197 results about "Offshore construction" patented technology

The invention discloses a risk monitoring and control method for offshore construction, and particularly relates to the technical field of collision control for offshore construction, and the method comprises the steps: obtaining the real-time position, the navigational speed, the course, the tonnage, the wind speed, the wind direction, the wave height, the wave direction, the flow speed, the ship type, the ship historical track and the ship behavior mode of a ship, and carrying out the preprocessing; and inputting the processed multi-source data into the constructed ship trajectory prediction model, outputting a plurality of possible trajectories and trajectory probabilities of a future time window, and then calculating a collision probability and a dynamic safety distance, thereby improving the degree of closeness between the collision probability and a real collision probability, improving the accuracy of collision probability analysis, and improving the accuracy of ship trajectory prediction. The safety boundary of the ship and the construction area is quantified in real time, the failure of a fixed threshold value in a complex environment is avoided, a dynamic judgment reference is provided for risk level classification, the risk identification precision is improved, a response instruction is matched more accurately, and the collision harm is further reduced.

The invention discloses a split type suction pile anchoring foundation and an offshore construction method, and relates to the technical field of ocean engineering, and the split type suction pile anchoring foundation comprises a suction pile structure and a buoyancy tank structure; an apron board structure and a lug plate structure are arranged on the side wall of the suction pile structure; a drainage pipeline penetrates through the top of the suction pile structure and communicates with the interior of the suction pile structure and the water suction pump. A balance weight cabin and a ballast tank are arranged in the buoyancy tank structure, and a pressure discharging and loading system is arranged in the ballast tank; the supporting leg structures are arranged at the bottom of the buoyancy tank structure, and the buoyancy tank structure is pressed on the apron board structure through the supporting leg structures; a first eye plate connected with a mooring rope or a mooring chain is arranged on the outer side wall of the buoyancy tank structure. The technical problems that due to the fact that a traditional suction pile anchoring foundation is limited by the dead weight, the depth of penetrating into soil in the soil conditions such as sandy soil is insufficient, enough pressure difference cannot be generated in the closed space formed by the cylinder wall and soil in the space outside the cylinder wall, and the suction barrel reaches the preset installation depth and the designed tensile strength and the designed pulling strength are solved.

The invention relates to the technical field of offshore construction, in particular to an inclined shallow covering layer batholith seabed steel cofferdam inner support conversion construction method which comprises the steps that S1, steel pipe piles are inserted and driven in a seabed; s2, throwing a sand bag; s3, filling materials; s4, inserting and building a steel cofferdam at the filler; s5, long supports are arranged on the steel cofferdam, and water pumping is conducted; s6, the steel cofferdam is filled with materials, and a concrete cushion layer is constructed; s7, a first-layer bearing platform is constructed, after the strength reaches the standard, a first short support is arranged between the first-layer bearing platform and the steel cofferdam, and then a long support is dismantled; s8, a second-layer bearing platform is constructed, after the strength reaches the standard and anti-corrosion construction is conducted, a second short support is arranged between the second-layer bearing platform and the steel cofferdam, and then the first short support is dismantled; s9, anti-corrosion construction is conducted on the first layer of bearing platform; s10, the steel cofferdam and the inner supporting system are dismantled, and the seabed is cleared. According to the construction method, the loss of steel materials can be reduced, the occupied construction space is reduced, and the problem that cofferdam steel sheet piles are difficult to drive in is solved.

The present invention discloses a method for offshore construction of an extra-large single pile: by using a full-rotation crane vessel, a jack-up pile-stabilizing platform, a set of main hoisting ropes of a balance beam, and a set of auxiliary hoisting ropes of a pile-turning clamp, and adopting the method of single-vessel single-hook stern lifting, the offshore construction of the extra-large single pile is realized. Among them, the main and auxiliary hoisting riggings of the single pile are installed by berthing the transport ship parallel to the crane vessel, and the transport ship is rotated to the stern position convenient for the crane vessel to lift through the main hoisting machine and cable ropes of the crane vessel, so as to realize the lifting, turning over and pile driving of the extra-large single pile, giving full play to the construction flexibility of the crane of an ordinary full-rotation crane vessel and the lifting capacity of the fixed stern lifting of the crane, alleviating the contradiction of the shortage of construction vessels and machinery for extra-large single piles in China, and optimizing the single-pile construction process to improve work efficiency.

The invention discloses a mounting method for an ultra-large bridging hose of an ocean platform, and belongs to the technical field of ocean platform operation. The mounting method comprises the following steps that a trestle is moved to the position between a first ocean platform and a second ocean platform through a workboat, one end of a bridging hose is fixedly connected with a first hard pipe through a flange, and the other end of the bridging hose is detachably connected with a support on the trestle through a blind flange; the drooping part of the bridging hose is detachably fixed on the trestle; the crane of the second ocean platform is used for driving the bridging hose to move in the X direction, the Y direction and the Z direction, so that coarse alignment of the bridging hose and the second hard pipe is achieved; fine alignment of the bridging hose and the flange of the second hard pipe is achieved by adjusting a chain block of a crane, and finally the bridging hose and the second hard pipe are fixed through bolts to complete installation. According to the method, the bridging hose between the platforms can be accurately and quickly mounted, the offshore outboard high-altitude workload is greatly reduced, the construction time is short, and the offshore construction safety is effectively improved.

The invention discloses a split type jacket and skirt pile combined type fan supporting structure, and belongs to the technical field of offshore wind power engineering, the combined type fan supporting structure comprises a first assembly, a second assembly and a supporting assembly, the first direction end of the first assembly is used for being connected with a fan tower barrel, the second direction end of the first assembly can be connected with the second assembly, and the supporting assembly is used for supporting the fan tower barrel. The second direction end of the second assembly is connected with the supporting assembly, and the skirt pile can penetrate through the supporting assembly for pile sinking. The jacket is designed into a split type, so that the processing difficulty, the size of the jacket, the use amount of steel and the weight of a single body are greatly reduced, the rated use amount of a floating crane and the specification requirements of related offshore construction equipment can be reduced, and the purpose of reducing the manufacturing cost and the transportation and installation cost is achieved.

The invention relates to a temporary fixing device for an offshore photovoltaic net rack. The temporary fixing device is suitable for rapid positioning and temporary fixing of a pile foundation in the net rack hoisting process. The device comprises a connecting node, an inverted cone, a shell, a wedge-shaped sliding block and the like, a temporary fixing device is welded to the lower portion of the connecting node, in the net rack hoisting and falling process, the inverted cone achieves automatic positioning under the action of a guide plate, and after the shell enters a pile foundation, the wedge-shaped sliding block automatically pops up and is limited and fixed under the action of a compression spring; the temporary fixation of the upper net rack is realized; the structure is in a pure mechanical mode, manual intervention is not needed, the wind load influence can be effectively resisted, and the hoisting operation efficiency and the offshore construction safety are improved.

The invention discloses a connecting structure suitable for an offshore photovoltaic large platform truss and a steel pile in the technical field of offshore photovoltaic, the connecting structure comprises a large platform truss and a steel pile body, the top of the large platform truss is provided with a photovoltaic module, and the top of the steel pile body is provided with a connecting structure. The large platform truss is connected with the steel pile body through a connecting structure. The large platform truss, the connecting structures and the steel pile modules can be manufactured on the land, the offshore photovoltaic construction efficiency can be greatly improved, the difficulty can be reduced, meanwhile, the construction process can be effectively controlled, the product quality of the structure can be guaranteed, intensive large-scale production can be conducted, and after the structure modules are constructed on the land, the construction cost is reduced. The offshore construction difficulty can be greatly reduced, the offshore construction procedures are reduced, the construction progress is accelerated, the construction period is shortened, and the construction cost is reduced.

The modular offshore photovoltaic system comprises a photovoltaic module, the photovoltaic module comprises a plurality of photovoltaic module units, and the photovoltaic module is positioned in a construction sea area through positioning piles at the four corners of the edge; each photovoltaic module unit comprises a floating body platform, a photovoltaic net rack and an inverter box, connecting mechanisms are arranged among the floating body platforms in four directions and comprise male joints and female joints, the male joints and the female joints are oppositely arranged front and back and oppositely arranged left and right, and the male joints and the female joints are fixed through fixing pieces after being in butt joint. Different photovoltaic module units are connected through a connecting mechanism to form an integral floating platform of the photovoltaic module; according to the invention, the most difficult and most complex construction part of the offshore (mud flat) photovoltaic power station is transferred to the land factory for construction, the standardized and modularized construction is facilitated, then the modularized photovoltaic units are hauled to the offshore (mud flat) construction area and then are connected and fixed, the offshore construction process is simplified, and the construction difficulty of the offshore (mud flat) photovoltaic power station is reduced.

The utility model relates to the technical field of building construction, in particular to a climbing device of a cross-sea main tower formwork construction platform, which comprises a hanging seat fixed on a formed concrete foundation, a guide rail fixed on the hanging seat and arranged along the climbing direction of a formwork platform, and a bearing tripod capable of climbing along the guide rail, the climbing mechanism is used for driving the bearing tripod to move. The stand columns and the guide rails are in wrapping design, the stand columns can be attached to the guide rails more tightly, and the distance between the stand columns and the guide rails is greatly reduced. By means of the close fit design, shaking under the action of external factors such as wind power is reduced, the distance between the bearing tripod and a building is reduced, and the overall stability of the formwork platform is remarkably improved. Especially in offshore construction, canyon bridge construction and extra-high pier foundation construction, the design can effectively resist influence of sea wind, canyon wind and wind power in the pier construction process, shake of the formwork platform is reduced, and construction safety and stability of construction equipment are guaranteed.

The utility model provides an offshore suspension cable photovoltaic cross pile type anchoring structure, which comprises a first anchoring pile and a second anchoring pile, the first anchoring pile is fixedly connected with a guide pipe, the guide pipe is obliquely inserted into the first anchoring pile, two ends of a wire conduit are communicated with the outside, the second anchoring pile is arranged in the guide pipe, and the guide pipe is fixedly connected with the guide pipe. By arranging the cross pile type anchoring structure, the horizontal bearing capacity is improved, the horizontal force borne by the anchoring structure is converted into the pressure of the second anchoring pile and the pulling force on the first anchoring pile, the bearing capacity of the pile bodies is exerted to the maximum degree, the pile bodies are connected in a welded mode, the concrete consumption is reduced, the offshore grouting procedure is omitted, and the construction cost is reduced. The first anchoring pile is firstly sunk, it is ensured that positioning is simple and accurate, due to the fact that the guide pipe is arranged, the second anchoring pile is convenient to install, only a pile sinking mechanism identical with the first anchoring pile needs to be adopted, the problem that special pile sinking equipment is used is avoided, pile sinking construction cost is saved, offshore construction procedures are simplified, and construction efficiency is improved.

The utility model provides an offshore construction early warning buoy which comprises a supporting body, the outer side of the supporting body is sleeved with a floating base, the top of the supporting body is provided with a top frame, the top of the top frame is provided with a warning lamp, the two sides of the top frame are each provided with a photovoltaic panel, and the outer side of the floating base is provided with an anti-collision partition plate. Supporting plates are arranged at the two ends of the top of the anti-collision partition plate, and the ends of the supporting plates are detachably and fixedly connected with the top of the supporting body. According to the offshore construction early warning buoy, the anti-collision partition plate is arranged on the outer side of the floating base, so that when the offshore construction early warning buoy is used, floating objects on the sea surface cannot directly collide with the floating base, and the normal service life of the floating base is guaranteed; the anti-collision partition plate is supported and fixed to the top of the supporting body through the supporting plate, the anti-collision partition plate can be independently replaced after being damaged, and the maintenance cost is reduced.

The invention provides an adjustable floating wind power foundation based on reinforcement learning and a modular construction method, and belongs to the technical field of offshore wind power. Comprising a fan, and the bottom of the fan is fixed to a tower drum; the bottom of the tower drum is fixedly connected with the floating base; the floating base comprises a first buoy, a second buoy and a third buoy which are arranged in a triangular shape; wherein the bottom of the tower drum is fixedly connected with the first buoy; the first buoy, the second buoy and the third buoy are fixedly connected through supporting steel pipes; the tower drum is fixedly connected with the second buoy and the third buoy through inclined supports; the buoy is further connected with an anchor chain, and the other end of the anchor chain is connected with the suction barrel and anchored to the seabed through the suction barrel. By adopting a coupling connection mode of the inclined support, the tower drum and the floating drum, the storm resistance of the whole structure is improved. A steel-concrete composite structure is adopted, the steel consumption is reduced, and the material cost is reduced. A modular construction method is adopted, the offshore construction time is greatly shortened, and the influence of weather and sea conditions on engineering is reduced.

The utility model provides an offshore photovoltaic platform structure provided with a box transformer substation platform and a cable trestle. The offshore photovoltaic platform structure comprises a steel truss platform erected on the sea. The steel pipe piles are connected with the steel truss platform and used for supporting the steel truss platform, and the steel truss platform and the steel pipe piles are connected through inclined strut units; the photovoltaic module is laid in the steel truss platform; the box transformer substation platform is arranged on the north side of the steel truss platform; and a cable trestle is arranged on the steel truss platform. The box-type transformer substation platform installed on the steel truss platform is adopted, a traditional box-type transformer substation platform is often separated from a photovoltaic support, independent piling is needed, the box-type transformer substation platform is integrated on the steel truss platform, steel and offshore construction operation procedures are reduced, and the purposes of convenient construction and low cost are achieved.

The invention 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 ship bow and a ship stern, a pile leg is arranged in the ship body in a penetrating mode, a pile shoe is arranged at the bottom of the pile leg, and 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, the counterweight system is arranged in the cabin and comprises a rail, a flat car, a counterweight and a crane, the pile pulling system comprises a pile pulling platform module, the pile pulling platform module is connected with a stern through a hydraulic push-pull device, a pile pulling mechanism is arranged on the pile pulling platform module, and the pile pulling mechanism performs pile pulling operation on a pile foundation. The pile pulling cooperative control center can collect parameters such as upward pulling force and upward pulling speed in real time in the pile pulling process and can adjust the pile pulling speed of the auxiliary pile pulling operation to be consistent with the pile pulling speed of the main offshore self-elevating working platform, and the safety of the pile pulling platform and the working platform is guaranteed while the pile pulling effect is maximized.

The utility model discloses a profile steel frame water photovoltaic support system, which comprises a photovoltaic assembly, a profile steel frame and a support structure which are sequentially connected from top to bottom, the photovoltaic assembly is composed of a plurality of photovoltaic panels. The profile steel frame is formed by splicing a plurality of frames shaped like a Chinese character'ri ', and two photovoltaic panels are arranged on each frame shaped like the Chinese character'ri'; each photovoltaic panel is suspended and fixed above the profile steel frame in a manner of being parallel to the profile steel frame through a plurality of fixing buckles arranged on the frame shaped like the Chinese character'ri '; the bottom of the profile steel frame is fixed to the supporting structure through a connecting assembly. The connecting assembly comprises a single-claw connecting claw, a double-claw 90-degree connecting claw and a four-claw connecting claw. The profile steel frame water photovoltaic supporting system is reasonable in structural design and has the advantages of being convenient to construct, accelerating the construction progress and reducing the construction cost, full-assembly connection can be achieved only by conducting simple bolt butt joint and fixing on the profile steel frame and the supporting structure in the offshore construction part, the construction period is greatly shortened, and the construction safety risk is reduced.

The utility model discloses a single pile internal integrated suspension platform for deep sea fishery breeding, which comprises at least one layer of suspension platform, the suspension platform is suspended below an original working platform in a single pile, if multiple layers of suspension platforms exist, the suspension platforms are sequentially and downwards suspended below the working platform, and every two platforms are communicated with each other. According to the utility model, a large enough working area can be provided in the single pile for arrangement, operation and maintenance of culture equipment, and enough operation space is provided for fish collection and other culture work without occupying the original space of an inner platform and a tower barrel platform of the single pile. Meanwhile, the integrated suspension platform is integrated with a single-pile inner platform, can be hoisted together with the inner platform in the offshore construction stage, does not occupy extra ship engine resources, and has the advantage of low construction cost.

The invention provides a construction technology of a full-assembly type marine disaster comprehensive monitoring platform, and belongs to the technical field of monitoring platform construction, and the construction technology comprises the steps: 1, executing a construction measurement technology for the full-assembly type marine disaster comprehensive monitoring platform; 2, executing a prefabricated part shipping process for the full-assembly type marine disaster comprehensive monitoring platform; and step 3, executing an overwater installation process for the full-assembly type marine disaster comprehensive monitoring platform. Based on the construction engineering practice of a comprehensive marine disaster prevention and control system and aiming at the characteristics of heavy storm, rapid water flow, large component volume and high installation precision requirement of offshore construction of the comprehensive marine disaster monitoring platform, an innovative process covering the whole process of construction measurement, prefabricated component transportation and overwater installation is provided; the key technical problems of prefabrication, transportation and hoisting of open-sea large components are solved, the construction quality and safety of a monitoring platform are guaranteed, and the open-sea engineering construction efficiency is improved.

The utility model provides a platform type offshore boost transformer substation structure which comprises a cantilever pile foundation and a platform structure arranged above the cantilever pile foundation, a platform plate is laid in the platform structure, a self-supporting template is arranged in the platform plate, module installation areas are arranged on the platform structure in a partitioned mode, and the module installation areas are connected with the cantilever pile foundation. A corresponding prefabricated cabin type boosting module is mounted in the module mounting area; a steel beam distribution layer is arranged at the bottom of the platform structure, steel beams in the steel beam distribution layer are used for being connected with a platform plate, and connecting structures connected with the bottoms of the steel beams in a supporting mode are arranged at the pile tops of the cantilever pile foundations so that adjustable interval spaces can be formed between the pile tops of the cantilever pile foundations and the steel beams. The connection between the pile top and the steel beam is realized through the connection structure on the pile top of the cantilever pile foundation, and the connection structure is formed by modular splicing, has a certain flexible adjustment space, and not only can cope with uncertain factors of offshore construction.

A connector assembly 200 for connecting two pipe sections. The pipe sections may be used in offshore construction such as offshore oil and gas exploration and offshore wind turbine generators. First 201 and second 202 connector elements adjoin first and second pipes and are couplable together. A circumferential recess 204 is defined by the connector elements and a locking ring 203 fits in the recess 204 to lock the connector elements. Engaging elements 205 of the connector elements engage with the locking ring 203. Overlapping members 206, 207 of the connector elements form a lap joint when the connector elements are coupled. In one aspect, the engaging elements extend over the region of overlap of the overlapping members. In another aspect, there is a substantially consistent spacing between upper and lower profiles of the locking ring and upper and lower corner edge profiles of the recess. This may contribute to a reduction in stress and mitigate fatigue.

The utility model belongs to the technical field of offshore construction, and discloses a special-shaped pipeline hoisting device which comprises an upper hoisting sling unit, a hoisting frame main body and a lower hoisting sling unit, the upper hoisting unit is configured to be connected with ascending hoisting equipment, the hoisting frame main body comprises two hoisting frames which are arranged at an included angle, and each hoisting frame is connected to the upper hoisting unit; the lower hoisting unit comprises a plurality of hoisting assemblies arranged at intervals in the horizontal direction, and each hoisting assembly is arranged between the hoisting frame body and the special-shaped pipeline. The hoisting assembly comprises a hoisting rope, a dynamometer and a hoisting belt, the hoisting rope is connected between the hoisting belt and the hoisting frame, the dynamometer is arranged on the hoisting rope and can measure the value of tension borne by the hoisting rope, and the hoisting belt is annularly arranged on the special-shaped pipeline. The distance between the hoisting frame and the special-shaped pipeline is adjusted according to the tension value measured by the dynamometer, so that stress balance of hoisting of the special-shaped pipeline is ensured, deformation and damage of the special-shaped pipeline are prevented, and smooth proceeding of follow-up construction is ensured.

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 relates to the technical field of offshore construction, in particular to an offshore open tubular pile penetration hammering force and soil plug monitoring and protecting system and a monitoring method. Comprising a hammering force monitoring module arranged at a pile top opening, a soil plug height dynamic monitoring module and a protection module. The soil plug height dynamic monitoring module comprises an absolute soil plug height monitoring mechanism and a relative soil plug height monitoring mechanism, the absolute soil plug height monitoring mechanism is located above the relative soil plug height monitoring mechanism, the absolute soil plug height monitoring mechanism makes contact with the relative soil plug height monitoring mechanism, and the relative soil plug height monitoring mechanism makes contact with the surface of the soil plug; the protection module is arranged in the axial direction of the open pile and wraps the sensor on the inner wall of the pile body. The efficiency and safety of offshore large-diameter open steel pipe pile sinking construction are improved, accurate data support is provided for construction control by monitoring key parameters in real time, and construction risks are reduced.

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 relates to the technical field of ray detection systems, in particular to a self-protection digital ray detection system suitable for submarine pipeline laying. Centering supporting modules are arranged in a bilateral symmetry mode and are annular, and the tops of the left part and the right part of each centering supporting module are rotationally connected; when the left part and the right part of the centering supporting module rotate outwards at the same time, the centering supporting module is opened, and when the left part and the right part of the centering supporting module rotate inwards at the same time, the centering supporting module is closed; opening and closing of the whole system are controlled through the opening and closing lifting module. The driven sliding rail module is driven by the motor to rotate along the centering outer rail gear ring, and circumferential detection of the circumferential weld of the pipeline is achieved. And the internal lead shielding layer can realize ray radiation self-protection and prevent rays from leaking to cause radiation to operators and influence the health of the operators. The ray radiation protection range is smaller than three meters, the requirement for cross operation of offshore construction ships can be met, and the detection efficiency and accuracy are improved.

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.

The present invention provides a prefabricated coating and anti-corrosion construction method for wind turbine tower corrosion protection, which relates to the technical field of corrosion protection of the outer wall of offshore wind turbine tower pile foundations. The prefabrication method prepares an anti-corrosion structure for the outer wall of a wind turbine tower, including a wind turbine tower, wherein a rolling frame is symmetrically provided at the lower end of the wind turbine tower, an electric rotating device is provided at the center of a side wall near the wind turbine tower, a brush is provided at the upper end of the side wall of the electric rotating device near the side wall of the wind turbine tower, and a second layer of corrosion protection strip and a first layer of corrosion protection strip are provided on the side wall of the electric rotating device. By adopting this process flow, prefabrication on land can completely avoid the occurrence of various dangerous situations during offshore construction, and the mechanical strength of the formed coating and corrosion protection structure is much higher than that of traditional coating and corrosion protection technology, thereby realizing the coating and corrosion protection technology innovation of "prefabrication on shore and piling in the sea".

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.