Integral lifting guide device for floating construction platform and construction method

Abstract

The invention discloses a floating construction platform integral lifting guide device and a construction method.The device comprises a supporting steel anchor pile, a guide system, a cable collecting system, a pile top reinforcement and a lifting system, and the lifting system comprises a lifting jack, a lifting beam, a steel strand, an anchor bed, an anchor box, a reinforcing plate and a bottom anchor. The supporting steel anchor piles are inserted into rock and hinged to a seabed, supporting force can be provided for lifting the construction platform, the guiding system is used for resisting wave force of the construction platform, the cable collecting system connects the construction platform with gravity anchors through cables, and the construction platform can be accurately anchored and positioned. A lifting jack is installed at the top of a supporting steel anchor pile, a steel strand penetrates into the lifting jack, penetrates through a reserved hole in a construction platform and is fixedly connected with a bottom anchor, and a reinforcing plate is installed at the bottom of the reserved hole, so that stress safety is guaranteed, and a lifting system is formed. The lifting capacity is high, positioning is accurate, the safety performance is high, the overall lifting risk of the offshore floating type construction platform can be reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of offshore construction, and in particular to an integral lifting guide device for a floating construction platform and a construction method thereof. Background Art

[0002] Computer-controlled hydraulic synchronous lifting technology is a new technology for the overall lifting of large structures. It uses flexible steel strands to bear the weight, lifting cylinder clusters, computer control, and new principles of hydraulic synchronous lifting. Combined with modern construction technology, it assembles thousands of tons of components on the ground and then lifts them as a whole to the predetermined position and installs them in place, achieving the overall synchronous lifting of large-tonnage, large-span, and large-area super-large components at ultra-high altitudes.

[0003] my country has independently researched and developed this technology since the 1990s, and has applied it to a series of major construction projects, achieving significant economic and social benefits. The core equipment of computer-controlled hydraulic synchronous lifting technology is computer-controlled, which can automatically complete synchronous lifting, force and displacement control, operation locking, process display and fault alarm and other functions. It is a modern advanced construction equipment integrating mechanical, electrical, hydraulic, sensor, computer and control technology.

[0004] In complex sea areas, under harsh environmental conditions of deep water, bare rocks, high waves and rapid currents, the overall construction of traditional lifting equipment such as floating cranes and lifting cranes is difficult, and has problems such as low construction efficiency, high safety risks, inaccurate positioning, large equipment size and limited working space. Summary of the invention

[0005] The first object of the present invention is to provide a floating construction platform overall lifting guide device, which has strong lifting capacity, precise positioning, and high safety performance, can reduce the overall lifting risk of the offshore floating construction platform and improve construction efficiency.

[0006] The second object of the present invention is to provide a construction method for overall lifting of a floating construction platform.

[0007] The first object of the present invention is achieved by: A floating construction platform integral lifting guide device, characterized in that: a plurality of lifting guide structures are arranged at intervals at the four corners and the middle of the construction platform, each lifting guide structure comprises a supporting steel anchor pile, a guide system, a cable collection system, a pile top reinforcement block, and a lifting system, wherein the lifting system is composed of a first lifting system and a second lifting system, wherein the first lifting system comprises a first lifting jack, a first lifting steel strand, a lifting beam, a reinforcement plate, and a bottom anchor; and the second lifting system comprises a second lifting jack, a second lifting steel strand, a lifting beam, an anchor seat, and an anchor box; The bottom of the supporting steel anchor pile is vertically inserted into the rock and is in an articulated state with the seabed, providing support for the lifting of the construction platform; a pile top reinforcement block is provided at the junction of the top of the supporting steel anchor pile and the lifting beam to ensure the local force safety of the supporting steel anchor pile; a guide system and a cable collection system are provided on the construction platform. The guide system is used to resist the wave force of the construction platform. A gravity anchor is provided on the seabed around the supporting steel anchor pile. The cable collection system connects the construction platform with the gravity anchor through a cable, which can accurately anchor and position the construction platform; A lifting beam is installed on the top of the supporting steel anchor pile, a first lifting jack is provided in the middle of the upper part of the lifting beam, a reinforcing plate with a circular hole in the middle is provided at the bottom of the reserved hole on the construction platform, a bottom anchor is installed at the bottom of the upper chord of the construction platform, a first lifting steel strand is inserted into the first lifting jack, the first lifting steel strand passes through the lifting beam, the reserved hole on the construction platform, the reinforcing plate from top to bottom in sequence, and is connected and anchored to the bottom anchor, so that the lower end of the first lifting steel strand is anchored on the bottom anchor, forming a first lifting system; A second lifting jack is provided on the upper side of the lifting beam, and an anchor seat is provided on the top of the upper chord of the construction platform. The bottom end of the anchor box is hinged to the top end of the anchor seat through a pin shaft, and the second lifting steel strand is inserted into the second lifting jack. The second lifting steel strand passes through the lifting beam and the anchor box in sequence from top to bottom and is connected and fixed to the anchor seat, so that the lower end of the second lifting steel strand is anchored on the anchor box to form a second lifting system.

[0008] Furthermore, the supporting steel anchor piles are made of φ4800*60mm steel pipes.

[0009] Furthermore, the guide system is assembled and welded with HN900*300 steel and 16mm and 28mm steel plates.

[0010] Furthermore, the pile top reinforcement block adopts 20mm and 28mm thick steel plates, and the pile top reinforcement block can enhance the local pressure bearing force of the pile top of the supporting steel anchor pile 1.

[0011] Furthermore, the lifting beam adopts a 1.3m*2.0m steel box beam, and the lifting beam is provided with holes for passing the first lifting steel strand and the second lifting steel strand. Multiple stiffening ribs are arranged inside the beam body of the lifting beam to improve the stress state of the lifting beam.

[0012] Furthermore, the first lifting jack adopts a 350t continuous jack, and the second lifting jack adopts a 200t continuous jack; since the lifting weight of the construction platform is about 8350t, the first lifting system adopts 32 first lifting jacks, and the second lifting system adopts 52 200t second lifting jacks, with a total lifting capacity of 14400t.

[0013] Furthermore, the first lifting steel strand and the second lifting steel strand are both made of steel strand with strength fpk=1860Mpa and diameter φ15.24mm, wherein each first lifting jack is provided with 31 bundles of first lifting steel strands, and each second lifting jack is provided with 19 bundles of second lifting steel strands.

[0014] Furthermore, the anchor seat and anchor box are mainly made of 20mm and 30mm thick steel plates. Holes are reserved during the production of both, and they are connected by pins.

[0015] Furthermore, the reinforcing plate is made of a 600*500*40mm steel plate with a circular hole in the middle.

[0016] Furthermore, the bottom anchor adopts a special anchor.

[0017] The second object of the present invention is achieved by: A construction method for overall lifting of a floating construction platform, the specific steps are as follows: Step 1: The construction platform is processed and floated to the site and anchored; After the construction platform and the guide system are processed and assembled, they are transported to the construction site, and the gravity anchor is anchored to the designed position on the seabed. The gravity anchor is anchored to the construction platform through cables. The cable retracting system of the construction platform can be adjusted to retract and release the cables to adjust the construction platform to the designed position. Step 2: Lower and drive supporting steel anchor piles; Lower and drive the supporting steel anchor piles at the construction pile positions of the floating construction platform, so that the supporting steel anchor piles are in an articulated state with the rock and the seabed and have the supporting capacity; when lowering and driving, ensure the verticality of the supporting steel anchor piles to ensure the smooth lifting of the construction platform; Step 3: Install the pile top reinforcement block; Install the welded pile top reinforcement block at the junction of the top of the supporting steel anchor pile and the lifting beam, and weld it strictly according to the requirements; Step 4: Install the lifting beam; Install and fix the lifting beam in the middle position above the supporting steel anchor pile. It is important to ensure that the holes on the lifting beam structure for passing the first and second lifting steel strands are concentric with the reserved holes on the construction platform structure for passing the first and second lifting steel strands, so as to avoid damage caused by friction between the first and second lifting steel strands and the hole wall due to misalignment. Step 5: Install the first lifting jack and the second lifting jack; The first lifting jack is installed and fixed in the middle of the upper lifting beam structure, and the second lifting jack is installed and fixed on the upper side of the lifting beam structure, and the pressure sensor, oil pipe, pump station and other supporting equipment are installed at the same time; Step 6: Install the first lifting steel strand and the second lifting steel strand; Steel strands are divided into left-hand and right-hand types due to the need for force. The direction of rotation should be noted during installation. The same jack has half left-hand and half right-hand steel strands. Insert the first lifting steel strand into the first lifting jack; insert the second lifting steel strand into the second lifting jack. Step 7: Install reinforcement plates, bottom anchors, anchor seats and anchor boxes; After the bottom end of the first lifting steel strand is inserted into the reinforcing plate from top to bottom, the first lifting steel strand is anchored to the bottom of the upper chord of the construction platform with a bottom anchor. When installing the reinforcing plate, ensure that it is concentric with the reserved hole of the construction platform; install the anchor seat on the top of the upper chord of the construction platform, and then connect the anchor seat to the anchor box with a pin shaft, and then insert the second lifting steel strand into the anchor box for anchoring; Step 8: Joint debugging and testing of equipment; Conduct joint commissioning and testing of the related supporting equipment of the first lifting jack and the second lifting jack to check whether each equipment is normal; Step 9: Pre-press the supporting steel anchor piles; Pre-compress the supporting steel anchor piles at the middle and corner points of the root respectively to verify the vertical bearing capacity of the supporting steel anchor piles and eliminate the inelastic deformation, so as to prevent the supporting steel anchor piles from causing safety risks due to insufficient bearing capacity or uneven settlement during the formal lifting stage; Step 10: Officially raise the construction platform; The construction platform is lifted at the end of low tide and high tide. The lifting should be carried out in stages, and the synchronization of each jack should be ensured. When the construction platform is lifted, the first lifting jack and the second lifting jack are started respectively, and the first lifting steel strand and the second lifting steel strand are tightened first to make the first lifting steel strand and the second lifting steel strand under stress, and then the first lifting steel strand and the second lifting steel strand are tightened to lift the construction platform. Every time the construction platform is lifted by 2m, the cable must be loosened through the cable retraction system. This can not only adjust the position of the construction platform, but also avoid safety risks to the construction platform caused by excessive force on the cable. After lifting to the design elevation, observe the overall condition of the construction platform, and then lift the construction platform by an additional 0.5m to facilitate the subsequent installation and welding of the supporting structure of the construction platform.

[0018] The supporting steel anchor piles of the present invention are inserted into the rock and are in an articulated state with the seabed, which can provide support for the lifting of the construction platform. The guide system is used to resist the wave force of the construction platform. The cable collection system connects the construction platform with the gravity anchor through the cable, and can accurately anchor and position the construction platform. By installing a lifting jack on the top of the supporting steel anchor pile, the steel strand is inserted into the lifting jack, and passes through the reserved hole on the construction platform and is connected and fixed with the bottom anchor. A reinforcing plate is installed at the bottom of the reserved hole to ensure force safety, thereby forming a lifting system.

[0019] Advantages of the present invention: 1. Through the expansion combination of lifting system, the lifting weight, span and area are not restricted; 2. Steel strands are used for load bearing. As long as there are reasonable load-bearing hanging points, the lifting height and lifting range are not restricted; 3. The lifting jack has reverse motion self-locking property, the lifting process is very safe, and the construction platform can be reliably locked at any position during the lifting process; 4. The lifting system has millimeter-level fine-tuning function, which can achieve precise vertical positioning in the air; 5. The lifting guide device is small in size, light in weight, and has a large carrying capacity. It is particularly suitable for lifting large-tonnage components in narrow spaces or indoors, solving the problems of high safety risks of the lifting lugs, slings and other structures and high overall construction difficulty in the traditional floating and lifting solutions. 6. The lifting guide device has a high degree of automation, convenient and flexible operation, good safety, high reliability, wide adaptability and strong versatility; 7. The guiding system and cable collection system can accurately locate and adjust the position of the construction platform.

[0020] The present invention can be applied to the lifting construction of various large structures through simple modification. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a plan layout diagram of the present invention; Figure 2 It is a structural elevation diagram of the present invention; Figure 3 It is a side structural diagram of the present invention; Figure 4 It is a plan view of the guidance system; Figure 5 It is the elevation view of the anchor seat and anchor box; Figure 6 It is a side view of the anchor seat and anchor box. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0023] A floating construction platform integral lifting guide device, wherein a plurality of lifting guide structures are arranged at intervals at the four corners and the middle of the construction platform 15, each lifting guide structure comprises a supporting steel anchor pile 1, a guide system 2, a cable collection system 3, a pile top reinforcement block 4, and a lifting system 5, wherein the lifting system 5 is composed of a first lifting system 51 and a second lifting system 52, wherein the first lifting system 51 comprises a first lifting jack 6, a first lifting steel strand 7, a lifting beam 10, an anchor seat 11, a reinforcement plate 13, and a bottom anchor 14; and the second lifting system 6 comprises a second lifting jack 8, a second lifting steel strand 9, a lifting beam 10, and an anchor box 12; The bottom end of the supporting steel anchor pile 1 is vertically inserted into the rock and is in an articulated state with the seabed, providing support for the lifting of the construction platform 15; a pile top reinforcement block 4 is provided at the junction of the top of the supporting steel anchor pile 1 and the lifting beam 10 to ensure the local force safety of the supporting steel anchor pile 1; a guide system 2 and a cable collection system 3 are provided on the construction platform 15, and the guide system 2 is used to resist the wave force of the construction platform 15. A gravity anchor is provided on the seabed around the supporting steel anchor pile 1, and the cable collection system 3 connects the construction platform 15 with the gravity anchor through a cable, which can accurately anchor and position the construction platform 15; A lifting beam 10 is installed on the top of the supporting steel anchor pile 1, a first lifting jack 6 is provided in the middle of the upper part of the lifting beam 10, a reinforcing plate 13 with a circular hole in the middle is provided at the bottom of the reserved hole 151 on the construction platform 15, a bottom anchor 14 is installed at the bottom of the upper chord 152 of the construction platform 15, a first lifting steel strand 7 is inserted into the first lifting jack 6, the first lifting steel strand 7 passes through the lifting beam 10, the reserved hole 151 on the construction platform 15, and the reinforcing plate 13 from top to bottom, and then is connected and anchored to the bottom anchor 14, so that the lower end of the first lifting steel strand 7 is anchored on the bottom anchor 14, forming a first lifting system 51; A second lifting jack 8 is provided on the upper side of the lifting beam 10, and an anchor seat 11 is provided on the top of the upper chord 152 of the construction platform 15. The bottom end of the anchor box 12 is hinged to the top end of the anchor seat 11 through a pin shaft. The second lifting steel strand 9 is inserted into the second lifting jack 6. The second lifting steel strand 9 passes through the lifting beam 10 and the anchor box 12 from top to bottom in sequence and is connected and fixed to the anchor seat 11, so that the lower end of the second lifting steel strand 9 is anchored on the anchor box 12, forming a second lifting system 52.

[0024] The supporting steel anchor pile 1 adopts φ4800*60mm steel pipe.

[0025] The guide system 2 is assembled and welded by HN900*300 steel and 16mm and 28mm steel plates.

[0026] The pile top reinforcement block 4 is made of 20mm and 28mm thick steel plates, and the pile top reinforcement block 4 can enhance the local pressure bearing force of the pile top of the supporting steel anchor pile 1.

[0027] The lifting beam 10 adopts a 1.3m*2.0m steel box beam, and is provided with a through hole 101 for passing the first lifting steel strand 7 and the second lifting steel strand 9. A plurality of stiffening ribs are arranged inside the beam body of the lifting beam 10 to improve the stress state of the lifting beam 10.

[0028] The first lifting jack 6 adopts a 350t continuous jack, and the second lifting jack 8 adopts a 200t continuous jack; since the lifting weight of the construction platform 15 is about 8350t, the first lifting system 51 adopts 32 first lifting jacks 6, and the second lifting system 52 adopts 16 200t second lifting jacks 8, with a total lifting capacity of 14400t.

[0029] The first lifting steel strand 7 and the second lifting steel strand 9 are both made of steel strands with a strength of fpk=1860Mpa and a diameter of φ15.24mm. Each first lifting jack 6 is provided with 31 bundles of first lifting steel strands 7, and each second lifting jack 8 is provided with 19 bundles of second lifting steel strands 9.

[0030] The anchor seat 11 and the anchor box 12 are mainly made of 20 mm and 30 mm thick steel plates. Holes are reserved during the production of both, and they are connected by pins.

[0031] The reinforcing plate 13 is made of a 600*500*40mm steel plate with a circular hole in the middle.

[0032] Bottom anchor 14 adopts special anchor.

[0033] A construction method for overall lifting of a floating construction platform, the specific steps are as follows: Step 1: The construction platform 15 is processed and floated to the site and anchored; After the construction platform 15 and the guide system 2 are processed and assembled, they are transported to the construction site, and the gravity anchor is anchored to the designed position on the seabed. The gravity anchor is anchored to the construction platform 15 through a cable, and the cable retracting system 3 of the construction platform 15 can be adjusted to the designed position by retracting and releasing the cable. Step 2: lower and drive the supporting steel anchor pile 1; Lower and drive the supporting steel anchor pile 1 at the construction pile position of the floating construction platform 15, so that the supporting steel anchor pile 1 is in a hinged state with the rock and the seabed, and has the supporting capacity; when lowering and driving, ensure the verticality of the supporting steel anchor pile 1 to ensure the smooth lifting of the construction platform 15; Step 3: Install the pile top reinforcement block 4; Install the welded pile top reinforcement block 4 at the junction of the top of the supporting steel anchor pile 1 and the lifting beam 10, and weld strictly according to the requirements; Step 4: Install the lifting beam 10; The lifting beam 10 is installed and fixed in the middle position above the supporting steel anchor pile 1. It should be noted that the through hole 101 on the lifting beam 10 structure for passing the first lifting steel strand 7 and the second lifting steel strand 9 and the reserved hole 151 on the construction platform 15 structure for passing the first lifting steel strand 7 and the second lifting steel strand 9 should be concentric to avoid the first lifting steel strand 7 and the second lifting steel strand 9 from rubbing against the hole wall due to the misalignment. Step 5: Install the first lifting jack 6 and the second lifting jack 8; The first lifting jack 6 is installed and fixed in the middle of the upper part of the lifting beam 10 structure, and the second lifting jack 8 is installed and fixed on the upper side of the lifting beam 10 structure, and the pressure sensor, oil pipe, pump station and other supporting equipment are installed at the same time; Step 6: Install the first lifting steel strand 7 and the second lifting steel strand 9; Due to the need for force, steel strands are divided into left-hand and right-hand types. Pay attention to the rotation direction during installation. The same jack has half left-hand and half right-hand steel strands; insert the first lifting steel strand 7 into the first lifting jack 6; and insert the second lifting steel strand 9 into the second lifting jack 8.

[0034] Step 7: Install the reinforcement plate 13, bottom anchor 14, anchor seat 11 and anchor box 12; After the bottom end of the first lifting steel strand 7 passes through the reinforcing plate 13 from top to bottom, the first lifting steel strand 7 is anchored to the bottom of the upper chord 152 of the construction platform 15 with the bottom anchor 14. When installing the reinforcing plate 13, ensure that it is concentric with the reserved hole 151 of the construction platform 15; install the anchor seat 11 on the top of the upper chord 152 of the construction platform 15, and then connect the anchor seat 11 to the anchor box 12 with a pin shaft, and then pass the second lifting steel strand 9 into the anchor box 12 for anchoring.

[0035] Step 8: Joint debugging and testing of equipment; Conduct joint commissioning and testing of the related supporting equipment of the first lifting jack 6 and the second lifting jack 8 to check whether each equipment is normal; Step 9: pre-pressing the supporting steel anchor pile 1; Pre-compress the four middle and four corner support steel anchor piles 1 respectively to verify the vertical bearing capacity of the support steel anchor piles 1 and eliminate the inelastic deformation, so as to prevent the support steel anchor piles 1 from causing safety risks due to insufficient bearing capacity or uneven settlement during the formal lifting stage; Step 10: formally lifting the construction platform 15; The construction platform 15 is lifted at the end of low tide and high tide. The lifting should be carried out in stages, and the synchronization of each jack is ensured. When the construction platform 15 is lifted, the first lifting jack 6 and the second lifting jack 8 are respectively started, and the first lifting steel strand 7 and the second lifting steel strand 9 are first tightened to make the first lifting steel strand 7 and the second lifting steel strand 9 in a stressed state, and the first lifting steel strand 7 and the second lifting steel strand 9 are further tightened to lift the construction platform 15. The cable must be loosened through the cable retracting system 3 every time the construction platform 15 is lifted by 2m, which can not only adjust the position of the construction platform 15, but also avoid the safety risk of the construction platform 15 caused by excessive force on the cable. After lifting to the design elevation, observe the overall state of the construction platform 15, and then lift the construction platform 15 by 0.5m more to facilitate the subsequent installation and welding of the supporting structure of the construction platform 15.

[0036] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A floating construction platform integral lifting guide device, characterized in that: Several sets of lifting guide structures are arranged at intervals at the four corners and the middle of the construction platform. Each set of lifting guide structures includes supporting steel anchor piles, a guide system, a cable collection system, a pile top reinforcement block, and a lifting system. The lifting system is composed of a first lifting system and a second lifting system. The first lifting system includes a first lifting jack, a first lifting steel strand, a lifting beam, a reinforcement plate, and a bottom anchor; the second lifting system includes a second lifting jack, a second lifting steel strand, a lifting beam, an anchor seat, and an anchor box. The bottom of the supporting steel anchor pile is vertically inserted into the rock and is in an articulated state with the seabed, providing support for the lifting of the construction platform; a pile top reinforcement block is provided at the junction of the top of the supporting steel anchor pile and the lifting beam to ensure the local force safety of the supporting steel anchor pile; a guide system and a cable collection system are provided on the construction platform. The guide system is used to resist the wave force of the construction platform. A gravity anchor is provided on the seabed around the supporting steel anchor pile. The cable collection system connects the construction platform with the gravity anchor through a cable, which can accurately anchor and position the construction platform; A lifting beam is installed on the top of the supporting steel anchor pile, a first lifting jack is provided in the middle of the upper part of the lifting beam, a reinforcing plate with a circular hole in the middle is provided at the bottom of the reserved hole on the construction platform, a bottom anchor is installed at the bottom of the upper chord of the construction platform, a first lifting steel strand is inserted into the first lifting jack, the first lifting steel strand passes through the lifting beam, the reserved hole on the construction platform, the reinforcing plate from top to bottom in sequence, and is connected and anchored to the bottom anchor, so that the lower end of the first lifting steel strand is anchored on the bottom anchor, forming a first lifting system; A second lifting jack is provided on the upper side of the lifting beam, and an anchor seat is provided on the top of the upper chord of the construction platform. The bottom end of the anchor box is hinged to the top end of the anchor seat through a pin shaft, and the second lifting steel strand is inserted into the second lifting jack. The second lifting steel strand passes through the lifting beam and the anchor box in sequence from top to bottom and is connected and fixed to the anchor seat, so that the lower end of the second lifting steel strand is anchored on the anchor box to form a second lifting system.

2. The floating construction platform integral lifting guide device according to claim 1 is characterized in that: The supporting steel anchor piles are made of φ4800*60mm steel pipes.

3. The overall lifting guide device for a floating construction platform according to claim 1 is characterized in that: The guide system is made of HN900*300 steel and 16mm and 28mm steel plates assembled and welded.

4. The integral lifting guide device for a floating construction platform according to claim 1 is characterized in that: The pile top reinforcement block is made of 20mm and 28mm thick steel plates, and the pile top reinforcement block can enhance the local pressure bearing force of the pile top of the supporting steel anchor pile 1.

5. The floating construction platform integral lifting guide device according to claim 1 is characterized in that: The lifting beam adopts a 1.3m*2.0m steel box beam. The lifting beam is provided with holes for passing the first lifting steel strand and the second lifting steel strand. Multiple stiffening ribs are arranged inside the beam body of the lifting beam to improve the stress state of the lifting beam.

6. The floating construction platform integral lifting guide device according to claim 1 is characterized in that: The first lifting jack adopts a 350t continuous jack, and the second lifting jack adopts a 200t continuous jack; since the lifting weight of the construction platform is about 8350t, the first lifting system adopts 32 first lifting jacks and the second lifting system adopts 52 200t second lifting jacks, with a total lifting capacity of 14400t.

7. The floating construction platform integral lifting guide device according to claim 1 is characterized in that: The first lifting steel strand and the second lifting steel strand are both made of steel strand with strength fpk=1860Mpa and diameter φ15.24mm. Each first lifting jack is passed through 31 bundles of first lifting steel strands, and each second lifting jack is passed through 19 bundles of second lifting steel strands.

8. The floating construction platform integral lifting guide device according to claim 1 is characterized in that: The anchor seat and anchor box are mainly made of 20mm and 30mm thick steel plates. Holes are reserved in both and they are connected by pins.

9. The floating construction platform integral lifting guide device according to claim 1, characterized in that: The reinforcement plate is made of 600*500*40mm steel plate with a round hole in the middle; the bottom anchor uses a special anchor.

10. A construction method for overall lifting of a floating construction platform, characterized in that: The specific steps are as follows: Step 1: The construction platform is processed and floated to the site and anchored; After the construction platform and the guide system are processed and assembled, they are transported to the construction site, and the gravity anchor is anchored to the designed position on the seabed. The gravity anchor is anchored to the construction platform through cables. The cable retracting system of the construction platform can be adjusted to retract and release the cables to adjust the construction platform to the designed position. Step 2: Lower and drive supporting steel anchor piles; Lower and drive the supporting steel anchor piles at the construction pile positions of the floating construction platform, so that the supporting steel anchor piles are in an articulated state with the rock and the seabed and have the supporting capacity; when lowering and driving, ensure the verticality of the supporting steel anchor piles to ensure the smooth lifting of the construction platform; Step 3: Install the pile top reinforcement block; Install the welded pile top reinforcement block at the junction of the top of the supporting steel anchor pile and the lifting beam, and weld it strictly according to the requirements; Step 4: Install the lifting beam; Install and fix the lifting beam in the middle position above the supporting steel anchor pile. It is important to ensure that the holes on the lifting beam structure for passing the first and second lifting steel strands are concentric with the reserved holes on the construction platform structure for passing the first and second lifting steel strands, so as to avoid damage caused by friction between the first and second lifting steel strands and the hole wall due to misalignment. Step 5: Install the first lifting jack and the second lifting jack; The first lifting jack is installed and fixed in the middle of the upper lifting beam structure, and the second lifting jack is installed and fixed on the upper side of the lifting beam structure, and the pressure sensor, oil pipe, pump station and other supporting equipment are installed at the same time; Step 6: Install the first lifting steel strand and the second lifting steel strand; Steel strands are divided into left-hand and right-hand types due to the need for force. The direction of rotation should be noted during installation. The same jack has half left-hand and half right-hand steel strands. Insert the first lifting steel strand into the first lifting jack; insert the second lifting steel strand into the second lifting jack. Step 7: Install reinforcement plates, bottom anchors, anchor seats and anchor boxes; After the bottom end of the first lifting steel strand is inserted into the reinforcing plate from top to bottom, the first lifting steel strand is anchored to the bottom of the upper chord of the construction platform with a bottom anchor. When installing the reinforcing plate, ensure that it is concentric with the reserved hole of the construction platform; install the anchor seat on the top of the upper chord of the construction platform, and then connect the anchor seat to the anchor box with a pin shaft, and then insert the second lifting steel strand into the anchor box for anchoring; Step 8: Joint debugging and testing of equipment; Conduct joint commissioning and testing of the related supporting equipment of the first lifting jack and the second lifting jack to check whether each equipment is normal; Step 9: Pre-press the supporting steel anchor piles; Pre-compress the supporting steel anchor piles at the middle and corner points of the root respectively to verify the vertical bearing capacity of the supporting steel anchor piles and eliminate the inelastic deformation, so as to prevent the supporting steel anchor piles from causing safety risks due to insufficient bearing capacity or uneven settlement during the formal lifting stage; Step 10: Officially raise the construction platform; The construction platform is lifted at the end of low tide and high tide. The lifting should be carried out in stages, and the synchronization of each jack should be ensured. When the construction platform is lifted, the first lifting jack and the second lifting jack are started respectively, and the first lifting steel strand and the second lifting steel strand are tightened first to make the first lifting steel strand and the second lifting steel strand under stress, and then the first lifting steel strand and the second lifting steel strand are tightened to lift the construction platform. Every time the construction platform is lifted by 2m, the cable must be loosened through the cable retraction system. This can not only adjust the position of the construction platform, but also avoid safety risks to the construction platform caused by excessive force on the cable. After lifting to the design elevation, observe the overall condition of the construction platform, and then lift the construction platform by an additional 0.5m to facilitate the subsequent installation and welding of the supporting structure of the construction platform.

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