56results about How to "Safeguard Resilience" patented technology

The invention particularly relates to nano recycled concrete, a processing technology and an application thereof. The existing nano recycled concrete also has the following defects that the corrosion prevention effect is not ideal when a conventional marine corrosion prevention technology is applied to a coastal assembly structure for 3D printing, and in addition, interlayer interface bonding and thixotropy of a conventional 3D printing material are insufficient. The invention provides nano recycled concrete. The nano recycled concrete is prepared from the following raw materials: compound cement, recycled sand, fly ash, polyvinyl alcohol, graphene oxide, steel fibers, organic fibers, a water reducing agent, a thickening time control agent, a mineral admixture and water. The 3D printing concrete has good cohesive water-retaining property and adjacent thin layer interface cohesiveness, a micro-capacitor is formed through combination of GO and PVA electrolyte to avoid formation of a corrosion battery in a concrete thin layer, and the 3D printing concrete has good marine durability and has good application prospects when being applied to coastal assembly structure engineering.

A pipe body structure of a step type hole protecting pipe for a gas extraction hole in a soft coal bed, and belongs to the hole protecting pipe. The hole protecting pipe comprises multiple groups of pipes, which are connected from the front end to the tail end in sequence; the diameters of the pipes in different groups are different, the diameters of the pipes in each group of pipes from the front end to the tail end of the hole protecting pipe are reduced in sequence, and every two adjacent pipes in different groups are connected through a reducer pipe; the whole profile of the hole supporting pipe is of a step type structure with a gradually changed diameter; the diameters of the pipes in the same group are the same, and the lengths of the pipes are the same; sieve pores are not formed in the pipe walls of one group of pipes at the most front end but are formed in the pipe walls of the rest groups of pipes, and the pore diameters of the sieve pores in the pipes in the same group are the same; the number of the sieve pores in each group is reduced from the front end to the tail end in sequence; the diameters of the sieve pores in each group are reduced from the front end to the tail end in sequence, the minimal diameter is 4 mm, and the maximal diameter is 10 mm; and the sieve pores are externally wound with gauzes. The pipe body structure has the advantages as follows: the structure is simple, the hole protecting pipe is not easily blocked and is more easily fed in a deflected drilled hole due to large flexibility, the hole protecting length is long, and the gas extraction efficiency is high at the same time. Therefore, the pipe body structure is suitable for the gas extraction hole in the soft easily-collapsed coal bed.