Dalian shotcrete construction machinery using pressure sprayed concrete surface of the component, in order to increase the member section of the construction process. Including steel anchor, soil nails, steel banding, concrete pumps and other construction processes. Second, the scope: 1, for beams, slabs, columns, walls increase the cross-section, increase capacity, component repair after fire, reinforced brick masonry structure in two, apply spray pit slope 3, for the mountain 4 jet slope, the soil is suitable for injection hillside slope three, Dalian Dalian jet sprayed concrete explanation strength grade concrete revetment C10- C50. This project uses dry Dalian injection technology, jet model for PZ-5B-type jets. Dry spray machine capacity 5 ~ 5.5M3 / h, the level of transmission distance of up to 200m, vertical for 40M, motor power 7.5KW, compressor working power of 380V / 75KW. Concrete Rebound injection rate of 25 to 35%. C10 jet label concrete materials. Typically material requirements: no less than 425 # cement, sand (moisture control in the 5% to 7%), gravel particle size less than 15mm, the water pressure 0.15 ~ 0.2MPa, additives (accelerator, content accord design requirements). Construction mix ratio in line with the provisions of the experiment. Dalian dry process shotcrete four former Dalian shotcrete should be prepared to work one, make all kinds of protective equipment and items. 2, clearing obstacles and ensure jet hand mobile space and security to meet the jet away from the optimal distance (spray nozzles to be the vertical distance between the spray surface) of 0.8 ~ 1.0m. 3, preparation, according to the experimental ratio of compounding. The proportion and cement, sand, stone, performance materials, quick-setting agent prior to production use must be carried out by the National Center for testing analog ratio, testing a variety of indicators, such as its strength before use to meet the design requirements. Five points to adjust the injection pressure compressor work and feeding device, so that mixing materials suitable output and speed, air pressure is generally 0.2 ~ 0.4Mp; 1, to ensure the sand, stone moisture control at 4-6 %, dry mixes should be mixed with the use, storage banned too long; 2, regulate the amount of water, the concrete has a suitable consistency so well compacted concrete, and reduce the amount of springback; 3, steel banding After the mesh surface to be sprayed should be kept moist but not have water. 4, spray angle close to 900 as possible, in order to achieve greater strength and minimal rebound pressure, nozzle ring (500 * 150mm) range do curve continuous movement, in order to ensure uniform continuous injection; 5, before the injection well injection height control point, usually at intervals of 2.5m in a row; laying thickness flag blocks. 6, correctly grasp the jet order, not to the back corners and reinforced honeycomb appearance or gizzard, usually bottom-up, the first in the posterolateral; 7, the timely removal of the concrete surface by spraying sand bag or sag, so re-injection; once sprayed concrete thickness of 100mm, using a single injection is completed; 8, the end of each injection operation, should carefully cleaning nozzles; 9, after the site of injection is too rough smooth; 10, injection two hours after the final setting of concrete should be sprayed water conservation, conservation must focus on the first seven days and nights; 11, shotcrete work zone temperature not lower than 5 ℃, otherwise the ingredients required for heating; 12, the construction site should be cleaned after the injection, the gray floor cleaned. Six, Dalian shotcrete project 1, should be removed before injection Dalian work surface obstructions, to clear the muck by the foot of a wall of spray and surface scum, deposits, will be subject to surface cutting hair spray and rinse with high-pressure water jet to control the thickness of concrete buried sign. 2, Dalian jet operations should be layered in turn, jet order from bottom to top. Basis for determining the thickness of the jet injection method, location and admixtures situation. When stratified injection, injection after layer after layer of concrete final setting should be carried forward, if the final setting is injected after 1h, should be washed with water sprayed layer surface. 3, the spray jet for the driver to be continuous and uniform material, should maintain adequate material stored in the hopper when the machine is functioning; working pressure jet nozzle pressure should meet at about 0.1MPa; jet spray work is completed or interruptions when the jets must be accumulated material conveying tube removed. 4, spray nozzle with a hand should be kept in good working performance by the spray nozzle and the surface should be vertical, should maintain a distance of 0.60 ~ 1.00m. 5, Dalian injection rebound rate of concrete, vertical surface by spraying should not exceed 15%. 6, the injection should be stayed if shedding reinforced concrete grid, should be promptly removed. 7, the injection should be required to make the test block and conservation, in accordance with the relevant provisions for inspection. 8, injection 2h after final setting of concrete should be water conservation. Curing time for this project shall not be less than 14d. When the temperature is below + 5 ℃, not water conservation. 9, when the winter construction, operation area of ??the injection temperature should not fall below + 5 ℃, the temperature of the mixture into the jet should not fall below + 5 ℃. Ordinary portland cement prepared shotcrete design strength rating of less than 30%, and not cold. Seven, Dalian concrete pumps should note 1, Dalian shotcrete construction should work closely with other professionals, timely laying of various pipelines and casing and check the position of the hole and stay embedded parts. 2, the original need for sprayed concrete surface should be treated; banding steel mesh reinforced shotcrete firm specializing in Dalian | Dalian reinforcement company product categories: professional mountain slope reinforcement Dalian Model: production