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2024-12-28 21:28 本頁(yè)面
【正文】 oven bags of sand or water tanks, prestent pressure, prepress load for the beam weight of 120%. Stent assembly according to the design when the vertical and horizontal distance from the pole arrangement, the top bracket by backwater leveling, the laying ofhorizontal and vertical square wooden board, installing water tanks, or bags of sand used cranes dipping prestent pressure. In the center of each segment, lateral left and right side cloth 3 points for observation in the prepressure die before the end of the elevation of observations 1, in the process of preloading every 2h observation 1, observation date to the settlement and stability,unloading after the preload pressure on the Elevation of the end of observation 1, observation from the above data to calculate the elastic deformation and foundation support the sink. Preloading accurate measurement of the process can be measured under the load support beam section will have a value of elastic deformation and ground subsidence, this elastic deformation, ground subsidence and construction of control because of other factors need to put forwardcamber settings overlay, calculated construction camber should be used, according to the calculated camber adjustment Elevation of the note the outside of the stent at 2m temporary protective facilities to prevent water and rain water into the stent area, causing stent pleted, remove the tank or adjust the pole height of sand bags. Construction of precamber In determining the camber should consider the following factors: the box itself and after unloading planes live load vertical deflection produced by half。 stent in the elastic pression loads。 bracket under load of nonelastic deformation, the bracket baseloads of nonelastic subsidence。 temperature changes caused by the deflection。 caused by the concrete creep and creep deflection. According to the deflection and deformation of the stent camber calculated from the sum, as the highest camber, set in the midpoint of the beam points of camber to the midpoint of the highest value to both ends of the beam elastic deformation of the Ministry for the stent, according to the distribution of quadratic from the box under the bottom elevation of the box after preloading to readjust the Elevation of the bottom. 2, template fabrication and installation templates to create and install (1) the end of the template used chunk of plywood, shop at the top of longitudinal frame of wood, the wood and plywood with a nail fixed, transfer mode, plete the unloading mode with adjustable backwater. (2) outside the template within 5cm Heavy plate after polishing paste δ = 12mm ~ 15mm bamboo, vertical spacing of 90cm set square wooden support rib, lateral distance of 50cm set channel support outside the direct distribution of the beam mode, when assembled within the outer after the template on the pull with the screw on the pullΦ18. (3) The bination of steel used within the model, the local size change using wooden mold, the template is mainly used for pulling the fastening screw, and connected with the used in the steel box girder formwork support, direct support in the bottom bracket. (4) Plug the template due to perforation of reinforced and prestressed in the template using plywood digging holes, dug by cutting section size, perforation of reinforced and prestressed pipe must be precisely positioning the cutting. Template Installation Notes (1) Production of a template before the first familiar with the parts drawing and template processing maps, engineering structure or ponent to verify the detail size, plex structure should be like by zooming in order to proper preparation, processing and map production of the approved template, inspected and acceptedbefore use. (2) template to seal the joints, where the gap, the use of 107 plastic plug close to plasma leakage. (3) the arrangement of the bolt hole should be vertical and horizontal symmetry, a certain degree of regularity and decoration in good condition. (4) connecting seam tape adhesive template, templates, bent pitched plete acceptance of t
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