37results about How to "Various construction methods" patented technology

The invention discloses a hydraulic arrangement type sand discharging structure, which comprises sand discharging pipelines, wherein the sand discharging pipelines are laid on the bottom parts of a reservoir, the tail ends of the sand discharging pipelines are connected with a bottom hole or a tunnel of a dam body and provided with gate valves to control the discharge rate; the head ends of the sand discharging pipelines are extended toward up stream, the end parts or proper parts of the sand discharging pipelines are provided with curved pipe segments tilted upward, and upper end openings ofthe curved pipe segments are higher than the expected sand silting face; and one side or / and two side pipe walls of the sand discharging pipes is / are provided with branch pipelines, the upper side pipe walls are provided with gate wells, and the inside of each gate well is provided with control valves. The number of sand discharging pipelines is more than two, and the sand discharging pipelines are laid on the reservoir bottoms on the bank side and in the middle of the reservoir respectively. The number of the gate wells is more than one, the gate wells are arranged on different positions on the upper side pipe wall of each sand discharging pipeline. In the mode of changing the position of a water inlet of a sand discharging hole of the reservoir, the structure utilizes the distributing type space difference generated in laying the sand discharging pipelines to achieve the aim of widening the range of sand discharging; moreover, the structure also has the advantages of unnecessary external energy, high sand discharging efficiency and good social and economic benefits.

The invention discloses an active inorganic anticorrosive coating for improving the bonding strength between a steel bar and concrete. The active inorganic anticorrosive coating comprises the following components in parts by weight: 20-35 parts of phosphorus pentoxide, 20-40 parts of silicon oxide, 10-25 parts of aluminum oxide, 5-30 parts of an active binder, 10-20 parts of a flatting agent and 0-5 parts of an anti-cracking agent. The invention further discloses a coating method of the active inorganic anticorrosive coating for improving the bonding strength between the reinforcing steel barand the concrete. The coating method comprises the following steps: 1) preparing a coating; 2) performing base material treatment; 3) coating; 4) sintering; 5) cooling. The method is simple in process, low in cost and good in corrosion resistance; after the active binder is added, the bonding strength between the coating plain round steel bar and the concrete is 4-8 times that of a common plain round steel bar, and the bonding strength between the coating twisted steel bar and the concrete is 1.5 times or above that of the common twisted steel bar; the dynamic bonding strength between a steelbar coated with the coating and concrete and the bonding strength after high temperature are obviously superior to those of a common steel bar and an epoxy coating steel bar.

An inorganic anticorrosive coating layer for high-strength metal. The coating layer is formed on the surface of high-strength metal by sintering a coating at a high-temperature of 500-800°C. The coating comprises 25-35 parts of a silicon oxide, 10-25 parts of phosphorus pentoxide, 10-25 parts of aluminum oxide, 2-15 parts of a fiber, 15-30 parts of a modifier, and 1-3 parts of an anti-cracking agent, wherein the fiber is one or a combination of two or three of alumina silicate fiber, basalt fiber, and calcium carbonate fiber. Multiple sealing holes of which the diameters account for 1 / 30-1 / 10 of the thickness of the coating layer are distributed inside the coating layer, and the number of the sealing holes is reduced from inside to outside. The porosity of a porous inner layer close to the surface of the high-strength metal is 2-15%, and the porosity of a dense outer layer far away from the surface of the high-strength metal is 0-2%. The inorganic anticorrosive coating layer is good in toughness, high in adhesion performance to a substrate, excellent in corrosion resistance, diverse in construction mode and low in use cost, and no crack penetrating through the coating layer is caused during micro strain of 2800-3000.