A deep sea floating platform positioning steel cable connection anti-slip device and a construction method thereof

Abstract

The application discloses a deep-sea floating platform positioning steel cable connection anti-slip device and a construction method thereof. The anti-slip device comprises a support frame, a middle shaft, a winding drum, a hinge base and a rotating disc. Two partition plates are vertically fixed on the outer side walls of the winding drum, and the outer side walls of the winding drum are divided into a winding drum I area, a winding drum II area and a winding drum III area from left to right. The hinge base is fixed on the outer side wall of the winding drum III area at the right end of the winding drum. One end of a platform end steel cable is fixed on the hinge base through a closed cable joint. The anti-slip device has good anti-slip effect, large rope capacity, can reduce the risk of steel cable connection slip, improve the efficiency of steel cable connection, and solves the problems of small rope capacity of the anchor boat winch and high risk of steel cable slip during the steel cable connection process. The application has wide applicability, high safety and reliability, high construction efficiency, can be applied to various steel cable connection operations, and has good anti-slip effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel cable connection construction in offshore floating platform positioning, and particularly relates to a deep-sea floating platform positioning steel cable connection anti-slip device and a construction method thereof. BACKGROUND

[0002] At present, bridge construction is moving from crossing rivers and seas to crossing seas. The construction of sea-crossing bridges can not only fully promote the development of coastal economy, but also meet the needs of national marine strategy security. In recent years, the construction technology of sea-crossing bridges has experienced an explosive development. More than 10 sea-crossing bridge projects have been built in the East China Sea, Hangzhou Bay, Jiaozhou Bay, Zhoushan Archipelago, etc. in China. The bridge site selection has gradually developed from the near sea with better sea conditions to the deep sea with more complex sea conditions.

[0003] At present, the construction of domestic sea-crossing bridges is mainly carried out by first constructing a construction trestle as a channel and a construction platform. In the near sea, the thick overburden area, the difficulty of inserting and driving the pipe pile is small, and the side friction of the pipe pile is large, so the supporting capacity meets the requirements. Although the scheme is optimized, the original pipe pile is inserted and driven root by root, and the pipe piles are connected by welding to form a "bench structure". The guide pipe rack structure is optimized. However, in the bare rock area with deep water and no overburden, the construction difficulty of the trestle and the guide pipe rack is extremely great. Therefore, a "self-floating steel truss drilling platform" is innovatively proposed. The platform is integrally processed and manufactured in the factory. The floating box structure is arranged at the bottom of the platform to provide self-floating capacity for the platform. The platform is integrally floated to the bridge site in the form of self-floating + tug power combination. The steel anchor pile is constructed relying on the floating platform. The steel anchor pile is used to integrally lift the steel truss platform to the design elevation by using a plurality of groups of continuous jacks. The steel anchor pile and the steel truss are fixed, the system conversion is completed, the large "bench type" drilling platform structure is formed, and the drilling pile construction is carried out.

[0004] The platform is in a floating state when it is floated to the bridge site. The platform is positioned by a concrete gravity anchor, a steel cable, and a cable collecting system at the top of the platform, so that it has the condition of constructing a steel anchor pile. The cable collecting system is composed of an 850t gravity anchor, a 115mm steel cable, a 560t continuous jack, and a steel strand. The gravity anchor is made of reinforced concrete. Each 115mm steel cable is composed of a closed-type cable joint, an open-type cable joint, and a 115mm steel wire rope. The gravity anchor is connected with the open-type cable joint of a section of steel cable when it is lowered. The section of steel cable is called an anchor end steel cable. The closed-type cable joint of the anchor end steel cable is provided with buoyancy by a floating buoy to prevent it from sinking into the seabed, so as to facilitate the subsequent connection with the platform end steel cable.

[0005] Considering the economic principle, the anchor end steel cable and the platform end steel cable are connected without a special offshore cable connection machine. Instead, an anchor boat is used to complete the connection. However, the rope capacity of the anchor boat winch is small, and the risk of steel cable slipping is relatively large. SUMMARY

[0006] The first object of the present application is to provide a deep-sea floating platform positioning steel cable connection anti-slip device, which has good anti-slip effect, large rope capacity, can reduce the risk of steel cable connection slip, and improve the efficiency of steel cable connection, and solves the problems of small rope capacity of the anchor boat winch and high risk of steel cable slip during the steel cable connection process.

[0007] The second object of the present application is to provide a construction method of the deep-sea floating platform positioning steel cable connection anti-slip device.

[0008] The first object of the present application is achieved in the following manner:

[0009] A deep-sea floating platform positioning steel cable connection anti-slip device, characterized by comprising a support frame, a central shaft, a reel, a hinge seat and a rotating disc, wherein the bottoms of the four support frames are fixed in a rectangular shape on the deck of the anchor boat to provide support force for the central shaft and the reel, the tops of the two adjacent support frames on the left are fixed to the bottom of the left side plate after being made into a triangular structure, the tops of the two adjacent support frames on the right are fixed to the bottom of the right side plate after being made into a triangular structure, and a horizontal connecting rod is arranged between the bottoms of the two adjacent support frames to improve the overall rigidity of the support frame; a central shaft bracket with a bearing is arranged on each of the left side plate and the right side plate, the left and right ends of the central shaft are horizontally arranged on the two symmetrical central shaft brackets to realize rotation, the reel is connected with the central shaft through an inner stiffener, the rotating disc for driving the reel and the central shaft to rotate is composed of a ring rod and a plurality of radial rods, the bottoms of the radial rods are uniformly fixed to the outer wall of one end of the central shaft close to the inner side of the support frame, and the tops of the radial rods are uniformly fixed to the inner wall of the ring rod; two partition plates are vertically fixed to the outer side wall of the reel to divide the outer side wall of the reel into reel I area, reel II area and reel III area from left to right, the hinge seat is fixed to the outer side wall of the reel III area at the right end of the reel, and one end of the platform end steel cable is fixed to the hinge seat through a closed cable joint.

[0010] The two adjacent support frames on the left and the two adjacent support frames on the right are made into triangular structure bodies by HW300*300 steel.

[0011] The reel is made of φ1200*14 steel pipe.

[0012] The central shaft is made of φ203*16mm seamless steel pipe.

[0013] The hinge seat is made of steel plate in the form of double lifting lugs and is connected through a pin shaft to fix the steel cable.

[0014] The inner stiffener, the ring rod and the radial rod are all channel steels.

[0015] The second object of the present application is achieved in the following manner:

[0016] The application discloses a construction method of a deep-sea floating platform positioning steel cable connection anti-slip device.

[0017] Step one, start the anchor boat winch, and make the anchor boat winch in a rope releasing state, the steel wire rope of the anchor boat winch is passed through the bottom of the reel I area, is fixed by a clamp and is wound on the reel I area; when the anchor boat winch releases the rope, 3-5 turns of the steel wire rope should be reserved to prevent slippage.

[0018] Step two, the closed cable joint of the platform end steel cable is passed through the bottom of the reel II area, is fixed on the hinge base of the reel III area through the partition plate and is wound on the reel III area.

[0019] Notes: the steel wire rope of the anchor boat winch is passed through the bottom of the reel I area, is fixed by a clamp and is wound on the reel I area, and the closed cable joint of one end of the platform end steel cable is passed through the bottom of the reel II area, is fixed on the hinge base of the reel III area through the partition plate; the steel cable is passed through the bottom, so that the risk of slippage of the steel cable can be effectively avoided.

[0020] Step three, start the anchor boat winch, and make the anchor boat winch in a rope releasing state, the steel wire rope of the anchor boat winch is passed through the bottom of the reel I area, is fixed by a clamp and is wound on the reel I area; when the anchor boat winch releases the rope, 3-5 turns of the steel wire rope should be reserved to prevent slippage.

[0021] Step four, the closed cable joint of the anchor boat winch is pulled to the anchor boat deck, and is connected with the open cable joint of the other end of the platform end steel cable on the anchor boat deck.

[0022] Step five, after the two sections of the anchor end steel cable and the platform end steel cable are connected, the two sections of the steel cable are combined into a complete steel cable, the anchor boat slowly moves to the floating platform position, the steel cable slides into the sea through the weight, the anchor boat winch is synchronously and slowly released to control the sliding speed of the steel cable, so that the steel cable is not out of control due to a large sliding speed.

[0023] Step six, the anchor boat moves to the floating platform position, the existing winch and the crawler on the top of the floating platform are used to lift and pull the steel cable into the mouth of the turning seat, the steel cable is continuously pulled through the cable hole of the counterforce seat, and the platform end steel cable is connected with the joint of the cable collecting system on the top of the platform.

[0024] Step seven, the above steps are repeated to complete the connection construction of all the steel cables; the floating platform position is adjusted through the cable collecting system on the top of the floating platform, so that the floating platform is accurately positioned.

[0025] The application has the following advantages:

[0026] 1. The conversion of the device increases the amount of rope;

[0027] 2. The fixing of the closed cable joint of the platform end steel cable by the hinge base plays a role in preventing slipping off;

[0028] 3. The anti-slip device can be reused, and is economical;

[0029] 4. The use of the anchor boat winch improves the operation efficiency;

[0030] 5. Wide applicability, reliable safety, and high construction efficiency;

[0031] The present application can be applied to various steel cable connection operations, and can play a good role in preventing slipping off. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the plan view of the present application;

[0033] Figure 2 is the elevation view of the present application;

[0034] Figure 3 is the side view of the present application;

[0035] Figure 4 is the elevation view of the support frame;

[0036] Figure 5 is the elevation view of the rotating disc;

[0037] Figure 6 is the layout of the anti-slip device on the deck of the anchor boat. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in detail below with specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure of the present specification. The present application can also be implemented or applied by different specific embodiments, and the details in the present specification can be modified or changed based on different views and applications without departing from the spirit of the present application.

[0039] A deep-sea floating platform positioning steel cable connection anti-slip device, comprising a support frame 1, a middle shaft 4, a winding drum 6, a hinge base 10, a rotating disc 12, wherein:

[0040] The bottom of the four support frames 1 is fixed on the deck of the anchor boat in a rectangular shape to provide support for the central shaft 4 and the reel 6. The top of the two adjacent support frames 1 on the left is fixed on the bottom of the left supporting plate 3 in a triangular structure. The top of the two adjacent support frames 1 on the right is fixed on the bottom of the right supporting plate 3 in a triangular structure. A horizontal connecting rod 2 is arranged between the bottom of the two adjacent support frames 1 to improve the overall rigidity of the support frame. A bearing-equipped central shaft bracket 5 is arranged on each of the left and right supporting plates 3. The left and right ends of the central shaft 4 are horizontally arranged on the left and right central shaft brackets 5 to rotate. The reel 6 is connected to the central shaft 4 through an inner stiffening rod 7. A rotating disc 12 for driving the reel 6 and the central shaft 4 to rotate is composed of a ring rod 8 and a plurality of radial rods 9. The bottom of the radial rods 9 is fixed on the outer wall of the end of the central shaft 4 close to the inner side of the support frame 1. The top of the radial rods 9 is fixed on the inner wall of the ring rod 8. Two partition plates 11 are vertically fixed on the outer wall of the reel 6 to divide the outer wall of the reel 6 into a reel I area, a reel II area and a reel III area from left to right. A hinge base 10 is fixed on the outer wall of the reel III area at the right end of the reel 6. One end of the platform-end steel cable is fixed on the hinge base 10 through a closed-type cable joint.

[0041] The reel is made of a φ1200×14 steel pipe.

[0042] The central shaft is made of a φ203×16 mm seamless steel pipe.

[0043] The two adjacent support frames 1 on the left and the two adjacent support frames 1 on the right are made of HW300×300 steel into a triangular structure.

[0044] The hinge base 10 is made of steel plates into a double-lifting lug form connected through a pin shaft to fix the steel cable.

[0045] The inner stiffening rod 7, the ring rod 8 and the radial rods 9 are all channel steels.

[0046] A construction method of a deep-sea floating platform positioning steel cable connection anti-slip device is provided, and the specific steps are as follows:

[0047] Step one, start the anchor boat winch, and make the anchor boat winch in a rope releasing state. The steel wire rope for pulling the anchor boat winch passes through the bottom of the reel I area, is fixed on the reel I area and rotates the reel, so that the steel wire rope of the anchor boat winch is wound on the reel I area. When the anchor boat winch releases the rope, 3-5 turns of the steel wire rope should be reserved to prevent slipping.

[0048] Step two, pass the closed-type cable joint of the platform-end steel cable through the bottom of the reel II area, and fix it on the hinge base 10 of the reel III area through the partition plate 11.

[0049] Notes: the steel wire rope of the anchor boat winch passes through the bottom of the reel I area, is fixed and wound on the reel I area, the closed socket at one end of the platform end steel cable passes through the bottom of the reel II area, is fixed on the hinge base 10 of the reel III area by passing around the partition plate 11; passing through the bottom can effectively avoid the risk of steel cable slipping;

[0050] Step three, turn on the anchor boat winch, and make the anchor boat winch in the state of collecting rope. Since the steel wire rope of the anchor boat winch is wound on the reel I area, the anchor boat winch will drive the reel to rotate when collecting rope, so that the platform end steel cable is wound on the reel II area. When the platform end steel cable is wound, 5-8 m should be reserved on the anchor boat deck to facilitate the connection with the anchor end steel cable in the next step;

[0051] Step four, pull the closed socket at one end of the anchor end steel cable that has been thrown to the anchor boat deck, and connect it with the open socket at the other end of the platform end steel cable on the anchor boat deck;

[0052] Step five, after the connection of the anchor end steel cable and the platform end steel cable is completed, the two sections of steel cable are combined into a complete steel cable. The anchor boat slowly moves to the floating platform position, the steel cable slides into the sea by its own weight, and the anchor boat winch synchronously and slowly releases the rope to control the sliding speed of the steel cable and avoid the loss of control caused by the large sliding speed of the steel cable;

[0053] Step six, the anchor boat moves to the floating platform position, the existing winch and crawler on the top of the floating platform are used to lift and pull the steel cable into the mouth of the turning seat, continue to pull the steel cable through the cable hole of the counterforce seat, and reach the joint position of the cable collection system, connect the platform end steel cable with the joint of the cable collection system on the top of the platform;

[0054] Step seven, repeat the above steps to complete the connection construction of all steel cables; adjust the position of the floating platform by the collection and release of the cable collection system on the top of the floating platform to realize the precise positioning of the floating platform.

[0055] Although the present application is disclosed as above, the present application 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 application, and therefore the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A deep sea floating platform positioning steel cable connection anti- slip device, characterized in that: Includes support frames, central shaft, drum, hinge seat, and turntable. Among them: the bottom of the four support frames is rectangular and fixed on the deck of the anchor boat to provide support for the central shaft and drum. The tops of the two adjacent support frames (1) on the left are both made into triangular structures and fixed to the bottom of the left support plate. The tops of the two adjacent support frames (1) on the right are both made into triangular structures and fixed to the bottom of the right support plate. A horizontal connecting rod is provided between the bottoms of the two adjacent support frames to improve the overall rigidity of the support frame. A central shaft bracket with bearing is provided on the left and right support plates respectively. The left and right ends of the central shaft are cross-braced. Rotation is achieved on two symmetrical central shaft brackets on the left and right sides. The drum is connected to the central shaft through an internal stiffening rod. The turntable that drives the drum and central shaft to rotate consists of a ring rod and several radial rods. The bottom of the several radial rods is evenly fixed on the outer wall of the end of the central shaft near the inner side of the support frame, and the top of the several radial rods is evenly fixed on the inner wall of the ring rod. Two partition plates are respectively vertically fixed on the outer wall of the drum, dividing the outer wall of the drum into drum I, drum II and drum III from left to right. The hinge is fixed on the outer wall of drum III at the right end of the drum, and one end of the platform end steel cable is fixed to the hinge through a closed cable joint.

2. The deep sea floating platform positioning steel cable connection anti- unhooking device according to claim 1, characterized in that: The two adjacent support frames (1) on the left and the two adjacent support frames (1) on the right are both made of HW300×300 steel to form a triangular structure frame.

3. The deep sea floating platform positioning steel cable connection anti- slip device according to claim 1, characterized in that: The drum is made of φ1200×14 steel pipe.

4. The deep sea floating platform positioning steel cable connection anti- unhooking device according to claim 1, characterized in that: The central shaft is made of φ203×16mm seamless steel pipe.

5. The deep sea floating platform positioning steel cable connection anti- unhooking device according to claim 1, characterized in that: The hinge is made of steel plate in the form of double lugs and connected by pins to fix the steel cable.

6. The deep sea floating platform positioning steel cable connection anti- unhooking device according to claim 1, characterized in that: The internal stiffening rod, ring rod, and radial rod are all made of channel steel.

7. A method for installing a deep sea floating platform positioning steel cable connection anti-slipping device, characterized in that: The specific steps are as follows: Step 1: Turn on the anchor boat winch and put it in the rope-releasing position. Pass the wire rope of the anchor boat winch through the bottom of section I of the drum, fix it in section I, and rotate the drum so that the wire rope of the anchor boat winch is wound around section I. When releasing the rope, leave 3 to 5 turns of wire rope to prevent slippage. Step 2: Pass the closed cable joint of the platform end steel cable through the bottom of the drum II area and fix it to the hinge seat of the drum III area after passing around the partition plate; Precautions: The wire rope of the anchor boat winch passes through the bottom of drum I, is secured, and is wound around drum I. The closed joint at one end of the platform cable passes through the bottom of drum II, goes around the partition plate, and is secured to the hinge in drum III. Passing through from the bottom can effectively avoid the risk of the cable slipping. Step 3: Start the anchor boat winch and put it in the rope winding state. Since the wire rope of the anchor boat winch is wound in section I of the drum, the anchor boat winch will drive the drum to rotate when winding the rope, so that the platform end steel cable is wound in section II of the drum. When winding the platform end steel cable, leave 5 to 8 meters on the anchor boat deck to facilitate the next step of connecting with the anchor end steel cable. Step 4: Pull the closed joint at one end of the anchor cable to the deck of the anchor boat and connect it to the open joint at the other end of the platform cable on the deck of the anchor boat. Step five, after the two sections of the mooring end and platform end steel cables are connected, they are combined into a complete steel cable. The anchor boat slowly moves towards the floating platform. The steel cable slides into the sea by its own weight. The winch of the anchor boat is synchronized to slowly release the rope to control the sliding speed of the steel cable, so as to avoid the uncontrollable situation caused by the large sliding speed of the steel cable; Step six, the anchor boat moves to the position of the floating platform. The existing winch and crawler on the top of the floating platform are used to lift and pull the steel cable into the mouth of the turning seat. The steel cable continues to pass through the cable hole of the counterforce seat and reaches the joint position of the cable collection system. The platform end steel cable is connected with the joint of the cable collection system on the top of the platform. Step seven, repeat the above steps to complete the connection construction of all steel cables. The floating platform is precisely positioned by adjusting the position of the floating platform through the collection and release of the cable collection system on the top of the floating platform.

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