5results about How to "Reduce grouting time" patented technology

The invention discloses ZmPHYB1 and ZmPHYB2 gene mutants and application of the ZmPHYB1 and ZmPHYB2 gene mutants in corn seeds, and belongs to the field of plant biotechnology breeding. According to the corn ZmPHYB1 and / or ZmPHYB2 gene provided by the invention, after a plant generates function loss mutation of an endogenous gene or the expression of the ZmPHYB1 and / or ZmPHYB2 gene is inhibited, phenotypes with smaller grains, reduced grain weight, shortened corn grain filling time, reduced grain water content and / or improved dehydration rate can be obtained; the gene resource and the application method thereof have a wide application prospect in the field of corn breeding.

This invention belongs to the field of grouting reinforcement technology for fractured surrounding rock, and discloses a directional grouting reinforcement method for fractured surrounding rock around a tunnel. This method aims to solve the problems of large grouting volume, long construction period and high cost caused by the existing grouting methods used for fractured surrounding rock in tunnels. The invention includes: (1) drilling holes into the fractured surrounding rock around the tunnel; (2) inserting grouting pipes into each hole, wherein at least three rows of grouting ports are provided along the length of the grouting pipe, and each row of grouting ports contains multiple grouting ports. The included angle between the two outermost rows of grouting ports on the grouting pipe is 100°-135°, and the grout sprayed from the two adjacent rows of grouting ports on two adjacent grouting pipes in the fractured surrounding rock around the tunnel can form an overlapping area; (3) injecting grout into the grouting pipe, and the grout sprayed from each grouting port of the grouting pipe into the gaps of the fractured surrounding rock to complete the grouting reinforcement of the fractured surrounding rock.

The utility model discloses a kind of inclined coal seam gas extraction borehole multistage sealing structure. Inclined coal seam gas extraction borehole multistage sealing structure includes: extraction pipe, front limiting air bag and rear limiting air bag are installed on the extraction pipe, pressure compensation air bag is installed on the sealing section of the extraction pipe;Grouting pipe and reflux pipe are installed on the rear limiting air bag, one end of the grouting pipe is close to the front limiting air bag, one end of the reflux pipe is close to the rear limiting air bag. The inclined coal seam gas extraction borehole multistage sealing structure provided by the utility model can realize multistage sealing of gas extraction hole by installing front limiting air bag, rear limiting air bag, pressure compensation air bag, grouting pipe and reflux pipe on extraction pipe, has better sealing effect, and effectively reduces grouting usage, saves grouting time.

The utility model discloses a house building engineering structure crack grouting device, which relates to the technical field of building engineering, and comprises a bottom plate, universal wheels with brakes are fixedly connected to the bottom of the bottom plate close to four corners, a push rod is fixedly connected to the top of the bottom plate, a material barrel is fixedly connected to the top of the bottom plate, and the material barrel is totally closed. A large amount of slurry can be stored through the material barrel, the material barrel and a crack can be directly communicated through the discharging pipe, the material conveying pipe and the slurry injection pipe, the movable plate pushed by the first air cylinder is arranged in the material barrel, the movable door is arranged on the movable plate, and the movable door is arranged on the movable plate. Therefore, the movable plate can be pushed through the first air cylinder to extrude slurry, the slurry in the material barrel is directly conveyed into a crack, the slurry can be continuously conveyed for a long time, the slurry supplementing frequency is reduced, the overall grouting time is shortened, use is convenient, and the grouting efficiency is improved.

The utility model discloses a fast grouting device for a tunnel advanced small guide pipe, which comprises two grouting cylinders and a plurality of mixers, wherein each grouting cylinder is a horizontally arranged cylinder body, and the left end and the right end of each grouting cylinder are closed; the left end and the right end of each grouting cylinder are axially connected with a first galvanized pipe respectively; the first galvanized pipe at the left end is used for being connected with a grouting pump; valves are arranged on the first galvanized pipes at the right ends; a plurality of grout guide pipes are arranged on the side wall of the upper portion of each grouting barrel at intervals in the length direction of the grouting barrel, and all the grout guide pipes perpendicularly communicate with the grouting barrels. The number of the mixers is the same as that of the slurry guide pipes on one grouting barrel, each mixer is provided with two slurry inlets and a slurry outlet, one slurry inlet corresponds to one grouting barrel and is connected with one slurry guide pipe on the grouting barrel, and one slurry outlet is connected with one advanced small guide pipe. By adopting the device, rapid grouting of a plurality of advanced small guide pipes is achieved, meanwhile, machining and dismounting are convenient, and reutilization can be achieved.