249 results about "Offshore construction" patented technology

The invention relates to a lifting device which can be reused. The device comprises a platform body, a guiding ring, a platform connecting body, a platform connecting pin, a movable pile fixing frame, a square beam, a ring beam push-pull cylinder bracket, a ring beam push-pull, a movable ring beam, a lifting cylinder, an upper row of push-pull cylinder, an upper row of push-pull cylinder bracket, an upper row of tooth block connecting body, a tooth block, a gear rack, a pile leg, a pile fixing frame connecting pin, a lower row of tooth block connecting body, a lower row of push-pull cylinder, a lower row of push-pull cylinder bracket, a ring beam guiding block and a pile fixing block. The force transmission and the relative movement between the platform body and the pile leg, and the lifting and the lowering of the platform are realized through the platform connecting body, the platform connecting pin, the movable pile fixing frame, the lifting cylinder, the ring beam, the square beam, the tooth block, and the gear rack. The tooth block and the gear rack are meshed through multiple teeth, the whole set of device is produced in a modularized way, and can be reused. The lifting device not only is secure and reliable, but also has low construction cost, thereby greatly saving the offshore construction expense time when be applied to a fixed platform.

The invention provides an offshore installation construction resource-combined type pontoon barge. The combined type pontoon barge (1) comprises a flat plate ship body (2), a portal jib crane (3), a crane (4), a cantilever beam (5), an awler crane (6), a slide rail (7) and a removable deck (8), wherein the portal jib crane (3), the crane (4), the cantilever beam (5), the awler crane (6), the slide rail (7) and the removable deck (8) are arranged on the flat plate ship body, and at the same time, a left and right water ballast tanks (11), a fresh-water tank (12), a bilge tank (13), a hydraulic motive power station tank (generator tank) (14), a fuel oil tank (15), a ballast tank control tank (16), a dust tank (17) and a living tank (18) for meeting the living and residing requirements of 60 persons are arranged on the flat plateship body (2). The pontoon barge is mainly used for the transportation and the installation operation of large structures of ocean engineering, and can also be used for the installation of expansion bend parts, offshore pipe pavement construction operation and the like. The invention has the advantages that the shipping, the transportation and the offshore installation can be realized at the same time, the risk of offshore installation construction is reduced, the offshore construction resources are reduced, and the time is saved.

The invention discloses an offshore auxiliary construction platform device and a using method thereof. A crane system is arranged on a movable support system; the support system comprises two parallel rail beams; a horizontal connecting beam vertical to the length direction of the rail beams is arranged between the two rail beams; the rail beams and the horizontal connecting beam have a box girder structure; two box girders are vertically connected by a diagonal bracing; a bearing platform under the rail beams is provided with a box girder support; a support system is driven to move by a travel mechanism; and the travel mechanism is that a tetrafluoro sliding plate is arranged above the box girder support, the bottom of a bottom flange of a box girder is paved with a stainless steel plate facilitating the mass movement of the platform device, and the stainless steel plate moves on the tetrafluoro sliding plate and is dragged by a traction mechanism positioned on the end parts of the rail beams. The platform device can automatically move to the next working face from one working face, avoid frequent assembly and disassembly and transportation of equipment, reduce safety risks of offshore construction, and improve the efficiency of offshore construction of pier studs.

The invention discloses a construction method of the pile foundation bucket foundation. The foundation consists of a bucket body and a pile foundation; the bucket body comprises an upper wall body, a lower wall body, a cover plate, an upper baffle and a lower baffle. The cover plate is arranged at the upper part of the lower wall body, and the lower baffle is arranged inside the lower wall body, so as to form a lower wall body cavity. The upper wall body is arranged on the cover plate, the upper baffle is arranged inside the cover plate, so as to form an upper wall body cavity. A water-air valve and a concrete pouring valve which are communicated with the upper wall body cavity and the lower wall body cavity are arranged on the cover plate. The bucket body is sunk after the construction of the pile foundation, injecting water into the upper wall body cavity and absorbing water by the lower wall body cavity are main sinking means, and when the bucket body reaches a designed penetrating depth, bottom sealing concrete and in-bucket concrete are poured into the lower wall body cavity, so that a pile is connected with the bucket body. The pile foundation bucket foundation is suitable for being served as a deep-water bridge foundation on the condition of a thick covering layer, gives full play to the characteristics of high vertical bearing capability of the file foundation and convenience in construction of the bucket foundation, has high applicability, simple construction technology, small post-construction settlement, and lower requirement on offshore construction equipment, does not require the building of large construction auxiliary facilities, and is low in construction cost.

The invention discloses a riser component for mounting a deep water jacket riser. The riser component comprises a riser and a floating pipe arranged side by side with the riser, wherein the floating pipe is connected with the riser through a plurality of connecting pieces. The invention also aims to provide a mounting method for the deep water jacket riser. The method comprises the following steps of: 1) injecting water into the floating pipe in the riser component to arrange the riser component beside a jacket; 2) aligning the riser component with the jacket; and 3) fixing a riser clamp on the riser of the riser component to the jacket. By using the technical scheme, the riser is mounted in an entire section to reduce the underwater connection operation, reduce the workload and shorten the construction period; and owing to the existence of the floating pipe during the offshore construction, a large floating crane with high rental cost and resource shortage is not needed. And meanwhile, the riser is arranged as a whole body with the riser clamp to ensure a good alignment effect.

The invention relates to ocean engineering equipment, belongs to the field of maritime work and particularly relates to a novel multifunctional work platform at a shallow sea. The novel multifunctional work platform comprises two major parts of a platform and four pile legs, wherein a diesel generator, a travelling crane, drilling equipment, an anchor machine, a fixed cantilever crane, a safety barrier and a living region are distributed on the platform; driving devices for a platform elevating mechanism are distributed on the tops of the four pile legs; the pile legs are provided with pin shaft holes which are used for positioning; bionic feet are designed at the lower ends of the pile legs; the work platform is composed of four major mechanisms of a platform elevating mechanism, a pile leg elevating mechanism, a platform movement and anchoring mechanism and a large and small travelling crane mechanism. The novel multifunctional operation platform at the shallow sea is automatic in ascending and descending, automatic in movement, high in positioning capability, flexible in operation, high in water depth adaptability, favorable in working stability and applicable to offshore explosion drilling, shallow sea exploration, ocean measurement and offshore construction operations in the other various aspects.

The invention relates to a system for monitoring and controlling the anchorage of ships, belonging to the field of the monitoring and the controlling of the ships. The system comprises a dock main control system, a field detection and communication system and wireless AP (Access Point) equipment, wherein information transmission between the field detection and communication system and the dock main control system is realized by the wireless AP equipment; the dock main control system consists of a web server and a wireless or remote pc (personal computer); the field detection and communication system consists of an anchor chain stress detection module, a sea-wave decibel detection module, a sea-wave flow velocity detection module, a pre-anchor execution module and a field communication system; the anchor chain stress detection module, the sea-wave decibel detection module, the sea-wave flow velocity detection module and the pre-anchor execution module carry out data transmission with the field communication system through a parallel line; and the field communication system is in information transmission connection with the wireless AP equipment through a built-in wireless module. With the adoption of the system provided by the invention, whether dragging of the anchorage happens or not can be judged through remote detection and control, and a corresponding measure is automatically adopted, so that the phenomenon of the dragging of the anchorage can be basically avoided, and offshore construction facilities can be protected.

The invention discloses a floating breakwater. The floating breakwater comprises a plurality of floating boxes which are connected to one another by connecting devices, wherein each floating box comprises an upper floating body and a lower floating body which are in contact from top to bottom and are fixedly arranged; the upper floating body is of a tortuous slope-shaped groove type steel structure, and a plurality of block-shaped energy dissipating devices are arranged on the inward bending surface of the groove of the upper floating body; the lower floating body is a rectangular body made of a high-strength polypropylene material, and a plurality of wave dissipating holes which are perforated and staggered are formed in the lower floating body; and the floating banks are provided with mooring guide rope holes which are used for connecting guide ropes so as to moor the floating boxes in water. The floating breakwater has the beneficial effects that the floating breakwater has a good wave dissipating effect under terrible ocean environments and long-period waves and is simple in structure; and the width of the breakwater is unlimited due to adoption of modular assembly, thereby facilitating offshore construction and later maintenance.

The invention discloses a cylindrical structure and pile group combined type offshore wind turbine foundation, comprising a cylindrical steel wall and a concrete top cover arranged at the top of the cylindrical steel wall, wherein a plurality of radially-arranged pre-stress beams, a plurality of connection beams and a pre-stress connection section are cast on the concrete top cover; the pre-stress connection section is vertically arranged at the center of the concrete top cover; the pre-stress beams are uniformly arranged around the rim of the pre-stress connection section along the circumference of the pre-stress connection section; the connection beam is arranged between each two pre-stress beams; a guide pipe is pre-embedded at the middle part of each connection beam; steel pipe piles infiltrated into the foundation are arranged inside the guide pipes; and the steel pipe piles and the guide pipes are poured with high-strength mortar. The cylindrical structure and pile group combined type offshore wind turbine foundation provided by the invention not only has the advantages of strong horizontal force resistance and vertical force resistance of a cylindrical foundation, but also has the advantage of good foundation liquefaction of a pile foundation. Meanwhile, with the adoption of the structure, the onshore scale prefabrication and the offshore floating transportation of a cylindrical structure can be realized; and the offshore construction time and the construction difficulty can be reduced. Therefore, the wind turbine foundation has very high economical benefits.

The invention discloses a rabbit ear type assembling and mounting process for offshore wind driven generation units, which includes the following steps of firstly, assembling a cabin, a hub, a first blade and a second blade to form a rabbit ear type cabin; secondly, conveying the rabbit ear type cabin and a third blade to a mounting location through a transport ship; thirdly, hoisting a tower to the mounting location by a main crane on the transport ship; fourthly, hosting the rabbit ear type cabin assembled in the first step to the top of the tower; and finally, hoisting the third blade to the hub through the main crane. The rabbit ear type assembling and mounting process for the offshore wind driven generation units solves problems that existing offshore wind driven generation units are low in mounting efficiency and easy to be affected by wind wave and current, so that offshore construction efficiency is increased greatly and construction cost is reduced.

The invention discloses a floating type offshore wind power assembly platform, which comprises a platform, wherein a left ballast tank, which is higher than the platform, is arranged on a left board of the platform, a right ballast tank, which is higher than the platform, is arranged on a right board of the platform, the platform is provided with a bottom ballast tank, a transportation guide rail is arranged on the platform, a fixed jacklift used for fixing a fan tower drum is arranged between the left ballast tank and the right ballast tank on the platform, a left board side fixing support is arranged on the inner side of the upper part of the left ballast tank, a right board side fixing support is arranged on the inner side of the upper part of the right ballast tank, a fixed lifting bracket used for fixing the fan tower drum is arranged between the left board side fixing support and the right board side fixing support, and cranes are both arranged on the left bulkhead and the right bulkhead of the platform. The floating type offshore wind power assembly platform has the advantages of large structure size and good stability, and can normally work under a certain storm condition; furthermore, the offshore construction difficulty is reduced, the construction period is shortened, the flexibility of construction is improved, and different schemes can be adopted for installation according to different wind field conditions.

A gangway apparatus (10) for transfer between vessels or between a vessel (38) and a fixed structure such as an offshore construction or a quay is disclosed. The gangway apparatus (10) includes a gangway component (16) which is preferably buoyant and may be inflatable. The gangway component (16) is mounted on a skate or bogie and traverses a fixedly mounted runway (14). The runway (14) may be inclined. Control means are provided for controlling the motion of the gangway component on the runway. These may include biasing means such as a counterweight. The apparatus is preferably mounted in a shipping container such as a 40′ ISO container.

The invention discloses a portable small ocean bottom seismograph. The seismograph comprises: a plastic apparatus capsule, an electric corrosion releasing mechanism and a sink coupling frame. An acoustic pressure sensor is arranged on a top of a glass cabin ball. An all-attitude high frequency detector, an acoustic communication module, a wireless beacon machine, a GPS, an electronic compass and a power supply is arranged in the glass cabin ball. The sink coupling frame is a pedestal. By using a bonding mode of the all-attitude high frequency detector, an internal space can be greatly saved. An attitude adjustment operation of an internal seismometer can be simplified. Single point connection under the ball is used as a decoupling way so that installation is easy and a structure is stableand reliable. A diameter of the glass cabin ball of the ocean bottom seismograph in the invention is 13 inches. A volume is small and weight is light. Cost is low. The internal structure is compact. An offshore construction is convenient. The apparatus possesses a high resonant frequency. A working frequency is 300Hz. The seismograph is suitable for fine seabed geology structure detection. The three-component high frequency detector and the acoustic pressure sensor can cooperate with various kinds of artificial seismic sources so as to carry out high-efficient and high-density seismic detection and geology investigations.

In one preferred form of the present invention, shown in FIG. 1, there is provided a high tonnage winch system (10) for use in offshore construction, transport and docking operations. The winch system (10) includes a winch (14) and a first arrangement (12) supporting the winch (14). A second arrangement (18) is provided for being mounted to a foundation structure in the form of a deck (20). The first arrangement (12) advantageously comprises a first low profile arrangement (16). The second arrangement (18) advantageously comprises a second low profile arrangement (24). The winch system (10) advantageously includes a low profile roller element bearing (26) connecting the first and second arrangements (12), (18) and allowing rotation of the winch (14) about the second arrangement (12), when the winch (14) is connected to the first arrangement (12) and the second arrangement (18) is mounted to the deck (20). The second arrangement is mounted to the deck (20) using high tonnage winch grillage (22).

The invention provides an offshore convertor station for a flexible direct-current power transmission system. The offshore convertor station comprises a closed upper structure and a foundation structure used for supporting the upper structure; the upper structure comprises a large-space main workshop and a small-space auxiliary workshop which are arranged side by side; the main workshop is dividedinto an upper layer and a lower layer, wherein the upper layer is provided with a current-limiting reactor, direct-current field equipment, a converter transformer, high-voltage switch equipment, a workshop electricity utilization system and an emergency diesel engine, and the lower layer is provided with a converter valve and a bridge arm reactor; the auxiliary workshop totally comprises six layers, the first layer is provided with a seawater pump room and valve cooling equipment, the second layer is provided with seawater treatment equipment, the third layer is provided with a valve controlroom, the fourth layer is provided with firefighting equipment, the fifth layer is provided with positive-pressure ventilation equipment, and the sixth layer is provided with a station control room;and the upper structure is overall symmetrically arranged, the foundation structure is a guide pipe frame, and a channel allowing a barge to enter or go out is reserved in the middle of the foundationstructure. The offshore convertor station has the characteristics of being compact and reasonable in arrangement, safe and reliable in operation and suitable for marine environment conditions and offshore construction.

The invention provides a suspended marine power transmission device and belongs to the field of renewable energy sources. The structure of the device is different from that in an existing marine power transmission technology in the world, and the technology of the device is a brand-new technology. The device comprises a power transmission tower, a soft cabin platform, a soft hard cabin connecting column, a ballasted hard cabin, a soft cabin mooring anchor chain, a hard cabin mooring anchor chain, a piled anchor and a central piled anchor, wherein the soft cabin platform is a carrier of a power transmission wire and the power transmission device, and the displacement of the soft cabin platform is more than the total weight of loads; the ballasted hard cabin has a balance effect on the structure, so that the power transmission tower cannot tilt; the anchor chain is pulled tightly under the traction effect of ascending buoyancy of the soft cabin platform, so that the soft cabin platform cannot drift; as the soft cabin platform is arranged in relatively deep water and has a certain anti-heaving effect, the soft cabin platform cannot be influenced by sea wave disturbance; the power transmission tower cannot excessively swing and is used for power transmission like that on land. According to the device, the difficult problem of power transmission for construction of large-sized ocean and wind farms is solved, so that the device has very high promotional and useful values.

The invention relates to an operation method of an anchoring type operating vessel when crossing over a submarine facility during anchoring. The method adopts the following operation steps: step one, distributing and installing a plurality of clamps at intervals in the set positions for the anchor ropes in advance when the anchoring type operating vessel reaches an offshore construction operation field and before the anchor ropes are positioned into water; step two, installing a plurality of floating camel structures in the set positions for the anchor ropes through the respective connecting retaining rings; step three, after completing the installation of the floating camel structures in the set positions for the anchor ropes, positioning the anchor ropes into water. The operation method has the advantages that the operation is simple, the maintenance is convenient, the anchor ropes positioned above the submarine facility can be in the suspension state and not in contact with the submarine facility while the construction cost is reduced, thereby avoiding the damage from the anchor ropes to facilities such as submarine oil pipelines and submarine cables around the prior offshore production platform, so that the submarine facility can be protected safely and effectively; simultaneously, the safety factor of underwater operation and the overall construction safety are improved.

The invention relates to the field of offshore construction, in particular to an offshore wind power construction maintenance window region selecting method based on wind wave prediction. The offshore wind power construction maintenance window region selecting method based on the wind wave prediction comprises the steps of firstly, making offshore wind power construction maintenance operation to be modular process operation; secondly, selecting and calculating sensitive meteorological factors and sensitive ocean factors of the offshore wind power construction maintenance operation, then utilizing the relation between all offshore wind power construction maintenance operations and the sensitive meteorological factors and sensitive ocean factors corresponding to the offshore wind power construction maintenance operations to establish a decision tree model; finally, utilizing the decision tree model and a probabilistic method to select a suitable offshore wind power construction maintenance window region. The offshore wind power construction maintenance window region selecting method based on the wind wave prediction can systematically and scientifically select an operation window region, optimize offshore operation construction and operation process, ensure construction safety, improve efficiency, optimize resource configuration and greatly reduce the construction cost.

The invention relates to an overall reinforcement binding and hoisting construction method and construction device adopting upstroke movable scaffolding. Concrete is poured in the position of a reinforcement cage in an external formwork to form a box girder; the poured box girder is subjected to construction procedures including equal-strength curing, tensioning, grouting and anchor sealing; meanwhile, a mold is arranged on the box girder poured in a former hole, and the reinforcement cage is bound on the mold in the longitudinal direction. Then the upstroke movable scaffolding passes a hole and moves the a next span, after adjustment in position, the reinforcement cage is conveyed to the upstroke movable scaffolding from inside of the mold and is hoisted to the external formwork through a hoisting device to realize synchronous operation, and the construction period for each hole can be shortened by about 5 days. Compared with the traditional construction process, the requirements for large span, large tonnage and high clearance are met, and the construction method and the construction device are also applicable to conditions that gantry crane traveling tracks cannot be arranged below a bridge surface for offshore construction and the like.

The invention discloses a construction method for prefabricating a composite structure of a pier mounting plate pile under an open marine environment. Layers of walings are arranged; cofferdams formed by steel plate piles are arranged at the peripheries of the walings, and prefabricated piers are hoisted in the cofferdams. Therefore, offshore construction risk can be reduced; the construction efficiency is improved; a dry construction environment is provided for pier installation and node concrete construction; installation of a prefabricated cushion cap is affected by stormy waves due to operation under the open marine environment; after the method is used, the offshore operation time can be effectively prolonged, and all-weather construction can be achieved.

This application discloses a "pile first method" interpolated jacket foundation construction system for an implantable rock-socketed pile. The construction system comprises a steel pile casing, a steel pipe pile prefabricated with pile core bottom sealing concrete and a jacket; the steel pile casing is sank to a preset position, the steel pipe pile prefabricated with the pile core bottom sealing concrete is implanted in the inner side of the steel pile casting, and a first annular space among the bottom of the steel pipe pile, the steel pipe pile and a rock-socketed hole wall and a second annular space between the steel pipe pile and an overburden layer are both prefabricated with grouting pipelines; and after the first annular space and the second annular space are grouted, the tip part of a pile leg column of the jacket is inserted into the steel pipe pile and fixedly connected with the steel pipe pile, and a third annular space is prefabricated with a grouting pipeline. This systemproposes to pre-pour pile core the concrete to seal the bottom in the pile before the steel pipe pile is shipped, the construction risk is reduced, a offshore construction window is saved, the construction quality of the pile core concrete and the grouting construction quality of a rock-socketed section are ensured, and at the same time, the grouting quality of the rock-socketed section is ensured.

An ocean platform block offshore double-boat integral migration method includes the steps: firstly, preparing migration; secondly, separating a guide pipe frame from a block; thirdly, approaching two common tugboats to two sides of the guide pipe frame in place; fourthly, abutting the tugboats; fifthly, transferring the weight of the block onto the two common tugboats from the guide pipe frame; sixthly, moving the tugboats backwards; seventhly, aligning the positions of the two common tugboats and a towage barge; eighthly; transferring the weight of the block onto the towage barge from the two common tugboats; ninthly, enabling the two common tugboats to deviate from a towage barge; tenthly, aligning the positions after the block is hauled to a sea area to be provided with the block; eleventhly, abutting the block; twelfthly, transferring the weight of the block onto the two common tugboats from the towage barge; thirteenth, abutting a block leg and a newly built guide pipe frame and transferring the weight; fourteenth, moving the tugboats backwards to finish disassembly and assembly of the integral block. A disassembled platform can be transferred only by the aid of the two common tugboats, and offshore construction amount is greatly reduced.

The invention discloses perpendicularity control process for a single-tubular-pile foundation of an offshore intertidal wind farm. The perpendicularity control process includes steps of controlling manufacture of a single-tubular-pile steel structure; controlling pile sinking; and adjusting the perpendicularity of a foundation pile according to actually measured inclination data of a flange on the top of the pile. The perpendicularity control process for the single-tubular-pile steel structure, without a transitional section, of the foundation of the offshore intertidal wind farm, the problem that the perpendicularity is higher than 2.75% during construction of a foundation of a wind farm in an intertidal zone by the aid of conventional process, construction of the single-tubular-pile steel structure without the transitional section becomes a feasible scheme in China, and offshore construction efficiency is greatly improved.

The invention relates to an auxiliary lifting pontoon and a method for lifting an underwater object by using the same. The auxiliary lifting pontoon comprises a pontoon main body with two closed ends, wherein the pontoon main body comprises a cylindrical middle cabin section and two side cabin sections; the two side cabin sections are arranged at the two opposite ends of the middle cabin section; and a cavity of the middle cabin section and cavities of the side cabin sections are partitioned from each other. A first lifting lug and a second lifting lug are respectively arranged on a first side and a second side of the pontoon main body, wherein the first side and the second side are opposite to each other. First ports communicated with the cavities are respectively formed in first sides of the two side cabin sections so that the cavities of the side cabin sections can be inflated and deflated. Second ports communicated with the cavities are respectively formed in the side walls of second sides of the two side cabin sections so that water can flows in or out of the cavities of the side cabin sections. Through an underwater lifting function of the auxiliary lifting pontoon, the underwater object to be lifted, such as a single point mooring system and the like, can be lifted to am appropriate water depth for air downhole maintenance operation; therefore, the operation efficiency can be increased, the influence of wind waves can be reduced, the safety in construction can be enhanced, and offshore construction time and cost can be also reduced.

A crossing protector for a submarine pipeline comprises round tubes, supports, sinking-proof plates, limit fasteners, pipe clamps, rubber pads, and seal plates. The crossing protector is bilateral symmetry. Two round tubes are located right above an original pipeline. Each round tube is covered with one rubber pad, and the round tubes are connected through the supports. Other two round tubes are located below the two top round tubes respectively and are connected through the supports respectively. An area of each bottom outer round tube, which contacts with a newly laid pipeline, is covered with one rubber pad. The bottom of each bottom outer round tube is level to that of the corresponding bottom inner round tube, and the bottom outer round tube is connected with the bottom inner round tube through the I-steel bottom support, and one sinking-proof plate is disposed at the bottoms of the bottom outer round tube and the bottom inner round tube. The crossing protector does not contact with the original pipeline, so that gravity of the crossing protector and gravity of the newly laid pipeline cannot be transferred to the original pipeline, the original pipeline is protected to the maximum extent, and risks in construction and production are also avoided. In addition, the crossing protector can be mounted by single lifting, so that offshore construction amount and construction cost are reduced greatly.

The invention provides an S-shaped laying method of double-layer submarine pipelines. The S-shaped laying method includes the following submarine pipeline laying steps that 1, start laying work is conducted on the double layers of submarine pipelines; 2, normal laying work of the double-layer submarine pipelines is conducted; 3, laying work of the double-layer submarine pipelines is ended. According to the S-shaped laying method of the double-layer submarine pipelines, when offshore construction work is conducted on the double-layer submarine pipelines, an inner pipe provided with a heat preservation layer is introduced into a work line, the sequence of fed pipes in the work line is adjusted, the workload of welding the inner pipe is reasonably allocated and completed by two work stations, and the offshore laying rate of the double-layer submarine pipelines is greatly raised; besides, offshore construction cost is also saved, and the risk of offshore construction is lowered.

The invention provides an offshore wind power generation tower foundation and structure and an installation and construction method thereof. The offshore wind power generation tower foundation comprises a central pile and a plurality of satellite piles surrounding the central pile; a central structure node is arranged on the top of the central pile, while satellite structure nodes are arranged onthe tops of the satellite piles; components are connected between the central structure node and the satellite structure nodes and between the satellite structure nodes so as to form an offshore structure layer; a central column is arranged right above the top of the central pile, the central pile and the central column are connected by virtue of a structure node; a first structure node is arranged below the top of the central column, the first structure node and the satellite structure nodes are connected through an inclined column or an inclined cable so as to form a space symmetric structure of the wind power generation tower; and a second structure node is arranged on the top end of the central column, and is provided with wind power generation equipment. According to the invention, the functions of the tower are maintained, the cost of the tower is reduced, and the offshore wind power generation tower is installed and constructed in a shoal water or still water area which easily causes the stranding of a construction ship, by combining the existing conventional offshore construction equipment.

The invention provides a flexible flushing protective structure for marine engineering infrastructure. The flexible flushing protective structure comprises a plurality of protective units and connecting cables, wherein the protective units are connected by the connecting cables to form a flexible flushing protective surface laid on the seabed surface; and the flexible flushing protective surface is provided with a cavity formed in an up-and-down penetrating mode. The flexible flushing protective structure can intercept passing sediment driven by the ocean current and the passing sediment is stabilized around the protected structure, so that a new flushing balance state is formed around the protected structure, the flushing protection is formed, the stability of the structure is protected,and the flushing protective effect is good; moreover, the shapes of the protective units can be maintained for a long time and the service life of the entire flexible flushing protective structure isensured; and the protective units are prefabricated on land, and the efficiency of offshore construction is improved.

The invention relates to an on-sea construction ship worker positioning management system comprising a ship monitoring system, a worker monitoring system and a ground command system, wherein the worker monitoring system comprises a card reader and an industrial control computer that are installed on a ship, the card reader is used for reading information of labels worn by workers and sending the information read by the card reader to the industrial control computer, the industrial control computer is used for sending information read by the card reader to the ground command system, and the ship monitoring system is used for sending ship positioning data and basic ship information to the ground command system; the ground command system is used for receiving the information read by the card reader, the ship positioning data and the basic ship information so as to form on-sea construction ship worker positioning information. Via the on-sea construction ship worker positioning management system and method, convenience of management can be realized, positions and conditions of construction ships and workers can be grasped in real time, construction safety can be ensured, ship machine and worker safety can be ensured via capability of mobilizing resources at any time, and efficiency can be raised.

The invention discloses an offshore wind power generator set waterborne four-pile foundation, which comprises four pipe piles and a support platform, wherein the center of the upper part of the support platform is provided with a connecting pipe pile, the lower part of the support platform is provided with pipe inserting heads corresponding to the four pipe piles, after the assembly, the pipe inserting heads are inserted into the upper ends of the pile pipes, in addition, concrete is poured in the pipe piles, the manufacturing of the pipe piles, the support platform and the like is completed in factories, only simple works such as piling and welding are needed in the construction site, the underwater operation is converted into the waterborne operation, the offshore construction period is reduced, the pipe inserting heads and the pipe piles adopt insertion connection modes, the leveling is easy, the construction difficulty is reduced, the structure is light and ingenious, the cost is low, the transportation is convenient, the transportation cost is reduced, and the dismounting is convenient after the service life period.