Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

2314 results about "Precast concrete" patented technology

Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and lifted into place ("tilt up"). In contrast, standard concrete is poured into site-specific forms and cured on site. Precast stone is distinguished from precast concrete using a fine aggregate in the mixture, so the final product approaches the appearance of naturally occurring rock or stone. More recently expanded polystyrene is being used as the cores to precast wall panels. This is lightweight and has better thermal insulation.

Node connection device for self-centering prestressed concrete frame

InactiveCN101798849ASolve local pressure problemsEliminate or reduce residual deformationShock proofingResidual deformationWhole body
The invention relates to a node connection device for a self-centering prestressed concrete frame. The node connection device is a device used for the connection between the beam and the column of a prefabricated reinforced concrete frame, and aims at improving energy consumption of a frame structure under seismic action and eliminating or reducing the residual deformation and damage of the frame structure. The connection device is characterized in that combined steel parts form an energy consuming device, two external friction steel plates (3) are arranged in the energy consuming device, are respectively and symmetrically arranged on the two sides of a column end reinforcing steel plate (4) and are connected with the column end reinforcing steel plate (4) into a whole body, two internal friction steel plates (8) are arranged between the two external friction steel plates (3), the upper end and the lower end of each internal friction steel plate (8) are respectively provided with a bean end reinforcing steel plate (5), friction discs (15) are respectively arranged between the two internal friction steel plates (8) and the two external friction steel plates (3), and friction-type high-strength bolts (12) penetrate through the external friction steel plates (3), the friction discs (15), the internal friction steel plates (8) and a prefabricated concrete beam (2) and connect all parts together.
Owner:SOUTHEAST UNIV

Assembled monolithic shear wall building structure and construction method thereof

The invention relates to an assembled monolithic shear wall building structure and a construction method thereof, and belongs to the technical field of buildings and construction thereof. The assembled monolithic shear wall building structure is formed by connecting prefabricated concrete members which comprise a prefabricated wall plate member, a floor member, a T-shaped wall column member, an L-shaped wall column member, a cross wall column member and a wall member with an opening. The structure is characterized in that a plurality of longitudinal through holes which are parallel to the surface are formed in each prefabricated concrete member; transverse grooves crossed with at least one longitudinal hole are formed on the longitudinal edge at intervals; transverse anchoring steel bars are arranged at the transverse grooves among different prefabricated members; longitudinal anchoring steel bars are arranged in the longitudinal holes; a layer of structural unit or a single-layer building structure is formed by filling concrete in the longitudinal holes and the transverse grooves; and a plurality of structural units are connected to form a multi-layer or high-rise assembled monolithic shear wall structure. The structure can be used in a multi-layer or high-rise shear wall building structure and a frame-shear wall building structure, the industrial level of the building structure can be improved, stress performance is improved, and resources are saved.
Owner:初明进

Fractured rock mass stress and seepage coupled testing system and method

InactiveCN104316447AEffective testing methodChange stress statePermeability/surface area analysisHydraulic cylinderThree degrees of freedom
The invention discloses a fractured rock mass stress and seepage coupled testing system and a fractured rock mass stress and seepage coupled testing method, belonging to testing systems and methods for fractured rock mass or pore medium seepage of rock and soil and geology. The system is divided into three parts, namely a seepage experiment device, a stress and displacement loading system and a data acquisition system, wherein the seepage experiment device can load square fractured rock mass or precast concrete crack samples, and a water pump provides power to form a test loop seepage channel; a control valve, an energy accumulator, a filtering device and a pressure and flow sensor are arranged on a water inlet/outlet pipe connected with the seepage experiment device; the stress and displacement loading system is equipped with a hydraulic cylinder driven by an oil pump and a trapezoidal screw; the hydraulic cylinder and the trapezoidal screw are matched with the pressure and flow sensor, so that the pressure and displacement can be accurately regulated and controlled; an unrelated three-degree-of-freedom sliding system is formed by a flange bearing, a cylindrical pin and a small ball, so that loading is not interfered by friction and other adverse factors; and moreover, all data in the experimental process is acquired and recorded by the data acquisition system in real time.
Owner:CHINA UNIV OF MINING & TECH

Tunnel lining self waterproof drainage system

The invention relates to a tunnel lining self waterproof drainage system, which comprises a surrounding rock bearing arch, a cast-in-place cement main waterproof layer, a pre-cast cement arch sheet layer and longitudinal drainage channels. Arch sheet layer construction gaps and cast-in-place cement main waterproof layer construction gaps are interlaced. The tunnel lining self waterproof drainage system is characterized in that movable drainage grooves are fixedly arranged below the pre-cast cement arch sheet layer of centralized bursting water seepage points of loose surrounding rocks, and form arch sheet drainage spaces with an inwards concave surface of the pre-cast cement arch sheet layer, the parallel drainage spaces distributed along the section of a tunnel form a movable drainage channel, the longitudinal drainage channels are communicated and are arranged on two sides of the movable drainage channel and the pavement of the tunnel, pre-embedded water guiding pipes are arranged at the centralized bursting water seepage points, a water outlet end of each pre-embedded water guiding pipe is arranged on the inwards concave surface of the pre-cast cement arch sheet layer, and pre-embedded grouting pipes are arranged outside the pre-embedded water guiding pipes. The invention completely solves stubborn problems of the tunnel on cracking, seeping, frost heaving, ponding or freezing and the like on the premise of not arranging an interlayer waterproof layer and a hidden seepage water blind pipe drainage system, and the tunnel lining self waterproof drainage system disclosed by the invention has a simple structure and is convenient to construct.
Owner:中国市政工程西北设计研究院有限公司

Steel-concrete composite beam adopting corrugated steel web and construction method thereof

The invention discloses a steel-concrete composite beam adopting a corrugated steel web, which relates to a corrugated steel web composite beam capable of being applicable to highway bridges and railway bridges. The beam comprises a top flange concrete composite plate, a corrugated steel web plate, a top flange steel plate, a box beam bottom plate and male pin connecting pieces, wherein the top flange comprises a precast concrete slab and a cast-in-place concrete layer; and the top flange concrete composite plate is connected with the top flange steel plate into a whole through the male pin connecting pieces welded on the top flange steel plate. By adopting the structure, the problems that the site workload and the construction difficulty for casting a bottom flange concrete slab of a traditional corrugated steel web composite beam are large, the construction quality is difficult to guarantee and the like are overcome on the premise that the quantity of steel is hardly increased, meanwhile, the tensile property of the steel plate is fully played, the bearing capacity, the rigidity and the cracking resistance of the structure are improved, and the durability of the structure is improved, therefore, the corrugated steel web composite beam has the advantages of simple structure, reasonable stress, quick and convenient construction, and good technical and economic benefits.
Owner:TSINGHUA UNIV

Pre-stressing-force fabricated concrete-frame-joint connecting structure and construction method thereof

The invention relates to the technical field of fabricated concrete frame structures, and discloses a pre-stressing-force fabricated concrete-frame-joint connecting structure and a construction method thereof. The pre-stressing-force fabricated concrete-frame-joint connecting structure comprises a prefabricated concrete column, a prefabricated concrete superposed beam, a composite floor slab, a post-tensioned pre-stressing tendon, an anti-bending and energy-consuming reinforcing steel bar and a shear-resistant and high-strength reinforcing steel bar, wherein the post-tensioned pre-stressing tendon, the anti-bending and energy-consuming reinforcing steel bar and the shear-resistant and high-strength reinforcing steel bar are connected with the prefabricated concrete column and the prefabricated concrete superposed beam. A beam post-pour layer of the prefabricated concrete superposed beam and a slab post-pour layer of the composite floor slab are poured integrally, the inner portion of a beam column seam between the prefabricated concrete superposed beam and the prefabricated concrete column is filled with high-strength crack-pouring binding materials, the anti-bending and energy-consuming reinforcing steel bar and the shear-resistant and high-strength reinforcing steel bar are laid in the beam post-pour layer of the upper portion of the prefabricated concrete superposed beam, and the anti-bending and energy-consuming reinforcing steel bar is located above the shear-resistant and high-strength reinforcing steel bar. According to the pre-stressing-force fabricated concrete-frame-joint connecting structure and the construction method thereof, efficient construction can be achieved, the anti-seismic property and the progressive-collapse-resistant capability are good, and post-earthquake repairing is facilitated.
Owner:CHINA STATE CONSTRUCTION ENGINEERING CORPORATION +1

Friction energy consumption type node connection device for self-centering pier column structure

InactiveCN101936043AImprovement of local pressure problemsImprove performanceShock proofingPile capResidual deformation
The invention relates to a friction energy consumption type node connection device for a self-centering pier column structure, which is a device used for connecting a bridge pier or a frame column with a pile cap (a foundation), so as to improve the energy consumption of the pier column structure under the action of earthquake and eliminate or reduce the residual deformation and the injuries of the structure. The device comprises a pier column strengthening steel plate, a foundation pre-embedded steel plate, an angle steel, a friction bolt, a friction plate, unbonded prestressed tendons, an anchor bolt and the like. The device can connect a concrete pier column and the foundation into a whole through the unbonded prestressed tendons which are vertically arranged. When the earthquake strength achieves a certain degree, the pier column-foundation contact surface is open, and the pier column can produce a certain rotation relative to the foundation. A friction device can dissipate earthquake energy through friction at this time, and the prestress provided by the prestressed tendons can recover the structure to the initial position after the earthquake. A pre-embedded part at the end part of the pier column is used for improving the local bearing pressure of the concrete when the pier column rotates relatively.
Owner:SOUTHEAST UNIV

Reinforced concrete structure based on 3D printing and structure construction method

The invention discloses a reinforced concrete structure based on 3D printing and a structure construction method. The method comprises the following steps that a foundation bottom plate is constructed, and a connection section is reserved on the foundation bottom plate; a steel bar structure of a structural column is bound to the connection section; a first prefabricated concrete outer shell is manufactured by adopting 3D printing, and concave-convex lines are formed in the inner surface of the first prefabricated concrete outer shell; the first prefabricated concrete outer shell is arranged on the steel bar structure of the structural column in a sleeved mode; a steel bar structure of a structural beam is bound, and the steel bar structure of the structural beam is bound to the steel bar structure of the structural column; a second prefabricated concrete outer shell is manufactured by adopting 3D printing; the second prefabricated concrete outer shell is mounted on the steel bar structure of the structural beam; concrete is poured in the second prefabricated concrete outer shell, and the structural beam and the structural column are completed. The prefabricated concrete outer shells are formed integrally by adopting a 3D printing technology, the continuous concave-convex lines are formed in the inner surfaces of the prefabricated concrete outer shells, the contact surfaces between the concrete poured in the prefabricated concrete outer shells and the inner surfaces of the prefabricated concrete outer shells are enlarged, compared with a smooth inner surface, friction is increased, bonding strength is improved, and a shell disengagement phenomenon is avoided.
Owner:CHINA CONSTR EIGHT ENG DIV CORP LTD

Nano-suspension concrete early strength accelerator and preparation method thereof

ActiveCN104803625AImprove early strengthGood early strengthCalcium silicateRebar
The invention provides a nano-suspension concrete early strength accelerator which can be stably dispersed in an aqueous solution and is prepared from a thixotropic solution and a nano-calcium silicate suspension according to mass ratio of 1:4-9. The thixotropic solution is prepared from the following ingredients, by weight, 15-25% of soluble fluosilicate, 20-35% of soluble aluminium salt and the balance being water. The nano-calcium silicate suspension is prepared from the following ingredients, by weight, 5-20% of soluble silicate, 8-18% of soluble calcium salt, 3-10% of a high-molecular polymer dispersant and the balance being water. The invention also provides a preparation method of the early strength accelerator. On one hand, the early strength accelerator contains no chlorine salt and has no corrosion effect on steel bars in concrete. On the other hand, the early strength accelerator is a stable suspension system, is convenient to add and is easy to uniformly disperse during the preparation process of concrete; and the early strength accelerator can remarkably raise early strength of concrete, has an obvious early strength effect especially on concrete obtained by the use of high volume of mineral admixtures and is especially suitable for production of precast concrete components.
Owner:JIANGSU SOBUTE NEW MATERIALS

Connectors and Methods of Construction for a Precast Special Concrete Moment Resisting Shear Wall and Precast Special Concrete Moment Resisting Frame Building Panel System

InactiveUS20080098676A1Saving environment protectionThermally efficientMoulding surfacesBuilding roofsComposite constructionInternational Building Code
A precast concrete wall panel molding system for fabricating a wall shell and a plurality of ribs and beams. A precast concrete wall panel molding system with facilities for incorporating door and window frames. A ductile panel end connector for attaching panels one to another whether in parallel or angled as in inside or outside corners. A ductile panel end connector for attaching panels to columns. A wall anchor/shear plate with post-tensioning brace plate. A hybrid precast/cast-in-place special moment resisting shear wall/special moment resisting frame reinforced concrete building system for regions of potential seismic activity. A prescriptive method building system for composite structural building assemblies with conventional wood and light-gauge steel framing, structural steel, and other building code approved and tested building systems, building components, building panel systems, building roofing systems, modular and manufactured buildings, and building electrical, mechanical, and plumbing systems. A precast concrete wall panel system conforming to industry practices and standards as published by the Precast/Prestressed Concrete Institute, (PCI) in it's “PCI Design Handbook” (fifth edition, 1999), the American Concrete Institute “Building Code Requirements for Structural Concrete” (ACI 318-05), The “International Building Code 2006” and the “Uniform Building Code”.
Owner:HUTCHENS JOHN FRANCIS

Corrugated steel webplate combined box girder floor system for cable-stayed bridge and construction method thereof

InactiveCN101864729AAvoid on-site molding processReduce wet work workloadCable-stayed bridgeBridge structural detailsCrack resistanceEngineering
The invention relates to a corrugated steel webplate combined box girder floor system for a cable-stayed bridge and a construction method thereof, and belongs to the technical field of bridge structures. The corrugated steel webplate combined box girder floor system comprises a precast concrete plank and a cast-in-place concrete seam, wherein the precast concrete plank is positioned on a steel box girder and is integrated with the steel box girder into a whole; the steel box girder is formed by welding a top flange steel plate, a corrugated steel webplate and a steel plate at the bottom of the box girder; a box girder baseplate stiffening rib and a diaphragm plate are welded in the steel box girder; the diaphragm plate comprises a top flange steel plate of the diaphragm plate and a steel webplate of the diaphragm plate; a toggle pin connecting piece is welded on the top flange steel plate and the top flange steel plate of the diaphragm plate; and a steel anchor pulling plate and a steel sleeve are welded on the top flange steel plate. The corrugated steel webplate combined box girder floor system simplifies the manufacturing process for the precast concrete plank, gives full play to the superior mechanical property of the corrugated steel webplate and the release action of the corrugated steel webplate on the creep effect of concrete shrinkage, improves the bearing capacity, stiffness and crack resistance of the structure, and improves the durability of the structure.
Owner:TSINGHUA UNIV

Prefabricated assembled superposed plate type concrete shear wall and construction method thereof

The invention relates to a prefabricated assembled superposed plate type concrete shear wall and a construction method thereof. The prefabricated assembled superposed plate type concrete shear wall comprises superposed wall plates and a cast-in-place concrete core wall, wherein each superposed wall plate is formed by superposing two prefabricated concrete single wall plates which are of the same specification and are symmetrically arranged at an equal interval; supporting plate steel bar supports are arranged between the two single wall plates; node connection reinforcement steel bars are arranged on end nodes of the superposed wall plates; the superposed wall plates are fixedly integrated with the cast-in-place concrete core wall; and the superposed wall plates, the cast-in-place concrete core wall, the supporting plate steel bars and the node connection reinforcement steel bars are fixedly connected with one another to form the shear wall structure. The invention also provides a construction method for the shear wall structure. By the construction method, when an extensive form building mode is changed, and structural members of a house are standardized and modularized, engineering construction is high in speed, and materials are saved; and the overall structural performance is high.
Owner:ANHUI HUALI CONSTR GRP

Assembly integral shear wall building structure and building method

The invention relates to an assembly integral shear wall building structure and a building method and belongs to the field of buildings and construction technologies of the buildings. The shear wall building structure is formed by connecting prefabricated concrete hollow components through steel bars and cast-in-place concrete, wherein the prefabricated concrete hollow components include prefabricated wall body components, floor board components, T-shaped wall pillar components, L-shaped wall pillar components, cross-shaped wall pillar components and wall body components with holes. Multiple parallel lengthwise through holes are formed in the prefabricated hollow components in the length direction and multiple parallel transverse non-through holes communicated with the lengthwise through holes are formed in the prefabricated hollow components in the width direction. Horizontal anchor connection steel bars inserted into the transverse holes are arranged among the different prefabricated components. Lengthwise anchor connection steel bars are arranged in the lengthwise holes, wherein one end of each lengthwise anchor connection steel bar protrudes out of the surface of the corresponding prefabricated component by a certain length. The concrete is filled into the lengthwise holes and the transverse holes to form a layer of structural unit or a single-layer building structure. Multiple structure units are connected to form a multiple-layer or high-rise assembly integrated shear wall structure. The assembly integral shear wall building structure and the building method can be applied to the multiple-layer or high-rise shear wall building structures and frame-shear wall building structures. Thus, the industrial level of the building structures can be improved, stress performance can be improved and resources are saved.
Owner:初明进

Novel assembling type precast concrete urban comprehensive pipe gallery and construction method thereof

The invention discloses a novel assembling type precast concrete urban comprehensive pipe gallery and a construction method thereof. The novel assembling type precast concrete urban comprehensive pipe gallery comprises a plurality of inverted u-shaped cover plates and a plurality of substrate plates, wherein each inverted u-shaped cover plate comprises a cross plate, a left vertical plate and a right vertical plate; each substrate plate comprises a bottom plate, a left convex plate and a right convex plate; the middle position of each left convex plate and each right convex plate is provided with troughs; each left vertical plate and each right vertical plate are respectively installed in each left convex plate and each right convex plate; the middle position of each bottom plate is provided with a central drain. The construction method of the novel assembling type precast concrete urban comprehensive pipe gallery comprises the following steps: preparing prefabticated members; excavating and timbering a foundation pit; laying a cushion ply; connecting the inverted u-shaped cover plates with the substrate plates; connecting the inverted u-shaped cover plates, and connecting the substrate plates; tensioning, smearing gaps, backfilling and carrying out form stripping. The novel assembling type precast concrete urban comprehensive pipe gallery has the advantages of convenience in transportation, construction and maintenance, simpleness in operation and high construction efficiency, and the structural integrity and stability of a gallery body can be improved, and the water resistance and water discharging performances of the pipe gallery can be improved.
Owner:NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products