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 relates to a bag bottom expanding rigid-flexible combined pile. The bag bottom expanding rigid-flexible combined pile is formed by connecting the following prefabricated pipe piles including a TSC (prestress concrete thin wall concrete) pile, a PRC (prestress reinforcement concrete) pile and a PHC (prestress high-strength concrete) pile from top to bottom. The bottom end of the PHC pile is provided with a pile bottom expander packed by a bag; the inside of the prefabricated pipe piles is provided with a grouting duct; both ends of every pile is provided with perforated pipe pile joints, and the side wall of the pile at the bottom is provided with a grout outlet; the outside of the combined pile is packed by surrounding cemented soil. According to the bag bottom expanding rigid-flexible combined pile, based on the law of horizontal load bearing of the pile bodies inside soil, the prefabricated pipe piles with the anti-bending and anti-shearing performance gradually improved, which are connected in a combined mode, are sequentially planted inside the cemented soil, and the expanded is grouted after the bag with stable characteristics is set to improve the vertical bearing capacity of the piles, so that relatively higher technical and economical benefits can be obtained. The invention also discloses a construction method of the bag bottom expanding rigid-flexible combined pile.

Bag bottom expanding rigid-flexible combined pile and construction method thereof

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 discloses a concrete pipe pile automatic production line. The concrete pipe pile automatic production line is characterized by comprising a feeding region, wherein a concrete agitator and a distribution car are arranged in the feeding region; a mould combination region is arranged behind the feeding region; a crane which can move pipe moulds to the mould combination region is arranged between the feeding region and the mould combination region; a tensioning region is arranged behind the mould combination region; a tensioning machine is arranged in the tensioning region; a centrifugal region is arranged behind the tensioning region; a centrifugal machine is arranged in the centrifugal region; a normal temperature steaming and maintaining region is arranged behind the centrifugal region; a steaming and maintaining pond is arranged in the normal temperature steaming and maintaining region; a mould demounting region is arranged behind the normal temperature steaming and maintaining region; a releasing machine for demounting upper nuts of the pipe moulds is arranged in the mould demounting region; a woven cage region is arranged behind the mould demounting region; upper mould conveying chains and lower mould conveying chains for conveying the pipe moulds are respectively arranged on one sides or centers of the mould demounting region, the normal temperature steaming and maintaining region, a centrifugal region and a mould combination region, the crane is arranged between the woven cage region and the mould demounting region, and a high pressure steaming and maintaining region is arranged behind the woven cage region.

Concrete pipe pile automatic production line

The utility model relates to a windproof net upright column structure which is characterized by comprising a pile foundation, an upright column, a profile steel longitudinally connected with the outer surface of the upright column and a steel wire rope passing through the lateral round hole of the profile steel; a precast pile submerged underground is adopted as the pile foundation; the two end surfaces of the pile foundation and the upright column are respectively provided with end plates or pre-buried steel plates; the pile foundation and the upright column are fixedly connected by virtue of welding of the end plates or the pre-buried steel plates or a mechanical joint; the upper end of the profile is provided with a connecting plate; the connecting plate is fixedly connected with the upper end plate or pre-buried steel plate of the upright column; the joint of the pile foundation and the upright column is provided with a concrete cushion cap; the lower end of the profile steel is embedded into the concrete cushion cap. The windproof net upright column structure has the beneficial effects that the pile foundation and the upright column are connected to form a whole windproof net file foundation and upright column structure, so that the difficulty of whole long pile transportation can be avoided, and the transportation expenses are reduced; the concrete cushion cap is cast in place at the joint of the pile foundation and the upright column; the fixing mode of the profile steel can ensure that the profile steel cannot move or rotate, and the joint part of the pile foundation and the upright column can be protected by the concrete cushion cap.

Windproof net upright column structure

The utility model relates to a high bearing capacity pile foundation with a tubular pile inserted. The high bearing capacity pile foundation with the tubular pile inserted comprises the inserted tubular pile and a pile hole. The high bearing capacity pile foundation with the tubular pile inserted is characterized in that a casing pipe is installed in the pile hole and an expanded-base foundation is arranged at the bottom of the casing pipe. The high bearing capacity pile foundation with the tubular pile inserted has the advantages that a precast tubular pile is adopted, so that bearing capacity, construction rate and quality is guaranteed, according to technology of an immersed casing tube, potential safety hazard caused by collapse holes when the holes are formed and the pile is inserted, and environmental pollution caused by uncleaned slurry are further avoided. Due to the fact that the expanded-base foundation is ramming expanded, the bearing capacity of the pile foundation can be further increased. The pile foundation is simple in construction, high in speed, reliable in quality and high in bearing capacity. According to the immersed casing tube and a method of filling stuffing materials in the casing tube so as to carry out ramming expanding, to form the expanded-base foundation and to insert the pile, defects that construction period of expanded-base foundation pile filling of the immersed casing tube is long, construction quality is not prone to be controlled and traditional inserted piles are not capable of carrying out the ramming expanding to form the expanded-base foundation are effectively overcome, and therefore the bearing capacity of the pile foundation of the tubular pile is further improved.

High bearing capacity pile foundation with tubular pile inserted

The utility model relates to a hoop type mechanical quick connector for prestress concrete pipe piles The hoop type mechanical quick connector comprises a pipe pile end plate, and convex edges in an isosceles trapezoid shape are arranged on the outer circle of the pile end plate The hoop type mechanical quick connector is characterized in that a quick installation connecting mechanism is arranged on the outer circle of the periphery of the pipe pile end plate, the quick installation connecting mechanism comprises two semi-circular steel hoops and fastening bolts, inner circles of the two semi-circular steel hoops are provided with grooves matched with the convex edges on the outer circle of the pipe pile end plate, the inner circles of the two semi-circular steel hoops are matched with the outer circle on the periphery of the pipe pile end plate, connection lugs are respectively arranged on two lateral walls of the two semi-circular steel hoops, and the connection lugs is integrally formed with the semi-circular steel hoops The hoop type mechanical quick connector for prestress concrete pipe piles has the advantages that the a user only needs to form four bolt holes in the connection lugs at the outer end of the end plate and fastens the connection lugs through connection frame plates, work load is small, and connection is easy to achieve An upper pipe pile and a lower pipe pile can be adjusted to the same straight line, bolt hole positions of skirt boards of the upper pipe pile and the lower pipe pile do not need to be aligned, and construction efficiency is improved

Hoop type mechanical quick connector for prestress concrete pipe piles

The utility model discloses an assembling type pile which comprises a lower tubular pile body. A lower tubular pile reinforcement cage is arranged in the lower tubular pile body, an upper end plate is arranged at the upper end of the lower tubular pile body, a top tubular pile body is assembled at the upper end of the lower tubular pile body, a lower end plate arranged on the upper end plate in a press mode is arranged at the lower end of the top tubular pile body, the lower end plate is connected with the upper end plate, a top tubular pile reinforcement cage is arranged in the top tubular pile body, #-shaped combined hoops are arranged on the top tubular pile reinforcement cage every other 200-400 mm, and a post-poured concrete grouted core is arranged in the top tubular pile body. According to the assembling type pile, the upper section of prefabricated tubular pile body and the lower section of prefabricated tubular pile body are assembled together, and the advantages of the tubular pile bodies and the advantages of a bored pile are fused together through the mode that the post-poured concrete grouted core is poured in the top tubular pile body. The assembling type pile has the advantages that pile connection is easy, convenient and fast, the manufacturing cost is low, construction is quick, quality is easy to ensure, and the bearing capacity is high.

Assembling type pile

The invention relates to an offshore wind turbine foundation structure. The offshore wind turbine foundation structure is characterized in that the offshore wind turbine foundation structure comprises a plurality of steel pipe piles and a steel platform; the steel platform comprises upper beams, lower beams, upper longitudinal beams, lower longitudinal beams and a steel plate; the lower longitudinal beams are fixedly connected to the lower beams, the upper beams are fixedly connected to the upper portions of the lower longitudinal beams, and the upper longitudinal beams are fixedly connected to the upper portions of the upper beams; and the steel plate is fixedly connected to the upper portions of the upper longitudinal beams to form the integrated steel platform, the lower beams are fixedly connected with the tops of the steel pipe piles, and a steel platform foundation is formed by the steel pipe piles. A construction method includes the steps that the steel platform is built; a crawler crane is assembled onto the steel platform; locating piles are sunk; foundation piles are sunk; a concrete bearing platform is poured; and a tower drum and a fan are arranged. The offshore wind turbine foundation structure has the beneficial effects that it can be guaranteed that the crawler crane is not affected by the stormy waves when working on the steel platform, so that the difficulty of offshore pile foundation construction and tower drum and fan mounting construction is reduced, construction quality is guaranteed, construction efficiency is improved, the construction period can be shortened remarkably, the cost spent in large constriction ships is saved, the construction cost is lowered, and the offshore wind turbine foundation structure is low in cost and capable of being reused.

Chen Qiang

Papers

Windproof net upright column structure

High bearing capacity pile foundation with tubular pile inserted

Hoop type mechanical quick connector for prestress concrete pipe piles

Assembling type pile

Offshore wind turbine foundation structure and construction method thereof