Bien phap thi cong nha thau trang trai bo sua Vinamilk LAO

Bien phap thi cong nha thau trang trai bo sua vinamilk LAO EXPLAINATION OF CONSTRUCTION AND ENGINEERING METHODS Part I - Briefly introduction on construction features Project Vinamilk-Lao Jagro High-tech Beef cattle and Dairy cows farm complex Package no. 12 Supply and installation of barns and warehouse structures Employer Xieng Khouang Lao - Japanese Agricultural Development Company Limited Construction location Paek district, Xieng Khouang province, Lao P.D.R Part II - Processing steel structure at workshop 1. Components are processed at the workshop Equipment for construction in the workshop as follows: - Automatic welding machine = 7 units - Drilling machine = 3 units - Automatic welding machine under 2 layers of welding flux = 2 units - 6-hose Shot Blasting Machine= 1 unit - Workwear (including pants, protective clothing, shoes, and helmets) = 80 sets The structure is manufactured in the factory workshop for convenient arrangement of production workers at the factory: - Researching techniques for design drawings provided by Employer, deploying detailed construction drawings for construction workers. - The process of manufacturing steel structures at the workshop is very important, because whether the accuracy, quality of the components and the perfection of a steel building project are guaranteed or not, it depends on the production process. - The process of manufacturing components in the workshop is shown through the following steps: + Cutting embryos + Fix jigs to shape + Welding, straightening combination + Welding linkage, drilling holes + Clean components + Hot dip galvanized + Packing 2. Marking and cutting - The work of marking and locating components is very important, so it is required that the people who take the mark and cut the shape must obey according to the assignment of engineer, they must necessarily get the mark in accordance with the size of drawings, carefully check before cutting, calculate the dimensions so that no materials are wasted. 3. Positioner welding and forming combination - Before forming, it is necessary to closely inspect the steel sheets, if warping deformation, it must be put into the straightening machine. - Workers must arrange and brace positioner places before positioner welding, must fully prepare all details of the components to be welded. If warping, having gap between the belly plate and the rib plate larger than 3.5 mm, it is required to straighten and re-grinding to the standard. - Positioner welding for limit the height does not exceed 0.5 in height and design welded line under length not exceeding 30mm. After positioner welding and shape formation completed, the next step is to divide the distance to weld positioners for reinforcement bars. 4. Cut flanges and drill holes - The cutting flange must be of the correct size, while cleaning the flange surface, it must be straight, not warped. Marking and drilling holes as designed, clean bavia, hole edges. - The flange joints must check and test the components with bolts, the number of test bolts is 30%. 5. Welding to produce forming complexes - When welding, staggered welding must be carried out, the edges are symmetrical to prevent the bar from being deformed if there are no two welding machines performed simultaneously. - The weld height must be ensured according to the design requirements. The welding line is not porous, and without pitting, welding seams must not have welding slag exceeding the permissible limits. - The base metal unfinished cuts have a depth not exceeding 0.5mm for 10mm thickness steel and 1mm steel plate> 10mm. - After the structure is formed correctly, workers will conduct welding in accordance with the design. In order to ensure that the welding line meets the technical requirements and good quality, workers must often check the adjustment of welding wire, welding flux, welding current so that it is reasonable. - The processing process must strictly follow the standards of TCXDVN 338-2005 steel structure and standard 170-2012 of processed and assembled steel structure.

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