259results about How to "Convenient grouting" patented technology

The invention relates to a method for directly producing core inside the narrow groove and blind hole of wax hole, which provides a method that casting core with simple molding pattern. Said method fills the slurry with accelerant into the forward groove and blind hole before assembling the wax mold to prepare the core, which comprises: preparing wax mold to be compressed; preparing wax mold; adding raw materials at the mass percentages as: fireproof material : accelerant : surface active agent : defoaming agent as 100 : (100-40) : (0.1-10) : (0.1-0.3) : (0.1-0.3) to prepare the slurry; then filling into the wax mold to be shaped; being solidified to attain the core inside the narrow groove and blind hole. The inventive method is simple without special device and it can save energy, reduce cost, with shorten producing period.

The invention discloses an early-strength quick-drying refractory mud filling material with a good insulativity. The filling material is prepared through the following steps: adding water in 100 parts of main raw material and 1-10 parts of composite additives, mixing, ageing mixture or fermenting, grouting, naturally drying and baking, wherein the main raw material is a mixture of sintered mullite, quartz sand powder, alumina micropowder and pure calcium aluminate cement; and the composite additives are lignosulfonate, sodium carboxymethylcellulose and one substance or a mixture of two substances selected from subnano alumina micropowder with a grain size of 0.25-0.50 mu m, silicon micropowder with a grain size of 1-2 mu m, sodium tripolyphosphate, sodium hexametaphosphate and sodium polyphosphate. The filling material has good properties such as good early strength, rapid consolidation speed, no moisture regain and good insulativity, dose not corrode metals, can be widely applied to a metallurgy smelting high temperature sensor and a rapid temperature-measuring element to be used as an insulation material.

The invention discloses a quantitative uniform grouting machine. The quantitative uniform grouting machine comprises a rack component, a water collecting tank, first linear guide rails, a translation rack, a motor assembly, second linear guide rails, an equivalent grouting barrel and an air cylinder, wherein the motor assembly is used for driving the translation rack, and the air cylinder is used for driving the equivalent grouting barrel; the water collecting tank is arranged on the lower part of the rack component, and the translation rack is fixed to the top of the rack component by virtue of the first linear guide rails and can slide back and forth along the first linear guide rails; the motor assembly, the air cylinder and the second linear guide rails are arranged on the translation rack, and the equivalent grouting barrel is fixed to the translation rack by virtue of the second linear guide rails and can slide back and forth along the second linear guide rails; the first linear guide railsare perpendicular to the second linear guide rails. According to the quantitative uniform grouting machine, the first linear guide railsare perpendicular to the second linear guide rails, so that the equivalent grouting barrel flexibly moves, the quantitative uniform grouting machine has the advantages of simple structure, convenience in operation and strong flexibility, and a plurality of mold cavities in a mold can be quantitatively and uniformly grouted.

The invention relates to the field of coal mine fire prevention, in particular to a method for preventing spontaneous combustion of coal in upper and lower levels of goafs in contiguous coal seam groups in lower layer of coal seam of low seam thickness and small coal seam spacing, in the mining and recovery process. The method for preventing spontaneous combustion of coal in the upper and lower levels of goafs in the contiguous coal seam groups includes the following steps: determining coal spontaneous combustion prevention and control key areas in the upper and lower goafs of the contiguous coal seam groups; carrying out surface drilling and grouting processes in the coal spontaneous combustion prevention and control key areas before mining the lower layer coal seam in the contiguous coalseam groups so as to completely cover the coal left in the upper goafs; after 500m below the lower layer of the contiguous coal seam groups is mined, and 15 days after the completion of mining, connection roadway closed grouting hole grouting and return airway embedded grouting pipe grouting are carried out in the coal spontaneous combustion prevention and control key areas in the upper and lowergoafs of the contiguous coal seam groups.

The invention provides a steel reinforced cage applicable to an air shaft underground continuous wall and a using method thereof. The steel reinforced cage comprises two layers of steel reinforced meshes; the two layers of steel reinforced meshes are connected to each other through truss ribs; the truss ribs comprise longitudinal truss ribs and horizontal truss ribs; main ribs are arranged in thelength direction of the steel reinforced cage; the longitudinal truss ribs are arranged parallel to the main ribs at intervals; one end of each longitudinal truss rib is connected to a hanging rib; the horizontal truss ribs are perpendicularly and fixedly connected to the longitudinal truss ribs; the longitudinal truss ribs intersect and are connected to the horizontal truss ribs; a shearing support is arranged on the horizontal truss ribs on the inner sides of the steel reinforced cage, and is used for fixing and moulding the longitudinal truss ribs and the horizontal truss ribs. According tothe steel reinforced cage, the sizes of components can be compatible; the phenomenon of twisting, deforming and shattering during conveying is avoided; hoisting and positioning are convenient; the size of each steel reinforced cage is uniform; the integral rigidity of the steel reinforced cage is large; and meanwhile, twisting and deforming can be well avoided during conveying and hoisting.

The invention discloses a novel composite type groutable anchor rod and belongs to the technical field of mineral engineering anchorage supporting. The anchor rod comprises an outer sleeve, an inner rod body of which the middle is provided with a backflow cavity, a base plate, a nut and a check ring, and grouting holes are formed in the check ring. Grout is poured into a grouting cavity between the outer sleeve and the inner rod body through the grouting holes in the check ring and then is poured into a rock stratum through holes formed in the outer sleeve, after drilling holes are filled with the grout fully, the grout flows back through the backflow cavity, and accordingly grouting is completed. By adopting the anchor rod to conduct supporting, the problems that traditional grouting anchor rods are not high in supporting force and limited in grouting range, and whether drilling holes are filled with grout completely cannot be effectively judged can be solved; grouting is conducted on the deep soft rock stratum, a plastic zone can be decreased, the anchorage force of the anchor rod is increased, and accidents are decreased.

The invention belongs to the technical field of crop cultivation, and particularly relates to a chenopodium quinoa planting method suitable for Huang-Huai-Hai region. The method includes following steps: preparing land before sowing; applying acetochlor mixing liquid and base fertilizer; performing seed screening and treating; ditching and sowing; performing field management. By the planting method, chenopodium quinoa in the Huang-Huai-Hai region is enabled to be high in seedling emergence rate, good in growing trend and high in yield and quality; ditching is conducted during a branching period, so that root system development in a vigorous growing period can be promoted, growing of base nodes can be controlled, and stems are enabled to be thick and strong; earth-up treatment is combined, so that growing of neck nodes is promoted, supporting capability of plants is enhanced, and later lodging can be prevented.

The invention discloses a polyurethane compound suitable for grouting. The polyurethane compound comprises the following raw materials by weight: 30-60 parts of polyether, 3-12 parts of methyl silicone oil, 3-15 parts of a plasticizer, 10-25 parts of a flame retardant, 25-50 parts of polypropylene glycol, 1-7 parts of dihydromethyl propionic acid, 2-10 parts of a chain extender, 2-10 parts of a catalyst, 20-35 parts of polyisocyanate, 10-25 parts of polyether polyol, 20-60 parts of isophorone diisocyanate, 10-25 parts of glycerol, 2-15 parts of pentaerythritol, 2-8 parts of a defoaming agent, and 3-7 parts of a diluents. The preparation method provided by the invention is simple, and the prepared grouting composition can be used in a high-pressure environment, and can maintain the high strength characteristic for a long time, thus being suitable for popularization.

The invention provides a collapsible loess compaction pile construction device and method capable of reducing the thickness of falling soil. The collapsible loess compaction pile construction device comprises a hammering device and a hole forming pile pipe. A grouting hole is formed in the position, lower than a hammering protective sleeve, of the upper end of the hole forming pile pipe, and the length of a pipe body below the grouting hole is equal to or larger than the depth of pile holes. A plurality of grout spraying holes are formed in the positions, higher than an expansion ring, of the lower end of the hole forming pile pipe. The construction process of a compaction pile comprises the steps that after pile hole construction is completed by hammering the sinking pipe, the grouting hole is connected with a grouting pump, grout spraying operation is uniformly conducted on the walls of the pile holes through the grout spraying holes in the wall of the hole forming pile pipe in the pipe pulling process, the inner wall surfaces of the pile holes are cured, and filling work is conducted after curing. According to the collapsible loess compaction pile construction device and method capable of reducing the thickness of the falling soil, construction is easy, the quantity of the falling soil on the hole walls is decreased through curing of the hole wall surfaces, the situation that layered compaction of plain soil/lime soil subsequently is affected due to the fact that the falling soil is thick in the hole forming process is avoided, the pile hole depth is also ensured, and the construction progress and the construction quality are improved.

The invention relates to a waterproof single-layer lining structure and construction technology thereof, and belongs to the technical field of subway construction. According to the main points of the technical scheme, the waterproof single-layer lining structure includes a base concrete layer, a supporting concrete layer, a waterproof isolation layer, a reinforced concrete layer, a waterproof concrete layer, and a nanometer coating layer, wherein the base concrete layer, the supporting concrete layer, the waterproof isolation layer, the reinforced concrete layer, the waterproof concrete layer and the nanometer coating layer are arranged successively from an arch structure close to a tunnel main body to one side of the earth surface; the supporting concrete layer is provided with a steel bar skeleton; and the waterproof isolation layer is made of corrosion-resistant metal, and the waterproof concrete layer is grouted by waterproof concrete mud and internally provided with a waterproof cloth. The problem of poor waterproof effect when the single-layer lining structure is constructed in the place with abundant groundwater is solved, and when subway construction is at the location where groundwater is abundant, the main structure of the tunnel can be well supported, water-proofed and anti-permeated.

The invention is an antistatic ceramic, which is made of the following raw materials in parts by weight: silicon nitride 60-75, kaolin 10-16, aluminum oxide 2-8, silicon dioxide 2-5, tin oxide 3‑9, zirconia 1‑5, molybdenum disilicide 1‑3, antimony powder 10‑15, titanium dioxide 1‑3, conductive graphite 5‑6, silicon carbide 1‑5, boron carbide 1‑2, aluminum nitride 1 ‑2, thorium oxide 2‑4, appropriate amount of deionized water. The ceramic prepared by the present invention has certain electrical and thermal conductivity, prevents the generation of static electricity, prevents frictional overheating, prolongs the service time of pipelines and channels, and the ceramic of the present invention also has certain corrosion resistance and oxidation resistance, and has Good toughness.

The invention relates to the technical field of paddy rice seed breeding, especially relates to a paddy rice hybridization method with castration through glume cutting and alcohol spraying, and aims to increase the varietal hybridization matching efficiency of paddy rice. The paddy rice hybridization method includes the steps of uniformly spraying 60-80% of medicinal alcohol on ears of rice of a female parent plant, of which 1/2-2/3 of glume hull has been cut, for performing castration and disinfection, covering the treated female parent plant by a light-proof kraft paper bag, and performing pollination at proper time and harvesting the hybridization seeds. The hybridization method is mainly characterized in that by means of the medicinal alcohol for spraying the ears of rice which has been pruned and glume-cut. The raw materials are easy to obtain. The method is low in cost, is convenient to carry out, is simple and is easy to learn, is greatly reduced in castration time compared with other relative methods in the prior art, and is greatly improved in efficiency.

The invention provides a prestressed prefabricated concrete shear wall system and a construction method thereof. The prestressed prefabricated concrete shear wall system comprises prefabricated shearwalls and prestressed reinforcements; the transversely adjacent prefabricated shear walls are connected with each other through tongues and grooves; reinforcement through passages are formed in the prefabricated shear walls; anchor bearing plates are buried in positions, corresponding to the reinforcement through passages, at the tops of the prefabricated shear walls; through holes and grout outlets are formed in the anchor bearing plates; gaps are reserved in the bottoms of the prefabricated shear walls; the gaps communicate with the reinforcement through passages; the prestressed reinforcements penetrate through the reinforcement through passages; a first reinforcement connector at the top of the prefabricated shear wall in the lower layer is correspondingly inserted in the gap of the prefabricated shear wall in the upper layer and is connected with the gap through the first reinforcement connector; the gap is filled with a filling material; a grouting pipeline is buried in the filling material; and passage grouting materials are poured in the reinforcement through passages. According to the prestressed prefabricated concrete shear wall system and the construction method thereof,the technical problems of high making accuracy requirement, high quality control difficulty, lack of effective grouting quality detection means, difficult member transportation, multiple site wet operations and longer construction period of a traditional prefabricated shear wall are solved.

The invention discloses an assembling type concrete column base node structure and a construction method thereof. The assembling type concrete column base node structure comprises a reinforced concrete foundation and a prefabricated reinforced concrete column, wherein the part of the top surface of the reinforced concrete foundation, corresponding to the connection of the prefabricated reinforcedconcrete column, is provided with a rough surface; the parts in the reinforced concrete foundation, corresponding to vertical reinforcements in the prefabricated reinforced concrete column, are provided with foundation anchoring reinforcements; vertical grouting sleeves sheath the upper parts of the foundation anchoring reinforcements; the top parts of the grouting sleeves are level to the top part of the reinforced concrete foundation; a circle of externally-wrapping steel plates are arranged at the lower part of the prefabricated reinforced concrete column; exhausting holes and grouting holes are formed in the externally-wrapping steel plates; corresponding to the externally-wrapping steel plates in position, a top plate, cross partitioning plates, vertical partitioning plates, groutingpipes and exhausting pipes are also embedded in the prefabricated reinforced concrete column. The assembling type concrete column base node structure and the construction method disclosed by the invention have the beneficial effect that the technical problem of damage of the column base due to poor deformation capability and mechanical property of the column base node with the assembling type structure is solved.

A water burst blast hole plugging method comprises the steps of (1) stopping drilling instantly and withdrawing a drill rod when water burst occurs during blast hole drilling; (2) ejecting a high-pressure rubber expansion rubber hose into the bottom of a hole with a drilling machine, wherein the two ends of the high-pressure rubber expansion rubber hose are sealed, and a check valve and a water injection rubber hose are installed at one end of the high-pressure rubber expansion rubber hose; (3) injecting pressure water into the high-pressure rubber expansion rubber hose with a high-pressure pump by means of the water injection rubber hose to enable the high-pressure rubber expansion rubber hose to be large enough to abut against the blast hole; (4) withdrawing the drilling rod; (5) conducting grout sealing on the blast hole; (6) stop grouting after the blast hole is filled with grout. The method well achieves hole plugging when water burst occurs during blast hole drilling which is conducted in an area with abundant underground water and is highly targeted, the high-pressure rubber expansion rubber hose is expanded after reaching the bottom of the hole, water burst is prevented from being continued through the blast hole, the portion, between the high-pressure rubber expansion rubber hose and the opening of the blast hole, of the blast hole does not contain gush water any more, cement mortar grout sealing can be conducted on the blast hole conveniently, sealing is easy and convenient, construction speed is high, quality is high, grout loss is avoided, plugging effect is good, and cost is low.