Installation of cold-rolled hood furnace high-precision steel platform by reverse method
The second draft of the second paragraph of the construction technology was extracted by the reverse method. The cold-rolled hood type precision steel platform Angang cold-rolling mill was installed on the reinforced concrete foundation of the 24-seat furnace steel platform. The platform height is 3.3 area 938. 洳 2. It is forged by the moving beam length of 59.6 minutes, the first length is 13.8, the first, the forging is 66 square 艮, and the weight 3004 design requires the platform to have a flatness of no more than ± 2 meters. Construction, the specific approach is as follows: 1 first place the steel column in place. Put it into the cup or bolt node and don't fix it. After entering the beam installation house, the main beam will be framed up. After finding the center, adjust the main beam standard through the jack; the level of the 1.1 is matched to make the surface meet the design requirements. 3 The bolts are connected up and down, and the steel column is hung on the main beam. At this time, the load of the steel column is carried by the main beam, and the main beam should be strictly measured and inspected. Because the steel column is deformed, the affected surface is flat. Therefore, a subtle measurement check must be performed. 4 After the measurement and inspection, adjust the platform accordingly, fix the column foot, grout or fasten the bolt. After the fixed strength is reached, remove the jack and the horse is used to control the installation of the secondary beam and the platform plate according to the elevation of the beam. Welding should pay attention to the deformation of components caused by temperature stress and affect the accuracy of the platform. The characteristics of the reverse process are as follows: 1. Application of reverse construction, with high-precision level, the accuracy of steel platform installation can reach ±2, and can be improved to the current standard of the staff! Can meet the special quality requirements. 2 Reverse construction can digest the manufacturing error of the steel column steel beam in the gap between the bolt joint and the cup mouth and the bottom of the column. 3 Reverse the construction method to adjust the flatness of the beam, adjust the single root than the positive method. The flatness of the column forming group column network is convenient for the fast Angang cold rolling mill. The installation of the hood furnace steel platform adopts the reverse method to save the construction period of 13, and a total of 288 points are checked. The pass rate is 100, and only the maximum value is 1. 24 meets the requirements of setting up soil 21 and committing crimes. Liu Fuyang's hyperbolic cooling tower construction shaft erection overall displacement. When we constructed the hyperbolic cooling tower group of Matou Power Plant in Xingtai Power Plant, Hebei Province, after the construction of the cooling tower was completed, the overall displacement construction method was adopted. Move the derrick of more than 100 meters high to the construction site of the other cooling tower as described below. 1 Shaft gantry overall displacement preparation 1 In the first installation of the shaft derrick, it is necessary to prepare for the displacement of the derrick in the future. The concrete foundation should be set according to the load of the derrick and the allowable bearing capacity of the foundation. Rails, rails are covered with butter, and the shaft frame chassis is installed. The concrete foundation is poured at the predetermined installation position after the shaft frame is displaced. The roadbed is ground between the two foundations. The gravel roadbed should be layered and compacted. The sleepers should be The lateral length is set at a distance of 60. The rails should be fixed by tie rods. The newly laid rails are connected with the rails on the foundation of the shaft derricks. 3 Remove the suspension bridge and put 4 cables per layer of the cable wind rope. The vertical spacing between the layers is about 30,1 and the stress concentration of the grounding structure and the cable wind rope tie joints are required. It is necessary to add 1 at each of the 12 1 pull points. 47 long 5, 1 steel pipe to strengthen the frame. After the body is solidified, all the inverted chains are tightened. Except for the above-mentioned 1 tooth-encrusted wind rope, the other cable wind ropes are untied. After the vertical shaft frame is displaced, the ground anchor is tightened. 4 Remove the objects that cannot be fixed on the shaft erection, and set the dangerous warning zone with the height of the shaft gantry as the radius. It is forbidden for the unrelated personnel to enter the 2 derrick shift. 1 The track on the front of the derrick is covered with butter, and then the shaft is slightly relaxed. The cable wind rope on the rear side of the frame tensions the front cable wind rope so that the shaft frame is slightly inclined forward without exceeding the height of the derrick height. Due to the large frictional resistance during initial movement, two jacks should be used at the same time. When the derrick moves forward to the vertical, the traction is stopped. The adjustment of the cable rope during the displacement of the derrick should be on the side and front of the derrick. Each set of theodolite is used to observe the verticality of the shaft rig at any time, and the observation results are reported to the commander in time. Repeat the adjustment of the cable wind rope traction chassis to adjust the cable rope until the shaft frame is moved to the predetermined position. After the displacement of the shaft derrick is completed, the verticality of the frame body is accurately measured by the theodolite, and the installation of all the cable windproof bulletproof glass is tightened after adjustment. Currently, the bulletproof glass has been widely used in the financial industry. There are two kinds of fixing methods for bulletproof glass, that is, the glass is placed horizontally, and the two ends are fixed on the column. According to the application, the upper and lower parts are divided into two parts. The ground is 1200 1400 claws, and the height is overlapped by 2, above, two glasses. Leave 15 gaps between them to transmit sound, fixed up and down, that is, the glass is vertically arranged. If necessary, the left and right glass are overlapped by 251 or more to form a vertical joint. There are still 20, 1 gaps between the glass; the upper end of the glass is extended. 60 in the notch reserved for the lower end of the rigid beam, the glass is fixed with the length of the rubber strip, and the groove is concealed when the beam is facing under the beam; the lower opening of the glass extends into the surface of the platen 30 or more, and the rubber cushion layer of the lower pad First, fix the glass position and then build the surface layer of the platen. Before the construction of the table top, close the glass and place a laminate. After the mortar is solidified, the plate will be pulled out to keep the gap clean. After the curing is finished, the gap is dry and glued. . At present, the upper and lower fixing method is gradually replacing the left and right fixing method, because the upper and lower fixing method can form a vertical seam which needs to be left in a large area, and is better than the transverse seam in transmitting sound and ventilation. According to the engineering practice, the upper and lower fixing methods should pay attention to the following aspects: 1 The height of the bulletproof glass should be within 2,1, too high, the glass size is too large, the installation is in place, and the upper end of the fixed glass is difficult. There is enough thermal expansion and contraction, otherwise rigid beams should be added because the vibration displacement of the upper part of the glass will cause local damage to the glass, affecting the appearance and the use of the lower end of the glass. The fixing is usually related to the place of use, such as in the middle of the counter wall. Basically, it can guarantee sufficient strength and rigidity, but it should not be too tight when the lower end is fixed. The glass should have appropriate space for movement, that is, there should be a gap of 31 between the glass and the countertop. Fill the glass with glass glue. There is vibration at the upper end. Displacement, not to cause cracks in the roots, the bottom of the glass should have a buffer layer, it is not appropriate to make the glass directly on the hard base layer. The bulletproof glass must have a certificate test report and other information. Usually, the place where bulletproof glass is used is very important. The place must pass the inspection and acceptance of the public security department, Zhang Jianmin, Ma'anshan Power Plant, Anhui Province. Manicure Set,Manicure Tools Suit,Manicure Pedicure Set,Nail Tools Yangjiang Etina Houseware Co., Ltd. , https://www.stjsrobot.com