44results about How to "Good construction stability" patented technology

The invention discloses a stiff skeleton structure for bridge closure. The stiff skeleton structure comprises a skeleton body and a locking device, wherein the skeleton body is composed of a pluralityof supporting structures, each supporting structure consists of a first transverse rod, a second transverse rod, a first longitudinal rod, a second longitudinal rod, an inclined rod, a first main inclined support and a second main inclined support; the locking device is arranged on the skeleton body, the locking device is used for being fixedly connected with the end part of a bridge closure section. The stiff skeleton is good in stress stability and high in reliability.

The invention discloses a bi-component silane modified polyether sealing material and a preparation method thereof. The bi-component silane modified polyether sealing material comprises silane modified polyether, a plasticizer, an incremental filler A, a reinforcing filler, a toner, a thixotropic agent, a light stabilizer, hollow glass microspheres, a cross-linking agent, a coupling agent, an incremental filler B, an organic tin catalyst and a titanium catalyst. According to the bi-component silane modified polyether sealing material, organic tin is partially replaced with the titanium catalyst and is low in content, so that the harm of organic tin can be reduced; the production process is simple, a high temperature dehydration process is omitted, and the cost is low; the external and internal parts of a glue layer are simultaneously cured by virtue of moisture of the glue layer during curing, so that the defects that single-component silane modified polyether sealing glue is cured from outside to inside by virtue of moisture and the dept curing is slow are overcome, and the variation of curing rate along the external environment is small, so that the production efficiency is greatly improved; the bi-component silane modified polyether sealing material has good construction stability and can be widely applied to the fields of buildings, automobiles, locomotives, electric products and the like.

The invention discloses a tunnel excavation construction method. The tunnel excavation construction method comprises the steps that (1) the section of a tunnel is provided with a first unit on the upper left portion, a second unit on the upper right portion, a third unit between the first unit and the second unit, a fourth unit on the lower left portion, and a fifth unit on the lower right portion, and at least the lower portions of the first unit and the second unit are partitioned by the third unit; (2) the first unit, the second unit and the third unit are sequentially excavated; and (5) excavation of the fourth unit, construction of a left side inverted arch, excavation of the fifth unit and construction of a right side inverted arch are sequentially conducted. The tunnel excavation construction method comprises construction of the five independent excavation units, when the first unit and the second unit are constructed, the third unit in the middle can maintain stability better,thus construction of the first unit and the second unit can be relatively accelerated, and meanwhile, safety is ensured.

The invention discloses a concrete structure healant and a preparation method thereof, and an application thereof. The healant is composed of the following raw materials by weight percentage: 45-65% of sulphate aluminium cement clinker, 30-50% of ordinary portland cement clinker, 1-3% of a polycarboxylic acid water reducer, 1-5% of an antifoaming agent, and 0.5-3% of cellulose ether; wherein the weight percentage of the raw materials is 100%. The preparation method of the healant has the advantages of simple and convenient process, and convenient construction, and the healant has the advantages of high hour strength, good surface film-forming ability, long slump retaining time, high bonding intensity, no intensity loss at anaphase, and good endurance, and overcomes the disadvantages of poor bonding intensity and anaphase intensity loss of the current concrete healants.

The invention relates to a primer composition for anti-corrosion coatings, which comprises two components A and B, wherein the A component comprises by weight: 15-30 parts of hydroxyl acrylic resin; 2-10 parts of polyaspartic acid resin; Pigment: 10-50 parts of anti-rust pigment, 0.5-3 parts of coloring pigment, 5.5-23 parts of titanium dioxide; additives: 0.1-2 parts of dispersant, 1-10 parts of washing machine water, 0.1-2 parts of anti-settling agent, Leveling agent 0.1~1 part; solvent 1~10 parts; filler 10~30 parts; B component is aliphatic polyisocyanate 5~30 parts. The product of the present invention has a three-dimensional network structure. After the introduction of urea group, it has super acid, alkali and salt chemical resistance; the precise proportion control of each component in the formula makes the product have excellent UV resistance and outdoor performance, which solves the problem of Due to the difficult construction characteristics of urea-based coatings, no special equipment is required, conventional construction has excellent construction performance.