66 results about "Offshore construction" patented technology

The application relates to an actuator of a quick-response and high-precision telescopic positioning system, the electromagnetic valve comprises a valve body, a valve core and a spring, and the electromagnetic valve comprises a base platform, a hydraulic cylinder and an electromagnetic valve, and further comprises a control system and a protection system; the control system judges and levels the inclination of the base platform through a horizontal judging mechanism and a power-on control module; the protection system provides multiple protections for the lifting of the base platform through an induction module, a backup control module and a backup locking valve. Due to the adoption of the above technical scheme, the inclination of the offshore base during the construction process is reduced to a certain extent, so that the safety of offshore construction is ensured to a certain extent.

This invention discloses an autonomous vessel and a method for maintaining a precise position or trajectory during offshore operations (e.g., cable or pipe laying or offshore construction installation). The vessel includes multiple externally anchored mooring lines, a winch system with tension sensors, a position sensor, and a control system. The control system processes position and tension data to detect deviations caused by environmental forces such as wind, waves, or ocean currents. In response, the control system activates the winch system to adjust the length of the mooring lines, counteracting forces caused by different environmental factors and achieving controlled maneuvering within the mooring area. An optional artificial intelligence module can learn from historical data to predict dynamics and optimize adjustments along predetermined waypoints. Compared to traditional dynamic positioning systems, this reduces fuel consumption, improves accuracy, and minimizes risk. It is applicable to vessels such as barges or installation platforms.

The utility model relates to the technical field of cofferdam construction, in particular to a measurement auxiliary instrument for cofferdam offshore construction. The device comprises a GPS measuring rod, a stabilizing support used for stabilizing the GPS measuring rod and a lifting rope with the free end fixedly connected to the support, and the fixed end of the lifting rope is fixedly connected to a winding mechanism used for winding the lifting rope. The device is simple to manufacture, can be repeatedly used, is convenient to mount, dismount and use, and has better durability; the GPS measuring rod of the device can stably stay on the upper surface of the thrown and filled stone, the GPS measuring rod is prevented from deviating from the measuring position due to underwater surge, and then the precision of measuring the riprap elevation is improved.

The invention discloses a submarine pipeline novel repair technology construction multifunctional dragging head which comprises a shell, a pull rod and a tension sensor, the shell comprises a first shell body, a second shell body, a third shell body and an inner shell body, the two ends of the second shell body are connected with the first shell body and the third shell body respectively, the inner shell body is arranged in the first shell body, the inner shell body is in a hemispherical shape, and the pull rod is arranged in the inner shell body. An inner cavity of the first shell is in a hemisphere shape matched with the inner shell, the inner shell can slide in a hemisphere shape relative to the first shell, the first shell and the inner shell are provided with through holes corresponding to the pull rod, the pull rod stretches into the inner shell through the through holes and is rotationally connected with the inner shell, a tension sensor is arranged in the second shell, and the third shell is connected with the tension sensor. According to the invention, in offshore construction and simulation test scenes, the multi-elbow complex-path subsea pipeline can be adapted, in-pipe visual detection and dragging tension data acquisition are synchronously realized, and support is provided for operation safety assessment, process optimization and fault pre-judgment.

The invention provides an offshore bottom water thin mutual reservoir fracturing parameter design method, and relates to the technical field of oil and gas exploitation, the method comprises the following steps: S1, determining vertical distribution of a reservoir section mud layer, a sandstone layer and a water layer according to logging data, and establishing a target well section crustal stress and rock mechanics profile; s2, acquiring the fracture toughness of rocks with different shale contents under different stresses to obtain a corrected fracture toughness profile; s3, according to the fracture half length, the fracturing displacement, the critical mudstone layer penetrating thickness corresponding to the fracturing fluid viscosity and the penetrating layer fracture height of the reservoir are initially calculated, and parameters needed for avoiding a water layer and fully transforming a thin interbed are obtained; s4, according to the fracture flow conductivity, the sand amount and the sand-carrying fluid amount are calculated initially; s5, the liquid efficiency is determined according to block fracturing historical data, the prepad fluid proportion range is initially calculated, and the prepad fluid amount is calculated; and S6, optimizing parameters through numerical simulation, and determining final fracturing parameters and a pump injection program. According to the method, the requirements of geological and offshore construction can be met, and the optimal fracturing scheme and the optimal pumping program can be rapidly determined.

This invention relates to the field of marine engineering safety early warning and intelligent prediction, and in particular to a point-to-area short-term wave height prediction method and system for offshore construction early warning. The invention takes historical pattern wave height, historical reference monitoring wave height, and future pattern wave height of a measurement point as inputs. It constructs a short-term prediction model based on a Transformer encoder and introduces a joint loss function including absolute error, large value underestimation penalty, trend asymmetry, residual, and peak time terms to automatically output the future correction results for each measurement point. Then, based on the mapping relationship between the measurement point and the corresponding coverage area, the correction results of the measurement point are extended to the entire target area to form a corrected wave height field. Combined with construction thresholds, it automatically determines the levels of normal, attention, alert, and work stoppage. Without requiring continuous manual interpretation, it forms a complete closed loop from data acquisition, regional analysis, prediction, regional correction to graded early warning and result storage and push.

The application discloses a marine photovoltaic construction ship, comprising a ship body, a marine crane arranged on the ship body, a pile sinking positioning frame positioning tool arranged on the ship body and having a tool positioning groove for positioning each anti-sinking plate of the pile sinking positioning frame, a foundation pile positioning tool arranged on the ship body and having a foundation pile positioning groove for positioning the foundation pile, and a photovoltaic unit positioning tool arranged on the ship body and having a support leg positioning cylinder for positioning the support leg of the photovoltaic unit. The application can hoist the foundation pile, the pile sinking positioning frame and the photovoltaic unit by itself at a wharf without setting a ship loading crane. After arriving at a marine construction site, the marine photovoltaic construction ship can replace a floating crane to perform the pile sinking operation of the foundation pile. The marine photovoltaic construction ship provided by the application has the functions of a ship loading crane, a transport ship and a construction ship, reduces the number of construction ships and lowers the construction cost.

The present application belongs to the field of offshore construction, and relates to a self-elevating offshore auxiliary pile pulling platform, which comprises a platform ship system, a counterweight system and a pile pulling system. The platform ship system comprises a ship body, a bow and a stern. A pile leg is arranged through the ship body, and a pile shoe is arranged at the bottom of the pile leg. A platform posture monitoring device and a pile leg lifting control device are arranged on the ship body. A cabin is arranged in the ship body, and the counterweight system is arranged in the cabin and comprises rails, flat cars, counterweights and a crane. The pile pulling system comprises a pile pulling platform module, which is connected to the stern through a hydraulic push-pull device. A pile pulling mechanism is arranged on the pile pulling platform module, which performs pile pulling operation on the pile foundation. A pile pulling cooperative control center can collect parameters such as pulling force and pulling speed in real time during the pile pulling process, and can adjust the pulling speed of the auxiliary pile pulling operation to be consistent with the pulling speed of the main offshore self-elevating operation platform, so as to maximize the pile pulling effect while ensuring the safety of the pile pulling platform and the operation platform.

The application relates to a method for installing and constructing an offshore wind turbine jacket, which can quickly determine whether the jacket is blocked during lowering by judging whether the sling is not stressed, the jacket is not lowered to the design elevation or the jacket is inclined; if the jacket is blocked, a tugboat is controlled to apply a transverse force to the low point of the jacket, so that the lateral extrusion surface of the pile wall of the pile of the insertion tip and the foundation pile is directly separated, the static friction balance is broken, and the gap between the insertion tip and the pile wall is enlarged; the main hook synchronously applies a vertical lifting force, and the jacket is quickly pulled out of the blocking position after the gap is formed. The combined effect of the lateral separation and the vertical pulling of the application can more efficiently break through the blocking threshold, reduce the hard friction damage between the pile wall and the insertion tip, and shorten the unblocking time. The scheme of the application uses two types of conventional offshore construction equipment, i.e., a crane ship main hook and a tugboat, without the need of customizing special devices, and the cooperative operation of the tugboat and the crane ship does not need complex linkage control, so that the equipment investment cost is reduced.

The application discloses a kind of sea survey operation platform devices, it is related to offshore construction surveying technical field, including engineering pile, ladder and surveying column, the bottom end of the engineering pile is provided with flat link, the top of the engineering pile is installed with stiffened plate, the top of the engineering pile is installed with contact beam, and multiple crawling crossbars are installed in the inner wall of contact beam, the upper walkway is arranged above the contact beam, the top of the engineering pile is installed with surveying column, the top of the surveying column is provided with fixed slot, the top of the surveying column is provided with forced counterweight disc, and mounting bracket is welded on the outer wall of forced counterweight disc, the inner wall of mounting bracket is provided with mounting mechanism for fixing, the middle position of forced counterweight disc is provided with air slot, the device is rotated positioning bolt through work type frame and extends to mounting bracket position, and then forced counterweight disc is fixed at surveying column, so as to be convenient for quick installation and fixing, save installation time.

An autonomous vessel and method for maintaining precise position or trajectory during marine operations, such as cable or pipe laying or offshore construction and installation, are disclosed. The vessel includes multiple mooring lines anchored externally, a winch system with tension sensors, a position sensor, and a control system. The control system processes positional and tension data to detect deviations caused by environmental forces like wind, waves or currents. In response, it actuates the winch system to adjust mooring line lengths, counteracting forces and enabling controlled maneuvering within the mooring spread. An optional artificial intelligence module learns from historical data to predict dynamics and optimize adjustments along predefined waypoints. This reduces fuel use, enhances accuracy, and minimizes risks compared to conventional dynamic positioning systems. Applicable to vessels like barges or installation platforms.

The invention provides an offshore construction umbilical cable dragging head protection frame, and relates to the technical field of offshore construction, the offshore construction umbilical cable dragging head protection frame comprises a reinforcing table top, the bottom of the reinforcing table top is fixedly connected with a supporting stand column, and the reinforcing table top is of an arc-shaped structure so as to be matched with a large reel pipe disc loaded by an engineering ship. The reinforcing table board is designed to be arc-shaped so as to adapt to a large reel pipe disc loaded by an engineering ship. Through cooperation of the reinforcing table board and the supporting stand column, a storage space is reserved for the umbilical cable dragging head, so that the umbilical cable dragging head is protected and is prevented from being extruded by the umbilical cable in the processes of inverting, transporting and laying the umbilical cable, the umbilical cable is evenly distributed in the cable winding disc and is not prone to being damaged, and stable transportation of the umbilical cable dragging head is guaranteed. Meanwhile, an umbilical cable pre-debugging worker can test and monitor the light reflection time domain, conductor resistance, insulation resistance and the like of the umbilical cable dragging head in the loading, transporting and laying period of the umbilical cable, and the problem that in the prior art, testing can only be carried out after laying is completed is solved.

A noise abatement system for offshore construction may include a foundational pile configured for disposition in a floor of a body of water, an array of piles configured for disposition in the floor of the body of water around the foundational pile, and an array of inflatable balloons coupled to the array of piles and disposed in the body of water. The array of piles may be configured to attenuate sound in the floor of the body of water and the array of inflatable balloons may be configured for disposition around the foundational pile and configured to attenuate sound in the body of water.

This utility model discloses a pipe pile for the construction of offshore photovoltaic support modules, relating to the field of offshore photovoltaics. The pipe pile for offshore photovoltaic support module construction includes a precast pipe pile, a precast pipe pile head sealing plate, and pipe pile components mounted on the precast pipe pile head sealing plate. Before driving the precast pipe pile, embedded components are welded to it, eliminating the need for welding embedded components at sea, improving construction efficiency, reducing construction costs and risks in offshore construction. Separating the supports increases the adjustment space in offshore construction. The photovoltaic support module is installed by connecting its four corner points to the supports on four embedded components, with the supports on the embedded components corresponding to adjacent photovoltaic support modules, achieving shared piles and significantly reducing the number of precast pipe piles used.

The invention is suitable for the technical field of ocean engineering, and provides a ship offshore construction positioning method which comprises the following steps: acquiring the current operation environment of a workboat; performing safety assessment on the current working environment, and determining whether the current working environment meets the laying working environment; when a laying operation environment is met, the underwater acoustic positioning beacons and the corresponding bases are lowered to a target seabed implantation point through laying equipment; after the underwater acoustic positioning beacon is arranged at the target seabed implantation point, acoustic response coupling is carried out on a shipborne underwater acoustic positioning system of the workboat and the underwater acoustic positioning beacon to obtain relative positioning data of the workboat relative to the underwater acoustic positioning beacon, and the relative positioning data serve as redundancy or replacement positioning information of a satellite positioning system of the workboat. The problems that an existing satellite positioning system has limitation, is prone to signal drifting or failure, is prone to interference of platform protrusions, or generates electromagnetic and acoustic interference with equipment such as an underwater robot, and consequently positioning data are not reliable are solved.

The invention provides a small floating platform for nearby control of an underwater production system of a marginal gas field, which comprises a top platform, a support column and a bottom ballast tank, the top platform is arranged at the top end of the support column, and the bottom ballast tank is arranged at the bottom end of the support column. The method has the beneficial effects that the movable small floating platform is adopted and arranged at the wellhead nearby, the length of the umbilical cable is shortened from the kilometer level to the hectometer level, the material cost, the manufacturing cost, the laying cost and the maintenance cost of the umbilical cable are remarkably reduced, the offshore construction period is shortened, and the economic benefits of marginal gas field development are effectively improved. On the basis, the problems of control signal delay, attenuation of hydraulic pressure and medicament injection pressure and the like caused by long-distance transmission can be avoided, the response speed, stability and reliability of a control system are greatly improved, and the method is particularly suitable for economic and efficient development of offshore marginal gas fields which are far away from a main gas field and are limited in reserves and distributed dispersedly.

The invention discloses a risk dynamic prediction method, system, medium and equipment for offshore construction, and belongs to the field of offshore construction safety prediction.The method comprises the steps that laser point cloud time series data of offshore wind power construction components and meteorological environment monitoring data including wind speed, wind direction, wave height, tide level, flow velocity and rainfall are collected; constructing a component error time sequence and a meteorological environment time sequence which are in time alignment; inputting the two sequences into a preset risk prediction model, extracting component error features layer by layer through a multi-stage time sequence convolutional network, performing weighted correction on the features by using meteorological environment sequence fragments in a corresponding time view in each layer, and transmitting the corrected features layer by layer; and predicting an error of the component in a future preset time period based on the final layer feature regression, and outputting a risk prediction result in combination with a preset risk judgment rule. By implementing the method, the problem that risk prediction is lagged and inaccurate in the offshore wind power construction process in the prior art can be solved.

This invention discloses a mud circulation device and method for bored piles in deep-sea aquaculture areas, belonging to the field of offshore construction engineering. It includes: a first supporting steel pipe, multiple first supporting steel pipes fixed to the seabed by a vibratory pile driver; a construction platform detachably connected to the first supporting steel pipes; a bored pile driver installed on the construction platform; a steel casing installed adjacent to the construction platform, with its bottom fixed to the seabed and its top extending above sea level; and a mud circulation mechanism floating on the sea surface near the construction platform, connected to the mud flow channel and the steel casing. This invention solves the problem of bored pile drivers being unable to operate at sea. It utilizes a mud separator to separate the waste slurry generated during offshore bored pile operations into mud, filtrate, and solid waste. The solid waste is transferred for treatment, the filtrate is discharged into the sea after passing pH testing, and the mud can be recycled, reducing the cost of mud usage. This method has green, environmentally friendly, energy-saving, and emission-reducing effects in aquaculture areas.

The present application relates to the offshore fixed platform foundation construction technical field, specifically relates to a kind of offshore jacket rock-socketed pile construction control method, including based on site geological survey data evaluation outer pile into rock depth range;According to the dynamic difference of real-time curve in the process of outer pile sinking and preset standard curve, the decreasing gradient of hammering energy is adjusted according to preset strategy;When jacket leveling, the residual bending deformation of outer pile exceeding preset threshold is corrected;PBA drill is laid in the interior of outer pile, and drilling, inserting inner pile and grouting material are sequentially completed, the risk control of three links of outer pile rock-socketed, jacket leveling and pile drilling is integrated into the same technical system in the present application, using the construction logic of "design evaluation-real-time monitoring-dynamic adjustment-closed loop control", the safety, quality and efficiency of offshore construction are improved, which helps to improve the construction performance of contractor under the actual working conditions such as weak management and control of integrated service provider, difficult coordination of multiple service providers and insufficient experience of self-execution team.

The invention relates to the technical field of offshore construction, and discloses an intertidal zone construction transportation device which comprises a base, a track beam, a driving rod and a fixing seat. The bottom of the base is provided with at least one positioning ground nail, and the base is provided with a first anchoring hole penetrating through the top side and the bottom side of the base. The track beam is provided with a second anchoring hole communicated with the inner cavity and the outside of the track beam. The driving rod is connected with a top plate of the track beam. The fixed seat is connected with the driving rod, and an anchor rod is arranged on the fixed seat. The driving rod can drive the fixing base to move downwards, so that the anchor rod penetrates through the first anchoring hole and the second anchoring hole and is inserted into a soil layer. The fixing base is driven by the driving rod to move downwards, the anchor rod on the fixing base penetrates through the first anchoring hole and the second anchoring hole and then is inserted into the soil layer of the intertidal zone, the track beam and the base are fixed, the track beam, the base and the foundation are anchored, multiple functions of positioning, connecting and anchoring are achieved, the on-site operation steps and time are reduced, and the installation efficiency is improved.

The utility model relates to the technical field of offshore construction measurement, in particular to a measuring platform for offshore construction, which comprises a special-shaped mounting disc. The device further comprises an arc-shaped sliding rail, an arc-shaped sliding block, an adjusting grip, a connecting rod, an air guide arc plate, an air cutting plate, a protective fence, a platform panel, a centering steel pipe, a sliding groove, a connecting plate and a limiting block. The arc-shaped sliding rail is arranged at the top of the special-shaped mounting disc. The adjusting grip drives the arc-shaped sliding block to slide along the track of the arc-shaped sliding rail, the connecting rod is in linkage with the wind guiding arc plate and the wind cutting plate to synchronously deflect, the windward side of the wind guiding arc plate is accurately aligned with the wind coming direction, airflow is guided downwards through the curved surface structure of the wind guiding arc plate, and the connecting plate is pushed up and down to drive the limiting block to vertically move in the sliding groove; the connecting plate is locked to the top of the platform panel through the bolts, a rigid connecting system of the centering steel pipe and the platform panel is constructed, the clamping position of the connecting plate is adjusted in real time according to the height of the platform, and the functions of wind resistance and dynamic centering stable adjustment are achieved.

The invention relates to the technical field of offshore bridge construction, in particular to a modular bridge section offshore construction method. Comprising the following steps that S1, water level information and structural information of an existing building, a bridge section module and a pontoon are obtained, and the existing building is provided with an installation position; s2, according to the structure information and the water level information, simulation operation is conducted on the pontoon loaded with the bridge section module at the high water level, and the bridge section module is installed on the installation position in a simulation mode when the water level drops; s3, determining an installation path and a water level installation window; and S4, installing a window based on the installation path and the water level, and installing the bridge section module through a pontoon. According to the method, firstly, through the obtained water level information and the structure information of the existing building, the bridge section module and the floating pontoon, it is ensured that the construction scheme is matched with the actual working condition;

The invention relates to the technical field of nuclear power station drainage facilities, in particular to a bedrock pretreatment construction method which comprises the following steps that a construction platform is prepared, a vibratory hammer is arranged on the construction platform, and a steel pipe pile is connected to the vibratory hammer; repeatedly carrying out multiple times of stratum cutting on the bed rock according to a specified sequence in the specified area; the designated area comprises a jacking area and an external expansion area, the position and the area of the jacking area are matched with the position and the area of the jacking hole, and the external expansion area surrounds the outer side of the jacking area; the appointed sequence comprises diffusion from the center of the jacking hole to the periphery of the jacking hole; the stratum cutting comprises the steps that the steel pipe pile is driven into the bedrock by a specified depth through a vibratory hammer, and the steel pipe pile is pulled out to form a pile hole in the corresponding position of the bedrock. The method can overcome the defects that in the prior art, when bed rocks above the drainage stand pipe comprise rocks, a large offshore construction platform needs to be used for offshore punching and medium-coarse sand replacement and filling operation, so that the construction cost is increased, and the construction period is delayed.

This invention relates to the field of offshore construction platform technology, and discloses a high-pile wharf offshore construction platform and its construction method, including a working platform; a positioning and installation assembly, in which four positioning piles are respectively installed in the water foundation, each positioning pile containing a primary positioning element, and at least four secondary positioning elements are installed on the working platform, the working platform being positioned and connected to the positioning piles through the primary and secondary positioning elements, and an installation component being installed on the working platform and limited to the shore ground; an adjustment assembly, including an adjustment component and at least four buoyancy components, the four buoyancy components being respectively installed at the bottom of the working platform and corresponding one-to-one with the four primary positioning elements, the working platform floating on the water surface through the buoyancy components, and the adjustment component being installed on the working platform for adjusting the buoyancy of the buoyancy components; and a moving component, installed on the installation component, through which external equipment is moved to the working platform. This invention provides accurate positioning, adjustable buoyancy, and facilitates equipment transportation, and has significant practical implications.

The invention provides a wind generating set, and relates to the technical field of wind power generation, the wind generating set is provided with a joist assembly with a vertical guide structure, so that a generator cabin can be lifted along the axial direction of a tower drum, rigid support is formed through a locking device after the generator cabin is lifted to a preset operation height, and the whole machine yawing function is realized in combination with a yawing rotary table; the distance between the rotating plane of the wind wheel and the tower drum is remarkably increased, the tower sweeping risk of the blades is effectively reduced, the generator cabin can be lowered to the low position and locked before a typhoon comes, the gravity center of the structure and wind load stress are greatly reduced, and safety under the extreme working condition is improved; meanwhile, due to the lifting type design, the wind generating set can complete component installation and maintenance work at a low height, the offshore construction process is simplified, dependence on a large hoisting ship is reduced, the installation and operation and maintenance efficiency is improved, and the whole life cycle cost is reduced.

A marine all-offshore construction ship docking platform system comprises a steel platform fixed to a wharf; the buoyancy tank platform and the steel platform are arranged at an interval, and the buoyancy tank platform is arranged on the water surface in the water area; the crawling ladder is arranged between the buoyancy tank platform and the steel platform, one end of the crawling ladder is hinged to the steel platform, and the other end of the crawling ladder is connected with the top face of the buoyancy tank platform in a rolling mode; the floating box platform is connected to the positioning piles in a sliding mode.

The utility model relates to a kind of underwater interlocking row hoisting device, relate to offshore construction technical field.The underwater interlocking row hoisting device of the utility model includes frame, both ends of frame are equipped with driving assembly and lifting hook assembly, lifting hook assembly includes support, rotating shaft and lifting hook, support is set on frame, rotating shaft is rotatably set on support, lifting hook is set on the surface of rotating shaft, driving assembly is connected with rotating shaft and is used to drive rotating shaft to rotate on support.Utilize driving assembly to drive rotating shaft on support rotation, make the lifting hook set on rotating shaft can change posture, that is, can hook up hoisting rope to ensure that hoisting rope does not fall off, hoisting rope can be conveniently unhooked, diver does not need to carry out underwater unhooking operation, improve the hoisting efficiency and hoisting operation safety of underwater interlocking row.

The utility model relates to a kind of seaweed seedling rope transplanting device and operation method, and it relates to marine ecological restoration technical field.The seaweed seedling rope transplanting device mainly includes supporting walking structure, seedling rope guide frame structure, seedling rope transplanting structure three parts, and the seedling rope transplanting structure includes plough blade assembly, soil covering structure, compaction wheel and other components again;The device is close to seabed surface walking operation by dead weight, with rope belt as medium series binding seaweed artificial seedling or transplanting bundle unit, is sequentially conveyed in C-shaped groove opened by plough blade assembly by guide structure effect, and after burying by soil covering structure and compaction, compaction wheel compaction, completes transplanting operation, it can be assisted by manpower construction, or by ship or raft dragging is carried out automatic large-scale operation, equipment structure is simple, offshore construction operation is convenient, and sea state adaptability is strong, and transplanting unit will not be lost, and transplanting depth standard specification, greatly reduce operating intensity, improve operation efficiency, improve transplanting seedling rate.

The present application relates to nuclear power drainage system construction technical field, specifically to a kind of vertical jacking construction method and construction system, wherein vertical jacking construction method includes the following steps: S1, stratum cutting is carried out to bedrock above jacking hole mouth;S2, using transport system, pipe section is transported to jacking device, jacking device is lowered, and pipe section is placed above jacking device;S3, jacking device is raised, corresponding pipe section is connected with jacking cap, or corresponding pipe section is connected with last pipe section;S4, using stop device, pipe section after jacking is stopped;S5, repeat S2 to S4, until all pipe sections are jacked to specified height.The present application can overcome the deficiency that when bedrock above drainage riser includes rock, large offshore construction platform is needed to carry out offshore punching and medium-coarse sand replacement operation, thereby leading to construction cost increase and construction period delay in prior art.

This invention provides a gravity-based multi-tension-leg floating wind turbine platform, comprising: a wind turbine and its tower, a buoyancy chamber, a tensioning mooring system, and a gravity foundation. The wind turbine and its tower are mounted on top of the buoyancy chamber; the buoyancy chamber is connected to the gravity foundation arranged on the seabed via the tensioning mooring system to form a tension leg restraint system. The tensioning mooring system, by significantly increasing the number and rationally distributing the cables, distributes the platform's tension under the influence of wind, waves, and currents among more tensioning components, thereby reducing the tensile force and fatigue load requirements of a single tensioning mooring member and its end connecting components, and reducing the engineering implementation difficulty caused by excessive stress on the tension legs. The gravity foundation is fixed to the seabed by its own weight, eliminating the need for piling operations required for traditional tension-leg platforms, significantly reducing the difficulty and cost of offshore construction.