The invention provides an assembled offshore single-pile foundation construction platform. The construction platform can serve as a large single-pile foundation drilling platform or a large single-pile driving stable pile platform, and comprises a stable pile frame, a steel protection cylinder and steel pipe piles; a positioning cylinder is arranged in the center position of the stable pile frame; multiple locking oil cylinders are symmetrically embedded in the upper end and/or the lower end of the positioning cylinder in the peripheral direction; the steel protection cylinder is inserted in the positioning cylinder, and is radially positioned by the locking oil cylinders; multiple mounting sleeves are uniformly and annularly arranged at the external of the positioning cylinder; the mounting sleeves and the positioning cylinder are fixedly connected through radial trusses; the adjacent mounting sleeves are fixedly connected through peripheral trusses; and the steel pipe piles are inserted in the mounting sleeves, and are connected with the mounting sleeves through clamping keys. The construction platform is quickly assembled through a detachable mode without needing offshore welding work, and can be recycled; and more importantly, through unique structural design, the construction platform is high in stability of bearing the wave load.

Assembled offshore single-pile foundation construction platform and construction process thereof

The invention belongs to the field of offshore wind power foundations and discloses a combined type cylindrical foundation with apron boards and a construction method of the combined type cylindrical foundation. The combined type cylindrical foundation comprises a steel cylindrical structure, a reinforced concrete top cover and a reinforced concrete transition section. The outer edge of a top cover of the steel cylindrical structure is expanded out of the steel cylindrical structure and is provided with the steel apron board in a welding manner. The reinforced concrete apron board is arranged on the edge of the reinforced concrete top cover. The lower portion of the reinforced concrete top cover and the steel cylindrical structure are connected through shear nails, and the upper portion of the e reinforced concrete top cover is connected with the reinforced concrete transition section in a pouring manner. During construction, the combined type cylindrical foundation sinks through dead load and sinks through negative pressure in sequence till the bottom of the steel apron plate enters a seabed, and then the sinking force is increased through water pumping of a water pumping pipe on the inner side of the steel apron board. After the combined type cylindrical foundation sinks in place, ballast stone blocks are thrown between the reinforced concrete apron board and the reinforced concrete transition section. The combined type cylindrical foundation is simple in structure, convenient to construct, low in cost and capable of automatically floating to be towed and sink, the capsizing resisting and scouring resisting capability of the foundation in normal use can be increased due to the additional arrangement of the apron board, and the sinking inertia force of the foundation is effectively improved.

Combined type cylindrical foundation with apron boards and construction method of combined type cylindrical foundation

The invention discloses an offshore wind power installation platform. The offshore wind power installation platform comprises a main hull, lifting devices, four spud legs, a spud-around type crane, aliving building and a driving control room. The four spud legs are arranged on the main hull, and each spud leg is connected with the main hull through the lifting devices. The offshore wind power installation platform is characterized in that the main hull is of an axisymmetric structure and the central axis of the main hull is arranged in the ship length direction; the four spud legs comprise the first spud leg located at the stern of the main hull, the second spud leg located at the bow of the main hull, the third spud leg and the fourth spud leg, wherein the third spud leg and the fourth spud leg are located on the two sides of the main hull, the first spud leg and the second spud leg are both located on the central axis, the first spud leg and the second spud leg are located on the midperpendicular of the connected line of the third spud leg and the fourth spud leg, and the first spud leg and the second spud leg are located on the two sides of the connected line of the third spudleg and the fourth spud leg correspondingly; and the spud-around type crane is arranged on the position of the first spud leg, and the living building and the driving control room are located at the bow of the main hull. According to the offshore wind power installation platform, through arrangement of the four spud legs, the spud-around type crane, the living building and the driving control room, the deck use ratio of the wind power installation platform is increased, and meanwhile balancing of hull loads is facilitated.

Offshore wind power installation platform

The invention discloses a positioning pile-driving guide frame. The positioning pile-driving guide frame comprises a rack and a construction platform rotary plate used for driving the rack to rotate. An upper platform and a lower platform are arranged at the upper end and the lower end of the rack correspondingly. Skirt pile grippers are arranged on the upper platform and the lower platform correspondingly, the skirt pile gripper arranged on the upper platform is the upper platform skirt pile gripper, and the skirt pile gripper arranged on the lower platform is the lower platform skirt pile gripper. The center of an abdominal cavity of the upper platform skirt pile gripper coincides with the central axis of the rack. A driving mechanism is arranged between the lower platform skirt pile gripper and the lower platform and drives the lower platform skirt pile gripper to horizontally move. According to the positioning pile-driving guide frame, continuous inserting, driving and sinking conducted on inclined pile groups in abyssal regions are achieved, and the advantages of being simple in structure, convenient to construct and high in efficiency are achieved.

Positioning pile-driving guide frame and construction method thereof

The invention belongs to the field of offshore wind power foundations and discloses a compound bucket foundation with a skirtboard and a construction method thereof. The foundation comprises a steel bucket structure, a reinforced concrete top cover and a reinforced concrete transitional section; the outer edge of the top cover of the steel bucket structure is expanded out of the steel bucket structure and a steel skirtboard is welded; the lower portion of the reinforced concrete top cover is connected to the steel bucket structure through a shearing force nail and the upper portion is in pouring connection to the reinforced concrete transitional section. The construction method comprises the following steps: performing self-weight submerging and negative pressure submerging successively till the bottom of the steel skirtboard enters a seabed; and then extracting water through a water extraction pipe on the inner wall of the steel skirtboard to increase the sinking force of the compound bucket foundation. The foundation provided by the invention is simple in structure, convenient to construct and low in cost, and self-floating towing and negative pressure sinking can be performed, and the skirtboard is additionally arranged, so that the antidumping and anti-erosion properties of the foundation in normal use can be enhanced. Moreover, the sinking force of the foundation is effectively improved, and meanwhile, soil plug development in the steel bucket foundation is reduced.

Compound bucket foundation with skirtboard and construction method thereof

The invention relates to a steel cylinder type foundation structure of an offshore wind turbine. The steel cylinder type foundation structure is characterized by comprising an upper steel cylinder, a steel cover plate, a lower steel cylinder and shifting boards, wherein the upper steel cylinder is fixedly connected with the steel cover plate; the steel cover plate is fixedly connected with the lower steel cylinder, an inner steel cylinder is arranged in the lower steel cylinder, a plurality of steel compartment are formed between the lower steel cylinder and the inner steel cylinder by division of the shifting boards, and reserved holes are formed in the steel cover plate. The steel cylinder type foundation structure disclosed by the invention has the beneficial effects that compared with the prior art, complete onshore control can be realized, the offshore operation time of a foundation of the offshore wind turbine is reduced, the advantage of a caisson cylinder structure which is suitable for a soft foundation without foundation reinforcement treatment and the construction technology of the caisson cylinder structure which sinks by negative pressure after being vacuumed are fully utilized, the defects that a concrete structure is easy to crack and is poor in durability are overcome, and the whole rigidity and the stability of the structure are increased.

Steel cylinder type foundation structure of offshore wind turbine

The utility model relates to a multi -functional marine construction is from peaceful platform, including hull, spud leg, hoist, armful stake ware and main generator, characterized by: the spud leg is equipped with four, and is located hull side string department respectively and is symmetrical arrangement, the spud leg includes upper portion spud leg and lower part spud leg, the upper portion spud leg comprises a plurality of spud legs segmentations, and each segmentation spud leg is pegged graft the back each other and is constituted wholly, and the lower part spud leg is whole spud leg, a plurality of pinholes of equipartition are gone up along its longitudinal center line to the spud leg, the spud leg is the corresponding lifting device that is provided with respectively, the lifting device is and is located the spud leg periphery around the type, the hoist is located skew hull longitudinal axis one side at the hull, embrace the stake ware and arrange ship stern or shipboard in, main generator is located the crane base below. Beneficial effect: collect jack -up, pile, hoist and mount, transportation A number of functions, possess the intertidal zone and sit beach, coastal waters jacking state operation and floading condition operation function, can realize that a ship is multi -purpose, reduce ship machine expense.

Multi -functional marine construction is from peaceful platform

The invention relates to a rotating type floating pile driving guide frame. The rotating type floating pile driving guide frame is characterized by comprising a positioning steel pile, a guide frame body and a pile holding device; the guide frame body comprises an upper guide frame and a lower guide frame, wherein each of the upper guide frame and the lower guide frame comprises a fixed truss, a standard section truss and a positioning truss which are connected from back to front in a sequence; the pile holding device is fixedly connected to each positioning truss; the upper guide frame is connected with the lower guide frame through a sleeve to form an integral same-group pile driving guide frame; the sleeve is fixedly connected to the inner side of a sleeve truss; a flange plate is fixedly connected to the lower end of the sleeve; a bracket is arranged at the lower end of the positioning steel pile; a reserved inserting hole is formed in the bracket; the sleeve is inserted into the positioning steel pile; the flange plate is connected with the bracket through an inserting pin. The rotating type floating pile driving guide frame has the beneficial effects that a base pile can be accurately positioned, and an inclined pile in any angle can be driven; all group file foundations can be built by one-time stopping of a ship, and therefore, the construction efficiency is greatly increased, and the construction cost of the ship can be decreased.

Rotating type floating pile driving guide frame

The invention relates to a steam curing method for rapid high-freezing-resistance fence plate forming. The method comprises the following technology steps that a steel bar framework cage is prepared, and die filling is conducted; concrete mixture is prepared, a die is filled with the stirred concrete, a centrifugal motor at the die bottom face is used for vibration, the die and fence plates are hoisted into a steam-cured pond at the same time to be subjected to steam curing, the initial temperature ranges from 20 DEG C to 30 DEG C, and standing is conducted for 5.0 h in the steam-cured pond; the temperature is increased for 0.5 h to reach 50 DEG C; the constant temperature is kept for 5.0 h in the environment with the temperature being 50 DEG C; and steam supply is stopped, cooling is conducted for 0.5 h, the temperature is reduced to 20-30 DEG C, the steam-cured pond is uncovered, the die and the fence plates are hoisted out together, and finished fence plate products are hoisted out and stacked. The steam curing method has the beneficial effects that through a curing technology for adjusting formed prefabricated parts, the finished product speed, the finished product quality and the finished product yield of the fence plate products are improved. The compressive strength of the steam-cured fence plates meets the regulated requirement, and the freezing and thawing resisting performance reaches F350 or above.

Steam curing method for rapid high-freezing-resistance fence plate forming

The utility model relates to a marine wind turbine foundation structure, characterized by: including a plurality of steel -pipe piles and steel platform, the steel platform includes bottom end rail, upper and lower longeron and steel sheet, and the rigid coupling has a lower longeron on the bottom end rail, longeron upper portion rigid coupling has the entablature down, and entablature upper portion rigid coupling has last longeron, and it has the steel sheet to constitute whole steel platform to go up longeron upper portion rigid coupling, and bottom end rail and steel -pipe pile top rigid coupling, steel -pipe pile constitute steel platform basis. Beneficial effect: the utility model discloses can guarantee that crawler crane operation on the steel platform is not influenced by the stormy waves condition, reduce the construction of marine pile foundation, a tower section of thick bamboo and the fan construction and installation degree of difficulty, guarantee construction quality, improve the efficiency of construction, can show the reduction of erection time, save large -scale construction boats and ships ship machine expense, reduce project cost, but have the advantage that drops into the low reuse of reaching.

He Jun

Papers

Steel cylinder type foundation structure of offshore wind turbine

Multi -functional marine construction is from peaceful platform

Rotating type floating pile driving guide frame

Steam curing method for rapid high-freezing-resistance fence plate forming

Marine wind turbine foundation structure