The invention discloses a damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and a manufacturing method thereof, and belongs to the field of bridge engineering. An exposed node connecting piece consists of a foot plate, anchor bolts, end connecting plates and buckling restraining sleeves. A connecting plate is mounted between prefabricated steel pipe concrete sections through high-strength bolts; the exposed node connecting piece is connected with each of a cover beam and a bearing platform by utilizing the anchor bolts, and is connected with a prefabricated steel pipe concrete section through the high-strength bolts relying on the end connecting plates. A pre-stressed tendon penetrates through a section prefabricated steel pipe concrete pier; the two ends of the pre-stressed tendon are respectively anchored to the interiors of the bearing platform and the cover beam by using anchorage devices. The energy consumption-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier disclosed by the invention has the characteristics of small post-seismic residual displacement, high energy consumption capacity, controllable energy consumption, high assembling degree, convenience and quickness in construction process, greenness, high efficiency, energy conservation, environment friendliness, easiness in factory production, convenience and quickness in construction, and the like; the construction period of the pier can be remarkably shortened.

Damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and manufacturing method thereof

The invention relates to a pile column type concrete hollow pile pier structure. The pile column type concrete hollow pile pier structure is characterized by comprising a concrete hollow pile pier, a bridge support, a pier cover beam and a base bearing platform, a flange disc is arranged at the lower end of the concrete hollow pile pier, a reserved bolt hole is formed in the flange disc, the flange disc is connected with the base bearing platform, the flange disc and the base bearing platform are arranged in cast-in-place concrete, an upper bridge support steel plate is arranged at the upper surface of the bridge support while a lower bridge support steel plate is arranged at the lower surface of the bridge support, a flange disc is arranged at the upper end of the concrete hollow pile pier and connected with the lower bridge support steel plate, and the upper bridge support steel plate is connected with the pier cover beam. The pile column type concrete hollow pile pier structure has beneficial effects that the concrete hollow pile pier can be prefabricated in a factory, the pier length can be controlled precisely, the bearing ability of the pier is improved, the concrete hollow pile pier is connected with the base bearing platform through using the flange discs and an insert core reinforcing cage and casting concrete in place, the connecting intensity of the pier can be guaranteed, and the stability thereof is improved.

Pile column type concrete hollow pile pier structure

The invention discloses a bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier, and belongs to the field of bridge engineering. The bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier comprises precast rectangular concrete filled steel tube sections, pre-buried nodes, connecting plates, high-strength bolts and core penetration bolts; each precast concrete filled steel tube section consists of a steel tube section, concrete, reserved core penetration bolt hole channels, reserved bolt holes, precast screw caps, a sealing material and PVC (Polyvinyl Chloride) tubes; each pre-buried node consists of a precast rectangular concrete filled steel tube section, a foot plate, outside-stiffened ribs and anchor bolts; bolt holes and core penetration bolt holes are formed in each connecting plate according to bolt design positions; adjacent precast concrete filled steel tube sections are connected with each other by the connecting plates, the high-strength bolts and the core penetration bolts. The bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier has the characteristics of high anti-pressure and anti-shear bearing capacity, excellent anti-seismic property, easiness in factory production, convenience and rapidness in site operation, energy conservation, environmental friendliness and the like.

Bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier

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

A segment-assembled type pier column member with a steel-concrete composite structure includes a reinforcement tube embedded in a pile cap, wherein the reinforcement tube is connected with a bottom of a lower segment of a hollow steel tube pier and is poured with concrete, and pier columns in upper and lower segments are reinforced by means of segment connecting and being embedded with local reinforcing meshes. A steel cross beam is connected with an upper segment of the hollow steel tube pier in an assembled way. A pre-stressed tensioning duct is reserved between the steel cross beam and the pier column in the upper segment.

Assembled type pier column member with steel-concrete composite structure

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 pile type concrete hollow pile bridge pier structure. The pile type concrete hollow pile bridge pier structure is characterized by comprising a concrete hollow pile bridge pier, a bridge bracket, a bridge cover beam and a foundation bearing platform, a flange disc is arranged at the lower end of the concrete hollow pile bridge pier and provided with reserved bolt holes, the flange disc is connected with the foundation bearing platform, the flange disc and the foundation bearing platform are arranged in cast-in-place concrete, the upper surface and the lower surface of the bracket are provided with a bridge bracket upper steel board and a bridge bracket lower steel board respectively, a flange disc is arranged at the upper end of the concrete hollow pile bridge pier and connected with the bridge bracket lower steel board, and the bridge bracket upper steel board is connected with the bridge pier cover beam. The pile type concrete hollow pile bridge pier structure has the advantages that the concrete hollow pile bridge pier can be produced in a factory in a prefabricated mode, the length of the bridge pier can be accurately controlled, the bearing capacity of the bridge pier is improved, the concrete hollow pile bridge pier and the foundation bearing platform are connected through the flange discs, a core insert reinforcing cage and the cast-in-place concrete, connection intensity of the bridge pier is ensured, and stability of the bridge pier is improved.

Pile type concrete hollow pile bridge pier structure

The invention relates to a construction method of a breakwater in a pile-supported cylindrical caisson structure. Connection of a multi-segment pile and sinking of thereof are finished by sinking a lower cylindrical caisson under negative pressure. The pile-supported cylindrical caisson structure comprises an upper cylinder with reserved pile holes, a lower cylinder with compartments and foundation piles; the foundation piles penetrate the reserved pile holes of the upper cylinder and are connected with the upper cylinder through concreting to form an integrated structure; a bottom plate of the upper cylinder is a cover plate of the lower cylinder; the cover plate is provided with reserved ducts for valve control. The construction method has the advantages that the advantages of the cylindrical caisson structure, the caisson structure and the foundation pile structure are given to full play; after the lower cylinder is sunk into the earth, horizontal bearing capacity of the foundation structure can be improved; the foundation pile structure allows higher vertical bearing capacity for a foundation; after the upper cylinder is filled with backfill, structural stability can be improved and wave impact resistance can be improved.

Construction method of breakwater in pile-supported cylindrical caisson structure

The utility model relates to a pile-supporting caisson cylinder bulwark structure. The bulwark structure is characterized by comprising an upper cylinder, a lower cylinder and foundation piles, wherein the upper cylinder is provided with reserved pile holes and compartments, and the lower cylinder is provided with compartments. The upper cylinder and the lower cylinder are in poured connection to form a pile-supporting structure. The foundation piles penetrate through reserved pile holes of the upper cylinder and are connected with the pile-supporting structure through poured concrete to form an integrated pile-supporting caisson cylinder structure. The compartments are formed in the upper cylinder and the lower cylinder through concrete partition plates or steel partition plates. A bottom plate of the upper cylinder is a cover plate of the lower cylinder, and the cover plate is provided with reserved hole passages controlled by valves. The bulwark structure has the advantages that the advantages of the caisson cylinder structure, a caisson structure and a foundation pile structure are fully utilized; after sinking into a mud surface, the lower cylinder can improve the horizontal supporting force of a foundation structure; the foundation pile structure can improve the vertical supporting force of foundations; after the upper cylinder structure is filled with backfills, structural stability and the ability to resist wave impact can be improved.

Lu Mingyue

Papers

Pile column type concrete hollow pile pier structure

Steel cylinder type foundation structure of offshore wind turbine

Pile type concrete hollow pile bridge pier structure

Construction method of breakwater in pile-supported cylindrical caisson structure

Pile-supporting caisson cylinder bulwark structure