A mobile floating platform suitable for precise construction of deep-water pile foundations

Abstract

The present invention discloses an above-water mobile floating platform suitable for precise construction of deep-water pile foundations, comprising a middle flat-plate boat and a first side flat-plate boat, wherein the second side flat-plate boat and the first side flat-plate boat are symmetrical with each other with the middle flat-plate boat as the center, a fixing assembly capable of being connected as one body is arranged on the upper surfaces of the first side flat-plate boat, the middle flat-plate boat and the second side flat-plate boat, a guide frame is also fixed on the middle flat-plate boat, a plurality of steel casings are arranged on the guide frame, a gap for accommodating the steel casings is reserved between the first side flat-plate boat, the middle flat-plate boat and the second side flat-plate boat, the steel casings are located between the middle flat-plate boat and the first side flat-plate boat and / or the second side flat-plate boat, a limiting assembly is arranged on the outer surface of the steel casings, and the limiting assembly is fixed to the guide frame; the stability of the platform is improved by adding the flat-plate boats, and the stability of the steel casings is enhanced by limiting the position of the steel casings.

Description

Technical Field

[0001] The present invention relates to the field of mobile floating platforms, and in particular to a mobile floating platform on water suitable for precise construction of deep-water pile foundations. Background Art

[0002] An aquatic engineering construction platform is an auxiliary facility used for bored pile foundation construction. It is installed on the side of the bored pile foundation. The bored pile construction equipment, as well as construction materials and supplies, are placed on the aquatic engineering construction platform. Existing aquatic engineering construction platforms are essentially pile foundation structures. That is, on the side of the bored pile foundation to be constructed, a fixed steel construction platform is built based on multiple vertical pile foundations fixed to the bottom of the water. After the project is completed, the construction platform is dismantled and rebuilt at the new construction site. Because the occupation time of an aquatic engineering platform is relatively short, the construction cost of a steel structure platform using a pile foundation is high, the construction period is long, and the overall economic benefits are poor. There are also cases where engineering vessels are used as floating platforms for aquatic engineering construction. However, typical floating platforms are difficult to accurately position, and the swaying of the hull can affect the construction quality of the bored piles.

[0003] A general construction floating platform is assembled by one flatbed boat (with power) and one flatbed boat (without power). A sufficient distance is maintained between the two flatbed boats. I-beam transverse distribution beams and I-beam longitudinal distribution beams with a certain distance are laid on the top deck of the boat. A 1cm thick steel plate panel is laid on the I-beam longitudinal distribution beam. The I-beam transverse distribution beam is welded to the top decks of the two flatbed boats. A single transverse full-length I-beam distribution beam has a total of 12 welds. A single I-beam has two welds on both sides of the transverse ship on the top deck of each flatbed boat. The I-beam and the 1cm thick steel plate panel are welded into a whole and then welded to the I-beam.

[0004] The mobile floating platform on the water needs to maintain stability and, secondly, needs to be accurately positioned, so that the quality of the construction pouring process can be effectively improved. Therefore, how to enhance the stability of the mobile floating platform on the water and the stability of the equipment during pouring, and accurately locate the position of the steel casing, has become an urgent problem to be solved in the field of mobile floating platforms. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art in that while providing a working platform for construction equipment, the mobile platform has poor stability, and to provide a mobile floating platform on water suitable for precise construction of deep-water pile foundations. The stability of the platform is improved by adding a flat boat, and the stability of the steel casing is enhanced by limiting the position of the steel casing. On the basis of enhanced stability, the steel casing can also be accurately positioned by limiting the position, so as to achieve the purpose of improving the casting quality.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] A mobile floating platform on water suitable for precise construction of deep-water pile foundations comprises a parallel middle flat-bed boat and a first side flat-bed boat, wherein a crawler crane is fixed on the middle flat-bed boat, a rotary drilling drill is fixed on the first side flat-bed boat, and the second side flat-bed boat is also included, wherein the second side flat-bed boat and the first side flat-bed boat are symmetrical with each other with the middle flat-bed boat as the center, a fixing assembly capable of connecting the first side flat-bed boat, the middle flat-bed boat and the second side flat-bed boat into one is provided on the upper surfaces of the first side flat-bed boat, the middle flat-bed boat and the second side flat-bed boat, wherein the fixing assembly is fixed to the upper surfaces of the first side flat-bed boat, the middle flat-bed boat and the second side flat-bed boat, and ... middle flat-bed boat, the middle flat-bed boat and the second side flat-bed boat. A guide frame is also fixed, and the guide frame extends to the first side flat plate ship and the second side flat plate ship. A number of steel casings are provided on the guide frame. A gap for accommodating the steel casings is left between the first side flat plate ship, the middle flat plate ship and the second side flat plate ship. The steel casing is located between the middle flat plate ship and the first side flat plate ship and / or the second side flat plate ship. A limiting component is provided on the outer surface of the steel casing, and the limiting component is fixed to the guide frame. A number of platform positioning devices capable of limiting the movement of the floating platform are evenly distributed around the floating platform, and the platform positioning device is fixed to the first side flat plate ship, the middle flat plate ship or the second side flat plate ship.

[0008] At present, common mobile floating platforms on water all adopt double ship structure, and sufficient spacing is maintained between two flat-plate ships, and I-beam transverse distribution beams and I-beam longitudinal distribution beams with a certain spacing are laid on the top deck of the ship, and a steel plate panel with a thickness of 1 cm is laid on the I-beam longitudinal distribution beam. The I-beam transverse distribution beam is welded to the top decks of the two flat-plate ships. A single transverse full-length I-beam distribution beam has a total of 12 welds, and a single I-beam has two welds on each side of the transverse ship on the top deck of each flat-plate ship. The I-beam and the 1 cm thick steel plate panel are welded into a whole in blocks and then welded to the I-beams. In the present invention, a three-ship structure is adopted to build a mobile floating platform. The welding of I-beams between the three hulls not only provides a working platform for construction equipment, but also increases the stability of the mobile floating platform when working on the water. The middle flat-plate ship is slightly staggered from the first side flat-plate ship and the second side flat-plate ship to form a "U-shaped" groove of the floating platform. The guide frame is installed at the position of the "type" groove to lay the steel casing and is welded to the top deck of the floating platform. The guide frame is larger than the diameter of the steel casing. The top and bottom layers of the guide frame are each installed with a limit assembly to fix the steel casing and adjust the verticality of the steel casing. After the verticality of the steel casing is adjusted, the top mouth of the steel casing is locked by the limit assembly of the top and bottom layers of the guide frame to ensure the verticality. The steel section can be temporarily welded in the guide hole during laying. The size of the guide hole can be flexibly adjusted according to the diameter of the pile foundation to be laid. The stability of the platform is improved by adding a flat boat, and the stability of the steel casing is enhanced by limiting the position of the steel casing. In the present invention, the position of each platform can be calculated according to the measurement of the platform position. Through the function of the platform positioning device, it can effectively ensure that the position of the floating platform will not deviate significantly, and through the adjustment of the limit assembly, the precise positioning of the steel casing can be effectively achieved, thereby further improving the quality of pouring.

[0009] Furthermore, the fixed assembly includes a longitudinal distribution beam and a transverse distribution beam. The longitudinal distribution beam is located above the transverse distribution beam, the longitudinal distribution beam and the transverse distribution beam are perpendicular to each other, and the longitudinal distribution beam and the transverse distribution beam are fixedly connected. The longitudinal distribution beam and the transverse distribution beam in the present invention are arranged vertically, which can effectively provide support for both lateral external forces and longitudinal external forces. The longitudinal distribution beam and the transverse distribution beam are made of I-beams. I-beams can maintain strong stability under external forces, thereby making the entire structure more stable under external forces.

[0010] Furthermore, a transverse connector is fixed below the transverse distribution beam, and a longitudinal connector is provided between the transverse connector and the first side flatbed boat, the middle flatbed boat, and the second side flatbed boat. The longitudinal connector and the transverse connector are perpendicular to each other, and the lower end of the longitudinal connector is fixed to the first side flatbed boat, the middle flatbed boat, or the second side flatbed boat, and the upper end is fixed to the transverse connector. By fixing the longitudinal connector and the transverse connector, the connection between the flatbed boat hull and the upper platform can effectively provide support for both lateral and longitudinal external forces, making the mobile floating platform more stable.

[0011] Furthermore, the limit assembly includes an upper jack group and a lower jack group, both of which are attached to the outer surface of the steel casing and fixed to the guide frame. In the present invention, the upper and lower jack groups are used to fix the steel casing, and the two jack groups work together to effectively calibrate the straightness.

[0012] Furthermore, the upper and lower jack groups each include a number of independent jacks evenly distributed around the outer circumference of the steel casing. The independent jacks of the upper and lower jack groups are all located on the same horizontal plane. Four 1 / 4 annular sleeves that can be spliced ​​into a complete ring are provided between the independent jacks and the steel casing, and the 1 / 4 annular sleeves are fixed together by bolts. The location of the independent jacks of the upper jack group on the same horizontal plane ensures uniform force application, thereby improving stability. Similarly, the present invention uses independent jacks to adjust the size of the annular sleeve formed by the 1 / 4 annular sleeves, which are then locked with bolts after adjustment. This device can achieve precise positioning of the steel casing.

[0013] Furthermore, floating piers are provided below the first side flatbed boat, the middle flatbed boat, and the second side flatbed boat. Counterweights are provided below the floating piers, and the counterweights are fixedly connected to the floating piers via connecting ropes. The floating piers can reduce the impact of water surface fluctuations on the flatbed boats, and the counterweights and connecting ropes can effectively maintain the stability of the floating piers, thereby maintaining the stability of the mobile floating platform on the water.

[0014] Furthermore, the buoyant pier includes a plurality of buoys and a support frame, wherein the buoys are evenly distributed in a staggered manner. A double-stranded iron wire is provided between the support frame and the buoys, and the support frame and the buoys are fixedly connected by the double-stranded iron wire. In the present invention, the staggered and even distribution of the buoys can effectively and evenly distribute buoyancy, thereby providing support for the platform. The support frame and the double-stranded iron wire can maintain the stability of the distribution structure of the buoys.

[0015] Furthermore, a number of Hall anchors are evenly distributed around the first side flat boat, the middle flat boat and the second side flat boat, and the Hall anchors located at the corners of the first side flat boat and the second side flat boat have an angle of 45° with the edges of the first side flat boat and the second side flat boat.

[0016] Furthermore, acoustic beacons are provided on both the Hall anchor and the floating platform, and the platform positioning device includes a counting device and a winch, the winch is fixed on the first side flatbed ship (4), the middle flatbed ship (2) or the second side flatbed ship (5), a steel wire rope is provided inside the winch, and the end of the steel wire rope outside the winch is fixed to the Hall anchor, and the counting device is provided on the winch and can measure the rope length of the winch.

[0017] In the present invention, acoustic beacons are installed on the Hall anchor and the floating platform to determine the position of the floating platform in the water. According to the position of the measuring platform, the length of the rope that each winch should reel in or release is calculated, and the length is recorded; a counting device and a winch are installed on the floating platform, wherein the counting device includes a drum and an encoder, and the detection shaft of the encoder is coaxially connected to the drum, so that the number of rotations of the drum can be measured in real time, and the length of the wire rope wound on the drum in real time can be calculated; by comparing the real-time length with the calculated preset length, an instruction is issued to the winch to realize real-time automatic adjustment of all winches according to the water level change, so as to ensure that the position of the floating platform does not deviate significantly.

[0018] Furthermore, a control system is provided on the hoist, and the control system is used to perform the following steps:

[0019] S1: Receive the positioning information sent by the acoustic beacon and initialize the serial port.

[0020] S2: Wait after initializing the serial port;

[0021] S3: Determine whether the positioning information is interrupted. If so, receive data; if not, return to step S12;

[0022] S4: Determine whether the received data is synchronized. If so, cache the data. If not, return to step S12.

[0023] S5: Determine whether the cached data has ended. If so, control the winch to retract and release the rope; if not, return to step S12;

[0024] S6: After the winch completes retracting and releasing the rope, return to step S12.

[0025] After receiving the positioning information sent by the acoustic beacon, the control system of the present invention can effectively compare the positioning information with the preset position information, thereby controlling the winch to retract and release the rope to achieve the purpose of controlling the floating platform at the preset positioning position. In order to ensure that the received acoustic beacon information is timely and effective, in the control system of the present invention, the data of the received positioning information is first synchronized and cached, and the positioning information is compared with timely and accurate data, so that the winch can timely and effectively control the positioning position of the floating platform.

[0026] In summary, the present invention has the following beneficial effects compared with the prior art:

[0027] (1) The top of the steel casing is locked by the limit components at the top and bottom of the guide frame to ensure verticality. During installation, the steel section can be temporarily welded in the guide hole. The size of the guide hole can be flexibly adjusted according to the diameter of the pile foundation to be installed. The platform stability is improved by adding a flatbed ship, and the stability of the steel casing is enhanced by limiting the position of the steel casing.

[0028] (2) The independent jacks of the upper jack group are all located on the same horizontal plane to ensure uniform force application, thereby improving stability.

[0029] (3) The floating pier can reduce the impact of water surface fluctuations on the flatbed boat, and the counterweight and connecting rope can effectively maintain the stability of the floating pier, thereby maintaining the stability of the mobile floating platform on the water.

[0030] (4) By adjusting the limit assembly, the position of the steel casing can be effectively and accurately positioned, thereby further improving the quality of pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0032] Figure 1 A top view of the present invention;

[0033] Figure 2 It is a front view of the present invention;

[0034] Figure 3 It is a right side view of the present invention;

[0035] Figure 4 This is a schematic structural diagram of the guide frame, steel casing and limit assembly of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the floating pier of the present invention;

[0037] Figure 6 This is a side view of the floating pier of the present invention;

[0038] Figure 7 This is a distribution diagram of floating piers of the present invention;

[0039] Figure 8 This is a schematic diagram of the floating pier structure of the present invention;

[0040] Figure 9 This is a schematic diagram of the Hall anchor distribution of the present invention;

[0041] Figure 10 This is a schematic diagram of the annular sleeve assembly structure of the present invention;

[0042] Figure 11 This is a schematic diagram of the control system of the present invention;

[0043] The reference numerals indicate: 1-crawler crane, 2-middle flatbed boat, 3-rotary drilling rig, 4-first side flatbed boat, 5-second side flatbed boat, 6-guide frame, 7-steel casing, 8-limiting assembly, 9-longitudinal distribution beam, 10-transverse distribution beam, 11-transverse connecting piece, 81-upper jack group, 82-lower jack group, 12-floating pier, 121-pontoon, 122-support frame, 123-double-strand iron wire, 13-counterweight block, 14-1 / 4 annular sleeve, 15-bolt. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0045] Example 1:

[0046] like Figures 1 to 4As shown, this embodiment relates to a water mobile floating platform suitable for precise construction of deep-water pile foundations, including a parallel middle flat-plate boat 2 and a first side flat-plate boat 4, the middle flat-plate boat 2 is fixed with a crawler crane 1, the first side flat-plate boat 4 is fixed with a rotary drilling rig 3, and also includes a second side flat-plate boat 5, the second side flat-plate boat 5 and the first side flat-plate boat 4 are symmetrical with the middle flat-plate boat 2 as the center, and a fixing component capable of connecting the first side flat-plate boat 4, the middle flat-plate boat 2 and the second side flat-plate boat 5 into one is provided on the upper surface of the first side flat-plate boat 4, the middle flat-plate boat 2 and the second side flat-plate boat 5, the fixing component is fixed to the upper surface of the first side flat-plate boat 4, the middle flat-plate boat 2 and the second side flat-plate boat 5, a guide frame 6 is also fixed on the middle flat-plate boat 2, and the guide frame 6 extends to the first side flat-plate boat 4 and the second side flat-plate boat 5, and a plurality of steel casings 7 are provided on the guide frame 6, and a gap for accommodating the steel casing 7 is left between the first side flat-plate boat 4, the middle flat-plate boat 2 and the second side flat-plate boat 5, and the steel casing 7 is located between the middle flat-plate boat 2 and the first side flat-plate boat 4 and / or Between the first and second side flat-plate boats 5, a limit assembly 8 is provided on the outer surface of the steel casing 7, and the limit assembly 8 is fixed to the guide frame 6. A number of platform positioning devices capable of limiting the movement of the floating platform are evenly distributed around the floating platform, and the platform positioning device is fixed to the first side flat-plate boat 4, the middle flat-plate boat 2 or the second side flat-plate boat 5; the fixing assembly includes a longitudinal distribution beam 9 and a transverse distribution beam 10, and the longitudinal distribution beam 9 is located above the transverse distribution beam 10, and the longitudinal distribution beam 9 and the transverse distribution beam 10 are perpendicular to each other, and the longitudinal distribution beam 9 and the transverse distribution beam 10 are fixedly connected; the longitudinal distribution beam 9 and the transverse distribution beam 10 are made of I-beams; a transverse connector 11 is fixed below the transverse distribution beam 10, and a longitudinal connector is provided between the transverse connector 11 and the first side flat-plate boat 4, the middle flat-plate boat 2 and the second side flat-plate boat 5, and the longitudinal connector and the transverse connector 11 are perpendicular to each other, and the lower end of the longitudinal connector is fixed to the first side flat-plate boat 4, the middle flat-plate boat 2 or the second side flat-plate boat 5, and its upper end is fixed to the transverse connector 11.

[0047] Example 2:

[0048] like Figures 1 to 4 As shown, in this embodiment, based on embodiment 1, the limiting assembly 8 includes an upper jack group 81 and a lower jack group 82, and the upper jack group 81 and the lower jack group 82 are both attached to the outer surface of the steel casing 7 and fixed to the guide frame 6; the upper jack group 81 and the lower jack group 82 each include a number of independent jacks evenly distributed on the outer circumference of the steel casing 7, the independent jacks of the upper jack group 81 are all located in the same horizontal plane, and the independent jacks of the lower jack group 82 are all located in the same horizontal plane, and four 1 / 4 annular sleeves 14 that can be spliced ​​into a complete ring are provided between the independent jacks and the steel casing 7, and the 1 / 4 annular sleeves are fixed by bolts 15.

[0049] Example 3:

[0050] like Figures 1 to 9 As shown, in this embodiment, based on embodiment 1 or 2, a floating pier 12 is provided under the first side flat boat 4, the middle flat boat 2 and the second side flat boat 5, and a counterweight 13 is provided under the floating pier 12, and the counterweight 13 and the floating pier 12 are fixedly connected by a connecting rope; the floating pier 12 includes a plurality of buoys 121 and a support frame 122, and the plurality of buoys 121 are evenly distributed in sequence and staggered, and a double-strand iron wire 123 is provided between the support frame 122 and the buoy 121, and the support frame 122 and the buoy 121 are fixedly connected by the double-strand iron wire 123; a plurality of Hall anchors are evenly distributed around the first side flat boat 4, the middle flat boat 2 and the second side flat boat 5, and the Hall anchors located at the corners of the first side flat boat 4 and the second side flat boat 5 are at an angle of 45° to the edges of the first side flat boat 4 and the second side flat boat 5.

[0051] During the specific implementation of this embodiment, the lines are first measured and laid out to roughly locate the two pile foundations upstream of the pier to be constructed, and the floating platform is moved to the designated position. After the first rough positioning, the floating platform is anchored and fixed. Then, three positioning ships are deployed upstream, on the left side, and on the right side of the floating platform. The positioning ships are connected to the floating platform by wire ropes, and each positioning ship is equipped with a 2t Hall anchor. During the construction of the two downstream pile foundations, one positioning ship is deployed upstream on the left and right sides of the floating platform, and one positioning ship is deployed downstream of the floating platform. The anchoring distance is 100m, and an anchor cable wire rope is used. According to the position of the pile foundation of each pier, the position of the floating platform is more accurately adjusted by dragging the 20t slow winch arranged on the positioning ship, so that the pile positions of the two upstream pile foundations roughly coincide with the guide holes of the floating platform guide frame. Finally, a corresponding number of Hall anchors are deployed downstream, on the left and right sides, and upstream of the floating platform. The anchoring distance is 200m, and an anchor cable wire rope is used. To ensure the floating platform's ability to adapt to water level fluctuations, pre-assembled buoyant piers are sunk into the water and placed beneath the platform. The buoyancy of the buoyant piers must be greater than the platform's own weight, allowing them to be raised to a certain height without being exposed above the water. To protect the buoyant piers from lateral currents, they are connected to a weighted object with a greater weight than the buoyancy of the piers via cables, and the cables are tightened.

[0052] The floating piers are assembled using oil drums, steel pipes, fasteners, and wire ropes. The steel pipes form the support frame, and the wire ropes are double-stranded. The longitudinal spacing of the piers should not exceed the design value to ensure sufficient buoyancy. During assembly, the piers are first arranged according to the designed spacing using a steel frame. Then, they are connected using steel pipes, fasteners, and double-stranded wire ropes. The wire ropes are covered with rubber sleeves and bolted at the joints. When lashing the floating piers, the wire ropes are first wrapped around the steel pipes in the direction of the bridge before being tied to the piers to ensure a secure tie. Once assembled, the floating piers are placed on the floating platform and move with it.

[0053] Three rings are welded to the center of the first steel casing section, located on the upstream side and on both sides. Wire ropes are threaded through the rings and connected to 5-ton slow-speed winches on the upstream and left and right positioning vessels of the floating platform. The rings on the first steel casing section are towed by three positioning vessels, located upstream, on the left, and right sides of the floating platform, to precisely adjust the casing's verticality. Verticality can be measured using a verticality gauge. Once verticality is adjusted, the casing is secured using four 35-ton jacks on the top and four 35-ton jacks on the lower levels of the guide frame to ensure the required vertical inclination. Once the guide frame is in place, a crawler crane is used to lift the steel casing into the guide frame and lower it vertically using its own weight. Due to the fixed position of the floating piers, movement of the crawler crane on the floating platform will not cause significant floating or deviation. Slight deviation of the guide holes in the guide frame can be fine-tuned using the jacks.

[0054] Example 4:

[0055] like Figures 1 to 11 As shown, this embodiment is based on any one of embodiments 1 to 3, and acoustic beacons are provided on the Hall anchor and the floating platform, the platform positioning device includes a counting device and a winch, the winch is fixed on the first side flatbed ship 4, the middle flatbed ship 2 or the second side flatbed ship 5, a steel wire rope is provided in the winch, the end of the steel wire rope outside the winch is fixed to the Hall anchor, the counting device is arranged on the winch and can measure the rope length of the winch.

[0056] Furthermore, a control system is provided on the hoist, and the control system is used to perform the following steps:

[0057] S1: Receive the positioning information sent by the acoustic beacon and initialize the serial port.

[0058] S2: Wait after initializing the serial port;

[0059] S3: Determine whether the positioning information is interrupted. If so, receive data; if not, return to step S12;

[0060] S4: Determine whether the received data is synchronized. If so, cache the data. If not, return to step S12.

[0061] S5: Determine whether the cached data has ended. If so, control the winch to retract and release the rope; if not, return to step S12;

[0062] S6: After the winch completes retracting and releasing the rope, return to step S12.

[0063] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A floating mobile platform suitable for precise construction of deep-water pile foundations, comprising a middle flat-bed ship (2) and a first side flat-bed ship (4) arranged in parallel, wherein a crawler crane (1) is fixed on the middle flat-bed ship (2), and a rotary drilling rig (3) is fixed on the first side flat-bed ship (4), characterized in that: The second flat-plate boat (5) is symmetrical with the first flat-plate boat (4) with the middle flat-plate boat (2) as the center. A fixing assembly capable of connecting the first flat-plate boat (4), the middle flat-plate boat (2) and the second flat-plate boat (5) as a whole is provided on the upper surfaces of the first flat-plate boat (4), the middle flat-plate boat (2) and the second flat-plate boat (5). The fixing assembly is fixed to the upper surfaces of the first flat-plate boat (4), the middle flat-plate boat (2) and the second flat-plate boat (5). A guide frame (6) is also fixed on the middle flat-plate boat (2), and the guide frame (6) extends to the first flat-plate boat (4) and the second flat-plate boat (5). A plurality of steel casings (7) are arranged on the guide frame (6); a gap for accommodating the steel casings (7) is reserved between the first side flat-bed ship (4), the middle flat-bed ship (2) and the second side flat-bed ship (5); the steel casings (7) are located between the middle flat-bed ship (2) and the first side flat-bed ship (4) and / or the second side flat-bed ship (5); a limiting assembly (8) is arranged on the outer surface of the steel casing (7); the limiting assembly (8) is fixed to the guide frame (6); a plurality of platform positioning devices capable of limiting the movement of the floating platform are evenly distributed around the floating platform; the platform positioning devices are fixed to the first side flat-bed ship (4), the middle flat-bed ship (2) or the second side flat-bed ship (5); A floating pier (12) is provided below the first side flat-bed boat (4), the middle flat-bed boat (2) and the second side flat-bed boat (5), a counterweight block (13) is provided below the floating pier (12), and the counterweight block (13) and the floating pier (12) are fixedly connected by a connecting rope; The floating pier (12) comprises a plurality of buoys (121) and a support frame (122), wherein the plurality of buoys (121) are evenly distributed in a staggered manner in sequence, a double-strand iron wire (123) is provided between the support frame (122) and the buoys (121), and the support frame (122) and the buoys (121) are fixedly connected via the double-strand iron wire (123); A plurality of Hall anchors are evenly distributed around the first side flat-bed ship (4), the middle flat-bed ship (2) and the second side flat-bed ship (5); the Hall anchors located at the corners of the first side flat-bed ship (4) and the second side flat-bed ship (5) have an angle of 45° with the edges of the first side flat-bed ship (4) and the second side flat-bed ship (5).

2. The floating platform suitable for precise construction of deep-water pile foundations according to claim 1, characterized in that: The fixing assembly comprises a longitudinal distribution beam (9) and a transverse distribution beam (10), wherein the longitudinal distribution beam (9) is located above the transverse distribution beam (10), the longitudinal distribution beam (9) and the transverse distribution beam (10) are perpendicular to each other, and the longitudinal distribution beam (9) and the transverse distribution beam (10) are fixedly connected.

3. The floating platform suitable for precise construction of deep-water pile foundations according to claim 2 is characterized in that: A transverse connecting member (11) is fixed below the transverse distribution beam (10), and a longitudinal connecting member is provided between the transverse connecting member (11) and the first side flat-bed ship (4), the middle flat-bed ship (2) and the second side flat-bed ship (5). The longitudinal connecting member and the transverse connecting member (11) are perpendicular to each other, and the lower end of the longitudinal connecting member is fixed to the first side flat-bed ship (4), the middle flat-bed ship (2) or the second side flat-bed ship (5), and the upper end thereof is fixed to the transverse connecting member (11).

4. The floating platform suitable for precise construction of deep-water pile foundations according to claim 1, characterized in that: The limiting assembly (8) comprises an upper jack group (81) and a lower jack group (82), and the upper jack group (81) and the lower jack group (82) are both attached to the outer surface of the steel casing (7) and fixed to the guide frame (6).

5. The floating platform suitable for precise construction of deep-water pile foundations according to claim 4, characterized in that: The upper jack group (81) and the lower jack group (82) both include a plurality of independent jacks evenly distributed on the outer circumference of the steel casing (7). The independent jacks of the upper jack group (81) are all located on the same horizontal plane, and the independent jacks of the lower jack group (82) are all located on the same horizontal plane. Four 1 / 4 annular sleeves (14) that can be spliced ​​into a complete circular ring are provided between the independent jacks and the steel casing (7). The 1 / 4 annular sleeves are fixed by bolts (15).

6. The floating platform suitable for precise construction of deep-water pile foundations according to claim 1, characterized in that: Acoustic beacons are provided on both the Hall anchor and the floating platform. The platform positioning device comprises a counting device and a winch. The winch is fixed on the first side flat-bed ship (4), the middle flat-bed ship (2) or the second side flat-bed ship (5). A steel wire rope is provided inside the winch. The end of the steel wire rope outside the winch is fixed to the Hall anchor. The counting device is arranged on the winch and can measure the rope length of the winch.

7. The floating platform suitable for precise construction of deep-water pile foundations according to claim 6, characterized in that: A control system is also provided on the hoist, and the control system is used to perform the following steps: S1: Receive the positioning information sent by the acoustic beacon and initialize the serial port. S2: Wait after initializing the serial port; S3: Determine whether the positioning information is interrupted, if so, receive data; if not, return to step S12; S4: Determine whether the received data is synchronized, if so, cache the data, if not, return to step S12; S5: Determine whether the cached data is finished, if so, control the winch to retract and release the rope; if not, return to step S12; S6: After the winch completes retracting and releasing the rope, return to step S12.

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