66 results about "Dry dock" patented technology

A portable marine lift capable of multi-directional off-loading of yachts, ships, and other marine vessels at ground level to dry-dock them. It is compact and barge-like, and can be shared by independent shipyards, or used to expand the work area within a single port facility or shipyard. It is also self-contained when fitted with generators and/or propulsion means via add-on pods, and comprises independent platform sections joined together to meet any hull design, length and water depth. Platform sections have the ability to submerge, and may also be employed to capture and temporarily contain environmentally hazardous materials commonly produced by shipyards. In addition, the platform sections are preferably open-framed for weight savings. Computerized lifting, via multiple lift modules secured to platform sections, assures lifting of vessels in substantially level orientation. Optionally, platform sections can be configured for shallow water operation, with locking devices, and/or guides usable for off-loading railway alignment.

The invention discloses a combined gate-type dry dock door which comprises gates, two fixed gate piers, a dock sill and a hoist. A plurality of movable gate piers are arranged between the two fixed gate piers, and the lower ends of the movable gate piers are movably connected with the dock sill; the gates are arranged between the fixed gate piers and the movable gate piers and between two movable gate piers; the upper ends of the movable gate piers are provided with cables, and the cables are connected with ground anchors which are arranged on the left riverside and the right riverside; and the cable and the gate form an included angle. The combined gate-type dry dock door has low manufacturing cost, is convenient to operate and easy to maintain and is suitable for the large and medium-size dry dock.

A watercraft support platform casing for a floating dry dock for light weight watercrafts is described. The support platform casing has integrally formed floatation chambers and an elongated central ramp is formed in the top surface of the casing to support the hull of a watercraft positioned thereon. The ramp has a thraugh-like upper surface with a sloped forward entry way formed integral therewith and terminates in a lower forward projecting edge. The support platform is provided with connectors on opposed side walls thereof for a rigid connection with a plurality of floatation casings to support the platform casing on a water surface with the entry way positioned to receive the bow of a watercraft in movement whereby the watercraft can project itself on the central ramp above the water surface.

The invention relates to the technical field of immersed tube tunnel construction, in particular to a negative buoyancy immersed tube and a prefabricating method thereof. The immersed tube comprises abody, wherein the designed freeboard value of the body is smaller than 0. According to the negative buoyancy immersed tube, pipe joints do not need to be designed to be capable of self-floating in acorresponding water area, therefore, the section height of the immersed pipe does not need to be increased for guaranteeing the minimum freeboard value during floating transportation, the design contradiction between freeboard value consideration and anti-floating in the operation period in the design link is avoided, a dry dock does not need to be set for freeboard value detection, the method isparticularly suitable for engineering projects with limited fields, the design concept that a self-floating immersed tube must be adopted in the prior art is broken through, the structural height canbe reduced to the maximum extent, the engineering amount of a main body structure, foundation trench backfilling and the like is reduced, a freeboard adjusting layer does not need to be arranged, theprefabricating cost and the construction cost are effectively reduced, design difficulty and prefabricating difficulty are reduced, the cumbersome operation of adjusting the freeboard value in water in the floating transportation link is avoided, the transportation time can be shortened, and the method has important popularization significance and good application prospects.

The invention discloses a construction method of a dry dock foundation pit. The construction method comprises the steps that A, a cutoff wall is built outside a foundation pit construction area, wherein the cutoff wall surrounds the foundation pit construction area, and the bottom of the cutoff wall reaches an impermeable layer; a drainage ditch is dug in the surface outside the cutoff wall; a plurality of vertical dewatering wells are dug between the cutoff wall and the foundation pit construction area; the foundation pit is excavated; and a drainage cushion layer is laid at the pit bottom ofthe foundation pit, a drainage pipe is installed in the drainage cushion layer, and then a concrete layer is poured on the upper surface of the drainage cushion layer. The invention further disclosesa dry dock foundation pit structure which can be constructed by adopting the construction method. According to the construction method, rainwater, groundwater, surface water and the like can be prevented from entering the foundation pit and generating accumulated water, so that the construction is continuously and normally carried out, the construction efficiency is improved, and the constructionquality is ensured.

The invention discloses a method for prefabricating pipe joints of an immersed tube tunnel. The method comprises the following steps that 1, steel bars are bound in a shallow dry dock, and the pipe joints are poured; 2, a steel end shell, a steel end sealing wall and a guiding device are arranged at the two ends of each pipe joint; 3, a waterproof layer of each pipe joint is constructed; 4, prefabricated plates are prefabricated in a prefabricated site beside an assembling platform; 5, a dock door is opened, the pipe joints are conveyed to the assembling platform in a floating mode, and a hoisting system is arranged on the assembling platform; 6, the prefabricated plates are hoisted to the corresponding positions of the pipe joints through the hoisting system; 7, the waterproof layers areapplied above the prefabricated plates; and 8, the pipe joints are dragged to designated positions for reassembling and then sinking. According to the method, the pipe joint floating process is shallow in draft depth, the temporary project is little, the dredging amount in water or dredging is not needed, the environment influence is small, and streamlined operation can be carried out.

The invention discloses a structural system for flatly prefabricating and modularly transporting a large-scale immersed tube tunnel tube section. The structural system for flatly prefabricating and modularly transporting the large-scale immersed tube tunnel tube section comprises a land area prefabrication platform, a modular transportation platform, and an ultra-large type pipe section transportation barge, wherein the land area prefabrication platform comprises a bottom steel plate for supporting the tunnel tube section and multiple rows of support pillars; the tunnel tube section is transported by land through the land area prefabrication platform; the modular transportation platform is used for sending the tunnel tube section to the transportation barge and then retreating, is capableof automatically adjusting the height, and comprises multiple communicated transportation modules; the transportation modules are arranged on the bottom part of the bottom steel plate and are locatedbetween the adjacent support pillars; and the ultra-large type pipe section transportation barge is used for transporting the tunnel tube section in a water area. According to the structural system for flatly prefabricating and modularly transporting the large-scale immersed tube tunnel tube section provided by the invention, a dry dock has no need to be built, so that the input of an immersed tube tunnel construction temporary project is reduced, the immersed tube tunnel cost and the construction period are saved; the requirement on the floor space required for tube section prefabrication issmall, so that the applicability of the immersed tube tunnel is higher; the tube section is transferred through the modular transportation platform, so that the transportation modes are flexible; andthe requirement on the fairway depth is low, so that the dredging of an existing fairway can be avoided or reduced.

A method of constructing a semi-submersible drilling rig in a shipyard and fully assembling it in a shipyard. The upper hull (1) is built on land adjacent to the dry dock in which the lower hull (2) is built and the joining of the upper and lower hulls is finally done in the dry dock. The upper shell slides to a position above the lower shell, and the lower shell is floated up by injecting water into the dry dock, and the position of the lower shell is adjusted through the ballast tank in the lower shell. Once the upper and lower hulls are in contact alignment, they are permanently welded together, completing the rig assembly in dry dock.

The invention provides a dry dock ship guiding system, and the system comprises two traction rails, wherein the two traction rails are symmetrically arranged on two sides of a dry dock; two traction winches which are arranged at the tail ends, facing the land side, of the two traction rails correspondingly; two small rail cars which are respectively arranged on the traction rail, wherein the traction winches are connected with the small rail cars through the traction rope, so the small rail cars moves along the traction rails under the traction of the traction winches; and a rigging, wherein one end of the rigging is connected with the rail trolley, and the other end of the rigging is used for being connected with a ship. According to the dry dock ship guiding system, the track trolley is driven by the traction winch to drag a ship to enter the dry dock, and meanwhile the ship can stably and safely enter the dry dock through cooperation of the traction track.

The invention provides a dry dock track mounting method. The dry dock track mounting method comprises the steps that the groove bottom of a track groove is cleaned; a steel base plate is mounted at the bottom of the track groove; cement is poured into gaps between the two sides of the steel base plate and the groove wall of the track groove; a rubber base plate is laid on the steel base plate; anda track is arranged on the rubber base plate. On the premise of simplifying the track mounting process, the track mounting quality is guaranteed, and the track mounting stability and mounting efficiency are improved.

The invention provides a dry dock arrangement method based on an immersed tunnel crossing a centerline, which comprises the following steps of: taking a foundation trench excavated in the middle line of a tunnel line on the upper edge of the centerline as a dry dock prefabricated pipe joint, dragging a first batch of pipe joints out of the dock through dock gate hinges arranged at two ends of the foundation trench to carry out sinking butt joint, and prefabricating subsequent batches of pipe joints after a dock gate is recovered; and the last batch of pipe joints are foundation trench inner pipe joints, sinking butt joint is carried out through ground anchor hinge dragging, final joints are poured in an underwater joint mode, and finally construction of the immersed tunnel is completed. According to the method, a dry dock does not need to be independently built, the problem that the site selection difficulty of a different-place dry dock is large is solved, long-distance floating transportation is not needed, large-range channel dredging is avoided, the pipe section floating transportation risk is reduced, the project investment is greatly reduced, and meanwhile, the underwater final joint is adopted, and the problem that the construction period of a conventional axis dry dock is long is solved.

The invention relates to an immersed tube segment batch prefabricating method capable of reducing the scale of a dry dock. The method comprises the following steps that (1) in a small temporary dry dock, part of components of an immersed tube segment are prefabricated for the first time, the components comprising a bottom plate, part of a sidewall, a middle partition wall and sealing doors at two ends, an open type tube segment similar to a ship is formed, the dead weight of the tube segment is reduced as much as possible, and the draft depth of the tube segment is reduced as much as possible; (2) the tube segment is towed to the position near a tunnel site; (3) a prefabricated site without silt accumulation is selected in water and leveled, a plurality of uninflated air bags are immersed in the site and anchored to the river bottom, and the air bags are inflated; (4) the tube segment is slowly located on the inflated air bag structure; and (5) the rest part of the side wall and top plate reinforced concrete part of the tube segment are poured and constructed for the second time, and overall prefabrication of the immersed tube segment is completed. According to the immersed tube segment batch prefabricating method, the work amount is small, the influence on the environment is small, and the site area of the temporary dry dock, the foundation pit depth and the tube segment hauling difficulty can be effectively reduced.

Disclosed is an auditable networked shipyard capable of building and/or repairing ships with real-time progress and cost tracking, as well as instant and efficient auditability. The shipyard provides standard shipyard components such as cranes, drydocks or syncrolifts, tools, and consumable items such as paint and parts. The shipyard is configured to provide welding, machining, pipefitting, electrical, rigging, and other relevant functions for the building and/or repair of ships. In order to match resources to functions, track availability of resources, and generally oversee operations of the shipyard, a totally reliable auditable contracting enterprise resource planning system (“TRAC system”) is configured to allow real-time oversight of each work item on each job of a business in the ship repair or ship support industry. The TRAC system consolidates all business management and production functions into a single enterprise resource planning (“ERP”) system.

The invention discloses an offshore inland river intersection area immersed tube tunnel construction technology. The offshore inland river intersection area immersed tube tunnel construction technology comprises the following steps that S1, water channel traffic reconciliation and immersed tube tunnel foundation trench excavation and desilting construction are carried out, the immersed tube tunnel foundation trench is excavated and constructed stage by stage, and smooth navigation of at least one side of a water channel is kept; S2, immersed tube joints are prefabricated in a river bank dry dock in batches; S3, floating transportation and sinking installation construction of immersed tube joints are carried out; and S4, immersed tunnel foundation trench backfilling construction is carried out. The problem of navigation coordination of all the river channels in the river intersection area is solved, foundation trench staged construction is carried out according to the floating transportation scheme and the water transportation condition, smooth navigation of at least one side channel is kept during foundation trench construction in each stage, so that the influence of construction on navigation of all the river channels in the river intersection area is effectively reduced, and the river channels can still be kept in a normal navigation state; and in addition, the pipe joints are prefabricated, subjected to floating transportation and sinking, and installed in batches, and the construction efficiency is effectively improved.

The invention discloses a device and a method for manufacturing an immersed tube tunnel pipe section without a dry dock and using hydraulic jacking. The device comprises a dry dock-free pipe section prefabrication platform, a wharf and a transportation immersion ship which are sequentially connected; the dry dock-free pipe section prefabrication platform comprises a middle flat prefabricated platform, a plurality of flat prefabricated platforms on two sides, a bottom steel plate, rail beams and stiffening beams; the middle flat prefabricated platform is connected with the wharf through a sliding rail arranged on a parallel water front and is used for transporting the pipe section onto the transportation immersion ship through the wharf; the plurality of flat prefabricated platforms on twosides are separately arranged on the two sides of the middle flat prefabricated platform, are arranged perpendicular to the middle flat prefabricated platform, and are used for conveying the pipe section to the middle flat prefabricated platform; and a plurality of rows of rail beams and a plurality of rows of stiffening beams are arranged perpendicular to each other to form a rectangular dry dock-free pipe section prefabrication platform. According to the device and the method, different from the conventional mode that after a large foundation pit is excavated in a dry dock, the pipe sectionis subjected to flotation conveying after water injection, a single section of an immersed tube tunnel pipe section main body structure is poured on flat ground, and the sliding rail and a hydraulic jacking device are used as land area transport carriers of the pipe section, so that the transition from the land area to the water area is completed.

The invention provides a sea chest rapid water supply device during ship dry dock period. The device comprises a water supply valve box arranged on a sea chest, a plurality of connecting pull rods penetrating into the water supply valve box are arranged on the water supply valve box, the inner ends of the connecting pull rods are arranged in a T-shaped state and hooked on the edge opening of the sea chest, and nuts are arranged at the outer ends of the connecting pull rods. The water supply valve box is fixed on the sea chest through nuts. The sea chest rapid water supply device has the beneficial effects of being stable in performance, convenient to operate and implement and capable of meeting the water supply requirement for normal operation and use of ship equipment and a system of a ship in the dry dock period; meanwhile, the technical defects that in a traditional construction method, many types of work are involved, procedures are complex, the labor input is large, the period islong, and ship body outer plate base metal damage is caused to a certain degree can be effectively overcome, production cost saving, labor efficiency improving and product construction quality improving are facilitated, and the construction period of ships in dock engineering is shortened.

The invention relates to the technical field of immersed tube transportation, and discloses an immersed tube floating-state barge-up method which comprises the following steps: A, constructing a submerged bottom sitting area of a semi-submersible barge, and arranging a buttress system on the semi-submersible barge; b, operating the semi-submersible barge to dive and sit on the bottom, and floating the immersed tube in the dry dock; c, after the semi-submersible barge sits on the bottom, transporting the immersed tube to the position over the buttress system in a floating mode; and D, positioning and mooring the semi-submersible barge and the immersed tube, operating the semi-submersible barge to drain and float, supporting the immersed tube by the buttress system, supporting the immersed tube out of the water surface, and completing the barge-up work of the immersed tube. According to the immersed tube floating-state barge-up method, immersed tube barge-up can be completed through floating transportation, site limitation of construction of the barge-up wharf is avoided, transportation through the barge-up wharf, the rail and the trolley is not needed, immersed tube barge-up operation is easy, and the construction cost is also controlled.

The invention discloses a mobile dry dock prefabricated immersed tube joint measuring method. The method comprises the steps of S1 establishing a measurement plane above a deck surface of a mobile dry dock, and enabling the measurement plane to be parallel to the deck surface; S2 establishing a plurality of main control points on the deck surface, the main control points being located on the outer side of the projection of an immersed tube joint needing to be prefabricated on the deck surface, and arranging a main observation station at the main control points based on the measurement plane; and S3 placing an adjusted theodolite on the main observation station, and measuring the prefabricated immersed tube joint through the theodolite based on the measurement plane. According to the movable dry dock prefabricated immersed tube joint measuring method, the immersed tube joint can be accurately measured in the process of prefabricating the immersed tube joint.

The invention provides a slipway and a ship transfer method, and belongs to the technical field of ships, the slipway comprises a frame body with an upper surface for berthing of a ship, a connecting structure matched with a carrying device and detachably or movably connected, and a lifting mechanism for lifting the frame body and the ship on the frame body together. By applying the slipway, the ship can be stably transferred to the shore without deformation, the operation cost can be greatly reduced, damage to natural ecology due to construction of a dry dock and use of a floating dock is avoided, and the slipway is economical, environmentally friendly, low in energy consumption and practical.

The invention belongs to the technical field of engineering measurement, and relates to an immersed tube joint floating state calibration method. The floating state calibration method comprises the steps that a pipe joint coordinate system is established in a dry dock area, at least three non-collinear pipe top middle section feature points are arranged on the middle section of the top face of a pipe joint, and three-dimensional coordinates of the non-collinear pipe top middle section feature points in the pipe joint coordinate system are calibrated; the pipe joint is moved to an outfitting area, the head end and the tail end of the top face of the pipe joint are each provided with a measuring tower, tower top feature points are arranged, the spatial distances between the three pipe top middle section feature points and the two tower top feature points are measured, the three-dimensional coordinates of the three pipe top middle section feature points in a pipe joint coordinate system are combined, calculation is carried out through a spatial distance intersection method, and the three-dimensional coordinates of the three pipe top middle section feature points in the pipe joint coordinate system are calculated. And three-dimensional coordinates of the two tower top feature points in the pipe joint coordinate system are obtained. The method is easy to operate, calibration of the tower top feature points of the measuring tower can be completed only through distance measurement, the problem that the floating state calibration precision is poor due to the fact that an existing pipe joint calibration method is affected by posture changes when the pipe joint floats is solved, and the measurement calibration cost and difficulty are reduced.

The invention relates to a dry-dock-free underwater shallow-buried open-cut large channel basic structure unit and a construction method. The basic structure unit used in the method has the following characteristics that the length of each basic structure unit is 20-25m, a sealing door is arranged at one end of each basic structure unit, the other end of each basic structure unit is of an open structure, and a drainage pressure relief valve is arranged at the lower end of each sealing door; a rubber water stop belt is arranged at the end of each basic structure unit in a surrounding mode, and a floating and ballasting cabin capable of adjusting the water inlet and drainage capacity is fixed in each basic structure unit; and at least four axis positioning foot stands are arranged at the bottom of each basic structure unit. The channel basic structure unit can be directly prefabricated on the flat ground, a large temporary dry dock does not need to be built, the temporary engineering investment is reduced, the manufacturing cost of an underwater channel is reduced, and the construction period of the underwater channel is shortened; and the basic structure unit can slide into a water area from a land area through a slideway, the basic structure unit is kept in a suspended state in water by adjusting the air volume in the floating and ballasting cabin, the basic structure unit is pulled and sunk by a floating crane ship, the construction efficiency is improved, and the water construction difficulty is reduced.