4results about How to "Guaranteed dense" patented technology

The application discloses a kind of super-high water pressure dewatering well drainage plugging micro-permeation self-draining structure, it includes the steel pipe well being arranged at basement dewatering well mouth, steel pipe well upper end port sealing, steel pipe well upper is equipped with grouting pipe and drainage pipe, steel pipe well is filled with the gradation sandstone being fixed by hardening cement slurry, basement ground is laid from below to above with concrete cushion layer, waterproof layer and bottom slab reinforced concrete layer, bottom slab reinforced concrete layer is equipped with bottom slab post-cast concrete pit, steel pipe well upper end port, grouting pipe and drainage pipe are located in pit, pit is poured with reinforced concrete, pit above is laid with drainage plate extending to catch basin, the top of bottom slab reinforced concrete layer and drainage plate is laid with concrete surface layer.The application further discloses a kind of construction method of the above-mentioned super-high water pressure dewatering well drainage plugging micro-permeation self-draining structure.The purpose is to provide a kind of super-high water pressure dewatering well drainage plugging micro-permeation self-draining structure and its construction method, its well sealing speed is fast, well sealing effect is good, unnecessary maintenance is reduced in later period.

The concrete-filled steel tube column comprises a steel tube column body, a plurality of air holes are formed in the upper portion of the steel tube column body, an exhaust flow guide steel tube is arranged at each air hole, one end of each exhaust flow guide steel tube is communicated with the interior of the steel tube column body, and the other end of each exhaust flow guide steel tube is communicated with the interior of the steel tube column body. The other end of the exhaust flow guide steel pipe obliquely extends upwards towards the outer portion of the steel pipe column body, the end portion of the exhaust flow guide steel pipe is higher than the end face of the top of the steel pipe column body, and concrete is poured into the steel pipe column body. According to the concrete-filled steel tube column, ventilation of jacking grouting in the steel tube column body is guaranteed by designing the exhaust flow guide steel tube, meanwhile, the end of the exhaust flow guide steel tube is designed to be higher than the top end face of the steel tube column body, compactness of concrete in the steel tube column body is guaranteed, and it is guaranteed that loads of a crane beam support can be directly transmitted to the concrete part of the concrete-filled steel tube column; safety and reliability.

The invention provides a tough low-stress super-thick AlTiN-based coating as well as a preparation method and application thereof, and belongs to the technical field of surface engineering and functional coatings. The coating is obtained through deposition of a high-power pulse magnetron sputtering technology, and the film-substrate binding force is enhanced through glow cleaning and ion source cleaning pretreatment in the preparation process; by utilizing the advantage of uniform and controllable energy of a high-power pulse magnetron sputtering technology, a high-density plasma region is constructed between a target material and a substrate, so that not only can an extremely high deposition rate be obtained, but also the residual stress of the coating is controllable. The prepared coating is excellent in mechanical property, the nanometer hardness is larger than or equal to 30 GPa, the binding force is larger than 100 N, the residual stress under the thickness of 21 micrometers is only-4.5 GPa, and the cutting edge of the prepared coating tool is sharp and smooth. The method can be widely applied to high-speed heavy-load cutting tools, molds and other wear-resistant parts, and the service life can be remarkably prolonged.

This invention belongs to the technical field of sealant adhesive materials, specifically relating to a weather-resistant modified silane sealant and its preparation method. The preparation method of the weather-resistant modified silane sealant of this invention includes the following steps: S1, polypropylene glycol is sequentially subjected to alkoxide treatment and allylation treatment to obtain a polyether containing double bonds; the polyether containing double bonds and mercaptopropyltrimethoxysilane are used as raw materials for end-capping modification to obtain a silane-modified polyether material; S2, the silane-modified polyether material, filler, and plasticizer are mixed and vacuum stirred to obtain a mixture; S3, after cooling, a silane coupling agent, vinyltrimethoxysilane, catalyst, ultraviolet absorber, light stabilizer, and antioxidant are added to the mixture and stirred; the mixture is then discharged and sealed to obtain the weather-resistant modified silane sealant. This invention effectively improves the tensile strength of the material while ensuring good weather resistance of the sealant.