31results about How to "Eliminate the demoulding process" patented technology

The invention discloses a cover die for construction of a composite-section ribbed floor and a construction method thereof. The cover die comprises two cylinders or one cylinder and one box or two boxes, wherein each cylinder is of a cylindrical surrounding body structure of which the upper part and lower part are communicated; the cylinders comprise a cylinder I and/or a cylinder II; each box isof a cavity body structure of which one end is opened and the other end is sealed; the boxes comprise a box I and/or a box II; the cylinder I is sheathed above the exterior of the cylinder II, and/orthe box I is sheathed above the exterior of the cylinder II, and/or the box I is sheathed above the exterior of the box II; a lower flange die cavity of a cast-in-situ concrete rib is formed between the cylinder and/or the box; a web plate die cavity of a cast-in-situ concrete dense rib is formed between the adjacent cylinders and/or the boxes. One of the cover die is reserved in a reinforced concrete prefabricated rib cylinder or box, and the other one is a detachable and repeatedly used cylinder die, or is a prefabricated concrete cylinder reserved in the floor. The cover die is a construction die with the advantages that the production is simple; the construction is convenient; the construction period is short; the manufacturing cost is low; the good use effect is obtained.

The invention relates to a seamless connection system for an assembled steel structure beam-column member and a floor bearing plate and a construction method. The seamless connection system comprisesa prefabricated steel bar truss deck, a steel I-beam, an upper chord connecting reinforcement, a lower chord connecting reinforcement, additional reinforcements, a column-side connection profile steelpart and a profile steel column, wherein the steel I-beam is fixed to a lower part of the steel bar truss deck; the upper and lower chord connecting reinforcements are arranged on an upper part and alower part of the steel bar truss deck respectively; the additional reinforcements are arranged on the top and at the bottom of the steel bar truss deck respectively; the column-side connection profile steel part is connected with the steel bar truss deck; the profile steel column is welded together with the column-side connection profile steel part; the steel bar truss deck comprises a bottom die steel plate and a plurality of spatial steel bar trusses which are fixed to the bottom die steel plate at intervals; the spatial steel bar trusses comprise upper chord reinforcements, lower chord reinforcements and web member reinforcements; one upper chord reinforcement and two lower chord reinforcements are fixed by a plurality of web member reinforcements; the web member reinforcements are arranged along the widths of the spatial steel bar trusses at intervals; and the lower chord reinforcements extending along the longitudinal directions of the spatial steel bar trusses are arranged below two sides of the upper chord reinforcements respectively.

The invention discloses an unbonded prestress and steel-concrete composite reinforcement design method for concrete T-shaped beams. The unbonded prestress and steel-concrete composite reinforcement design method includes steps of firstly, determining unbonded prestress and steel plate-concrete composite reinforcement structures for the reinforcement T-shaped beams; secondly, determining structural parameters of the T-shaped beams prior to reinforcement; thirdly, determining structural parameters of the composite reinforcement structures, to be more specific, initializing the parameters, computing the maximum theoretical thicknesses of reinforcement steel plates, determining the thicknesses of the reinforcement steel plates and the thickness of concrete and determining the heights of longitudinal side steel plates and the widths of bottom steel plates. Each composite reinforcement structure comprises the corresponding bottom steel plate, the two longitudinal side steel plates and a steel bushing case, each steel bushing case comprises two end blocking steel plates, and a plurality of unbonded prestress reinforcing steel bars are arranged in each steel bushing case. The unbonded prestress and steel-concrete composite reinforcement design method has the advantages that the steps are simple, the unbonded prestress and steel-concrete composite reinforcement design method is reasonable in design and convenient to implement, good service effects can be realized, the structural parameters of the bridge composite reinforcement structures can be easily, conveniently and quickly determined, the bridge composite reinforcement structures designed by the aid of the unbonded prestress and steel-concrete composite reinforcement design method are economical and practical, and good reinforcement effects can be realized by the bridge composite reinforcement structures.

The invention discloses an accelerating agent, which is characterized by consisting of the following raw materials in part by weight: 10 to 30 parts of limestone, 18 to 36 parts of bauxite, 3 to 5 parts of desulfurated gypsum residue, 25 to 50 parts of fly ash, 6 to 15 parts of high-efficiency water reducing agent and 0.05 to 0.1 part of exciting agent, wherein the high-efficiency water reducing agent is a naphthalene sulfonate high-efficiency water reducing agent, and the exciting agent is mixed by lauryl sodium sulfate and methylcellulose according to a mass ratio of 1:1. The accelerating agent has high impermeability and freezing resistance and low rebound rate, is easy, convenient and practicable to construct and has no harm to skin and eyes of a constructor. Meanwhile, the desulfurated gypsum residue is used as a raw material, the secondary utilization of the desulfurated gypsum residue is realized, resources are saved, the problem of treating solid waste residue in an electric power plant is solved and the environment is protected.

The invention discloses a box girder unbonded prestressing and steel plate-concrete combination reinforcing design method. The method comprises the following steps that firstly, a combination reinforcing structure is determined, specifically, the reinforced box girder unbonded prestressing and steel plate-concrete combination reinforcing structure is determined, the combination reinforcing structure comprises a steel jacket case composed of a bottom steel plate, two longitudinal side steel plates and two end blocking steel plates, and a plurality of unbonded prestressed rebars are arranged in the steel jacket case; secondly, box girder structural parameters are determined before reinforcement; and thirdly, structural parameters of the combination reinforcing structure are determined, specifically, the parameters are initialized, the theoretical maximum thickness of the reinforcing steel plates is calculated, the thickness of the reinforcing steel plates and the thickness of concrete are determined, and the height of the longitudinal side steel plates and the width of the bottom steel plate are determined. The method is simple in step, reasonable in design, convenient to implement and good in application effect, the structural parameters of the bridge combination reinforcing structure can be determined easily, conveniently and rapidly, and the designed bridge combination reinforcing structure is economical, practical and good in reinforcing effect.

The invention discloses an unbounded prestress and steel plate-concrete combined reinforcing design method of a T-type beam. The method comprises the steps that first, a combined reinforcing structure is determined, specifically, the unbounded prestress and steel plate-concrete combined reinforcing structure of the reinforced T-type beam is determined and comprises a steel jacket box composed of a bottom steel board, two longitudinal side steel boards and two end portion sealing steel boards, and a plurality of unbounded prestress steel bars are arranged inside the steel jacket box; second, the structure parameters of the T-type beam are determined before reinforcement; and third, the structure parameters of the combined reinforcing structure are determined, specifically, the parameters are initialized, the maximum theory thickness of reinforcing steel boards is calculated, the thickness of the reinforcing steel boards and the thickness of concrete are determined, and the height of the longitudinal side steel boards and the width of the bottom steel board are determined. The method is simple in step, reasonable in design, convenient to implement, good in use effect, and capable of determining the structure parameters of the bridge combined reinforcing structure easily, conveniently and rapidly, and the designed bridge combined reinforcing structure is economical, practical and good in reinforcing effect.

The invention discloses a slip form lifting frame, which relates to a construction device and comprises a lifting frame body in a shape like a Chinese character 'ka'. The lifting frame body consists of a horizontally-arranged top cross beam, a support beam parallel to the top cross beam and two vertically-arranged columns. The top cross beam and the support beam are made of No.12 channel steel, two jacks are arranged on the upper surface of the support beam, and support rods are arranged on the jacks and is formed by welding steel pipes according to the diameter of phi 48*3.5mm. The surfaces of the top cross beam, the support beam, the columns and the support rods are all provided with glass reinforced plastic anticorrosive layers. The slip form lifting frame can be used for implementing slip form construction, reducing input of delivery pumps, tower cranes and other devices and lighting device weight. In addition, concrete is continuously operated, no construction joint exists, project quality is reliable, construction process is quick, work efficiency is improved, construction safety is guaranteed, and the slip form lifting frame has practical applicability.