screw pile 10 can be installed and constructed more accurately, thereby improving the construction accuracy and quality. In addition, by connecting one end of the sleeve 20 to the drill bit and threading or clamping the other end of the sleeve 20 to the top plate 13 of the screw pile 10, it is convenient to connect and transmit torque through the sleeve 20, thereby lengthening the drilling distance of the drilling rig 30 and preventing the drill bit from entering underwater. At the same time, after the screw pile 10 is screwed into the preset position, the drill bit can be rotated in the opposite direction or the sleeve 20 can be pulled out from the top plate 13 to release the connection between the sleeve 20 and the top plate 13, making the construction convenient and fast, and improving the construction efficiency.

[0051] For example, Figure 10 As shown, for example, a screw pile 10 is installed as an anti-pullout anchor pile for a flexible photovoltaic rack. The screw pile 10 needs to be installed at an angle in the construction water bottom 02 below the construction water level 01, and cooperates with the side piles 04 of the photovoltaic panel 03. A tie rod 40 is connected to the top of the screw pile 10 to reinforce and secure the flexible photovoltaic rack. This type of construction requirement can be achieved through the following method.

[0052] Step 1: like Figure 11 As shown, before the construction of the spiral pile 10, the construction area is marked strictly in accordance with the design requirements, and the underwater elevation of the area is measured; the position of the spiral pile 10 is staked out strictly in accordance with the design, and a support frame 50 is set as a construction support and angle guide according to the design angle of the spiral pile 10; the floating dredge 61 serves as the installation carrier and power equipment of the drilling rig 30. In order to ensure that the position remains unchanged during the construction process, a temporary ground anchor can be set on the shore ground. The ground anchor and the floating dredge 61 can be fixed in plane position by a cross-shaped balance anchor cable 70.

[0053] Step 2: like Figure 12 As shown, in the manufacturing site of the screw pile 10, the pile body 11 is processed in sections according to the actual needs of the site, that is, it is processed into, for example, Figure 6 The first segment 111 and the second segment 112 shown are connected by one-way bolts at the processed joints to ensure a secure connection during on-site construction. After the first segment 111 is precisely positioned according to the designed position, drilling is carried out along the support frame 50, and drilling is stopped when the spiral pile 10 and the drilling rig 30 are close to the construction water level 01. The position change of the support frame 50 is checked to ensure that the guide angle meets the design requirements. Then, the connection between the rotary drill bit and the spiral pile 10 is released, and the spiral pile 10 is positioned and supported by the support frame 50.

[0054] Step 3: like Figure 13 As shown, the second section 112 of the screw pile 10 is lifted by the floating excavator 61, and the first section 111 and the second section 112 are connected on the water surface by a one-way bolt; the angle of the drilling rig 30 is adjusted, and the screw pile 10 is drilled along the support frame 50. When the pile top of the second section 112 and the drilling rig 30 are close to the construction water level, the drilling is stopped and the sleeve 20 is prepared for installation. Before installing the sleeve 20, the connection and sealing of the top plate 13 of the screw pile 10 are checked, and the pull rod 40 is installed simultaneously; at this time, it should be noted that the pull rod 40 can be inserted into the sleeve 20 and connected to the The connecting ear plate 131 on the top plate 13 is connected. At this time, the length of the pull rod 40 is less than the length of the sleeve 20, that is, it does not affect the connection between the sleeve 20 and the drilling rig 30. After the pull rod 40 is reliably connected to the top plate 13 and the inspection is completed, the matching sleeve 20 is connected. The connection can be carried out by threaded connection or clamping, so as to facilitate the subsequent removal of the sleeve 20; after the reliable connection, the drilling operation is started. When the drilling is close to the design elevation, the rotation speed is appropriately adjusted to ensure that the connecting ear plate 131 and the pull rod 40 are coplanar to ensure the force stability of the pull rod 40.

[0055] Step 4: After the second section 112, that is, the integral screw pile 10 is drilled to the designed position as required, the connection between the sleeve 20 and the screw pile 10 is released, and the pull rod is led out of the water surface and temporarily fixed, for example, by connecting the pull rod 40 to the next pull rod 40 through a connecting ear or connector, and temporarily fixed to the side pile 04 of the flexible photovoltaic support, and the floating excavator 61 is moved to another position; the construction of the remaining screw piles 10 is completed in sequence according to steps one to four.

[0056] When the screw pile 10 is used as an underwater pull-out resistant anchor pile for a flexible photovoltaic support, the above-mentioned construction method not only realizes the quick underwater construction of the screw pile 10 , but also ensures the construction quality and efficiency.

[0057] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A tool for underwater screw pile construction, characterized in that: The invention comprises a screw pile (10) and a sleeve (20), wherein the screw pile (10) comprises a pile body (11) of a cylindrical structure and a spiral blade (12) arranged on the circumferential surface of the pile body (11), the top end cover of the pile body (11) is provided with a top plate (13), and the sleeve (20) is a hollow cylindrical structure, one end of the sleeve (20) is used for connecting with a drilling rig (30), and the inner wall of the other end of the sleeve (20) is used for threaded connection or clamping with the side of the top plate (13).

2. The tooling for underwater screw pile construction according to claim 1, characterized in that: The top plate (13) is a circular plate structure, a side portion of the top plate (13) is provided with an external thread structure, an inner wall of one end of the sleeve (20) is provided with an internal thread structure that matches the external thread structure, and the top plate (13) and the sleeve (20) are threadedly connected via the external thread structure and the internal thread structure.

3. The tooling for underwater screw pile construction according to claim 1, characterized in that: A clamping edge structure is provided on the side of the top plate (13), and a clamping groove structure that matches the shape of the top plate (13) is provided on one end of the sleeve (20). The top plate (13) and the sleeve (20) are clamped together via the clamping edge structure and the clamping groove structure.

4. The tooling for underwater screw pile construction according to claim 1, characterized in that: A connecting lug plate (131) is provided on the top plate (13), and the connecting lug plate (131) is used to connect the pull rod (40).

5. The tooling for underwater screw pile construction according to claim 1, characterized in that: The side of the top plate (13) protrudes from the circumferential surface of the pile body (11), and a reinforcing rib (14) is connected between the top plate (13) and the pile body (11).

6. The tooling for underwater screw pile construction according to claim 1, characterized in that: The pile body (11) comprises a first segment (111) and a second segment (112), each of which is a steel pipe structure. The bottom end of the first segment (111) is set as a vertebral structure, and the top plate (13) is set at the top end of the second segment (112). The top end of the first segment (111) and the bottom end of the second segment (112) are respectively provided with connecting holes, and the first segment (111) and the second segment (112) are connected to each other through the connecting holes and the connecting piece.

7. The tooling for underwater screw pile construction according to claim 6, characterized in that: The tooling for underwater screw pile construction further comprises a support frame (50), wherein the support frame (50) is used to be arranged on the bottom of the water, and the support frame (50) is used to support the first segment (111) during the construction process.

8. A method for underwater screw pile construction, characterized in that: Using the tooling for underwater screw pile construction according to any one of claims 1 to 7, the method comprises the following steps: S1, fix the drilling rig (30) and determine the construction location; S2, connecting one end of the sleeve (20) of the tooling for underwater screw pile construction to the drill bit of the drilling rig (30), and threading or clamping the other end of the sleeve (20) to the top plate (13) of the screw pile (10) of the tooling for underwater screw pile construction; S3, controlling the drilling rig (30) to drill, and after the screw pile (10) is screwed into a preset position, rotating the drill bit in the opposite direction or pulling out the sleeve (20) from the top plate (13) to release the connection between the sleeve (20) and the top plate (13).

9. The method for underwater screw pile construction according to claim 8, characterized in that: In step S1, the drilling rig (30) is installed at the arm end of a floating excavator (61) or the arm end of a long-arm excavator (62); When the floating dredging machine (61) is used, the floating dredging machine (61) floats on the water surface, and a balancing anchor cable (70) is connected between the floating dredging machine (61) and the shore; When the long-arm excavator (62) is used, the long-arm excavator (62) is placed on the ground.

10. The method for underwater screw pile construction according to claim 8, characterized in that: In step S2, before the sleeve (20) is connected to the drill bit, the drill bit is connected to the pile top of the screw pile (10) and drilling is performed. When the pile top of the screw pile (10) approaches the water surface, the drill bit is disconnected from the pile top of the screw pile (10) and then connected to the sleeve (20).

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