Pre-buried fixing structure, crane and construction method for water pile cap construction

Abstract

This invention belongs to the field of pile cap construction technology, and discloses a pre-embedded fixing structure, crane, and construction method for underwater pile foundation pile cap construction. The pre-embedded fixing structure includes: a pre-embedded base frame, comprising multiple base columns arranged in a circular array, with the upper and lower ends of the multiple base columns fixedly connected by internal supports, and a crossbeam fixedly installed on the outer middle of the base columns; a flange connecting frame, comprising a flange, with a corresponding butt joint column fixedly installed at the bottom of the flange, and the butt joint column and the base column fixedly connected by a detachable clamp; the pre-embedded base frame is erected on the upper end face of the steel pipe pile through the crossbeam, thereby suspending the entire pre-embedded base frame inside the upper opening of the steel pipe pile. In this invention, the base columns are arranged in a circular array and the upper and lower ends are connected by internal supports, forming a spatial truss with strong integrity. The crossbeam is used to erect the pre-embedded base frame on the upper end of the steel pipe pile, and the flange connecting frame is quickly connected to the pre-embedded base frame through a detachable clamp, which facilitates separate transportation and on-site assembly.

Description

Technical Field

[0001] This invention belongs to the field of pile cap construction technology, specifically relating to a pre-embedded fixing structure, crane and construction method for underwater pile foundation pile cap construction. Background Technology

[0002] The construction of the shore connection structure foundation requires the installation, dismantling, and hoisting of a large amount of materials such as I-beams, reinforcing bars, and formwork. Due to the impact of waves, the multi-functional barge and crane vessel on site sway up and down and side to side during the material hoisting process.

[0003] If the vessel sways, it will directly cause a significant decrease in the speed of hoisting operations, making it difficult to guarantee the accuracy of hoisting positioning and for operators to accurately control the placement of the hoisted load. At the same time, the swaying vessel also greatly increases the risk of collisions, detachment, or even falls of the hoisted materials with surrounding components, seriously threatening the personal safety of construction workers and severely restricting project quality and construction progress. These problems are particularly prominent in the high-precision docking and high-intensity installation and dismantling conditions of underwater pile foundation caps.

[0004] To mitigate the problem of ship swaying caused by waves, existing technologies often employ measures such as optimizing ship mooring arrangements, increasing ship tonnage, selecting favorable sea state windows for construction, or installing dynamic positioning systems. However, these solutions either significantly increase construction costs and equipment investment, or are limited by the accuracy of sea state forecasts and sudden swells, failing to fundamentally eliminate the adverse effects of swaying on lifting operations, and are difficult to apply universally and economically in conventional engineering projects.

[0005] Therefore, there is an urgent need to design a pre-embedded fixing structure that can reliably connect with existing steel pipe piles and facilitates separate transportation and rapid on-site assembly to solve the current technical problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a pre-embedded fixing structure, crane, and construction method for the construction of underwater pile foundation caps that can reliably connect with existing steel pipe piles, facilitate separate transportation and rapid on-site assembly, thereby providing stable support and fixing conditions for the hoisting and installation of materials for underwater pile foundation cap construction, fundamentally improving the safety and efficiency of construction.

[0007] The technical solution of this invention is: a pre-embedded fixing structure for the construction of underwater pile foundation caps, comprising: The pre-embedded base frame includes multiple base columns arranged in a circular array. The upper ends and lower ends of the multiple base columns are fixedly connected by an inner support frame. A crossbeam is fixedly installed on the middle of the outer side of each base column. A flange connection frame includes a flange, the bottom of which is fixedly provided with a mating post corresponding to the bottom post, and the mating post and the bottom post are fixedly connected by a detachable clamp. The embedded base frame is erected on the upper end face of the steel pipe pile via the crossbeam, thereby suspending the entire embedded base frame inside the upper opening of the steel pipe pile.

[0008] Furthermore, the pre-embedded fixing structure for the construction of the underwater pile foundation also includes a radial adjustment mechanism; The radial adjustment mechanism includes a sliding frame that is slidably fitted on the outside of the crossbar, and an adjustment handle for pushing the sliding frame to move along the crossbar; A lower support frame is provided below the sliding frame, and two external clamping rods are provided at the bottom of the lower support frame. Side support plates are symmetrically arranged on the side of the sliding frame near the adjusting handle, and side sliders are fixedly provided at the ends of the side support plates. The adjusting handle includes rotating arms disposed on both sides of the crossbar, the middle part of the rotating arm being rotatably connected to the crossbar, one end of the rotating arm having a groove matching the side slider, and the other end of the rotating arm having a handle; The side slider is slidably disposed inside the groove.

[0009] Furthermore, a side screw is fixedly provided on one end of the side slider away from the side support plate, a limit plate is fixedly provided on the side screw away from the side slider, and a side locking member is threaded onto the side screw; The side locking component includes a locking ring threaded onto the side screw thread, a clearance groove corresponding to the side slider is provided on one side of the locking ring, and a locking handle is fixedly provided on the outer side of the locking ring; Rotating the locking handle allows the locking ring to move along the side screw and press against the side of the side support plate, thereby locking the side slider in the groove.

[0010] Furthermore, guide sleeves are fixedly provided on both sides of the sliding frame, a first guide rod is slidably provided inside the guide sleeve, a cross plate is fixedly provided at the upper end of the first guide rod, and a first bolt is rotatably installed on the top of the sliding frame, the first bolt being threadedly connected to the cross plate; The lower support is fixedly installed at the lower end of the first guide rod.

[0011] Furthermore, an inner clamping groove is provided on the bottom of the lower bracket on the side opposite to the outer clamping rod, and a fastening screw is provided through the inner clamping groove. The fastening screw is perpendicular to the axis of the outer clamping rod and can move along its own axis. One end of the fastening screw is provided with an inner clamping rod for cooperating with the outer clamping rod to clamp onto the upper end of the steel pipe pile, and the other end is threaded with a fastening nut. Rotating the fastening nut can move the inner clamping rod closer to or away from the outer clamping rod.

[0012] Furthermore, the pre-embedded fixing structure for the construction of the underwater pile foundation also includes a flange positioning mechanism; The flange positioning mechanism includes a top frame, and the top frame has a support plate arranged in a circular array around its perimeter. A movable seat is slidably disposed on one end of the support plate away from the top frame, and an inner support block is disposed above the movable seat. A support rod is vertically fixed at the bottom of the top frame. The support rod has an external thread on its outer side. A lifting ring is fitted on the outer side of the support rod. The outer side of the lifting ring is connected to the bottom of the movable seat via a connecting rod. An inner support adjusting nut that is threaded to the outer side of the support rod is rotatably provided at the bottom of the lifting ring. A support screw is rotatably provided at the lower end of the support rod. A positioning connecting seat is fixedly installed at the center of the top of the inner support frame at the upper end of the pre-embedded base frame, and the lower end of the support screw is threadedly connected to the positioning connecting seat.

[0013] Furthermore, a sliding rod is fixedly provided at the bottom of the inner support block, and the sliding rod is slidably connected to the movable seat; A second bolt parallel to the slide rod is provided through the inner support block. The second bolt is threadedly connected to the inner support block, and the bottom end of the second bolt is rotatably connected to the top of the movable seat. A support plate is fixedly installed on the bottom end of the inner support block on the side opposite to the top frame.

[0014] Furthermore, the pre-embedded fixing structure for the construction of the underwater pile foundation also includes a diagonal bracing mechanism corresponding to the bottom column; The diagonal bracing mechanism includes a base column fixing sleeve detachably fitted onto the upper end of the base column. A support arm is fixedly installed on the side of the base column fixing sleeve opposite to the inner support frame. A diagonal bracing rod is hinged to the end of the support arm. A clamp is hinged to the upper end of the diagonal bracing rod. A diagonal bracing tube is fixedly installed at the lower end of the diagonal bracing rod. A diagonal bracing screw is slidably fitted inside the lower end of the diagonal bracing tube. A diagonal bracing adjusting nut is fitted to the outside of the diagonal bracing screw. The diagonal bracing adjusting nut abuts against the bottom end of the diagonal bracing tube. A support foot is hinged to the bottom end of the diagonal bracing screw.

[0015] Cranes, including the pre-embedded fixed structures as described above; The crane also includes a crane body and a crane support, the bottom end of which is detachably connected to the flange.

[0016] The construction method for pre-embedded fixed structures for underwater pile foundation cap construction, using the crane described above, includes the following steps: S1, Installation of embedded base frame: The embedded base frame is hoisted into the steel pipe pile. After the installation is completed, the plane position and verticality of the embedded base frame are checked. After the check is correct, the embedded base frame and the steel pipe pile are pre-fixed. S2, Pile core concrete pouring: Pour concrete into the inside of the steel pipe pile so that the lower part of the pre-embedded base frame is embedded in the concrete, and then cure it to the design strength after vibration and compaction. S3, Flange Connection Bracket Installation: Hang the flange connection bracket on the top of the embedded base frame. After the horizontal and vertical positions of the flange connection bracket are adjusted, temporarily fix it to the embedded base frame. Use the holes reserved on the clamp plate to fix the connecting column to the base column with bolts. S4, Crane Installation: Assemble and fix the crane support to the top of the flange, and then firmly connect the crane body to the crane support.

[0017] The beneficial effects of this invention are: (1) In this invention, the bottom column is arranged in a circular array and the upper and lower ends are connected by an internal support frame to form a spatial truss with strong integrity and high torsional stiffness. The crossbeam is used to erect the pre-embedded bottom frame on the upper end of the steel pipe pile. The flange connection frame is quickly connected to the pre-embedded bottom frame through a detachable clamp, which facilitates separate transportation and on-site assembly. (2) A large pushing force is provided by the lever-type adjustment handle to adjust the position of the pre-embedded base frame in the steel pipe pile in the horizontal direction, and to realize the radial position adjustment of the outer clamp rod to adapt to steel pipe piles of different diameters; (3) After the embedded base frame is centered inside the steel pipe pile, the verticality of the embedded base frame is checked. Based on the measured verticality, the lower support frame on the corresponding side is raised and lowered, thereby changing the support height of the crossbeam on the corresponding side, so that the verticality of the embedded base frame meets the design requirements. (4) Rotate the inner support adjusting nut. Since the inner support adjusting nut is threadedly connected to the support rod and rotatably set at the bottom of the lifting ring, when the inner support adjusting nut rotates, the lifting ring rises and falls along the axis of the support rod. The lifting ring pushes each moving seat to slide radially along the support plate through the connecting rod, so that all the inner support blocks simultaneously push outward to tighten the inner hole wall of the flange, thereby causing the axis of the flange to coincide with the axis of the embedded base frame, realizing the alignment and temporary fixation of the flange connecting frame with the embedded base frame in the horizontal direction. (5) The support screw is threaded to the positioning connection seat, and the height of the inner support block can be adjusted according to the actual situation. After the construction is completed, the flange positioning mechanism can be removed and reused. (6) When rotating the second bolt, the axial position of the second bolt is restricted by the moving seat, the inner support block moves up and down along the sliding rod, driving the support plate to rise and fall, thereby supporting the bottom of the flange, changing the support height of the flange, and realizing the adjustment of the verticality of the flange; (7) When the diagonal brace adjusting nut is rotated by adjusting the handle, the diagonal brace adjusting nut pushes the diagonal brace screw to extend and retract, thereby adjusting the total length of the diagonal brace, so that the support foot contacts the support surface, the clamp holds the crane support column, and is hinged to the upper end of the diagonal brace rod to form a triangular stable support, which improves the anti-overturning ability and stability of the crane support column. The length of the diagonal brace mechanism is adjustable to adapt to different support positions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one embodiment of the pre-embedded fixing structure for the construction of underwater pile foundation caps in this invention.

[0019] Figure 2 This is a schematic diagram of the installation state of another embodiment of the pre-embedded fixing structure for the construction of underwater pile foundation caps in this invention.

[0020] Figure 3 This is a partial structural diagram showing the installation state of another embodiment of the pre-embedded fixing structure for the construction of underwater pile foundations in this invention.

[0021] Figure 4 This is a schematic diagram of another embodiment of the pre-embedded fixing structure for the construction of underwater pile foundations according to the present invention.

[0022] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0023] Figure 6 This is a schematic diagram of the radial adjustment mechanism in another embodiment of the pre-embedded fixing structure for the construction of underwater pile foundations of the present invention.

[0024] Figure 7 This is a schematic diagram of the side locking component in another embodiment of the pre-embedded fixing structure for the construction of underwater pile foundations of the present invention.

[0025] Figure 8 for Figure 4 A magnified view of a section at point B in the middle.

[0026] Figure 9 This is a schematic diagram of the flange positioning mechanism in another embodiment of the pre-embedded fixing structure for the construction of underwater pile foundations of the present invention.

[0027] Figure 10 This is a schematic diagram of the inclined bracing mechanism in another embodiment of the pre-embedded fixed structure for the construction of underwater pile foundations of the present invention. Detailed Implementation

[0028] Various exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the invention or its application or use. The invention can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0029] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, without excluding the possibility of encompassing other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figure 1 and 2 As shown, a pre-embedded fixing structure for the construction of a waterborne pile foundation is disclosed, comprising: a pre-embedded base frame 1, including multiple base columns 11 arranged in a circular array, the upper ends and lower ends of the multiple base columns 11 being fixedly connected by an inner support frame 12, and a crossbeam 13 being fixedly installed on the outer middle of the base column 11; a flange connecting frame 2, including a flange 21, the bottom of the flange 21 being fixedly installed with a connecting column 22 corresponding to the base column 11, and the connecting column 22 being fixedly connected to the base column 11 by a detachable clamp 23; the pre-embedded base frame 1 is erected on the upper end face of the steel pipe pile through the crossbeam 13, thereby suspending the entire pre-embedded base frame 1 inside the upper opening of the steel pipe pile. In this embodiment, the base columns 11 are arranged in a circular array and are connected at both ends by the inner support frame 12 to form a spatial truss with strong integrity and high torsional stiffness. The crossbeam 13 is used to erect the pre-embedded base frame 1 on the upper end of the steel pipe pile. The flange connecting frame 2 is quickly connected to the pre-embedded base frame 1 through the detachable clamp 23, which facilitates separate transportation and on-site assembly.

[0031] Specifically, the pre-embedded base frame 1 includes four base columns 11 arranged in a circular array. The base columns 11 are evenly distributed in a circular array to ensure that the load is evenly transferred to the steel pipe pile. The inner support frame 12 has a cross-shaped structure to connect the base columns 11 into a whole, preventing relative displacement or torsion after being stressed. The bottom of the flange 21 is provided with four docking columns 22, which correspond one-to-one with the base columns 11. They are clamped and fixed by clamping plates 23 with high-strength bolts and nuts to achieve axial docking and radial limiting, which ensures both connection strength and allows disassembly.

[0032] In some embodiments, such as Figures 2 to 7 As shown, the pre-embedded fixed structure for the construction of the underwater pile foundation also includes a radial adjustment mechanism 3; the radial adjustment mechanism 3 includes a sliding frame 31 that is slidably fitted on the outside of the crossbeam 13, and an adjusting handle 38 for pushing the sliding frame 31 to move along the crossbeam 13; a lower support frame 35 is provided below the sliding frame 31, and two outer clamping rods 36 are provided at the bottom of the lower support frame 35; a side support plate 312 is symmetrically provided on the side of the sliding frame 31 near the adjusting handle 38, and a side slider 313 is fixedly provided at the end of the side support plate 312; the adjusting handle 38 includes a rotating arm 382 provided on both sides of the crossbeam 13, the middle part of the rotating arm 382 is rotatably connected to the crossbeam 13, one end of the rotating arm 382 is provided with a groove 383 that matches the side slider 313, and the other end of the rotating arm 382 is provided with a handle 381; the side slider 313 is slidably disposed inside the groove 383. The swing arm 382 can be controlled by pushing and pulling the handle 381. When the swing arm 382 swings, the slide groove 383 pushes the side slider 313 to slide inside it, causing the sliding frame 31 to move along the crossbeam 13. The swing of the handle 381 is converted into the linear movement of the sliding frame 31 by using the lever principle, and the symmetrical arrangement on both sides ensures force balance. The lever-type adjusting handle 38 provides a large pushing force to adjust the position of the embedded base frame 1 in the steel pipe pile 7 in the horizontal direction. It also realizes the radial position adjustment of the outer clamping rod 36 to accommodate steel pipe piles 7 of different diameters.

[0033] In the above embodiment, during installation, the embedded base frame 1 is first hoisted above the steel pipe pile 7 and then lowered. Lowering is stopped when the distance between the bottom of the lower support 35 and the top of the steel pipe pile is 1-5 cm. Then, the positions of the sliding frame 31, its lower support 35, and the outer clamping rod 36 are adjusted using the adjusting handle 38, so that the lower support 35 corresponds to the top of the steel pipe pile, and the outer clamping rod 36 abuts against the outer side of the top of the steel pipe pile. The embedded base frame 1 is then lowered further, and the crossbeam 13 is placed on top of the steel pipe pile. The planar position of the embedded base frame 1 is checked, and horizontal adjustment is performed using the corresponding adjusting handle 38 to ensure that the embedded base frame 1 is centered inside the steel pipe pile 7.

[0034] In some embodiments, such as Figures 5 to 7As shown, a side screw 315 is fixedly installed on one end of the side slider 313 away from the side support plate 312. A limit plate 314 is fixedly installed on the side screw 315 away from the side slider 313. A side locking member 39 is threadedly assembled on the side screw 315. The side locking member 39 includes a locking ring 391 threadedly fitted on the thread of the side screw 315. A relief groove 392 corresponding to the side slider 313 is opened on one side of the locking ring 391. The relief groove 392 is used to accommodate the side slider 313 and ensure that the locking ring 391 can move into place. A locking handle 393 is fixedly installed on the outer side of the locking ring 391. Rotating the locking handle 393 can move the locking ring 391 along the side screw 315 and press against the side of the side support plate 312, thereby locking the position of the side slider 313 in the slide groove 383. When adjustment is needed, rotate the locking handle 393 in the opposite direction to move the locking ring 391 away from the side support plate 312 along the side screw 315, releasing the side slider 313 in the slide groove 383. At this time, the push-pull adjustment handle 38 can adjust the position of the sliding frame 31. After adjustment, lock the side slider 313 in the slide groove 383 using the locking handle 393.

[0035] In some embodiments, guide sleeves 311 are fixedly provided on both sides of the sliding frame 31. A first guide rod 32 is slidably provided inside the guide sleeve 311. A cross plate 33 is fixedly provided at the upper end of the first guide rod 32. A first bolt 34 is rotatably mounted on the top of the sliding frame 31 and is threadedly connected to the cross plate 33. A lower bracket 35 is fixedly provided at the lower end of the first guide rod 32. When the first bolt 34 is rotated, since the axial position of the first bolt 34 is fixed, the cross plate 33 moves along the axial direction of the first bolt 34, causing the first guide rod 32 to slide within the guide sleeve 311, thereby driving the lower bracket 35 to rise and fall relative to the crossbeam 13. The cooperation between the guide sleeve 311 and the first guide rod 32 ensures the straightness and stability of the vertical movement.

[0036] In the above embodiment, the purpose of adjusting the lifting of the lower bracket 35 is to adjust the verticality of the embedded base frame 1. After the embedded base frame 1 is centered inside the steel pipe pile 7, the verticality of the embedded base frame 1 is checked. Based on the measured verticality, the lower bracket 35 on the corresponding side is adjusted to lift, thereby changing the support height of the crossbeam 13 on the corresponding side, so that the verticality of the embedded base frame 1 meets the design requirements. Specifically, when the axis of the embedded base frame 1 tilts to one side, the lower bracket 35 on the corresponding side is adjusted to lower relative to the crossbeam 13. When the lower bracket 35 lowers, it pushes the crossbeam 13 upward, causing the embedded base frame 1 to swing and adjust to the other side.

[0037] In some embodiments, such as Figure 5 and 6As shown, the bottom of the lower bracket 35 has an inner clamping groove 351 on the side opposite to the outer clamping rod 36. A fastening screw 371 is installed through the inner clamping groove 351. The fastening screw 371 is perpendicular to the axis of the outer clamping rod 36 and can move along its own axis. One end of the fastening screw 371 is provided with an inner clamping rod 37 for cooperating with the outer clamping rod 36 to clamp the upper end of the steel pipe pile 7. The other end is threaded with a fastening nut 372. Rotating the fastening nut 372 can make the inner clamping rod 37 move closer to or away from the outer clamping rod 36.

[0038] When adjusting the planar position and verticality of the embedded base frame 1, the inner clamping rod 37 is located outside the inner clamping groove 351, the axis of the inner clamping rod 37 is perpendicular to the axis of the outer clamping rod 36, and the outer side of the inner clamping rod 37 abuts against the end face of the lower bracket 35. At this time, the fastening nut 372 applies axial force to the fastening screw 371 to keep the inner clamping rod 37 in a horizontal state, so as to avoid interference with the adjustment of the planar position and verticality of the embedded base frame 1.

[0039] After the plane position and verticality of the embedded base frame 1 are adjusted, the fastening nut 372 is loosened first. Under the action of gravity, the inner clamping rod 37 rotates 90° and becomes parallel to the outer clamping rod 36. The inner clamping rod 37 can move inside the inner clamping groove 351. The fastening nut 372 is tightened again so that the inner clamping rod 37 and the outer clamping rod 36 cooperate to clamp and fix it to the upper end of the steel pipe pile 7, thus realizing the pre-fixation between the embedded base frame 1 and the steel pipe pile 7 before pouring.

[0040] In some embodiments, such as Figures 2 to 4As shown in Figures 8 and 9, the pre-embedded fixed structure for the construction of the underwater pile foundation also includes a flange positioning mechanism 4. The flange positioning mechanism 4 includes a top frame 41, around which there are support plates 411 arranged in a circular array. A movable seat 43 is slidably mounted on one end of the support plate 411 away from the top frame 41, and an inner support block 44 is mounted above the movable seat 43. A support rod 47 is vertically fixed at the bottom of the top frame 41. The outer side of the support rod 47 is provided with external threads, and a lifting ring 48 is fitted on the outer side of the support rod 47. A gap is left between the lifting ring 48 and the support rod 47 so that the lifting ring 48 can move up and down along the support rod 47. The outer side of the lifting ring 48 is connected to the bottom of the movable seat 43 through a connecting rod 46. One end of the connecting rod 46 is hinged to the outer side of the lifting ring 48, and the other end of the connecting rod 46 is hinged to the bottom of the movable seat. The bottom of the lifting ring 48 is rotatably mounted. An inner support adjusting nut 481 is provided, which is threaded to the outside of the support rod 47. The rotational connection between the inner support adjusting nut 481 and the lifting ring 48 is a conventional design and will not be described in detail. A support screw 42 is rotatably provided at the lower end of the support rod 47. A first hexagonal block 421 is fixedly provided on the support screw 42, and a second hexagonal block 471 is fixedly provided on the support rod 47. A positioning connecting seat 14 is fixedly provided at the center of the top of the inner support frame 12 at the upper end of the pre-embedded base frame 1. An internal threaded tube matching the support screw 42 is vertically fixed at the center of the positioning connecting seat 14. The axis of the internal threaded tube coincides with the axis of the pre-embedded base frame 1 or the error is within the design range. The lower end of the support screw 42 is threadedly connected to the positioning connecting seat 14. The axes of the support screw 42, the internal threaded tube, and the pre-embedded base frame 1 coincide or the error is within the design range.

[0041] The inner support adjusting nut 481 is rotated. Since the inner support adjusting nut 481 is threadedly connected to the support rod 47 and rotatably mounted at the bottom of the lifting ring 48, the lifting ring 48 rises and falls axially along the support rod 47 when the inner support adjusting nut 481 rotates. The lifting ring 48 pushes each moving seat 43 to slide radially along the support plate 411 via the connecting rod 46, causing all inner support blocks 44 to move synchronously outward or inward, thereby pressing against the inner hole 211 wall of the flange 21 or releasing it. When the inner support blocks 44 synchronously press against the inner hole 211 wall of the flange 21 outward, it can ensure that the axis of the flange 21 coincides with the axis of the embedded base frame 1 or that the error is within the design range, achieving alignment and temporary fixation of the flange connecting frame 2 with the embedded base frame 1 in the horizontal direction. The support screw 42 is threadedly connected to the positioning connecting seat 14, allowing adjustment of the height of the inner support blocks 44 according to actual conditions. Furthermore, after construction, the flange positioning mechanism 4 can be disassembled and reused.

[0042] In some embodiments, a slide rod 442 is fixedly provided at the bottom of the inner support block 44, and the slide rod 442 is slidably connected to the movable seat 43; a second bolt 45 parallel to the slide rod 442 is provided through the inner support block 44, and the second bolt 45 is threadedly connected to the inner support block 44, with its bottom end rotatably connected to the top of the movable seat 43; a support plate 441 is fixedly provided on the side of the bottom end of the inner support block 44 away from the top frame 41. When the second bolt 45 is rotated, since the axial position of the second bolt 45 is restricted by the movable seat 43, the inner support block 44 moves up and down along the slide rod 442, driving the support plate 441 to rise and fall, thereby supporting the bottom of the flange 21, changing the support height of the flange 21, and realizing the adjustment of the verticality of the flange 21.

[0043] Specifically, two second guide rods 431 are symmetrically fixed on one end of the movable seat 43 near the top frame 41. The support plate 411 has a channel inside that matches the second guide rods 431, and the second guide rods 431 are slidably disposed inside the channel.

[0044] As an example, the top frame 41 has four support plates 411 arranged in a circular array around its perimeter, and four movable seats 43 are slidably disposed on the end of the four support plates 411 opposite to the top frame 41.

[0045] In some embodiments, such as Figure 4 and 10 As shown, the pre-embedded fixed structure for the construction of the underwater pile foundation also includes a diagonal bracing mechanism 5 corresponding to the bottom column 11. The diagonal bracing mechanism 5 includes a bottom column fixing sleeve 51 that is detachably fitted onto the upper end of the bottom column 11. A support arm 57 is fixedly installed on the side of the bottom column fixing sleeve 51 away from the inner support frame 12. A diagonal bracing rod 52 is hinged to the end of the support arm 57. A clamp 53 is hinged to the upper end of the diagonal bracing rod 52. A diagonal bracing tube 58 is fixedly installed at the lower end of the diagonal bracing rod 52. A diagonal bracing screw 54 is slidably fitted inside the lower end of the diagonal bracing tube 58. A diagonal bracing adjusting nut 55 is fitted to the outside of the diagonal bracing screw 54. An adjusting handle 551 is fixedly installed on the outside of the diagonal bracing adjusting nut 55. The diagonal bracing adjusting nut 55 abuts against the bottom end of the diagonal bracing tube 58. A support foot 56 is hinged to the bottom end of the diagonal bracing screw 54. When the diagonal brace adjusting nut 55 is rotated by adjusting handle 551, the diagonal brace adjusting nut 55 pushes the diagonal brace screw 54 to extend or retract, thereby adjusting the total length of the diagonal brace and making the support foot 56 contact the support surface. The clamp 53 holds the crane support column 61 and is hinged to the upper end of the diagonal brace rod 52 to form a triangular stable support, which improves the anti-overturning ability and stability of the crane support column 61. The length of the diagonal brace mechanism 5 is adjustable to adapt to different support positions.

[0046] As an example, the pre-embedded base frame 1 includes four base columns 11 arranged in a circular array. Each of the four base columns 11 is provided with a diagonal bracing mechanism 5. The clamps 53 of the diagonal bracing mechanism 5 are quarter-circular arc-shaped plate mechanisms that match the outer diameter of the crane support column 61. The four clamps 53 of the four diagonal bracing mechanisms 5 are connected end to end to form a ring structure that is fitted onto the outside of the crane support column 61. The ends of the clamps 53 are all fixedly provided with connecting plates along their radial direction. The connecting plates are provided with through holes. The connecting plates of adjacent clamps 53 are assembled and fixedly connected by bolts and nuts.

[0047] Specifically, the bottom column fixing sleeve 51 is pre-drilled with through holes for assembly and fixing with the bottom column 11 by high-strength bolts. The bottom column fixing sleeve 51 is fitted onto the upper end of the bottom column 11. After determining the hole position, the bottom column fixing sleeve 51 is assembled and fixed with the bottom column 11 by high-strength bolts after the hole is drilled.

[0048] like Figure 2 As shown, a crane is disclosed, including the pre-embedded fixing structure as in the above embodiment; The crane also includes the crane body 6 and the crane support 61, the bottom end of which is detachably connected to the flange 21.

[0049] In some embodiments, a construction method for a pre-embedded fixed structure for underwater pile foundation construction is disclosed, employing the crane described in the above embodiments, and including the following steps: S1, Installation of embedded base frame 1: Hoist the embedded base frame 1 into the steel pipe pile 7. After installation, check the plane position and verticality of the embedded base frame 1. After the check is correct, pre-fix the embedded base frame 1 and the steel pipe pile 7. S2, Pile core concrete pouring: Pour concrete into the steel pipe pile 7 so that the lower part of the pre-embedded base frame 1 is embedded in the concrete, and then cure it to the design strength after compaction. S3, Flange connecting bracket 2 installation: Hang the flange connecting bracket 2 on the top of the embedded base frame 1. After the horizontal position and verticality of the flange connecting bracket 2 are adjusted, temporarily fix it to the embedded base frame 1. Use the reserved holes on the clamp plate 23 to fix the connecting column 22 to the base column 11 with bolts. S4, Crane installation: Assemble and fix the crane support 61 on the top of the flange 21, and then firmly connect the crane body 6 to the crane support 61.

[0050] In some embodiments, step S1 further includes adjusting the planar position of the pre-embedded base frame 1 by pushing and pulling the adjustment handle 38; adjusting the verticality of the pre-embedded base frame 1 by rotating the first bolt 34; and tightening the fastening nut 372 to pre-fix the pre-embedded base frame 1 and the steel pipe pile 7 by cooperating with the inner clamping rod 37 and the outer clamping rod 36.

[0051] In some embodiments, step S3 further includes assembling the flange positioning mechanism 4 into the positioning connecting seat 14; rotating the second bolt 45 to adjust the verticality of the flange connecting frame 2; rotating the inner support adjusting nut 481 to make the inner support block 44 abut against the inner hole 211 wall of the flange 21 to adjust the horizontal position of the flange connecting frame 2; re-measuring the horizontal position and verticality of the flange 21, and further tightening the inner support adjusting nut 481 if it is within the design range, so that the inner support block 44 abuts against the inner hole 211 wall of the flange 21 for temporary fixation.

[0052] In some embodiments, after step S2 and before step S3, the bottom column fixing sleeve 51 is first fitted onto the upper outer side of the bottom column 11; in step S4, after the crane support 61 is assembled and fixed on the top of the flange 21, the bottom column fixing sleeve 51 is assembled and fixed in place on the upper end of the bottom column 11, and the clamp 53 is assembled and fixed on the outside of the crane support 61; then the diagonal brace adjusting nut 55 is screwed on to make the support foot 56 stably support the ground.

[0053] The various embodiments of the present invention have now been described in detail. To avoid obscuring the concept of the invention, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0054] The embodiments described above only illustrate some implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A pre-embedded fixing structure for the construction of underwater pile foundation caps, characterized in that, include: The pre-embedded base frame includes multiple base columns arranged in a circular array. The upper ends and lower ends of the multiple base columns are fixedly connected by an inner support frame. A crossbeam is fixedly installed on the middle of the outer side of each base column. A flange connection frame includes a flange, the bottom of which is fixedly provided with a mating post corresponding to the bottom post, and the mating post and the bottom post are fixedly connected by a detachable clamp. The embedded base frame is erected on the upper end face of the steel pipe pile via the crossbeam, thereby suspending the entire embedded base frame inside the upper opening of the steel pipe pile.

2. The pre-embedded fixing structure for underwater pile foundation construction according to claim 1, characterized in that, It also includes a radial adjustment mechanism; The radial adjustment mechanism includes a sliding frame that is slidably fitted on the outside of the crossbar, and an adjustment handle for pushing the sliding frame to move along the crossbar; A lower support frame is provided below the sliding frame, and two external clamping rods are provided at the bottom of the lower support frame. Side support plates are symmetrically arranged on the side of the sliding frame near the adjusting handle, and side sliders are fixedly provided at the ends of the side support plates. The adjusting handle includes rotating arms disposed on both sides of the crossbar, the middle part of the rotating arm being rotatably connected to the crossbar, one end of the rotating arm having a groove matching the side slider, and the other end of the rotating arm having a handle; The side slider is slidably disposed inside the groove.

3. The pre-embedded fixing structure for construction of underwater pile foundation caps according to claim 2, characterized in that: A side screw is fixedly provided on one end of the side slider away from the side support plate, a limit plate is fixedly provided on the side screw away from the side slider, and a side locking component is threaded onto the side screw; The side locking component includes a locking ring threaded onto the side screw thread, a clearance groove corresponding to the side slider is provided on one side of the locking ring, and a locking handle is fixedly provided on the outer side of the locking ring; Rotating the locking handle allows the locking ring to move along the side screw and press against the side of the side support plate, thereby locking the side slider in the groove.

4. The pre-embedded fixing structure for construction of underwater pile foundation caps according to claim 2, characterized in that: Guide sleeves are fixedly provided on both sides of the sliding frame. A first guide rod is slidably provided inside the guide sleeve. A horizontal plate is fixedly provided at the upper end of the first guide rod. A first bolt is rotatably installed on the top of the sliding frame. The first bolt is threadedly connected to the horizontal plate. The lower support is fixedly installed at the lower end of the first guide rod.

5. The pre-embedded fixing structure for construction of underwater pile foundation caps according to claim 4, characterized in that: The bottom of the lower bracket has an inner clamping groove on the side opposite to the outer clamping rod. A fastening screw is installed through the inner clamping groove. The fastening screw is perpendicular to the axis of the outer clamping rod and can move along its own axis. One end of the fastening screw is provided with an inner clamping rod for cooperating with the outer clamping rod to clamp onto the upper end of the steel pipe pile, and the other end is threaded with a fastening nut. Rotating the fastening nut can move the inner clamping rod closer to or away from the outer clamping rod.

6. The pre-embedded fixing structure for underwater pile foundation construction according to claim 1, characterized in that, It also includes a flange positioning mechanism; The flange positioning mechanism includes a top frame, and the top frame has a support plate arranged in a circular array around its perimeter. A movable seat is slidably disposed on one end of the support plate away from the top frame, and an inner support block is disposed above the movable seat. A support rod is vertically fixed at the bottom of the top frame. The support rod has an external thread on its outer side. A lifting ring is fitted on the outer side of the support rod. The outer side of the lifting ring is connected to the bottom of the movable seat via a connecting rod. An inner support adjusting nut that is threaded to the outer side of the support rod is rotatably provided at the bottom of the lifting ring. A support screw is rotatably provided at the lower end of the support rod. A positioning connecting seat is fixedly installed at the center of the top of the inner support frame at the upper end of the pre-embedded base frame, and the lower end of the support screw is threadedly connected to the positioning connecting seat.

7. The pre-embedded fixing structure for construction of underwater pile foundation caps according to claim 6, characterized in that: A sliding rod is fixedly installed at the bottom of the inner support block, and the sliding rod is slidably connected to the movable seat; A second bolt parallel to the slide rod is provided through the inner support block. The second bolt is threadedly connected to the inner support block, and the bottom end of the second bolt is rotatably connected to the top of the movable seat. A support plate is fixedly installed on the bottom end of the inner support block on the side opposite to the top frame.

8. The pre-embedded fixing structure for underwater pile foundation construction according to claim 1, characterized in that, It also includes diagonal bracing mechanisms that correspond one-to-one with the base column; The diagonal bracing mechanism includes a base column fixing sleeve detachably fitted onto the upper end of the base column. A support arm is fixedly installed on the side of the base column fixing sleeve opposite to the inner support frame. A diagonal bracing rod is hinged to the end of the support arm. A clamp is hinged to the upper end of the diagonal bracing rod. A diagonal bracing tube is fixedly installed at the lower end of the diagonal bracing rod. A diagonal bracing screw is slidably fitted inside the lower end of the diagonal bracing tube. A diagonal bracing adjusting nut is fitted to the outside of the diagonal bracing screw. The diagonal bracing adjusting nut abuts against the bottom end of the diagonal bracing tube. A support foot is hinged to the bottom end of the diagonal bracing screw.

9. A crane, characterized in that: Includes the pre-embedded fixing structure as described in any one of claims 1 to 8; The crane also includes a crane body and a crane support, the bottom end of which is detachably connected to the flange.

10. A construction method for a pre-embedded fixed structure for underwater pile foundation construction, employing the crane as described in claim 9, characterized in that... Includes the following steps: S1, Installation of embedded base frame: The embedded base frame is hoisted into the steel pipe pile. After the installation is completed, the plane position and verticality of the embedded base frame are checked. After the check is correct, the embedded base frame and the steel pipe pile are pre-fixed. S2, Pile core concrete pouring: Pour concrete into the inside of the steel pipe pile so that the lower part of the pre-embedded base frame is embedded in the concrete, and then cure it to the design strength after vibration and compaction. S3, Flange Connection Bracket Installation: Hang the flange connection bracket on the top of the embedded base frame. After the horizontal and vertical positions of the flange connection bracket are adjusted, temporarily fix it to the embedded base frame. Use the holes reserved on the clamp plate to fix the connecting column to the base column with bolts. S4, Crane Installation: Assemble and fix the crane support to the top of the flange, and then firmly connect the crane body to the crane support.

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