38results about How to "Reduce dismantling process" patented technology

The invention provides a support-free formwork for reserved bolt holes of a roughing mill body and a construction method. The support-free formwork comprises a reserved hole box, wherein the reservedhole box comprises a bottom sealing plate, a plurality of threaded steel pipes and a top sealing plate; the threaded steel pipes are uniformly distributed between the top sealing plate and the bottomsealing plate; the top sealing plate is provided with top sealing plate holes corresponding to the upper ends of the threaded steel pipes; the upper ends of the threaded steel pipes penetrate throughthe top sealing plate holes and are fixedly connected with the top sealing plate; the bottom sealing plate is provided with bottom sealing plate holes corresponding to the lower ends of the threaded steel pipes; and the lower ends of the threaded steel pipes penetrate through the bottom sealing plate holes and are fixedly connected with the bottom sealing plate. According to the support-free formwork, the defects of wood formwork construction are effectively overcome, the overall rigidity of the formwork is improved through the threaded steel pipes, the formwork dismounting process is reduced,time and labor are saved, the threaded steel pipes and a concrete foundation are fixedly connected into a whole for use, the quality of the reserved bolt holes is guaranteed, and meanwhile, foundation bolts can be effectively prevented from being pulled out through threads of the threaded steel pipes.

The invention relates to a frame-shear wall structure building of a dismantling-free prefabricated reinforced concrete formwork and a construction method thereof, belonging to the technical field of buildings and construction thereof. The structure is a pure frame structure building formed through connecting a dismantling-free prefabricated reinforced concrete rectangular column formwork, a beam formwork and a floor system formwork with each other by using cast-in-place concrete, or a frame-shear wall structure building formed through connecting a dismantling-free rectangular column formwork,a beam formwork, a floor system formwork and a wall formwork with each other by using cast-in-place concrete; longitudinal and transverse through holes in parallel with the surface are arranged in each formwork; one building unit of a cast-in-place concrete frame-shear wall structure is formed by alternatively arranging reinforcing steels and filling concrete in the crossed through holes; and a multistoried or high-rise cast-in-place concrete frame-shear wall structure building is formed by one building unit or more building units which are combined. The frame-shear wall structure building has the advantages of being simple for machining and less in investment of production equipment, decreasing the construction processes, accelerating the construction, saving the manpower and the like.

The invention discloses a super-large-diameter overall movable metal formwork for a shaft, which includes a standard formwork, a lifting drive device, a deformation-preventing pre-embedded pressing mechanism and a demoulding mechanism. The anti-deformation pre-embedded pressing mechanism is installed on the standard formwork and the anti-deformation pre-embedded pressing mechanism is used to press the suspension ear plate of the formwork, and the demoulding mechanism is installed between two adjacent standard formworks. And the two adjacent standard formworks are demoulded or supported to open the mold under the action of the demoulding mechanism. This application can realize the synchronous lifting and lowering of the formwork by the lifting drive device or multiple ground stabilizer (winch) steel wire rope lifting points, and enhance the overall rigidity of the formwork and the ability to resist local deformation through the anti-deformation pressing device. It becomes smaller or larger within the elastic range, and can quickly complete the demoulding, lowering (or raising), vertical formwork pouring and other processes, saving the time for masonry well walls.

The invention discloses a construction method for a small-section vertical shaft without form removal. A plurality of annular thin-wall concrete internal molds of the certain length are manufactured in advance, and the construction method for the small-section vertical shaft without form removal comprises the following steps that S1, during next-layer large-size concrete pouring, the position of the vertical shaft is determined, and an internal mold positioning reinforcing piece is pre-embedded; S2, according to the current-layer large-size concrete pouring thickness, the pre-manufactured annular thin wall concrete internal mold of the corresponding length is selected and lifted to the position of the vertical shaft, the internal mold positioning reinforcing piece is used for positioning,and reinforcing is performed; S3, current-layer large-size concrete is poured, and the internal mold positioning reinforcing piece of the vertical shaft of the last layer is pre-embedded; S4, steps S2and S3 are repeatedly executed till vertical shaft construction is completed. The method has the advantages that no mold removal is performed inside the vertical shaft with the small space, the formremoval procedure is omitted, and the construction progress is greatly accelerated.