Construction method and technical key points of Fountain Project
2020-12-26
(1) before being familiar with the design drawings and mastering the current construction site conditions, the fountain project should first have an overall analysis and understanding of the fountain design drawings, understand their design intent, master design techniques, and conduct on-site investigation on the basis of this, on-site construction conditions should have an overall grasp of which conditions can be fully utilized, which must be cleared and so on. (2) to do the engineering affairs well is to make the construction budget and implement the project contract according to the specific requirements of the project, draw up construction plan, draw up construction chart, draw up construction criterion, safety measure, technical responsibility system and management regulation, etc. . (3) preparation work 1 arrange all kinds of temporary facilities, staff living and office rooms, etc. . Warehouse on demand, to minimize the input of temporary facilities. Organize the materials and machines to enter the market, all kinds of construction materials and machines should be in charge of receiving and registering, make the construction progress, have the purchasing plan, go through the procedures when entering and leaving the warehouse, record carefully, and ensure the quality of the materials. 3. Do a good job of labor deployment. The labor force should be organized reasonably according to the actual construction method and schedule plan, especially when parallel construction or cross construction, more attention should be paid to labor deployment to avoid waste of idle labor. (4) backwater tank construction method 1 check permanent leveling point, set temporary leveling point, check elevation. 2 measure the height of the central pile of the water tank, the elevation of the pipeline on the ground, the side line of the water tank, the boundary line of the soil pile and the temporary land area. 3 when the trench is excavated, the height of the bottom of the trench should not be overdug. The height of the bottom of the trench can be increased by 10 cm than the designed height, and the part of the trench should be reserved. The earthwork excavated in the trench shall be piled up 1.0 meters away from the edge of the trench. Support measures shall be adopted in the soft and dangerous section of the soil to prevent the collapse of the trench. 4 The bottom of the trough is tamped with plain soil, and the four sides of the trough are lined with MU5.0 rubble M5 cement mortar. The selection of raw materials: In order to reduce the heat of hydration, 32.5 grade slag cement was used, and 5-31.5 mm continuous granular crushed stone was used to reduce the shrinkage, ensure the strength and improve the durability and crack resistance of the concrete In order to reach the pouring temperature of concrete mixture at 28.5 °C, deep well ground water is used for mixing, and UEA expansion agent and super slow pumping agent are mixed into concrete to compensate the shrinkage of concrete and delay the release of hydrate, reduce the temperature stress of the bottom plate, improve the pumpability; add grade fly ash in concrete. B. Pouring method: one-time pouring is required to complete, leaving no construction joints, to strengthen the bottom and the wall of the Pond anti-seepage capacity. The concrete is poured from bottom to top by the method of "inclined plane layering, step by step, thin layer pouring, natural flow, continuous construction, one time to top" . C. Vibration: Vibration time, distance between vibration points and insertion depth should be strictly controlled to avoid the leakage of vibration at the junction of each pouring belt. The holding force between concrete and steel bar is increased, and the compactness is increased. D. Surface and bleeding treatment: the concrete surface after pouring molding cement mortar is thicker, should be installed design elevation with scraping ruler, drive away surface bleeding, initial setting, repeated rolling, with a wooden spatula rub surface 2-3 times, to force and collect water cracks. E. Concrete maintenance: In order to ensure the quality of concrete construction and control the generation of temperature cracks, water conservation is adopted. Water Storage, take a layer of plastic film, a layer of grass bags, temporary maintenance of moisture. 5 reference design drawings for installation of overflow and inlet pipelines. When the pipeline is finished, install the water grate cover plate: A. The grates of the springs are made of stainless steel. The size is 600 * 600, the four corners are fixed with 108 * 4,25 high stainless steel ring, the four sides are 30 * 30 * 3 stainless steel, the diagonal straight line is 38 * 25 * 1.5 stainless steel square pipe, the four sides are divided by 25 * 25 * 1.0 stainless steel square pipe. B. The width of the grate is 600, the length is determined on site, the four sides are welded with 30 * 30 * 3 stainless steel pipes, and the middle is welded with 25 * 25 * 1.0 Crossbar. (5) the removal of various auxiliary materials; (6) water surface cleaning and water rock clean treatment; (7) Fountain Pool Disinfection and cleaning. Do the above work, the construction unit should first self-inspection, such as: Drainage, power supply, lights, patterns, etc. , all normal, start to prepare acceptance data.
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