A tool and method for underwater screw pile construction

Abstract

The application relates to the technical field of screw pile construction, and provides a tool and a 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 in a cylindrical structure and a spiral blade arranged on the circumferential surface of the pile body. The top end of the pile body is provided with a top plate. The sleeve is a hollow cylindrical structure. One end of the sleeve is used for being connected with a drilling machine. The inner wall of the other end of the sleeve is used for being threadedly connected or clamped with the side of the top plate. Through the structure, the added sleeve is matched with the top plate, the drill bit of the drilling machine is prevented from being put into water, the sleeve prolongs the axial distance of the torque applied by the drilling machine, the underwater installation construction of the screw pile is realized, the application range of the screw pile is improved, the tool is convenient and fast to use, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of helical pile construction technology, and more specifically, to a tooling and method for underwater helical pile construction. Background Technology

[0002] With rapid economic development, various large-scale engineering construction projects are emerging one after another, and the requirements for the bearing capacity of pile foundations are becoming increasingly stringent. Traditional circular cross-section piles mainly rely on the friction between the pile body and the surrounding soil to generate lateral resistance. This single bearing method makes its bearing performance significantly limited and difficult to meet the high standards required by modern engineering. As a novel type of pile foundation structure, the helical pile exhibits significant advantages due to its unique design. It consists of a central circular shaft and multiple layers of helical blades, the anchoring effect of which greatly enhances the bearing capacity of the pile foundation. During construction, the helical pile overcomes many limitations of traditional pile driving techniques. Using a hydraulic torque motor mounted on a tracked vehicle or forklift, the helical pile is driven into the soil by rotational torque, offering convenient and efficient installation. Furthermore, this construction method features low noise and vibration, minimal disturbance to the surrounding soil, and can be flexibly installed at any angle in confined spaces. It can bear load immediately after installation and is recyclable, highly aligning with green building and sustainable development concepts. Therefore, it is widely used in numerous fields, including residential construction, power transmission towers, retaining walls, new energy power generation facilities (such as photovoltaic power stations and wind turbine towers), as well as submarine pipelines and offshore oil platforms. However, current helical pile technology faces severe challenges in underwater construction scenarios. In shallow waters and fishponds far from the shore, helical piles often need to be sunk to the bottom of the pond or river and completely submerged below the water surface. However, existing drilling equipment, especially hydraulically driven motor drill bits, is limited by waterproofing performance and underwater operating conditions, making it impossible to operate normally underwater. This technical bottleneck greatly restricts the application expansion of helical piles in the field of underwater engineering, making it difficult to further expand their application scope. Summary of the Invention

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

[0004] This invention provides a tooling for underwater helical pile construction, including a helical pile and a sleeve. The helical pile includes a cylindrical pile body and helical blades disposed on the circumferential surface of the pile body. A top plate is provided at the top of the pile body. The sleeve is a hollow cylindrical structure. One end of the sleeve is used to connect with a drilling rig, and the inner wall of the other end of the sleeve is used to be threaded or snapped with the side of the top plate.

[0005] Optionally, the top plate is a circular plate structure, and 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 that is compatible with the external thread structure. The top plate and the sleeve are threadedly connected through the external thread structure and the internal thread structure.

[0006] Optionally, the top plate is provided with a snap-fit ​​edge structure on its side, and one end of the sleeve is provided with a snap-fit ​​groove structure that matches the shape of the top plate. The top plate and the sleeve are snapped together by the snap-fit ​​edge structure and the snap-fit ​​groove structure.

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

[0008] Optionally, the side of the top plate protrudes beyond the 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, which are steel pipe structures respectively. The bottom end of the first segment is set as a cone structure, and the top plate is set at the top end of the second segment. The top end of the first segment and the bottom end of the second segment are respectively provided with connecting holes. The first segment and the second segment are connected to each other with connectors through the connecting holes.

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

[0011] Compared with the prior art, the tooling for underwater helical pile construction provided by the present invention has the following technical advantages: The tooling provided by this invention for underwater helical pile construction can be applied to the installation and construction of underwater helical piles. By setting the helical pile as a cylindrical pile body and helical blades set on the circumferential surface of the pile body, it is easy for the helical pile to be screwed downwards into the water. At the same time, by covering the top of the pile body with a top plate, on the one hand, the top plate can seal the top of the pile body to prevent water ingress and corrosion, and on the other hand, the top plate can be threaded or clamped to the inner wall of the end of the hollow cylindrical sleeve. Then, the other end of the sleeve is connected to the drilling rig, and the drilling rig can drive the sleeve to rotate. The helical pile is then driven downwards. After the helical pile is driven to the preset position, if the top plate and the sleeve are threadedly connected, the connection between the sleeve and the top plate can be released by rotating the drilling rig in the opposite direction; if the top plate and the sleeve are stuck, the connection between the sleeve and the top plate can be released by pulling the sleeve upwards with the drilling rig. This completes the underwater installation of the helical pile. Through the above structural settings, the added sleeve and the top plate cooperate to avoid the drill bit of the drilling rig from going underwater. The sleeve extends the axial distance of the drill rig's applied torque, realizing the underwater installation of the helical pile, improving the application range of the helical pile, and making it convenient and quick to use, thus improving construction efficiency.

[0012] In addition, the present invention also provides a method for underwater helical pile construction, using the above-mentioned tooling for underwater helical pile construction, the method comprising the following steps: S1. Fix the drilling rig and determine the construction location; S2. Connect one end of the sleeve of the tooling for underwater helical pile construction to the drill bit of the drilling rig, and thread or snap the other end of the sleeve to the top plate of the helical pile of the tooling for underwater helical pile construction. S3. Control the drilling rig to drill. After the helical pile has been rotated to the preset position, rotate the drill bit in the opposite direction or pull the sleeve out of the top plate to disconnect the sleeve from the top plate.

[0013] Optionally, in step S1, the drilling rig is installed at the boom end of a floating excavator or the boom 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, it 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 helical pile and drilling is performed. When the top of the helical pile is close to the water surface, the connection between the drill bit and the top of the helical pile is released and then connected to the sleeve.

[0015] Compared with related technologies, the method for underwater helical pile construction provided by this invention, by adopting the aforementioned tooling for underwater helical pile construction, achieves roughly the same technical effects as the aforementioned tooling, which will not be elaborated further here. Simultaneously, by fixing the drilling rig and determining the construction position, the helical pile can be installed more precisely, improving construction accuracy and quality. Furthermore, by connecting one end of the sleeve to the drill bit and the other end of the sleeve to the top plate of the helical pile via threaded connection or clamping, the connection is convenient, and torque is transmitted through the sleeve, extending the drilling distance of the drilling rig and preventing the drill bit from entering the water. Moreover, after the helical pile is screwed into the preset position, the connection between the sleeve and the top plate can be released by reversing the drill bit or pulling the sleeve out from the top plate, making construction convenient and quick, and improving construction efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the helical pile structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the sleeve structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the pile top structure of a spiral pile according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the top plate structure in an embodiment of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the top plate structure in an embodiment of the present invention. Figure 2 ; Figure 6 This is a partial structural diagram of the pile body according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the tooling application for underwater helical pile construction according to an embodiment of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the tooling application for underwater helical pile construction according to an embodiment of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the method for underwater helical pile construction according to an embodiment of the present invention; Figure 10 This is a schematic diagram illustrating the application of helical piles in flexible photovoltaic supports according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the tooling construction process for underwater helical pile construction according to an embodiment of the present invention. Figure 1 ; Figure 12 This is a schematic diagram of the tooling construction process for underwater helical pile construction according to an embodiment of the present invention. Figure 2 ; Figure 13 This is a schematic diagram of the tooling construction process for underwater helical pile construction according to an embodiment of the present invention. Figure 3; Figure 14 This is a schematic diagram of the tooling construction process for underwater helical pile construction according to an embodiment of the present invention. Figure 4 .

[0017] Explanation of reference numerals in the attached figures: 10-Helical pile, 11-Pile body, 111-First segment, 112-Second segment, 113-Connecting sleeve, 12-Helical blade, 13-Top plate, 131-Connecting ear plate, 14-Reinforcing rib plate, 20-Sleeve, 30-Drilling rig, 40-Tie rod, 50-Support frame, 61-Floating excavator, 62-Long-arm excavator, 70-Balance anchor cable, 01-Construction water level, 02-Construction seabed, 03-Photovoltaic panel, 04-Side pile. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0020] In the description of this invention, the orientations or positional relationships indicated by terms such as "up," "down," "left," "right," "top," "bottom," "front," "back," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this invention. They are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 mechanical 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.

[0022] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative implementation of the present invention. In this specification, the illustrative expressions of the above 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 one or more embodiments or implementations.

[0023] To solve the above technical problems, such as Figures 1 to 7 As shown, this embodiment of the invention provides a tooling for underwater helical pile construction, including a helical pile 10 and a sleeve 20. The helical pile 10 includes a cylindrical pile body 11 and helical blades 12 disposed on the circumferential surface of the pile body 11. A top plate 13 is provided at the top of the pile body 11. The sleeve 20 is a hollow cylindrical structure. One end of the sleeve 20 is used to connect with a drilling rig 30, and the inner wall of the other end of the sleeve 20 is used to be threaded or snapped with the side of the top plate 13.

[0024] It should be noted that, as Figure 7 As shown, the drilling rig 30 can be mounted on the boom end of the floating dredger 61, or, as... Figure 8 As shown, the drilling rig 30 can also be installed on the boom end of the long-arm excavator 62, depending on the actual construction scenario and requirements. Specifically, if the construction location where the helical pile 10 needs to be installed is far from the shore, the floating dredger 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 the sleeve 20 via mounting holes and bolts or other connecting parts, or via a flange structure. No specific limitation is made here; the design can be adapted according to the type of drilling rig 30. Furthermore, depending on the construction application scenario, the helical pile 10 can be installed vertically on the seabed as a support pile or anchor pile, or installed at an angle as an anti-pull-out anchor pile, such as... Figure 10As shown, the helical pile 10 serves as an anti-pull-out anchor for the flexible photovoltaic support. It is 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 helical pile 10 to reinforce and fix the flexible photovoltaic support. Such construction requirements, where the helical pile 10 needs to be completely submerged below the construction water level 01 and screwed into the construction water bottom 02, are difficult to implement underwater due to the limitations of the drilling rig 30, especially the hydraulically driven drill bit, which cannot operate normally underwater due to waterproofing limitations and underwater working conditions. Therefore, existing construction tools and equipment are insufficient for underwater operations. In this embodiment, by adding a sleeve 20 that cooperates with the top plate 13, the drilling rig 30 is prevented from entering the water. The sleeve 20 extends the axial distance for applying torque with the drilling rig 30, enabling the underwater installation of the helical pile 10.

[0025] In this embodiment, the tooling provided for underwater helical pile construction can be applied to the installation of underwater helical piles 10. By setting the helical pile 10 as a cylindrical pile body 11 and helical blades 12 disposed on the circumferential surface of the pile body 11, it is easy for the helical pile 10 to spiral downwards into the water. At the same time, by covering the top of the pile body 11 with a top plate 13, on the one hand, the top plate 13 can seal the top of the pile body 11 to prevent water ingress and corrosion, and on the other hand, the top plate 13 can be threaded or snapped to the inner wall of the end of the hollow cylindrical sleeve 20. Then, the other end of the sleeve 20 is connected to the drilling rig 30, so that the drilling rig 30 can drive the sleeve 20 to rotate. Then, the helical pile 10 is driven downwards. After the helical pile 10 is driven to the preset position, if the top plate 13 is threadedly connected to the sleeve 20, the connection between the sleeve 20 and the top plate 13 can be released by rotating the drilling rig 30 in the opposite direction. If the top plate 13 and the sleeve 20 are stuck together, the connection between the sleeve 20 and the top plate 13 can be released by pulling the sleeve 20 upwards through the drilling rig 30. This completes the underwater installation of the helical pile 10. Through the above structural settings, the added sleeve 20 cooperates with the top plate 13, avoiding the drill bit of the drilling rig 30 from going underwater. The sleeve 20 extends the axial distance of the applied torque of the drilling rig 30, realizing the underwater installation of the helical pile 10, improving the application range of the helical pile 10, and making it convenient and quick to use, thus improving construction efficiency.

[0026] Optionally, such as Figures 2 to 4 As shown, the top plate 13 is a circular plate structure, and 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 that is compatible with the external thread structure. The top plate 13 and the sleeve 20 are threadedly connected through the external thread structure and the internal thread structure.

[0027] Specifically, the external thread mechanism is formed on the side of the top plate 13, that is, 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. The internal thread of the sleeve 20 can be set with an appropriate height according to the thickness of the top plate 13 and the actual needs. That is, after the top plate 13 is screwed into the sleeve 20 for a certain distance, it reaches the end point of the internal thread structure of the sleeve 20, and then the top plate 13 stops moving into the sleeve 20. At this time, the drilling rig 30 can drive the top plate 13 to rotate after the sleeve 20 rotates, that is, drive the spiral pile 10 to perform spiral construction. It is convenient to use and the operation is stable.

[0028] In this embodiment, the top plate 13 is configured as a circular plate structure, and an external thread structure is provided on the side of the top plate 13. An internal thread structure that matches the external thread structure is provided on the inner wall of one end of the sleeve 20. In use, the end of the sleeve 20 can be driven by the rotation of the drilling rig 30 to align and thread with the top plate 13. That is, the external thread structure and the internal thread structure are used to form a threaded connection, which can drive the spiral pile 10 to rotate and enter the seabed for construction. After the spiral pile 10 is screwed into the preset position, the reverse rotation of the drilling rig 30 can drive the sleeve 20 to rotate in the opposite direction, which means that 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 spiral pile 10 is released, thus completing the installation of the spiral pile 10. The construction is convenient and quick, improving the efficiency of the installation of the underwater spiral pile 10.

[0029] Optionally, such as Figure 2 , Figure 3 and Figure 5 As shown, the top plate 13 has a snap-fit ​​edge structure on its side, and one end of the sleeve 20 has a snap-fit ​​groove structure that matches the shape of the top plate 13. The top plate 13 and the sleeve 20 are snapped together by the snap-fit ​​edge structure and the snap-fit ​​groove structure.

[0030] Specifically, the snap-fit ​​edge structure and the snap-fit ​​groove structure are compatible. Once they are snapped together, the top plate 13 can be rotated via the sleeve 20. For example, the top plate 13 is a regular hexagonal structure, with each side of the hexagon being a snap-fit ​​edge structure. Correspondingly, the end of the sleeve 20 has a corresponding snap-fit ​​groove structure, which is a regular hexagonal groove structure. This groove structure is similar to the principle of an Allen wrench. After being aligned and snapped together with the top plate 13, the drilling rig 30 rotates the sleeve 20, which in turn rotates the auger pile 10. Once the auger pile 10 has been rotated to the preset position, the drilling rig 30 pulls the sleeve 20 upwards, disengaging the sleeve 20 from the top plate 13, thus releasing the connection between the sleeve 20 and the auger pile 10, and completing the installation of the auger pile 10.

[0031] It should be understood that the hexagonal plate structure top plate 13 and the matching hexagonal snap-fit ​​groove structure provided in this embodiment are preferred examples that can replace the above-mentioned structure of threaded connection between the top plate 13 and the sleeve 20. The hexagonal plate structure top plate 13 and the matching hexagonal snap-fit ​​groove structure are easy to process and produce, easy to align and snap-fit, and easy to disconnect, making construction more convenient and faster. At the same time, the top plate 13 can also be any shape other than a circular plate, as long as its side has a snap-fit ​​edge structure that can cooperate with the snap-fit ​​groove structure at the end of the sleeve 20. It can be constructed by snapping the sleeve 20 with the top plate 13 and rotating the drilling rig 30 to drive the spiral pile 10 to advance. For example, a triangular plate structure top plate or a quadrilateral plate structure top plate are all acceptable, and no specific limitation is made here.

[0032] In this embodiment, by setting a snap-fit ​​edge structure on the side of the top plate 13 and a snap-fit ​​groove structure that matches the shape of the top plate 13 at one end of the sleeve 20, the top plate 13 and the sleeve 20 can be snapped together through the snap-fit ​​edge structure and the snap-fit ​​groove structure during use. The sleeve 20 can then be rotated by the rotation of the drilling rig 30, thereby driving the spiral pile 10 to advance. After the spiral pile 10 has advanced to the preset position, the drilling rig 30 drives the sleeve 20 to be pulled upward, causing the snap-fit ​​groove structure of the sleeve 20 to disengage from the snap-fit ​​edge structure of the top plate 13, thus releasing the connection between the sleeve 20 and the spiral pile 10. This completes the installation of the spiral pile 10 and further improves construction efficiency.

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

[0034] It should be noted that the helical pile 10 installed underwater is mostly used as an anti-pull-out anchor pile. Therefore, it is often used in conjunction with the tie rod 40. Furthermore, the end of the tie 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 tie rod 40, which improves the adaptability of the spiral pile 10, facilitates on-site construction, is easy to use, and expands the application range.

[0036] Optionally, such 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 plate 14 is connected between the top plate 13 and the pile body 11.

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

[0038] In this embodiment, by having the side of the top plate 13 protrude beyond the circumferential surface of the pile body 11, and by 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 bear part of the torque, preventing the top plate 13 from deforming or separating from the pile body 11, thus improving the firmness and stability between the top plate 13 and the pile body 11, thereby improving the overall structural stability and enhancing the safety of use.

[0039] Optionally, such as Figure 1 and Figure 6 As shown, the pile body 11 includes a first segment 111 and a second segment 112, which are steel pipe structures respectively. The bottom end of the first segment 111 is set as a cone 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. The first segment 111 and the second segment 112 are connected to each other with connecting parts through the connecting holes.

[0040] Specifically, the pile body 11 further includes a connecting sleeve 113. The outer diameter of the connecting sleeve 113 is adapted to the inner diameter of the first segment 111 and the second segment 112. Correspondingly, both ends of the connecting sleeve 113 are respectively provided with connecting holes adapted to the connecting holes. 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. The connecting sleeve 113 is connected to the second segment 112 and the connecting sleeve 113 is connected to the first segment 111 by bolts inserted into the connecting holes. Preferably, all the connecting holes are 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 one-way bolts to prevent loosening and make the connection more secure and stable.

[0041] In this embodiment, the pile body 11 is configured as a first segment 111 and a second segment 112, both of which are steel pipe structures and interconnected. The bottom end of the first segment 111 is configured as a cone structure, which can serve as the pile bottom structure of the helical pile 10 for easy screwing into 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 helical pile 10 for easy connection with the sleeve 20 during construction. Furthermore, the steel pipe structure reduces the overall weight and saves costs while ensuring overall strength, and it is convenient to open connection holes in its pipe wall for quick connection. With the above structural configuration, when encountering construction scenarios that require a long axial distance for the helical pile 10, the helical pile 10 can be designed, manufactured, and installed separately. 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 before the overall screwing construction is carried out. For example, the drilling rig 30 can be connected to the connecting hole of the first segment 111 firstly, for example, by bolting, and then the drilling can be carried out. 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 segment 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. Then drilling is carried out again, and the overall drilling can be continued, thereby completing the overall drilling of the helical pile 10 with a long axial length. This is more convenient to operate and can be adapted to more application scenarios.

[0042] Optionally, such as Figure 1 , Figure 6 , Figure 11 and Figure 12 As shown, the tooling for underwater helical pile construction also includes a support frame 50, which is used to be set on the bottom of the water and to support the first segment 111 during construction.

[0043] Specifically, the support frame 50 has a frame structure, which is convenient for production and installation. It can be dropped into water by an excavator. At the same time, the surface of the support frame 50 that contacts the first segment 111 can be designed as an inclined structure, which can be adapted to the inclined construction angle of the helical pile 10, further improving the construction accuracy.

[0044] In this embodiment, by setting up a support frame 50, the support frame 50 can be placed underwater in advance according to the construction requirements and construction location. When the spiral pile 10 is being drilled in segments, 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. This facilitates construction and improves construction accuracy.

[0045] In addition, such as Figures 9 to 14As shown, another embodiment of the present invention provides a method for underwater helical pile construction, employing the tooling for underwater helical pile construction as described above, the method comprising the following steps: S1. Fix the drilling rig at 30mm and determine the construction location; S2. Connect one end of the sleeve 20 of the tooling for underwater helical pile construction to the drill bit of the drilling rig 30, and thread or snap the other end of the sleeve 20 to the top plate 13 of the helical pile 10 of the tooling for underwater helical pile construction. S3. Control the drilling rig 30 to drill. After the spiral pile 10 is screwed into the preset position, rotate the drill bit in the opposite direction or pull out the sleeve 20 from the top plate 13 to disconnect the sleeve 20 from the top plate 13.

[0046] Specifically, in step S1, the drilling rig 30 is installed at the boom end of the floating excavator 61 or the boom end of the long-arm excavator 62. When the floating excavator 61 is used, it floats on the water surface and is connected to the shore by a balancing anchor cable 70. By using the floating excavator 61 to install the drilling rig 30, that is, an excavator with a pontoon at the bottom, it can float on the water surface and is not limited by the distance of the construction location from the shore, making its application more widespread. The balancing anchor cable 70 fixes the floating excavator 61, 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 on the shore and installing the drilling rig 30, the construction process becomes 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 top of the spiral pile 10 and drilling is performed. When the top of the spiral pile 10 is close to the water surface, the connection between the drill bit and the top of the spiral pile 10 is released and then the drill bit is connected to the sleeve 20.

[0049] This design is suitable for installing helical piles 10 with long axial distances, reducing the axial distance of drilling by the drilling rig 30 and making the construction process more stable and reliable. It is also suitable for segmented helical piles 10. That is, when the construction requires a long helical pile 10, segmented helical piles 10 can be designed and manufactured in advance and segmented drilling can be carried out. In this case, the drill bit of the drilling rig 30 can be connected to the helical pile 10 first. Finally, when the top of the helical pile 10 is close to the water surface, that is, when the drill bit is about to contact the water, the sleeve 20 is used as an intermediate component for torque transmission to connect between the top of the helical pile 10 and the drill bit, preventing the drilling rig 30 from entering the water and improving construction efficiency.

[0050] In this embodiment, the method for underwater helical pile construction provided in this embodiment, by adopting the aforementioned tooling for underwater helical pile construction, has roughly the same technical effects as the aforementioned tooling for underwater helical pile construction, and will not be repeated here. Simultaneously, by fixing the drilling rig 30 and determining the construction position, the helical pile 10 can be installed more precisely, improving construction accuracy and quality. Furthermore, 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 helical pile 10, the connection is convenient, and torque is transmitted through the sleeve 20, extending the drilling distance of the drilling rig 30 and preventing the drill bit from entering the water. At the same time, after the helical pile 10 is screwed into the preset position, the connection between the sleeve 20 and the top plate 13 can be released by reversing the drill bit or pulling the sleeve 20 out of the top plate 13, making construction convenient and quick, and improving construction efficiency.

[0051] For example, such as Figure 10 As shown, taking the installation of helical piles 10 as anti-pull-out anchors for flexible photovoltaic supports as an example, the helical piles 10 need to be installed at an angle in the construction water bottom 02 below the construction water level 01, and cooperate with the side piles 04 of the photovoltaic panel 03, and a tie rod 40 is connected to the top of the helical piles 10 to reinforce and fix the flexible photovoltaic support. Such construction requirements can be achieved through the following methods.

[0052] Step 1: like Figure 11 As shown, before the construction of the helical pile 10, the construction area is marked in strict accordance with the design requirements, and the bottom elevation of the area is measured. The position of the helical pile 10 is laid out in strict accordance with the design, and the support frame 50 is set up as construction support and angle guide according to the design angle of the helical pile 10. The floating dredger 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, temporary ground anchors can be set up on the shore. The ground anchors and the floating dredger 61 can be fixed in planar position by the cross-shaped balance anchor cable 70.

[0053] Step Two: like Figure 12 As shown, in the manufacturing plant of the helical pile 10, the pile body 11 is processed into sections according to the actual needs of the site, that is, processed into, for example... Figure 6 The first segment 111 and the second segment 112 shown are connected by one-way bolts to ensure a secure connection during on-site construction. After the first segment 111 is precisely positioned according to the design position, drilling is carried out along the support frame 50. Drilling is stopped when the helical pile 10 and the drilling rig 30 are close to the construction water level 01. The position 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 helical pile 10 is disconnected, and the helical pile 10 is positioned and supported by the support frame 50.

[0054] Step 3: like Figure 13 As shown, the second segment 112 of the helical pile 10 is lifted by the floating dredging machine 61, and the first segment 111 and the second segment 112 are connected on the water surface by one-way bolts; the angle of the drilling rig 30 is adjusted, and the helical pile 10 is drilled along the support frame 50. When the top of the second segment 112 is close to the construction water level of the drilling rig 30, drilling is stopped and preparations are made to install the sleeve 20. Before installing the sleeve 20, the connection and sealing of the top plate 13 of the helical pile 10 are checked, and the tie rod 40 is installed simultaneously; at this time, it should be noted that the tie rod 40 can be inserted into the sleeve 20 and connected to the helical pile 10. The connecting lug 131 on the top plate 13 is connected. At this time, the length of the tie rod 40 is less than the length of the sleeve 20, which means that it does not affect the connection between the sleeve 20 and the drilling rig 30. After the tie 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 made by threaded connection or snap-fit, so that the sleeve 20 can be removed later. After the reliable connection, the drilling operation is started. When drilling is close to the design elevation, the speed is adjusted appropriately to ensure that the connecting lug 131 and the tie rod 40 are coplanar, so as to ensure the stress stability of the tie rod 40.

[0055] Step Four: After the second segment 112, that is, the integral helical pile 10, is drilled to the design position as required, the connection between the sleeve 20 and the helical pile 10 is released. At the same time, the tie rod is led out of the water and temporarily fixed, for example, by connecting the tie rod 40 to the next tie rod 40 through connecting lugs or connectors, and temporarily fixed to the side pile 04 of the flexible photovoltaic support. The floating excavator 61 is then moved to another position. The construction of the remaining helical piles 10 is completed in sequence according to steps one to four.

[0056] When using the above construction method to install the helical pile 10 as an underwater anchor pile for example, a flexible photovoltaic support, not only is rapid underwater construction of the helical pile 10 achieved, but construction quality and efficiency are also guaranteed.

[0057] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A tooling for underwater helical pile construction, characterized in that, The system includes a helical pile (10) and a sleeve (20). The helical pile (10) includes a cylindrical pile body (11) and helical blades (12) disposed on the circumferential surface of the pile body (11). The top of the pile body (11) is covered with a top plate (13). The sleeve (20) is a hollow cylindrical structure. One end of the sleeve (20) is used to connect with the drilling rig (30), and the inner wall of the other end of the sleeve (20) is used to be threaded or snapped to the side of the top plate (13). The pile body (11) includes a first segment (111) and a second segment (112) which are steel pipe structures respectively. The bottom end of the first segment (111) is set as a cone 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. The first segment (111) and the second segment (112) are connected to each other with the connecting member through the connecting holes. The tooling for underwater helical pile construction also includes a support frame (50), which is used to be set on the bottom of the water and to support the first segment (111) during construction.

2. The tooling for underwater helical pile construction according to claim 1, characterized in that, 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 that is compatible with the external thread structure. The top plate (13) and the sleeve (20) are connected by the external thread structure and the internal thread structure.

3. The tooling for underwater helical pile construction according to claim 1, characterized in that, The top plate (13) is provided with a snap-fit ​​edge structure on its side, and one end of the sleeve (20) is provided with a snap-fit ​​groove structure that is adapted to the shape of the top plate (13). The top plate (13) and the sleeve (20) are snapped together by the snap-fit ​​edge structure and the snap-fit ​​groove structure.

4. The tooling for underwater helical pile construction according to claim 1, characterized in that, The top plate (13) is provided with a connecting ear plate (131), which is used to connect the pull rod (40).

5. The tooling for underwater helical 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. A method for underwater helical pile construction, characterized in that, The method, employing the tooling for underwater helical pile construction as described in any one of claims 1-5, comprises the following steps: S1. Fix the drilling rig (30) and determine the construction location; S2. Connect one end of the sleeve (20) of the tooling for underwater helical pile construction to the drill bit of the drilling rig (30), and thread or snap the other end of the sleeve (20) to the top plate (13) of the helical pile (10) of the tooling for underwater helical pile construction. S3. Control the drilling machine (30) to drill. After the spiral pile (10) is spun to the preset position, rotate the drill bit in the opposite direction or pull out the sleeve (20) from the top plate (13) to disconnect the sleeve (20) from the top plate (13).

7. The method for underwater helical pile construction according to claim 6, characterized in that, In step S1, the drilling rig (30) is installed at the boom end of the floating excavator (61) or the boom end of the long arm excavator (62); When the floating dredger (61) is used, the floating dredger (61) floats on the water surface and is connected to the shore by a balancing anchor cable (70). When the long-arm excavator (62) is used, the long-arm excavator (62) is placed on the ground.

8. The method for underwater helical pile construction according to claim 6, characterized in that, In step S2, before the sleeve (20) is connected to the drill bit, the drill bit is connected to the top of the helical pile (10) and drilling is performed. When the top of the helical pile (10) is close to the water surface, the connection between the drill bit and the top of the helical pile (10) is released and then connected to the sleeve (20).

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