Chen Qiang

Bio: Chen Qiang is an academic researcher. The author has contributed to research in topics: Pile & Foundation (engineering). The author has an hindex of 6, co-authored 40 publications receiving 151 citations.

Movable steel platform for offshore construction work

Abstract: The invention relates to a movable steel platform for offshore construction work. The movable steel platform is characterized by comprising a platform steel plate, steel vertical columns, trusses and caisson cylinders; the steel vertical columns are connected with the top ends of the caisson cylinders at the lower portions; the connecting trusses are arranged between the steel vertical columns; the platform steel plate is arranged at the top ends of the steel vertical columns and the trusses; reserved holes are formed in the top ends of the caisson cylinders. The movable steel platform has the beneficial effects that compared with the prior art, the movable steel platform can be completely prefabricated on land, offshore splicing work time is shortened, and the movable steel platform is not affected by wind waves in the construction work process; the vacuumizing negative pressure sinking construction process of the caisson cylinder structure is fully utilized, and the purposes of convenient and quick installation and movement are achieved; the installation efficiency is improved, and the manufacturing cost of the movable steel platform is reduced.

Rotary-type overwater piling guide frame and piling process for overwater pile group foundations

Abstract: The invention relates to a rotary-type overwater piling guide frame which comprises a positioning pile. The rotary-type overwater piling guide frame is characterized in that a positioning pile upper layer flange plate is fixedly connected to the upper end of the positioning pile; a positioning pile lower layer flange plate is fixedly connected to the lower end of the positioning pile; an upper layer guide frame base and a lower layer guide frame base are fixedly connected to the positioning pile upper layer flange plate and the positioning pile lower layer flange plate respectively; upper layer guide frame base bolt holes and lower layer guide frame base bolt holes are formed in the upper surface of the upper layer guide frame base and the upper surface of the lower layer guide frame base respectively; an upper layer guide frame outward telescoping mechanism and a lower layer guide frame outward telescoping mechanism are fixed to the upper layer guide frame base and the lower layer guide frame base through bolts respectively. The process comprises the steps that 1, the rotary-type overwater piling guide frames are installed in the central positions of pile groups to serve as an operating platform and a measuring platform, and the plane position, the inclination and the elevation of foundation piles can be made to be adjusted through the rotary-type overwater piling guide frames; and 2, pile-sinking construction is conducted on the foundation piles by hoisting pile hammers through full-circle slewing hoisting equipment, the telescopic distance and the rotation angle of the piling guide frames are adjusted, and hence pile group constructing can be conducted. The rotary-type overwater piling guide frame and the process have the beneficial effects that accurate positioning of the foundation piles can be achieved, inclined piles of arbitrary radius and angle are piled, and all pile group foundations are piled through ship lingering at a time.

Portable steel platform of marine construction operation

Abstract: The utility model relates to a portable steel platform of marine construction operation, characterized by: including platform steel sheet, steel stand, truss, box bucket, the steel stand is connected with lower part box bucket top, be equipped with the connection truss between the steel stand, the platform steel sheet sets up the top at steel stand and truss, the box bucket top is equipped with reserves the pore Beneficial effect: compared with the prior art, the utility model discloses can realize land prefabricatedly totally, reduce the marine concatenation activity duration, not influenced by the stormy waves, make full use of the box bucket structure take out the submerged construction process of vacuum negative pressure, realized convenient and fast installation and the purpose that moves, improved the installation effectiveness, reduced the cost of portable steel platform

Wall pile framework structure

Abstract: The utility model relates to a wall pile framework structure. The wall pile framework structure is characterized by comprising a framework and a wall pile, wherein a plurality of wall pile holes are formed in front and rear end beams of the framework along the lengthways direction; the wall pile penetrates through the wall pile holes; the framework is arranged at the upper part of the wall pile; backfilling materials are arranged inside the framework. The wall pile framework structure has the beneficial effects that a hydraulic structure adopts the wall pile framework structure and has the advantages of strong adaptability, high member prefabrication degree and simplicity and convenience in construction of a traditional pile type structure; meanwhile, the disadvantages that the durability of the pile type structure is poor and the bearing capability is low are overcome. Compared with a gravity type structure, the wall pile framework structure has the advantage of strong foundation adaptability. Compared with an inclined slope type structure, the wall pile framework structure uses less gravel amount and is particularly suitable for coastal sludge foundation coasts of China, such as Tianjin and Shanghai areas. The wall pile framework structure can be used as a main body structure of a bulwark, a reclamation dam, a wharf and shore protection engineering.

Industrial factory building framework structure adopting prefabricated concrete post structure

Abstract: The invention relates to an industrial factory building framework structure adopting a prefabricated concrete post structure. The industrial factory building framework structure is characterized by comprising a plurality of prefabricated concrete posts, a foundation bearing platform, connecting beams, flanges and a house frame, wherein the prefabricated concrete posts are connected with the foundation bearing platform through bottom flanges, the middle parts of the prefabricated concrete posts are provided with middle lower part flanges and middle upper flanges, the connecting beams and crane beams are connected between the middle lower flanges and the middle upper flanges of the prefabricated concrete posts, the prefabricated concrete posts are connected into an integral industrial factory building framework structure through the connecting beams, the prefabricated concrete posts are connected with the house frame through top end flange and house frame flanges, and the foundation bearing platform is connected into the foundation of the integral industrial factory building framework structure through ground beams. The industrial factory building framework structure has the beneficial effects that the prefabricated concrete posts can realize the prefabricated production in factories, the quality of the posts is stable and reliable, the posts and the foundation are connected through the flanges, the connecting intensity of the prefabricated concrete posts can be ensured, and the construction period can be greatly reduced.

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

Abstract: 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.

Pile column type concrete hollow pile pier structure

Abstract: 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.

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

Abstract: 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.

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

Abstract: 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.

Concrete pipe pile automatic production line

Abstract: 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.